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# gl (wx v2.5.4)

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Erlang wrapper functions for OpenGL

Standard OpenGL API

This documents the functions as a brief version of the complete OpenGL reference pages.

## Summary

### Types

clamp()
enum()
f()
i()
m12()
m16()
matrix()
mem()
offset()

### Functions

accum(Op, Value)

The accumulation buffer is an extended-range color buffer. Images are not rendered into it. Rather, images rendered into one of the color buffers are added to the contents of the accumulation buffer after rendering. Effects such as antialiasing (of points, lines, and polygons), motion blur, and depth of field can be created by accumulating images generated with different transformation matrices.

activeShaderProgram(Pipeline, Program)

`gl:activeShaderProgram/2` sets the linked program named by `Program` to be the active program for the program pipeline object `Pipeline`. The active program in the active program pipeline object is the target of calls to `gl:uniform()` when no program has been made current through a call to `gl:useProgram/1`.

activeTexture(Texture)

`gl:activeTexture/1` selects which texture unit subsequent texture state calls will affect. The number of texture units an implementation supports is implementation dependent, but must be at least 80.

alphaFunc(Func, Ref)

The alpha test discards fragments depending on the outcome of a comparison between an incoming fragment's alpha value and a constant reference value. `gl:alphaFunc/2` specifies the reference value and the comparison function. The comparison is performed only if alpha testing is enabled. By default, it is not enabled. (See `gl:enable/1` and `gl:disable/1` of `?GL_ALPHA_TEST`.)

areTexturesResident(Textures)

GL establishes a ``working set'' of textures that are resident in texture memory. These textures can be bound to a texture target much more efficiently than textures that are not resident.

arrayElement(I)

`gl:arrayElement/1` commands are used within `gl:'begin'/1`/`gl:'end'/0` pairs to specify vertex and attribute data for point, line, and polygon primitives. If `?GL_VERTEX_ARRAY` is enabled when `gl:arrayElement/1` is called, a single vertex is drawn, using vertex and attribute data taken from location `I` of the enabled arrays. If `?GL_VERTEX_ARRAY` is not enabled, no drawing occurs but the attributes corresponding to the enabled arrays are modified.

attachShader(Program, Shader)

In order to create a complete shader program, there must be a way to specify the list of things that will be linked together. Program objects provide this mechanism. Shaders that are to be linked together in a program object must first be attached to that program object. `gl:attachShader/2` attaches the shader object specified by `Shader` to the program object specified by `Program`. This indicates that `Shader` will be included in link operations that will be performed on `Program`.

'begin'(Mode)

Equivalent to `'\'end\''/0`.

beginConditionalRender(Id, Mode)

Equivalent to `endConditionalRender/0`.

beginQuery(Target, Id)

Equivalent to `endQuery/1`.

beginQueryIndexed(Target, Index, Id)

Equivalent to `endQueryIndexed/2`.

beginTransformFeedback(PrimitiveMode)

Equivalent to `endTransformFeedback/0`.

bindAttribLocation(Program, Index, Name)

`gl:bindAttribLocation/3` is used to associate a user-defined attribute variable in the program object specified by `Program` with a generic vertex attribute index. The name of the user-defined attribute variable is passed as a null terminated string in `Name`. The generic vertex attribute index to be bound to this variable is specified by `Index`. When `Program` is made part of current state, values provided via the generic vertex attribute `Index` will modify the value of the user-defined attribute variable specified by `Name`.

bindBuffer(Target, Buffer)

`gl:bindBuffer/2` binds a buffer object to the specified buffer binding point. Calling `gl:bindBuffer/2` with `Target` set to one of the accepted symbolic constants and `Buffer` set to the name of a buffer object binds that buffer object name to the target. If no buffer object with name `Buffer` exists, one is created with that name. When a buffer object is bound to a target, the previous binding for that target is automatically broken.

bindBufferBase(Target, Index, Buffer)

`gl:bindBufferBase/3` binds the buffer object `Buffer` to the binding point at index `Index` of the array of targets specified by `Target`. Each `Target` represents an indexed array of buffer binding points, as well as a single general binding point that can be used by other buffer manipulation functions such as `gl:bindBuffer/2` or `glMapBuffer`. In addition to binding `Buffer` to the indexed buffer binding target, `gl:bindBufferBase/3` also binds `Buffer` to the generic buffer binding point specified by `Target`.

bindBufferRange(Target, Index, Buffer, Offset, Size)

`gl:bindBufferRange/5` binds a range the buffer object `Buffer` represented by `Offset` and `Size` to the binding point at index `Index` of the array of targets specified by `Target`. Each `Target` represents an indexed array of buffer binding points, as well as a single general binding point that can be used by other buffer manipulation functions such as `gl:bindBuffer/2` or `glMapBuffer`. In addition to binding a range of `Buffer` to the indexed buffer binding target, `gl:bindBufferRange/5` also binds the range to the generic buffer binding point specified by `Target`.

bindBuffersBase(Target, First, Buffers)

`gl:bindBuffersBase/3` binds a set of `Count` buffer objects whose names are given in the array `Buffers` to the `Count` consecutive binding points starting from index `First` of the array of targets specified by `Target`. If `Buffers` is `?NULL` then `gl:bindBuffersBase/3` unbinds any buffers that are currently bound to the referenced binding points. Assuming no errors are generated, it is equivalent to the following pseudo-code, which calls `gl:bindBufferBase/3`, with the exception that the non-indexed `Target` is not changed by `gl:bindBuffersBase/3`

bindBuffersRange(Target, First, Buffers, Offsets, Sizes)

`gl:bindBuffersRange/5` binds a set of `Count` ranges from buffer objects whose names are given in the array `Buffers` to the `Count` consecutive binding points starting from index `First` of the array of targets specified by `Target`. `Offsets` specifies the address of an array containing `Count` starting offsets within the buffers, and `Sizes` specifies the address of an array of `Count` sizes of the ranges. If `Buffers` is `?NULL` then `Offsets` and `Sizes` are ignored and `gl:bindBuffersRange/5` unbinds any buffers that are currently bound to the referenced binding points. Assuming no errors are generated, it is equivalent to the following pseudo-code, which calls `gl:bindBufferRange/5`, with the exception that the non-indexed `Target` is not changed by `gl:bindBuffersRange/5`

bindFragDataLocation(Program, Color, Name)

`gl:bindFragDataLocation/3` explicitly specifies the binding of the user-defined varying out variable `Name` to fragment shader color number `ColorNumber` for program `Program`. If `Name` was bound previously, its assigned binding is replaced with `ColorNumber`. `Name` must be a null-terminated string. `ColorNumber` must be less than `?GL_MAX_DRAW_BUFFERS`.

bindFragDataLocationIndexed(Program, ColorNumber, Index, Name)

`gl:bindFragDataLocationIndexed/4` specifies that the varying out variable `Name` in `Program` should be bound to fragment color `ColorNumber` when the program is next linked. `Index` may be zero or one to specify that the color be used as either the first or second color input to the blend equation, respectively.

bindFramebuffer(Target, Framebuffer)

`gl:bindFramebuffer/2` binds the framebuffer object with name `Framebuffer` to the framebuffer target specified by `Target`. `Target` must be either `?GL_DRAW_FRAMEBUFFER`, `?GL_READ_FRAMEBUFFER` or `?GL_FRAMEBUFFER`. If a framebuffer object is bound to `?GL_DRAW_FRAMEBUFFER` or `?GL_READ_FRAMEBUFFER`, it becomes the target for rendering or readback operations, respectively, until it is deleted or another framebuffer is bound to the corresponding bind point. Calling `gl:bindFramebuffer/2` with `Target` set to `?GL_FRAMEBUFFER` binds `Framebuffer` to both the read and draw framebuffer targets. `Framebuffer` is the name of a framebuffer object previously returned from a call to `gl:genFramebuffers/1`, or zero to break the existing binding of a framebuffer object to `Target`.

bindImageTexture(Unit, Texture, Level, Layered, Layer, Access, Format)

`gl:bindImageTexture/7` binds a single level of a texture to an image unit for the purpose of reading and writing it from shaders. `Unit` specifies the zero-based index of the image unit to which to bind the texture level. `Texture` specifies the name of an existing texture object to bind to the image unit. If `Texture` is zero, then any existing binding to the image unit is broken. `Level` specifies the level of the texture to bind to the image unit.

bindImageTextures(First, Textures)

`gl:bindImageTextures/2` binds images from an array of existing texture objects to a specified number of consecutive image units. `Count` specifies the number of texture objects whose names are stored in the array `Textures`. That number of texture names are read from the array and bound to the `Count` consecutive texture units starting from `First`. If the name zero appears in the `Textures` array, any existing binding to the image unit is reset. Any non-zero entry in `Textures` must be the name of an existing texture object. When a non-zero entry in `Textures` is present, the image at level zero is bound, the binding is considered layered, with the first layer set to zero, and the image is bound for read-write access. The image unit format parameter is taken from the internal format of the image at level zero of the texture object. For cube map textures, the internal format of the positive X image of level zero is used. If `Textures` is `?NULL` then it is as if an appropriately sized array containing only zeros had been specified.

bindProgramPipeline(Pipeline)

`gl:bindProgramPipeline/1` binds a program pipeline object to the current context. `Pipeline` must be a name previously returned from a call to `gl:genProgramPipelines/1`. If no program pipeline exists with name `Pipeline` then a new pipeline object is created with that name and initialized to the default state vector.

bindRenderbuffer(Target, Renderbuffer)

`gl:bindRenderbuffer/2` binds the renderbuffer object with name `Renderbuffer` to the renderbuffer target specified by `Target`. `Target` must be `?GL_RENDERBUFFER`. `Renderbuffer` is the name of a renderbuffer object previously returned from a call to `gl:genRenderbuffers/1`, or zero to break the existing binding of a renderbuffer object to `Target`.

bindSampler(Unit, Sampler)

`gl:bindSampler/2` binds `Sampler` to the texture unit at index `Unit`. `Sampler` must be zero or the name of a sampler object previously returned from a call to `gl:genSamplers/1`. `Unit` must be less than the value of `?GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS`.

bindSamplers(First, Samplers)

`gl:bindSamplers/2` binds samplers from an array of existing sampler objects to a specified number of consecutive sampler units. `Count` specifies the number of sampler objects whose names are stored in the array `Samplers`. That number of sampler names is read from the array and bound to the `Count` consecutive sampler units starting from `First`.

bindTexture(Target, Texture)

`gl:bindTexture/2` lets you create or use a named texture. Calling `gl:bindTexture/2` with `Target` set to `?GL_TEXTURE_1D`, `?GL_TEXTURE_2D`, `?GL_TEXTURE_3D`, `?GL_TEXTURE_1D_ARRAY`, `?GL_TEXTURE_2D_ARRAY`, `?GL_TEXTURE_RECTANGLE`, `?GL_TEXTURE_CUBE_MAP`, `?GL_TEXTURE_CUBE_MAP_ARRAY`, `?GL_TEXTURE_BUFFER`, `?GL_TEXTURE_2D_MULTISAMPLE` or `?GL_TEXTURE_2D_MULTISAMPLE_ARRAY` and `Texture` set to the name of the new texture binds the texture name to the target. When a texture is bound to a target, the previous binding for that target is automatically broken.

bindTextures(First, Textures)

`gl:bindTextures/2` binds an array of existing texture objects to a specified number of consecutive texture units. `Count` specifies the number of texture objects whose names are stored in the array `Textures`. That number of texture names are read from the array and bound to the `Count` consecutive texture units starting from `First`. The target, or type of texture is deduced from the texture object and each texture is bound to the corresponding target of the texture unit. If the name zero appears in the `Textures` array, any existing binding to any target of the texture unit is reset and the default texture for that target is bound in its place. Any non-zero entry in `Textures` must be the name of an existing texture object. If `Textures` is `?NULL` then it is as if an appropriately sized array containing only zeros had been specified.

bindTextureUnit(Unit, Texture)

`gl:bindTextureUnit/2` binds an existing texture object to the texture unit numbered `Unit`.

bindTransformFeedback(Target, Id)

`gl:bindTransformFeedback/2` binds the transform feedback object with name `Id` to the current GL state. `Id` must be a name previously returned from a call to `gl:genTransformFeedbacks/1`. If `Id` has not previously been bound, a new transform feedback object with name `Id` and initialized with the default transform state vector is created.

bindVertexArray(Array)

`gl:bindVertexArray/1` binds the vertex array object with name `Array`. `Array` is the name of a vertex array object previously returned from a call to `gl:genVertexArrays/1`, or zero to break the existing vertex array object binding.

bindVertexBuffer(Bindingindex, Buffer, Offset, Stride)

Equivalent to `vertexArrayVertexBuffer/5`.

bindVertexBuffers(First, Buffers, Offsets, Strides)

Equivalent to `vertexArrayVertexBuffers/5`.

bitmap(Width, Height, Xorig, Yorig, Xmove, Ymove, Bitmap)

A bitmap is a binary image. When drawn, the bitmap is positioned relative to the current raster position, and frame buffer pixels corresponding to 1's in the bitmap are written using the current raster color or index. Frame buffer pixels corresponding to 0's in the bitmap are not modified.

blendColor(Red, Green, Blue, Alpha)

The `?GL_BLEND_COLOR` may be used to calculate the source and destination blending factors. The color components are clamped to the range [0 1] before being stored. See `gl:blendFunc/2` for a complete description of the blending operations. Initially the `?GL_BLEND_COLOR` is set to (0, 0, 0, 0).

blendEquation(Mode)

Equivalent to `blendEquationi/2`.

blendEquationi(Buf, Mode)

The blend equations determine how a new pixel (the ''source'' color) is combined with a pixel already in the framebuffer (the ''destination'' color). This function sets both the RGB blend equation and the alpha blend equation to a single equation. `gl:blendEquationi/2` specifies the blend equation for a single draw buffer whereas `gl:blendEquation/1` sets the blend equation for all draw buffers.

blendEquationSeparate(ModeRGB, ModeAlpha)

Equivalent to `blendEquationSeparatei/3`.

blendEquationSeparatei(Buf, ModeRGB, ModeAlpha)

The blend equations determines how a new pixel (the ''source'' color) is combined with a pixel already in the framebuffer (the ''destination'' color). These functions specify one blend equation for the RGB-color components and one blend equation for the alpha component. `gl:blendEquationSeparatei/3` specifies the blend equations for a single draw buffer whereas `gl:blendEquationSeparate/2` sets the blend equations for all draw buffers.

blendFunc(Sfactor, Dfactor)

Equivalent to `blendFunci/3`.

blendFunci(Buf, Src, Dst)

Pixels can be drawn using a function that blends the incoming (source) RGBA values with the RGBA values that are already in the frame buffer (the destination values). Blending is initially disabled. Use `gl:enable/1` and `gl:disable/1` with argument `?GL_BLEND` to enable and disable blending.

blendFuncSeparate(SfactorRGB, DfactorRGB, SfactorAlpha, DfactorAlpha)

Equivalent to `blendFuncSeparatei/5`.

blendFuncSeparatei(Buf, SrcRGB, DstRGB, SrcAlpha, DstAlpha)

Pixels can be drawn using a function that blends the incoming (source) RGBA values with the RGBA values that are already in the frame buffer (the destination values). Blending is initially disabled. Use `gl:enable/1` and `gl:disable/1` with argument `?GL_BLEND` to enable and disable blending.

blitFramebuffer(SrcX0, SrcY0, SrcX1, SrcY1, DstX0, DstY0, DstX1, DstY1, Mask, Filter)

`gl:blitFramebuffer/10` and `glBlitNamedFramebuffer` transfer a rectangle of pixel values from one region of a read framebuffer to another region of a draw framebuffer.

bufferData(Target, Size, Data, Usage)

`gl:bufferData/4` and `glNamedBufferData` create a new data store for a buffer object. In case of `gl:bufferData/4`, the buffer object currently bound to `Target` is used. For `glNamedBufferData`, a buffer object associated with ID specified by the caller in `Buffer` will be used instead.

bufferStorage(Target, Size, Data, Flags)

`gl:bufferStorage/4` and `glNamedBufferStorage` create a new immutable data store. For `gl:bufferStorage/4`, the buffer object currently bound to `Target` will be initialized. For `glNamedBufferStorage`, `Buffer` is the name of the buffer object that will be configured. The size of the data store is specified by `Size`. If an initial data is available, its address may be supplied in `Data`. Otherwise, to create an uninitialized data store, `Data` should be `?NULL`.

bufferSubData(Target, Offset, Size, Data)

`gl:bufferSubData/4` and `glNamedBufferSubData` redefine some or all of the data store for the specified buffer object. Data starting at byte offset `Offset` and extending for `Size` bytes is copied to the data store from the memory pointed to by `Data`. `Offset` and `Size` must define a range lying entirely within the buffer object's data store.

callList(List)

`gl:callList/1` causes the named display list to be executed. The commands saved in the display list are executed in order, just as if they were called without using a display list. If `List` has not been defined as a display list, `gl:callList/1` is ignored.

callLists(Lists)

`gl:callLists/1` causes each display list in the list of names passed as `Lists` to be executed. As a result, the commands saved in each display list are executed in order, just as if they were called without using a display list. Names of display lists that have not been defined are ignored.

checkFramebufferStatus(Target)

`gl:checkFramebufferStatus/1` and `glCheckNamedFramebufferStatus` return the completeness status of a framebuffer object when treated as a read or draw framebuffer, depending on the value of `Target`.

clampColor(Target, Clamp)

`gl:clampColor/2` controls color clamping that is performed during `gl:readPixels/7`. `Target` must be `?GL_CLAMP_READ_COLOR`. If `Clamp` is `?GL_TRUE`, read color clamping is enabled; if `Clamp` is `?GL_FALSE`, read color clamping is disabled. If `Clamp` is `?GL_FIXED_ONLY`, read color clamping is enabled only if the selected read buffer has fixed point components and disabled otherwise.

clear(Mask)

`gl:clear/1` sets the bitplane area of the window to values previously selected by `gl:clearColor/4`, `gl:clearDepth/1`, and `gl:clearStencil/1`. Multiple color buffers can be cleared simultaneously by selecting more than one buffer at a time using `gl:drawBuffer/1`.

clearAccum(Red, Green, Blue, Alpha)

`gl:clearAccum/4` specifies the red, green, blue, and alpha values used by `gl:clear/1` to clear the accumulation buffer.

clearBufferData(Target, Internalformat, Format, Type, Data)

Equivalent to `clearBufferuiv/3`.

clearBufferfi(Buffer, Drawbuffer, Depth, Stencil)

Equivalent to `clearBufferuiv/3`.

clearBufferfv(Buffer, Drawbuffer, Value)

Equivalent to `clearBufferuiv/3`.

clearBufferiv(Buffer, Drawbuffer, Value)

Equivalent to `clearBufferuiv/3`.

clearBufferSubData(Target, Internalformat, Offset, Size, Format, Type, Data)

Equivalent to `clearBufferuiv/3`.

clearBufferuiv(Buffer, Drawbuffer, Value)

These commands clear a specified buffer of a framebuffer to specified value(s). For `gl:clearBuffer*()`, the framebuffer is the currently bound draw framebuffer object. For `glClearNamedFramebuffer*`, `Framebuffer` is zero, indicating the default draw framebuffer, or the name of a framebuffer object.

clearColor(Red, Green, Blue, Alpha)

`gl:clearColor/4` specifies the red, green, blue, and alpha values used by `gl:clear/1` to clear the color buffers. Values specified by `gl:clearColor/4` are clamped to the range [0 1].

clearDepth(Depth)

Equivalent to `clearDepthf/1`.

clearDepthf(D)

`gl:clearDepth/1` specifies the depth value used by `gl:clear/1` to clear the depth buffer. Values specified by `gl:clearDepth/1` are clamped to the range [0 1].

clearIndex(C)

`gl:clearIndex/1` specifies the index used by `gl:clear/1` to clear the color index buffers. `C` is not clamped. Rather, `C` is converted to a fixed-point value with unspecified precision to the right of the binary point. The integer part of this value is then masked with 2 m-1, where m is the number of bits in a color index stored in the frame buffer.

clearStencil(S)

`gl:clearStencil/1` specifies the index used by `gl:clear/1` to clear the stencil buffer. `S` is masked with 2 m-1, where m is the number of bits in the stencil buffer.

clearTexImage(Texture, Level, Format, Type, Data)

`gl:clearTexImage/5` fills all an image contained in a texture with an application supplied value. `Texture` must be the name of an existing texture. Further, `Texture` may not be the name of a buffer texture, nor may its internal format be compressed.

clearTexSubImage(Texture, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth, Format, Type, Data)

`gl:clearTexSubImage/11` fills all or part of an image contained in a texture with an application supplied value. `Texture` must be the name of an existing texture. Further, `Texture` may not be the name of a buffer texture, nor may its internal format be compressed.

clientActiveTexture(Texture)

`gl:clientActiveTexture/1` selects the vertex array client state parameters to be modified by `gl:texCoordPointer/4`, and enabled or disabled with `gl:enableClientState/1` or `gl:disableClientState/1`, respectively, when called with a parameter of `?GL_TEXTURE_COORD_ARRAY`.

clientWaitSync(Sync, Flags, Timeout)

`gl:clientWaitSync/3` causes the client to block and wait for the sync object specified by `Sync` to become signaled. If `Sync` is signaled when `gl:clientWaitSync/3` is called, `gl:clientWaitSync/3` returns immediately, otherwise it will block and wait for up to `Timeout` nanoseconds for `Sync` to become signaled.

clipControl(Origin, Depth)

`gl:clipControl/2` controls the clipping volume behavior and the clip coordinate to window coordinate transformation behavior.

clipPlane(Plane, Equation)

Geometry is always clipped against the boundaries of a six-plane frustum in `x`, `y`, and `z`. `gl:clipPlane/2` allows the specification of additional planes, not necessarily perpendicular to the `x`, `y`, or `z` axis, against which all geometry is clipped. To determine the maximum number of additional clipping planes, call `gl:getIntegerv/1` with argument `?GL_MAX_CLIP_PLANES`. All implementations support at least six such clipping planes. Because the resulting clipping region is the intersection of the defined half-spaces, it is always convex.

color3b(Red, Green, Blue)

Equivalent to `color4usv/1`.

color3bv/1

Equivalent to `color4usv/1`.

color3d(Red, Green, Blue)

Equivalent to `color4usv/1`.

color3dv/1

Equivalent to `color4usv/1`.

color3f(Red, Green, Blue)

Equivalent to `color4usv/1`.

color3fv/1

Equivalent to `color4usv/1`.

color3i(Red, Green, Blue)

Equivalent to `color4usv/1`.

color3iv/1

Equivalent to `color4usv/1`.

color3s(Red, Green, Blue)

Equivalent to `color4usv/1`.

color3sv/1

Equivalent to `color4usv/1`.

color3ub(Red, Green, Blue)

Equivalent to `color4usv/1`.

color3ubv/1

Equivalent to `color4usv/1`.

color3ui(Red, Green, Blue)

Equivalent to `color4usv/1`.

color3uiv/1

Equivalent to `color4usv/1`.

color3us(Red, Green, Blue)

Equivalent to `color4usv/1`.

color3usv/1

Equivalent to `color4usv/1`.

color4b(Red, Green, Blue, Alpha)

Equivalent to `color4usv/1`.

color4bv/1

Equivalent to `color4usv/1`.

color4d(Red, Green, Blue, Alpha)

Equivalent to `color4usv/1`.

color4dv/1

Equivalent to `color4usv/1`.

color4f(Red, Green, Blue, Alpha)

Equivalent to `color4usv/1`.

color4fv/1

Equivalent to `color4usv/1`.

color4i(Red, Green, Blue, Alpha)

Equivalent to `color4usv/1`.

color4iv/1

Equivalent to `color4usv/1`.

color4s(Red, Green, Blue, Alpha)

Equivalent to `color4usv/1`.

color4sv/1

Equivalent to `color4usv/1`.

color4ub(Red, Green, Blue, Alpha)

Equivalent to `color4usv/1`.

color4ubv/1

Equivalent to `color4usv/1`.

color4ui(Red, Green, Blue, Alpha)

Equivalent to `color4usv/1`.

color4uiv/1

Equivalent to `color4usv/1`.

color4us(Red, Green, Blue, Alpha)

Equivalent to `color4usv/1`.

color4usv/1

The GL stores both a current single-valued color index and a current four-valued RGBA color. `gl:color()` sets a new four-valued RGBA color. `gl:color()` has two major variants: `gl:color3()` and `gl:color4()`. `gl:color3()` variants specify new red, green, and blue values explicitly and set the current alpha value to 1.0 (full intensity) implicitly. `gl:color4()` variants specify all four color components explicitly.

colorMask(Red, Green, Blue, Alpha)

Equivalent to `colorMaski/5`.

colorMaski(Index, R, G, B, A)

`gl:colorMask/4` and `gl:colorMaski/5` specify whether the individual color components in the frame buffer can or cannot be written. `gl:colorMaski/5` sets the mask for a specific draw buffer, whereas `gl:colorMask/4` sets the mask for all draw buffers. If `Red` is `?GL_FALSE`, for example, no change is made to the red component of any pixel in any of the color buffers, regardless of the drawing operation attempted.

colorMaterial(Face, Mode)

`gl:colorMaterial/2` specifies which material parameters track the current color. When `?GL_COLOR_MATERIAL` is enabled, the material parameter or parameters specified by `Mode`, of the material or materials specified by `Face`, track the current color at all times.

colorPointer(Size, Type, Stride, Ptr)

`gl:colorPointer/4` specifies the location and data format of an array of color components to use when rendering. `Size` specifies the number of components per color, and must be 3 or 4. `Type` specifies the data type of each color component, and `Stride` specifies the byte stride from one color to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays. (Single-array storage may be more efficient on some implementations; see `gl:interleavedArrays/3`.)

colorSubTable(Target, Start, Count, Format, Type, Data)

`gl:colorSubTable/6` is used to respecify a contiguous portion of a color table previously defined using `gl:colorTable/6`. The pixels referenced by `Data` replace the portion of the existing table from indices `Start` to start+count-1, inclusive. This region may not include any entries outside the range of the color table as it was originally specified. It is not an error to specify a subtexture with width of 0, but such a specification has no effect.

colorTable(Target, Internalformat, Width, Format, Type, Table)

`gl:colorTable/6` may be used in two ways: to test the actual size and color resolution of a lookup table given a particular set of parameters, or to load the contents of a color lookup table. Use the targets `?GL_PROXY_*` for the first case and the other targets for the second case.

colorTableParameterfv(Target, Pname, Params)

Equivalent to `colorTableParameteriv/3`.

colorTableParameteriv(Target, Pname, Params)

`gl:colorTableParameter()` is used to specify the scale factors and bias terms applied to color components when they are loaded into a color table. `Target` indicates which color table the scale and bias terms apply to; it must be set to `?GL_COLOR_TABLE`, `?GL_POST_CONVOLUTION_COLOR_TABLE`, or `?GL_POST_COLOR_MATRIX_COLOR_TABLE`.

compileShader(Shader)

`gl:compileShader/1` compiles the source code strings that have been stored in the shader object specified by `Shader`.

compressedTexImage1D(Target, Level, Internalformat, Width, Border, ImageSize, Data)

Texturing allows elements of an image array to be read by shaders.

compressedTexImage2D(Target, Level, Internalformat, Width, Height, Border, ImageSize, Data)

Texturing allows elements of an image array to be read by shaders.

compressedTexImage3D(Target, Level, Internalformat, Width, Height, Depth, Border, ImageSize, Data)

Texturing allows elements of an image array to be read by shaders.

compressedTexSubImage1D(Target, Level, Xoffset, Width, Format, ImageSize, Data)

Equivalent to `compressedTextureSubImage1D/7`.

compressedTexSubImage2D(Target, Level, Xoffset, Yoffset, Width, Height, Format, ImageSize, Data)

Equivalent to `compressedTextureSubImage2D/9`.

compressedTexSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth, Format, ImageSize, Data)

Equivalent to `compressedTextureSubImage3D/11`.

compressedTextureSubImage1D(Texture, Level, Xoffset, Width, Format, ImageSize, Data)

Texturing allows elements of an image array to be read by shaders.

compressedTextureSubImage2D(Texture, Level, Xoffset, Yoffset, Width, Height, Format, ImageSize, Data)

Texturing allows elements of an image array to be read by shaders.

compressedTextureSubImage3D(Texture, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth, Format, ImageSize, Data)

Texturing allows elements of an image array to be read by shaders.

convolutionFilter1D(Target, Internalformat, Width, Format, Type, Image)

`gl:convolutionFilter1D/6` builds a one-dimensional convolution filter kernel from an array of pixels.

convolutionFilter2D(Target, Internalformat, Width, Height, Format, Type, Image)

`gl:convolutionFilter2D/7` builds a two-dimensional convolution filter kernel from an array of pixels.

convolutionParameterf(Target, Pname, Params)

Equivalent to `convolutionParameteriv/3`.

convolutionParameterfv(Target, Pname, Params)

Equivalent to `convolutionParameteriv/3`.

convolutionParameteri(Target, Pname, Params)

Equivalent to `convolutionParameteriv/3`.

convolutionParameteriv(Target, Pname, Params)

`gl:convolutionParameter()` sets the value of a convolution parameter.

copyBufferSubData(ReadTarget, WriteTarget, ReadOffset, WriteOffset, Size)

`gl:copyBufferSubData/5` and `glCopyNamedBufferSubData` copy part of the data store attached to a source buffer object to the data store attached to a destination buffer object. The number of basic machine units indicated by `Size` is copied from the source at offset `ReadOffset` to the destination at `WriteOffset`. `ReadOffset`, `WriteOffset` and `Size` are in terms of basic machine units.

copyColorSubTable(Target, Start, X, Y, Width)

`gl:copyColorSubTable/5` is used to respecify a contiguous portion of a color table previously defined using `gl:colorTable/6`. The pixels copied from the framebuffer replace the portion of the existing table from indices `Start` to start+x-1, inclusive. This region may not include any entries outside the range of the color table, as was originally specified. It is not an error to specify a subtexture with width of 0, but such a specification has no effect.

copyColorTable(Target, Internalformat, X, Y, Width)

`gl:copyColorTable/5` loads a color table with pixels from the current `?GL_READ_BUFFER` (rather than from main memory, as is the case for `gl:colorTable/6`).

copyConvolutionFilter1D(Target, Internalformat, X, Y, Width)

`gl:copyConvolutionFilter1D/5` defines a one-dimensional convolution filter kernel with pixels from the current `?GL_READ_BUFFER` (rather than from main memory, as is the case for `gl:convolutionFilter1D/6`).

copyConvolutionFilter2D(Target, Internalformat, X, Y, Width, Height)

`gl:copyConvolutionFilter2D/6` defines a two-dimensional convolution filter kernel with pixels from the current `?GL_READ_BUFFER` (rather than from main memory, as is the case for `gl:convolutionFilter2D/7`).

copyImageSubData(SrcName, SrcTarget, SrcLevel, SrcX, SrcY, SrcZ, DstName, DstTarget, DstLevel, DstX, DstY, DstZ, SrcWidth, SrcHeight, SrcDepth)

`gl:copyImageSubData/15` may be used to copy data from one image (i.e. texture or renderbuffer) to another. `gl:copyImageSubData/15` does not perform general-purpose conversions such as scaling, resizing, blending, color-space, or format conversions. It should be considered to operate in a manner similar to a CPU memcpy. CopyImageSubData can copy between images with different internal formats, provided the formats are compatible.

copyPixels(X, Y, Width, Height, Type)

`gl:copyPixels/5` copies a screen-aligned rectangle of pixels from the specified frame buffer location to a region relative to the current raster position. Its operation is well defined only if the entire pixel source region is within the exposed portion of the window. Results of copies from outside the window, or from regions of the window that are not exposed, are hardware dependent and undefined.

copyTexImage1D(Target, Level, Internalformat, X, Y, Width, Border)

`gl:copyTexImage1D/7` defines a one-dimensional texture image with pixels from the current `?GL_READ_BUFFER`.

copyTexImage2D(Target, Level, Internalformat, X, Y, Width, Height, Border)

`gl:copyTexImage2D/8` defines a two-dimensional texture image, or cube-map texture image with pixels from the current `?GL_READ_BUFFER`.

copyTexSubImage1D(Target, Level, Xoffset, X, Y, Width)

`gl:copyTexSubImage1D/6` and `glCopyTextureSubImage1D` replace a portion of a one-dimensional texture image with pixels from the current `?GL_READ_BUFFER` (rather than from main memory, as is the case for `gl:texSubImage1D/7`). For `gl:copyTexSubImage1D/6`, the texture object that is bound to `Target` will be used for the process. For `glCopyTextureSubImage1D`, `Texture` tells which texture object should be used for the purpose of the call.

copyTexSubImage2D(Target, Level, Xoffset, Yoffset, X, Y, Width, Height)

`gl:copyTexSubImage2D/8` and `glCopyTextureSubImage2D` replace a rectangular portion of a two-dimensional texture image, cube-map texture image, rectangular image, or a linear portion of a number of slices of a one-dimensional array texture with pixels from the current `?GL_READ_BUFFER` (rather than from main memory, as is the case for `gl:texSubImage2D/9`).

copyTexSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset, X, Y, Width, Height)

`gl:copyTexSubImage3D/9` and `glCopyTextureSubImage3D` functions replace a rectangular portion of a three-dimensional or two-dimensional array texture image with pixels from the current `?GL_READ_BUFFER` (rather than from main memory, as is the case for `gl:texSubImage3D/11`).

createBuffers(N)

`gl:createBuffers/1` returns `N` previously unused buffer names in `Buffers`, each representing a new buffer object initialized as if it had been bound to an unspecified target.

createFramebuffers(N)

`gl:createFramebuffers/1` returns `N` previously unused framebuffer names in `Framebuffers`, each representing a new framebuffer object initialized to the default state.

createProgram()

`gl:createProgram/0` creates an empty program object and returns a non-zero value by which it can be referenced. A program object is an object to which shader objects can be attached. This provides a mechanism to specify the shader objects that will be linked to create a program. It also provides a means for checking the compatibility of the shaders that will be used to create a program (for instance, checking the compatibility between a vertex shader and a fragment shader). When no longer needed as part of a program object, shader objects can be detached.

createProgramPipelines(N)

`gl:createProgramPipelines/1` returns `N` previously unused program pipeline names in `Pipelines`, each representing a new program pipeline object initialized to the default state.

createQueries(Target, N)

`gl:createQueries/2` returns `N` previously unused query object names in `Ids`, each representing a new query object with the specified `Target`.

createRenderbuffers(N)

`gl:createRenderbuffers/1` returns `N` previously unused renderbuffer object names in `Renderbuffers`, each representing a new renderbuffer object initialized to the default state.

createSamplers(N)

`gl:createSamplers/1` returns `N` previously unused sampler names in `Samplers`, each representing a new sampler object initialized to the default state.

createShader(Type)

`gl:createShader/1` creates an empty shader object and returns a non-zero value by which it can be referenced. A shader object is used to maintain the source code strings that define a shader. `ShaderType` indicates the type of shader to be created. Five types of shader are supported. A shader of type `?GL_COMPUTE_SHADER` is a shader that is intended to run on the programmable compute processor. A shader of type `?GL_VERTEX_SHADER` is a shader that is intended to run on the programmable vertex processor. A shader of type `?GL_TESS_CONTROL_SHADER` is a shader that is intended to run on the programmable tessellation processor in the control stage. A shader of type `?GL_TESS_EVALUATION_SHADER` is a shader that is intended to run on the programmable tessellation processor in the evaluation stage. A shader of type `?GL_GEOMETRY_SHADER` is a shader that is intended to run on the programmable geometry processor. A shader of type `?GL_FRAGMENT_SHADER` is a shader that is intended to run on the programmable fragment processor.

createShaderProgramv(Type, Strings)

`gl:createShaderProgram()` creates a program object containing compiled and linked shaders for a single stage specified by `Type`. `Strings` refers to an array of `Count` strings from which to create the shader executables.

createTextures(Target, N)

`gl:createTextures/2` returns `N` previously unused texture names in `Textures`, each representing a new texture object of the dimensionality and type specified by `Target` and initialized to the default values for that texture type.

createTransformFeedbacks(N)

`gl:createTransformFeedbacks/1` returns `N` previously unused transform feedback object names in `Ids`, each representing a new transform feedback object initialized to the default state.

createVertexArrays(N)

`gl:createVertexArrays/1` returns `N` previously unused vertex array object names in `Arrays`, each representing a new vertex array object initialized to the default state.

cullFace(Mode)

`gl:cullFace/1` specifies whether front- or back-facing facets are culled (as specified by `mode`) when facet culling is enabled. Facet culling is initially disabled. To enable and disable facet culling, call the `gl:enable/1` and `gl:disable/1` commands with the argument `?GL_CULL_FACE`. Facets include triangles, quadrilaterals, polygons, and rectangles.

debugMessageControl(Source, Type, Severity, Ids, Enabled)

`gl:debugMessageControl/5` controls the reporting of debug messages generated by a debug context. The parameters `Source`, `Type` and `Severity` form a filter to select messages from the pool of potential messages generated by the GL.

debugMessageInsert(Source, Type, Id, Severity, Buf)

`gl:debugMessageInsert/5` inserts a user-supplied message into the debug output queue. `Source` specifies the source that will be used to classify the message and must be `?GL_DEBUG_SOURCE_APPLICATION` or `?GL_DEBUG_SOURCE_THIRD_PARTY`. All other sources are reserved for use by the GL implementation. `Type` indicates the type of the message to be inserted and may be one of `?GL_DEBUG_TYPE_ERROR`, `?GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR`, `?GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR`, `?GL_DEBUG_TYPE_PORTABILITY`, `?GL_DEBUG_TYPE_PERFORMANCE`, `?GL_DEBUG_TYPE_MARKER`, `?GL_DEBUG_TYPE_PUSH_GROUP`, `?GL_DEBUG_TYPE_POP_GROUP`, or `?GL_DEBUG_TYPE_OTHER`. `Severity` indicates the severity of the message and may be `?GL_DEBUG_SEVERITY_LOW`, `?GL_DEBUG_SEVERITY_MEDIUM`, `?GL_DEBUG_SEVERITY_HIGH` or `?GL_DEBUG_SEVERITY_NOTIFICATION`. `Id` is available for application defined use and may be any value. This value will be recorded and used to identify the message.

deleteBuffers(Buffers)

`gl:deleteBuffers/1` deletes `N` buffer objects named by the elements of the array `Buffers`. After a buffer object is deleted, it has no contents, and its name is free for reuse (for example by `gl:genBuffers/1`). If a buffer object that is currently bound is deleted, the binding reverts to 0 (the absence of any buffer object).

deleteFramebuffers(Framebuffers)

`gl:deleteFramebuffers/1` deletes the `N` framebuffer objects whose names are stored in the array addressed by `Framebuffers`. The name zero is reserved by the GL and is silently ignored, should it occur in `Framebuffers`, as are other unused names. Once a framebuffer object is deleted, its name is again unused and it has no attachments. If a framebuffer that is currently bound to one or more of the targets `?GL_DRAW_FRAMEBUFFER` or `?GL_READ_FRAMEBUFFER` is deleted, it is as though `gl:bindFramebuffer/2` had been executed with the corresponding `Target` and `Framebuffer` zero.

deleteLists(List, Range)

`gl:deleteLists/2` causes a contiguous group of display lists to be deleted. `List` is the name of the first display list to be deleted, and `Range` is the number of display lists to delete. All display lists d with list&lt;= d&lt;= list+range-1 are deleted.

deleteProgram(Program)

`gl:deleteProgram/1` frees the memory and invalidates the name associated with the program object specified by `Program.` This command effectively undoes the effects of a call to `gl:createProgram/0`.

deleteProgramPipelines(Pipelines)

`gl:deleteProgramPipelines/1` deletes the `N` program pipeline objects whose names are stored in the array `Pipelines`. Unused names in `Pipelines` are ignored, as is the name zero. After a program pipeline object is deleted, its name is again unused and it has no contents. If program pipeline object that is currently bound is deleted, the binding for that object reverts to zero and no program pipeline object becomes current.

deleteQueries(Ids)

`gl:deleteQueries/1` deletes `N` query objects named by the elements of the array `Ids`. After a query object is deleted, it has no contents, and its name is free for reuse (for example by `gl:genQueries/1`).

deleteRenderbuffers(Renderbuffers)

`gl:deleteRenderbuffers/1` deletes the `N` renderbuffer objects whose names are stored in the array addressed by `Renderbuffers`. The name zero is reserved by the GL and is silently ignored, should it occur in `Renderbuffers`, as are other unused names. Once a renderbuffer object is deleted, its name is again unused and it has no contents. If a renderbuffer that is currently bound to the target `?GL_RENDERBUFFER` is deleted, it is as though `gl:bindRenderbuffer/2` had been executed with a `Target` of `?GL_RENDERBUFFER` and a `Name` of zero.

deleteSamplers(Samplers)

`gl:deleteSamplers/1` deletes `N` sampler objects named by the elements of the array `Samplers`. After a sampler object is deleted, its name is again unused. If a sampler object that is currently bound to a sampler unit is deleted, it is as though `gl:bindSampler/2` is called with unit set to the unit the sampler is bound to and sampler zero. Unused names in samplers are silently ignored, as is the reserved name zero.

deleteShader(Shader)

`gl:deleteShader/1` frees the memory and invalidates the name associated with the shader object specified by `Shader`. This command effectively undoes the effects of a call to `gl:createShader/1`.

deleteSync(Sync)

`gl:deleteSync/1` deletes the sync object specified by `Sync`. If the fence command corresponding to the specified sync object has completed, or if no `gl:waitSync/3` or `gl:clientWaitSync/3` commands are blocking on `Sync`, the object is deleted immediately. Otherwise, `Sync` is flagged for deletion and will be deleted when it is no longer associated with any fence command and is no longer blocking any `gl:waitSync/3` or `gl:clientWaitSync/3` command. In either case, after `gl:deleteSync/1` returns, the name `Sync` is invalid and can no longer be used to refer to the sync object.

deleteTextures(Textures)

`gl:deleteTextures/1` deletes `N` textures named by the elements of the array `Textures`. After a texture is deleted, it has no contents or dimensionality, and its name is free for reuse (for example by `gl:genTextures/1`). If a texture that is currently bound is deleted, the binding reverts to 0 (the default texture).

deleteTransformFeedbacks(Ids)

`gl:deleteTransformFeedbacks/1` deletes the `N` transform feedback objects whose names are stored in the array `Ids`. Unused names in `Ids` are ignored, as is the name zero. After a transform feedback object is deleted, its name is again unused and it has no contents. If an active transform feedback object is deleted, its name immediately becomes unused, but the underlying object is not deleted until it is no longer active.

deleteVertexArrays(Arrays)

`gl:deleteVertexArrays/1` deletes `N` vertex array objects whose names are stored in the array addressed by `Arrays`. Once a vertex array object is deleted it has no contents and its name is again unused. If a vertex array object that is currently bound is deleted, the binding for that object reverts to zero and the default vertex array becomes current. Unused names in `Arrays` are silently ignored, as is the value zero.

depthFunc(Func)

`gl:depthFunc/1` specifies the function used to compare each incoming pixel depth value with the depth value present in the depth buffer. The comparison is performed only if depth testing is enabled. (See `gl:enable/1` and `gl:disable/1` of `?GL_DEPTH_TEST`.)

depthMask(Flag)

`gl:depthMask/1` specifies whether the depth buffer is enabled for writing. If `Flag` is `?GL_FALSE`, depth buffer writing is disabled. Otherwise, it is enabled. Initially, depth buffer writing is enabled.

depthRange(Near_val, Far_val)

Equivalent to `depthRangef/2`.

depthRangeArrayv(First, V)

After clipping and division by `w`, depth coordinates range from -1 to 1, corresponding to the near and far clipping planes. Each viewport has an independent depth range specified as a linear mapping of the normalized depth coordinates in this range to window depth coordinates. Regardless of the actual depth buffer implementation, window coordinate depth values are treated as though they range from 0 through 1 (like color components). `gl:depthRangeArray()` specifies a linear mapping of the normalized depth coordinates in this range to window depth coordinates for each viewport in the range [`First`, `First` + `Count`). Thus, the values accepted by `gl:depthRangeArray()` are both clamped to this range before they are accepted.

depthRangef(N, F)

After clipping and division by `w`, depth coordinates range from -1 to 1, corresponding to the near and far clipping planes. `gl:depthRange/2` specifies a linear mapping of the normalized depth coordinates in this range to window depth coordinates. Regardless of the actual depth buffer implementation, window coordinate depth values are treated as though they range from 0 through 1 (like color components). Thus, the values accepted by `gl:depthRange/2` are both clamped to this range before they are accepted.

depthRangeIndexed(Index, N, F)

After clipping and division by `w`, depth coordinates range from -1 to 1, corresponding to the near and far clipping planes. Each viewport has an independent depth range specified as a linear mapping of the normalized depth coordinates in this range to window depth coordinates. Regardless of the actual depth buffer implementation, window coordinate depth values are treated as though they range from 0 through 1 (like color components). `gl:depthRangeIndexed/3` specifies a linear mapping of the normalized depth coordinates in this range to window depth coordinates for a specified viewport. Thus, the values accepted by `gl:depthRangeIndexed/3` are both clamped to this range before they are accepted.

detachShader(Program, Shader)

`gl:detachShader/2` detaches the shader object specified by `Shader` from the program object specified by `Program`. This command can be used to undo the effect of the command `gl:attachShader/2`.

disable(Cap)

Equivalent to `enablei/2`.

disableClientState(Cap)

Equivalent to `enableClientState/1`.

disablei(Target, Index)

Equivalent to `enablei/2`.

disableVertexArrayAttrib(Vaobj, Index)

Equivalent to `enableVertexAttribArray/1`.

disableVertexAttribArray(Index)

Equivalent to `enableVertexAttribArray/1`.

dispatchCompute(Num_groups_x, Num_groups_y, Num_groups_z)

`gl:dispatchCompute/3` launches one or more compute work groups. Each work group is processed by the active program object for the compute shader stage. While the individual shader invocations within a work group are executed as a unit, work groups are executed completely independently and in unspecified order. `Num_groups_x`, `Num_groups_y` and `Num_groups_z` specify the number of local work groups that will be dispatched in the X, Y and Z dimensions, respectively.

dispatchComputeIndirect(Indirect)

`gl:dispatchComputeIndirect/1` launches one or more compute work groups using parameters stored in the buffer object currently bound to the `?GL_DISPATCH_INDIRECT_BUFFER` target. Each work group is processed by the active program object for the compute shader stage. While the individual shader invocations within a work group are executed as a unit, work groups are executed completely independently and in unspecified order. `Indirect` contains the offset into the data store of the buffer object bound to the `?GL_DISPATCH_INDIRECT_BUFFER` target at which the parameters are stored.

drawArrays(Mode, First, Count)

`gl:drawArrays/3` specifies multiple geometric primitives with very few subroutine calls. Instead of calling a GL procedure to pass each individual vertex, normal, texture coordinate, edge flag, or color, you can prespecify separate arrays of vertices, normals, and colors and use them to construct a sequence of primitives with a single call to `gl:drawArrays/3`.

drawArraysIndirect(Mode, Indirect)

`gl:drawArraysIndirect/2` specifies multiple geometric primitives with very few subroutine calls. `gl:drawArraysIndirect/2` behaves similarly to `gl:drawArraysInstancedBaseInstance/5`, execept that the parameters to `gl:drawArraysInstancedBaseInstance/5` are stored in memory at the address given by `Indirect`.

drawArraysInstanced(Mode, First, Count, Instancecount)

`gl:drawArraysInstanced/4` behaves identically to `gl:drawArrays/3` except that `Instancecount` instances of the range of elements are executed and the value of the internal counter `InstanceID` advances for each iteration. `InstanceID` is an internal 32-bit integer counter that may be read by a vertex shader as `?gl_InstanceID`.

drawArraysInstancedBaseInstance(Mode, First, Count, Instancecount, Baseinstance)

`gl:drawArraysInstancedBaseInstance/5` behaves identically to `gl:drawArrays/3` except that `Instancecount` instances of the range of elements are executed and the value of the internal counter `InstanceID` advances for each iteration. `InstanceID` is an internal 32-bit integer counter that may be read by a vertex shader as `?gl_InstanceID`.

drawBuffer(Mode)

When colors are written to the frame buffer, they are written into the color buffers specified by `gl:drawBuffer/1`. One of the following values can be used for default framebuffer

drawBuffers(Bufs)

`gl:drawBuffers/1` and `glNamedFramebufferDrawBuffers` define an array of buffers into which outputs from the fragment shader data will be written. If a fragment shader writes a value to one or more user defined output variables, then the value of each variable will be written into the buffer specified at a location within `Bufs` corresponding to the location assigned to that user defined output. The draw buffer used for user defined outputs assigned to locations greater than or equal to `N` is implicitly set to `?GL_NONE` and any data written to such an output is discarded.

drawElements(Mode, Count, Type, Indices)

`gl:drawElements/4` specifies multiple geometric primitives with very few subroutine calls. Instead of calling a GL function to pass each individual vertex, normal, texture coordinate, edge flag, or color, you can prespecify separate arrays of vertices, normals, and so on, and use them to construct a sequence of primitives with a single call to `gl:drawElements/4`.

drawElementsBaseVertex(Mode, Count, Type, Indices, Basevertex)

`gl:drawElementsBaseVertex/5` behaves identically to `gl:drawElements/4` except that the `i`th element transferred by the corresponding draw call will be taken from element `Indices`[i] + `Basevertex` of each enabled array. If the resulting value is larger than the maximum value representable by `Type`, it is as if the calculation were upconverted to 32-bit unsigned integers (with wrapping on overflow conditions). The operation is undefined if the sum would be negative.

drawElementsIndirect(Mode, Type, Indirect)

`gl:drawElementsIndirect/3` specifies multiple indexed geometric primitives with very few subroutine calls. `gl:drawElementsIndirect/3` behaves similarly to `gl:drawElementsInstancedBaseVertexBaseInstance/7`, execpt that the parameters to `gl:drawElementsInstancedBaseVertexBaseInstance/7` are stored in memory at the address given by `Indirect`.

drawElementsInstanced(Mode, Count, Type, Indices, Instancecount)

`gl:drawElementsInstanced/5` behaves identically to `gl:drawElements/4` except that `Instancecount` instances of the set of elements are executed and the value of the internal counter `InstanceID` advances for each iteration. `InstanceID` is an internal 32-bit integer counter that may be read by a vertex shader as `?gl_InstanceID`.

drawElementsInstancedBaseInstance(Mode, Count, Type, Indices, Instancecount, Baseinstance)

`gl:drawElementsInstancedBaseInstance/6` behaves identically to `gl:drawElements/4` except that `Instancecount` instances of the set of elements are executed and the value of the internal counter `InstanceID` advances for each iteration. `InstanceID` is an internal 32-bit integer counter that may be read by a vertex shader as `?gl_InstanceID`.

drawElementsInstancedBaseVertex(Mode, Count, Type, Indices, Instancecount, Basevertex)

`gl:drawElementsInstancedBaseVertex/6` behaves identically to `gl:drawElementsInstanced/5` except that the `i`th element transferred by the corresponding draw call will be taken from element `Indices`[i] + `Basevertex` of each enabled array. If the resulting value is larger than the maximum value representable by `Type`, it is as if the calculation were upconverted to 32-bit unsigned integers (with wrapping on overflow conditions). The operation is undefined if the sum would be negative.

drawElementsInstancedBaseVertexBaseInstance(Mode, Count, Type, Indices, Instancecount, Basevertex, Baseinstance)

`gl:drawElementsInstancedBaseVertexBaseInstance/7` behaves identically to `gl:drawElementsInstanced/5` except that the `i`th element transferred by the corresponding draw call will be taken from element `Indices`[i] + `Basevertex` of each enabled array. If the resulting value is larger than the maximum value representable by `Type`, it is as if the calculation were upconverted to 32-bit unsigned integers (with wrapping on overflow conditions). The operation is undefined if the sum would be negative.

drawPixels(Width, Height, Format, Type, Pixels)

`gl:drawPixels/5` reads pixel data from memory and writes it into the frame buffer relative to the current raster position, provided that the raster position is valid. Use `gl:rasterPos()` or `gl:windowPos()` to set the current raster position; use `gl:get()` with argument `?GL_CURRENT_RASTER_POSITION_VALID` to determine if the specified raster position is valid, and `gl:get()` with argument `?GL_CURRENT_RASTER_POSITION` to query the raster position.

drawRangeElements(Mode, Start, End, Count, Type, Indices)

`gl:drawRangeElements/6` is a restricted form of `gl:drawElements/4`. `Mode`, and `Count` match the corresponding arguments to `gl:drawElements/4`, with the additional constraint that all values in the arrays `Count` must lie between `Start` and `End`, inclusive.

drawRangeElementsBaseVertex(Mode, Start, End, Count, Type, Indices, Basevertex)

`gl:drawRangeElementsBaseVertex/7` is a restricted form of `gl:drawElementsBaseVertex/5`. `Mode`, `Count` and `Basevertex` match the corresponding arguments to `gl:drawElementsBaseVertex/5`, with the additional constraint that all values in the array `Indices` must lie between `Start` and `End`, inclusive, prior to adding `Basevertex`. Index values lying outside the range [`Start`, `End`] are treated in the same way as `gl:drawElementsBaseVertex/5`. The `i`th element transferred by the corresponding draw call will be taken from element `Indices`[i] + `Basevertex` of each enabled array. If the resulting value is larger than the maximum value representable by `Type`, it is as if the calculation were upconverted to 32-bit unsigned integers (with wrapping on overflow conditions). The operation is undefined if the sum would be negative.

drawTransformFeedback(Mode, Id)

`gl:drawTransformFeedback/2` draws primitives of a type specified by `Mode` using a count retrieved from the transform feedback specified by `Id`. Calling `gl:drawTransformFeedback/2` is equivalent to calling `gl:drawArrays/3` with `Mode` as specified, `First` set to zero, and `Count` set to the number of vertices captured on vertex stream zero the last time transform feedback was active on the transform feedback object named by `Id`.

drawTransformFeedbackInstanced(Mode, Id, Instancecount)

`gl:drawTransformFeedbackInstanced/3` draws multiple copies of a range of primitives of a type specified by `Mode` using a count retrieved from the transform feedback stream specified by `Stream` of the transform feedback object specified by `Id`. Calling `gl:drawTransformFeedbackInstanced/3` is equivalent to calling `gl:drawArraysInstanced/4` with `Mode` and `Instancecount` as specified, `First` set to zero, and `Count` set to the number of vertices captured on vertex stream zero the last time transform feedback was active on the transform feedback object named by `Id`.

drawTransformFeedbackStream(Mode, Id, Stream)

`gl:drawTransformFeedbackStream/3` draws primitives of a type specified by `Mode` using a count retrieved from the transform feedback stream specified by `Stream` of the transform feedback object specified by `Id`. Calling `gl:drawTransformFeedbackStream/3` is equivalent to calling `gl:drawArrays/3` with `Mode` as specified, `First` set to zero, and `Count` set to the number of vertices captured on vertex stream `Stream` the last time transform feedback was active on the transform feedback object named by `Id`.

drawTransformFeedbackStreamInstanced(Mode, Id, Stream, Instancecount)

`gl:drawTransformFeedbackStreamInstanced/4` draws multiple copies of a range of primitives of a type specified by `Mode` using a count retrieved from the transform feedback stream specified by `Stream` of the transform feedback object specified by `Id`. Calling `gl:drawTransformFeedbackStreamInstanced/4` is equivalent to calling `gl:drawArraysInstanced/4` with `Mode` and `Instancecount` as specified, `First` set to zero, and `Count` set to the number of vertices captured on vertex stream `Stream` the last time transform feedback was active on the transform feedback object named by `Id`.

edgeFlag(Flag)

Equivalent to `edgeFlagv/1`.

edgeFlagPointer(Stride, Ptr)

`gl:edgeFlagPointer/2` specifies the location and data format of an array of boolean edge flags to use when rendering. `Stride` specifies the byte stride from one edge flag to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays.

edgeFlagv/1

Each vertex of a polygon, separate triangle, or separate quadrilateral specified between a `gl:'begin'/1`/`gl:'end'/0` pair is marked as the start of either a boundary or nonboundary edge. If the current edge flag is true when the vertex is specified, the vertex is marked as the start of a boundary edge. Otherwise, the vertex is marked as the start of a nonboundary edge. `gl:edgeFlag/1` sets the edge flag bit to `?GL_TRUE` if `Flag` is `?GL_TRUE` and to `?GL_FALSE` otherwise.

enable(Cap)

Equivalent to `enablei/2`.

enableClientState(Cap)

`gl:enableClientState/1` and `gl:disableClientState/1` enable or disable individual client-side capabilities. By default, all client-side capabilities are disabled. Both `gl:enableClientState/1` and `gl:disableClientState/1` take a single argument, `Cap`, which can assume one of the following values

enablei(Target, Index)

`gl:enable/1` and `gl:disable/1` enable and disable various capabilities. Use `gl:isEnabled/1` or `gl:get()` to determine the current setting of any capability. The initial value for each capability with the exception of `?GL_DITHER` and `?GL_MULTISAMPLE` is `?GL_FALSE`. The initial value for `?GL_DITHER` and `?GL_MULTISAMPLE` is `?GL_TRUE`.

enableVertexArrayAttrib(Vaobj, Index)

Equivalent to `enableVertexAttribArray/1`.

enableVertexAttribArray(Index)

`gl:enableVertexAttribArray/1` and `gl:enableVertexArrayAttrib/2` enable the generic vertex attribute array specified by `Index`. `gl:enableVertexAttribArray/1` uses currently bound vertex array object for the operation, whereas `gl:enableVertexArrayAttrib/2` updates state of the vertex array object with ID `Vaobj`.

'end'()

`gl:'begin'/1` and `gl:'end'/0` delimit the vertices that define a primitive or a group of like primitives. `gl:'begin'/1` accepts a single argument that specifies in which of ten ways the vertices are interpreted. Taking n as an integer count starting at one, and N as the total number of vertices specified, the interpretations are as follows

endConditionalRender()

Conditional rendering is started using `gl:beginConditionalRender/2` and ended using `gl:endConditionalRender/0`. During conditional rendering, all vertex array commands, as well as `gl:clear/1` and `gl:clearBuffer()` have no effect if the (`?GL_SAMPLES_PASSED`) result of the query object `Id` is zero, or if the (`?GL_ANY_SAMPLES_PASSED`) result is `?GL_FALSE`. The results of commands setting the current vertex state, such as `gl:vertexAttrib()` are undefined. If the (`?GL_SAMPLES_PASSED`) result is non-zero or if the (`?GL_ANY_SAMPLES_PASSED`) result is `?GL_TRUE`, such commands are not discarded. The `Id` parameter to `gl:beginConditionalRender/2` must be the name of a query object previously returned from a call to `gl:genQueries/1`. `Mode` specifies how the results of the query object are to be interpreted. If `Mode` is `?GL_QUERY_WAIT`, the GL waits for the results of the query to be available and then uses the results to determine if subsequent rendering commands are discarded. If `Mode` is `?GL_QUERY_NO_WAIT`, the GL may choose to unconditionally execute the subsequent rendering commands without waiting for the query to complete.

endList()

Equivalent to `newList/2`.

endQuery(Target)

`gl:beginQuery/2` and `gl:endQuery/1` delimit the boundaries of a query object. `Query` must be a name previously returned from a call to `gl:genQueries/1`. If a query object with name `Id` does not yet exist it is created with the type determined by `Target`. `Target` must be one of `?GL_SAMPLES_PASSED`, `?GL_ANY_SAMPLES_PASSED`, `?GL_PRIMITIVES_GENERATED`, `?GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN`, or `?GL_TIME_ELAPSED`. The behavior of the query object depends on its type and is as follows.

endQueryIndexed(Target, Index)

`gl:beginQueryIndexed/3` and `gl:endQueryIndexed/2` delimit the boundaries of a query object. `Query` must be a name previously returned from a call to `gl:genQueries/1`. If a query object with name `Id` does not yet exist it is created with the type determined by `Target`. `Target` must be one of `?GL_SAMPLES_PASSED`, `?GL_ANY_SAMPLES_PASSED`, `?GL_PRIMITIVES_GENERATED`, `?GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN`, or `?GL_TIME_ELAPSED`. The behavior of the query object depends on its type and is as follows.

endTransformFeedback()

Transform feedback mode captures the values of varying variables written by the vertex shader (or, if active, the geometry shader). Transform feedback is said to be active after a call to `gl:beginTransformFeedback/1` until a subsequent call to `gl:endTransformFeedback/0`. Transform feedback commands must be paired.

evalCoord1d(U)

Equivalent to `evalCoord2fv/1`.

evalCoord1dv/1

Equivalent to `evalCoord2fv/1`.

evalCoord1f(U)

Equivalent to `evalCoord2fv/1`.

evalCoord1fv/1

Equivalent to `evalCoord2fv/1`.

evalCoord2d(U, V)

Equivalent to `evalCoord2fv/1`.

evalCoord2dv/1

Equivalent to `evalCoord2fv/1`.

evalCoord2f(U, V)

Equivalent to `evalCoord2fv/1`.

evalCoord2fv/1

`gl:evalCoord1()` evaluates enabled one-dimensional maps at argument `U`. `gl:evalCoord2()` does the same for two-dimensional maps using two domain values, `U` and `V`. To define a map, call `glMap1` and `glMap2`; to enable and disable it, call `gl:enable/1` and `gl:disable/1`.

evalMesh1(Mode, I1, I2)

Equivalent to `evalMesh2/5`.

evalMesh2(Mode, I1, I2, J1, J2)

`gl:mapGrid()` and `gl:evalMesh()` are used in tandem to efficiently generate and evaluate a series of evenly-spaced map domain values. `gl:evalMesh()` steps through the integer domain of a one- or two-dimensional grid, whose range is the domain of the evaluation maps specified by `glMap1` and `glMap2`. `Mode` determines whether the resulting vertices are connected as points, lines, or filled polygons.

evalPoint1(I)

Equivalent to `evalPoint2/2`.

evalPoint2(I, J)

`gl:mapGrid()` and `gl:evalMesh()` are used in tandem to efficiently generate and evaluate a series of evenly spaced map domain values. `gl:evalPoint()` can be used to evaluate a single grid point in the same gridspace that is traversed by `gl:evalMesh()`. Calling `gl:evalPoint1/1` is equivalent to calling glEvalCoord1( i.ð u+u 1 ); where ð u=(u 2-u 1)/n

feedbackBuffer(Size, Type, Buffer)

The `gl:feedbackBuffer/3` function controls feedback. Feedback, like selection, is a GL mode. The mode is selected by calling `gl:renderMode/1` with `?GL_FEEDBACK`. When the GL is in feedback mode, no pixels are produced by rasterization. Instead, information about primitives that would have been rasterized is fed back to the application using the GL.

fenceSync(Condition, Flags)

`gl:fenceSync/2` creates a new fence sync object, inserts a fence command into the GL command stream and associates it with that sync object, and returns a non-zero name corresponding to the sync object.

finish()

`gl:finish/0` does not return until the effects of all previously called GL commands are complete. Such effects include all changes to GL state, all changes to connection state, and all changes to the frame buffer contents.

flush()

Different GL implementations buffer commands in several different locations, including network buffers and the graphics accelerator itself. `gl:flush/0` empties all of these buffers, causing all issued commands to be executed as quickly as they are accepted by the actual rendering engine. Though this execution may not be completed in any particular time period, it does complete in finite time.

flushMappedBufferRange(Target, Offset, Length)

Equivalent to `flushMappedNamedBufferRange/3`.

flushMappedNamedBufferRange(Buffer, Offset, Length)

`gl:flushMappedBufferRange/3` indicates that modifications have been made to a range of a mapped buffer object. The buffer object must previously have been mapped with the `?GL_MAP_FLUSH_EXPLICIT_BIT` flag.

fogCoordd(Coord)

Equivalent to `fogCoordfv/1`.

fogCoorddv/1

Equivalent to `fogCoordfv/1`.

fogCoordf(Coord)

Equivalent to `fogCoordfv/1`.

fogCoordfv/1

`gl:fogCoord()` specifies the fog coordinate that is associated with each vertex and the current raster position. The value specified is interpolated and used in computing the fog color (see `gl:fog()`).

fogCoordPointer(Type, Stride, Pointer)

`gl:fogCoordPointer/3` specifies the location and data format of an array of fog coordinates to use when rendering. `Type` specifies the data type of each fog coordinate, and `Stride` specifies the byte stride from one fog coordinate to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays.

fogf(Pname, Param)

Equivalent to `fogiv/2`.

fogfv(Pname, Params)

Equivalent to `fogiv/2`.

fogi(Pname, Param)

Equivalent to `fogiv/2`.

fogiv(Pname, Params)

Fog is initially disabled. While enabled, fog affects rasterized geometry, bitmaps, and pixel blocks, but not buffer clear operations. To enable and disable fog, call `gl:enable/1` and `gl:disable/1` with argument `?GL_FOG`.

framebufferParameteri(Target, Pname, Param)

`gl:framebufferParameteri/3` and `glNamedFramebufferParameteri` modify the value of the parameter named `Pname` in the specified framebuffer object. There are no modifiable parameters of the default draw and read framebuffer, so they are not valid targets of these commands.

framebufferRenderbuffer(Target, Attachment, Renderbuffertarget, Renderbuffer)

`gl:framebufferRenderbuffer/4` and `glNamedFramebufferRenderbuffer` attaches a renderbuffer as one of the logical buffers of the specified framebuffer object. Renderbuffers cannot be attached to the default draw and read framebuffer, so they are not valid targets of these commands.

framebufferTexture1D(Target, Attachment, Textarget, Texture, Level)

Equivalent to `framebufferTextureLayer/5`.

framebufferTexture2D(Target, Attachment, Textarget, Texture, Level)

Equivalent to `framebufferTextureLayer/5`.

framebufferTexture3D(Target, Attachment, Textarget, Texture, Level, Zoffset)

Equivalent to `framebufferTextureLayer/5`.

framebufferTexture(Target, Attachment, Texture, Level)

Equivalent to `framebufferTextureLayer/5`.

framebufferTextureFaceARB(Target, Attachment, Texture, Level, Face)

Equivalent to `framebufferTextureLayer/5`.

framebufferTextureLayer(Target, Attachment, Texture, Level, Layer)

These commands attach a selected mipmap level or image of a texture object as one of the logical buffers of the specified framebuffer object. Textures cannot be attached to the default draw and read framebuffer, so they are not valid targets of these commands.

frontFace(Mode)

In a scene composed entirely of opaque closed surfaces, back-facing polygons are never visible. Eliminating these invisible polygons has the obvious benefit of speeding up the rendering of the image. To enable and disable elimination of back-facing polygons, call `gl:enable/1` and `gl:disable/1` with argument `?GL_CULL_FACE`.

frustum(Left, Right, Bottom, Top, Near_val, Far_val)

`gl:frustum/6` describes a perspective matrix that produces a perspective projection. The current matrix (see `gl:matrixMode/1`) is multiplied by this matrix and the result replaces the current matrix, as if `gl:multMatrix()` were called with the following matrix as its argument

genBuffers(N)

`gl:genBuffers/1` returns `N` buffer object names in `Buffers`. There is no guarantee that the names form a contiguous set of integers; however, it is guaranteed that none of the returned names was in use immediately before the call to `gl:genBuffers/1`.

generateMipmap(Target)

Equivalent to `generateTextureMipmap/1`.

generateTextureMipmap(Texture)

`gl:generateMipmap/1` and `gl:generateTextureMipmap/1` generates mipmaps for the specified texture object. For `gl:generateMipmap/1`, the texture object that is bound to `Target`. For `gl:generateTextureMipmap/1`, `Texture` is the name of the texture object.

genFramebuffers(N)

`gl:genFramebuffers/1` returns `N` framebuffer object names in `Ids`. There is no guarantee that the names form a contiguous set of integers; however, it is guaranteed that none of the returned names was in use immediately before the call to `gl:genFramebuffers/1`.

genLists(Range)

`gl:genLists/1` has one argument, `Range`. It returns an integer `n` such that `Range` contiguous empty display lists, named n, n+1, ..., n+range-1, are created. If `Range` is 0, if there is no group of `Range` contiguous names available, or if any error is generated, no display lists are generated, and 0 is returned.

genProgramPipelines(N)

`gl:genProgramPipelines/1` returns `N` previously unused program pipeline object names in `Pipelines`. These names are marked as used, for the purposes of `gl:genProgramPipelines/1` only, but they acquire program pipeline state only when they are first bound.

genQueries(N)

`gl:genQueries/1` returns `N` query object names in `Ids`. There is no guarantee that the names form a contiguous set of integers; however, it is guaranteed that none of the returned names was in use immediately before the call to `gl:genQueries/1`.

genRenderbuffers(N)

`gl:genRenderbuffers/1` returns `N` renderbuffer object names in `Renderbuffers`. There is no guarantee that the names form a contiguous set of integers; however, it is guaranteed that none of the returned names was in use immediately before the call to `gl:genRenderbuffers/1`.

genSamplers(Count)

`gl:genSamplers/1` returns `N` sampler object names in `Samplers`. There is no guarantee that the names form a contiguous set of integers; however, it is guaranteed that none of the returned names was in use immediately before the call to `gl:genSamplers/1`.

genTextures(N)

`gl:genTextures/1` returns `N` texture names in `Textures`. There is no guarantee that the names form a contiguous set of integers; however, it is guaranteed that none of the returned names was in use immediately before the call to `gl:genTextures/1`.

genTransformFeedbacks(N)

`gl:genTransformFeedbacks/1` returns `N` previously unused transform feedback object names in `Ids`. These names are marked as used, for the purposes of `gl:genTransformFeedbacks/1` only, but they acquire transform feedback state only when they are first bound.

genVertexArrays(N)

`gl:genVertexArrays/1` returns `N` vertex array object names in `Arrays`. There is no guarantee that the names form a contiguous set of integers; however, it is guaranteed that none of the returned names was in use immediately before the call to `gl:genVertexArrays/1`.

getActiveAttrib(Program, Index, BufSize)

`gl:getActiveAttrib/3` returns information about an active attribute variable in the program object specified by `Program`. The number of active attributes can be obtained by calling `gl:getProgram()` with the value `?GL_ACTIVE_ATTRIBUTES`. A value of 0 for `Index` selects the first active attribute variable. Permissible values for `Index` range from zero to the number of active attribute variables minus one.

getActiveSubroutineName(Program, Shadertype, Index, Bufsize)

`gl:getActiveSubroutineName/4` queries the name of an active shader subroutine uniform from the program object given in `Program`. `Index` specifies the index of the shader subroutine uniform within the shader stage given by `Stage`, and must between zero and the value of `?GL_ACTIVE_SUBROUTINES` minus one for the shader stage.

getActiveSubroutineUniformName(Program, Shadertype, Index, Bufsize)

`gl:getActiveSubroutineUniformName/4` retrieves the name of an active shader subroutine uniform. `Program` contains the name of the program containing the uniform. `Shadertype` specifies the stage for which the uniform location, given by `Index`, is valid. `Index` must be between zero and the value of `?GL_ACTIVE_SUBROUTINE_UNIFORMS` minus one for the shader stage.

getActiveUniform(Program, Index, BufSize)

`gl:getActiveUniform/3` returns information about an active uniform variable in the program object specified by `Program`. The number of active uniform variables can be obtained by calling `gl:getProgram()` with the value `?GL_ACTIVE_UNIFORMS`. A value of 0 for `Index` selects the first active uniform variable. Permissible values for `Index` range from zero to the number of active uniform variables minus one.

getActiveUniformBlockiv(Program, UniformBlockIndex, Pname, Params)

`gl:getActiveUniformBlockiv/4` retrieves information about an active uniform block within `Program`.

getActiveUniformBlockName(Program, UniformBlockIndex, BufSize)

`gl:getActiveUniformBlockName/3` retrieves the name of the active uniform block at `UniformBlockIndex` within `Program`.

getActiveUniformName(Program, UniformIndex, BufSize)

`gl:getActiveUniformName/3` returns the name of the active uniform at `UniformIndex` within `Program`. If `UniformName` is not NULL, up to `BufSize` characters (including a nul-terminator) will be written into the array whose address is specified by `UniformName`. If `Length` is not NULL, the number of characters that were (or would have been) written into `UniformName` (not including the nul-terminator) will be placed in the variable whose address is specified in `Length`. If `Length` is NULL, no length is returned. The length of the longest uniform name in `Program` is given by the value of `?GL_ACTIVE_UNIFORM_MAX_LENGTH`, which can be queried with `gl:getProgram()`.

getActiveUniformsiv(Program, UniformIndices, Pname)

`gl:getActiveUniformsiv/3` queries the value of the parameter named `Pname` for each of the uniforms within `Program` whose indices are specified in the array of `UniformCount` unsigned integers `UniformIndices`. Upon success, the value of the parameter for each uniform is written into the corresponding entry in the array whose address is given in `Params`. If an error is generated, nothing is written into `Params`.

getAttachedShaders(Program, MaxCount)

`gl:getAttachedShaders/2` returns the names of the shader objects attached to `Program`. The names of shader objects that are attached to `Program` will be returned in `Shaders.` The actual number of shader names written into `Shaders` is returned in `Count.` If no shader objects are attached to `Program`, `Count` is set to 0. The maximum number of shader names that may be returned in `Shaders` is specified by `MaxCount`.

getAttribLocation(Program, Name)

`gl:getAttribLocation/2` queries the previously linked program object specified by `Program` for the attribute variable specified by `Name` and returns the index of the generic vertex attribute that is bound to that attribute variable. If `Name` is a matrix attribute variable, the index of the first column of the matrix is returned. If the named attribute variable is not an active attribute in the specified program object or if `Name` starts with the reserved prefix "gl_", a value of -1 is returned.

getBooleani_v(Target, Index)

Equivalent to `getIntegerv/1`.

getBooleanv(Pname)

Equivalent to `getIntegerv/1`.

getBufferParameteri64v(Target, Pname)

Equivalent to `getBufferParameterivARB/2`.

getBufferParameteriv(Target, Pname)

`gl:getBufferParameteriv/2` returns in `Data` a selected parameter of the buffer object specified by `Target`.

getBufferParameterivARB(Target, Pname)

These functions return in `Data` a selected parameter of the specified buffer object.

getBufferSubData(Target, Offset, Size, Data)

`gl:getBufferSubData/4` and `glGetNamedBufferSubData` return some or all of the data contents of the data store of the specified buffer object. Data starting at byte offset `Offset` and extending for `Size` bytes is copied from the buffer object's data store to the memory pointed to by `Data`. An error is thrown if the buffer object is currently mapped, or if `Offset` and `Size` together define a range beyond the bounds of the buffer object's data store.

getClipPlane(Plane)

`gl:getClipPlane/1` returns in `Equation` the four coefficients of the plane equation for `Plane`.

getColorTable(Target, Format, Type, Table)

`gl:getColorTable/4` returns in `Table` the contents of the color table specified by `Target`. No pixel transfer operations are performed, but pixel storage modes that are applicable to `gl:readPixels/7` are performed.

getColorTableParameterfv(Target, Pname)

Equivalent to `getColorTableParameteriv/2`.

getColorTableParameteriv(Target, Pname)

Returns parameters specific to color table `Target`.

getCompressedTexImage(Target, Lod, Img)

`gl:getCompressedTexImage/3` and `glGetnCompressedTexImage` return the compressed texture image associated with `Target` and `Lod` into `Pixels`. `glGetCompressedTextureImage` serves the same purpose, but instead of taking a texture target, it takes the ID of the texture object. `Pixels` should be an array of `BufSize` bytes for `glGetnCompresedTexImage` and `glGetCompressedTextureImage` functions, and of `?GL_TEXTURE_COMPRESSED_IMAGE_SIZE` bytes in case of `gl:getCompressedTexImage/3`. If the actual data takes less space than `BufSize`, the remaining bytes will not be touched. `Target` specifies the texture target, to which the texture the data the function should extract the data from is bound to. `Lod` specifies the level-of-detail number of the desired image.

getConvolutionFilter(Target, Format, Type, Image)

`gl:getConvolutionFilter/4` returns the current 1D or 2D convolution filter kernel as an image. The one- or two-dimensional image is placed in `Image` according to the specifications in `Format` and `Type`. No pixel transfer operations are performed on this image, but the relevant pixel storage modes are applied.

getConvolutionParameterfv(Target, Pname)

Equivalent to `getConvolutionParameteriv/2`.

getConvolutionParameteriv(Target, Pname)

`gl:getConvolutionParameter()` retrieves convolution parameters. `Target` determines which convolution filter is queried. `Pname` determines which parameter is returned

getDebugMessageLog(Count, BufSize)

`gl:getDebugMessageLog/2` retrieves messages from the debug message log. A maximum of `Count` messages are retrieved from the log. If `Sources` is not NULL then the source of each message is written into up to `Count` elements of the array. If `Types` is not NULL then the type of each message is written into up to `Count` elements of the array. If `Id` is not NULL then the identifier of each message is written into up to `Count` elements of the array. If `Severities` is not NULL then the severity of each message is written into up to `Count` elements of the array. If `Lengths` is not NULL then the length of each message is written into up to `Count` elements of the array.

getDoublei_v(Target, Index)

Equivalent to `getIntegerv/1`.

getDoublev(Pname)

Equivalent to `getIntegerv/1`.

getError()

`gl:getError/0` returns the value of the error flag. Each detectable error is assigned a numeric code and symbolic name. When an error occurs, the error flag is set to the appropriate error code value. No other errors are recorded until `gl:getError/0` is called, the error code is returned, and the flag is reset to `?GL_NO_ERROR`. If a call to `gl:getError/0` returns `?GL_NO_ERROR`, there has been no detectable error since the last call to `gl:getError/0`, or since the GL was initialized.

getFloati_v(Target, Index)

Equivalent to `getIntegerv/1`.

getFloatv(Pname)

Equivalent to `getIntegerv/1`.

getFragDataIndex(Program, Name)

`gl:getFragDataIndex/2` returns the index of the fragment color to which the variable `Name` was bound when the program object `Program` was last linked. If `Name` is not a varying out variable of `Program`, or if an error occurs, -1 will be returned.

getFragDataLocation(Program, Name)

`gl:getFragDataLocation/2` retrieves the assigned color number binding for the user-defined varying out variable `Name` for program `Program`. `Program` must have previously been linked. `Name` must be a null-terminated string. If `Name` is not the name of an active user-defined varying out fragment shader variable within `Program`, -1 will be returned.

getFramebufferAttachmentParameteriv(Target, Attachment, Pname)

`gl:getFramebufferAttachmentParameteriv/3` and `glGetNamedFramebufferAttachmentParameteriv` return parameters of attachments of a specified framebuffer object.

getFramebufferParameteriv(Target, Pname)

`gl:getFramebufferParameteriv/2` and `glGetNamedFramebufferParameteriv` query parameters of a specified framebuffer object.

getGraphicsResetStatus()

Certain events can result in a reset of the GL context. Such a reset causes all context state to be lost and requires the application to recreate all objects in the affected context.

getHistogram(Target, Reset, Format, Type, Values)

`gl:getHistogram/5` returns the current histogram table as a one-dimensional image with the same width as the histogram. No pixel transfer operations are performed on this image, but pixel storage modes that are applicable to 1D images are honored.

getHistogramParameterfv(Target, Pname)

Equivalent to `getHistogramParameteriv/2`.

getHistogramParameteriv(Target, Pname)

`gl:getHistogramParameter()` is used to query parameter values for the current histogram or for a proxy. The histogram state information may be queried by calling `gl:getHistogramParameter()` with a `Target` of `?GL_HISTOGRAM` (to obtain information for the current histogram table) or `?GL_PROXY_HISTOGRAM` (to obtain information from the most recent proxy request) and one of the following values for the `Pname` argument

getInteger64i_v(Target, Index)

Equivalent to `getIntegerv/1`.

getInteger64v(Pname)

Equivalent to `getIntegerv/1`.

getIntegeri_v(Target, Index)

Equivalent to `getIntegerv/1`.

getIntegerv(Pname)

These commands return values for simple state variables in GL. `Pname` is a symbolic constant indicating the state variable to be returned, and `Data` is a pointer to an array of the indicated type in which to place the returned data.

getInternalformati64v(Target, Internalformat, Pname, BufSize)

Equivalent to `getInternalformativ/4`.

getInternalformativ(Target, Internalformat, Pname, BufSize)

No documentation available.

getLightfv(Light, Pname)

Equivalent to `getLightiv/2`.

getLightiv(Light, Pname)

`gl:getLight()` returns in `Params` the value or values of a light source parameter. `Light` names the light and is a symbolic name of the form `?GL_LIGHT` i where i ranges from 0 to the value of `?GL_MAX_LIGHTS` - 1. `?GL_MAX_LIGHTS` is an implementation dependent constant that is greater than or equal to eight. `Pname` specifies one of ten light source parameters, again by symbolic name.

getMapdv(Target, Query, V)

Equivalent to `getMapiv/3`.

getMapfv(Target, Query, V)

Equivalent to `getMapiv/3`.

getMapiv(Target, Query, V)

`glMap1` and `glMap2` define evaluators. `gl:getMap()` returns evaluator parameters. `Target` chooses a map, `Query` selects a specific parameter, and `V` points to storage where the values will be returned.

getMaterialfv(Face, Pname)

Equivalent to `getMaterialiv/2`.

getMaterialiv(Face, Pname)

`gl:getMaterial()` returns in `Params` the value or values of parameter `Pname` of material `Face`. Six parameters are defined

getMinmax(Target, Reset, Format, Types, Values)

`gl:getMinmax/5` returns the accumulated minimum and maximum pixel values (computed on a per-component basis) in a one-dimensional image of width 2. The first set of return values are the minima, and the second set of return values are the maxima. The format of the return values is determined by `Format`, and their type is determined by `Types`.

getMinmaxParameterfv(Target, Pname)

Equivalent to `getMinmaxParameteriv/2`.

getMinmaxParameteriv(Target, Pname)

`gl:getMinmaxParameter()` retrieves parameters for the current minmax table by setting `Pname` to one of the following values

getMultisamplefv(Pname, Index)

`gl:getMultisamplefv/2` queries the location of a given sample. `Pname` specifies the sample parameter to retrieve and must be `?GL_SAMPLE_POSITION`. `Index` corresponds to the sample for which the location should be returned. The sample location is returned as two floating-point values in `Val[0]` and `Val[1]`, each between 0 and 1, corresponding to the `X` and `Y` locations respectively in the GL pixel space of that sample. (0.5, 0.5) this corresponds to the pixel center. `Index` must be between zero and the value of `?GL_SAMPLES` minus one.

getPixelMapfv(Map, Values)

Equivalent to `getPixelMapusv/2`.

getPixelMapuiv(Map, Values)

Equivalent to `getPixelMapusv/2`.

getPixelMapusv(Map, Values)

See the `gl:pixelMap()` reference page for a description of the acceptable values for the `Map` parameter. `gl:getPixelMap()` returns in `Data` the contents of the pixel map specified in `Map`. Pixel maps are used during the execution of `gl:readPixels/7`, `gl:drawPixels/5`, `gl:copyPixels/5`, `gl:texImage1D/8`, `gl:texImage2D/9`, `gl:texImage3D/10`, `gl:texSubImage1D/7`, `gl:texSubImage2D/9`, `gl:texSubImage3D/11`, `gl:copyTexImage1D/7`, `gl:copyTexImage2D/8`, `gl:copyTexSubImage1D/6`, `gl:copyTexSubImage2D/8`, and `gl:copyTexSubImage3D/9`. to map color indices, stencil indices, color components, and depth components to other values.

getPolygonStipple()

`gl:getPolygonStipple/0` returns to `Pattern` a 32×32 polygon stipple pattern. The pattern is packed into memory as if `gl:readPixels/7` with both `height` and `width` of 32, `type` of `?GL_BITMAP`, and `format` of `?GL_COLOR_INDEX` were called, and the stipple pattern were stored in an internal 32×32 color index buffer. Unlike `gl:readPixels/7`, however, pixel transfer operations (shift, offset, pixel map) are not applied to the returned stipple image.

getProgramBinary(Program, BufSize)

`gl:getProgramBinary/2` returns a binary representation of the compiled and linked executable for `Program` into the array of bytes whose address is specified in `Binary`. The maximum number of bytes that may be written into `Binary` is specified by `BufSize`. If the program binary is greater in size than `BufSize` bytes, then an error is generated, otherwise the actual number of bytes written into `Binary` is returned in the variable whose address is given by `Length`. If `Length` is `?NULL`, then no length is returned.

getProgramInfoLog(Program, BufSize)

`gl:getProgramInfoLog/2` returns the information log for the specified program object. The information log for a program object is modified when the program object is linked or validated. The string that is returned will be null terminated.

getProgramInterfaceiv(Program, ProgramInterface, Pname)

`gl:getProgramInterfaceiv/3` queries the property of the interface identifed by `ProgramInterface` in `Program`, the property name of which is given by `Pname`.

getProgramiv(Program, Pname)

`gl:getProgram()` returns in `Params` the value of a parameter for a specific program object. The following parameters are defined

getProgramPipelineInfoLog(Pipeline, BufSize)

`gl:getProgramPipelineInfoLog/2` retrieves the info log for the program pipeline object `Pipeline`. The info log, including its null terminator, is written into the array of characters whose address is given by `InfoLog`. The maximum number of characters that may be written into `InfoLog` is given by `BufSize`, and the actual number of characters written into `InfoLog` is returned in the integer whose address is given by `Length`. If `Length` is `?NULL`, no length is returned.

getProgramPipelineiv(Pipeline, Pname)

`gl:getProgramPipelineiv/2` retrieves the value of a property of the program pipeline object `Pipeline`. `Pname` specifies the name of the parameter whose value to retrieve. The value of the parameter is written to the variable whose address is given by `Params`.

getProgramResourceIndex(Program, ProgramInterface, Name)

`gl:getProgramResourceIndex/3` returns the unsigned integer index assigned to a resource named `Name` in the interface type `ProgramInterface` of program object `Program`.

getProgramResourceLocation(Program, ProgramInterface, Name)

`gl:getProgramResourceLocation/3` returns the location assigned to the variable named `Name` in interface `ProgramInterface` of program object `Program`. `Program` must be the name of a program that has been linked successfully. `ProgramInterface` must be one of `?GL_UNIFORM`, `?GL_PROGRAM_INPUT`, `?GL_PROGRAM_OUTPUT`, `?GL_VERTEX_SUBROUTINE_UNIFORM`, `?GL_TESS_CONTROL_SUBROUTINE_UNIFORM`, `?GL_TESS_EVALUATION_SUBROUTINE_UNIFORM`, `?GL_GEOMETRY_SUBROUTINE_UNIFORM`, `?GL_FRAGMENT_SUBROUTINE_UNIFORM`, `?GL_COMPUTE_SUBROUTINE_UNIFORM`, or `?GL_TRANSFORM_FEEDBACK_BUFFER`.

getProgramResourceLocationIndex(Program, ProgramInterface, Name)

`gl:getProgramResourceLocationIndex/3` returns the fragment color index assigned to the variable named `Name` in interface `ProgramInterface` of program object `Program`. `Program` must be the name of a program that has been linked successfully. `ProgramInterface` must be `?GL_PROGRAM_OUTPUT`.

getProgramResourceName(Program, ProgramInterface, Index, BufSize)

`gl:getProgramResourceName/4` retrieves the name string assigned to the single active resource with an index of `Index` in the interface `ProgramInterface` of program object `Program`. `Index` must be less than the number of entries in the active resource list for `ProgramInterface`.

getProgramStageiv(Program, Shadertype, Pname)

`gl:getProgramStage()` queries a parameter of a shader stage attached to a program object. `Program` contains the name of the program to which the shader is attached. `Shadertype` specifies the stage from which to query the parameter. `Pname` specifies which parameter should be queried. The value or values of the parameter to be queried is returned in the variable whose address is given in `Values`.

getQueryBufferObjecti64v(Id, Buffer, Pname, Offset)

Equivalent to `getQueryObjectuiv/2`.

getQueryBufferObjectiv(Id, Buffer, Pname, Offset)

Equivalent to `getQueryObjectuiv/2`.

getQueryBufferObjectui64v(Id, Buffer, Pname, Offset)

Equivalent to `getQueryObjectuiv/2`.

getQueryBufferObjectuiv(Id, Buffer, Pname, Offset)

Equivalent to `getQueryObjectuiv/2`.

getQueryIndexediv(Target, Index, Pname)

`gl:getQueryIndexediv/3` returns in `Params` a selected parameter of the indexed query object target specified by `Target` and `Index`. `Index` specifies the index of the query object target and must be between zero and a target-specific maxiumum.

getQueryiv(Target, Pname)

`gl:getQueryiv/2` returns in `Params` a selected parameter of the query object target specified by `Target`.

getQueryObjecti64v(Id, Pname)

Equivalent to `getQueryObjectuiv/2`.

getQueryObjectiv(Id, Pname)

Equivalent to `getQueryObjectuiv/2`.

getQueryObjectui64v(Id, Pname)

Equivalent to `getQueryObjectuiv/2`.

getQueryObjectuiv(Id, Pname)

These commands return a selected parameter of the query object specified by `Id`. `gl:getQueryObject()` returns in `Params` a selected parameter of the query object specified by `Id`. `gl:getQueryBufferObject()` returns in `Buffer` a selected parameter of the query object specified by `Id`, by writing it to `Buffer`'s data store at the byte offset specified by `Offset`.

getRenderbufferParameteriv(Target, Pname)

`gl:getRenderbufferParameteriv/2` and `glGetNamedRenderbufferParameteriv` query parameters of a specified renderbuffer object.

getSamplerParameterfv(Sampler, Pname)

Equivalent to `getSamplerParameteriv/2`.

getSamplerParameterIiv(Sampler, Pname)

Equivalent to `getSamplerParameteriv/2`.

getSamplerParameterIuiv(Sampler, Pname)

Equivalent to `getSamplerParameteriv/2`.

getSamplerParameteriv(Sampler, Pname)

`gl:getSamplerParameter()` returns in `Params` the value or values of the sampler parameter specified as `Pname`. `Sampler` defines the target sampler, and must be the name of an existing sampler object, returned from a previous call to `gl:genSamplers/1`. `Pname` accepts the same symbols as `gl:samplerParameter()`, with the same interpretations

getShaderInfoLog(Shader, BufSize)

`gl:getShaderInfoLog/2` returns the information log for the specified shader object. The information log for a shader object is modified when the shader is compiled. The string that is returned will be null terminated.

getShaderiv(Shader, Pname)

`gl:getShader()` returns in `Params` the value of a parameter for a specific shader object. The following parameters are defined

getShaderPrecisionFormat(Shadertype, Precisiontype)

`gl:getShaderPrecisionFormat/2` retrieves the numeric range and precision for the implementation's representation of quantities in different numeric formats in specified shader type. `ShaderType` specifies the type of shader for which the numeric precision and range is to be retrieved and must be one of `?GL_VERTEX_SHADER` or `?GL_FRAGMENT_SHADER`. `PrecisionType` specifies the numeric format to query and must be one of `?GL_LOW_FLOAT`, `?GL_MEDIUM_FLOAT``?GL_HIGH_FLOAT`, `?GL_LOW_INT`, `?GL_MEDIUM_INT`, or `?GL_HIGH_INT`.

getShaderSource(Shader, BufSize)

`gl:getShaderSource/2` returns the concatenation of the source code strings from the shader object specified by `Shader`. The source code strings for a shader object are the result of a previous call to `gl:shaderSource/2`. The string returned by the function will be null terminated.

getString(Name)

Equivalent to `getStringi/2`.

getStringi(Name, Index)

`gl:getString/1` returns a pointer to a static string describing some aspect of the current GL connection. `Name` can be one of the following

getSubroutineIndex(Program, Shadertype, Name)

`gl:getSubroutineIndex/3` returns the index of a subroutine uniform within a shader stage attached to a program object. `Program` contains the name of the program to which the shader is attached. `Shadertype` specifies the stage from which to query shader subroutine index. `Name` contains the null-terminated name of the subroutine uniform whose name to query.

getSubroutineUniformLocation(Program, Shadertype, Name)

`gl:getSubroutineUniformLocation/3` returns the location of the subroutine uniform variable `Name` in the shader stage of type `Shadertype` attached to `Program`, with behavior otherwise identical to `gl:getUniformLocation/2`.

getSynciv(Sync, Pname, BufSize)

`gl:getSynciv/3` retrieves properties of a sync object. `Sync` specifies the name of the sync object whose properties to retrieve.

getTexEnvfv(Target, Pname)

Equivalent to `getTexEnviv/2`.

getTexEnviv(Target, Pname)

`gl:getTexEnv()` returns in `Params` selected values of a texture environment that was specified with `gl:texEnv()`. `Target` specifies a texture environment.

getTexGendv(Coord, Pname)

Equivalent to `getTexGeniv/2`.

getTexGenfv(Coord, Pname)

Equivalent to `getTexGeniv/2`.

getTexGeniv(Coord, Pname)

`gl:getTexGen()` returns in `Params` selected parameters of a texture coordinate generation function that was specified using `gl:texGen()`. `Coord` names one of the (`s`, `t`, `r`, `q`) texture coordinates, using the symbolic constant `?GL_S`, `?GL_T`, `?GL_R`, or `?GL_Q`.

getTexImage(Target, Level, Format, Type, Pixels)

`gl:getTexImage/5`, `glGetnTexImage` and `glGetTextureImage` functions return a texture image into `Pixels`. For `gl:getTexImage/5` and `glGetnTexImage`, `Target` specifies whether the desired texture image is one specified by `gl:texImage1D/8` (`?GL_TEXTURE_1D`), `gl:texImage2D/9` (`?GL_TEXTURE_1D_ARRAY`, `?GL_TEXTURE_RECTANGLE`, `?GL_TEXTURE_2D` or any of `?GL_TEXTURE_CUBE_MAP_*`), or `gl:texImage3D/10` (`?GL_TEXTURE_2D_ARRAY`, `?GL_TEXTURE_3D`, `?GL_TEXTURE_CUBE_MAP_ARRAY`). For `glGetTextureImage`, `Texture` specifies the texture object name. In addition to types of textures accepted by `gl:getTexImage/5` and `glGetnTexImage`, the function also accepts cube map texture objects (with effective target `?GL_TEXTURE_CUBE_MAP`). `Level` specifies the level-of-detail number of the desired image. `Format` and `Type` specify the format and type of the desired image array. See the reference page for `gl:texImage1D/8` for a description of the acceptable values for the `Format` and `Type` parameters, respectively. For glGetnTexImage and glGetTextureImage functions, bufSize tells the size of the buffer to receive the retrieved pixel data. `glGetnTexImage` and `glGetTextureImage` do not write more than `BufSize` bytes into `Pixels`.

getTexLevelParameterfv(Target, Level, Pname)

Equivalent to `getTexLevelParameteriv/3`.

getTexLevelParameteriv(Target, Level, Pname)

`gl:getTexLevelParameterfv/3`, `gl:getTexLevelParameteriv/3`, `glGetTextureLevelParameterfv` and `glGetTextureLevelParameteriv` return in `Params` texture parameter values for a specific level-of-detail value, specified as `Level`. For the first two functions, `Target` defines the target texture, either `?GL_TEXTURE_1D`, `?GL_TEXTURE_2D`, `?GL_TEXTURE_3D`, `?GL_PROXY_TEXTURE_1D`, `?GL_PROXY_TEXTURE_2D`, `?GL_PROXY_TEXTURE_3D`, `?GL_TEXTURE_CUBE_MAP_POSITIVE_X`, `?GL_TEXTURE_CUBE_MAP_NEGATIVE_X`, `?GL_TEXTURE_CUBE_MAP_POSITIVE_Y`, `?GL_TEXTURE_CUBE_MAP_NEGATIVE_Y`, `?GL_TEXTURE_CUBE_MAP_POSITIVE_Z`, `?GL_TEXTURE_CUBE_MAP_NEGATIVE_Z`, or `?GL_PROXY_TEXTURE_CUBE_MAP`. The remaining two take a `Texture` argument which specifies the name of the texture object.

getTexParameterfv(Target, Pname)

Equivalent to `getTexParameteriv/2`.

getTexParameterIiv(Target, Pname)

Equivalent to `getTexParameteriv/2`.

getTexParameterIuiv(Target, Pname)

Equivalent to `getTexParameteriv/2`.

getTexParameteriv(Target, Pname)

`gl:getTexParameter()` and `glGetTextureParameter` return in `Params` the value or values of the texture parameter specified as `Pname`. `Target` defines the target texture. `?GL_TEXTURE_1D`, `?GL_TEXTURE_2D`, `?GL_TEXTURE_3D`, `?GL_TEXTURE_1D_ARRAY`, `?GL_TEXTURE_2D_ARRAY`, `?GL_TEXTURE_RECTANGLE`, `?GL_TEXTURE_CUBE_MAP`, `?GL_TEXTURE_CUBE_MAP_ARRAY`, `?GL_TEXTURE_2D_MULTISAMPLE`, or `?GL_TEXTURE_2D_MULTISAMPLE_ARRAY` specify one-, two-, or three-dimensional, one-dimensional array, two-dimensional array, rectangle, cube-mapped or cube-mapped array, two-dimensional multisample, or two-dimensional multisample array texturing, respectively. `Pname` accepts the same symbols as `gl:texParameter()`, with the same interpretations

getTransformFeedbackVarying(Program, Index, BufSize)

Information about the set of varying variables in a linked program that will be captured during transform feedback may be retrieved by calling `gl:getTransformFeedbackVarying/3`. `gl:getTransformFeedbackVarying/3` provides information about the varying variable selected by `Index`. An `Index` of 0 selects the first varying variable specified in the `Varyings` array passed to `gl:transformFeedbackVaryings/3`, and an `Index` of the value of `?GL_TRANSFORM_FEEDBACK_VARYINGS` minus one selects the last such variable.

getUniformBlockIndex(Program, UniformBlockName)

`gl:getUniformBlockIndex/2` retrieves the index of a uniform block within `Program`.

getUniformdv(Program, Location)

Equivalent to `getUniformuiv/2`.

getUniformfv(Program, Location)

Equivalent to `getUniformuiv/2`.

getUniformIndices(Program, UniformNames)

`gl:getUniformIndices/2` retrieves the indices of a number of uniforms within `Program`.

getUniformiv(Program, Location)

Equivalent to `getUniformuiv/2`.

getUniformLocation(Program, Name)

`glGetUniformLocation`returns an integer that represents the location of a specific uniform variable within a program object. `Name` must be a null terminated string that contains no white space. `Name` must be an active uniform variable name in `Program` that is not a structure, an array of structures, or a subcomponent of a vector or a matrix. This function returns -1 if `Name` does not correspond to an active uniform variable in `Program`, if `Name` starts with the reserved prefix "gl_", or if `Name` is associated with an atomic counter or a named uniform block.

getUniformSubroutineuiv(Shadertype, Location)

`gl:getUniformSubroutine()` retrieves the value of the subroutine uniform at location `Location` for shader stage `Shadertype` of the current program. `Location` must be less than the value of `?GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS` for the shader currently in use at shader stage `Shadertype`. The value of the subroutine uniform is returned in `Values`.

getUniformuiv(Program, Location)

`gl:getUniform()` and `glGetnUniform` return in `Params` the value(s) of the specified uniform variable. The type of the uniform variable specified by `Location` determines the number of values returned. If the uniform variable is defined in the shader as a boolean, int, or float, a single value will be returned. If it is defined as a vec2, ivec2, or bvec2, two values will be returned. If it is defined as a vec3, ivec3, or bvec3, three values will be returned, and so on. To query values stored in uniform variables declared as arrays, call `gl:getUniform()` for each element of the array. To query values stored in uniform variables declared as structures, call `gl:getUniform()` for each field in the structure. The values for uniform variables declared as a matrix will be returned in column major order.

getVertexAttribdv(Index, Pname)

Equivalent to `getVertexAttribiv/2`.

getVertexAttribfv(Index, Pname)

Equivalent to `getVertexAttribiv/2`.

getVertexAttribIiv(Index, Pname)

Equivalent to `getVertexAttribiv/2`.

getVertexAttribIuiv(Index, Pname)

Equivalent to `getVertexAttribiv/2`.

getVertexAttribiv(Index, Pname)

`gl:getVertexAttrib()` returns in `Params` the value of a generic vertex attribute parameter. The generic vertex attribute to be queried is specified by `Index`, and the parameter to be queried is specified by `Pname`.

getVertexAttribLdv(Index, Pname)

Equivalent to `getVertexAttribiv/2`.

hint(Target, Mode)

Certain aspects of GL behavior, when there is room for interpretation, can be controlled with hints. A hint is specified with two arguments. `Target` is a symbolic constant indicating the behavior to be controlled, and `Mode` is another symbolic constant indicating the desired behavior. The initial value for each `Target` is `?GL_DONT_CARE`. `Mode` can be one of the following

histogram(Target, Width, Internalformat, Sink)

When `?GL_HISTOGRAM` is enabled, RGBA color components are converted to histogram table indices by clamping to the range [0,1], multiplying by the width of the histogram table, and rounding to the nearest integer. The table entries selected by the RGBA indices are then incremented. (If the internal format of the histogram table includes luminance, then the index derived from the R color component determines the luminance table entry to be incremented.) If a histogram table entry is incremented beyond its maximum value, then its value becomes undefined. (This is not an error.)

indexd(C)

Equivalent to `indexubv/1`.

indexdv/1

Equivalent to `indexubv/1`.

indexf(C)

Equivalent to `indexubv/1`.

indexfv/1

Equivalent to `indexubv/1`.

indexi(C)

Equivalent to `indexubv/1`.

indexiv/1

Equivalent to `indexubv/1`.

indexMask(Mask)

`gl:indexMask/1` controls the writing of individual bits in the color index buffers. The least significant n bits of `Mask`, where n is the number of bits in a color index buffer, specify a mask. Where a 1 (one) appears in the mask, it's possible to write to the corresponding bit in the color index buffer (or buffers). Where a 0 (zero) appears, the corresponding bit is write-protected.

indexPointer(Type, Stride, Ptr)

`gl:indexPointer/3` specifies the location and data format of an array of color indexes to use when rendering. `Type` specifies the data type of each color index and `Stride` specifies the byte stride from one color index to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays.

indexs(C)

Equivalent to `indexubv/1`.

indexsv/1

Equivalent to `indexubv/1`.

indexub(C)

Equivalent to `indexubv/1`.

indexubv/1

`gl:index()` updates the current (single-valued) color index. It takes one argument, the new value for the current color index.

initNames()

The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers. `gl:initNames/0` causes the name stack to be initialized to its default empty state.

interleavedArrays(Format, Stride, Pointer)

`gl:interleavedArrays/3` lets you specify and enable individual color, normal, texture and vertex arrays whose elements are part of a larger aggregate array element. For some implementations, this is more efficient than specifying the arrays separately.

invalidateBufferData(Buffer)

`gl:invalidateBufferData/1` invalidates all of the content of the data store of a buffer object. After invalidation, the content of the buffer's data store becomes undefined.

invalidateBufferSubData(Buffer, Offset, Length)

`gl:invalidateBufferSubData/3` invalidates all or part of the content of the data store of a buffer object. After invalidation, the content of the specified range of the buffer's data store becomes undefined. The start of the range is given by `Offset` and its size is given by `Length`, both measured in basic machine units.

invalidateFramebuffer(Target, Attachments)

`gl:invalidateFramebuffer/2` and `glInvalidateNamedFramebufferData` invalidate the entire contents of a specified set of attachments of a framebuffer.

invalidateSubFramebuffer(Target, Attachments, X, Y, Width, Height)

`gl:invalidateSubFramebuffer/6` and `glInvalidateNamedFramebufferSubData` invalidate the contents of a specified region of a specified set of attachments of a framebuffer.

invalidateTexImage(Texture, Level)

`gl:invalidateTexSubImage/8` invalidates all of a texture image. `Texture` and `Level` indicated which texture image is being invalidated. After this command, data in the texture image has undefined values.

invalidateTexSubImage(Texture, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth)

`gl:invalidateTexSubImage/8` invalidates all or part of a texture image. `Texture` and `Level` indicated which texture image is being invalidated. After this command, data in that subregion have undefined values. `Xoffset`, `Yoffset`, `Zoffset`, `Width`, `Height`, and `Depth` are interpreted as they are in `gl:texSubImage3D/11`. For texture targets that don't have certain dimensions, this command treats those dimensions as having a size of 1. For example, to invalidate a portion of a two- dimensional texture, the application would use `Zoffset` equal to zero and `Depth` equal to one. Cube map textures are treated as an array of six slices in the z-dimension, where a value of `Zoffset` is interpreted as specifying face `?GL_TEXTURE_CUBE_MAP_POSITIVE_X` + `Zoffset`.

isBuffer(Buffer)

`gl:isBuffer/1` returns `?GL_TRUE` if `Buffer` is currently the name of a buffer object. If `Buffer` is zero, or is a non-zero value that is not currently the name of a buffer object, or if an error occurs, `gl:isBuffer/1` returns `?GL_FALSE`.

isEnabled(Cap)

Equivalent to `isEnabledi/2`.

isEnabledi(Target, Index)

`gl:isEnabled/1` returns `?GL_TRUE` if `Cap` is an enabled capability and returns `?GL_FALSE` otherwise. Boolean states that are indexed may be tested with `gl:isEnabledi/2`. For `gl:isEnabledi/2`, `Index` specifies the index of the capability to test. `Index` must be between zero and the count of indexed capabilities for `Cap`. Initially all capabilities except `?GL_DITHER` are disabled; `?GL_DITHER` is initially enabled.

isFramebuffer(Framebuffer)

`gl:isFramebuffer/1` returns `?GL_TRUE` if `Framebuffer` is currently the name of a framebuffer object. If `Framebuffer` is zero, or if `?framebuffer` is not the name of a framebuffer object, or if an error occurs, `gl:isFramebuffer/1` returns `?GL_FALSE`. If `Framebuffer` is a name returned by `gl:genFramebuffers/1`, by that has not yet been bound through a call to `gl:bindFramebuffer/2`, then the name is not a framebuffer object and `gl:isFramebuffer/1` returns `?GL_FALSE`.

isList(List)

`gl:isList/1` returns `?GL_TRUE` if `List` is the name of a display list and returns `?GL_FALSE` if it is not, or if an error occurs.

isProgram(Program)

`gl:isProgram/1` returns `?GL_TRUE` if `Program` is the name of a program object previously created with `gl:createProgram/0` and not yet deleted with `gl:deleteProgram/1`. If `Program` is zero or a non-zero value that is not the name of a program object, or if an error occurs, `gl:isProgram/1` returns `?GL_FALSE`.

isProgramPipeline(Pipeline)

`gl:isProgramPipeline/1` returns `?GL_TRUE` if `Pipeline` is currently the name of a program pipeline object. If `Pipeline` is zero, or if `?pipeline` is not the name of a program pipeline object, or if an error occurs, `gl:isProgramPipeline/1` returns `?GL_FALSE`. If `Pipeline` is a name returned by `gl:genProgramPipelines/1`, but that has not yet been bound through a call to `gl:bindProgramPipeline/1`, then the name is not a program pipeline object and `gl:isProgramPipeline/1` returns `?GL_FALSE`.

isQuery(Id)

`gl:isQuery/1` returns `?GL_TRUE` if `Id` is currently the name of a query object. If `Id` is zero, or is a non-zero value that is not currently the name of a query object, or if an error occurs, `gl:isQuery/1` returns `?GL_FALSE`.

isRenderbuffer(Renderbuffer)

`gl:isRenderbuffer/1` returns `?GL_TRUE` if `Renderbuffer` is currently the name of a renderbuffer object. If `Renderbuffer` is zero, or if `Renderbuffer` is not the name of a renderbuffer object, or if an error occurs, `gl:isRenderbuffer/1` returns `?GL_FALSE`. If `Renderbuffer` is a name returned by `gl:genRenderbuffers/1`, by that has not yet been bound through a call to `gl:bindRenderbuffer/2` or `gl:framebufferRenderbuffer/4`, then the name is not a renderbuffer object and `gl:isRenderbuffer/1` returns `?GL_FALSE`.

isSampler(Sampler)

`gl:isSampler/1` returns `?GL_TRUE` if `Id` is currently the name of a sampler object. If `Id` is zero, or is a non-zero value that is not currently the name of a sampler object, or if an error occurs, `gl:isSampler/1` returns `?GL_FALSE`.

isShader(Shader)

`gl:isShader/1` returns `?GL_TRUE` if `Shader` is the name of a shader object previously created with `gl:createShader/1` and not yet deleted with `gl:deleteShader/1`. If `Shader` is zero or a non-zero value that is not the name of a shader object, or if an error occurs, `glIsShader`returns `?GL_FALSE`.

isSync(Sync)

`gl:isSync/1` returns `?GL_TRUE` if `Sync` is currently the name of a sync object. If `Sync` is not the name of a sync object, or if an error occurs, `gl:isSync/1` returns `?GL_FALSE`. Note that zero is not the name of a sync object.

isTexture(Texture)

`gl:isTexture/1` returns `?GL_TRUE` if `Texture` is currently the name of a texture. If `Texture` is zero, or is a non-zero value that is not currently the name of a texture, or if an error occurs, `gl:isTexture/1` returns `?GL_FALSE`.

isTransformFeedback(Id)

`gl:isTransformFeedback/1` returns `?GL_TRUE` if `Id` is currently the name of a transform feedback object. If `Id` is zero, or if `?id` is not the name of a transform feedback object, or if an error occurs, `gl:isTransformFeedback/1` returns `?GL_FALSE`. If `Id` is a name returned by `gl:genTransformFeedbacks/1`, but that has not yet been bound through a call to `gl:bindTransformFeedback/2`, then the name is not a transform feedback object and `gl:isTransformFeedback/1` returns `?GL_FALSE`.

isVertexArray(Array)

`gl:isVertexArray/1` returns `?GL_TRUE` if `Array` is currently the name of a vertex array object. If `Array` is zero, or if `Array` is not the name of a vertex array object, or if an error occurs, `gl:isVertexArray/1` returns `?GL_FALSE`. If `Array` is a name returned by `gl:genVertexArrays/1`, by that has not yet been bound through a call to `gl:bindVertexArray/1`, then the name is not a vertex array object and `gl:isVertexArray/1` returns `?GL_FALSE`.

lightf(Light, Pname, Param)

Equivalent to `lightiv/3`.

lightfv(Light, Pname, Params)

Equivalent to `lightiv/3`.

lighti(Light, Pname, Param)

Equivalent to `lightiv/3`.

lightiv(Light, Pname, Params)

`gl:light()` sets the values of individual light source parameters. `Light` names the light and is a symbolic name of the form `?GL_LIGHT` i, where i ranges from 0 to the value of `?GL_MAX_LIGHTS` - 1. `Pname` specifies one of ten light source parameters, again by symbolic name. `Params` is either a single value or a pointer to an array that contains the new values.

lightModelf(Pname, Param)

Equivalent to `lightModeliv/2`.

lightModelfv(Pname, Params)

Equivalent to `lightModeliv/2`.

lightModeli(Pname, Param)

Equivalent to `lightModeliv/2`.

lightModeliv(Pname, Params)

`gl:lightModel()` sets the lighting model parameter. `Pname` names a parameter and `Params` gives the new value. There are three lighting model parameters

lineStipple(Factor, Pattern)

Line stippling masks out certain fragments produced by rasterization; those fragments will not be drawn. The masking is achieved by using three parameters: the 16-bit line stipple pattern `Pattern`, the repeat count `Factor`, and an integer stipple counter s.

lineWidth(Width)

`gl:lineWidth/1` specifies the rasterized width of both aliased and antialiased lines. Using a line width other than 1 has different effects, depending on whether line antialiasing is enabled. To enable and disable line antialiasing, call `gl:enable/1` and `gl:disable/1` with argument `?GL_LINE_SMOOTH`. Line antialiasing is initially disabled.

linkProgram(Program)

`gl:linkProgram/1` links the program object specified by `Program`. If any shader objects of type `?GL_VERTEX_SHADER` are attached to `Program`, they will be used to create an executable that will run on the programmable vertex processor. If any shader objects of type `?GL_GEOMETRY_SHADER` are attached to `Program`, they will be used to create an executable that will run on the programmable geometry processor. If any shader objects of type `?GL_FRAGMENT_SHADER` are attached to `Program`, they will be used to create an executable that will run on the programmable fragment processor.

listBase(Base)

`gl:callLists/1` specifies an array of offsets. Display-list names are generated by adding `Base` to each offset. Names that reference valid display lists are executed; the others are ignored.

loadIdentity()

`gl:loadIdentity/0` replaces the current matrix with the identity matrix. It is semantically equivalent to calling `gl:loadMatrix()` with the identity matrix

loadMatrixd(M)

Equivalent to `loadMatrixf/1`.

loadMatrixf(M)

`gl:loadMatrix()` replaces the current matrix with the one whose elements are specified by `M`. The current matrix is the projection matrix, modelview matrix, or texture matrix, depending on the current matrix mode (see `gl:matrixMode/1`).

loadName(Name)

The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers and is initially empty.

loadTransposeMatrixd(M)

Equivalent to `loadTransposeMatrixf/1`.

loadTransposeMatrixf(M)

`gl:loadTransposeMatrix()` replaces the current matrix with the one whose elements are specified by `M`. The current matrix is the projection matrix, modelview matrix, or texture matrix, depending on the current matrix mode (see `gl:matrixMode/1`).

logicOp(Opcode)

`gl:logicOp/1` specifies a logical operation that, when enabled, is applied between the incoming RGBA color and the RGBA color at the corresponding location in the frame buffer. To enable or disable the logical operation, call `gl:enable/1` and `gl:disable/1` using the symbolic constant `?GL_COLOR_LOGIC_OP`. The initial value is disabled.

map1d(Target, U1, U2, Stride, Order, Points)

Equivalent to `map1f/6`.

map1f(Target, U1, U2, Stride, Order, Points)

Evaluators provide a way to use polynomial or rational polynomial mapping to produce vertices, normals, texture coordinates, and colors. The values produced by an evaluator are sent to further stages of GL processing just as if they had been presented using `gl:vertex()`, `gl:normal()`, `gl:texCoord()`, and `gl:color()` commands, except that the generated values do not update the current normal, texture coordinates, or color.

map2d(Target, U1, U2, Ustride, Uorder, V1, V2, Vstride, Vorder, Points)

Equivalent to `map2f/10`.

map2f(Target, U1, U2, Ustride, Uorder, V1, V2, Vstride, Vorder, Points)

Evaluators provide a way to use polynomial or rational polynomial mapping to produce vertices, normals, texture coordinates, and colors. The values produced by an evaluator are sent on to further stages of GL processing just as if they had been presented using `gl:vertex()`, `gl:normal()`, `gl:texCoord()`, and `gl:color()` commands, except that the generated values do not update the current normal, texture coordinates, or color.

mapGrid1d(Un, U1, U2)

Equivalent to `mapGrid2f/6`.

mapGrid1f(Un, U1, U2)

Equivalent to `mapGrid2f/6`.

mapGrid2d(Un, U1, U2, Vn, V1, V2)

Equivalent to `mapGrid2f/6`.

mapGrid2f(Un, U1, U2, Vn, V1, V2)

`gl:mapGrid()` and `gl:evalMesh()` are used together to efficiently generate and evaluate a series of evenly-spaced map domain values. `gl:evalMesh()` steps through the integer domain of a one- or two-dimensional grid, whose range is the domain of the evaluation maps specified by `glMap1` and `glMap2`.

materialf(Face, Pname, Param)

Equivalent to `materialiv/3`.

materialfv(Face, Pname, Params)

Equivalent to `materialiv/3`.

materiali(Face, Pname, Param)

Equivalent to `materialiv/3`.

materialiv(Face, Pname, Params)

`gl:material()` assigns values to material parameters. There are two matched sets of material parameters. One, the `front-facing` set, is used to shade points, lines, bitmaps, and all polygons (when two-sided lighting is disabled), or just front-facing polygons (when two-sided lighting is enabled). The other set, `back-facing`, is used to shade back-facing polygons only when two-sided lighting is enabled. Refer to the `gl:lightModel()` reference page for details concerning one- and two-sided lighting calculations.

matrixMode(Mode)

`gl:matrixMode/1` sets the current matrix mode. `Mode` can assume one of four values

memoryBarrier(Barriers)

Equivalent to `memoryBarrierByRegion/1`.

memoryBarrierByRegion(Barriers)

`gl:memoryBarrier/1` defines a barrier ordering the memory transactions issued prior to the command relative to those issued after the barrier. For the purposes of this ordering, memory transactions performed by shaders are considered to be issued by the rendering command that triggered the execution of the shader. `Barriers` is a bitfield indicating the set of operations that are synchronized with shader stores; the bits used in `Barriers` are as follows

minmax(Target, Internalformat, Sink)

When `?GL_MINMAX` is enabled, the RGBA components of incoming pixels are compared to the minimum and maximum values for each component, which are stored in the two-element minmax table. (The first element stores the minima, and the second element stores the maxima.) If a pixel component is greater than the corresponding component in the maximum element, then the maximum element is updated with the pixel component value. If a pixel component is less than the corresponding component in the minimum element, then the minimum element is updated with the pixel component value. (In both cases, if the internal format of the minmax table includes luminance, then the R color component of incoming pixels is used for comparison.) The contents of the minmax table may be retrieved at a later time by calling `gl:getMinmax/5`. The minmax operation is enabled or disabled by calling `gl:enable/1` or `gl:disable/1`, respectively, with an argument of `?GL_MINMAX`.

minSampleShading(Value)

`gl:minSampleShading/1` specifies the rate at which samples are shaded within a covered pixel. Sample-rate shading is enabled by calling `gl:enable/1` with the parameter `?GL_SAMPLE_SHADING`. If `?GL_MULTISAMPLE` or `?GL_SAMPLE_SHADING` is disabled, sample shading has no effect. Otherwise, an implementation must provide at least as many unique color values for each covered fragment as specified by `Value` times `Samples` where `Samples` is the value of `?GL_SAMPLES` for the current framebuffer. At least 1 sample for each covered fragment is generated.

multiDrawArrays(Mode, First, Count)

`gl:multiDrawArrays/3` specifies multiple sets of geometric primitives with very few subroutine calls. Instead of calling a GL procedure to pass each individual vertex, normal, texture coordinate, edge flag, or color, you can prespecify separate arrays of vertices, normals, and colors and use them to construct a sequence of primitives with a single call to `gl:multiDrawArrays/3`.

multiDrawArraysIndirect(Mode, Indirect, Drawcount, Stride)

`gl:multiDrawArraysIndirect/4` specifies multiple geometric primitives with very few subroutine calls. `gl:multiDrawArraysIndirect/4` behaves similarly to a multitude of calls to `gl:drawArraysInstancedBaseInstance/5`, execept that the parameters to each call to `gl:drawArraysInstancedBaseInstance/5` are stored in an array in memory at the address given by `Indirect`, separated by the stride, in basic machine units, specified by `Stride`. If `Stride` is zero, then the array is assumed to be tightly packed in memory.

multiDrawArraysIndirectCount(Mode, Indirect, Drawcount, Maxdrawcount, Stride)

No documentation available.

multiTexCoord1d(Target, S)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord1dv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord1f(Target, S)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord1fv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord1i(Target, S)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord1iv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord1s(Target, S)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord1sv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord2d(Target, S, T)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord2dv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord2f(Target, S, T)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord2fv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord2i(Target, S, T)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord2iv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord2s(Target, S, T)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord2sv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord3d(Target, S, T, R)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord3dv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord3f(Target, S, T, R)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord3fv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord3i(Target, S, T, R)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord3iv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord3s(Target, S, T, R)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord3sv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord4d(Target, S, T, R, Q)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord4dv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord4f(Target, S, T, R, Q)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord4fv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord4i(Target, S, T, R, Q)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord4iv/2

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord4s(Target, S, T, R, Q)

Equivalent to `multiTexCoord4sv/2`.

multiTexCoord4sv/2

`gl:multiTexCoord()` specifies texture coordinates in one, two, three, or four dimensions. `gl:multiTexCoord1()` sets the current texture coordinates to (s 0 0 1); a call to `gl:multiTexCoord2()` sets them to (s t 0 1). Similarly, `gl:multiTexCoord3()` specifies the texture coordinates as (s t r 1), and `gl:multiTexCoord4()` defines all four components explicitly as (s t r q).

multMatrixd(M)

Equivalent to `multMatrixf/1`.

multMatrixf(M)

`gl:multMatrix()` multiplies the current matrix with the one specified using `M`, and replaces the current matrix with the product.

multTransposeMatrixd(M)

Equivalent to `multTransposeMatrixf/1`.

multTransposeMatrixf(M)

`gl:multTransposeMatrix()` multiplies the current matrix with the one specified using `M`, and replaces the current matrix with the product.

newList(List, Mode)

Display lists are groups of GL commands that have been stored for subsequent execution. Display lists are created with `gl:newList/2`. All subsequent commands are placed in the display list, in the order issued, until `gl:endList/0` is called.

normal3b(Nx, Ny, Nz)

Equivalent to `normal3sv/1`.

normal3bv/1

Equivalent to `normal3sv/1`.

normal3d(Nx, Ny, Nz)

Equivalent to `normal3sv/1`.

normal3dv/1

Equivalent to `normal3sv/1`.

normal3f(Nx, Ny, Nz)

Equivalent to `normal3sv/1`.

normal3fv/1

Equivalent to `normal3sv/1`.

normal3i(Nx, Ny, Nz)

Equivalent to `normal3sv/1`.

normal3iv/1

Equivalent to `normal3sv/1`.

normal3s(Nx, Ny, Nz)

Equivalent to `normal3sv/1`.

normal3sv/1

The current normal is set to the given coordinates whenever `gl:normal()` is issued. Byte, short, or integer arguments are converted to floating-point format with a linear mapping that maps the most positive representable integer value to 1.0 and the most negative representable integer value to -1.0.

normalPointer(Type, Stride, Ptr)

`gl:normalPointer/3` specifies the location and data format of an array of normals to use when rendering. `Type` specifies the data type of each normal coordinate, and `Stride` specifies the byte stride from one normal to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays. (Single-array storage may be more efficient on some implementations; see `gl:interleavedArrays/3`.)

objectPtrLabel(Ptr, Length, Label)

`gl:objectPtrLabel/3` labels the sync object identified by `Ptr`.

ortho(Left, Right, Bottom, Top, Near_val, Far_val)

`gl:ortho/6` describes a transformation that produces a parallel projection. The current matrix (see `gl:matrixMode/1`) is multiplied by this matrix and the result replaces the current matrix, as if `gl:multMatrix()` were called with the following matrix as its argument

passThrough(Token)

External documentation.

patchParameterfv(Pname, Values)

Equivalent to `patchParameteri/2`.

patchParameteri(Pname, Value)

`gl:patchParameter()` specifies the parameters that will be used for patch primitives. `Pname` specifies the parameter to modify and must be either `?GL_PATCH_VERTICES`, `?GL_PATCH_DEFAULT_OUTER_LEVEL` or `?GL_PATCH_DEFAULT_INNER_LEVEL`. For `gl:patchParameteri/2`, `Value` specifies the new value for the parameter specified by `Pname`. For `gl:patchParameterfv/2`, `Values` specifies the address of an array containing the new values for the parameter specified by `Pname`.

pauseTransformFeedback()

`gl:pauseTransformFeedback/0` pauses transform feedback operations on the currently active transform feedback object. When transform feedback operations are paused, transform feedback is still considered active and changing most transform feedback state related to the object results in an error. However, a new transform feedback object may be bound while transform feedback is paused.

pixelMapfv(Map, Mapsize, Values)

Equivalent to `pixelMapusv/3`.

pixelMapuiv(Map, Mapsize, Values)

Equivalent to `pixelMapusv/3`.

pixelMapusv(Map, Mapsize, Values)

`gl:pixelMap()` sets up translation tables, or `maps`, used by `gl:copyPixels/5`, `gl:copyTexImage1D/7`, `gl:copyTexImage2D/8`, `gl:copyTexSubImage1D/6`, `gl:copyTexSubImage2D/8`, `gl:copyTexSubImage3D/9`, `gl:drawPixels/5`, `gl:readPixels/7`, `gl:texImage1D/8`, `gl:texImage2D/9`, `gl:texImage3D/10`, `gl:texSubImage1D/7`, `gl:texSubImage2D/9`, and `gl:texSubImage3D/11`. Additionally, if the ARB_imaging subset is supported, the routines `gl:colorTable/6`, `gl:colorSubTable/6`, `gl:convolutionFilter1D/6`, `gl:convolutionFilter2D/7`, `gl:histogram/4`, `gl:minmax/3`, and `gl:separableFilter2D/8`. Use of these maps is described completely in the `gl:pixelTransfer()` reference page, and partly in the reference pages for the pixel and texture image commands. Only the specification of the maps is described in this reference page.

pixelStoref(Pname, Param)

Equivalent to `pixelStorei/2`.

pixelStorei(Pname, Param)

`gl:pixelStore()` sets pixel storage modes that affect the operation of subsequent `gl:readPixels/7` as well as the unpacking of texture patterns (see `gl:texImage1D/8`, `gl:texImage2D/9`, `gl:texImage3D/10`, `gl:texSubImage1D/7`, `gl:texSubImage2D/9`, `gl:texSubImage3D/11`), `gl:compressedTexImage1D/7`, `gl:compressedTexImage2D/8`, `gl:compressedTexImage3D/9`, `gl:compressedTexSubImage1D/7`, `gl:compressedTexSubImage2D/9` or `gl:compressedTexSubImage1D/7`.

pixelTransferf(Pname, Param)

Equivalent to `pixelTransferi/2`.

pixelTransferi(Pname, Param)

`gl:pixelTransfer()` sets pixel transfer modes that affect the operation of subsequent `gl:copyPixels/5`, `gl:copyTexImage1D/7`, `gl:copyTexImage2D/8`, `gl:copyTexSubImage1D/6`, `gl:copyTexSubImage2D/8`, `gl:copyTexSubImage3D/9`, `gl:drawPixels/5`, `gl:readPixels/7`, `gl:texImage1D/8`, `gl:texImage2D/9`, `gl:texImage3D/10`, `gl:texSubImage1D/7`, `gl:texSubImage2D/9`, and `gl:texSubImage3D/11` commands. Additionally, if the ARB_imaging subset is supported, the routines `gl:colorTable/6`, `gl:colorSubTable/6`, `gl:convolutionFilter1D/6`, `gl:convolutionFilter2D/7`, `gl:histogram/4`, `gl:minmax/3`, and `gl:separableFilter2D/8` are also affected. The algorithms that are specified by pixel transfer modes operate on pixels after they are read from the frame buffer (`gl:copyPixels/5` `gl:copyTexImage1D/7`, `gl:copyTexImage2D/8`, `gl:copyTexSubImage1D/6`, `gl:copyTexSubImage2D/8`, `gl:copyTexSubImage3D/9`, and `gl:readPixels/7`), or unpacked from client memory (`gl:drawPixels/5`, `gl:texImage1D/8`, `gl:texImage2D/9`, `gl:texImage3D/10`, `gl:texSubImage1D/7`, `gl:texSubImage2D/9`, and `gl:texSubImage3D/11`). Pixel transfer operations happen in the same order, and in the same manner, regardless of the command that resulted in the pixel operation. Pixel storage modes (see `gl:pixelStore()`) control the unpacking of pixels being read from client memory and the packing of pixels being written back into client memory.

pixelZoom(Xfactor, Yfactor)

`gl:pixelZoom/2` specifies values for the x and y zoom factors. During the execution of `gl:drawPixels/5` or `gl:copyPixels/5`, if ( xr, yr) is the current raster position, and a given element is in the mth row and nth column of the pixel rectangle, then pixels whose centers are in the rectangle with corners at

pointParameterf(Pname, Param)

Equivalent to `pointParameteriv/2`.

pointParameterfv(Pname, Params)

Equivalent to `pointParameteriv/2`.

pointParameteri(Pname, Param)

Equivalent to `pointParameteriv/2`.

pointParameteriv(Pname, Params)

The following values are accepted for `Pname`

pointSize(Size)

`gl:pointSize/1` specifies the rasterized diameter of points. If point size mode is disabled (see `gl:enable/1` with parameter `?GL_PROGRAM_POINT_SIZE`), this value will be used to rasterize points. Otherwise, the value written to the shading language built-in variable gl_PointSize will be used.

polygonMode(Face, Mode)

`gl:polygonMode/2` controls the interpretation of polygons for rasterization. `Face` describes which polygons `Mode` applies to: both front and back-facing polygons (`?GL_FRONT_AND_BACK`). The polygon mode affects only the final rasterization of polygons. In particular, a polygon's vertices are lit and the polygon is clipped and possibly culled before these modes are applied.

polygonOffset(Factor, Units)

When `?GL_POLYGON_OFFSET_FILL`, `?GL_POLYGON_OFFSET_LINE`, or `?GL_POLYGON_OFFSET_POINT` is enabled, each fragment's `depth` value will be offset after it is interpolated from the `depth` values of the appropriate vertices. The value of the offset is factor×DZ+r×units, where DZ is a measurement of the change in depth relative to the screen area of the polygon, and r is the smallest value that is guaranteed to produce a resolvable offset for a given implementation. The offset is added before the depth test is performed and before the value is written into the depth buffer.

polygonOffsetClamp(Factor, Units, Clamp)

No documentation available.

polygonStipple(Mask)

Polygon stippling, like line stippling (see `gl:lineStipple/2`), masks out certain fragments produced by rasterization, creating a pattern. Stippling is independent of polygon antialiasing.

popAttrib()

Equivalent to `pushAttrib/1`.

popClientAttrib()

Equivalent to `pushClientAttrib/1`.

popDebugGroup()

Equivalent to `pushDebugGroup/4`.

popMatrix()

Equivalent to `pushMatrix/0`.

popName()

Equivalent to `pushName/1`.

primitiveRestartIndex(Index)

`gl:primitiveRestartIndex/1` specifies a vertex array element that is treated specially when primitive restarting is enabled. This is known as the primitive restart index.

prioritizeTextures(Textures, Priorities)

`gl:prioritizeTextures/2` assigns the `N` texture priorities given in `Priorities` to the `N` textures named in `Textures`.

programBinary(Program, BinaryFormat, Binary)

`gl:programBinary/3` loads a program object with a program binary previously returned from `gl:getProgramBinary/2`. `BinaryFormat` and `Binary` must be those returned by a previous call to `gl:getProgramBinary/2`, and `Length` must be the length returned by `gl:getProgramBinary/2`, or by `gl:getProgram()` when called with `Pname` set to `?GL_PROGRAM_BINARY_LENGTH`. If these conditions are not met, loading the program binary will fail and `Program`'s `?GL_LINK_STATUS` will be set to `?GL_FALSE`.

programParameteri(Program, Pname, Value)

`gl:programParameter()` specifies a new value for the parameter nameed by `Pname` for the program object `Program`.

programUniform1d(Program, Location, V0)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform1dv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform1f(Program, Location, V0)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform1fv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform1i(Program, Location, V0)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform1iv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform1ui(Program, Location, V0)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform1uiv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform2d(Program, Location, V0, V1)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform2dv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform2f(Program, Location, V0, V1)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform2fv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform2i(Program, Location, V0, V1)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform2iv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform2ui(Program, Location, V0, V1)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform2uiv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform3d(Program, Location, V0, V1, V2)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform3dv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform3f(Program, Location, V0, V1, V2)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform3fv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform3i(Program, Location, V0, V1, V2)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform3iv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform3ui(Program, Location, V0, V1, V2)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform3uiv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform4d(Program, Location, V0, V1, V2, V3)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform4dv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform4f(Program, Location, V0, V1, V2, V3)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform4fv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform4i(Program, Location, V0, V1, V2, V3)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform4iv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform4ui(Program, Location, V0, V1, V2, V3)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniform4uiv(Program, Location, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix2dv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix2fv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix2x3dv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix2x3fv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix2x4dv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix2x4fv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix3dv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix3fv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix3x2dv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix3x2fv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix3x4dv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix3x4fv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix4dv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix4fv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix4x2dv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix4x2fv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix4x3dv(Program, Location, Transpose, Value)

Equivalent to `programUniformMatrix4x3fv/4`.

programUniformMatrix4x3fv(Program, Location, Transpose, Value)

`gl:programUniform()` modifies the value of a uniform variable or a uniform variable array. The location of the uniform variable to be modified is specified by `Location`, which should be a value returned by `gl:getUniformLocation/2`. `gl:programUniform()` operates on the program object specified by `Program`.

provokingVertex(Mode)

`Flatshading` a vertex shader varying output means to assign all vetices of the primitive the same value for that output. The vertex from which these values is derived is known as the `provoking vertex` and `gl:provokingVertex/1` specifies which vertex is to be used as the source of data for flat shaded varyings.

pushAttrib(Mask)

`gl:pushAttrib/1` takes one argument, a mask that indicates which groups of state variables to save on the attribute stack. Symbolic constants are used to set bits in the mask. `Mask` is typically constructed by specifying the bitwise-or of several of these constants together. The special mask `?GL_ALL_ATTRIB_BITS` can be used to save all stackable states.

pushClientAttrib(Mask)

`gl:pushClientAttrib/1` takes one argument, a mask that indicates which groups of client-state variables to save on the client attribute stack. Symbolic constants are used to set bits in the mask. `Mask` is typically constructed by specifying the bitwise-or of several of these constants together. The special mask `?GL_CLIENT_ALL_ATTRIB_BITS` can be used to save all stackable client state.

pushDebugGroup(Source, Id, Length, Message)

`gl:pushDebugGroup/4` pushes a debug group described by the string `Message` into the command stream. The value of `Id` specifies the ID of messages generated. The parameter `Length` contains the number of characters in `Message`. If `Length` is negative, it is implied that `Message` contains a null terminated string. The message has the specified `Source` and `Id`, the `Type``?GL_DEBUG_TYPE_PUSH_GROUP`, and `Severity``?GL_DEBUG_SEVERITY_NOTIFICATION`. The GL will put a new debug group on top of the debug group stack which inherits the control of the volume of debug output of the debug group previously residing on the top of the debug group stack. Because debug groups are strictly hierarchical, any additional control of the debug output volume will only apply within the active debug group and the debug groups pushed on top of the active debug group.

pushMatrix()

There is a stack of matrices for each of the matrix modes. In `?GL_MODELVIEW` mode, the stack depth is at least 32. In the other modes, `?GL_COLOR`, `?GL_PROJECTION`, and `?GL_TEXTURE`, the depth is at least 2. The current matrix in any mode is the matrix on the top of the stack for that mode.

pushName(Name)

The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers and is initially empty.

queryCounter(Id, Target)

`gl:queryCounter/2` causes the GL to record the current time into the query object named `Id`. `Target` must be `?GL_TIMESTAMP`. The time is recorded after all previous commands on the GL client and server state and the framebuffer have been fully realized. When the time is recorded, the query result for that object is marked available. `gl:queryCounter/2` timer queries can be used within a `gl:beginQuery/2` / `gl:endQuery/1` block where the target is `?GL_TIME_ELAPSED` and it does not affect the result of that query object.

rasterPos2d(X, Y)

Equivalent to `rasterPos4sv/1`.

rasterPos2dv/1

Equivalent to `rasterPos4sv/1`.

rasterPos2f(X, Y)

Equivalent to `rasterPos4sv/1`.

rasterPos2fv/1

Equivalent to `rasterPos4sv/1`.

rasterPos2i(X, Y)

Equivalent to `rasterPos4sv/1`.

rasterPos2iv/1

Equivalent to `rasterPos4sv/1`.

rasterPos2s(X, Y)

Equivalent to `rasterPos4sv/1`.

rasterPos2sv/1

Equivalent to `rasterPos4sv/1`.

rasterPos3d(X, Y, Z)

Equivalent to `rasterPos4sv/1`.

rasterPos3dv/1

Equivalent to `rasterPos4sv/1`.

rasterPos3f(X, Y, Z)

Equivalent to `rasterPos4sv/1`.

rasterPos3fv/1

Equivalent to `rasterPos4sv/1`.

rasterPos3i(X, Y, Z)

Equivalent to `rasterPos4sv/1`.

rasterPos3iv/1

Equivalent to `rasterPos4sv/1`.

rasterPos3s(X, Y, Z)

Equivalent to `rasterPos4sv/1`.

rasterPos3sv/1

Equivalent to `rasterPos4sv/1`.

rasterPos4d(X, Y, Z, W)

Equivalent to `rasterPos4sv/1`.

rasterPos4dv/1

Equivalent to `rasterPos4sv/1`.

rasterPos4f(X, Y, Z, W)

Equivalent to `rasterPos4sv/1`.

rasterPos4fv/1

Equivalent to `rasterPos4sv/1`.

rasterPos4i(X, Y, Z, W)

Equivalent to `rasterPos4sv/1`.

rasterPos4iv/1

Equivalent to `rasterPos4sv/1`.

rasterPos4s(X, Y, Z, W)

Equivalent to `rasterPos4sv/1`.

rasterPos4sv/1

The GL maintains a 3D position in window coordinates. This position, called the raster position, is used to position pixel and bitmap write operations. It is maintained with subpixel accuracy. See `gl:bitmap/7`, `gl:drawPixels/5`, and `gl:copyPixels/5`.

readBuffer(Mode)

`gl:readBuffer/1` specifies a color buffer as the source for subsequent `gl:readPixels/7`, `gl:copyTexImage1D/7`, `gl:copyTexImage2D/8`, `gl:copyTexSubImage1D/6`, `gl:copyTexSubImage2D/8`, and `gl:copyTexSubImage3D/9` commands. `Mode` accepts one of twelve or more predefined values. In a fully configured system, `?GL_FRONT`, `?GL_LEFT`, and `?GL_FRONT_LEFT` all name the front left buffer, `?GL_FRONT_RIGHT` and `?GL_RIGHT` name the front right buffer, and `?GL_BACK_LEFT` and `?GL_BACK` name the back left buffer. Further more, the constants `?GL_COLOR_ATTACHMENT``i` may be used to indicate the `i`th color attachment where `i` ranges from zero to the value of `?GL_MAX_COLOR_ATTACHMENTS` minus one.

readPixels(X, Y, Width, Height, Format, Type, Pixels)

`gl:readPixels/7` and `glReadnPixels` return pixel data from the frame buffer, starting with the pixel whose lower left corner is at location (`X`, `Y`), into client memory starting at location `Data`. Several parameters control the processing of the pixel data before it is placed into client memory. These parameters are set with `gl:pixelStore()`. This reference page describes the effects on `gl:readPixels/7` and `glReadnPixels` of most, but not all of the parameters specified by these three commands.

rectd(X1, Y1, X2, Y2)

Equivalent to `rectsv/2`.

rectdv(V1, V2)

Equivalent to `rectsv/2`.

rectf(X1, Y1, X2, Y2)

Equivalent to `rectsv/2`.

rectfv(V1, V2)

Equivalent to `rectsv/2`.

recti(X1, Y1, X2, Y2)

Equivalent to `rectsv/2`.

rectiv(V1, V2)

Equivalent to `rectsv/2`.

rects(X1, Y1, X2, Y2)

Equivalent to `rectsv/2`.

rectsv(V1, V2)

`gl:rect()` supports efficient specification of rectangles as two corner points. Each rectangle command takes four arguments, organized either as two consecutive pairs of (x y) coordinates or as two pointers to arrays, each containing an (x y) pair. The resulting rectangle is defined in the z=0 plane.

releaseShaderCompiler()

`gl:releaseShaderCompiler/0` provides a hint to the implementation that it may free internal resources associated with its shader compiler. `gl:compileShader/1` may subsequently be called and the implementation may at that time reallocate resources previously freed by the call to `gl:releaseShaderCompiler/0`.

renderbufferStorage(Target, Internalformat, Width, Height)

`gl:renderbufferStorage/4` is equivalent to calling `gl:renderbufferStorageMultisample/5` with the `Samples` set to zero, and `glNamedRenderbufferStorage` is equivalent to calling `glNamedRenderbufferStorageMultisample` with the samples set to zero.

renderbufferStorageMultisample(Target, Samples, Internalformat, Width, Height)

`gl:renderbufferStorageMultisample/5` and `glNamedRenderbufferStorageMultisample` establish the data storage, format, dimensions and number of samples of a renderbuffer object's image.

renderMode(Mode)

`gl:renderMode/1` sets the rasterization mode. It takes one argument, `Mode`, which can assume one of three predefined values

resetHistogram(Target)

`gl:resetHistogram/1` resets all the elements of the current histogram table to zero.

resetMinmax(Target)

`gl:resetMinmax/1` resets the elements of the current minmax table to their initial values: the ``maximum'' element receives the minimum possible component values, and the ``minimum'' element receives the maximum possible component values.

resumeTransformFeedback()

`gl:resumeTransformFeedback/0` resumes transform feedback operations on the currently active transform feedback object. When transform feedback operations are paused, transform feedback is still considered active and changing most transform feedback state related to the object results in an error. However, a new transform feedback object may be bound while transform feedback is paused.

rotated(Angle, X, Y, Z)

Equivalent to `rotatef/4`.

rotatef(Angle, X, Y, Z)

`gl:rotate()` produces a rotation of `Angle` degrees around the vector (x y z). The current matrix (see `gl:matrixMode/1`) is multiplied by a rotation matrix with the product replacing the current matrix, as if `gl:multMatrix()` were called with the following matrix as its argument

sampleCoverage(Value, Invert)

Multisampling samples a pixel multiple times at various implementation-dependent subpixel locations to generate antialiasing effects. Multisampling transparently antialiases points, lines, polygons, and images if it is enabled.

sampleMaski(MaskNumber, Mask)

`gl:sampleMaski/2` sets one 32-bit sub-word of the multi-word sample mask, `?GL_SAMPLE_MASK_VALUE`.

samplerParameterf(Sampler, Pname, Param)

Equivalent to `samplerParameteriv/3`.

samplerParameterfv(Sampler, Pname, Param)

Equivalent to `samplerParameteriv/3`.

samplerParameterIiv(Sampler, Pname, Param)

Equivalent to `samplerParameteriv/3`.

samplerParameterIuiv(Sampler, Pname, Param)

Equivalent to `samplerParameteriv/3`.

samplerParameteri(Sampler, Pname, Param)

Equivalent to `samplerParameteriv/3`.

samplerParameteriv(Sampler, Pname, Param)

`gl:samplerParameter()` assigns the value or values in `Params` to the sampler parameter specified as `Pname`. `Sampler` specifies the sampler object to be modified, and must be the name of a sampler object previously returned from a call to `gl:genSamplers/1`. The following symbols are accepted in `Pname`

scaled(X, Y, Z)

Equivalent to `scalef/3`.

scalef(X, Y, Z)

`gl:scale()` produces a nonuniform scaling along the `x`, `y`, and `z` axes. The three parameters indicate the desired scale factor along each of the three axes.

scissor(X, Y, Width, Height)

`gl:scissor/4` defines a rectangle, called the scissor box, in window coordinates. The first two arguments, `X` and `Y`, specify the lower left corner of the box. `Width` and `Height` specify the width and height of the box.

scissorArrayv(First, V)

`gl:scissorArrayv/2` defines rectangles, called scissor boxes, in window coordinates for each viewport. `First` specifies the index of the first scissor box to modify and `Count` specifies the number of scissor boxes to modify. `First` must be less than the value of `?GL_MAX_VIEWPORTS`, and `First` + `Count` must be less than or equal to the value of `?GL_MAX_VIEWPORTS`. `V` specifies the address of an array containing integers specifying the lower left corner of the scissor boxes, and the width and height of the scissor boxes, in that order.

scissorIndexed(Index, Left, Bottom, Width, Height)

Equivalent to `scissorIndexedv/2`.

scissorIndexedv(Index, V)

`gl:scissorIndexed/5` defines the scissor box for a specified viewport. `Index` specifies the index of scissor box to modify. `Index` must be less than the value of `?GL_MAX_VIEWPORTS`. For `gl:scissorIndexed/5`, `Left`, `Bottom`, `Width` and `Height` specify the left, bottom, width and height of the scissor box, in pixels, respectively. For `gl:scissorIndexedv/2`, `V` specifies the address of an array containing integers specifying the lower left corner of the scissor box, and the width and height of the scissor box, in that order.

secondaryColor3b(Red, Green, Blue)

Equivalent to `secondaryColor3usv/1`.

secondaryColor3bv/1

Equivalent to `secondaryColor3usv/1`.

secondaryColor3d(Red, Green, Blue)

Equivalent to `secondaryColor3usv/1`.

secondaryColor3dv/1

Equivalent to `secondaryColor3usv/1`.

secondaryColor3f(Red, Green, Blue)

Equivalent to `secondaryColor3usv/1`.

secondaryColor3fv/1

Equivalent to `secondaryColor3usv/1`.

secondaryColor3i(Red, Green, Blue)

Equivalent to `secondaryColor3usv/1`.

secondaryColor3iv/1

Equivalent to `secondaryColor3usv/1`.

secondaryColor3s(Red, Green, Blue)

Equivalent to `secondaryColor3usv/1`.

secondaryColor3sv/1

Equivalent to `secondaryColor3usv/1`.

secondaryColor3ub(Red, Green, Blue)

Equivalent to `secondaryColor3usv/1`.

secondaryColor3ubv/1

Equivalent to `secondaryColor3usv/1`.

secondaryColor3ui(Red, Green, Blue)

Equivalent to `secondaryColor3usv/1`.

secondaryColor3uiv/1

Equivalent to `secondaryColor3usv/1`.

secondaryColor3us(Red, Green, Blue)

Equivalent to `secondaryColor3usv/1`.

secondaryColor3usv/1

The GL stores both a primary four-valued RGBA color and a secondary four-valued RGBA color (where alpha is always set to 0.0) that is associated with every vertex.

secondaryColorPointer(Size, Type, Stride, Pointer)

`gl:secondaryColorPointer/4` specifies the location and data format of an array of color components to use when rendering. `Size` specifies the number of components per color, and must be 3. `Type` specifies the data type of each color component, and `Stride` specifies the byte stride from one color to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays.

selectBuffer(Size, Buffer)

`gl:selectBuffer/2` has two arguments: `Buffer` is a pointer to an array of unsigned integers, and `Size` indicates the size of the array. `Buffer` returns values from the name stack (see `gl:initNames/0`, `gl:loadName/1`, `gl:pushName/1`) when the rendering mode is `?GL_SELECT` (see `gl:renderMode/1`). `gl:selectBuffer/2` must be issued before selection mode is enabled, and it must not be issued while the rendering mode is `?GL_SELECT`.

separableFilter2D(Target, Internalformat, Width, Height, Format, Type, Row, Column)

`gl:separableFilter2D/8` builds a two-dimensional separable convolution filter kernel from two arrays of pixels.

shadeModel(Mode)

GL primitives can have either flat or smooth shading. Smooth shading, the default, causes the computed colors of vertices to be interpolated as the primitive is rasterized, typically assigning different colors to each resulting pixel fragment. Flat shading selects the computed color of just one vertex and assigns it to all the pixel fragments generated by rasterizing a single primitive. In either case, the computed color of a vertex is the result of lighting if lighting is enabled, or it is the current color at the time the vertex was specified if lighting is disabled.

shaderBinary(Shaders, Binaryformat, Binary)

`gl:shaderBinary/3` loads pre-compiled shader binary code into the `Count` shader objects whose handles are given in `Shaders`. `Binary` points to `Length` bytes of binary shader code stored in client memory. `BinaryFormat` specifies the format of the pre-compiled code.

shaderSource(Shader, String)

`gl:shaderSource/2` sets the source code in `Shader` to the source code in the array of strings specified by `String`. Any source code previously stored in the shader object is completely replaced. The number of strings in the array is specified by `Count`. If `Length` is `?NULL`, each string is assumed to be null terminated. If `Length` is a value other than `?NULL`, it points to an array containing a string length for each of the corresponding elements of `String`. Each element in the `Length` array may contain the length of the corresponding string (the null character is not counted as part of the string length) or a value less than 0 to indicate that the string is null terminated. The source code strings are not scanned or parsed at this time; they are simply copied into the specified shader object.

shaderStorageBlockBinding(Program, StorageBlockIndex, StorageBlockBinding)

`gl:shaderStorageBlockBinding/3`, changes the active shader storage block with an assigned index of `StorageBlockIndex` in program object `Program`. `StorageBlockIndex` must be an active shader storage block index in `Program`. `StorageBlockBinding` must be less than the value of `?GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS`. If successful, `gl:shaderStorageBlockBinding/3` specifies that `Program` will use the data store of the buffer object bound to the binding point `StorageBlockBinding` to read and write the values of the buffer variables in the shader storage block identified by `StorageBlockIndex`.

stencilFunc(Func, Ref, Mask)

Stenciling, like depth-buffering, enables and disables drawing on a per-pixel basis. Stencil planes are first drawn into using GL drawing primitives, then geometry and images are rendered using the stencil planes to mask out portions of the screen. Stenciling is typically used in multipass rendering algorithms to achieve special effects, such as decals, outlining, and constructive solid geometry rendering.

stencilFuncSeparate(Face, Func, Ref, Mask)

Stenciling, like depth-buffering, enables and disables drawing on a per-pixel basis. You draw into the stencil planes using GL drawing primitives, then render geometry and images, using the stencil planes to mask out portions of the screen. Stenciling is typically used in multipass rendering algorithms to achieve special effects, such as decals, outlining, and constructive solid geometry rendering.

stencilMask(Mask)

`gl:stencilMask/1` controls the writing of individual bits in the stencil planes. The least significant n bits of `Mask`, where n is the number of bits in the stencil buffer, specify a mask. Where a 1 appears in the mask, it's possible to write to the corresponding bit in the stencil buffer. Where a 0 appears, the corresponding bit is write-protected. Initially, all bits are enabled for writing.

stencilMaskSeparate(Face, Mask)

`gl:stencilMaskSeparate/2` controls the writing of individual bits in the stencil planes. The least significant n bits of `Mask`, where n is the number of bits in the stencil buffer, specify a mask. Where a 1 appears in the mask, it's possible to write to the corresponding bit in the stencil buffer. Where a 0 appears, the corresponding bit is write-protected. Initially, all bits are enabled for writing.

stencilOp(Fail, Zfail, Zpass)

Stenciling, like depth-buffering, enables and disables drawing on a per-pixel basis. You draw into the stencil planes using GL drawing primitives, then render geometry and images, using the stencil planes to mask out portions of the screen. Stenciling is typically used in multipass rendering algorithms to achieve special effects, such as decals, outlining, and constructive solid geometry rendering.

stencilOpSeparate(Face, Sfail, Dpfail, Dppass)

Stenciling, like depth-buffering, enables and disables drawing on a per-pixel basis. You draw into the stencil planes using GL drawing primitives, then render geometry and images, using the stencil planes to mask out portions of the screen. Stenciling is typically used in multipass rendering algorithms to achieve special effects, such as decals, outlining, and constructive solid geometry rendering.

texBuffer(Target, Internalformat, Buffer)

Equivalent to `textureBuffer/3`.

texBufferRange(Target, Internalformat, Buffer, Offset, Size)

Equivalent to `textureBufferRange/5`.

texCoord1d(S)

Equivalent to `texCoord4sv/1`.

texCoord1dv/1

Equivalent to `texCoord4sv/1`.

texCoord1f(S)

Equivalent to `texCoord4sv/1`.

texCoord1fv/1

Equivalent to `texCoord4sv/1`.

texCoord1i(S)

Equivalent to `texCoord4sv/1`.

texCoord1iv/1

Equivalent to `texCoord4sv/1`.

texCoord1s(S)

Equivalent to `texCoord4sv/1`.

texCoord1sv/1

Equivalent to `texCoord4sv/1`.

texCoord2d(S, T)

Equivalent to `texCoord4sv/1`.

texCoord2dv/1

Equivalent to `texCoord4sv/1`.

texCoord2f(S, T)

Equivalent to `texCoord4sv/1`.

texCoord2fv/1

Equivalent to `texCoord4sv/1`.

texCoord2i(S, T)

Equivalent to `texCoord4sv/1`.

texCoord2iv/1

Equivalent to `texCoord4sv/1`.

texCoord2s(S, T)

Equivalent to `texCoord4sv/1`.

texCoord2sv/1

Equivalent to `texCoord4sv/1`.

texCoord3d(S, T, R)

Equivalent to `texCoord4sv/1`.

texCoord3dv/1

Equivalent to `texCoord4sv/1`.

texCoord3f(S, T, R)

Equivalent to `texCoord4sv/1`.

texCoord3fv/1

Equivalent to `texCoord4sv/1`.

texCoord3i(S, T, R)

Equivalent to `texCoord4sv/1`.

texCoord3iv/1

Equivalent to `texCoord4sv/1`.

texCoord3s(S, T, R)

Equivalent to `texCoord4sv/1`.

texCoord3sv/1

Equivalent to `texCoord4sv/1`.

texCoord4d(S, T, R, Q)

Equivalent to `texCoord4sv/1`.

texCoord4dv/1

Equivalent to `texCoord4sv/1`.

texCoord4f(S, T, R, Q)

Equivalent to `texCoord4sv/1`.

texCoord4fv/1

Equivalent to `texCoord4sv/1`.

texCoord4i(S, T, R, Q)

Equivalent to `texCoord4sv/1`.

texCoord4iv/1

Equivalent to `texCoord4sv/1`.

texCoord4s(S, T, R, Q)

Equivalent to `texCoord4sv/1`.

texCoord4sv/1

`gl:texCoord()` specifies texture coordinates in one, two, three, or four dimensions. `gl:texCoord1()` sets the current texture coordinates to (s 0 0 1); a call to `gl:texCoord2()` sets them to (s t 0 1). Similarly, `gl:texCoord3()` specifies the texture coordinates as (s t r 1), and `gl:texCoord4()` defines all four components explicitly as (s t r q).

texCoordPointer(Size, Type, Stride, Ptr)

`gl:texCoordPointer/4` specifies the location and data format of an array of texture coordinates to use when rendering. `Size` specifies the number of coordinates per texture coordinate set, and must be 1, 2, 3, or 4. `Type` specifies the data type of each texture coordinate, and `Stride` specifies the byte stride from one texture coordinate set to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays. (Single-array storage may be more efficient on some implementations; see `gl:interleavedArrays/3`.)

texEnvf(Target, Pname, Param)

Equivalent to `texEnviv/3`.

texEnvfv(Target, Pname, Params)

Equivalent to `texEnviv/3`.

texEnvi(Target, Pname, Param)

Equivalent to `texEnviv/3`.

texEnviv(Target, Pname, Params)

A texture environment specifies how texture values are interpreted when a fragment is textured. When `Target` is `?GL_TEXTURE_FILTER_CONTROL`, `Pname` must be `?GL_TEXTURE_LOD_BIAS`. When `Target` is `?GL_TEXTURE_ENV`, `Pname` can be `?GL_TEXTURE_ENV_MODE`, `?GL_TEXTURE_ENV_COLOR`, `?GL_COMBINE_RGB`, `?GL_COMBINE_ALPHA`, `?GL_RGB_SCALE`, `?GL_ALPHA_SCALE`, `?GL_SRC0_RGB`, `?GL_SRC1_RGB`, `?GL_SRC2_RGB`, `?GL_SRC0_ALPHA`, `?GL_SRC1_ALPHA`, or `?GL_SRC2_ALPHA`.

texGend(Coord, Pname, Param)

Equivalent to `texGeniv/3`.

texGendv(Coord, Pname, Params)

Equivalent to `texGeniv/3`.

texGenf(Coord, Pname, Param)

Equivalent to `texGeniv/3`.

texGenfv(Coord, Pname, Params)

Equivalent to `texGeniv/3`.

texGeni(Coord, Pname, Param)

Equivalent to `texGeniv/3`.

texGeniv(Coord, Pname, Params)

`gl:texGen()` selects a texture-coordinate generation function or supplies coefficients for one of the functions. `Coord` names one of the (`s`, `t`, `r`, `q`) texture coordinates; it must be one of the symbols `?GL_S`, `?GL_T`, `?GL_R`, or `?GL_Q`. `Pname` must be one of three symbolic constants: `?GL_TEXTURE_GEN_MODE`, `?GL_OBJECT_PLANE`, or `?GL_EYE_PLANE`. If `Pname` is `?GL_TEXTURE_GEN_MODE`, then `Params` chooses a mode, one of `?GL_OBJECT_LINEAR`, `?GL_EYE_LINEAR`, `?GL_SPHERE_MAP`, `?GL_NORMAL_MAP`, or `?GL_REFLECTION_MAP`. If `Pname` is either `?GL_OBJECT_PLANE` or `?GL_EYE_PLANE`, `Params` contains coefficients for the corresponding texture generation function.

texImage1D(Target, Level, InternalFormat, Width, Border, Format, Type, Pixels)

Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled. To enable and disable one-dimensional texturing, call `gl:enable/1` and `gl:disable/1` with argument `?GL_TEXTURE_1D`.

texImage2D(Target, Level, InternalFormat, Width, Height, Border, Format, Type, Pixels)

Texturing allows elements of an image array to be read by shaders.

texImage2DMultisample(Target, Samples, Internalformat, Width, Height, Fixedsamplelocations)

`gl:texImage2DMultisample/6` establishes the data storage, format, dimensions and number of samples of a multisample texture's image.

texImage3D(Target, Level, InternalFormat, Width, Height, Depth, Border, Format, Type, Pixels)

Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled. To enable and disable three-dimensional texturing, call `gl:enable/1` and `gl:disable/1` with argument `?GL_TEXTURE_3D`.

texImage3DMultisample(Target, Samples, Internalformat, Width, Height, Depth, Fixedsamplelocations)

`gl:texImage3DMultisample/7` establishes the data storage, format, dimensions and number of samples of a multisample texture's image.

texParameterf(Target, Pname, Param)

Equivalent to `texParameteriv/3`.

texParameterfv(Target, Pname, Params)

Equivalent to `texParameteriv/3`.

texParameterIiv(Target, Pname, Params)

Equivalent to `texParameteriv/3`.

texParameterIuiv(Target, Pname, Params)

Equivalent to `texParameteriv/3`.

texParameteri(Target, Pname, Param)

Equivalent to `texParameteriv/3`.

texParameteriv(Target, Pname, Params)

`gl:texParameter()` and `gl:textureParameter()` assign the value or values in `Params` to the texture parameter specified as `Pname`. For `gl:texParameter()`, `Target` defines the target texture, either `?GL_TEXTURE_1D`, `?GL_TEXTURE_1D_ARRAY`, `?GL_TEXTURE_2D`, `?GL_TEXTURE_2D_ARRAY`, `?GL_TEXTURE_2D_MULTISAMPLE`, `?GL_TEXTURE_2D_MULTISAMPLE_ARRAY`, `?GL_TEXTURE_3D`, `?GL_TEXTURE_CUBE_MAP`, `?GL_TEXTURE_CUBE_MAP_ARRAY`, or `?GL_TEXTURE_RECTANGLE`. The following symbols are accepted in `Pname`

texStorage1D(Target, Levels, Internalformat, Width)

`gl:texStorage1D/4` and `gl:textureStorage1D()` specify the storage requirements for all levels of a one-dimensional texture simultaneously. Once a texture is specified with this command, the format and dimensions of all levels become immutable unless it is a proxy texture. The contents of the image may still be modified, however, its storage requirements may not change. Such a texture is referred to as an `immutable-format` texture.

texStorage2D(Target, Levels, Internalformat, Width, Height)

`gl:texStorage2D/5` and `gl:textureStorage2D()` specify the storage requirements for all levels of a two-dimensional texture or one-dimensional texture array simultaneously. Once a texture is specified with this command, the format and dimensions of all levels become immutable unless it is a proxy texture. The contents of the image may still be modified, however, its storage requirements may not change. Such a texture is referred to as an `immutable-format` texture.

texStorage2DMultisample(Target, Samples, Internalformat, Width, Height, Fixedsamplelocations)

`gl:texStorage2DMultisample/6` and `gl:textureStorage2DMultisample()` specify the storage requirements for a two-dimensional multisample texture. Once a texture is specified with this command, its format and dimensions become immutable unless it is a proxy texture. The contents of the image may still be modified, however, its storage requirements may not change. Such a texture is referred to as an `immutable-format` texture.

texStorage3D(Target, Levels, Internalformat, Width, Height, Depth)

`gl:texStorage3D/6` and `gl:textureStorage3D()` specify the storage requirements for all levels of a three-dimensional, two-dimensional array or cube-map array texture simultaneously. Once a texture is specified with this command, the format and dimensions of all levels become immutable unless it is a proxy texture. The contents of the image may still be modified, however, its storage requirements may not change. Such a texture is referred to as an `immutable-format` texture.

texStorage3DMultisample(Target, Samples, Internalformat, Width, Height, Depth, Fixedsamplelocations)

`gl:texStorage3DMultisample/7` and `gl:textureStorage3DMultisample()` specify the storage requirements for a two-dimensional multisample array texture. Once a texture is specified with this command, its format and dimensions become immutable unless it is a proxy texture. The contents of the image may still be modified, however, its storage requirements may not change. Such a texture is referred to as an `immutable-format` texture.

texSubImage1D(Target, Level, Xoffset, Width, Format, Type, Pixels)

Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled. To enable or disable one-dimensional texturing, call `gl:enable/1` and `gl:disable/1` with argument `?GL_TEXTURE_1D`.

texSubImage2D(Target, Level, Xoffset, Yoffset, Width, Height, Format, Type, Pixels)

Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled.

texSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth, Format, Type, Pixels)

Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled.

textureBarrier()

The values of rendered fragments are undefined when a shader stage fetches texels and the same texels are written via fragment shader outputs, even if the reads and writes are not in the same drawing command. To safely read the result of a written texel via a texel fetch in a subsequent drawing command, call `gl:textureBarrier/0` between the two drawing commands to guarantee that writes have completed and caches have been invalidated before subsequent drawing commands are executed.

textureBuffer(Texture, Internalformat, Buffer)

`gl:texBuffer/3` and `gl:textureBuffer/3` attaches the data store of a specified buffer object to a specified texture object, and specify the storage format for the texture image found in the buffer object. The texture object must be a buffer texture.

textureBufferRange(Texture, Internalformat, Buffer, Offset, Size)

`gl:texBufferRange/5` and `gl:textureBufferRange/5` attach a range of the data store of a specified buffer object to a specified texture object, and specify the storage format for the texture image found in the buffer object. The texture object must be a buffer texture.

textureView(Texture, Target, Origtexture, Internalformat, Minlevel, Numlevels, Minlayer, Numlayers)

`gl:textureView/8` initializes a texture object as an alias, or view of another texture object, sharing some or all of the parent texture's data store with the initialized texture. `Texture` specifies a name previously reserved by a successful call to `gl:genTextures/1` but that has not yet been bound or given a target. `Target` specifies the target for the newly initialized texture and must be compatible with the target of the parent texture, given in `Origtexture` as specified in the following table

transformFeedbackBufferBase(Xfb, Index, Buffer)

`gl:transformFeedbackBufferBase/3` binds the buffer object `Buffer` to the binding point at index `Index` of the transform feedback object `Xfb`.

transformFeedbackBufferRange(Xfb, Index, Buffer, Offset, Size)

`gl:transformFeedbackBufferRange/5` binds a range of the buffer object `Buffer` represented by `Offset` and `Size` to the binding point at index `Index` of the transform feedback object `Xfb`.

transformFeedbackVaryings(Program, Varyings, BufferMode)

The names of the vertex or geometry shader outputs to be recorded in transform feedback mode are specified using `gl:transformFeedbackVaryings/3`. When a geometry shader is active, transform feedback records the values of selected geometry shader output variables from the emitted vertices. Otherwise, the values of the selected vertex shader outputs are recorded.

translated(X, Y, Z)

Equivalent to `translatef/3`.

translatef(X, Y, Z)

`gl:translate()` produces a translation by (x y z). The current matrix (see `gl:matrixMode/1`) is multiplied by this translation matrix, with the product replacing the current matrix, as if `gl:multMatrix()` were called with the following matrix for its argument

uniform1d(Location, X)

Equivalent to `uniformMatrix4x3fv/3`.

uniform1dv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform1f(Location, V0)

Equivalent to `uniformMatrix4x3fv/3`.

uniform1fv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform1i(Location, V0)

Equivalent to `uniformMatrix4x3fv/3`.

uniform1iv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform1ui(Location, V0)

Equivalent to `uniformMatrix4x3fv/3`.

uniform1uiv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform2d(Location, X, Y)

Equivalent to `uniformMatrix4x3fv/3`.

uniform2dv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform2f(Location, V0, V1)

Equivalent to `uniformMatrix4x3fv/3`.

uniform2fv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform2i(Location, V0, V1)

Equivalent to `uniformMatrix4x3fv/3`.

uniform2iv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform2ui(Location, V0, V1)

Equivalent to `uniformMatrix4x3fv/3`.

uniform2uiv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform3d(Location, X, Y, Z)

Equivalent to `uniformMatrix4x3fv/3`.

uniform3dv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform3f(Location, V0, V1, V2)

Equivalent to `uniformMatrix4x3fv/3`.

uniform3fv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform3i(Location, V0, V1, V2)

Equivalent to `uniformMatrix4x3fv/3`.

uniform3iv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform3ui(Location, V0, V1, V2)

Equivalent to `uniformMatrix4x3fv/3`.

uniform3uiv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform4d(Location, X, Y, Z, W)

Equivalent to `uniformMatrix4x3fv/3`.

uniform4dv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform4f(Location, V0, V1, V2, V3)

Equivalent to `uniformMatrix4x3fv/3`.

uniform4fv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform4i(Location, V0, V1, V2, V3)

Equivalent to `uniformMatrix4x3fv/3`.

uniform4iv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniform4ui(Location, V0, V1, V2, V3)

Equivalent to `uniformMatrix4x3fv/3`.

uniform4uiv(Location, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformBlockBinding(Program, UniformBlockIndex, UniformBlockBinding)

Binding points for active uniform blocks are assigned using `gl:uniformBlockBinding/3`. Each of a program's active uniform blocks has a corresponding uniform buffer binding point. `Program` is the name of a program object for which the command `gl:linkProgram/1` has been issued in the past.

uniformMatrix2dv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix2fv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix2x3dv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix2x3fv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix2x4dv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix2x4fv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix3dv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix3fv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix3x2dv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix3x2fv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix3x4dv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix3x4fv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix4dv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix4fv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix4x2dv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix4x2fv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix4x3dv(Location, Transpose, Value)

Equivalent to `uniformMatrix4x3fv/3`.

uniformMatrix4x3fv(Location, Transpose, Value)

`gl:uniform()` modifies the value of a uniform variable or a uniform variable array. The location of the uniform variable to be modified is specified by `Location`, which should be a value returned by `gl:getUniformLocation/2`. `gl:uniform()` operates on the program object that was made part of current state by calling `gl:useProgram/1`.

uniformSubroutinesuiv(Shadertype, Indices)

`gl:uniformSubroutines()` loads all active subroutine uniforms for shader stage `Shadertype` of the current program with subroutine indices from `Indices`, storing `Indices[i]` into the uniform at location `I`. `Count` must be equal to the value of `?GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS` for the program currently in use at shader stage `Shadertype`. Furthermore, all values in `Indices` must be less than the value of `?GL_ACTIVE_SUBROUTINES` for the shader stage.

useProgram(Program)

`gl:useProgram/1` installs the program object specified by `Program` as part of current rendering state. One or more executables are created in a program object by successfully attaching shader objects to it with `gl:attachShader/2`, successfully compiling the shader objects with `gl:compileShader/1`, and successfully linking the program object with `gl:linkProgram/1`.

useProgramStages(Pipeline, Stages, Program)

`gl:useProgramStages/3` binds executables from a program object associated with a specified set of shader stages to the program pipeline object given by `Pipeline`. `Pipeline` specifies the program pipeline object to which to bind the executables. `Stages` contains a logical combination of bits indicating the shader stages to use within `Program` with the program pipeline object `Pipeline`. `Stages` must be a logical combination of `?GL_VERTEX_SHADER_BIT`, `?GL_TESS_CONTROL_SHADER_BIT`, `?GL_TESS_EVALUATION_SHADER_BIT`, `?GL_GEOMETRY_SHADER_BIT`, `?GL_FRAGMENT_SHADER_BIT` and `?GL_COMPUTE_SHADER_BIT`. Additionally, the special value `?GL_ALL_SHADER_BITS` may be specified to indicate that all executables contained in `Program` should be installed in `Pipeline`.

validateProgram(Program)

`gl:validateProgram/1` checks to see whether the executables contained in `Program` can execute given the current OpenGL state. The information generated by the validation process will be stored in `Program`'s information log. The validation information may consist of an empty string, or it may be a string containing information about how the current program object interacts with the rest of current OpenGL state. This provides a way for OpenGL implementers to convey more information about why the current program is inefficient, suboptimal, failing to execute, and so on.

validateProgramPipeline(Pipeline)

`gl:validateProgramPipeline/1` instructs the implementation to validate the shader executables contained in `Pipeline` against the current GL state. The implementation may use this as an opportunity to perform any internal shader modifications that may be required to ensure correct operation of the installed shaders given the current GL state.

vertex2d(X, Y)

Equivalent to `vertex4sv/1`.

vertex2dv/1

Equivalent to `vertex4sv/1`.

vertex2f(X, Y)

Equivalent to `vertex4sv/1`.

vertex2fv/1

Equivalent to `vertex4sv/1`.

vertex2i(X, Y)

Equivalent to `vertex4sv/1`.

vertex2iv/1

Equivalent to `vertex4sv/1`.

vertex2s(X, Y)

Equivalent to `vertex4sv/1`.

vertex2sv/1

Equivalent to `vertex4sv/1`.

vertex3d(X, Y, Z)

Equivalent to `vertex4sv/1`.

vertex3dv/1

Equivalent to `vertex4sv/1`.

vertex3f(X, Y, Z)

Equivalent to `vertex4sv/1`.

vertex3fv/1

Equivalent to `vertex4sv/1`.

vertex3i(X, Y, Z)

Equivalent to `vertex4sv/1`.

vertex3iv/1

Equivalent to `vertex4sv/1`.

vertex3s(X, Y, Z)

Equivalent to `vertex4sv/1`.

vertex3sv/1

Equivalent to `vertex4sv/1`.

vertex4d(X, Y, Z, W)

Equivalent to `vertex4sv/1`.

vertex4dv/1

Equivalent to `vertex4sv/1`.

vertex4f(X, Y, Z, W)

Equivalent to `vertex4sv/1`.

vertex4fv/1

Equivalent to `vertex4sv/1`.

vertex4i(X, Y, Z, W)

Equivalent to `vertex4sv/1`.

vertex4iv/1

Equivalent to `vertex4sv/1`.

vertex4s(X, Y, Z, W)

Equivalent to `vertex4sv/1`.

vertex4sv/1

`gl:vertex()` commands are used within `gl:'begin'/1`/`gl:'end'/0` pairs to specify point, line, and polygon vertices. The current color, normal, texture coordinates, and fog coordinate are associated with the vertex when `gl:vertex()` is called.

vertexArrayAttribBinding(Vaobj, Attribindex, Bindingindex)

Equivalent to `vertexAttribBinding/2`.

vertexArrayAttribFormat(Vaobj, Attribindex, Size, Type, Normalized, Relativeoffset)

Equivalent to `vertexAttribLPointer/5`.

vertexArrayAttribIFormat(Vaobj, Attribindex, Size, Type, Relativeoffset)

Equivalent to `vertexAttribLPointer/5`.

vertexArrayAttribLFormat(Vaobj, Attribindex, Size, Type, Relativeoffset)

Equivalent to `vertexAttribLPointer/5`.

vertexArrayBindingDivisor(Vaobj, Bindingindex, Divisor)

Equivalent to `vertexBindingDivisor/2`.

vertexArrayElementBuffer(Vaobj, Buffer)

`gl:vertexArrayElementBuffer/2` binds a buffer object with id `Buffer` to the element array buffer bind point of a vertex array object with id `Vaobj`. If `Buffer` is zero, any existing element array buffer binding to `Vaobj` is removed.

vertexArrayVertexBuffer(Vaobj, Bindingindex, Buffer, Offset, Stride)

`gl:bindVertexBuffer/4` and `gl:vertexArrayVertexBuffer/5` bind the buffer named `Buffer` to the vertex buffer binding point whose index is given by `Bindingindex`. `gl:bindVertexBuffer/4` modifies the binding of the currently bound vertex array object, whereas `gl:vertexArrayVertexBuffer/5` allows the caller to specify ID of the vertex array object with an argument named `Vaobj`, for which the binding should be modified. `Offset` and `Stride` specify the offset of the first element within the buffer and the distance between elements within the buffer, respectively, and are both measured in basic machine units. `Bindingindex` must be less than the value of `?GL_MAX_VERTEX_ATTRIB_BINDINGS`. `Offset` and `Stride` must be greater than or equal to zero. If `Buffer` is zero, then any buffer currently bound to the specified binding point is unbound.

vertexArrayVertexBuffers(Vaobj, First, Buffers, Offsets, Strides)

`gl:bindVertexBuffers/4` and `gl:vertexArrayVertexBuffers/5` bind storage from an array of existing buffer objects to a specified number of consecutive vertex buffer binding points units in a vertex array object. For `gl:bindVertexBuffers/4`, the vertex array object is the currently bound vertex array object. For `gl:vertexArrayVertexBuffers/5`, `Vaobj` is the name of the vertex array object.

vertexAttrib1d(Index, X)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib1dv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib1f(Index, X)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib1fv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib1s(Index, X)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib1sv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib2d(Index, X, Y)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib2dv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib2f(Index, X, Y)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib2fv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib2s(Index, X, Y)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib2sv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib3d(Index, X, Y, Z)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib3dv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib3f(Index, X, Y, Z)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib3fv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib3s(Index, X, Y, Z)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib3sv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4bv(Index, V)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4d(Index, X, Y, Z, W)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4dv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4f(Index, X, Y, Z, W)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4fv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4iv(Index, V)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4Nbv(Index, V)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4Niv(Index, V)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4Nsv(Index, V)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4Nub(Index, X, Y, Z, W)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4Nubv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4Nuiv(Index, V)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4Nusv(Index, V)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4s(Index, X, Y, Z, W)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4sv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4ubv(Index, V)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4uiv(Index, V)

Equivalent to `vertexAttribL4dv/2`.

vertexAttrib4usv(Index, V)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribBinding(Attribindex, Bindingindex)

`gl:vertexAttribBinding/2` and `gl:vertexArrayAttribBinding/3` establishes an association between the generic vertex attribute of a vertex array object whose index is given by `Attribindex`, and a vertex buffer binding whose index is given by `Bindingindex`. For `gl:vertexAttribBinding/2`, the vertex array object affected is that currently bound. For `gl:vertexArrayAttribBinding/3`, `Vaobj` is the name of the vertex array object.

vertexAttribDivisor(Index, Divisor)

`gl:vertexAttribDivisor/2` modifies the rate at which generic vertex attributes advance when rendering multiple instances of primitives in a single draw call. If `Divisor` is zero, the attribute at slot `Index` advances once per vertex. If `Divisor` is non-zero, the attribute advances once per `Divisor` instances of the set(s) of vertices being rendered. An attribute is referred to as instanced if its `?GL_VERTEX_ATTRIB_ARRAY_DIVISOR` value is non-zero.

vertexAttribFormat(Attribindex, Size, Type, Normalized, Relativeoffset)

Equivalent to `vertexAttribLPointer/5`.

vertexAttribI1i(Index, X)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI1iv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI1ui(Index, X)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI1uiv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI2i(Index, X, Y)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI2iv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI2ui(Index, X, Y)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI2uiv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI3i(Index, X, Y, Z)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI3iv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI3ui(Index, X, Y, Z)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI3uiv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI4bv(Index, V)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI4i(Index, X, Y, Z, W)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI4iv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI4sv(Index, V)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI4ubv(Index, V)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI4ui(Index, X, Y, Z, W)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI4uiv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttribI4usv(Index, V)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribIFormat(Attribindex, Size, Type, Relativeoffset)

Equivalent to `vertexAttribLPointer/5`.

vertexAttribIPointer(Index, Size, Type, Stride, Pointer)

Equivalent to `vertexAttribLPointer/5`.

vertexAttribL1d(Index, X)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribL1dv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttribL2d(Index, X, Y)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribL2dv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttribL3d(Index, X, Y, Z)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribL3dv/2

Equivalent to `vertexAttribL4dv/2`.

vertexAttribL4d(Index, X, Y, Z, W)

Equivalent to `vertexAttribL4dv/2`.

vertexAttribL4dv/2

The `gl:vertexAttrib()` family of entry points allows an application to pass generic vertex attributes in numbered locations.

vertexAttribLFormat(Attribindex, Size, Type, Relativeoffset)

Equivalent to `vertexAttribLPointer/5`.

vertexAttribLPointer(Index, Size, Type, Stride, Pointer)

`gl:vertexAttribFormat/5`, `gl:vertexAttribIFormat/4` and `gl:vertexAttribLFormat/4`, as well as `gl:vertexArrayAttribFormat/6`, `gl:vertexArrayAttribIFormat/5` and `gl:vertexArrayAttribLFormat/5` specify the organization of data in vertex arrays. The first three calls operate on the bound vertex array object, whereas the last three ones modify the state of a vertex array object with ID `Vaobj`. `Attribindex` specifies the index of the generic vertex attribute array whose data layout is being described, and must be less than the value of `?GL_MAX_VERTEX_ATTRIBS`.

vertexAttribPointer(Index, Size, Type, Normalized, Stride, Pointer)

`gl:vertexAttribPointer/6`, `gl:vertexAttribIPointer/5` and `gl:vertexAttribLPointer/5` specify the location and data format of the array of generic vertex attributes at index `Index` to use when rendering. `Size` specifies the number of components per attribute and must be 1, 2, 3, 4, or `?GL_BGRA`. `Type` specifies the data type of each component, and `Stride` specifies the byte stride from one attribute to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays.

vertexBindingDivisor(Bindingindex, Divisor)

`gl:vertexBindingDivisor/2` and `gl:vertexArrayBindingDivisor/3` modify the rate at which generic vertex attributes advance when rendering multiple instances of primitives in a single draw command. If `Divisor` is zero, the attributes using the buffer bound to `Bindingindex` advance once per vertex. If `Divisor` is non-zero, the attributes advance once per `Divisor` instances of the set(s) of vertices being rendered. An attribute is referred to as `instanced` if the corresponding `Divisor` value is non-zero.

vertexPointer(Size, Type, Stride, Ptr)

`gl:vertexPointer/4` specifies the location and data format of an array of vertex coordinates to use when rendering. `Size` specifies the number of coordinates per vertex, and must be 2, 3, or 4. `Type` specifies the data type of each coordinate, and `Stride` specifies the byte stride from one vertex to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays. (Single-array storage may be more efficient on some implementations; see `gl:interleavedArrays/3`.)

viewport(X, Y, Width, Height)

`gl:viewport/4` specifies the affine transformation of x and y from normalized device coordinates to window coordinates. Let (x nd y nd) be normalized device coordinates. Then the window coordinates (x w y w) are computed as follows

viewportArrayv(First, V)

`gl:viewportArrayv/2` specifies the parameters for multiple viewports simulataneously. `First` specifies the index of the first viewport to modify and `Count` specifies the number of viewports to modify. `First` must be less than the value of `?GL_MAX_VIEWPORTS`, and `First` + `Count` must be less than or equal to the value of `?GL_MAX_VIEWPORTS`. Viewports whose indices lie outside the range [`First`, `First` + `Count`) are not modified. `V` contains the address of an array of floating point values specifying the left ( x), bottom ( y), width ( w), and height ( h) of each viewport, in that order. x and y give the location of the viewport's lower left corner, and w and h give the width and height of the viewport, respectively. The viewport specifies the affine transformation of x and y from normalized device coordinates to window coordinates. Let (x nd y nd) be normalized device coordinates. Then the window coordinates (x w y w) are computed as follows

viewportIndexedf(Index, X, Y, W, H)

Equivalent to `viewportIndexedfv/2`.

viewportIndexedfv(Index, V)

`gl:viewportIndexedf/5` and `gl:viewportIndexedfv/2` specify the parameters for a single viewport. `Index` specifies the index of the viewport to modify. `Index` must be less than the value of `?GL_MAX_VIEWPORTS`. For `gl:viewportIndexedf/5`, `X`, `Y`, `W`, and `H` specify the left, bottom, width and height of the viewport in pixels, respectively. For `gl:viewportIndexedfv/2`, `V` contains the address of an array of floating point values specifying the left ( x), bottom ( y), width ( w), and height ( h) of each viewport, in that order. x and y give the location of the viewport's lower left corner, and w and h give the width and height of the viewport, respectively. The viewport specifies the affine transformation of x and y from normalized device coordinates to window coordinates. Let (x nd y nd) be normalized device coordinates. Then the window coordinates (x w y w) are computed as follows

waitSync(Sync, Flags, Timeout)

`gl:waitSync/3` causes the GL server to block and wait until `Sync` becomes signaled. `Sync` is the name of an existing sync object upon which to wait. `Flags` and `Timeout` are currently not used and must be set to zero and the special value `?GL_TIMEOUT_IGNORED`, respectively

windowPos2d(X, Y)

Equivalent to `windowPos3sv/1`.

windowPos2dv/1

Equivalent to `windowPos3sv/1`.

windowPos2f(X, Y)

Equivalent to `windowPos3sv/1`.

windowPos2fv/1

Equivalent to `windowPos3sv/1`.

windowPos2i(X, Y)

Equivalent to `windowPos3sv/1`.

windowPos2iv/1

Equivalent to `windowPos3sv/1`.

windowPos2s(X, Y)

Equivalent to `windowPos3sv/1`.

windowPos2sv/1

Equivalent to `windowPos3sv/1`.

windowPos3d(X, Y, Z)

Equivalent to `windowPos3sv/1`.

windowPos3dv/1

Equivalent to `windowPos3sv/1`.

windowPos3f(X, Y, Z)

Equivalent to `windowPos3sv/1`.

windowPos3fv/1

Equivalent to `windowPos3sv/1`.

windowPos3i(X, Y, Z)

Equivalent to `windowPos3sv/1`.

windowPos3iv/1

Equivalent to `windowPos3sv/1`.

windowPos3s(X, Y, Z)

Equivalent to `windowPos3sv/1`.

windowPos3sv/1

The GL maintains a 3D position in window coordinates. This position, called the raster position, is used to position pixel and bitmap write operations. It is maintained with subpixel accuracy. See `gl:bitmap/7`, `gl:drawPixels/5`, and `gl:copyPixels/5`.

## Types

# clamp()

(not exported)

    -type clamp() :: float().

# enum()

(not exported)

    -type enum() :: non_neg_integer().

# f()

(not exported)

    -type f() :: float().

# i()

(not exported)

    -type i() :: integer().

# m12()

(not exported)

    -type m12() :: {f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f()}.

# m16()

(not exported)

    -type m16() :: {f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f()}.

# matrix()

(not exported)

    -type matrix() :: m12() | m16().

# mem()

(not exported)

    -type mem() :: binary() | tuple().

# offset()

(not exported)

    -type offset() :: non_neg_integer().

## Functions

# accum(Op, Value)

    -spec accum(Op :: enum(), Value :: f()) -> ok.

The accumulation buffer is an extended-range color buffer. Images are not rendered into it. Rather, images rendered into one of the color buffers are added to the contents of the accumulation buffer after rendering. Effects such as antialiasing (of points, lines, and polygons), motion blur, and depth of field can be created by accumulating images generated with different transformation matrices.

External documentation.

# activeShaderProgram(Pipeline, Program)

    -spec activeShaderProgram(Pipeline :: i(), Program :: i()) -> ok.

`gl:activeShaderProgram/2` sets the linked program named by `Program` to be the active program for the program pipeline object `Pipeline`. The active program in the active program pipeline object is the target of calls to `gl:uniform()` when no program has been made current through a call to `gl:useProgram/1`.

External documentation.

# activeTexture(Texture)

    -spec activeTexture(Texture :: enum()) -> ok.

`gl:activeTexture/1` selects which texture unit subsequent texture state calls will affect. The number of texture units an implementation supports is implementation dependent, but must be at least 80.

External documentation.

# alphaFunc(Func, Ref)

    -spec alphaFunc(Func :: enum(), Ref :: clamp()) -> ok.

The alpha test discards fragments depending on the outcome of a comparison between an incoming fragment's alpha value and a constant reference value. `gl:alphaFunc/2` specifies the reference value and the comparison function. The comparison is performed only if alpha testing is enabled. By default, it is not enabled. (See `gl:enable/1` and `gl:disable/1` of `?GL_ALPHA_TEST`.)

External documentation.

# areTexturesResident(Textures)

    -spec areTexturesResident(Textures :: [i()]) -> {0 | 1, Residences :: [0 | 1]}.

GL establishes a ``working set'' of textures that are resident in texture memory. These textures can be bound to a texture target much more efficiently than textures that are not resident.

External documentation.

# arrayElement(I)

    -spec arrayElement(I :: i()) -> ok.

`gl:arrayElement/1` commands are used within `gl:'begin'/1`/`gl:'end'/0` pairs to specify vertex and attribute data for point, line, and polygon primitives. If `?GL_VERTEX_ARRAY` is enabled when `gl:arrayElement/1` is called, a single vertex is drawn, using vertex and attribute data taken from location `I` of the enabled arrays. If `?GL_VERTEX_ARRAY` is not enabled, no drawing occurs but the attributes corresponding to the enabled arrays are modified.

External documentation.

# attachShader(Program, Shader)

    -spec attachShader(Program :: i(), Shader :: i()) -> ok.

In order to create a complete shader program, there must be a way to specify the list of things that will be linked together. Program objects provide this mechanism. Shaders that are to be linked together in a program object must first be attached to that program object. `gl:attachShader/2` attaches the shader object specified by `Shader` to the program object specified by `Program`. This indicates that `Shader` will be included in link operations that will be performed on `Program`.

External documentation.

# 'begin'(Mode)

    -spec 'begin'(Mode :: enum()) -> ok.

Equivalent to `'\'end\''/0`.

# beginConditionalRender(Id, Mode)

    -spec beginConditionalRender(Id :: i(), Mode :: enum()) -> ok.

Equivalent to `endConditionalRender/0`.

# beginQuery(Target, Id)

    -spec beginQuery(Target :: enum(), Id :: i()) -> ok.

Equivalent to `endQuery/1`.

# beginQueryIndexed(Target, Index, Id)

    -spec beginQueryIndexed(Target :: enum(), Index :: i(), Id :: i()) -> ok.

Equivalent to `endQueryIndexed/2`.

# beginTransformFeedback(PrimitiveMode)

    -spec beginTransformFeedback(PrimitiveMode :: enum()) -> ok.

Equivalent to `endTransformFeedback/0`.

# bindAttribLocation(Program, Index, Name)

    -spec bindAttribLocation(Program :: i(), Index :: i(), Name :: string()) -> ok.

`gl:bindAttribLocation/3` is used to associate a user-defined attribute variable in the program object specified by `Program` with a generic vertex attribute index. The name of the user-defined attribute variable is passed as a null terminated string in `Name`. The generic vertex attribute index to be bound to this variable is specified by `Index`. When `Program` is made part of current state, values provided via the generic vertex attribute `Index` will modify the value of the user-defined attribute variable specified by `Name`.

External documentation.

# bindBuffer(Target, Buffer)

    -spec bindBuffer(Target :: enum(), Buffer :: i()) -> ok.

`gl:bindBuffer/2` binds a buffer object to the specified buffer binding point. Calling `gl:bindBuffer/2` with `Target` set to one of the accepted symbolic constants and `Buffer` set to the name of a buffer object binds that buffer object name to the target. If no buffer object with name `Buffer` exists, one is created with that name. When a buffer object is bound to a target, the previous binding for that target is automatically broken.

External documentation.

# bindBufferBase(Target, Index, Buffer)

    -spec bindBufferBase(Target :: enum(), Index :: i(), Buffer :: i()) -> ok.

`gl:bindBufferBase/3` binds the buffer object `Buffer` to the binding point at index `Index` of the array of targets specified by `Target`. Each `Target` represents an indexed array of buffer binding points, as well as a single general binding point that can be used by other buffer manipulation functions such as `gl:bindBuffer/2` or `glMapBuffer`. In addition to binding `Buffer` to the indexed buffer binding target, `gl:bindBufferBase/3` also binds `Buffer` to the generic buffer binding point specified by `Target`.

External documentation.

# bindBufferRange(Target, Index, Buffer, Offset, Size)

    -spec bindBufferRange(Target :: enum(), Index :: i(), Buffer :: i(), Offset :: i(), Size :: i()) -> ok.

`gl:bindBufferRange/5` binds a range the buffer object `Buffer` represented by `Offset` and `Size` to the binding point at index `Index` of the array of targets specified by `Target`. Each `Target` represents an indexed array of buffer binding points, as well as a single general binding point that can be used by other buffer manipulation functions such as `gl:bindBuffer/2` or `glMapBuffer`. In addition to binding a range of `Buffer` to the indexed buffer binding target, `gl:bindBufferRange/5` also binds the range to the generic buffer binding point specified by `Target`.

External documentation.

# bindBuffersBase(Target, First, Buffers)

    -spec bindBuffersBase(Target :: enum(), First :: i(), Buffers :: [i()]) -> ok.

`gl:bindBuffersBase/3` binds a set of `Count` buffer objects whose names are given in the array `Buffers` to the `Count` consecutive binding points starting from index `First` of the array of targets specified by `Target`. If `Buffers` is `?NULL` then `gl:bindBuffersBase/3` unbinds any buffers that are currently bound to the referenced binding points. Assuming no errors are generated, it is equivalent to the following pseudo-code, which calls `gl:bindBufferBase/3`, with the exception that the non-indexed `Target` is not changed by `gl:bindBuffersBase/3`:

External documentation.

# bindBuffersRange(Target, First, Buffers, Offsets, Sizes)

    -spec bindBuffersRange(Target :: enum(),
                           First :: i(),
                           Buffers :: [i()],
                           Offsets :: [i()],
                           Sizes :: [i()]) ->
                              ok.

`gl:bindBuffersRange/5` binds a set of `Count` ranges from buffer objects whose names are given in the array `Buffers` to the `Count` consecutive binding points starting from index `First` of the array of targets specified by `Target`. `Offsets` specifies the address of an array containing `Count` starting offsets within the buffers, and `Sizes` specifies the address of an array of `Count` sizes of the ranges. If `Buffers` is `?NULL` then `Offsets` and `Sizes` are ignored and `gl:bindBuffersRange/5` unbinds any buffers that are currently bound to the referenced binding points. Assuming no errors are generated, it is equivalent to the following pseudo-code, which calls `gl:bindBufferRange/5`, with the exception that the non-indexed `Target` is not changed by `gl:bindBuffersRange/5`:

External documentation.

# bindFragDataLocation(Program, Color, Name)

    -spec bindFragDataLocation(Program :: i(), Color :: i(), Name :: string()) -> ok.

`gl:bindFragDataLocation/3` explicitly specifies the binding of the user-defined varying out variable `Name` to fragment shader color number `ColorNumber` for program `Program`. If `Name` was bound previously, its assigned binding is replaced with `ColorNumber`. `Name` must be a null-terminated string. `ColorNumber` must be less than `?GL_MAX_DRAW_BUFFERS`.

External documentation.

# bindFragDataLocationIndexed(Program, ColorNumber, Index, Name)

    -spec bindFragDataLocationIndexed(Program :: i(), ColorNumber :: i(), Index :: i(), Name :: string()) ->
                                         ok.

`gl:bindFragDataLocationIndexed/4` specifies that the varying out variable `Name` in `Program` should be bound to fragment color `ColorNumber` when the program is next linked. `Index` may be zero or one to specify that the color be used as either the first or second color input to the blend equation, respectively.

External documentation.

# bindFramebuffer(Target, Framebuffer)

    -spec bindFramebuffer(Target :: enum(), Framebuffer :: i()) -> ok.

`gl:bindFramebuffer/2` binds the framebuffer object with name `Framebuffer` to the framebuffer target specified by `Target`. `Target` must be either `?GL_DRAW_FRAMEBUFFER`, `?GL_READ_FRAMEBUFFER` or `?GL_FRAMEBUFFER`. If a framebuffer object is bound to `?GL_DRAW_FRAMEBUFFER` or `?GL_READ_FRAMEBUFFER`, it becomes the target for rendering or readback operations, respectively, until it is deleted or another framebuffer is bound to the corresponding bind point. Calling `gl:bindFramebuffer/2` with `Target` set to `?GL_FRAMEBUFFER` binds `Framebuffer` to both the read and draw framebuffer targets. `Framebuffer` is the name of a framebuffer object previously returned from a call to `gl:genFramebuffers/1`, or zero to break the existing binding of a framebuffer object to `Target`.

External documentation.

# bindImageTexture(Unit, Texture, Level, Layered, Layer, Access, Format)

    -spec bindImageTexture(Unit, Texture, Level, Layered, Layer, Access, Format) -> ok
                              when
                                  Unit :: i(),
                                  Texture :: i(),
                                  Level :: i(),
                                  Layered :: 0 | 1,
                                  Layer :: i(),
                                  Access :: enum(),
                                  Format :: enum().

`gl:bindImageTexture/7` binds a single level of a texture to an image unit for the purpose of reading and writing it from shaders. `Unit` specifies the zero-based index of the image unit to which to bind the texture level. `Texture` specifies the name of an existing texture object to bind to the image unit. If `Texture` is zero, then any existing binding to the image unit is broken. `Level` specifies the level of the texture to bind to the image unit.

External documentation.

# bindImageTextures(First, Textures)

    -spec bindImageTextures(First :: i(), Textures :: [i()]) -> ok.

`gl:bindImageTextures/2` binds images from an array of existing texture objects to a specified number of consecutive image units. `Count` specifies the number of texture objects whose names are stored in the array `Textures`. That number of texture names are read from the array and bound to the `Count` consecutive texture units starting from `First`. If the name zero appears in the `Textures` array, any existing binding to the image unit is reset. Any non-zero entry in `Textures` must be the name of an existing texture object. When a non-zero entry in `Textures` is present, the image at level zero is bound, the binding is considered layered, with the first layer set to zero, and the image is bound for read-write access. The image unit format parameter is taken from the internal format of the image at level zero of the texture object. For cube map textures, the internal format of the positive X image of level zero is used. If `Textures` is `?NULL` then it is as if an appropriately sized array containing only zeros had been specified.

External documentation.

# bindProgramPipeline(Pipeline)

    -spec bindProgramPipeline(Pipeline :: i()) -> ok.

`gl:bindProgramPipeline/1` binds a program pipeline object to the current context. `Pipeline` must be a name previously returned from a call to `gl:genProgramPipelines/1`. If no program pipeline exists with name `Pipeline` then a new pipeline object is created with that name and initialized to the default state vector.

External documentation.

# bindRenderbuffer(Target, Renderbuffer)

    -spec bindRenderbuffer(Target :: enum(), Renderbuffer :: i()) -> ok.

`gl:bindRenderbuffer/2` binds the renderbuffer object with name `Renderbuffer` to the renderbuffer target specified by `Target`. `Target` must be `?GL_RENDERBUFFER`. `Renderbuffer` is the name of a renderbuffer object previously returned from a call to `gl:genRenderbuffers/1`, or zero to break the existing binding of a renderbuffer object to `Target`.

External documentation.

# bindSampler(Unit, Sampler)

    -spec bindSampler(Unit :: i(), Sampler :: i()) -> ok.

`gl:bindSampler/2` binds `Sampler` to the texture unit at index `Unit`. `Sampler` must be zero or the name of a sampler object previously returned from a call to `gl:genSamplers/1`. `Unit` must be less than the value of `?GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS`.

External documentation.

# bindSamplers(First, Samplers)

    -spec bindSamplers(First :: i(), Samplers :: [i()]) -> ok.

`gl:bindSamplers/2` binds samplers from an array of existing sampler objects to a specified number of consecutive sampler units. `Count` specifies the number of sampler objects whose names are stored in the array `Samplers`. That number of sampler names is read from the array and bound to the `Count` consecutive sampler units starting from `First`.

External documentation.

# bindTexture(Target, Texture)

    -spec bindTexture(Target :: enum(), Texture :: i()) -> ok.

`gl:bindTexture/2` lets you create or use a named texture. Calling `gl:bindTexture/2` with `Target` set to `?GL_TEXTURE_1D`, `?GL_TEXTURE_2D`, `?GL_TEXTURE_3D`, `?GL_TEXTURE_1D_ARRAY`, `?GL_TEXTURE_2D_ARRAY`, `?GL_TEXTURE_RECTANGLE`, `?GL_TEXTURE_CUBE_MAP`, `?GL_TEXTURE_CUBE_MAP_ARRAY`, `?GL_TEXTURE_BUFFER`, `?GL_TEXTURE_2D_MULTISAMPLE` or `?GL_TEXTURE_2D_MULTISAMPLE_ARRAY` and `Texture` set to the name of the new texture binds the texture name to the target. When a texture is bound to a target, the previous binding for that target is automatically broken.

External documentation.

# bindTextures(First, Textures)

    -spec bindTextures(First :: i(), Textures :: [i()]) -> ok.

`gl:bindTextures/2` binds an array of existing texture objects to a specified number of consecutive texture units. `Count` specifies the number of texture objects whose names are stored in the array `Textures`. That number of texture names are read from the array and bound to the `Count` consecutive texture units starting from `First`. The target, or type of texture is deduced from the texture object and each texture is bound to the corresponding target of the texture unit. If the name zero appears in the `Textures` array, any existing binding to any target of the texture unit is reset and the default texture for that target is bound in its place. Any non-zero entry in `Textures` must be the name of an existing texture object. If `Textures` is `?NULL` then it is as if an appropriately sized array containing only zeros had been specified.

External documentation.

# bindTextureUnit(Unit, Texture)

    -spec bindTextureUnit(Unit :: i(), Texture :: i()) -> ok.

`gl:bindTextureUnit/2` binds an existing texture object to the texture unit numbered `Unit`.

External documentation.

# bindTransformFeedback(Target, Id)

    -spec bindTransformFeedback(Target :: enum(), Id :: i()) -> ok.

`gl:bindTransformFeedback/2` binds the transform feedback object with name `Id` to the current GL state. `Id` must be a name previously returned from a call to `gl:genTransformFeedbacks/1`. If `Id` has not previously been bound, a new transform feedback object with name `Id` and initialized with the default transform state vector is created.

External documentation.

# bindVertexArray(Array)

    -spec bindVertexArray(Array :: i()) -> ok.

`gl:bindVertexArray/1` binds the vertex array object with name `Array`. `Array` is the name of a vertex array object previously returned from a call to `gl:genVertexArrays/1`, or zero to break the existing vertex array object binding.

External documentation.

# bindVertexBuffer(Bindingindex, Buffer, Offset, Stride)

    -spec bindVertexBuffer(Bindingindex :: i(), Buffer :: i(), Offset :: i(), Stride :: i()) -> ok.

Equivalent to `vertexArrayVertexBuffer/5`.

# bindVertexBuffers(First, Buffers, Offsets, Strides)

    -spec bindVertexBuffers(First :: i(), Buffers :: [i()], Offsets :: [i()], Strides :: [i()]) -> ok.

Equivalent to `vertexArrayVertexBuffers/5`.

# bitmap(Width, Height, Xorig, Yorig, Xmove, Ymove, Bitmap)

    -spec bitmap(Width, Height, Xorig, Yorig, Xmove, Ymove, Bitmap) -> ok
                    when
                        Width :: i(),
                        Height :: i(),
                        Xorig :: f(),
                        Yorig :: f(),
                        Xmove :: f(),
                        Ymove :: f(),
                        Bitmap :: offset() | mem().

A bitmap is a binary image. When drawn, the bitmap is positioned relative to the current raster position, and frame buffer pixels corresponding to 1's in the bitmap are written using the current raster color or index. Frame buffer pixels corresponding to 0's in the bitmap are not modified.

External documentation.

# blendColor(Red, Green, Blue, Alpha)

    -spec blendColor(Red :: clamp(), Green :: clamp(), Blue :: clamp(), Alpha :: clamp()) -> ok.

The `?GL_BLEND_COLOR` may be used to calculate the source and destination blending factors. The color components are clamped to the range [0 1] before being stored. See `gl:blendFunc/2` for a complete description of the blending operations. Initially the `?GL_BLEND_COLOR` is set to (0, 0, 0, 0).

External documentation.

# blendEquation(Mode)

    -spec blendEquation(Mode :: enum()) -> ok.

Equivalent to `blendEquationi/2`.

# blendEquationi(Buf, Mode)

    -spec blendEquationi(Buf :: i(), Mode :: enum()) -> ok.

The blend equations determine how a new pixel (the ''source'' color) is combined with a pixel already in the framebuffer (the ''destination'' color). This function sets both the RGB blend equation and the alpha blend equation to a single equation. `gl:blendEquationi/2` specifies the blend equation for a single draw buffer whereas `gl:blendEquation/1` sets the blend equation for all draw buffers.

External documentation.

# blendEquationSeparate(ModeRGB, ModeAlpha)

    -spec blendEquationSeparate(ModeRGB :: enum(), ModeAlpha :: enum()) -> ok.

Equivalent to `blendEquationSeparatei/3`.

# blendEquationSeparatei(Buf, ModeRGB, ModeAlpha)

    -spec blendEquationSeparatei(Buf :: i(), ModeRGB :: enum(), ModeAlpha :: enum()) -> ok.

The blend equations determines how a new pixel (the ''source'' color) is combined with a pixel already in the framebuffer (the ''destination'' color). These functions specify one blend equation for the RGB-color components and one blend equation for the alpha component. `gl:blendEquationSeparatei/3` specifies the blend equations for a single draw buffer whereas `gl:blendEquationSeparate/2` sets the blend equations for all draw buffers.

External documentation.

# blendFunc(Sfactor, Dfactor)

    -spec blendFunc(Sfactor :: enum(), Dfactor :: enum()) -> ok.

Equivalent to `blendFunci/3`.

# blendFunci(Buf, Src, Dst)

    -spec blendFunci(Buf :: i(), Src :: enum(), Dst :: enum()) -> ok.

Pixels can be drawn using a function that blends the incoming (source) RGBA values with the RGBA values that are already in the frame buffer (the destination values). Blending is initially disabled. Use `gl:enable/1` and `gl:disable/1` with argument `?GL_BLEND` to enable and disable blending.

External documentation.

# blendFuncSeparate(SfactorRGB, DfactorRGB, SfactorAlpha, DfactorAlpha)

    -spec blendFuncSeparate(SfactorRGB, DfactorRGB, SfactorAlpha, DfactorAlpha) -> ok
                               when
                                   SfactorRGB :: enum(),
                                   DfactorRGB :: enum(),
                                   SfactorAlpha :: enum(),
                                   DfactorAlpha :: enum().

Equivalent to `blendFuncSeparatei/5`.

# blendFuncSeparatei(Buf, SrcRGB, DstRGB, SrcAlpha, DstAlpha)

    -spec blendFuncSeparatei(Buf :: i(),
                             SrcRGB :: enum(),
                             DstRGB :: enum(),
                             SrcAlpha :: enum(),
                             DstAlpha :: enum()) ->
                                ok.

Pixels can be drawn using a function that blends the incoming (source) RGBA values with the RGBA values that are already in the frame buffer (the destination values). Blending is initially disabled. Use `gl:enable/1` and `gl:disable/1` with argument `?GL_BLEND` to enable and disable blending.

External documentation.

# blitFramebuffer(SrcX0, SrcY0, SrcX1, SrcY1, DstX0, DstY0, DstX1, DstY1, Mask, Filter)

    -spec blitFramebuffer(SrcX0, SrcY0, SrcX1, SrcY1, DstX0, DstY0, DstX1, DstY1, Mask, Filter) -> ok
                             when
                                 SrcX0 :: i(),
                                 SrcY0 :: i(),
                                 SrcX1 :: i(),
                                 SrcY1 :: i(),
                                 DstX0 :: i(),
                                 DstY0 :: i(),
                                 DstX1 :: i(),
                                 DstY1 :: i(),
                                 Mask :: i(),
                                 Filter :: enum().

`gl:blitFramebuffer/10` and `glBlitNamedFramebuffer` transfer a rectangle of pixel values from one region of a read framebuffer to another region of a draw framebuffer.

External documentation.

# bufferData(Target, Size, Data, Usage)

    -spec bufferData(Target :: enum(), Size :: i(), Data :: offset() | mem(), Usage :: enum()) -> ok.

`gl:bufferData/4` and `glNamedBufferData` create a new data store for a buffer object. In case of `gl:bufferData/4`, the buffer object currently bound to `Target` is used. For `glNamedBufferData`, a buffer object associated with ID specified by the caller in `Buffer` will be used instead.

External documentation.

# bufferStorage(Target, Size, Data, Flags)

    -spec bufferStorage(Target :: enum(), Size :: i(), Data :: offset() | mem(), Flags :: i()) -> ok.

`gl:bufferStorage/4` and `glNamedBufferStorage` create a new immutable data store. For `gl:bufferStorage/4`, the buffer object currently bound to `Target` will be initialized. For `glNamedBufferStorage`, `Buffer` is the name of the buffer object that will be configured. The size of the data store is specified by `Size`. If an initial data is available, its address may be supplied in `Data`. Otherwise, to create an uninitialized data store, `Data` should be `?NULL`.

External documentation.

# bufferSubData(Target, Offset, Size, Data)

    -spec bufferSubData(Target :: enum(), Offset :: i(), Size :: i(), Data :: offset() | mem()) -> ok.

`gl:bufferSubData/4` and `glNamedBufferSubData` redefine some or all of the data store for the specified buffer object. Data starting at byte offset `Offset` and extending for `Size` bytes is copied to the data store from the memory pointed to by `Data`. `Offset` and `Size` must define a range lying entirely within the buffer object's data store.

External documentation.

# callList(List)

    -spec callList(List :: i()) -> ok.

`gl:callList/1` causes the named display list to be executed. The commands saved in the display list are executed in order, just as if they were called without using a display list. If `List` has not been defined as a display list, `gl:callList/1` is ignored.

External documentation.

# callLists(Lists)

    -spec callLists(Lists :: [i()]) -> ok.

`gl:callLists/1` causes each display list in the list of names passed as `Lists` to be executed. As a result, the commands saved in each display list are executed in order, just as if they were called without using a display list. Names of display lists that have not been defined are ignored.

External documentation.

# checkFramebufferStatus(Target)

    -spec checkFramebufferStatus(Target :: enum()) -> enum().

`gl:checkFramebufferStatus/1` and `glCheckNamedFramebufferStatus` return the completeness status of a framebuffer object when treated as a read or draw framebuffer, depending on the value of `Target`.

External documentation.

# clampColor(Target, Clamp)

    -spec clampColor(Target :: enum(), Clamp :: enum()) -> ok.

`gl:clampColor/2` controls color clamping that is performed during `gl:readPixels/7`. `Target` must be `?GL_CLAMP_READ_COLOR`. If `Clamp` is `?GL_TRUE`, read color clamping is enabled; if `Clamp` is `?GL_FALSE`, read color clamping is disabled. If `Clamp` is `?GL_FIXED_ONLY`, read color clamping is enabled only if the selected read buffer has fixed point components and disabled otherwise.

External documentation.

# clear(Mask)

    -spec clear(Mask :: i()) -> ok.

`gl:clear/1` sets the bitplane area of the window to values previously selected by `gl:clearColor/4`, `gl:clearDepth/1`, and `gl:clearStencil/1`. Multiple color buffers can be cleared simultaneously by selecting more than one buffer at a time using `gl:drawBuffer/1`.

External documentation.

# clearAccum(Red, Green, Blue, Alpha)

    -spec clearAccum(Red :: f(), Green :: f(), Blue :: f(), Alpha :: f()) -> ok.

`gl:clearAccum/4` specifies the red, green, blue, and alpha values used by `gl:clear/1` to clear the accumulation buffer.

External documentation.

# clearBufferData(Target, Internalformat, Format, Type, Data)

    -spec clearBufferData(Target, Internalformat, Format, Type, Data) -> ok
                             when
                                 Target :: enum(),
                                 Internalformat :: enum(),
                                 Format :: enum(),
                                 Type :: enum(),
                                 Data :: offset() | mem().

Equivalent to `clearBufferuiv/3`.

# clearBufferfi(Buffer, Drawbuffer, Depth, Stencil)

    -spec clearBufferfi(Buffer :: enum(), Drawbuffer :: i(), Depth :: f(), Stencil :: i()) -> ok.

Equivalent to `clearBufferuiv/3`.

# clearBufferfv(Buffer, Drawbuffer, Value)

    -spec clearBufferfv(Buffer :: enum(), Drawbuffer :: i(), Value :: tuple()) -> ok.

Equivalent to `clearBufferuiv/3`.

# clearBufferiv(Buffer, Drawbuffer, Value)

    -spec clearBufferiv(Buffer :: enum(), Drawbuffer :: i(), Value :: tuple()) -> ok.

Equivalent to `clearBufferuiv/3`.

# clearBufferSubData(Target, Internalformat, Offset, Size, Format, Type, Data)

    -spec clearBufferSubData(Target, Internalformat, Offset, Size, Format, Type, Data) -> ok
                                when
                                    Target :: enum(),
                                    Internalformat :: enum(),
                                    Offset :: i(),
                                    Size :: i(),
                                    Format :: enum(),
                                    Type :: enum(),
                                    Data :: offset() | mem().

Equivalent to `clearBufferuiv/3`.

# clearBufferuiv(Buffer, Drawbuffer, Value)

    -spec clearBufferuiv(Buffer :: enum(), Drawbuffer :: i(), Value :: tuple()) -> ok.

These commands clear a specified buffer of a framebuffer to specified value(s). For `gl:clearBuffer*()`, the framebuffer is the currently bound draw framebuffer object. For `glClearNamedFramebuffer*`, `Framebuffer` is zero, indicating the default draw framebuffer, or the name of a framebuffer object.

External documentation.

# clearColor(Red, Green, Blue, Alpha)

    -spec clearColor(Red :: clamp(), Green :: clamp(), Blue :: clamp(), Alpha :: clamp()) -> ok.

`gl:clearColor/4` specifies the red, green, blue, and alpha values used by `gl:clear/1` to clear the color buffers. Values specified by `gl:clearColor/4` are clamped to the range [0 1].

External documentation.

# clearDepth(Depth)

    -spec clearDepth(Depth :: clamp()) -> ok.

Equivalent to `clearDepthf/1`.

# clearDepthf(D)

    -spec clearDepthf(D :: f()) -> ok.

`gl:clearDepth/1` specifies the depth value used by `gl:clear/1` to clear the depth buffer. Values specified by `gl:clearDepth/1` are clamped to the range [0 1].

External documentation.

# clearIndex(C)

    -spec clearIndex(C :: f()) -> ok.

`gl:clearIndex/1` specifies the index used by `gl:clear/1` to clear the color index buffers. `C` is not clamped. Rather, `C` is converted to a fixed-point value with unspecified precision to the right of the binary point. The integer part of this value is then masked with 2 m-1, where m is the number of bits in a color index stored in the frame buffer.

External documentation.

# clearStencil(S)

    -spec clearStencil(S :: i()) -> ok.

`gl:clearStencil/1` specifies the index used by `gl:clear/1` to clear the stencil buffer. `S` is masked with 2 m-1, where m is the number of bits in the stencil buffer.

External documentation.

# clearTexImage(Texture, Level, Format, Type, Data)

    -spec clearTexImage(Texture :: i(),
                        Level :: i(),
                        Format :: enum(),
                        Type :: enum(),
                        Data :: offset() | mem()) ->
                           ok.

`gl:clearTexImage/5` fills all an image contained in a texture with an application supplied value. `Texture` must be the name of an existing texture. Further, `Texture` may not be the name of a buffer texture, nor may its internal format be compressed.

External documentation.

# clearTexSubImage(Texture, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth, Format, Type, Data)

    -spec clearTexSubImage(Texture, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth, Format, Type,
                           Data) ->
                              ok
                              when
                                  Texture :: i(),
                                  Level :: i(),
                                  Xoffset :: i(),
                                  Yoffset :: i(),
                                  Zoffset :: i(),
                                  Width :: i(),
                                  Height :: i(),
                                  Depth :: i(),
                                  Format :: enum(),
                                  Type :: enum(),
                                  Data :: offset() | mem().

`gl:clearTexSubImage/11` fills all or part of an image contained in a texture with an application supplied value. `Texture` must be the name of an existing texture. Further, `Texture` may not be the name of a buffer texture, nor may its internal format be compressed.

External documentation.

# clientActiveTexture(Texture)

    -spec clientActiveTexture(Texture :: enum()) -> ok.

`gl:clientActiveTexture/1` selects the vertex array client state parameters to be modified by `gl:texCoordPointer/4`, and enabled or disabled with `gl:enableClientState/1` or `gl:disableClientState/1`, respectively, when called with a parameter of `?GL_TEXTURE_COORD_ARRAY`.

External documentation.

# clientWaitSync(Sync, Flags, Timeout)

    -spec clientWaitSync(Sync :: i(), Flags :: i(), Timeout :: i()) -> enum().

`gl:clientWaitSync/3` causes the client to block and wait for the sync object specified by `Sync` to become signaled. If `Sync` is signaled when `gl:clientWaitSync/3` is called, `gl:clientWaitSync/3` returns immediately, otherwise it will block and wait for up to `Timeout` nanoseconds for `Sync` to become signaled.

External documentation.

# clipControl(Origin, Depth)

    -spec clipControl(Origin :: enum(), Depth :: enum()) -> ok.

`gl:clipControl/2` controls the clipping volume behavior and the clip coordinate to window coordinate transformation behavior.

External documentation.

# clipPlane(Plane, Equation)

    -spec clipPlane(Plane :: enum(), Equation :: {f(), f(), f(), f()}) -> ok.

Geometry is always clipped against the boundaries of a six-plane frustum in `x`, `y`, and `z`. `gl:clipPlane/2` allows the specification of additional planes, not necessarily perpendicular to the `x`, `y`, or `z` axis, against which all geometry is clipped. To determine the maximum number of additional clipping planes, call `gl:getIntegerv/1` with argument `?GL_MAX_CLIP_PLANES`. All implementations support at least six such clipping planes. Because the resulting clipping region is the intersection of the defined half-spaces, it is always convex.

External documentation.

# color3b(Red, Green, Blue)

    -spec color3b(Red :: i(), Green :: i(), Blue :: i()) -> ok.

Equivalent to `color4usv/1`.

# color3bv/1

    -spec color3bv({Red :: i(), Green :: i(), Blue :: i()}) -> ok.

Equivalent to `color4usv/1`.

# color3d(Red, Green, Blue)

    -spec color3d(Red :: f(), Green :: f(), Blue :: f()) -> ok.

Equivalent to `color4usv/1`.

# color3dv/1

    -spec color3dv({Red :: f(), Green :: f(), Blue :: f()}) -> ok.

Equivalent to `color4usv/1`.

# color3f(Red, Green, Blue)

    -spec color3f(Red :: f(), Green :: f(), Blue :: f()) -> ok.

Equivalent to `color4usv/1`.

# color3fv/1

    -spec color3fv({Red :: f(), Green :: f(), Blue :: f()}) -> ok.

Equivalent to `color4usv/1`.

# color3i(Red, Green, Blue)

    -spec color3i(Red :: i(), Green :: i(), Blue :: i()) -> ok.

Equivalent to `color4usv/1`.

# color3iv/1

    -spec color3iv({Red :: i(), Green :: i(), Blue :: i()}) -> ok.

Equivalent to `color4usv/1`.

# color3s(Red, Green, Blue)

    -spec color3s(Red :: i(), Green :: i(), Blue :: i()) -> ok.

Equivalent to `color4usv/1`.

# color3sv/1

    -spec color3sv({Red :: i(), Green :: i(), Blue :: i()}) -> ok.

Equivalent to `color4usv/1`.

# color3ub(Red, Green, Blue)

    -spec color3ub(Red :: i(), Green :: i(), Blue :: i()) -> ok.

Equivalent to `color4usv/1`.

# color3ubv/1

    -spec color3ubv({Red :: i(), Green :: i(), Blue :: i()}) -> ok.

Equivalent to `color4usv/1`.

# color3ui(Red, Green, Blue)

    -spec color3ui(Red :: i(), Green :: i(), Blue :: i()) -> ok.

Equivalent to `color4usv/1`.

# color3uiv/1

    -spec color3uiv({Red :: i(), Green :: i(), Blue :: i()}) -> ok.

Equivalent to `color4usv/1`.

# color3us(Red, Green, Blue)

    -spec color3us(Red :: i(), Green :: i(), Blue :: i()) -> ok.

Equivalent to `color4usv/1`.

# color3usv/1

    -spec color3usv({Red :: i(), Green :: i(), Blue :: i()}) -> ok.

Equivalent to `color4usv/1`.

# color4b(Red, Green, Blue, Alpha)

    -spec color4b(Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()) -> ok.

Equivalent to `color4usv/1`.

# color4bv/1

    -spec color4bv({Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()}) -> ok.

Equivalent to `color4usv/1`.

# color4d(Red, Green, Blue, Alpha)

    -spec color4d(Red :: f(), Green :: f(), Blue :: f(), Alpha :: f()) -> ok.

Equivalent to `color4usv/1`.

# color4dv/1

    -spec color4dv({Red :: f(), Green :: f(), Blue :: f(), Alpha :: f()}) -> ok.

Equivalent to `color4usv/1`.

# color4f(Red, Green, Blue, Alpha)

    -spec color4f(Red :: f(), Green :: f(), Blue :: f(), Alpha :: f()) -> ok.

Equivalent to `color4usv/1`.

# color4fv/1

    -spec color4fv({Red :: f(), Green :: f(), Blue :: f(), Alpha :: f()}) -> ok.

Equivalent to `color4usv/1`.

# color4i(Red, Green, Blue, Alpha)

    -spec color4i(Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()) -> ok.

Equivalent to `color4usv/1`.

# color4iv/1

    -spec color4iv({Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()}) -> ok.

Equivalent to `color4usv/1`.

# color4s(Red, Green, Blue, Alpha)

    -spec color4s(Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()) -> ok.

Equivalent to `color4usv/1`.

# color4sv/1

    -spec color4sv({Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()}) -> ok.

Equivalent to `color4usv/1`.

# color4ub(Red, Green, Blue, Alpha)

    -spec color4ub(Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()) -> ok.

Equivalent to `color4usv/1`.

# color4ubv/1

    -spec color4ubv({Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()}) -> ok.

Equivalent to `color4usv/1`.

# color4ui(Red, Green, Blue, Alpha)

    -spec color4ui(Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()) -> ok.

Equivalent to `color4usv/1`.

# color4uiv/1

    -spec color4uiv({Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()}) -> ok.

Equivalent to `color4usv/1`.

# color4us(Red, Green, Blue, Alpha)

    -spec color4us(Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()) -> ok.

Equivalent to `color4usv/1`.

# color4usv/1

    -spec color4usv({Red :: i(), Green :: i(), Blue :: i(), Alpha :: i()}) -> ok.

The GL stores both a current single-valued color index and a current four-valued RGBA color. `gl:color()` sets a new four-valued RGBA color. `gl:color()` has two major variants: `gl:color3()` and `gl:color4()`. `gl:color3()` variants specify new red, green, and blue values explicitly and set the current alpha value to 1.0 (full intensity) implicitly. `gl:color4()` variants specify all four color components explicitly.

External documentation.

# colorMask(Red, Green, Blue, Alpha)

    -spec colorMask(Red :: 0 | 1, Green :: 0 | 1, Blue :: 0 | 1, Alpha :: 0 | 1) -> ok.

Equivalent to `colorMaski/5`.

# colorMaski(Index, R, G, B, A)

    -spec colorMaski(Index :: i(), R :: 0 | 1, G :: 0 | 1, B :: 0 | 1, A :: 0 | 1) -> ok.

`gl:colorMask/4` and `gl:colorMaski/5` specify whether the individual color components in the frame buffer can or cannot be written. `gl:colorMaski/5` sets the mask for a specific draw buffer, whereas `gl:colorMask/4` sets the mask for all draw buffers. If `Red` is `?GL_FALSE`, for example, no change is made to the red component of any pixel in any of the color buffers, regardless of the drawing operation attempted.

External documentation.

# colorMaterial(Face, Mode)

    -spec colorMaterial(Face :: enum(), Mode :: enum()) -> ok.

`gl:colorMaterial/2` specifies which material parameters track the current color. When `?GL_COLOR_MATERIAL` is enabled, the material parameter or parameters specified by `Mode`, of the material or materials specified by `Face`, track the current color at all times.

External documentation.

# colorPointer(Size, Type, Stride, Ptr)

    -spec colorPointer(Size :: i(), Type :: enum(), Stride :: i(), Ptr :: offset() | mem()) -> ok.

`gl:colorPointer/4` specifies the location and data format of an array of color components to use when rendering. `Size` specifies the number of components per color, and must be 3 or 4. `Type` specifies the data type of each color component, and `Stride` specifies the byte stride from one color to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays. (Single-array storage may be more efficient on some implementations; see `gl:interleavedArrays/3`.)

External documentation.

# colorSubTable(Target, Start, Count, Format, Type, Data)

    -spec colorSubTable(Target, Start, Count, Format, Type, Data) -> ok
                           when
                               Target :: enum(),
                               Start :: i(),
                               Count :: i(),
                               Format :: enum(),
                               Type :: enum(),
                               Data :: offset() | mem().

`gl:colorSubTable/6` is used to respecify a contiguous portion of a color table previously defined using `gl:colorTable/6`. The pixels referenced by `Data` replace the portion of the existing table from indices `Start` to start+count-1, inclusive. This region may not include any entries outside the range of the color table as it was originally specified. It is not an error to specify a subtexture with width of 0, but such a specification has no effect.

External documentation.

# colorTable(Target, Internalformat, Width, Format, Type, Table)

    -spec colorTable(Target, Internalformat, Width, Format, Type, Table) -> ok
                        when
                            Target :: enum(),
                            Internalformat :: enum(),
                            Width :: i(),
                            Format :: enum(),
                            Type :: enum(),
                            Table :: offset() | mem().

`gl:colorTable/6` may be used in two ways: to test the actual size and color resolution of a lookup table given a particular set of parameters, or to load the contents of a color lookup table. Use the targets `?GL_PROXY_*` for the first case and the other targets for the second case.

External documentation.

# colorTableParameterfv(Target, Pname, Params)

    -spec colorTableParameterfv(Target :: enum(), Pname :: enum(), Params :: {f(), f(), f(), f()}) -> ok.

Equivalent to `colorTableParameteriv/3`.

# colorTableParameteriv(Target, Pname, Params)

    -spec colorTableParameteriv(Target :: enum(), Pname :: enum(), Params :: {i(), i(), i(), i()}) -> ok.

`gl:colorTableParameter()` is used to specify the scale factors and bias terms applied to color components when they are loaded into a color table. `Target` indicates which color table the scale and bias terms apply to; it must be set to `?GL_COLOR_TABLE`, `?GL_POST_CONVOLUTION_COLOR_TABLE`, or `?GL_POST_COLOR_MATRIX_COLOR_TABLE`.

External documentation.

# compileShader(Shader)

    -spec compileShader(Shader :: i()) -> ok.

`gl:compileShader/1` compiles the source code strings that have been stored in the shader object specified by `Shader`.

External documentation.

# compressedTexImage1D(Target, Level, Internalformat, Width, Border, ImageSize, Data)

    -spec compressedTexImage1D(Target, Level, Internalformat, Width, Border, ImageSize, Data) -> ok
                                  when
                                      Target :: enum(),
                                      Level :: i(),
                                      Internalformat :: enum(),
                                      Width :: i(),
                                      Border :: i(),
                                      ImageSize :: i(),
                                      Data :: offset() | mem().

Texturing allows elements of an image array to be read by shaders.

External documentation.

# compressedTexImage2D(Target, Level, Internalformat, Width, Height, Border, ImageSize, Data)

    -spec compressedTexImage2D(Target, Level, Internalformat, Width, Height, Border, ImageSize, Data) -> ok
                                  when
                                      Target :: enum(),
                                      Level :: i(),
                                      Internalformat :: enum(),
                                      Width :: i(),
                                      Height :: i(),
                                      Border :: i(),
                                      ImageSize :: i(),
                                      Data :: offset() | mem().

Texturing allows elements of an image array to be read by shaders.

External documentation.

# compressedTexImage3D(Target, Level, Internalformat, Width, Height, Depth, Border, ImageSize, Data)

    -spec compressedTexImage3D(Target, Level, Internalformat, Width, Height, Depth, Border, ImageSize, Data) ->
                                  ok
                                  when
                                      Target :: enum(),
                                      Level :: i(),
                                      Internalformat :: enum(),
                                      Width :: i(),
                                      Height :: i(),
                                      Depth :: i(),
                                      Border :: i(),
                                      ImageSize :: i(),
                                      Data :: offset() | mem().

Texturing allows elements of an image array to be read by shaders.

External documentation.

# compressedTexSubImage1D(Target, Level, Xoffset, Width, Format, ImageSize, Data)

    -spec compressedTexSubImage1D(Target, Level, Xoffset, Width, Format, ImageSize, Data) -> ok
                                     when
                                         Target :: enum(),
                                         Level :: i(),
                                         Xoffset :: i(),
                                         Width :: i(),
                                         Format :: enum(),
                                         ImageSize :: i(),
                                         Data :: offset() | mem().

Equivalent to `compressedTextureSubImage1D/7`.

# compressedTexSubImage2D(Target, Level, Xoffset, Yoffset, Width, Height, Format, ImageSize, Data)

    -spec compressedTexSubImage2D(Target, Level, Xoffset, Yoffset, Width, Height, Format, ImageSize, Data) ->
                                     ok
                                     when
                                         Target :: enum(),
                                         Level :: i(),
                                         Xoffset :: i(),
                                         Yoffset :: i(),
                                         Width :: i(),
                                         Height :: i(),
                                         Format :: enum(),
                                         ImageSize :: i(),
                                         Data :: offset() | mem().

Equivalent to `compressedTextureSubImage2D/9`.

# compressedTexSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth, Format, ImageSize, Data)

    -spec compressedTexSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth, Format,
                                  ImageSize, Data) ->
                                     ok
                                     when
                                         Target :: enum(),
                                         Level :: i(),
                                         Xoffset :: i(),
                                         Yoffset :: i(),
                                         Zoffset :: i(),
                                         Width :: i(),
                                         Height :: i(),
                                         Depth :: i(),
                                         Format :: enum(),
                                         ImageSize :: i(),
                                         Data :: offset() | mem().

Equivalent to `compressedTextureSubImage3D/11`.

# compressedTextureSubImage1D(Texture, Level, Xoffset, Width, Format, ImageSize, Data)

    -spec compressedTextureSubImage1D(Texture, Level, Xoffset, Width, Format, ImageSize, Data) -> ok
                                         when
                                             Texture :: i(),
                                             Level :: i(),
                                             Xoffset :: i(),
                                             Width :: i(),
                                             Format :: enum(),
                                             ImageSize :: i(),
                                             Data :: offset() | mem().

Texturing allows elements of an image array to be read by shaders.

External documentation.

# compressedTextureSubImage2D(Texture, Level, Xoffset, Yoffset, Width, Height, Format, ImageSize, Data)

    -spec compressedTextureSubImage2D(Texture, Level, Xoffset, Yoffset, Width, Height, Format, ImageSize,
                                      Data) ->
                                         ok
                                         when
                                             Texture :: i(),
                                             Level :: i(),
                                             Xoffset :: i(),
                                             Yoffset :: i(),
                                             Width :: i(),
                                             Height :: i(),
                                             Format :: enum(),
                                             ImageSize :: i(),
                                             Data :: offset() | mem().

Texturing allows elements of an image array to be read by shaders.

External documentation.

# compressedTextureSubImage3D(Texture, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth, Format, ImageSize, Data)

    -spec compressedTextureSubImage3D(Texture, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth,
                                      Format, ImageSize, Data) ->
                                         ok
                                         when
                                             Texture :: i(),
                                             Level :: i(),
                                             Xoffset :: i(),
                                             Yoffset :: i(),
                                             Zoffset :: i(),
                                             Width :: i(),
                                             Height :: i(),
                                             Depth :: i(),
                                             Format :: enum(),
                                             ImageSize :: i(),
                                             Data :: offset() | mem().

Texturing allows elements of an image array to be read by shaders.

External documentation.

# convolutionFilter1D(Target, Internalformat, Width, Format, Type, Image)

    -spec convolutionFilter1D(Target, Internalformat, Width, Format, Type, Image) -> ok
                                 when
                                     Target :: enum(),
                                     Internalformat :: enum(),
                                     Width :: i(),
                                     Format :: enum(),
                                     Type :: enum(),
                                     Image :: offset() | mem().

`gl:convolutionFilter1D/6` builds a one-dimensional convolution filter kernel from an array of pixels.

External documentation.

# convolutionFilter2D(Target, Internalformat, Width, Height, Format, Type, Image)

    -spec convolutionFilter2D(Target, Internalformat, Width, Height, Format, Type, Image) -> ok
                                 when
                                     Target :: enum(),
                                     Internalformat :: enum(),
                                     Width :: i(),
                                     Height :: i(),
                                     Format :: enum(),
                                     Type :: enum(),
                                     Image :: offset() | mem().

`gl:convolutionFilter2D/7` builds a two-dimensional convolution filter kernel from an array of pixels.

External documentation.

# convolutionParameterf(Target, Pname, Params)

    -spec convolutionParameterf(Target :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

Equivalent to `convolutionParameteriv/3`.

# convolutionParameterfv(Target, Pname, Params)

    -spec convolutionParameterfv(Target :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

Equivalent to `convolutionParameteriv/3`.

# convolutionParameteri(Target, Pname, Params)

    -spec convolutionParameteri(Target :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

Equivalent to `convolutionParameteriv/3`.

# convolutionParameteriv(Target, Pname, Params)

    -spec convolutionParameteriv(Target :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

`gl:convolutionParameter()` sets the value of a convolution parameter.

External documentation.

# copyBufferSubData(ReadTarget, WriteTarget, ReadOffset, WriteOffset, Size)

    -spec copyBufferSubData(ReadTarget, WriteTarget, ReadOffset, WriteOffset, Size) -> ok
                               when
                                   ReadTarget :: enum(),
                                   WriteTarget :: enum(),
                                   ReadOffset :: i(),
                                   WriteOffset :: i(),
                                   Size :: i().

`gl:copyBufferSubData/5` and `glCopyNamedBufferSubData` copy part of the data store attached to a source buffer object to the data store attached to a destination buffer object. The number of basic machine units indicated by `Size` is copied from the source at offset `ReadOffset` to the destination at `WriteOffset`. `ReadOffset`, `WriteOffset` and `Size` are in terms of basic machine units.

External documentation.

# copyColorSubTable(Target, Start, X, Y, Width)

    -spec copyColorSubTable(Target :: enum(), Start :: i(), X :: i(), Y :: i(), Width :: i()) -> ok.

`gl:copyColorSubTable/5` is used to respecify a contiguous portion of a color table previously defined using `gl:colorTable/6`. The pixels copied from the framebuffer replace the portion of the existing table from indices `Start` to start+x-1, inclusive. This region may not include any entries outside the range of the color table, as was originally specified. It is not an error to specify a subtexture with width of 0, but such a specification has no effect.

External documentation.

# copyColorTable(Target, Internalformat, X, Y, Width)

    -spec copyColorTable(Target :: enum(), Internalformat :: enum(), X :: i(), Y :: i(), Width :: i()) -> ok.

`gl:copyColorTable/5` loads a color table with pixels from the current `?GL_READ_BUFFER` (rather than from main memory, as is the case for `gl:colorTable/6`).

External documentation.

# copyConvolutionFilter1D(Target, Internalformat, X, Y, Width)

    -spec copyConvolutionFilter1D(Target :: enum(),
                                  Internalformat :: enum(),
                                  X :: i(),
                                  Y :: i(),
                                  Width :: i()) ->
                                     ok.

`gl:copyConvolutionFilter1D/5` defines a one-dimensional convolution filter kernel with pixels from the current `?GL_READ_BUFFER` (rather than from main memory, as is the case for `gl:convolutionFilter1D/6`).

External documentation.

# copyConvolutionFilter2D(Target, Internalformat, X, Y, Width, Height)

    -spec copyConvolutionFilter2D(Target :: enum(),
                                  Internalformat :: enum(),
                                  X :: i(),
                                  Y :: i(),
                                  Width :: i(),
                                  Height :: i()) ->
                                     ok.

`gl:copyConvolutionFilter2D/6` defines a two-dimensional convolution filter kernel with pixels from the current `?GL_READ_BUFFER` (rather than from main memory, as is the case for `gl:convolutionFilter2D/7`).

External documentation.

# copyImageSubData(SrcName, SrcTarget, SrcLevel, SrcX, SrcY, SrcZ, DstName, DstTarget, DstLevel, DstX, DstY, DstZ, SrcWidth, SrcHeight, SrcDepth)

    -spec copyImageSubData(SrcName, SrcTarget, SrcLevel, SrcX, SrcY, SrcZ, DstName, DstTarget, DstLevel,
                           DstX, DstY, DstZ, SrcWidth, SrcHeight, SrcDepth) ->
                              ok
                              when
                                  SrcName :: i(),
                                  SrcTarget :: enum(),
                                  SrcLevel :: i(),
                                  SrcX :: i(),
                                  SrcY :: i(),
                                  SrcZ :: i(),
                                  DstName :: i(),
                                  DstTarget :: enum(),
                                  DstLevel :: i(),
                                  DstX :: i(),
                                  DstY :: i(),
                                  DstZ :: i(),
                                  SrcWidth :: i(),
                                  SrcHeight :: i(),
                                  SrcDepth :: i().

`gl:copyImageSubData/15` may be used to copy data from one image (i.e. texture or renderbuffer) to another. `gl:copyImageSubData/15` does not perform general-purpose conversions such as scaling, resizing, blending, color-space, or format conversions. It should be considered to operate in a manner similar to a CPU memcpy. CopyImageSubData can copy between images with different internal formats, provided the formats are compatible.

External documentation.

# copyPixels(X, Y, Width, Height, Type)

    -spec copyPixels(X :: i(), Y :: i(), Width :: i(), Height :: i(), Type :: enum()) -> ok.

`gl:copyPixels/5` copies a screen-aligned rectangle of pixels from the specified frame buffer location to a region relative to the current raster position. Its operation is well defined only if the entire pixel source region is within the exposed portion of the window. Results of copies from outside the window, or from regions of the window that are not exposed, are hardware dependent and undefined.

External documentation.

# copyTexImage1D(Target, Level, Internalformat, X, Y, Width, Border)

    -spec copyTexImage1D(Target, Level, Internalformat, X, Y, Width, Border) -> ok
                            when
                                Target :: enum(),
                                Level :: i(),
                                Internalformat :: enum(),
                                X :: i(),
                                Y :: i(),
                                Width :: i(),
                                Border :: i().

`gl:copyTexImage1D/7` defines a one-dimensional texture image with pixels from the current `?GL_READ_BUFFER`.

External documentation.

# copyTexImage2D(Target, Level, Internalformat, X, Y, Width, Height, Border)

    -spec copyTexImage2D(Target, Level, Internalformat, X, Y, Width, Height, Border) -> ok
                            when
                                Target :: enum(),
                                Level :: i(),
                                Internalformat :: enum(),
                                X :: i(),
                                Y :: i(),
                                Width :: i(),
                                Height :: i(),
                                Border :: i().

`gl:copyTexImage2D/8` defines a two-dimensional texture image, or cube-map texture image with pixels from the current `?GL_READ_BUFFER`.

External documentation.

# copyTexSubImage1D(Target, Level, Xoffset, X, Y, Width)

    -spec copyTexSubImage1D(Target :: enum(),
                            Level :: i(),
                            Xoffset :: i(),
                            X :: i(),
                            Y :: i(),
                            Width :: i()) ->
                               ok.

`gl:copyTexSubImage1D/6` and `glCopyTextureSubImage1D` replace a portion of a one-dimensional texture image with pixels from the current `?GL_READ_BUFFER` (rather than from main memory, as is the case for `gl:texSubImage1D/7`). For `gl:copyTexSubImage1D/6`, the texture object that is bound to `Target` will be used for the process. For `glCopyTextureSubImage1D`, `Texture` tells which texture object should be used for the purpose of the call.

External documentation.

# copyTexSubImage2D(Target, Level, Xoffset, Yoffset, X, Y, Width, Height)

    -spec copyTexSubImage2D(Target, Level, Xoffset, Yoffset, X, Y, Width, Height) -> ok
                               when
                                   Target :: enum(),
                                   Level :: i(),
                                   Xoffset :: i(),
                                   Yoffset :: i(),
                                   X :: i(),
                                   Y :: i(),
                                   Width :: i(),
                                   Height :: i().

`gl:copyTexSubImage2D/8` and `glCopyTextureSubImage2D` replace a rectangular portion of a two-dimensional texture image, cube-map texture image, rectangular image, or a linear portion of a number of slices of a one-dimensional array texture with pixels from the current `?GL_READ_BUFFER` (rather than from main memory, as is the case for `gl:texSubImage2D/9`).

External documentation.

# copyTexSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset, X, Y, Width, Height)

    -spec copyTexSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset, X, Y, Width, Height) -> ok
                               when
                                   Target :: enum(),
                                   Level :: i(),
                                   Xoffset :: i(),
                                   Yoffset :: i(),
                                   Zoffset :: i(),
                                   X :: i(),
                                   Y :: i(),
                                   Width :: i(),
                                   Height :: i().

`gl:copyTexSubImage3D/9` and `glCopyTextureSubImage3D` functions replace a rectangular portion of a three-dimensional or two-dimensional array texture image with pixels from the current `?GL_READ_BUFFER` (rather than from main memory, as is the case for `gl:texSubImage3D/11`).

External documentation.

# createBuffers(N)

    -spec createBuffers(N :: i()) -> [i()].

`gl:createBuffers/1` returns `N` previously unused buffer names in `Buffers`, each representing a new buffer object initialized as if it had been bound to an unspecified target.

External documentation.

# createFramebuffers(N)

    -spec createFramebuffers(N :: i()) -> [i()].

`gl:createFramebuffers/1` returns `N` previously unused framebuffer names in `Framebuffers`, each representing a new framebuffer object initialized to the default state.

External documentation.

# createProgram()

    -spec createProgram() -> i().

`gl:createProgram/0` creates an empty program object and returns a non-zero value by which it can be referenced. A program object is an object to which shader objects can be attached. This provides a mechanism to specify the shader objects that will be linked to create a program. It also provides a means for checking the compatibility of the shaders that will be used to create a program (for instance, checking the compatibility between a vertex shader and a fragment shader). When no longer needed as part of a program object, shader objects can be detached.

External documentation.

# createProgramPipelines(N)

    -spec createProgramPipelines(N :: i()) -> [i()].

`gl:createProgramPipelines/1` returns `N` previously unused program pipeline names in `Pipelines`, each representing a new program pipeline object initialized to the default state.

External documentation.

# createQueries(Target, N)

    -spec createQueries(Target :: enum(), N :: i()) -> [i()].

`gl:createQueries/2` returns `N` previously unused query object names in `Ids`, each representing a new query object with the specified `Target`.

External documentation.

# createRenderbuffers(N)

    -spec createRenderbuffers(N :: i()) -> [i()].

`gl:createRenderbuffers/1` returns `N` previously unused renderbuffer object names in `Renderbuffers`, each representing a new renderbuffer object initialized to the default state.

External documentation.

# createSamplers(N)

    -spec createSamplers(N :: i()) -> [i()].

`gl:createSamplers/1` returns `N` previously unused sampler names in `Samplers`, each representing a new sampler object initialized to the default state.

External documentation.

# createShader(Type)

    -spec createShader(Type :: enum()) -> i().

`gl:createShader/1` creates an empty shader object and returns a non-zero value by which it can be referenced. A shader object is used to maintain the source code strings that define a shader. `ShaderType` indicates the type of shader to be created. Five types of shader are supported. A shader of type `?GL_COMPUTE_SHADER` is a shader that is intended to run on the programmable compute processor. A shader of type `?GL_VERTEX_SHADER` is a shader that is intended to run on the programmable vertex processor. A shader of type `?GL_TESS_CONTROL_SHADER` is a shader that is intended to run on the programmable tessellation processor in the control stage. A shader of type `?GL_TESS_EVALUATION_SHADER` is a shader that is intended to run on the programmable tessellation processor in the evaluation stage. A shader of type `?GL_GEOMETRY_SHADER` is a shader that is intended to run on the programmable geometry processor. A shader of type `?GL_FRAGMENT_SHADER` is a shader that is intended to run on the programmable fragment processor.

External documentation.

# createShaderProgramv(Type, Strings)

    -spec createShaderProgramv(Type :: enum(), Strings :: [unicode:chardata()]) -> i().

`gl:createShaderProgram()` creates a program object containing compiled and linked shaders for a single stage specified by `Type`. `Strings` refers to an array of `Count` strings from which to create the shader executables.

External documentation.

# createTextures(Target, N)

    -spec createTextures(Target :: enum(), N :: i()) -> [i()].

`gl:createTextures/2` returns `N` previously unused texture names in `Textures`, each representing a new texture object of the dimensionality and type specified by `Target` and initialized to the default values for that texture type.

External documentation.

# createTransformFeedbacks(N)

    -spec createTransformFeedbacks(N :: i()) -> [i()].

`gl:createTransformFeedbacks/1` returns `N` previously unused transform feedback object names in `Ids`, each representing a new transform feedback object initialized to the default state.

External documentation.

# createVertexArrays(N)

    -spec createVertexArrays(N :: i()) -> [i()].

`gl:createVertexArrays/1` returns `N` previously unused vertex array object names in `Arrays`, each representing a new vertex array object initialized to the default state.

External documentation.

# cullFace(Mode)

    -spec cullFace(Mode :: enum()) -> ok.

`gl:cullFace/1` specifies whether front- or back-facing facets are culled (as specified by `mode`) when facet culling is enabled. Facet culling is initially disabled. To enable and disable facet culling, call the `gl:enable/1` and `gl:disable/1` commands with the argument `?GL_CULL_FACE`. Facets include triangles, quadrilaterals, polygons, and rectangles.

External documentation.

# debugMessageControl(Source, Type, Severity, Ids, Enabled)

    -spec debugMessageControl(Source :: enum(),
                              Type :: enum(),
                              Severity :: enum(),
                              Ids :: [i()],
                              Enabled :: 0 | 1) ->
                                 ok.

`gl:debugMessageControl/5` controls the reporting of debug messages generated by a debug context. The parameters `Source`, `Type` and `Severity` form a filter to select messages from the pool of potential messages generated by the GL.

External documentation.

# debugMessageInsert(Source, Type, Id, Severity, Buf)

    -spec debugMessageInsert(Source :: enum(),
                             Type :: enum(),
                             Id :: i(),
                             Severity :: enum(),
                             Buf :: string()) ->
                                ok.

`gl:debugMessageInsert/5` inserts a user-supplied message into the debug output queue. `Source` specifies the source that will be used to classify the message and must be `?GL_DEBUG_SOURCE_APPLICATION` or `?GL_DEBUG_SOURCE_THIRD_PARTY`. All other sources are reserved for use by the GL implementation. `Type` indicates the type of the message to be inserted and may be one of `?GL_DEBUG_TYPE_ERROR`, `?GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR`, `?GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR`, `?GL_DEBUG_TYPE_PORTABILITY`, `?GL_DEBUG_TYPE_PERFORMANCE`, `?GL_DEBUG_TYPE_MARKER`, `?GL_DEBUG_TYPE_PUSH_GROUP`, `?GL_DEBUG_TYPE_POP_GROUP`, or `?GL_DEBUG_TYPE_OTHER`. `Severity` indicates the severity of the message and may be `?GL_DEBUG_SEVERITY_LOW`, `?GL_DEBUG_SEVERITY_MEDIUM`, `?GL_DEBUG_SEVERITY_HIGH` or `?GL_DEBUG_SEVERITY_NOTIFICATION`. `Id` is available for application defined use and may be any value. This value will be recorded and used to identify the message.

External documentation.

# deleteBuffers(Buffers)

    -spec deleteBuffers(Buffers :: [i()]) -> ok.

`gl:deleteBuffers/1` deletes `N` buffer objects named by the elements of the array `Buffers`. After a buffer object is deleted, it has no contents, and its name is free for reuse (for example by `gl:genBuffers/1`). If a buffer object that is currently bound is deleted, the binding reverts to 0 (the absence of any buffer object).

External documentation.

# deleteFramebuffers(Framebuffers)

    -spec deleteFramebuffers(Framebuffers :: [i()]) -> ok.

`gl:deleteFramebuffers/1` deletes the `N` framebuffer objects whose names are stored in the array addressed by `Framebuffers`. The name zero is reserved by the GL and is silently ignored, should it occur in `Framebuffers`, as are other unused names. Once a framebuffer object is deleted, its name is again unused and it has no attachments. If a framebuffer that is currently bound to one or more of the targets `?GL_DRAW_FRAMEBUFFER` or `?GL_READ_FRAMEBUFFER` is deleted, it is as though `gl:bindFramebuffer/2` had been executed with the corresponding `Target` and `Framebuffer` zero.

External documentation.

# deleteLists(List, Range)

    -spec deleteLists(List :: i(), Range :: i()) -> ok.

`gl:deleteLists/2` causes a contiguous group of display lists to be deleted. `List` is the name of the first display list to be deleted, and `Range` is the number of display lists to delete. All display lists d with list&lt;= d&lt;= list+range-1 are deleted.

External documentation.

# deleteProgram(Program)

    -spec deleteProgram(Program :: i()) -> ok.

`gl:deleteProgram/1` frees the memory and invalidates the name associated with the program object specified by `Program.` This command effectively undoes the effects of a call to `gl:createProgram/0`.

External documentation.

# deleteProgramPipelines(Pipelines)

    -spec deleteProgramPipelines(Pipelines :: [i()]) -> ok.

`gl:deleteProgramPipelines/1` deletes the `N` program pipeline objects whose names are stored in the array `Pipelines`. Unused names in `Pipelines` are ignored, as is the name zero. After a program pipeline object is deleted, its name is again unused and it has no contents. If program pipeline object that is currently bound is deleted, the binding for that object reverts to zero and no program pipeline object becomes current.

External documentation.

# deleteQueries(Ids)

    -spec deleteQueries(Ids :: [i()]) -> ok.

`gl:deleteQueries/1` deletes `N` query objects named by the elements of the array `Ids`. After a query object is deleted, it has no contents, and its name is free for reuse (for example by `gl:genQueries/1`).

External documentation.

# deleteRenderbuffers(Renderbuffers)

    -spec deleteRenderbuffers(Renderbuffers :: [i()]) -> ok.

`gl:deleteRenderbuffers/1` deletes the `N` renderbuffer objects whose names are stored in the array addressed by `Renderbuffers`. The name zero is reserved by the GL and is silently ignored, should it occur in `Renderbuffers`, as are other unused names. Once a renderbuffer object is deleted, its name is again unused and it has no contents. If a renderbuffer that is currently bound to the target `?GL_RENDERBUFFER` is deleted, it is as though `gl:bindRenderbuffer/2` had been executed with a `Target` of `?GL_RENDERBUFFER` and a `Name` of zero.

External documentation.

# deleteSamplers(Samplers)

    -spec deleteSamplers(Samplers :: [i()]) -> ok.

`gl:deleteSamplers/1` deletes `N` sampler objects named by the elements of the array `Samplers`. After a sampler object is deleted, its name is again unused. If a sampler object that is currently bound to a sampler unit is deleted, it is as though `gl:bindSampler/2` is called with unit set to the unit the sampler is bound to and sampler zero. Unused names in samplers are silently ignored, as is the reserved name zero.

External documentation.

# deleteShader(Shader)

    -spec deleteShader(Shader :: i()) -> ok.

`gl:deleteShader/1` frees the memory and invalidates the name associated with the shader object specified by `Shader`. This command effectively undoes the effects of a call to `gl:createShader/1`.

External documentation.

# deleteSync(Sync)

    -spec deleteSync(Sync :: i()) -> ok.

`gl:deleteSync/1` deletes the sync object specified by `Sync`. If the fence command corresponding to the specified sync object has completed, or if no `gl:waitSync/3` or `gl:clientWaitSync/3` commands are blocking on `Sync`, the object is deleted immediately. Otherwise, `Sync` is flagged for deletion and will be deleted when it is no longer associated with any fence command and is no longer blocking any `gl:waitSync/3` or `gl:clientWaitSync/3` command. In either case, after `gl:deleteSync/1` returns, the name `Sync` is invalid and can no longer be used to refer to the sync object.

External documentation.

# deleteTextures(Textures)

    -spec deleteTextures(Textures :: [i()]) -> ok.

`gl:deleteTextures/1` deletes `N` textures named by the elements of the array `Textures`. After a texture is deleted, it has no contents or dimensionality, and its name is free for reuse (for example by `gl:genTextures/1`). If a texture that is currently bound is deleted, the binding reverts to 0 (the default texture).

External documentation.

# deleteTransformFeedbacks(Ids)

    -spec deleteTransformFeedbacks(Ids :: [i()]) -> ok.

`gl:deleteTransformFeedbacks/1` deletes the `N` transform feedback objects whose names are stored in the array `Ids`. Unused names in `Ids` are ignored, as is the name zero. After a transform feedback object is deleted, its name is again unused and it has no contents. If an active transform feedback object is deleted, its name immediately becomes unused, but the underlying object is not deleted until it is no longer active.

External documentation.

# deleteVertexArrays(Arrays)

    -spec deleteVertexArrays(Arrays :: [i()]) -> ok.

`gl:deleteVertexArrays/1` deletes `N` vertex array objects whose names are stored in the array addressed by `Arrays`. Once a vertex array object is deleted it has no contents and its name is again unused. If a vertex array object that is currently bound is deleted, the binding for that object reverts to zero and the default vertex array becomes current. Unused names in `Arrays` are silently ignored, as is the value zero.

External documentation.

# depthFunc(Func)

    -spec depthFunc(Func :: enum()) -> ok.

`gl:depthFunc/1` specifies the function used to compare each incoming pixel depth value with the depth value present in the depth buffer. The comparison is performed only if depth testing is enabled. (See `gl:enable/1` and `gl:disable/1` of `?GL_DEPTH_TEST`.)

External documentation.

# depthMask(Flag)

    -spec depthMask(Flag :: 0 | 1) -> ok.

`gl:depthMask/1` specifies whether the depth buffer is enabled for writing. If `Flag` is `?GL_FALSE`, depth buffer writing is disabled. Otherwise, it is enabled. Initially, depth buffer writing is enabled.

External documentation.

# depthRange(Near_val, Far_val)

    -spec depthRange(Near_val :: clamp(), Far_val :: clamp()) -> ok.

Equivalent to `depthRangef/2`.

# depthRangeArrayv(First, V)

    -spec depthRangeArrayv(First :: i(), V :: [{f(), f()}]) -> ok.

After clipping and division by `w`, depth coordinates range from -1 to 1, corresponding to the near and far clipping planes. Each viewport has an independent depth range specified as a linear mapping of the normalized depth coordinates in this range to window depth coordinates. Regardless of the actual depth buffer implementation, window coordinate depth values are treated as though they range from 0 through 1 (like color components). `gl:depthRangeArray()` specifies a linear mapping of the normalized depth coordinates in this range to window depth coordinates for each viewport in the range [`First`, `First` + `Count`). Thus, the values accepted by `gl:depthRangeArray()` are both clamped to this range before they are accepted.

External documentation.

# depthRangef(N, F)

    -spec depthRangef(N :: f(), F :: f()) -> ok.

After clipping and division by `w`, depth coordinates range from -1 to 1, corresponding to the near and far clipping planes. `gl:depthRange/2` specifies a linear mapping of the normalized depth coordinates in this range to window depth coordinates. Regardless of the actual depth buffer implementation, window coordinate depth values are treated as though they range from 0 through 1 (like color components). Thus, the values accepted by `gl:depthRange/2` are both clamped to this range before they are accepted.

External documentation.

# depthRangeIndexed(Index, N, F)

    -spec depthRangeIndexed(Index :: i(), N :: f(), F :: f()) -> ok.

After clipping and division by `w`, depth coordinates range from -1 to 1, corresponding to the near and far clipping planes. Each viewport has an independent depth range specified as a linear mapping of the normalized depth coordinates in this range to window depth coordinates. Regardless of the actual depth buffer implementation, window coordinate depth values are treated as though they range from 0 through 1 (like color components). `gl:depthRangeIndexed/3` specifies a linear mapping of the normalized depth coordinates in this range to window depth coordinates for a specified viewport. Thus, the values accepted by `gl:depthRangeIndexed/3` are both clamped to this range before they are accepted.

External documentation.

# detachShader(Program, Shader)

    -spec detachShader(Program :: i(), Shader :: i()) -> ok.

`gl:detachShader/2` detaches the shader object specified by `Shader` from the program object specified by `Program`. This command can be used to undo the effect of the command `gl:attachShader/2`.

External documentation.

# disable(Cap)

    -spec disable(Cap :: enum()) -> ok.

Equivalent to `enablei/2`.

# disableClientState(Cap)

    -spec disableClientState(Cap :: enum()) -> ok.

Equivalent to `enableClientState/1`.

# disablei(Target, Index)

    -spec disablei(Target :: enum(), Index :: i()) -> ok.

Equivalent to `enablei/2`.

# disableVertexArrayAttrib(Vaobj, Index)

    -spec disableVertexArrayAttrib(Vaobj :: i(), Index :: i()) -> ok.

Equivalent to `enableVertexAttribArray/1`.

# disableVertexAttribArray(Index)

    -spec disableVertexAttribArray(Index :: i()) -> ok.

Equivalent to `enableVertexAttribArray/1`.

# dispatchCompute(Num_groups_x, Num_groups_y, Num_groups_z)

    -spec dispatchCompute(Num_groups_x :: i(), Num_groups_y :: i(), Num_groups_z :: i()) -> ok.

`gl:dispatchCompute/3` launches one or more compute work groups. Each work group is processed by the active program object for the compute shader stage. While the individual shader invocations within a work group are executed as a unit, work groups are executed completely independently and in unspecified order. `Num_groups_x`, `Num_groups_y` and `Num_groups_z` specify the number of local work groups that will be dispatched in the X, Y and Z dimensions, respectively.

External documentation.

# dispatchComputeIndirect(Indirect)

    -spec dispatchComputeIndirect(Indirect :: i()) -> ok.

`gl:dispatchComputeIndirect/1` launches one or more compute work groups using parameters stored in the buffer object currently bound to the `?GL_DISPATCH_INDIRECT_BUFFER` target. Each work group is processed by the active program object for the compute shader stage. While the individual shader invocations within a work group are executed as a unit, work groups are executed completely independently and in unspecified order. `Indirect` contains the offset into the data store of the buffer object bound to the `?GL_DISPATCH_INDIRECT_BUFFER` target at which the parameters are stored.

External documentation.

# drawArrays(Mode, First, Count)

    -spec drawArrays(Mode :: enum(), First :: i(), Count :: i()) -> ok.

`gl:drawArrays/3` specifies multiple geometric primitives with very few subroutine calls. Instead of calling a GL procedure to pass each individual vertex, normal, texture coordinate, edge flag, or color, you can prespecify separate arrays of vertices, normals, and colors and use them to construct a sequence of primitives with a single call to `gl:drawArrays/3`.

External documentation.

# drawArraysIndirect(Mode, Indirect)

    -spec drawArraysIndirect(Mode :: enum(), Indirect :: offset() | mem()) -> ok.

`gl:drawArraysIndirect/2` specifies multiple geometric primitives with very few subroutine calls. `gl:drawArraysIndirect/2` behaves similarly to `gl:drawArraysInstancedBaseInstance/5`, execept that the parameters to `gl:drawArraysInstancedBaseInstance/5` are stored in memory at the address given by `Indirect`.

External documentation.

# drawArraysInstanced(Mode, First, Count, Instancecount)

    -spec drawArraysInstanced(Mode :: enum(), First :: i(), Count :: i(), Instancecount :: i()) -> ok.

`gl:drawArraysInstanced/4` behaves identically to `gl:drawArrays/3` except that `Instancecount` instances of the range of elements are executed and the value of the internal counter `InstanceID` advances for each iteration. `InstanceID` is an internal 32-bit integer counter that may be read by a vertex shader as `?gl_InstanceID`.

External documentation.

# drawArraysInstancedBaseInstance(Mode, First, Count, Instancecount, Baseinstance)

    -spec drawArraysInstancedBaseInstance(Mode :: enum(),
                                          First :: i(),
                                          Count :: i(),
                                          Instancecount :: i(),
                                          Baseinstance :: i()) ->
                                             ok.

`gl:drawArraysInstancedBaseInstance/5` behaves identically to `gl:drawArrays/3` except that `Instancecount` instances of the range of elements are executed and the value of the internal counter `InstanceID` advances for each iteration. `InstanceID` is an internal 32-bit integer counter that may be read by a vertex shader as `?gl_InstanceID`.

External documentation.

# drawBuffer(Mode)

    -spec drawBuffer(Mode :: enum()) -> ok.

When colors are written to the frame buffer, they are written into the color buffers specified by `gl:drawBuffer/1`. One of the following values can be used for default framebuffer:

External documentation.

# drawBuffers(Bufs)

    -spec drawBuffers(Bufs :: [enum()]) -> ok.

`gl:drawBuffers/1` and `glNamedFramebufferDrawBuffers` define an array of buffers into which outputs from the fragment shader data will be written. If a fragment shader writes a value to one or more user defined output variables, then the value of each variable will be written into the buffer specified at a location within `Bufs` corresponding to the location assigned to that user defined output. The draw buffer used for user defined outputs assigned to locations greater than or equal to `N` is implicitly set to `?GL_NONE` and any data written to such an output is discarded.

External documentation.

# drawElements(Mode, Count, Type, Indices)

    -spec drawElements(Mode :: enum(), Count :: i(), Type :: enum(), Indices :: offset() | mem()) -> ok.

`gl:drawElements/4` specifies multiple geometric primitives with very few subroutine calls. Instead of calling a GL function to pass each individual vertex, normal, texture coordinate, edge flag, or color, you can prespecify separate arrays of vertices, normals, and so on, and use them to construct a sequence of primitives with a single call to `gl:drawElements/4`.

External documentation.

# drawElementsBaseVertex(Mode, Count, Type, Indices, Basevertex)

    -spec drawElementsBaseVertex(Mode, Count, Type, Indices, Basevertex) -> ok
                                    when
                                        Mode :: enum(),
                                        Count :: i(),
                                        Type :: enum(),
                                        Indices :: offset() | mem(),
                                        Basevertex :: i().

`gl:drawElementsBaseVertex/5` behaves identically to `gl:drawElements/4` except that the `i`th element transferred by the corresponding draw call will be taken from element `Indices`[i] + `Basevertex` of each enabled array. If the resulting value is larger than the maximum value representable by `Type`, it is as if the calculation were upconverted to 32-bit unsigned integers (with wrapping on overflow conditions). The operation is undefined if the sum would be negative.

External documentation.

# drawElementsIndirect(Mode, Type, Indirect)

    -spec drawElementsIndirect(Mode :: enum(), Type :: enum(), Indirect :: offset() | mem()) -> ok.

`gl:drawElementsIndirect/3` specifies multiple indexed geometric primitives with very few subroutine calls. `gl:drawElementsIndirect/3` behaves similarly to `gl:drawElementsInstancedBaseVertexBaseInstance/7`, execpt that the parameters to `gl:drawElementsInstancedBaseVertexBaseInstance/7` are stored in memory at the address given by `Indirect`.

External documentation.

# drawElementsInstanced(Mode, Count, Type, Indices, Instancecount)

    -spec drawElementsInstanced(Mode, Count, Type, Indices, Instancecount) -> ok
                                   when
                                       Mode :: enum(),
                                       Count :: i(),
                                       Type :: enum(),
                                       Indices :: offset() | mem(),
                                       Instancecount :: i().

`gl:drawElementsInstanced/5` behaves identically to `gl:drawElements/4` except that `Instancecount` instances of the set of elements are executed and the value of the internal counter `InstanceID` advances for each iteration. `InstanceID` is an internal 32-bit integer counter that may be read by a vertex shader as `?gl_InstanceID`.

External documentation.

# drawElementsInstancedBaseInstance(Mode, Count, Type, Indices, Instancecount, Baseinstance)

    -spec drawElementsInstancedBaseInstance(Mode, Count, Type, Indices, Instancecount, Baseinstance) -> ok
                                               when
                                                   Mode :: enum(),
                                                   Count :: i(),
                                                   Type :: enum(),
                                                   Indices :: offset() | mem(),
                                                   Instancecount :: i(),
                                                   Baseinstance :: i().

`gl:drawElementsInstancedBaseInstance/6` behaves identically to `gl:drawElements/4` except that `Instancecount` instances of the set of elements are executed and the value of the internal counter `InstanceID` advances for each iteration. `InstanceID` is an internal 32-bit integer counter that may be read by a vertex shader as `?gl_InstanceID`.

External documentation.

# drawElementsInstancedBaseVertex(Mode, Count, Type, Indices, Instancecount, Basevertex)

    -spec drawElementsInstancedBaseVertex(Mode, Count, Type, Indices, Instancecount, Basevertex) -> ok
                                             when
                                                 Mode :: enum(),
                                                 Count :: i(),
                                                 Type :: enum(),
                                                 Indices :: offset() | mem(),
                                                 Instancecount :: i(),
                                                 Basevertex :: i().

`gl:drawElementsInstancedBaseVertex/6` behaves identically to `gl:drawElementsInstanced/5` except that the `i`th element transferred by the corresponding draw call will be taken from element `Indices`[i] + `Basevertex` of each enabled array. If the resulting value is larger than the maximum value representable by `Type`, it is as if the calculation were upconverted to 32-bit unsigned integers (with wrapping on overflow conditions). The operation is undefined if the sum would be negative.

External documentation.

# drawElementsInstancedBaseVertexBaseInstance(Mode, Count, Type, Indices, Instancecount, Basevertex, Baseinstance)

    -spec drawElementsInstancedBaseVertexBaseInstance(Mode, Count, Type, Indices, Instancecount, Basevertex,
                                                      Baseinstance) ->
                                                         ok
                                                         when
                                                             Mode :: enum(),
                                                             Count :: i(),
                                                             Type :: enum(),
                                                             Indices :: offset() | mem(),
                                                             Instancecount :: i(),
                                                             Basevertex :: i(),
                                                             Baseinstance :: i().

`gl:drawElementsInstancedBaseVertexBaseInstance/7` behaves identically to `gl:drawElementsInstanced/5` except that the `i`th element transferred by the corresponding draw call will be taken from element `Indices`[i] + `Basevertex` of each enabled array. If the resulting value is larger than the maximum value representable by `Type`, it is as if the calculation were upconverted to 32-bit unsigned integers (with wrapping on overflow conditions). The operation is undefined if the sum would be negative.

External documentation.

# drawPixels(Width, Height, Format, Type, Pixels)

    -spec drawPixels(Width :: i(),
                     Height :: i(),
                     Format :: enum(),
                     Type :: enum(),
                     Pixels :: offset() | mem()) ->
                        ok.

`gl:drawPixels/5` reads pixel data from memory and writes it into the frame buffer relative to the current raster position, provided that the raster position is valid. Use `gl:rasterPos()` or `gl:windowPos()` to set the current raster position; use `gl:get()` with argument `?GL_CURRENT_RASTER_POSITION_VALID` to determine if the specified raster position is valid, and `gl:get()` with argument `?GL_CURRENT_RASTER_POSITION` to query the raster position.

External documentation.

# drawRangeElements(Mode, Start, End, Count, Type, Indices)

    -spec drawRangeElements(Mode, Start, End, Count, Type, Indices) -> ok
                               when
                                   Mode :: enum(),
                                   Start :: i(),
                                   End :: i(),
                                   Count :: i(),
                                   Type :: enum(),
                                   Indices :: offset() | mem().

`gl:drawRangeElements/6` is a restricted form of `gl:drawElements/4`. `Mode`, and `Count` match the corresponding arguments to `gl:drawElements/4`, with the additional constraint that all values in the arrays `Count` must lie between `Start` and `End`, inclusive.

External documentation.

# drawRangeElementsBaseVertex(Mode, Start, End, Count, Type, Indices, Basevertex)

    -spec drawRangeElementsBaseVertex(Mode, Start, End, Count, Type, Indices, Basevertex) -> ok
                                         when
                                             Mode :: enum(),
                                             Start :: i(),
                                             End :: i(),
                                             Count :: i(),
                                             Type :: enum(),
                                             Indices :: offset() | mem(),
                                             Basevertex :: i().

`gl:drawRangeElementsBaseVertex/7` is a restricted form of `gl:drawElementsBaseVertex/5`. `Mode`, `Count` and `Basevertex` match the corresponding arguments to `gl:drawElementsBaseVertex/5`, with the additional constraint that all values in the array `Indices` must lie between `Start` and `End`, inclusive, prior to adding `Basevertex`. Index values lying outside the range [`Start`, `End`] are treated in the same way as `gl:drawElementsBaseVertex/5`. The `i`th element transferred by the corresponding draw call will be taken from element `Indices`[i] + `Basevertex` of each enabled array. If the resulting value is larger than the maximum value representable by `Type`, it is as if the calculation were upconverted to 32-bit unsigned integers (with wrapping on overflow conditions). The operation is undefined if the sum would be negative.

External documentation.

# drawTransformFeedback(Mode, Id)

    -spec drawTransformFeedback(Mode :: enum(), Id :: i()) -> ok.

`gl:drawTransformFeedback/2` draws primitives of a type specified by `Mode` using a count retrieved from the transform feedback specified by `Id`. Calling `gl:drawTransformFeedback/2` is equivalent to calling `gl:drawArrays/3` with `Mode` as specified, `First` set to zero, and `Count` set to the number of vertices captured on vertex stream zero the last time transform feedback was active on the transform feedback object named by `Id`.

External documentation.

# drawTransformFeedbackInstanced(Mode, Id, Instancecount)

    -spec drawTransformFeedbackInstanced(Mode :: enum(), Id :: i(), Instancecount :: i()) -> ok.

`gl:drawTransformFeedbackInstanced/3` draws multiple copies of a range of primitives of a type specified by `Mode` using a count retrieved from the transform feedback stream specified by `Stream` of the transform feedback object specified by `Id`. Calling `gl:drawTransformFeedbackInstanced/3` is equivalent to calling `gl:drawArraysInstanced/4` with `Mode` and `Instancecount` as specified, `First` set to zero, and `Count` set to the number of vertices captured on vertex stream zero the last time transform feedback was active on the transform feedback object named by `Id`.

External documentation.

# drawTransformFeedbackStream(Mode, Id, Stream)

    -spec drawTransformFeedbackStream(Mode :: enum(), Id :: i(), Stream :: i()) -> ok.

`gl:drawTransformFeedbackStream/3` draws primitives of a type specified by `Mode` using a count retrieved from the transform feedback stream specified by `Stream` of the transform feedback object specified by `Id`. Calling `gl:drawTransformFeedbackStream/3` is equivalent to calling `gl:drawArrays/3` with `Mode` as specified, `First` set to zero, and `Count` set to the number of vertices captured on vertex stream `Stream` the last time transform feedback was active on the transform feedback object named by `Id`.

External documentation.

# drawTransformFeedbackStreamInstanced(Mode, Id, Stream, Instancecount)

    -spec drawTransformFeedbackStreamInstanced(Mode :: enum(),
                                               Id :: i(),
                                               Stream :: i(),
                                               Instancecount :: i()) ->
                                                  ok.

`gl:drawTransformFeedbackStreamInstanced/4` draws multiple copies of a range of primitives of a type specified by `Mode` using a count retrieved from the transform feedback stream specified by `Stream` of the transform feedback object specified by `Id`. Calling `gl:drawTransformFeedbackStreamInstanced/4` is equivalent to calling `gl:drawArraysInstanced/4` with `Mode` and `Instancecount` as specified, `First` set to zero, and `Count` set to the number of vertices captured on vertex stream `Stream` the last time transform feedback was active on the transform feedback object named by `Id`.

External documentation.

# edgeFlag(Flag)

    -spec edgeFlag(Flag :: 0 | 1) -> ok.

Equivalent to `edgeFlagv/1`.

# edgeFlagPointer(Stride, Ptr)

    -spec edgeFlagPointer(Stride :: i(), Ptr :: offset() | mem()) -> ok.

`gl:edgeFlagPointer/2` specifies the location and data format of an array of boolean edge flags to use when rendering. `Stride` specifies the byte stride from one edge flag to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays.

External documentation.

# edgeFlagv/1

    -spec edgeFlagv({Flag :: 0 | 1}) -> ok.

Each vertex of a polygon, separate triangle, or separate quadrilateral specified between a `gl:'begin'/1`/`gl:'end'/0` pair is marked as the start of either a boundary or nonboundary edge. If the current edge flag is true when the vertex is specified, the vertex is marked as the start of a boundary edge. Otherwise, the vertex is marked as the start of a nonboundary edge. `gl:edgeFlag/1` sets the edge flag bit to `?GL_TRUE` if `Flag` is `?GL_TRUE` and to `?GL_FALSE` otherwise.

External documentation.

# enable(Cap)

    -spec enable(Cap :: enum()) -> ok.

Equivalent to `enablei/2`.

# enableClientState(Cap)

    -spec enableClientState(Cap :: enum()) -> ok.

`gl:enableClientState/1` and `gl:disableClientState/1` enable or disable individual client-side capabilities. By default, all client-side capabilities are disabled. Both `gl:enableClientState/1` and `gl:disableClientState/1` take a single argument, `Cap`, which can assume one of the following values:

External documentation.

# enablei(Target, Index)

    -spec enablei(Target :: enum(), Index :: i()) -> ok.

`gl:enable/1` and `gl:disable/1` enable and disable various capabilities. Use `gl:isEnabled/1` or `gl:get()` to determine the current setting of any capability. The initial value for each capability with the exception of `?GL_DITHER` and `?GL_MULTISAMPLE` is `?GL_FALSE`. The initial value for `?GL_DITHER` and `?GL_MULTISAMPLE` is `?GL_TRUE`.

External documentation.

# enableVertexArrayAttrib(Vaobj, Index)

    -spec enableVertexArrayAttrib(Vaobj :: i(), Index :: i()) -> ok.

Equivalent to `enableVertexAttribArray/1`.

# enableVertexAttribArray(Index)

    -spec enableVertexAttribArray(Index :: i()) -> ok.

`gl:enableVertexAttribArray/1` and `gl:enableVertexArrayAttrib/2` enable the generic vertex attribute array specified by `Index`. `gl:enableVertexAttribArray/1` uses currently bound vertex array object for the operation, whereas `gl:enableVertexArrayAttrib/2` updates state of the vertex array object with ID `Vaobj`.

External documentation.

# 'end'()

    -spec 'end'() -> ok.

`gl:'begin'/1` and `gl:'end'/0` delimit the vertices that define a primitive or a group of like primitives. `gl:'begin'/1` accepts a single argument that specifies in which of ten ways the vertices are interpreted. Taking n as an integer count starting at one, and N as the total number of vertices specified, the interpretations are as follows:

External documentation.

# endConditionalRender()

    -spec endConditionalRender() -> ok.

Conditional rendering is started using `gl:beginConditionalRender/2` and ended using `gl:endConditionalRender/0`. During conditional rendering, all vertex array commands, as well as `gl:clear/1` and `gl:clearBuffer()` have no effect if the (`?GL_SAMPLES_PASSED`) result of the query object `Id` is zero, or if the (`?GL_ANY_SAMPLES_PASSED`) result is `?GL_FALSE`. The results of commands setting the current vertex state, such as `gl:vertexAttrib()` are undefined. If the (`?GL_SAMPLES_PASSED`) result is non-zero or if the (`?GL_ANY_SAMPLES_PASSED`) result is `?GL_TRUE`, such commands are not discarded. The `Id` parameter to `gl:beginConditionalRender/2` must be the name of a query object previously returned from a call to `gl:genQueries/1`. `Mode` specifies how the results of the query object are to be interpreted. If `Mode` is `?GL_QUERY_WAIT`, the GL waits for the results of the query to be available and then uses the results to determine if subsequent rendering commands are discarded. If `Mode` is `?GL_QUERY_NO_WAIT`, the GL may choose to unconditionally execute the subsequent rendering commands without waiting for the query to complete.

External documentation.

# endList()

    -spec endList() -> ok.

Equivalent to `newList/2`.

# endQuery(Target)

    -spec endQuery(Target :: enum()) -> ok.

`gl:beginQuery/2` and `gl:endQuery/1` delimit the boundaries of a query object. `Query` must be a name previously returned from a call to `gl:genQueries/1`. If a query object with name `Id` does not yet exist it is created with the type determined by `Target`. `Target` must be one of `?GL_SAMPLES_PASSED`, `?GL_ANY_SAMPLES_PASSED`, `?GL_PRIMITIVES_GENERATED`, `?GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN`, or `?GL_TIME_ELAPSED`. The behavior of the query object depends on its type and is as follows.

External documentation.

# endQueryIndexed(Target, Index)

    -spec endQueryIndexed(Target :: enum(), Index :: i()) -> ok.

`gl:beginQueryIndexed/3` and `gl:endQueryIndexed/2` delimit the boundaries of a query object. `Query` must be a name previously returned from a call to `gl:genQueries/1`. If a query object with name `Id` does not yet exist it is created with the type determined by `Target`. `Target` must be one of `?GL_SAMPLES_PASSED`, `?GL_ANY_SAMPLES_PASSED`, `?GL_PRIMITIVES_GENERATED`, `?GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN`, or `?GL_TIME_ELAPSED`. The behavior of the query object depends on its type and is as follows.

External documentation.

# endTransformFeedback()

    -spec endTransformFeedback() -> ok.

Transform feedback mode captures the values of varying variables written by the vertex shader (or, if active, the geometry shader). Transform feedback is said to be active after a call to `gl:beginTransformFeedback/1` until a subsequent call to `gl:endTransformFeedback/0`. Transform feedback commands must be paired.

External documentation.

# evalCoord1d(U)

    -spec evalCoord1d(U :: f()) -> ok.

Equivalent to `evalCoord2fv/1`.

# evalCoord1dv/1

    -spec evalCoord1dv({U :: f()}) -> ok.

Equivalent to `evalCoord2fv/1`.

# evalCoord1f(U)

    -spec evalCoord1f(U :: f()) -> ok.

Equivalent to `evalCoord2fv/1`.

# evalCoord1fv/1

    -spec evalCoord1fv({U :: f()}) -> ok.

Equivalent to `evalCoord2fv/1`.

# evalCoord2d(U, V)

    -spec evalCoord2d(U :: f(), V :: f()) -> ok.

Equivalent to `evalCoord2fv/1`.

# evalCoord2dv/1

    -spec evalCoord2dv({U :: f(), V :: f()}) -> ok.

Equivalent to `evalCoord2fv/1`.

# evalCoord2f(U, V)

    -spec evalCoord2f(U :: f(), V :: f()) -> ok.

Equivalent to `evalCoord2fv/1`.

# evalCoord2fv/1

    -spec evalCoord2fv({U :: f(), V :: f()}) -> ok.

`gl:evalCoord1()` evaluates enabled one-dimensional maps at argument `U`. `gl:evalCoord2()` does the same for two-dimensional maps using two domain values, `U` and `V`. To define a map, call `glMap1` and `glMap2`; to enable and disable it, call `gl:enable/1` and `gl:disable/1`.

External documentation.

# evalMesh1(Mode, I1, I2)

    -spec evalMesh1(Mode :: enum(), I1 :: i(), I2 :: i()) -> ok.

Equivalent to `evalMesh2/5`.

# evalMesh2(Mode, I1, I2, J1, J2)

    -spec evalMesh2(Mode :: enum(), I1 :: i(), I2 :: i(), J1 :: i(), J2 :: i()) -> ok.

`gl:mapGrid()` and `gl:evalMesh()` are used in tandem to efficiently generate and evaluate a series of evenly-spaced map domain values. `gl:evalMesh()` steps through the integer domain of a one- or two-dimensional grid, whose range is the domain of the evaluation maps specified by `glMap1` and `glMap2`. `Mode` determines whether the resulting vertices are connected as points, lines, or filled polygons.

External documentation.

# evalPoint1(I)

    -spec evalPoint1(I :: i()) -> ok.

Equivalent to `evalPoint2/2`.

# evalPoint2(I, J)

    -spec evalPoint2(I :: i(), J :: i()) -> ok.

`gl:mapGrid()` and `gl:evalMesh()` are used in tandem to efficiently generate and evaluate a series of evenly spaced map domain values. `gl:evalPoint()` can be used to evaluate a single grid point in the same gridspace that is traversed by `gl:evalMesh()`. Calling `gl:evalPoint1/1` is equivalent to calling glEvalCoord1( i.ð u+u 1 ); where ð u=(u 2-u 1)/n

External documentation.

# feedbackBuffer(Size, Type, Buffer)

    -spec feedbackBuffer(Size :: i(), Type :: enum(), Buffer :: mem()) -> ok.

The `gl:feedbackBuffer/3` function controls feedback. Feedback, like selection, is a GL mode. The mode is selected by calling `gl:renderMode/1` with `?GL_FEEDBACK`. When the GL is in feedback mode, no pixels are produced by rasterization. Instead, information about primitives that would have been rasterized is fed back to the application using the GL.

External documentation.

# fenceSync(Condition, Flags)

    -spec fenceSync(Condition :: enum(), Flags :: i()) -> i().

`gl:fenceSync/2` creates a new fence sync object, inserts a fence command into the GL command stream and associates it with that sync object, and returns a non-zero name corresponding to the sync object.

External documentation.

# finish()

    -spec finish() -> ok.

`gl:finish/0` does not return until the effects of all previously called GL commands are complete. Such effects include all changes to GL state, all changes to connection state, and all changes to the frame buffer contents.

External documentation.

# flush()

    -spec flush() -> ok.

Different GL implementations buffer commands in several different locations, including network buffers and the graphics accelerator itself. `gl:flush/0` empties all of these buffers, causing all issued commands to be executed as quickly as they are accepted by the actual rendering engine. Though this execution may not be completed in any particular time period, it does complete in finite time.

External documentation.

# flushMappedBufferRange(Target, Offset, Length)

    -spec flushMappedBufferRange(Target :: enum(), Offset :: i(), Length :: i()) -> ok.

Equivalent to `flushMappedNamedBufferRange/3`.

# flushMappedNamedBufferRange(Buffer, Offset, Length)

    -spec flushMappedNamedBufferRange(Buffer :: i(), Offset :: i(), Length :: i()) -> ok.

`gl:flushMappedBufferRange/3` indicates that modifications have been made to a range of a mapped buffer object. The buffer object must previously have been mapped with the `?GL_MAP_FLUSH_EXPLICIT_BIT` flag.

External documentation.

# fogCoordd(Coord)

    -spec fogCoordd(Coord :: f()) -> ok.

Equivalent to `fogCoordfv/1`.

# fogCoorddv/1

    -spec fogCoorddv({Coord :: f()}) -> ok.

Equivalent to `fogCoordfv/1`.

# fogCoordf(Coord)

    -spec fogCoordf(Coord :: f()) -> ok.

Equivalent to `fogCoordfv/1`.

# fogCoordfv/1

    -spec fogCoordfv({Coord :: f()}) -> ok.

`gl:fogCoord()` specifies the fog coordinate that is associated with each vertex and the current raster position. The value specified is interpolated and used in computing the fog color (see `gl:fog()`).

External documentation.

# fogCoordPointer(Type, Stride, Pointer)

    -spec fogCoordPointer(Type :: enum(), Stride :: i(), Pointer :: offset() | mem()) -> ok.

`gl:fogCoordPointer/3` specifies the location and data format of an array of fog coordinates to use when rendering. `Type` specifies the data type of each fog coordinate, and `Stride` specifies the byte stride from one fog coordinate to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays.

External documentation.

# fogf(Pname, Param)

    -spec fogf(Pname :: enum(), Param :: f()) -> ok.

Equivalent to `fogiv/2`.

# fogfv(Pname, Params)

    -spec fogfv(Pname :: enum(), Params :: tuple()) -> ok.

Equivalent to `fogiv/2`.

# fogi(Pname, Param)

    -spec fogi(Pname :: enum(), Param :: i()) -> ok.

Equivalent to `fogiv/2`.

# fogiv(Pname, Params)

    -spec fogiv(Pname :: enum(), Params :: tuple()) -> ok.

Fog is initially disabled. While enabled, fog affects rasterized geometry, bitmaps, and pixel blocks, but not buffer clear operations. To enable and disable fog, call `gl:enable/1` and `gl:disable/1` with argument `?GL_FOG`.

External documentation.

# framebufferParameteri(Target, Pname, Param)

    -spec framebufferParameteri(Target :: enum(), Pname :: enum(), Param :: i()) -> ok.

`gl:framebufferParameteri/3` and `glNamedFramebufferParameteri` modify the value of the parameter named `Pname` in the specified framebuffer object. There are no modifiable parameters of the default draw and read framebuffer, so they are not valid targets of these commands.

External documentation.

# framebufferRenderbuffer(Target, Attachment, Renderbuffertarget, Renderbuffer)

    -spec framebufferRenderbuffer(Target, Attachment, Renderbuffertarget, Renderbuffer) -> ok
                                     when
                                         Target :: enum(),
                                         Attachment :: enum(),
                                         Renderbuffertarget :: enum(),
                                         Renderbuffer :: i().

`gl:framebufferRenderbuffer/4` and `glNamedFramebufferRenderbuffer` attaches a renderbuffer as one of the logical buffers of the specified framebuffer object. Renderbuffers cannot be attached to the default draw and read framebuffer, so they are not valid targets of these commands.

External documentation.

# framebufferTexture1D(Target, Attachment, Textarget, Texture, Level)

    -spec framebufferTexture1D(Target :: enum(),
                               Attachment :: enum(),
                               Textarget :: enum(),
                               Texture :: i(),
                               Level :: i()) ->
                                  ok.

Equivalent to `framebufferTextureLayer/5`.

# framebufferTexture2D(Target, Attachment, Textarget, Texture, Level)

    -spec framebufferTexture2D(Target :: enum(),
                               Attachment :: enum(),
                               Textarget :: enum(),
                               Texture :: i(),
                               Level :: i()) ->
                                  ok.

Equivalent to `framebufferTextureLayer/5`.

# framebufferTexture3D(Target, Attachment, Textarget, Texture, Level, Zoffset)

    -spec framebufferTexture3D(Target, Attachment, Textarget, Texture, Level, Zoffset) -> ok
                                  when
                                      Target :: enum(),
                                      Attachment :: enum(),
                                      Textarget :: enum(),
                                      Texture :: i(),
                                      Level :: i(),
                                      Zoffset :: i().

Equivalent to `framebufferTextureLayer/5`.

# framebufferTexture(Target, Attachment, Texture, Level)

    -spec framebufferTexture(Target :: enum(), Attachment :: enum(), Texture :: i(), Level :: i()) -> ok.

Equivalent to `framebufferTextureLayer/5`.

# framebufferTextureFaceARB(Target, Attachment, Texture, Level, Face)

    -spec framebufferTextureFaceARB(Target :: enum(),
                                    Attachment :: enum(),
                                    Texture :: i(),
                                    Level :: i(),
                                    Face :: enum()) ->
                                       ok.

Equivalent to `framebufferTextureLayer/5`.

# framebufferTextureLayer(Target, Attachment, Texture, Level, Layer)

    -spec framebufferTextureLayer(Target :: enum(),
                                  Attachment :: enum(),
                                  Texture :: i(),
                                  Level :: i(),
                                  Layer :: i()) ->
                                     ok.

These commands attach a selected mipmap level or image of a texture object as one of the logical buffers of the specified framebuffer object. Textures cannot be attached to the default draw and read framebuffer, so they are not valid targets of these commands.

External documentation.

# frontFace(Mode)

    -spec frontFace(Mode :: enum()) -> ok.

In a scene composed entirely of opaque closed surfaces, back-facing polygons are never visible. Eliminating these invisible polygons has the obvious benefit of speeding up the rendering of the image. To enable and disable elimination of back-facing polygons, call `gl:enable/1` and `gl:disable/1` with argument `?GL_CULL_FACE`.

External documentation.

# frustum(Left, Right, Bottom, Top, Near_val, Far_val)

    -spec frustum(Left :: f(), Right :: f(), Bottom :: f(), Top :: f(), Near_val :: f(), Far_val :: f()) ->
                     ok.

`gl:frustum/6` describes a perspective matrix that produces a perspective projection. The current matrix (see `gl:matrixMode/1`) is multiplied by this matrix and the result replaces the current matrix, as if `gl:multMatrix()` were called with the following matrix as its argument:

External documentation.

# genBuffers(N)

    -spec genBuffers(N :: i()) -> [i()].

`gl:genBuffers/1` returns `N` buffer object names in `Buffers`. There is no guarantee that the names form a contiguous set of integers; however, it is guaranteed that none of the returned names was in use immediately before the call to `gl:genBuffers/1`.

External documentation.

# generateMipmap(Target)

    -spec generateMipmap(Target :: enum()) -> ok.

Equivalent to `generateTextureMipmap/1`.

# generateTextureMipmap(Texture)

    -spec generateTextureMipmap(Texture :: i()) -> ok.

`gl:generateMipmap/1` and `gl:generateTextureMipmap/1` generates mipmaps for the specified texture object. For `gl:generateMipmap/1`, the texture object that is bound to `Target`. For `gl:generateTextureMipmap/1`, `Texture` is the name of the texture object.

External documentation.

# genFramebuffers(N)

    -spec genFramebuffers(N :: i()) -> [i()].

`gl:genFramebuffers/1` returns `N` framebuffer object names in `Ids`. There is no guarantee that the names form a contiguous set of integers; however, it is guaranteed that none of the returned names was in use immediately before the call to `gl:genFramebuffers/1`.

External documentation.

# genLists(Range)

    -spec genLists(Range :: i()) -> i().

`gl:genLists/1` has one argument, `Range`. It returns an integer `n` such that `Range` contiguous empty display lists, named n, n+1, ..., n+range-1, are created. If `Range` is 0, if there is no group of `Range` contiguous names available, or if any error is generated, no display lists are generated, and 0 is returned.

External documentation.

# genProgramPipelines(N)

    -spec genProgramPipelines(N :: i()) -> [i()].

`gl:genProgramPipelines/1` returns `N` previously unused program pipeline object names in `Pipelines`. These names are marked as used, for the purposes of `gl:genProgramPipelines/1` only, but they acquire program pipeline state only when they are first bound.

External documentation.

# genQueries(N)

    -spec genQueries(N :: i()) -> [i()].

`gl:genQueries/1` returns `N` query object names in `Ids`. There is no guarantee that the names form a contiguous set of integers; however, it is guaranteed that none of the returned names was in use immediately before the call to `gl:genQueries/1`.

External documentation.

# genRenderbuffers(N)

    -spec genRenderbuffers(N :: i()) -> [i()].

`gl:genRenderbuffers/1` returns `N` renderbuffer object names in `Renderbuffers`. There is no guarantee that the names form a contiguous set of integers; however, it is guaranteed that none of the returned names was in use immediately before the call to `gl:genRenderbuffers/1`.

External documentation.

# genSamplers(Count)

    -spec genSamplers(Count :: i()) -> [i()].

`gl:genSamplers/1` returns `N` sampler object names in `Samplers`. There is no guarantee that the names form a contiguous set of integers; however, it is guaranteed that none of the returned names was in use immediately before the call to `gl:genSamplers/1`.

External documentation.

# genTextures(N)

    -spec genTextures(N :: i()) -> [i()].

`gl:genTextures/1` returns `N` texture names in `Textures`. There is no guarantee that the names form a contiguous set of integers; however, it is guaranteed that none of the returned names was in use immediately before the call to `gl:genTextures/1`.

External documentation.

# genTransformFeedbacks(N)

    -spec genTransformFeedbacks(N :: i()) -> [i()].

`gl:genTransformFeedbacks/1` returns `N` previously unused transform feedback object names in `Ids`. These names are marked as used, for the purposes of `gl:genTransformFeedbacks/1` only, but they acquire transform feedback state only when they are first bound.

External documentation.

# genVertexArrays(N)

    -spec genVertexArrays(N :: i()) -> [i()].

`gl:genVertexArrays/1` returns `N` vertex array object names in `Arrays`. There is no guarantee that the names form a contiguous set of integers; however, it is guaranteed that none of the returned names was in use immediately before the call to `gl:genVertexArrays/1`.

External documentation.

# getActiveAttrib(Program, Index, BufSize)

    -spec getActiveAttrib(Program :: i(), Index :: i(), BufSize :: i()) ->
                             {Size :: i(), Type :: enum(), Name :: string()}.

`gl:getActiveAttrib/3` returns information about an active attribute variable in the program object specified by `Program`. The number of active attributes can be obtained by calling `gl:getProgram()` with the value `?GL_ACTIVE_ATTRIBUTES`. A value of 0 for `Index` selects the first active attribute variable. Permissible values for `Index` range from zero to the number of active attribute variables minus one.

External documentation.

# getActiveSubroutineName(Program, Shadertype, Index, Bufsize)

    -spec getActiveSubroutineName(Program :: i(), Shadertype :: enum(), Index :: i(), Bufsize :: i()) ->
                                     string().

`gl:getActiveSubroutineName/4` queries the name of an active shader subroutine uniform from the program object given in `Program`. `Index` specifies the index of the shader subroutine uniform within the shader stage given by `Stage`, and must between zero and the value of `?GL_ACTIVE_SUBROUTINES` minus one for the shader stage.

External documentation.

# getActiveSubroutineUniformName(Program, Shadertype, Index, Bufsize)

    -spec getActiveSubroutineUniformName(Program :: i(), Shadertype :: enum(), Index :: i(), Bufsize :: i()) ->
                                            string().

`gl:getActiveSubroutineUniformName/4` retrieves the name of an active shader subroutine uniform. `Program` contains the name of the program containing the uniform. `Shadertype` specifies the stage for which the uniform location, given by `Index`, is valid. `Index` must be between zero and the value of `?GL_ACTIVE_SUBROUTINE_UNIFORMS` minus one for the shader stage.

External documentation.

# getActiveUniform(Program, Index, BufSize)

    -spec getActiveUniform(Program :: i(), Index :: i(), BufSize :: i()) ->
                              {Size :: i(), Type :: enum(), Name :: string()}.

`gl:getActiveUniform/3` returns information about an active uniform variable in the program object specified by `Program`. The number of active uniform variables can be obtained by calling `gl:getProgram()` with the value `?GL_ACTIVE_UNIFORMS`. A value of 0 for `Index` selects the first active uniform variable. Permissible values for `Index` range from zero to the number of active uniform variables minus one.

External documentation.

# getActiveUniformBlockiv(Program, UniformBlockIndex, Pname, Params)

    -spec getActiveUniformBlockiv(Program :: i(),
                                  UniformBlockIndex :: i(),
                                  Pname :: enum(),
                                  Params :: mem()) ->
                                     ok.

`gl:getActiveUniformBlockiv/4` retrieves information about an active uniform block within `Program`.

External documentation.

# getActiveUniformBlockName(Program, UniformBlockIndex, BufSize)

    -spec getActiveUniformBlockName(Program :: i(), UniformBlockIndex :: i(), BufSize :: i()) -> string().

`gl:getActiveUniformBlockName/3` retrieves the name of the active uniform block at `UniformBlockIndex` within `Program`.

External documentation.

# getActiveUniformName(Program, UniformIndex, BufSize)

    -spec getActiveUniformName(Program :: i(), UniformIndex :: i(), BufSize :: i()) -> string().

`gl:getActiveUniformName/3` returns the name of the active uniform at `UniformIndex` within `Program`. If `UniformName` is not NULL, up to `BufSize` characters (including a nul-terminator) will be written into the array whose address is specified by `UniformName`. If `Length` is not NULL, the number of characters that were (or would have been) written into `UniformName` (not including the nul-terminator) will be placed in the variable whose address is specified in `Length`. If `Length` is NULL, no length is returned. The length of the longest uniform name in `Program` is given by the value of `?GL_ACTIVE_UNIFORM_MAX_LENGTH`, which can be queried with `gl:getProgram()`.

External documentation.

# getActiveUniformsiv(Program, UniformIndices, Pname)

    -spec getActiveUniformsiv(Program :: i(), UniformIndices :: [i()], Pname :: enum()) -> [i()].

`gl:getActiveUniformsiv/3` queries the value of the parameter named `Pname` for each of the uniforms within `Program` whose indices are specified in the array of `UniformCount` unsigned integers `UniformIndices`. Upon success, the value of the parameter for each uniform is written into the corresponding entry in the array whose address is given in `Params`. If an error is generated, nothing is written into `Params`.

External documentation.

# getAttachedShaders(Program, MaxCount)

    -spec getAttachedShaders(Program :: i(), MaxCount :: i()) -> [i()].

`gl:getAttachedShaders/2` returns the names of the shader objects attached to `Program`. The names of shader objects that are attached to `Program` will be returned in `Shaders.` The actual number of shader names written into `Shaders` is returned in `Count.` If no shader objects are attached to `Program`, `Count` is set to 0. The maximum number of shader names that may be returned in `Shaders` is specified by `MaxCount`.

External documentation.

# getAttribLocation(Program, Name)

    -spec getAttribLocation(Program :: i(), Name :: string()) -> i().

`gl:getAttribLocation/2` queries the previously linked program object specified by `Program` for the attribute variable specified by `Name` and returns the index of the generic vertex attribute that is bound to that attribute variable. If `Name` is a matrix attribute variable, the index of the first column of the matrix is returned. If the named attribute variable is not an active attribute in the specified program object or if `Name` starts with the reserved prefix "gl_", a value of -1 is returned.

External documentation.

# getBooleani_v(Target, Index)

    -spec getBooleani_v(Target :: enum(), Index :: i()) -> [0 | 1].

Equivalent to `getIntegerv/1`.

# getBooleanv(Pname)

    -spec getBooleanv(Pname :: enum()) -> [0 | 1].

Equivalent to `getIntegerv/1`.

# getBufferParameteri64v(Target, Pname)

    -spec getBufferParameteri64v(Target :: enum(), Pname :: enum()) -> [i()].

Equivalent to `getBufferParameterivARB/2`.

# getBufferParameteriv(Target, Pname)

    -spec getBufferParameteriv(Target :: enum(), Pname :: enum()) -> i().

`gl:getBufferParameteriv/2` returns in `Data` a selected parameter of the buffer object specified by `Target`.

External documentation.

# getBufferParameterivARB(Target, Pname)

    -spec getBufferParameterivARB(Target :: enum(), Pname :: enum()) -> [i()].

These functions return in `Data` a selected parameter of the specified buffer object.

External documentation.

# getBufferSubData(Target, Offset, Size, Data)

    -spec getBufferSubData(Target :: enum(), Offset :: i(), Size :: i(), Data :: mem()) -> ok.

`gl:getBufferSubData/4` and `glGetNamedBufferSubData` return some or all of the data contents of the data store of the specified buffer object. Data starting at byte offset `Offset` and extending for `Size` bytes is copied from the buffer object's data store to the memory pointed to by `Data`. An error is thrown if the buffer object is currently mapped, or if `Offset` and `Size` together define a range beyond the bounds of the buffer object's data store.

External documentation.

# getClipPlane(Plane)

    -spec getClipPlane(Plane :: enum()) -> {f(), f(), f(), f()}.

`gl:getClipPlane/1` returns in `Equation` the four coefficients of the plane equation for `Plane`.

External documentation.

# getColorTable(Target, Format, Type, Table)

    -spec getColorTable(Target :: enum(), Format :: enum(), Type :: enum(), Table :: mem()) -> ok.

`gl:getColorTable/4` returns in `Table` the contents of the color table specified by `Target`. No pixel transfer operations are performed, but pixel storage modes that are applicable to `gl:readPixels/7` are performed.

External documentation.

# getColorTableParameterfv(Target, Pname)

    -spec getColorTableParameterfv(Target :: enum(), Pname :: enum()) -> {f(), f(), f(), f()}.

Equivalent to `getColorTableParameteriv/2`.

# getColorTableParameteriv(Target, Pname)

    -spec getColorTableParameteriv(Target :: enum(), Pname :: enum()) -> {i(), i(), i(), i()}.

Returns parameters specific to color table `Target`.

External documentation.

# getCompressedTexImage(Target, Lod, Img)

    -spec getCompressedTexImage(Target :: enum(), Lod :: i(), Img :: mem()) -> ok.

`gl:getCompressedTexImage/3` and `glGetnCompressedTexImage` return the compressed texture image associated with `Target` and `Lod` into `Pixels`. `glGetCompressedTextureImage` serves the same purpose, but instead of taking a texture target, it takes the ID of the texture object. `Pixels` should be an array of `BufSize` bytes for `glGetnCompresedTexImage` and `glGetCompressedTextureImage` functions, and of `?GL_TEXTURE_COMPRESSED_IMAGE_SIZE` bytes in case of `gl:getCompressedTexImage/3`. If the actual data takes less space than `BufSize`, the remaining bytes will not be touched. `Target` specifies the texture target, to which the texture the data the function should extract the data from is bound to. `Lod` specifies the level-of-detail number of the desired image.

External documentation.

# getConvolutionFilter(Target, Format, Type, Image)

    -spec getConvolutionFilter(Target :: enum(), Format :: enum(), Type :: enum(), Image :: mem()) -> ok.

`gl:getConvolutionFilter/4` returns the current 1D or 2D convolution filter kernel as an image. The one- or two-dimensional image is placed in `Image` according to the specifications in `Format` and `Type`. No pixel transfer operations are performed on this image, but the relevant pixel storage modes are applied.

External documentation.

# getConvolutionParameterfv(Target, Pname)

    -spec getConvolutionParameterfv(Target :: enum(), Pname :: enum()) -> {f(), f(), f(), f()}.

Equivalent to `getConvolutionParameteriv/2`.

# getConvolutionParameteriv(Target, Pname)

    -spec getConvolutionParameteriv(Target :: enum(), Pname :: enum()) -> {i(), i(), i(), i()}.

`gl:getConvolutionParameter()` retrieves convolution parameters. `Target` determines which convolution filter is queried. `Pname` determines which parameter is returned:

External documentation.

# getDebugMessageLog(Count, BufSize)

    -spec getDebugMessageLog(Count :: i(), BufSize :: i()) ->
                                {i(),
                                 Sources :: [enum()],
                                 Types :: [enum()],
                                 Ids :: [i()],
                                 Severities :: [enum()],
                                 MessageLog :: [string()]}.

`gl:getDebugMessageLog/2` retrieves messages from the debug message log. A maximum of `Count` messages are retrieved from the log. If `Sources` is not NULL then the source of each message is written into up to `Count` elements of the array. If `Types` is not NULL then the type of each message is written into up to `Count` elements of the array. If `Id` is not NULL then the identifier of each message is written into up to `Count` elements of the array. If `Severities` is not NULL then the severity of each message is written into up to `Count` elements of the array. If `Lengths` is not NULL then the length of each message is written into up to `Count` elements of the array.

External documentation.

# getDoublei_v(Target, Index)

    -spec getDoublei_v(Target :: enum(), Index :: i()) -> [f()].

Equivalent to `getIntegerv/1`.

# getDoublev(Pname)

    -spec getDoublev(Pname :: enum()) -> [f()].

Equivalent to `getIntegerv/1`.

# getError()

    -spec getError() -> enum().

`gl:getError/0` returns the value of the error flag. Each detectable error is assigned a numeric code and symbolic name. When an error occurs, the error flag is set to the appropriate error code value. No other errors are recorded until `gl:getError/0` is called, the error code is returned, and the flag is reset to `?GL_NO_ERROR`. If a call to `gl:getError/0` returns `?GL_NO_ERROR`, there has been no detectable error since the last call to `gl:getError/0`, or since the GL was initialized.

External documentation.

# getFloati_v(Target, Index)

    -spec getFloati_v(Target :: enum(), Index :: i()) -> [f()].

Equivalent to `getIntegerv/1`.

# getFloatv(Pname)

    -spec getFloatv(Pname :: enum()) -> [f()].

Equivalent to `getIntegerv/1`.

# getFragDataIndex(Program, Name)

    -spec getFragDataIndex(Program :: i(), Name :: string()) -> i().

`gl:getFragDataIndex/2` returns the index of the fragment color to which the variable `Name` was bound when the program object `Program` was last linked. If `Name` is not a varying out variable of `Program`, or if an error occurs, -1 will be returned.

External documentation.

# getFragDataLocation(Program, Name)

    -spec getFragDataLocation(Program :: i(), Name :: string()) -> i().

`gl:getFragDataLocation/2` retrieves the assigned color number binding for the user-defined varying out variable `Name` for program `Program`. `Program` must have previously been linked. `Name` must be a null-terminated string. If `Name` is not the name of an active user-defined varying out fragment shader variable within `Program`, -1 will be returned.

External documentation.

# getFramebufferAttachmentParameteriv(Target, Attachment, Pname)

    -spec getFramebufferAttachmentParameteriv(Target :: enum(), Attachment :: enum(), Pname :: enum()) ->
                                                 i().

`gl:getFramebufferAttachmentParameteriv/3` and `glGetNamedFramebufferAttachmentParameteriv` return parameters of attachments of a specified framebuffer object.

External documentation.

# getFramebufferParameteriv(Target, Pname)

    -spec getFramebufferParameteriv(Target :: enum(), Pname :: enum()) -> i().

`gl:getFramebufferParameteriv/2` and `glGetNamedFramebufferParameteriv` query parameters of a specified framebuffer object.

External documentation.

# getGraphicsResetStatus()

    -spec getGraphicsResetStatus() -> enum().

Certain events can result in a reset of the GL context. Such a reset causes all context state to be lost and requires the application to recreate all objects in the affected context.

External documentation.

# getHistogram(Target, Reset, Format, Type, Values)

    -spec getHistogram(Target :: enum(), Reset :: 0 | 1, Format :: enum(), Type :: enum(), Values :: mem()) ->
                          ok.

`gl:getHistogram/5` returns the current histogram table as a one-dimensional image with the same width as the histogram. No pixel transfer operations are performed on this image, but pixel storage modes that are applicable to 1D images are honored.

External documentation.

# getHistogramParameterfv(Target, Pname)

    -spec getHistogramParameterfv(Target :: enum(), Pname :: enum()) -> {f()}.

Equivalent to `getHistogramParameteriv/2`.

# getHistogramParameteriv(Target, Pname)

    -spec getHistogramParameteriv(Target :: enum(), Pname :: enum()) -> {i()}.

`gl:getHistogramParameter()` is used to query parameter values for the current histogram or for a proxy. The histogram state information may be queried by calling `gl:getHistogramParameter()` with a `Target` of `?GL_HISTOGRAM` (to obtain information for the current histogram table) or `?GL_PROXY_HISTOGRAM` (to obtain information from the most recent proxy request) and one of the following values for the `Pname` argument:

External documentation.

# getInteger64i_v(Target, Index)

    -spec getInteger64i_v(Target :: enum(), Index :: i()) -> [i()].

Equivalent to `getIntegerv/1`.

# getInteger64v(Pname)

    -spec getInteger64v(Pname :: enum()) -> [i()].

Equivalent to `getIntegerv/1`.

# getIntegeri_v(Target, Index)

    -spec getIntegeri_v(Target :: enum(), Index :: i()) -> [i()].

Equivalent to `getIntegerv/1`.

# getIntegerv(Pname)

    -spec getIntegerv(Pname :: enum()) -> [i()].

These commands return values for simple state variables in GL. `Pname` is a symbolic constant indicating the state variable to be returned, and `Data` is a pointer to an array of the indicated type in which to place the returned data.

External documentation.

# getInternalformati64v(Target, Internalformat, Pname, BufSize)

    -spec getInternalformati64v(Target :: enum(), Internalformat :: enum(), Pname :: enum(), BufSize :: i()) ->
                                   [i()].

Equivalent to `getInternalformativ/4`.

# getInternalformativ(Target, Internalformat, Pname, BufSize)

    -spec getInternalformativ(Target :: enum(), Internalformat :: enum(), Pname :: enum(), BufSize :: i()) ->
                                 [i()].

No documentation available.

# getLightfv(Light, Pname)

    -spec getLightfv(Light :: enum(), Pname :: enum()) -> {f(), f(), f(), f()}.

Equivalent to `getLightiv/2`.

# getLightiv(Light, Pname)

    -spec getLightiv(Light :: enum(), Pname :: enum()) -> {i(), i(), i(), i()}.

`gl:getLight()` returns in `Params` the value or values of a light source parameter. `Light` names the light and is a symbolic name of the form `?GL_LIGHT` i where i ranges from 0 to the value of `?GL_MAX_LIGHTS` - 1. `?GL_MAX_LIGHTS` is an implementation dependent constant that is greater than or equal to eight. `Pname` specifies one of ten light source parameters, again by symbolic name.

External documentation.

# getMapdv(Target, Query, V)

    -spec getMapdv(Target :: enum(), Query :: enum(), V :: mem()) -> ok.

Equivalent to `getMapiv/3`.

# getMapfv(Target, Query, V)

    -spec getMapfv(Target :: enum(), Query :: enum(), V :: mem()) -> ok.

Equivalent to `getMapiv/3`.

# getMapiv(Target, Query, V)

    -spec getMapiv(Target :: enum(), Query :: enum(), V :: mem()) -> ok.

`glMap1` and `glMap2` define evaluators. `gl:getMap()` returns evaluator parameters. `Target` chooses a map, `Query` selects a specific parameter, and `V` points to storage where the values will be returned.

External documentation.

# getMaterialfv(Face, Pname)

    -spec getMaterialfv(Face :: enum(), Pname :: enum()) -> {f(), f(), f(), f()}.

Equivalent to `getMaterialiv/2`.

# getMaterialiv(Face, Pname)

    -spec getMaterialiv(Face :: enum(), Pname :: enum()) -> {i(), i(), i(), i()}.

`gl:getMaterial()` returns in `Params` the value or values of parameter `Pname` of material `Face`. Six parameters are defined:

External documentation.

# getMinmax(Target, Reset, Format, Types, Values)

    -spec getMinmax(Target :: enum(), Reset :: 0 | 1, Format :: enum(), Types :: enum(), Values :: mem()) ->
                       ok.

`gl:getMinmax/5` returns the accumulated minimum and maximum pixel values (computed on a per-component basis) in a one-dimensional image of width 2. The first set of return values are the minima, and the second set of return values are the maxima. The format of the return values is determined by `Format`, and their type is determined by `Types`.

External documentation.

# getMinmaxParameterfv(Target, Pname)

    -spec getMinmaxParameterfv(Target :: enum(), Pname :: enum()) -> {f()}.

Equivalent to `getMinmaxParameteriv/2`.

# getMinmaxParameteriv(Target, Pname)

    -spec getMinmaxParameteriv(Target :: enum(), Pname :: enum()) -> {i()}.

`gl:getMinmaxParameter()` retrieves parameters for the current minmax table by setting `Pname` to one of the following values:

External documentation.

# getMultisamplefv(Pname, Index)

    -spec getMultisamplefv(Pname :: enum(), Index :: i()) -> {f(), f()}.

`gl:getMultisamplefv/2` queries the location of a given sample. `Pname` specifies the sample parameter to retrieve and must be `?GL_SAMPLE_POSITION`. `Index` corresponds to the sample for which the location should be returned. The sample location is returned as two floating-point values in `Val[0]` and `Val[1]`, each between 0 and 1, corresponding to the `X` and `Y` locations respectively in the GL pixel space of that sample. (0.5, 0.5) this corresponds to the pixel center. `Index` must be between zero and the value of `?GL_SAMPLES` minus one.

External documentation.

# getPixelMapfv(Map, Values)

    -spec getPixelMapfv(Map :: enum(), Values :: mem()) -> ok.

Equivalent to `getPixelMapusv/2`.

# getPixelMapuiv(Map, Values)

    -spec getPixelMapuiv(Map :: enum(), Values :: mem()) -> ok.

Equivalent to `getPixelMapusv/2`.

# getPixelMapusv(Map, Values)

    -spec getPixelMapusv(Map :: enum(), Values :: mem()) -> ok.

See the `gl:pixelMap()` reference page for a description of the acceptable values for the `Map` parameter. `gl:getPixelMap()` returns in `Data` the contents of the pixel map specified in `Map`. Pixel maps are used during the execution of `gl:readPixels/7`, `gl:drawPixels/5`, `gl:copyPixels/5`, `gl:texImage1D/8`, `gl:texImage2D/9`, `gl:texImage3D/10`, `gl:texSubImage1D/7`, `gl:texSubImage2D/9`, `gl:texSubImage3D/11`, `gl:copyTexImage1D/7`, `gl:copyTexImage2D/8`, `gl:copyTexSubImage1D/6`, `gl:copyTexSubImage2D/8`, and `gl:copyTexSubImage3D/9`. to map color indices, stencil indices, color components, and depth components to other values.

External documentation.

# getPolygonStipple()

    -spec getPolygonStipple() -> binary().

`gl:getPolygonStipple/0` returns to `Pattern` a 32×32 polygon stipple pattern. The pattern is packed into memory as if `gl:readPixels/7` with both `height` and `width` of 32, `type` of `?GL_BITMAP`, and `format` of `?GL_COLOR_INDEX` were called, and the stipple pattern were stored in an internal 32×32 color index buffer. Unlike `gl:readPixels/7`, however, pixel transfer operations (shift, offset, pixel map) are not applied to the returned stipple image.

External documentation.

# getProgramBinary(Program, BufSize)

    -spec getProgramBinary(Program :: i(), BufSize :: i()) -> {BinaryFormat :: enum(), Binary :: binary()}.

`gl:getProgramBinary/2` returns a binary representation of the compiled and linked executable for `Program` into the array of bytes whose address is specified in `Binary`. The maximum number of bytes that may be written into `Binary` is specified by `BufSize`. If the program binary is greater in size than `BufSize` bytes, then an error is generated, otherwise the actual number of bytes written into `Binary` is returned in the variable whose address is given by `Length`. If `Length` is `?NULL`, then no length is returned.

External documentation.

# getProgramInfoLog(Program, BufSize)

    -spec getProgramInfoLog(Program :: i(), BufSize :: i()) -> string().

`gl:getProgramInfoLog/2` returns the information log for the specified program object. The information log for a program object is modified when the program object is linked or validated. The string that is returned will be null terminated.

External documentation.

# getProgramInterfaceiv(Program, ProgramInterface, Pname)

    -spec getProgramInterfaceiv(Program :: i(), ProgramInterface :: enum(), Pname :: enum()) -> i().

`gl:getProgramInterfaceiv/3` queries the property of the interface identifed by `ProgramInterface` in `Program`, the property name of which is given by `Pname`.

External documentation.

# getProgramiv(Program, Pname)

    -spec getProgramiv(Program :: i(), Pname :: enum()) -> i().

`gl:getProgram()` returns in `Params` the value of a parameter for a specific program object. The following parameters are defined:

External documentation.

# getProgramPipelineInfoLog(Pipeline, BufSize)

    -spec getProgramPipelineInfoLog(Pipeline :: i(), BufSize :: i()) -> string().

`gl:getProgramPipelineInfoLog/2` retrieves the info log for the program pipeline object `Pipeline`. The info log, including its null terminator, is written into the array of characters whose address is given by `InfoLog`. The maximum number of characters that may be written into `InfoLog` is given by `BufSize`, and the actual number of characters written into `InfoLog` is returned in the integer whose address is given by `Length`. If `Length` is `?NULL`, no length is returned.

External documentation.

# getProgramPipelineiv(Pipeline, Pname)

    -spec getProgramPipelineiv(Pipeline :: i(), Pname :: enum()) -> i().

`gl:getProgramPipelineiv/2` retrieves the value of a property of the program pipeline object `Pipeline`. `Pname` specifies the name of the parameter whose value to retrieve. The value of the parameter is written to the variable whose address is given by `Params`.

External documentation.

# getProgramResourceIndex(Program, ProgramInterface, Name)

    -spec getProgramResourceIndex(Program :: i(), ProgramInterface :: enum(), Name :: string()) -> i().

`gl:getProgramResourceIndex/3` returns the unsigned integer index assigned to a resource named `Name` in the interface type `ProgramInterface` of program object `Program`.

External documentation.

# getProgramResourceLocation(Program, ProgramInterface, Name)

    -spec getProgramResourceLocation(Program :: i(), ProgramInterface :: enum(), Name :: string()) -> i().

`gl:getProgramResourceLocation/3` returns the location assigned to the variable named `Name` in interface `ProgramInterface` of program object `Program`. `Program` must be the name of a program that has been linked successfully. `ProgramInterface` must be one of `?GL_UNIFORM`, `?GL_PROGRAM_INPUT`, `?GL_PROGRAM_OUTPUT`, `?GL_VERTEX_SUBROUTINE_UNIFORM`, `?GL_TESS_CONTROL_SUBROUTINE_UNIFORM`, `?GL_TESS_EVALUATION_SUBROUTINE_UNIFORM`, `?GL_GEOMETRY_SUBROUTINE_UNIFORM`, `?GL_FRAGMENT_SUBROUTINE_UNIFORM`, `?GL_COMPUTE_SUBROUTINE_UNIFORM`, or `?GL_TRANSFORM_FEEDBACK_BUFFER`.

External documentation.

# getProgramResourceLocationIndex(Program, ProgramInterface, Name)

    -spec getProgramResourceLocationIndex(Program :: i(), ProgramInterface :: enum(), Name :: string()) ->
                                             i().

`gl:getProgramResourceLocationIndex/3` returns the fragment color index assigned to the variable named `Name` in interface `ProgramInterface` of program object `Program`. `Program` must be the name of a program that has been linked successfully. `ProgramInterface` must be `?GL_PROGRAM_OUTPUT`.

External documentation.

# getProgramResourceName(Program, ProgramInterface, Index, BufSize)

    -spec getProgramResourceName(Program :: i(), ProgramInterface :: enum(), Index :: i(), BufSize :: i()) ->
                                    string().

`gl:getProgramResourceName/4` retrieves the name string assigned to the single active resource with an index of `Index` in the interface `ProgramInterface` of program object `Program`. `Index` must be less than the number of entries in the active resource list for `ProgramInterface`.

External documentation.

# getProgramStageiv(Program, Shadertype, Pname)

    -spec getProgramStageiv(Program :: i(), Shadertype :: enum(), Pname :: enum()) -> i().

`gl:getProgramStage()` queries a parameter of a shader stage attached to a program object. `Program` contains the name of the program to which the shader is attached. `Shadertype` specifies the stage from which to query the parameter. `Pname` specifies which parameter should be queried. The value or values of the parameter to be queried is returned in the variable whose address is given in `Values`.

External documentation.

# getQueryBufferObjecti64v(Id, Buffer, Pname, Offset)

    -spec getQueryBufferObjecti64v(Id :: i(), Buffer :: i(), Pname :: enum(), Offset :: i()) -> ok.

Equivalent to `getQueryObjectuiv/2`.

# getQueryBufferObjectiv(Id, Buffer, Pname, Offset)

    -spec getQueryBufferObjectiv(Id :: i(), Buffer :: i(), Pname :: enum(), Offset :: i()) -> ok.

Equivalent to `getQueryObjectuiv/2`.

# getQueryBufferObjectui64v(Id, Buffer, Pname, Offset)

    -spec getQueryBufferObjectui64v(Id :: i(), Buffer :: i(), Pname :: enum(), Offset :: i()) -> ok.

Equivalent to `getQueryObjectuiv/2`.

# getQueryBufferObjectuiv(Id, Buffer, Pname, Offset)

    -spec getQueryBufferObjectuiv(Id :: i(), Buffer :: i(), Pname :: enum(), Offset :: i()) -> ok.

Equivalent to `getQueryObjectuiv/2`.

# getQueryIndexediv(Target, Index, Pname)

    -spec getQueryIndexediv(Target :: enum(), Index :: i(), Pname :: enum()) -> i().

`gl:getQueryIndexediv/3` returns in `Params` a selected parameter of the indexed query object target specified by `Target` and `Index`. `Index` specifies the index of the query object target and must be between zero and a target-specific maxiumum.

External documentation.

# getQueryiv(Target, Pname)

    -spec getQueryiv(Target :: enum(), Pname :: enum()) -> i().

`gl:getQueryiv/2` returns in `Params` a selected parameter of the query object target specified by `Target`.

External documentation.

# getQueryObjecti64v(Id, Pname)

    -spec getQueryObjecti64v(Id :: i(), Pname :: enum()) -> i().

Equivalent to `getQueryObjectuiv/2`.

# getQueryObjectiv(Id, Pname)

    -spec getQueryObjectiv(Id :: i(), Pname :: enum()) -> i().

Equivalent to `getQueryObjectuiv/2`.

# getQueryObjectui64v(Id, Pname)

    -spec getQueryObjectui64v(Id :: i(), Pname :: enum()) -> i().

Equivalent to `getQueryObjectuiv/2`.

# getQueryObjectuiv(Id, Pname)

    -spec getQueryObjectuiv(Id :: i(), Pname :: enum()) -> i().

These commands return a selected parameter of the query object specified by `Id`. `gl:getQueryObject()` returns in `Params` a selected parameter of the query object specified by `Id`. `gl:getQueryBufferObject()` returns in `Buffer` a selected parameter of the query object specified by `Id`, by writing it to `Buffer`'s data store at the byte offset specified by `Offset`.

External documentation.

# getRenderbufferParameteriv(Target, Pname)

    -spec getRenderbufferParameteriv(Target :: enum(), Pname :: enum()) -> i().

`gl:getRenderbufferParameteriv/2` and `glGetNamedRenderbufferParameteriv` query parameters of a specified renderbuffer object.

External documentation.

# getSamplerParameterfv(Sampler, Pname)

    -spec getSamplerParameterfv(Sampler :: i(), Pname :: enum()) -> [f()].

Equivalent to `getSamplerParameteriv/2`.

# getSamplerParameterIiv(Sampler, Pname)

    -spec getSamplerParameterIiv(Sampler :: i(), Pname :: enum()) -> [i()].

Equivalent to `getSamplerParameteriv/2`.

# getSamplerParameterIuiv(Sampler, Pname)

    -spec getSamplerParameterIuiv(Sampler :: i(), Pname :: enum()) -> [i()].

Equivalent to `getSamplerParameteriv/2`.

# getSamplerParameteriv(Sampler, Pname)

    -spec getSamplerParameteriv(Sampler :: i(), Pname :: enum()) -> [i()].

`gl:getSamplerParameter()` returns in `Params` the value or values of the sampler parameter specified as `Pname`. `Sampler` defines the target sampler, and must be the name of an existing sampler object, returned from a previous call to `gl:genSamplers/1`. `Pname` accepts the same symbols as `gl:samplerParameter()`, with the same interpretations:

External documentation.

# getShaderInfoLog(Shader, BufSize)

    -spec getShaderInfoLog(Shader :: i(), BufSize :: i()) -> string().

`gl:getShaderInfoLog/2` returns the information log for the specified shader object. The information log for a shader object is modified when the shader is compiled. The string that is returned will be null terminated.

External documentation.

# getShaderiv(Shader, Pname)

    -spec getShaderiv(Shader :: i(), Pname :: enum()) -> i().

`gl:getShader()` returns in `Params` the value of a parameter for a specific shader object. The following parameters are defined:

External documentation.

# getShaderPrecisionFormat(Shadertype, Precisiontype)

    -spec getShaderPrecisionFormat(Shadertype :: enum(), Precisiontype :: enum()) ->
                                      {Range :: {i(), i()}, Precision :: i()}.

`gl:getShaderPrecisionFormat/2` retrieves the numeric range and precision for the implementation's representation of quantities in different numeric formats in specified shader type. `ShaderType` specifies the type of shader for which the numeric precision and range is to be retrieved and must be one of `?GL_VERTEX_SHADER` or `?GL_FRAGMENT_SHADER`. `PrecisionType` specifies the numeric format to query and must be one of `?GL_LOW_FLOAT`, `?GL_MEDIUM_FLOAT``?GL_HIGH_FLOAT`, `?GL_LOW_INT`, `?GL_MEDIUM_INT`, or `?GL_HIGH_INT`.

External documentation.

# getShaderSource(Shader, BufSize)

    -spec getShaderSource(Shader :: i(), BufSize :: i()) -> string().

`gl:getShaderSource/2` returns the concatenation of the source code strings from the shader object specified by `Shader`. The source code strings for a shader object are the result of a previous call to `gl:shaderSource/2`. The string returned by the function will be null terminated.

External documentation.

# getString(Name)

    -spec getString(Name :: enum()) -> string().

Equivalent to `getStringi/2`.

# getStringi(Name, Index)

    -spec getStringi(Name :: enum(), Index :: i()) -> string().

`gl:getString/1` returns a pointer to a static string describing some aspect of the current GL connection. `Name` can be one of the following:

External documentation.

# getSubroutineIndex(Program, Shadertype, Name)

    -spec getSubroutineIndex(Program :: i(), Shadertype :: enum(), Name :: string()) -> i().

`gl:getSubroutineIndex/3` returns the index of a subroutine uniform within a shader stage attached to a program object. `Program` contains the name of the program to which the shader is attached. `Shadertype` specifies the stage from which to query shader subroutine index. `Name` contains the null-terminated name of the subroutine uniform whose name to query.

External documentation.

# getSubroutineUniformLocation(Program, Shadertype, Name)

    -spec getSubroutineUniformLocation(Program :: i(), Shadertype :: enum(), Name :: string()) -> i().

`gl:getSubroutineUniformLocation/3` returns the location of the subroutine uniform variable `Name` in the shader stage of type `Shadertype` attached to `Program`, with behavior otherwise identical to `gl:getUniformLocation/2`.

External documentation.

# getSynciv(Sync, Pname, BufSize)

    -spec getSynciv(Sync :: i(), Pname :: enum(), BufSize :: i()) -> [i()].

`gl:getSynciv/3` retrieves properties of a sync object. `Sync` specifies the name of the sync object whose properties to retrieve.

External documentation.

# getTexEnvfv(Target, Pname)

    -spec getTexEnvfv(Target :: enum(), Pname :: enum()) -> {f(), f(), f(), f()}.

Equivalent to `getTexEnviv/2`.

# getTexEnviv(Target, Pname)

    -spec getTexEnviv(Target :: enum(), Pname :: enum()) -> {i(), i(), i(), i()}.

`gl:getTexEnv()` returns in `Params` selected values of a texture environment that was specified with `gl:texEnv()`. `Target` specifies a texture environment.

External documentation.

# getTexGendv(Coord, Pname)

    -spec getTexGendv(Coord :: enum(), Pname :: enum()) -> {f(), f(), f(), f()}.

Equivalent to `getTexGeniv/2`.

# getTexGenfv(Coord, Pname)

    -spec getTexGenfv(Coord :: enum(), Pname :: enum()) -> {f(), f(), f(), f()}.

Equivalent to `getTexGeniv/2`.

# getTexGeniv(Coord, Pname)

    -spec getTexGeniv(Coord :: enum(), Pname :: enum()) -> {i(), i(), i(), i()}.

`gl:getTexGen()` returns in `Params` selected parameters of a texture coordinate generation function that was specified using `gl:texGen()`. `Coord` names one of the (`s`, `t`, `r`, `q`) texture coordinates, using the symbolic constant `?GL_S`, `?GL_T`, `?GL_R`, or `?GL_Q`.

External documentation.

# getTexImage(Target, Level, Format, Type, Pixels)

    -spec getTexImage(Target :: enum(), Level :: i(), Format :: enum(), Type :: enum(), Pixels :: mem()) ->
                         ok.

`gl:getTexImage/5`, `glGetnTexImage` and `glGetTextureImage` functions return a texture image into `Pixels`. For `gl:getTexImage/5` and `glGetnTexImage`, `Target` specifies whether the desired texture image is one specified by `gl:texImage1D/8` (`?GL_TEXTURE_1D`), `gl:texImage2D/9` (`?GL_TEXTURE_1D_ARRAY`, `?GL_TEXTURE_RECTANGLE`, `?GL_TEXTURE_2D` or any of `?GL_TEXTURE_CUBE_MAP_*`), or `gl:texImage3D/10` (`?GL_TEXTURE_2D_ARRAY`, `?GL_TEXTURE_3D`, `?GL_TEXTURE_CUBE_MAP_ARRAY`). For `glGetTextureImage`, `Texture` specifies the texture object name. In addition to types of textures accepted by `gl:getTexImage/5` and `glGetnTexImage`, the function also accepts cube map texture objects (with effective target `?GL_TEXTURE_CUBE_MAP`). `Level` specifies the level-of-detail number of the desired image. `Format` and `Type` specify the format and type of the desired image array. See the reference page for `gl:texImage1D/8` for a description of the acceptable values for the `Format` and `Type` parameters, respectively. For glGetnTexImage and glGetTextureImage functions, bufSize tells the size of the buffer to receive the retrieved pixel data. `glGetnTexImage` and `glGetTextureImage` do not write more than `BufSize` bytes into `Pixels`.

External documentation.

# getTexLevelParameterfv(Target, Level, Pname)

    -spec getTexLevelParameterfv(Target :: enum(), Level :: i(), Pname :: enum()) -> {f()}.

Equivalent to `getTexLevelParameteriv/3`.

# getTexLevelParameteriv(Target, Level, Pname)

    -spec getTexLevelParameteriv(Target :: enum(), Level :: i(), Pname :: enum()) -> {i()}.

`gl:getTexLevelParameterfv/3`, `gl:getTexLevelParameteriv/3`, `glGetTextureLevelParameterfv` and `glGetTextureLevelParameteriv` return in `Params` texture parameter values for a specific level-of-detail value, specified as `Level`. For the first two functions, `Target` defines the target texture, either `?GL_TEXTURE_1D`, `?GL_TEXTURE_2D`, `?GL_TEXTURE_3D`, `?GL_PROXY_TEXTURE_1D`, `?GL_PROXY_TEXTURE_2D`, `?GL_PROXY_TEXTURE_3D`, `?GL_TEXTURE_CUBE_MAP_POSITIVE_X`, `?GL_TEXTURE_CUBE_MAP_NEGATIVE_X`, `?GL_TEXTURE_CUBE_MAP_POSITIVE_Y`, `?GL_TEXTURE_CUBE_MAP_NEGATIVE_Y`, `?GL_TEXTURE_CUBE_MAP_POSITIVE_Z`, `?GL_TEXTURE_CUBE_MAP_NEGATIVE_Z`, or `?GL_PROXY_TEXTURE_CUBE_MAP`. The remaining two take a `Texture` argument which specifies the name of the texture object.

External documentation.

# getTexParameterfv(Target, Pname)

    -spec getTexParameterfv(Target :: enum(), Pname :: enum()) -> {f(), f(), f(), f()}.

Equivalent to `getTexParameteriv/2`.

# getTexParameterIiv(Target, Pname)

    -spec getTexParameterIiv(Target :: enum(), Pname :: enum()) -> {i(), i(), i(), i()}.

Equivalent to `getTexParameteriv/2`.

# getTexParameterIuiv(Target, Pname)

    -spec getTexParameterIuiv(Target :: enum(), Pname :: enum()) -> {i(), i(), i(), i()}.

Equivalent to `getTexParameteriv/2`.

# getTexParameteriv(Target, Pname)

    -spec getTexParameteriv(Target :: enum(), Pname :: enum()) -> {i(), i(), i(), i()}.

`gl:getTexParameter()` and `glGetTextureParameter` return in `Params` the value or values of the texture parameter specified as `Pname`. `Target` defines the target texture. `?GL_TEXTURE_1D`, `?GL_TEXTURE_2D`, `?GL_TEXTURE_3D`, `?GL_TEXTURE_1D_ARRAY`, `?GL_TEXTURE_2D_ARRAY`, `?GL_TEXTURE_RECTANGLE`, `?GL_TEXTURE_CUBE_MAP`, `?GL_TEXTURE_CUBE_MAP_ARRAY`, `?GL_TEXTURE_2D_MULTISAMPLE`, or `?GL_TEXTURE_2D_MULTISAMPLE_ARRAY` specify one-, two-, or three-dimensional, one-dimensional array, two-dimensional array, rectangle, cube-mapped or cube-mapped array, two-dimensional multisample, or two-dimensional multisample array texturing, respectively. `Pname` accepts the same symbols as `gl:texParameter()`, with the same interpretations:

External documentation.

# getTransformFeedbackVarying(Program, Index, BufSize)

    -spec getTransformFeedbackVarying(Program :: i(), Index :: i(), BufSize :: i()) ->
                                         {Size :: i(), Type :: enum(), Name :: string()}.

Information about the set of varying variables in a linked program that will be captured during transform feedback may be retrieved by calling `gl:getTransformFeedbackVarying/3`. `gl:getTransformFeedbackVarying/3` provides information about the varying variable selected by `Index`. An `Index` of 0 selects the first varying variable specified in the `Varyings` array passed to `gl:transformFeedbackVaryings/3`, and an `Index` of the value of `?GL_TRANSFORM_FEEDBACK_VARYINGS` minus one selects the last such variable.

External documentation.

# getUniformBlockIndex(Program, UniformBlockName)

    -spec getUniformBlockIndex(Program :: i(), UniformBlockName :: string()) -> i().

`gl:getUniformBlockIndex/2` retrieves the index of a uniform block within `Program`.

External documentation.

# getUniformdv(Program, Location)

    -spec getUniformdv(Program :: i(), Location :: i()) -> matrix().

Equivalent to `getUniformuiv/2`.

# getUniformfv(Program, Location)

    -spec getUniformfv(Program :: i(), Location :: i()) -> matrix().

Equivalent to `getUniformuiv/2`.

# getUniformIndices(Program, UniformNames)

    -spec getUniformIndices(Program :: i(), UniformNames :: [unicode:chardata()]) -> [i()].

`gl:getUniformIndices/2` retrieves the indices of a number of uniforms within `Program`.

External documentation.

# getUniformiv(Program, Location)

    -spec getUniformiv(Program :: i(), Location :: i()) ->
                          {i(), i(), i(), i(), i(), i(), i(), i(), i(), i(), i(), i(), i(), i(), i(), i()}.

Equivalent to `getUniformuiv/2`.

# getUniformLocation(Program, Name)

    -spec getUniformLocation(Program :: i(), Name :: string()) -> i().

`glGetUniformLocation`returns an integer that represents the location of a specific uniform variable within a program object. `Name` must be a null terminated string that contains no white space. `Name` must be an active uniform variable name in `Program` that is not a structure, an array of structures, or a subcomponent of a vector or a matrix. This function returns -1 if `Name` does not correspond to an active uniform variable in `Program`, if `Name` starts with the reserved prefix "gl_", or if `Name` is associated with an atomic counter or a named uniform block.

External documentation.

# getUniformSubroutineuiv(Shadertype, Location)

    -spec getUniformSubroutineuiv(Shadertype :: enum(), Location :: i()) ->
                                     {i(),
                                      i(),
                                      i(),
                                      i(),
                                      i(),
                                      i(),
                                      i(),
                                      i(),
                                      i(),
                                      i(),
                                      i(),
                                      i(),
                                      i(),
                                      i(),
                                      i(),
                                      i()}.

`gl:getUniformSubroutine()` retrieves the value of the subroutine uniform at location `Location` for shader stage `Shadertype` of the current program. `Location` must be less than the value of `?GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS` for the shader currently in use at shader stage `Shadertype`. The value of the subroutine uniform is returned in `Values`.

External documentation.

# getUniformuiv(Program, Location)

    -spec getUniformuiv(Program :: i(), Location :: i()) ->
                           {i(), i(), i(), i(), i(), i(), i(), i(), i(), i(), i(), i(), i(), i(), i(), i()}.

`gl:getUniform()` and `glGetnUniform` return in `Params` the value(s) of the specified uniform variable. The type of the uniform variable specified by `Location` determines the number of values returned. If the uniform variable is defined in the shader as a boolean, int, or float, a single value will be returned. If it is defined as a vec2, ivec2, or bvec2, two values will be returned. If it is defined as a vec3, ivec3, or bvec3, three values will be returned, and so on. To query values stored in uniform variables declared as arrays, call `gl:getUniform()` for each element of the array. To query values stored in uniform variables declared as structures, call `gl:getUniform()` for each field in the structure. The values for uniform variables declared as a matrix will be returned in column major order.

External documentation.

# getVertexAttribdv(Index, Pname)

    -spec getVertexAttribdv(Index :: i(), Pname :: enum()) -> {f(), f(), f(), f()}.

Equivalent to `getVertexAttribiv/2`.

# getVertexAttribfv(Index, Pname)

    -spec getVertexAttribfv(Index :: i(), Pname :: enum()) -> {f(), f(), f(), f()}.

Equivalent to `getVertexAttribiv/2`.

# getVertexAttribIiv(Index, Pname)

    -spec getVertexAttribIiv(Index :: i(), Pname :: enum()) -> {i(), i(), i(), i()}.

Equivalent to `getVertexAttribiv/2`.

# getVertexAttribIuiv(Index, Pname)

    -spec getVertexAttribIuiv(Index :: i(), Pname :: enum()) -> {i(), i(), i(), i()}.

Equivalent to `getVertexAttribiv/2`.

# getVertexAttribiv(Index, Pname)

    -spec getVertexAttribiv(Index :: i(), Pname :: enum()) -> {i(), i(), i(), i()}.

`gl:getVertexAttrib()` returns in `Params` the value of a generic vertex attribute parameter. The generic vertex attribute to be queried is specified by `Index`, and the parameter to be queried is specified by `Pname`.

External documentation.

# getVertexAttribLdv(Index, Pname)

    -spec getVertexAttribLdv(Index :: i(), Pname :: enum()) -> {f(), f(), f(), f()}.

Equivalent to `getVertexAttribiv/2`.

# hint(Target, Mode)

    -spec hint(Target :: enum(), Mode :: enum()) -> ok.

Certain aspects of GL behavior, when there is room for interpretation, can be controlled with hints. A hint is specified with two arguments. `Target` is a symbolic constant indicating the behavior to be controlled, and `Mode` is another symbolic constant indicating the desired behavior. The initial value for each `Target` is `?GL_DONT_CARE`. `Mode` can be one of the following:

External documentation.

# histogram(Target, Width, Internalformat, Sink)

    -spec histogram(Target :: enum(), Width :: i(), Internalformat :: enum(), Sink :: 0 | 1) -> ok.

When `?GL_HISTOGRAM` is enabled, RGBA color components are converted to histogram table indices by clamping to the range [0,1], multiplying by the width of the histogram table, and rounding to the nearest integer. The table entries selected by the RGBA indices are then incremented. (If the internal format of the histogram table includes luminance, then the index derived from the R color component determines the luminance table entry to be incremented.) If a histogram table entry is incremented beyond its maximum value, then its value becomes undefined. (This is not an error.)

External documentation.

# indexd(C)

    -spec indexd(C :: f()) -> ok.

Equivalent to `indexubv/1`.

# indexdv/1

    -spec indexdv({C :: f()}) -> ok.

Equivalent to `indexubv/1`.

# indexf(C)

    -spec indexf(C :: f()) -> ok.

Equivalent to `indexubv/1`.

# indexfv/1

    -spec indexfv({C :: f()}) -> ok.

Equivalent to `indexubv/1`.

# indexi(C)

    -spec indexi(C :: i()) -> ok.

Equivalent to `indexubv/1`.

# indexiv/1

    -spec indexiv({C :: i()}) -> ok.

Equivalent to `indexubv/1`.

# indexMask(Mask)

    -spec indexMask(Mask :: i()) -> ok.

`gl:indexMask/1` controls the writing of individual bits in the color index buffers. The least significant n bits of `Mask`, where n is the number of bits in a color index buffer, specify a mask. Where a 1 (one) appears in the mask, it's possible to write to the corresponding bit in the color index buffer (or buffers). Where a 0 (zero) appears, the corresponding bit is write-protected.

External documentation.

# indexPointer(Type, Stride, Ptr)

    -spec indexPointer(Type :: enum(), Stride :: i(), Ptr :: offset() | mem()) -> ok.

`gl:indexPointer/3` specifies the location and data format of an array of color indexes to use when rendering. `Type` specifies the data type of each color index and `Stride` specifies the byte stride from one color index to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays.

External documentation.

# indexs(C)

    -spec indexs(C :: i()) -> ok.

Equivalent to `indexubv/1`.

# indexsv/1

    -spec indexsv({C :: i()}) -> ok.

Equivalent to `indexubv/1`.

# indexub(C)

    -spec indexub(C :: i()) -> ok.

Equivalent to `indexubv/1`.

# indexubv/1

    -spec indexubv({C :: i()}) -> ok.

`gl:index()` updates the current (single-valued) color index. It takes one argument, the new value for the current color index.

External documentation.

# initNames()

    -spec initNames() -> ok.

The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers. `gl:initNames/0` causes the name stack to be initialized to its default empty state.

External documentation.

# interleavedArrays(Format, Stride, Pointer)

    -spec interleavedArrays(Format :: enum(), Stride :: i(), Pointer :: offset() | mem()) -> ok.

`gl:interleavedArrays/3` lets you specify and enable individual color, normal, texture and vertex arrays whose elements are part of a larger aggregate array element. For some implementations, this is more efficient than specifying the arrays separately.

External documentation.

# invalidateBufferData(Buffer)

    -spec invalidateBufferData(Buffer :: i()) -> ok.

`gl:invalidateBufferData/1` invalidates all of the content of the data store of a buffer object. After invalidation, the content of the buffer's data store becomes undefined.

External documentation.

# invalidateBufferSubData(Buffer, Offset, Length)

    -spec invalidateBufferSubData(Buffer :: i(), Offset :: i(), Length :: i()) -> ok.

`gl:invalidateBufferSubData/3` invalidates all or part of the content of the data store of a buffer object. After invalidation, the content of the specified range of the buffer's data store becomes undefined. The start of the range is given by `Offset` and its size is given by `Length`, both measured in basic machine units.

External documentation.

# invalidateFramebuffer(Target, Attachments)

    -spec invalidateFramebuffer(Target :: enum(), Attachments :: [enum()]) -> ok.

`gl:invalidateFramebuffer/2` and `glInvalidateNamedFramebufferData` invalidate the entire contents of a specified set of attachments of a framebuffer.

External documentation.

# invalidateSubFramebuffer(Target, Attachments, X, Y, Width, Height)

    -spec invalidateSubFramebuffer(Target :: enum(),
                                   Attachments :: [enum()],
                                   X :: i(),
                                   Y :: i(),
                                   Width :: i(),
                                   Height :: i()) ->
                                      ok.

`gl:invalidateSubFramebuffer/6` and `glInvalidateNamedFramebufferSubData` invalidate the contents of a specified region of a specified set of attachments of a framebuffer.

External documentation.

# invalidateTexImage(Texture, Level)

    -spec invalidateTexImage(Texture :: i(), Level :: i()) -> ok.

`gl:invalidateTexSubImage/8` invalidates all of a texture image. `Texture` and `Level` indicated which texture image is being invalidated. After this command, data in the texture image has undefined values.

External documentation.

# invalidateTexSubImage(Texture, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth)

    -spec invalidateTexSubImage(Texture, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth) -> ok
                                   when
                                       Texture :: i(),
                                       Level :: i(),
                                       Xoffset :: i(),
                                       Yoffset :: i(),
                                       Zoffset :: i(),
                                       Width :: i(),
                                       Height :: i(),
                                       Depth :: i().

`gl:invalidateTexSubImage/8` invalidates all or part of a texture image. `Texture` and `Level` indicated which texture image is being invalidated. After this command, data in that subregion have undefined values. `Xoffset`, `Yoffset`, `Zoffset`, `Width`, `Height`, and `Depth` are interpreted as they are in `gl:texSubImage3D/11`. For texture targets that don't have certain dimensions, this command treats those dimensions as having a size of 1. For example, to invalidate a portion of a two- dimensional texture, the application would use `Zoffset` equal to zero and `Depth` equal to one. Cube map textures are treated as an array of six slices in the z-dimension, where a value of `Zoffset` is interpreted as specifying face `?GL_TEXTURE_CUBE_MAP_POSITIVE_X` + `Zoffset`.

External documentation.

# isBuffer(Buffer)

    -spec isBuffer(Buffer :: i()) -> 0 | 1.

`gl:isBuffer/1` returns `?GL_TRUE` if `Buffer` is currently the name of a buffer object. If `Buffer` is zero, or is a non-zero value that is not currently the name of a buffer object, or if an error occurs, `gl:isBuffer/1` returns `?GL_FALSE`.

External documentation.

# isEnabled(Cap)

    -spec isEnabled(Cap :: enum()) -> 0 | 1.

Equivalent to `isEnabledi/2`.

# isEnabledi(Target, Index)

    -spec isEnabledi(Target :: enum(), Index :: i()) -> 0 | 1.

`gl:isEnabled/1` returns `?GL_TRUE` if `Cap` is an enabled capability and returns `?GL_FALSE` otherwise. Boolean states that are indexed may be tested with `gl:isEnabledi/2`. For `gl:isEnabledi/2`, `Index` specifies the index of the capability to test. `Index` must be between zero and the count of indexed capabilities for `Cap`. Initially all capabilities except `?GL_DITHER` are disabled; `?GL_DITHER` is initially enabled.

External documentation.

# isFramebuffer(Framebuffer)

    -spec isFramebuffer(Framebuffer :: i()) -> 0 | 1.

`gl:isFramebuffer/1` returns `?GL_TRUE` if `Framebuffer` is currently the name of a framebuffer object. If `Framebuffer` is zero, or if `?framebuffer` is not the name of a framebuffer object, or if an error occurs, `gl:isFramebuffer/1` returns `?GL_FALSE`. If `Framebuffer` is a name returned by `gl:genFramebuffers/1`, by that has not yet been bound through a call to `gl:bindFramebuffer/2`, then the name is not a framebuffer object and `gl:isFramebuffer/1` returns `?GL_FALSE`.

External documentation.

# isList(List)

    -spec isList(List :: i()) -> 0 | 1.

`gl:isList/1` returns `?GL_TRUE` if `List` is the name of a display list and returns `?GL_FALSE` if it is not, or if an error occurs.

External documentation.

# isProgram(Program)

    -spec isProgram(Program :: i()) -> 0 | 1.

`gl:isProgram/1` returns `?GL_TRUE` if `Program` is the name of a program object previously created with `gl:createProgram/0` and not yet deleted with `gl:deleteProgram/1`. If `Program` is zero or a non-zero value that is not the name of a program object, or if an error occurs, `gl:isProgram/1` returns `?GL_FALSE`.

External documentation.

# isProgramPipeline(Pipeline)

    -spec isProgramPipeline(Pipeline :: i()) -> 0 | 1.

`gl:isProgramPipeline/1` returns `?GL_TRUE` if `Pipeline` is currently the name of a program pipeline object. If `Pipeline` is zero, or if `?pipeline` is not the name of a program pipeline object, or if an error occurs, `gl:isProgramPipeline/1` returns `?GL_FALSE`. If `Pipeline` is a name returned by `gl:genProgramPipelines/1`, but that has not yet been bound through a call to `gl:bindProgramPipeline/1`, then the name is not a program pipeline object and `gl:isProgramPipeline/1` returns `?GL_FALSE`.

External documentation.

# isQuery(Id)

    -spec isQuery(Id :: i()) -> 0 | 1.

`gl:isQuery/1` returns `?GL_TRUE` if `Id` is currently the name of a query object. If `Id` is zero, or is a non-zero value that is not currently the name of a query object, or if an error occurs, `gl:isQuery/1` returns `?GL_FALSE`.

External documentation.

# isRenderbuffer(Renderbuffer)

    -spec isRenderbuffer(Renderbuffer :: i()) -> 0 | 1.

`gl:isRenderbuffer/1` returns `?GL_TRUE` if `Renderbuffer` is currently the name of a renderbuffer object. If `Renderbuffer` is zero, or if `Renderbuffer` is not the name of a renderbuffer object, or if an error occurs, `gl:isRenderbuffer/1` returns `?GL_FALSE`. If `Renderbuffer` is a name returned by `gl:genRenderbuffers/1`, by that has not yet been bound through a call to `gl:bindRenderbuffer/2` or `gl:framebufferRenderbuffer/4`, then the name is not a renderbuffer object and `gl:isRenderbuffer/1` returns `?GL_FALSE`.

External documentation.

# isSampler(Sampler)

    -spec isSampler(Sampler :: i()) -> 0 | 1.

`gl:isSampler/1` returns `?GL_TRUE` if `Id` is currently the name of a sampler object. If `Id` is zero, or is a non-zero value that is not currently the name of a sampler object, or if an error occurs, `gl:isSampler/1` returns `?GL_FALSE`.

External documentation.

# isShader(Shader)

    -spec isShader(Shader :: i()) -> 0 | 1.

`gl:isShader/1` returns `?GL_TRUE` if `Shader` is the name of a shader object previously created with `gl:createShader/1` and not yet deleted with `gl:deleteShader/1`. If `Shader` is zero or a non-zero value that is not the name of a shader object, or if an error occurs, `glIsShader`returns `?GL_FALSE`.

External documentation.

# isSync(Sync)

    -spec isSync(Sync :: i()) -> 0 | 1.

`gl:isSync/1` returns `?GL_TRUE` if `Sync` is currently the name of a sync object. If `Sync` is not the name of a sync object, or if an error occurs, `gl:isSync/1` returns `?GL_FALSE`. Note that zero is not the name of a sync object.

External documentation.

# isTexture(Texture)

    -spec isTexture(Texture :: i()) -> 0 | 1.

`gl:isTexture/1` returns `?GL_TRUE` if `Texture` is currently the name of a texture. If `Texture` is zero, or is a non-zero value that is not currently the name of a texture, or if an error occurs, `gl:isTexture/1` returns `?GL_FALSE`.

External documentation.

# isTransformFeedback(Id)

    -spec isTransformFeedback(Id :: i()) -> 0 | 1.

`gl:isTransformFeedback/1` returns `?GL_TRUE` if `Id` is currently the name of a transform feedback object. If `Id` is zero, or if `?id` is not the name of a transform feedback object, or if an error occurs, `gl:isTransformFeedback/1` returns `?GL_FALSE`. If `Id` is a name returned by `gl:genTransformFeedbacks/1`, but that has not yet been bound through a call to `gl:bindTransformFeedback/2`, then the name is not a transform feedback object and `gl:isTransformFeedback/1` returns `?GL_FALSE`.

External documentation.

# isVertexArray(Array)

    -spec isVertexArray(Array :: i()) -> 0 | 1.

`gl:isVertexArray/1` returns `?GL_TRUE` if `Array` is currently the name of a vertex array object. If `Array` is zero, or if `Array` is not the name of a vertex array object, or if an error occurs, `gl:isVertexArray/1` returns `?GL_FALSE`. If `Array` is a name returned by `gl:genVertexArrays/1`, by that has not yet been bound through a call to `gl:bindVertexArray/1`, then the name is not a vertex array object and `gl:isVertexArray/1` returns `?GL_FALSE`.

External documentation.

# lightf(Light, Pname, Param)

    -spec lightf(Light :: enum(), Pname :: enum(), Param :: f()) -> ok.

Equivalent to `lightiv/3`.

# lightfv(Light, Pname, Params)

    -spec lightfv(Light :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

Equivalent to `lightiv/3`.

# lighti(Light, Pname, Param)

    -spec lighti(Light :: enum(), Pname :: enum(), Param :: i()) -> ok.

Equivalent to `lightiv/3`.

# lightiv(Light, Pname, Params)

    -spec lightiv(Light :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

`gl:light()` sets the values of individual light source parameters. `Light` names the light and is a symbolic name of the form `?GL_LIGHT` i, where i ranges from 0 to the value of `?GL_MAX_LIGHTS` - 1. `Pname` specifies one of ten light source parameters, again by symbolic name. `Params` is either a single value or a pointer to an array that contains the new values.

External documentation.

# lightModelf(Pname, Param)

    -spec lightModelf(Pname :: enum(), Param :: f()) -> ok.

Equivalent to `lightModeliv/2`.

# lightModelfv(Pname, Params)

    -spec lightModelfv(Pname :: enum(), Params :: tuple()) -> ok.

Equivalent to `lightModeliv/2`.

# lightModeli(Pname, Param)

    -spec lightModeli(Pname :: enum(), Param :: i()) -> ok.

Equivalent to `lightModeliv/2`.

# lightModeliv(Pname, Params)

    -spec lightModeliv(Pname :: enum(), Params :: tuple()) -> ok.

`gl:lightModel()` sets the lighting model parameter. `Pname` names a parameter and `Params` gives the new value. There are three lighting model parameters:

External documentation.

# lineStipple(Factor, Pattern)

    -spec lineStipple(Factor :: i(), Pattern :: i()) -> ok.

Line stippling masks out certain fragments produced by rasterization; those fragments will not be drawn. The masking is achieved by using three parameters: the 16-bit line stipple pattern `Pattern`, the repeat count `Factor`, and an integer stipple counter s.

External documentation.

# lineWidth(Width)

    -spec lineWidth(Width :: f()) -> ok.

`gl:lineWidth/1` specifies the rasterized width of both aliased and antialiased lines. Using a line width other than 1 has different effects, depending on whether line antialiasing is enabled. To enable and disable line antialiasing, call `gl:enable/1` and `gl:disable/1` with argument `?GL_LINE_SMOOTH`. Line antialiasing is initially disabled.

External documentation.

# linkProgram(Program)

    -spec linkProgram(Program :: i()) -> ok.

`gl:linkProgram/1` links the program object specified by `Program`. If any shader objects of type `?GL_VERTEX_SHADER` are attached to `Program`, they will be used to create an executable that will run on the programmable vertex processor. If any shader objects of type `?GL_GEOMETRY_SHADER` are attached to `Program`, they will be used to create an executable that will run on the programmable geometry processor. If any shader objects of type `?GL_FRAGMENT_SHADER` are attached to `Program`, they will be used to create an executable that will run on the programmable fragment processor.

External documentation.

# listBase(Base)

    -spec listBase(Base :: i()) -> ok.

`gl:callLists/1` specifies an array of offsets. Display-list names are generated by adding `Base` to each offset. Names that reference valid display lists are executed; the others are ignored.

External documentation.

# loadIdentity()

    -spec loadIdentity() -> ok.

`gl:loadIdentity/0` replaces the current matrix with the identity matrix. It is semantically equivalent to calling `gl:loadMatrix()` with the identity matrix

External documentation.

# loadMatrixd(M)

    -spec loadMatrixd(M :: matrix()) -> ok.

Equivalent to `loadMatrixf/1`.

# loadMatrixf(M)

    -spec loadMatrixf(M :: matrix()) -> ok.

`gl:loadMatrix()` replaces the current matrix with the one whose elements are specified by `M`. The current matrix is the projection matrix, modelview matrix, or texture matrix, depending on the current matrix mode (see `gl:matrixMode/1`).

External documentation.

# loadName(Name)

    -spec loadName(Name :: i()) -> ok.

The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers and is initially empty.

External documentation.

# loadTransposeMatrixd(M)

    -spec loadTransposeMatrixd(M :: matrix()) -> ok.

Equivalent to `loadTransposeMatrixf/1`.

# loadTransposeMatrixf(M)

    -spec loadTransposeMatrixf(M :: matrix()) -> ok.

`gl:loadTransposeMatrix()` replaces the current matrix with the one whose elements are specified by `M`. The current matrix is the projection matrix, modelview matrix, or texture matrix, depending on the current matrix mode (see `gl:matrixMode/1`).

External documentation.

# logicOp(Opcode)

    -spec logicOp(Opcode :: enum()) -> ok.

`gl:logicOp/1` specifies a logical operation that, when enabled, is applied between the incoming RGBA color and the RGBA color at the corresponding location in the frame buffer. To enable or disable the logical operation, call `gl:enable/1` and `gl:disable/1` using the symbolic constant `?GL_COLOR_LOGIC_OP`. The initial value is disabled.

External documentation.

# map1d(Target, U1, U2, Stride, Order, Points)

    -spec map1d(Target :: enum(), U1 :: f(), U2 :: f(), Stride :: i(), Order :: i(), Points :: binary()) ->
                   ok.

Equivalent to `map1f/6`.

# map1f(Target, U1, U2, Stride, Order, Points)

    -spec map1f(Target :: enum(), U1 :: f(), U2 :: f(), Stride :: i(), Order :: i(), Points :: binary()) ->
                   ok.

Evaluators provide a way to use polynomial or rational polynomial mapping to produce vertices, normals, texture coordinates, and colors. The values produced by an evaluator are sent to further stages of GL processing just as if they had been presented using `gl:vertex()`, `gl:normal()`, `gl:texCoord()`, and `gl:color()` commands, except that the generated values do not update the current normal, texture coordinates, or color.

External documentation.

# map2d(Target, U1, U2, Ustride, Uorder, V1, V2, Vstride, Vorder, Points)

    -spec map2d(Target, U1, U2, Ustride, Uorder, V1, V2, Vstride, Vorder, Points) -> ok
                   when
                       Target :: enum(),
                       U1 :: f(),
                       U2 :: f(),
                       Ustride :: i(),
                       Uorder :: i(),
                       V1 :: f(),
                       V2 :: f(),
                       Vstride :: i(),
                       Vorder :: i(),
                       Points :: binary().

Equivalent to `map2f/10`.

# map2f(Target, U1, U2, Ustride, Uorder, V1, V2, Vstride, Vorder, Points)

    -spec map2f(Target, U1, U2, Ustride, Uorder, V1, V2, Vstride, Vorder, Points) -> ok
                   when
                       Target :: enum(),
                       U1 :: f(),
                       U2 :: f(),
                       Ustride :: i(),
                       Uorder :: i(),
                       V1 :: f(),
                       V2 :: f(),
                       Vstride :: i(),
                       Vorder :: i(),
                       Points :: binary().

Evaluators provide a way to use polynomial or rational polynomial mapping to produce vertices, normals, texture coordinates, and colors. The values produced by an evaluator are sent on to further stages of GL processing just as if they had been presented using `gl:vertex()`, `gl:normal()`, `gl:texCoord()`, and `gl:color()` commands, except that the generated values do not update the current normal, texture coordinates, or color.

External documentation.

# mapGrid1d(Un, U1, U2)

    -spec mapGrid1d(Un :: i(), U1 :: f(), U2 :: f()) -> ok.

Equivalent to `mapGrid2f/6`.

# mapGrid1f(Un, U1, U2)

    -spec mapGrid1f(Un :: i(), U1 :: f(), U2 :: f()) -> ok.

Equivalent to `mapGrid2f/6`.

# mapGrid2d(Un, U1, U2, Vn, V1, V2)

    -spec mapGrid2d(Un :: i(), U1 :: f(), U2 :: f(), Vn :: i(), V1 :: f(), V2 :: f()) -> ok.

Equivalent to `mapGrid2f/6`.

# mapGrid2f(Un, U1, U2, Vn, V1, V2)

    -spec mapGrid2f(Un :: i(), U1 :: f(), U2 :: f(), Vn :: i(), V1 :: f(), V2 :: f()) -> ok.

`gl:mapGrid()` and `gl:evalMesh()` are used together to efficiently generate and evaluate a series of evenly-spaced map domain values. `gl:evalMesh()` steps through the integer domain of a one- or two-dimensional grid, whose range is the domain of the evaluation maps specified by `glMap1` and `glMap2`.

External documentation.

# materialf(Face, Pname, Param)

    -spec materialf(Face :: enum(), Pname :: enum(), Param :: f()) -> ok.

Equivalent to `materialiv/3`.

# materialfv(Face, Pname, Params)

    -spec materialfv(Face :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

Equivalent to `materialiv/3`.

# materiali(Face, Pname, Param)

    -spec materiali(Face :: enum(), Pname :: enum(), Param :: i()) -> ok.

Equivalent to `materialiv/3`.

# materialiv(Face, Pname, Params)

    -spec materialiv(Face :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

`gl:material()` assigns values to material parameters. There are two matched sets of material parameters. One, the `front-facing` set, is used to shade points, lines, bitmaps, and all polygons (when two-sided lighting is disabled), or just front-facing polygons (when two-sided lighting is enabled). The other set, `back-facing`, is used to shade back-facing polygons only when two-sided lighting is enabled. Refer to the `gl:lightModel()` reference page for details concerning one- and two-sided lighting calculations.

External documentation.

# matrixMode(Mode)

    -spec matrixMode(Mode :: enum()) -> ok.

`gl:matrixMode/1` sets the current matrix mode. `Mode` can assume one of four values:

External documentation.

# memoryBarrier(Barriers)

    -spec memoryBarrier(Barriers :: i()) -> ok.

Equivalent to `memoryBarrierByRegion/1`.

# memoryBarrierByRegion(Barriers)

    -spec memoryBarrierByRegion(Barriers :: i()) -> ok.

`gl:memoryBarrier/1` defines a barrier ordering the memory transactions issued prior to the command relative to those issued after the barrier. For the purposes of this ordering, memory transactions performed by shaders are considered to be issued by the rendering command that triggered the execution of the shader. `Barriers` is a bitfield indicating the set of operations that are synchronized with shader stores; the bits used in `Barriers` are as follows:

External documentation.

# minmax(Target, Internalformat, Sink)

    -spec minmax(Target :: enum(), Internalformat :: enum(), Sink :: 0 | 1) -> ok.

When `?GL_MINMAX` is enabled, the RGBA components of incoming pixels are compared to the minimum and maximum values for each component, which are stored in the two-element minmax table. (The first element stores the minima, and the second element stores the maxima.) If a pixel component is greater than the corresponding component in the maximum element, then the maximum element is updated with the pixel component value. If a pixel component is less than the corresponding component in the minimum element, then the minimum element is updated with the pixel component value. (In both cases, if the internal format of the minmax table includes luminance, then the R color component of incoming pixels is used for comparison.) The contents of the minmax table may be retrieved at a later time by calling `gl:getMinmax/5`. The minmax operation is enabled or disabled by calling `gl:enable/1` or `gl:disable/1`, respectively, with an argument of `?GL_MINMAX`.

External documentation.

# minSampleShading(Value)

    -spec minSampleShading(Value :: f()) -> ok.

`gl:minSampleShading/1` specifies the rate at which samples are shaded within a covered pixel. Sample-rate shading is enabled by calling `gl:enable/1` with the parameter `?GL_SAMPLE_SHADING`. If `?GL_MULTISAMPLE` or `?GL_SAMPLE_SHADING` is disabled, sample shading has no effect. Otherwise, an implementation must provide at least as many unique color values for each covered fragment as specified by `Value` times `Samples` where `Samples` is the value of `?GL_SAMPLES` for the current framebuffer. At least 1 sample for each covered fragment is generated.

External documentation.

# multiDrawArrays(Mode, First, Count)

    -spec multiDrawArrays(Mode :: enum(), First :: [integer()] | mem(), Count :: [integer()] | mem()) -> ok.

`gl:multiDrawArrays/3` specifies multiple sets of geometric primitives with very few subroutine calls. Instead of calling a GL procedure to pass each individual vertex, normal, texture coordinate, edge flag, or color, you can prespecify separate arrays of vertices, normals, and colors and use them to construct a sequence of primitives with a single call to `gl:multiDrawArrays/3`.

External documentation.

# multiDrawArraysIndirect(Mode, Indirect, Drawcount, Stride)

    -spec multiDrawArraysIndirect(Mode :: enum(),
                                  Indirect :: offset() | mem(),
                                  Drawcount :: i(),
                                  Stride :: i()) ->
                                     ok.

`gl:multiDrawArraysIndirect/4` specifies multiple geometric primitives with very few subroutine calls. `gl:multiDrawArraysIndirect/4` behaves similarly to a multitude of calls to `gl:drawArraysInstancedBaseInstance/5`, execept that the parameters to each call to `gl:drawArraysInstancedBaseInstance/5` are stored in an array in memory at the address given by `Indirect`, separated by the stride, in basic machine units, specified by `Stride`. If `Stride` is zero, then the array is assumed to be tightly packed in memory.

External documentation.

# multiDrawArraysIndirectCount(Mode, Indirect, Drawcount, Maxdrawcount, Stride)

    -spec multiDrawArraysIndirectCount(Mode, Indirect, Drawcount, Maxdrawcount, Stride) -> ok
                                          when
                                              Mode :: enum(),
                                              Indirect :: offset() | mem(),
                                              Drawcount :: i(),
                                              Maxdrawcount :: i(),
                                              Stride :: i().

No documentation available.

# multiTexCoord1d(Target, S)

    -spec multiTexCoord1d(Target :: enum(), S :: f()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord1dv/2

    -spec multiTexCoord1dv(Target :: enum(), {S :: f()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord1f(Target, S)

    -spec multiTexCoord1f(Target :: enum(), S :: f()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord1fv/2

    -spec multiTexCoord1fv(Target :: enum(), {S :: f()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord1i(Target, S)

    -spec multiTexCoord1i(Target :: enum(), S :: i()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord1iv/2

    -spec multiTexCoord1iv(Target :: enum(), {S :: i()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord1s(Target, S)

    -spec multiTexCoord1s(Target :: enum(), S :: i()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord1sv/2

    -spec multiTexCoord1sv(Target :: enum(), {S :: i()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord2d(Target, S, T)

    -spec multiTexCoord2d(Target :: enum(), S :: f(), T :: f()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord2dv/2

    -spec multiTexCoord2dv(Target :: enum(), {S :: f(), T :: f()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord2f(Target, S, T)

    -spec multiTexCoord2f(Target :: enum(), S :: f(), T :: f()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord2fv/2

    -spec multiTexCoord2fv(Target :: enum(), {S :: f(), T :: f()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord2i(Target, S, T)

    -spec multiTexCoord2i(Target :: enum(), S :: i(), T :: i()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord2iv/2

    -spec multiTexCoord2iv(Target :: enum(), {S :: i(), T :: i()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord2s(Target, S, T)

    -spec multiTexCoord2s(Target :: enum(), S :: i(), T :: i()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord2sv/2

    -spec multiTexCoord2sv(Target :: enum(), {S :: i(), T :: i()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord3d(Target, S, T, R)

    -spec multiTexCoord3d(Target :: enum(), S :: f(), T :: f(), R :: f()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord3dv/2

    -spec multiTexCoord3dv(Target :: enum(), {S :: f(), T :: f(), R :: f()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord3f(Target, S, T, R)

    -spec multiTexCoord3f(Target :: enum(), S :: f(), T :: f(), R :: f()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord3fv/2

    -spec multiTexCoord3fv(Target :: enum(), {S :: f(), T :: f(), R :: f()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord3i(Target, S, T, R)

    -spec multiTexCoord3i(Target :: enum(), S :: i(), T :: i(), R :: i()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord3iv/2

    -spec multiTexCoord3iv(Target :: enum(), {S :: i(), T :: i(), R :: i()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord3s(Target, S, T, R)

    -spec multiTexCoord3s(Target :: enum(), S :: i(), T :: i(), R :: i()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord3sv/2

    -spec multiTexCoord3sv(Target :: enum(), {S :: i(), T :: i(), R :: i()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord4d(Target, S, T, R, Q)

    -spec multiTexCoord4d(Target :: enum(), S :: f(), T :: f(), R :: f(), Q :: f()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord4dv/2

    -spec multiTexCoord4dv(Target :: enum(), {S :: f(), T :: f(), R :: f(), Q :: f()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord4f(Target, S, T, R, Q)

    -spec multiTexCoord4f(Target :: enum(), S :: f(), T :: f(), R :: f(), Q :: f()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord4fv/2

    -spec multiTexCoord4fv(Target :: enum(), {S :: f(), T :: f(), R :: f(), Q :: f()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord4i(Target, S, T, R, Q)

    -spec multiTexCoord4i(Target :: enum(), S :: i(), T :: i(), R :: i(), Q :: i()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord4iv/2

    -spec multiTexCoord4iv(Target :: enum(), {S :: i(), T :: i(), R :: i(), Q :: i()}) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord4s(Target, S, T, R, Q)

    -spec multiTexCoord4s(Target :: enum(), S :: i(), T :: i(), R :: i(), Q :: i()) -> ok.

Equivalent to `multiTexCoord4sv/2`.

# multiTexCoord4sv/2

    -spec multiTexCoord4sv(Target :: enum(), {S :: i(), T :: i(), R :: i(), Q :: i()}) -> ok.

`gl:multiTexCoord()` specifies texture coordinates in one, two, three, or four dimensions. `gl:multiTexCoord1()` sets the current texture coordinates to (s 0 0 1); a call to `gl:multiTexCoord2()` sets them to (s t 0 1). Similarly, `gl:multiTexCoord3()` specifies the texture coordinates as (s t r 1), and `gl:multiTexCoord4()` defines all four components explicitly as (s t r q).

External documentation.

# multMatrixd(M)

    -spec multMatrixd(M :: matrix()) -> ok.

Equivalent to `multMatrixf/1`.

# multMatrixf(M)

    -spec multMatrixf(M :: matrix()) -> ok.

`gl:multMatrix()` multiplies the current matrix with the one specified using `M`, and replaces the current matrix with the product.

External documentation.

# multTransposeMatrixd(M)

    -spec multTransposeMatrixd(M :: matrix()) -> ok.

Equivalent to `multTransposeMatrixf/1`.

# multTransposeMatrixf(M)

    -spec multTransposeMatrixf(M :: matrix()) -> ok.

`gl:multTransposeMatrix()` multiplies the current matrix with the one specified using `M`, and replaces the current matrix with the product.

External documentation.

# newList(List, Mode)

    -spec newList(List :: i(), Mode :: enum()) -> ok.

Display lists are groups of GL commands that have been stored for subsequent execution. Display lists are created with `gl:newList/2`. All subsequent commands are placed in the display list, in the order issued, until `gl:endList/0` is called.

External documentation.

# normal3b(Nx, Ny, Nz)

    -spec normal3b(Nx :: i(), Ny :: i(), Nz :: i()) -> ok.

Equivalent to `normal3sv/1`.

# normal3bv/1

    -spec normal3bv({Nx :: i(), Ny :: i(), Nz :: i()}) -> ok.

Equivalent to `normal3sv/1`.

# normal3d(Nx, Ny, Nz)

    -spec normal3d(Nx :: f(), Ny :: f(), Nz :: f()) -> ok.

Equivalent to `normal3sv/1`.

# normal3dv/1

    -spec normal3dv({Nx :: f(), Ny :: f(), Nz :: f()}) -> ok.

Equivalent to `normal3sv/1`.

# normal3f(Nx, Ny, Nz)

    -spec normal3f(Nx :: f(), Ny :: f(), Nz :: f()) -> ok.

Equivalent to `normal3sv/1`.

# normal3fv/1

    -spec normal3fv({Nx :: f(), Ny :: f(), Nz :: f()}) -> ok.

Equivalent to `normal3sv/1`.

# normal3i(Nx, Ny, Nz)

    -spec normal3i(Nx :: i(), Ny :: i(), Nz :: i()) -> ok.

Equivalent to `normal3sv/1`.

# normal3iv/1

    -spec normal3iv({Nx :: i(), Ny :: i(), Nz :: i()}) -> ok.

Equivalent to `normal3sv/1`.

# normal3s(Nx, Ny, Nz)

    -spec normal3s(Nx :: i(), Ny :: i(), Nz :: i()) -> ok.

Equivalent to `normal3sv/1`.

# normal3sv/1

    -spec normal3sv({Nx :: i(), Ny :: i(), Nz :: i()}) -> ok.

The current normal is set to the given coordinates whenever `gl:normal()` is issued. Byte, short, or integer arguments are converted to floating-point format with a linear mapping that maps the most positive representable integer value to 1.0 and the most negative representable integer value to -1.0.

External documentation.

# normalPointer(Type, Stride, Ptr)

    -spec normalPointer(Type :: enum(), Stride :: i(), Ptr :: offset() | mem()) -> ok.

`gl:normalPointer/3` specifies the location and data format of an array of normals to use when rendering. `Type` specifies the data type of each normal coordinate, and `Stride` specifies the byte stride from one normal to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays. (Single-array storage may be more efficient on some implementations; see `gl:interleavedArrays/3`.)

External documentation.

# objectPtrLabel(Ptr, Length, Label)

    -spec objectPtrLabel(Ptr :: offset() | mem(), Length :: i(), Label :: string()) -> ok.

`gl:objectPtrLabel/3` labels the sync object identified by `Ptr`.

External documentation.

# ortho(Left, Right, Bottom, Top, Near_val, Far_val)

    -spec ortho(Left :: f(), Right :: f(), Bottom :: f(), Top :: f(), Near_val :: f(), Far_val :: f()) -> ok.

`gl:ortho/6` describes a transformation that produces a parallel projection. The current matrix (see `gl:matrixMode/1`) is multiplied by this matrix and the result replaces the current matrix, as if `gl:multMatrix()` were called with the following matrix as its argument:

External documentation.

# passThrough(Token)

    -spec passThrough(Token :: f()) -> ok.

External documentation.

# patchParameterfv(Pname, Values)

    -spec patchParameterfv(Pname :: enum(), Values :: [f()]) -> ok.

Equivalent to `patchParameteri/2`.

# patchParameteri(Pname, Value)

    -spec patchParameteri(Pname :: enum(), Value :: i()) -> ok.

`gl:patchParameter()` specifies the parameters that will be used for patch primitives. `Pname` specifies the parameter to modify and must be either `?GL_PATCH_VERTICES`, `?GL_PATCH_DEFAULT_OUTER_LEVEL` or `?GL_PATCH_DEFAULT_INNER_LEVEL`. For `gl:patchParameteri/2`, `Value` specifies the new value for the parameter specified by `Pname`. For `gl:patchParameterfv/2`, `Values` specifies the address of an array containing the new values for the parameter specified by `Pname`.

External documentation.

# pauseTransformFeedback()

    -spec pauseTransformFeedback() -> ok.

`gl:pauseTransformFeedback/0` pauses transform feedback operations on the currently active transform feedback object. When transform feedback operations are paused, transform feedback is still considered active and changing most transform feedback state related to the object results in an error. However, a new transform feedback object may be bound while transform feedback is paused.

External documentation.

# pixelMapfv(Map, Mapsize, Values)

    -spec pixelMapfv(Map :: enum(), Mapsize :: i(), Values :: binary()) -> ok.

Equivalent to `pixelMapusv/3`.

# pixelMapuiv(Map, Mapsize, Values)

    -spec pixelMapuiv(Map :: enum(), Mapsize :: i(), Values :: binary()) -> ok.

Equivalent to `pixelMapusv/3`.

# pixelMapusv(Map, Mapsize, Values)

    -spec pixelMapusv(Map :: enum(), Mapsize :: i(), Values :: binary()) -> ok.

`gl:pixelMap()` sets up translation tables, or `maps`, used by `gl:copyPixels/5`, `gl:copyTexImage1D/7`, `gl:copyTexImage2D/8`, `gl:copyTexSubImage1D/6`, `gl:copyTexSubImage2D/8`, `gl:copyTexSubImage3D/9`, `gl:drawPixels/5`, `gl:readPixels/7`, `gl:texImage1D/8`, `gl:texImage2D/9`, `gl:texImage3D/10`, `gl:texSubImage1D/7`, `gl:texSubImage2D/9`, and `gl:texSubImage3D/11`. Additionally, if the ARB_imaging subset is supported, the routines `gl:colorTable/6`, `gl:colorSubTable/6`, `gl:convolutionFilter1D/6`, `gl:convolutionFilter2D/7`, `gl:histogram/4`, `gl:minmax/3`, and `gl:separableFilter2D/8`. Use of these maps is described completely in the `gl:pixelTransfer()` reference page, and partly in the reference pages for the pixel and texture image commands. Only the specification of the maps is described in this reference page.

External documentation.

# pixelStoref(Pname, Param)

    -spec pixelStoref(Pname :: enum(), Param :: f()) -> ok.

Equivalent to `pixelStorei/2`.

# pixelStorei(Pname, Param)

    -spec pixelStorei(Pname :: enum(), Param :: i()) -> ok.

`gl:pixelStore()` sets pixel storage modes that affect the operation of subsequent `gl:readPixels/7` as well as the unpacking of texture patterns (see `gl:texImage1D/8`, `gl:texImage2D/9`, `gl:texImage3D/10`, `gl:texSubImage1D/7`, `gl:texSubImage2D/9`, `gl:texSubImage3D/11`), `gl:compressedTexImage1D/7`, `gl:compressedTexImage2D/8`, `gl:compressedTexImage3D/9`, `gl:compressedTexSubImage1D/7`, `gl:compressedTexSubImage2D/9` or `gl:compressedTexSubImage1D/7`.

External documentation.

# pixelTransferf(Pname, Param)

    -spec pixelTransferf(Pname :: enum(), Param :: f()) -> ok.

Equivalent to `pixelTransferi/2`.

# pixelTransferi(Pname, Param)

    -spec pixelTransferi(Pname :: enum(), Param :: i()) -> ok.

`gl:pixelTransfer()` sets pixel transfer modes that affect the operation of subsequent `gl:copyPixels/5`, `gl:copyTexImage1D/7`, `gl:copyTexImage2D/8`, `gl:copyTexSubImage1D/6`, `gl:copyTexSubImage2D/8`, `gl:copyTexSubImage3D/9`, `gl:drawPixels/5`, `gl:readPixels/7`, `gl:texImage1D/8`, `gl:texImage2D/9`, `gl:texImage3D/10`, `gl:texSubImage1D/7`, `gl:texSubImage2D/9`, and `gl:texSubImage3D/11` commands. Additionally, if the ARB_imaging subset is supported, the routines `gl:colorTable/6`, `gl:colorSubTable/6`, `gl:convolutionFilter1D/6`, `gl:convolutionFilter2D/7`, `gl:histogram/4`, `gl:minmax/3`, and `gl:separableFilter2D/8` are also affected. The algorithms that are specified by pixel transfer modes operate on pixels after they are read from the frame buffer (`gl:copyPixels/5` `gl:copyTexImage1D/7`, `gl:copyTexImage2D/8`, `gl:copyTexSubImage1D/6`, `gl:copyTexSubImage2D/8`, `gl:copyTexSubImage3D/9`, and `gl:readPixels/7`), or unpacked from client memory (`gl:drawPixels/5`, `gl:texImage1D/8`, `gl:texImage2D/9`, `gl:texImage3D/10`, `gl:texSubImage1D/7`, `gl:texSubImage2D/9`, and `gl:texSubImage3D/11`). Pixel transfer operations happen in the same order, and in the same manner, regardless of the command that resulted in the pixel operation. Pixel storage modes (see `gl:pixelStore()`) control the unpacking of pixels being read from client memory and the packing of pixels being written back into client memory.

External documentation.

# pixelZoom(Xfactor, Yfactor)

    -spec pixelZoom(Xfactor :: f(), Yfactor :: f()) -> ok.

`gl:pixelZoom/2` specifies values for the x and y zoom factors. During the execution of `gl:drawPixels/5` or `gl:copyPixels/5`, if ( xr, yr) is the current raster position, and a given element is in the mth row and nth column of the pixel rectangle, then pixels whose centers are in the rectangle with corners at

External documentation.

# pointParameterf(Pname, Param)

    -spec pointParameterf(Pname :: enum(), Param :: f()) -> ok.

Equivalent to `pointParameteriv/2`.

# pointParameterfv(Pname, Params)

    -spec pointParameterfv(Pname :: enum(), Params :: tuple()) -> ok.

Equivalent to `pointParameteriv/2`.

# pointParameteri(Pname, Param)

    -spec pointParameteri(Pname :: enum(), Param :: i()) -> ok.

Equivalent to `pointParameteriv/2`.

# pointParameteriv(Pname, Params)

    -spec pointParameteriv(Pname :: enum(), Params :: tuple()) -> ok.

The following values are accepted for `Pname`:

External documentation.

# pointSize(Size)

    -spec pointSize(Size :: f()) -> ok.

`gl:pointSize/1` specifies the rasterized diameter of points. If point size mode is disabled (see `gl:enable/1` with parameter `?GL_PROGRAM_POINT_SIZE`), this value will be used to rasterize points. Otherwise, the value written to the shading language built-in variable gl_PointSize will be used.

External documentation.

# polygonMode(Face, Mode)

    -spec polygonMode(Face :: enum(), Mode :: enum()) -> ok.

`gl:polygonMode/2` controls the interpretation of polygons for rasterization. `Face` describes which polygons `Mode` applies to: both front and back-facing polygons (`?GL_FRONT_AND_BACK`). The polygon mode affects only the final rasterization of polygons. In particular, a polygon's vertices are lit and the polygon is clipped and possibly culled before these modes are applied.

External documentation.

# polygonOffset(Factor, Units)

    -spec polygonOffset(Factor :: f(), Units :: f()) -> ok.

When `?GL_POLYGON_OFFSET_FILL`, `?GL_POLYGON_OFFSET_LINE`, or `?GL_POLYGON_OFFSET_POINT` is enabled, each fragment's `depth` value will be offset after it is interpolated from the `depth` values of the appropriate vertices. The value of the offset is factor×DZ+r×units, where DZ is a measurement of the change in depth relative to the screen area of the polygon, and r is the smallest value that is guaranteed to produce a resolvable offset for a given implementation. The offset is added before the depth test is performed and before the value is written into the depth buffer.

External documentation.

# polygonOffsetClamp(Factor, Units, Clamp)

    -spec polygonOffsetClamp(Factor :: f(), Units :: f(), Clamp :: f()) -> ok.

No documentation available.

# polygonStipple(Mask)

    -spec polygonStipple(Mask :: binary()) -> ok.

Polygon stippling, like line stippling (see `gl:lineStipple/2`), masks out certain fragments produced by rasterization, creating a pattern. Stippling is independent of polygon antialiasing.

External documentation.

# popAttrib()

    -spec popAttrib() -> ok.

Equivalent to `pushAttrib/1`.

# popClientAttrib()

    -spec popClientAttrib() -> ok.

Equivalent to `pushClientAttrib/1`.

# popDebugGroup()

    -spec popDebugGroup() -> ok.

Equivalent to `pushDebugGroup/4`.

# popMatrix()

    -spec popMatrix() -> ok.

Equivalent to `pushMatrix/0`.

# popName()

    -spec popName() -> ok.

Equivalent to `pushName/1`.

# primitiveRestartIndex(Index)

    -spec primitiveRestartIndex(Index :: i()) -> ok.

`gl:primitiveRestartIndex/1` specifies a vertex array element that is treated specially when primitive restarting is enabled. This is known as the primitive restart index.

External documentation.

# prioritizeTextures(Textures, Priorities)

    -spec prioritizeTextures(Textures :: [i()], Priorities :: [clamp()]) -> ok.

`gl:prioritizeTextures/2` assigns the `N` texture priorities given in `Priorities` to the `N` textures named in `Textures`.

External documentation.

# programBinary(Program, BinaryFormat, Binary)

    -spec programBinary(Program :: i(), BinaryFormat :: enum(), Binary :: binary()) -> ok.

`gl:programBinary/3` loads a program object with a program binary previously returned from `gl:getProgramBinary/2`. `BinaryFormat` and `Binary` must be those returned by a previous call to `gl:getProgramBinary/2`, and `Length` must be the length returned by `gl:getProgramBinary/2`, or by `gl:getProgram()` when called with `Pname` set to `?GL_PROGRAM_BINARY_LENGTH`. If these conditions are not met, loading the program binary will fail and `Program`'s `?GL_LINK_STATUS` will be set to `?GL_FALSE`.

External documentation.

# programParameteri(Program, Pname, Value)

    -spec programParameteri(Program :: i(), Pname :: enum(), Value :: i()) -> ok.

`gl:programParameter()` specifies a new value for the parameter nameed by `Pname` for the program object `Program`.

External documentation.

# programUniform1d(Program, Location, V0)

    -spec programUniform1d(Program :: i(), Location :: i(), V0 :: f()) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform1dv(Program, Location, Value)

    -spec programUniform1dv(Program :: i(), Location :: i(), Value :: [f()]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform1f(Program, Location, V0)

    -spec programUniform1f(Program :: i(), Location :: i(), V0 :: f()) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform1fv(Program, Location, Value)

    -spec programUniform1fv(Program :: i(), Location :: i(), Value :: [f()]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform1i(Program, Location, V0)

    -spec programUniform1i(Program :: i(), Location :: i(), V0 :: i()) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform1iv(Program, Location, Value)

    -spec programUniform1iv(Program :: i(), Location :: i(), Value :: [i()]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform1ui(Program, Location, V0)

    -spec programUniform1ui(Program :: i(), Location :: i(), V0 :: i()) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform1uiv(Program, Location, Value)

    -spec programUniform1uiv(Program :: i(), Location :: i(), Value :: [i()]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform2d(Program, Location, V0, V1)

    -spec programUniform2d(Program :: i(), Location :: i(), V0 :: f(), V1 :: f()) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform2dv(Program, Location, Value)

    -spec programUniform2dv(Program :: i(), Location :: i(), Value :: [{f(), f()}]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform2f(Program, Location, V0, V1)

    -spec programUniform2f(Program :: i(), Location :: i(), V0 :: f(), V1 :: f()) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform2fv(Program, Location, Value)

    -spec programUniform2fv(Program :: i(), Location :: i(), Value :: [{f(), f()}]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform2i(Program, Location, V0, V1)

    -spec programUniform2i(Program :: i(), Location :: i(), V0 :: i(), V1 :: i()) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform2iv(Program, Location, Value)

    -spec programUniform2iv(Program :: i(), Location :: i(), Value :: [{i(), i()}]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform2ui(Program, Location, V0, V1)

    -spec programUniform2ui(Program :: i(), Location :: i(), V0 :: i(), V1 :: i()) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform2uiv(Program, Location, Value)

    -spec programUniform2uiv(Program :: i(), Location :: i(), Value :: [{i(), i()}]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform3d(Program, Location, V0, V1, V2)

    -spec programUniform3d(Program :: i(), Location :: i(), V0 :: f(), V1 :: f(), V2 :: f()) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform3dv(Program, Location, Value)

    -spec programUniform3dv(Program :: i(), Location :: i(), Value :: [{f(), f(), f()}]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform3f(Program, Location, V0, V1, V2)

    -spec programUniform3f(Program :: i(), Location :: i(), V0 :: f(), V1 :: f(), V2 :: f()) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform3fv(Program, Location, Value)

    -spec programUniform3fv(Program :: i(), Location :: i(), Value :: [{f(), f(), f()}]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform3i(Program, Location, V0, V1, V2)

    -spec programUniform3i(Program :: i(), Location :: i(), V0 :: i(), V1 :: i(), V2 :: i()) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform3iv(Program, Location, Value)

    -spec programUniform3iv(Program :: i(), Location :: i(), Value :: [{i(), i(), i()}]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform3ui(Program, Location, V0, V1, V2)

    -spec programUniform3ui(Program :: i(), Location :: i(), V0 :: i(), V1 :: i(), V2 :: i()) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform3uiv(Program, Location, Value)

    -spec programUniform3uiv(Program :: i(), Location :: i(), Value :: [{i(), i(), i()}]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform4d(Program, Location, V0, V1, V2, V3)

    -spec programUniform4d(Program :: i(), Location :: i(), V0 :: f(), V1 :: f(), V2 :: f(), V3 :: f()) ->
                              ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform4dv(Program, Location, Value)

    -spec programUniform4dv(Program :: i(), Location :: i(), Value :: [{f(), f(), f(), f()}]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform4f(Program, Location, V0, V1, V2, V3)

    -spec programUniform4f(Program :: i(), Location :: i(), V0 :: f(), V1 :: f(), V2 :: f(), V3 :: f()) ->
                              ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform4fv(Program, Location, Value)

    -spec programUniform4fv(Program :: i(), Location :: i(), Value :: [{f(), f(), f(), f()}]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform4i(Program, Location, V0, V1, V2, V3)

    -spec programUniform4i(Program :: i(), Location :: i(), V0 :: i(), V1 :: i(), V2 :: i(), V3 :: i()) ->
                              ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform4iv(Program, Location, Value)

    -spec programUniform4iv(Program :: i(), Location :: i(), Value :: [{i(), i(), i(), i()}]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform4ui(Program, Location, V0, V1, V2, V3)

    -spec programUniform4ui(Program :: i(), Location :: i(), V0 :: i(), V1 :: i(), V2 :: i(), V3 :: i()) ->
                               ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniform4uiv(Program, Location, Value)

    -spec programUniform4uiv(Program :: i(), Location :: i(), Value :: [{i(), i(), i(), i()}]) -> ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix2dv(Program, Location, Transpose, Value)

    -spec programUniformMatrix2dv(Program :: i(),
                                  Location :: i(),
                                  Transpose :: 0 | 1,
                                  Value :: [{f(), f(), f(), f()}]) ->
                                     ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix2fv(Program, Location, Transpose, Value)

    -spec programUniformMatrix2fv(Program :: i(),
                                  Location :: i(),
                                  Transpose :: 0 | 1,
                                  Value :: [{f(), f(), f(), f()}]) ->
                                     ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix2x3dv(Program, Location, Transpose, Value)

    -spec programUniformMatrix2x3dv(Program :: i(),
                                    Location :: i(),
                                    Transpose :: 0 | 1,
                                    Value :: [{f(), f(), f(), f(), f(), f()}]) ->
                                       ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix2x3fv(Program, Location, Transpose, Value)

    -spec programUniformMatrix2x3fv(Program :: i(),
                                    Location :: i(),
                                    Transpose :: 0 | 1,
                                    Value :: [{f(), f(), f(), f(), f(), f()}]) ->
                                       ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix2x4dv(Program, Location, Transpose, Value)

    -spec programUniformMatrix2x4dv(Program, Location, Transpose, Value) -> ok
                                       when
                                           Program :: i(),
                                           Location :: i(),
                                           Transpose :: 0 | 1,
                                           Value :: [{f(), f(), f(), f(), f(), f(), f(), f()}].

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix2x4fv(Program, Location, Transpose, Value)

    -spec programUniformMatrix2x4fv(Program, Location, Transpose, Value) -> ok
                                       when
                                           Program :: i(),
                                           Location :: i(),
                                           Transpose :: 0 | 1,
                                           Value :: [{f(), f(), f(), f(), f(), f(), f(), f()}].

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix3dv(Program, Location, Transpose, Value)

    -spec programUniformMatrix3dv(Program, Location, Transpose, Value) -> ok
                                     when
                                         Program :: i(),
                                         Location :: i(),
                                         Transpose :: 0 | 1,
                                         Value :: [{f(), f(), f(), f(), f(), f(), f(), f(), f()}].

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix3fv(Program, Location, Transpose, Value)

    -spec programUniformMatrix3fv(Program, Location, Transpose, Value) -> ok
                                     when
                                         Program :: i(),
                                         Location :: i(),
                                         Transpose :: 0 | 1,
                                         Value :: [{f(), f(), f(), f(), f(), f(), f(), f(), f()}].

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix3x2dv(Program, Location, Transpose, Value)

    -spec programUniformMatrix3x2dv(Program :: i(),
                                    Location :: i(),
                                    Transpose :: 0 | 1,
                                    Value :: [{f(), f(), f(), f(), f(), f()}]) ->
                                       ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix3x2fv(Program, Location, Transpose, Value)

    -spec programUniformMatrix3x2fv(Program :: i(),
                                    Location :: i(),
                                    Transpose :: 0 | 1,
                                    Value :: [{f(), f(), f(), f(), f(), f()}]) ->
                                       ok.

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix3x4dv(Program, Location, Transpose, Value)

    -spec programUniformMatrix3x4dv(Program, Location, Transpose, Value) -> ok
                                       when
                                           Program :: i(),
                                           Location :: i(),
                                           Transpose :: 0 | 1,
                                           Value ::
                                               [{f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f()}].

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix3x4fv(Program, Location, Transpose, Value)

    -spec programUniformMatrix3x4fv(Program, Location, Transpose, Value) -> ok
                                       when
                                           Program :: i(),
                                           Location :: i(),
                                           Transpose :: 0 | 1,
                                           Value ::
                                               [{f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f()}].

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix4dv(Program, Location, Transpose, Value)

    -spec programUniformMatrix4dv(Program, Location, Transpose, Value) -> ok
                                     when
                                         Program :: i(),
                                         Location :: i(),
                                         Transpose :: 0 | 1,
                                         Value ::
                                             [{f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f()}].

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix4fv(Program, Location, Transpose, Value)

    -spec programUniformMatrix4fv(Program, Location, Transpose, Value) -> ok
                                     when
                                         Program :: i(),
                                         Location :: i(),
                                         Transpose :: 0 | 1,
                                         Value ::
                                             [{f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f(),
                                               f()}].

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix4x2dv(Program, Location, Transpose, Value)

    -spec programUniformMatrix4x2dv(Program, Location, Transpose, Value) -> ok
                                       when
                                           Program :: i(),
                                           Location :: i(),
                                           Transpose :: 0 | 1,
                                           Value :: [{f(), f(), f(), f(), f(), f(), f(), f()}].

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix4x2fv(Program, Location, Transpose, Value)

    -spec programUniformMatrix4x2fv(Program, Location, Transpose, Value) -> ok
                                       when
                                           Program :: i(),
                                           Location :: i(),
                                           Transpose :: 0 | 1,
                                           Value :: [{f(), f(), f(), f(), f(), f(), f(), f()}].

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix4x3dv(Program, Location, Transpose, Value)

    -spec programUniformMatrix4x3dv(Program, Location, Transpose, Value) -> ok
                                       when
                                           Program :: i(),
                                           Location :: i(),
                                           Transpose :: 0 | 1,
                                           Value ::
                                               [{f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f()}].

Equivalent to `programUniformMatrix4x3fv/4`.

# programUniformMatrix4x3fv(Program, Location, Transpose, Value)

    -spec programUniformMatrix4x3fv(Program, Location, Transpose, Value) -> ok
                                       when
                                           Program :: i(),
                                           Location :: i(),
                                           Transpose :: 0 | 1,
                                           Value ::
                                               [{f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f()}].

`gl:programUniform()` modifies the value of a uniform variable or a uniform variable array. The location of the uniform variable to be modified is specified by `Location`, which should be a value returned by `gl:getUniformLocation/2`. `gl:programUniform()` operates on the program object specified by `Program`.

External documentation.

# provokingVertex(Mode)

    -spec provokingVertex(Mode :: enum()) -> ok.

`Flatshading` a vertex shader varying output means to assign all vetices of the primitive the same value for that output. The vertex from which these values is derived is known as the `provoking vertex` and `gl:provokingVertex/1` specifies which vertex is to be used as the source of data for flat shaded varyings.

External documentation.

# pushAttrib(Mask)

    -spec pushAttrib(Mask :: i()) -> ok.

`gl:pushAttrib/1` takes one argument, a mask that indicates which groups of state variables to save on the attribute stack. Symbolic constants are used to set bits in the mask. `Mask` is typically constructed by specifying the bitwise-or of several of these constants together. The special mask `?GL_ALL_ATTRIB_BITS` can be used to save all stackable states.

External documentation.

# pushClientAttrib(Mask)

    -spec pushClientAttrib(Mask :: i()) -> ok.

`gl:pushClientAttrib/1` takes one argument, a mask that indicates which groups of client-state variables to save on the client attribute stack. Symbolic constants are used to set bits in the mask. `Mask` is typically constructed by specifying the bitwise-or of several of these constants together. The special mask `?GL_CLIENT_ALL_ATTRIB_BITS` can be used to save all stackable client state.

External documentation.

# pushDebugGroup(Source, Id, Length, Message)

    -spec pushDebugGroup(Source :: enum(), Id :: i(), Length :: i(), Message :: string()) -> ok.

`gl:pushDebugGroup/4` pushes a debug group described by the string `Message` into the command stream. The value of `Id` specifies the ID of messages generated. The parameter `Length` contains the number of characters in `Message`. If `Length` is negative, it is implied that `Message` contains a null terminated string. The message has the specified `Source` and `Id`, the `Type``?GL_DEBUG_TYPE_PUSH_GROUP`, and `Severity``?GL_DEBUG_SEVERITY_NOTIFICATION`. The GL will put a new debug group on top of the debug group stack which inherits the control of the volume of debug output of the debug group previously residing on the top of the debug group stack. Because debug groups are strictly hierarchical, any additional control of the debug output volume will only apply within the active debug group and the debug groups pushed on top of the active debug group.

External documentation.

# pushMatrix()

    -spec pushMatrix() -> ok.

There is a stack of matrices for each of the matrix modes. In `?GL_MODELVIEW` mode, the stack depth is at least 32. In the other modes, `?GL_COLOR`, `?GL_PROJECTION`, and `?GL_TEXTURE`, the depth is at least 2. The current matrix in any mode is the matrix on the top of the stack for that mode.

External documentation.

# pushName(Name)

    -spec pushName(Name :: i()) -> ok.

The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers and is initially empty.

External documentation.

# queryCounter(Id, Target)

    -spec queryCounter(Id :: i(), Target :: enum()) -> ok.

`gl:queryCounter/2` causes the GL to record the current time into the query object named `Id`. `Target` must be `?GL_TIMESTAMP`. The time is recorded after all previous commands on the GL client and server state and the framebuffer have been fully realized. When the time is recorded, the query result for that object is marked available. `gl:queryCounter/2` timer queries can be used within a `gl:beginQuery/2` / `gl:endQuery/1` block where the target is `?GL_TIME_ELAPSED` and it does not affect the result of that query object.

External documentation.

# rasterPos2d(X, Y)

    -spec rasterPos2d(X :: f(), Y :: f()) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos2dv/1

    -spec rasterPos2dv({X :: f(), Y :: f()}) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos2f(X, Y)

    -spec rasterPos2f(X :: f(), Y :: f()) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos2fv/1

    -spec rasterPos2fv({X :: f(), Y :: f()}) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos2i(X, Y)

    -spec rasterPos2i(X :: i(), Y :: i()) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos2iv/1

    -spec rasterPos2iv({X :: i(), Y :: i()}) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos2s(X, Y)

    -spec rasterPos2s(X :: i(), Y :: i()) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos2sv/1

    -spec rasterPos2sv({X :: i(), Y :: i()}) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos3d(X, Y, Z)

    -spec rasterPos3d(X :: f(), Y :: f(), Z :: f()) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos3dv/1

    -spec rasterPos3dv({X :: f(), Y :: f(), Z :: f()}) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos3f(X, Y, Z)

    -spec rasterPos3f(X :: f(), Y :: f(), Z :: f()) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos3fv/1

    -spec rasterPos3fv({X :: f(), Y :: f(), Z :: f()}) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos3i(X, Y, Z)

    -spec rasterPos3i(X :: i(), Y :: i(), Z :: i()) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos3iv/1

    -spec rasterPos3iv({X :: i(), Y :: i(), Z :: i()}) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos3s(X, Y, Z)

    -spec rasterPos3s(X :: i(), Y :: i(), Z :: i()) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos3sv/1

    -spec rasterPos3sv({X :: i(), Y :: i(), Z :: i()}) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos4d(X, Y, Z, W)

    -spec rasterPos4d(X :: f(), Y :: f(), Z :: f(), W :: f()) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos4dv/1

    -spec rasterPos4dv({X :: f(), Y :: f(), Z :: f(), W :: f()}) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos4f(X, Y, Z, W)

    -spec rasterPos4f(X :: f(), Y :: f(), Z :: f(), W :: f()) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos4fv/1

    -spec rasterPos4fv({X :: f(), Y :: f(), Z :: f(), W :: f()}) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos4i(X, Y, Z, W)

    -spec rasterPos4i(X :: i(), Y :: i(), Z :: i(), W :: i()) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos4iv/1

    -spec rasterPos4iv({X :: i(), Y :: i(), Z :: i(), W :: i()}) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos4s(X, Y, Z, W)

    -spec rasterPos4s(X :: i(), Y :: i(), Z :: i(), W :: i()) -> ok.

Equivalent to `rasterPos4sv/1`.

# rasterPos4sv/1

    -spec rasterPos4sv({X :: i(), Y :: i(), Z :: i(), W :: i()}) -> ok.

The GL maintains a 3D position in window coordinates. This position, called the raster position, is used to position pixel and bitmap write operations. It is maintained with subpixel accuracy. See `gl:bitmap/7`, `gl:drawPixels/5`, and `gl:copyPixels/5`.

External documentation.

# readBuffer(Mode)

    -spec readBuffer(Mode :: enum()) -> ok.

`gl:readBuffer/1` specifies a color buffer as the source for subsequent `gl:readPixels/7`, `gl:copyTexImage1D/7`, `gl:copyTexImage2D/8`, `gl:copyTexSubImage1D/6`, `gl:copyTexSubImage2D/8`, and `gl:copyTexSubImage3D/9` commands. `Mode` accepts one of twelve or more predefined values. In a fully configured system, `?GL_FRONT`, `?GL_LEFT`, and `?GL_FRONT_LEFT` all name the front left buffer, `?GL_FRONT_RIGHT` and `?GL_RIGHT` name the front right buffer, and `?GL_BACK_LEFT` and `?GL_BACK` name the back left buffer. Further more, the constants `?GL_COLOR_ATTACHMENT``i` may be used to indicate the `i`th color attachment where `i` ranges from zero to the value of `?GL_MAX_COLOR_ATTACHMENTS` minus one.

External documentation.

# readPixels(X, Y, Width, Height, Format, Type, Pixels)

    -spec readPixels(X, Y, Width, Height, Format, Type, Pixels) -> ok
                        when
                            X :: i(),
                            Y :: i(),
                            Width :: i(),
                            Height :: i(),
                            Format :: enum(),
                            Type :: enum(),
                            Pixels :: mem().

`gl:readPixels/7` and `glReadnPixels` return pixel data from the frame buffer, starting with the pixel whose lower left corner is at location (`X`, `Y`), into client memory starting at location `Data`. Several parameters control the processing of the pixel data before it is placed into client memory. These parameters are set with `gl:pixelStore()`. This reference page describes the effects on `gl:readPixels/7` and `glReadnPixels` of most, but not all of the parameters specified by these three commands.

External documentation.

# rectd(X1, Y1, X2, Y2)

    -spec rectd(X1 :: f(), Y1 :: f(), X2 :: f(), Y2 :: f()) -> ok.

Equivalent to `rectsv/2`.

# rectdv(V1, V2)

    -spec rectdv(V1 :: {f(), f()}, V2 :: {f(), f()}) -> ok.

Equivalent to `rectsv/2`.

# rectf(X1, Y1, X2, Y2)

    -spec rectf(X1 :: f(), Y1 :: f(), X2 :: f(), Y2 :: f()) -> ok.

Equivalent to `rectsv/2`.

# rectfv(V1, V2)

    -spec rectfv(V1 :: {f(), f()}, V2 :: {f(), f()}) -> ok.

Equivalent to `rectsv/2`.

# recti(X1, Y1, X2, Y2)

    -spec recti(X1 :: i(), Y1 :: i(), X2 :: i(), Y2 :: i()) -> ok.

Equivalent to `rectsv/2`.

# rectiv(V1, V2)

    -spec rectiv(V1 :: {i(), i()}, V2 :: {i(), i()}) -> ok.

Equivalent to `rectsv/2`.

# rects(X1, Y1, X2, Y2)

    -spec rects(X1 :: i(), Y1 :: i(), X2 :: i(), Y2 :: i()) -> ok.

Equivalent to `rectsv/2`.

# rectsv(V1, V2)

    -spec rectsv(V1 :: {i(), i()}, V2 :: {i(), i()}) -> ok.

`gl:rect()` supports efficient specification of rectangles as two corner points. Each rectangle command takes four arguments, organized either as two consecutive pairs of (x y) coordinates or as two pointers to arrays, each containing an (x y) pair. The resulting rectangle is defined in the z=0 plane.

External documentation.

# releaseShaderCompiler()

    -spec releaseShaderCompiler() -> ok.

`gl:releaseShaderCompiler/0` provides a hint to the implementation that it may free internal resources associated with its shader compiler. `gl:compileShader/1` may subsequently be called and the implementation may at that time reallocate resources previously freed by the call to `gl:releaseShaderCompiler/0`.

External documentation.

# renderbufferStorage(Target, Internalformat, Width, Height)

    -spec renderbufferStorage(Target :: enum(), Internalformat :: enum(), Width :: i(), Height :: i()) -> ok.

`gl:renderbufferStorage/4` is equivalent to calling `gl:renderbufferStorageMultisample/5` with the `Samples` set to zero, and `glNamedRenderbufferStorage` is equivalent to calling `glNamedRenderbufferStorageMultisample` with the samples set to zero.

External documentation.

# renderbufferStorageMultisample(Target, Samples, Internalformat, Width, Height)

    -spec renderbufferStorageMultisample(Target :: enum(),
                                         Samples :: i(),
                                         Internalformat :: enum(),
                                         Width :: i(),
                                         Height :: i()) ->
                                            ok.

`gl:renderbufferStorageMultisample/5` and `glNamedRenderbufferStorageMultisample` establish the data storage, format, dimensions and number of samples of a renderbuffer object's image.

External documentation.

# renderMode(Mode)

    -spec renderMode(Mode :: enum()) -> i().

`gl:renderMode/1` sets the rasterization mode. It takes one argument, `Mode`, which can assume one of three predefined values:

External documentation.

# resetHistogram(Target)

    -spec resetHistogram(Target :: enum()) -> ok.

`gl:resetHistogram/1` resets all the elements of the current histogram table to zero.

External documentation.

# resetMinmax(Target)

    -spec resetMinmax(Target :: enum()) -> ok.

`gl:resetMinmax/1` resets the elements of the current minmax table to their initial values: the ``maximum'' element receives the minimum possible component values, and the ``minimum'' element receives the maximum possible component values.

External documentation.

# resumeTransformFeedback()

    -spec resumeTransformFeedback() -> ok.

`gl:resumeTransformFeedback/0` resumes transform feedback operations on the currently active transform feedback object. When transform feedback operations are paused, transform feedback is still considered active and changing most transform feedback state related to the object results in an error. However, a new transform feedback object may be bound while transform feedback is paused.

External documentation.

# rotated(Angle, X, Y, Z)

    -spec rotated(Angle :: f(), X :: f(), Y :: f(), Z :: f()) -> ok.

Equivalent to `rotatef/4`.

# rotatef(Angle, X, Y, Z)

    -spec rotatef(Angle :: f(), X :: f(), Y :: f(), Z :: f()) -> ok.

`gl:rotate()` produces a rotation of `Angle` degrees around the vector (x y z). The current matrix (see `gl:matrixMode/1`) is multiplied by a rotation matrix with the product replacing the current matrix, as if `gl:multMatrix()` were called with the following matrix as its argument:

External documentation.

# sampleCoverage(Value, Invert)

    -spec sampleCoverage(Value :: clamp(), Invert :: 0 | 1) -> ok.

Multisampling samples a pixel multiple times at various implementation-dependent subpixel locations to generate antialiasing effects. Multisampling transparently antialiases points, lines, polygons, and images if it is enabled.

External documentation.

# sampleMaski(MaskNumber, Mask)

    -spec sampleMaski(MaskNumber :: i(), Mask :: i()) -> ok.

`gl:sampleMaski/2` sets one 32-bit sub-word of the multi-word sample mask, `?GL_SAMPLE_MASK_VALUE`.

External documentation.

# samplerParameterf(Sampler, Pname, Param)

    -spec samplerParameterf(Sampler :: i(), Pname :: enum(), Param :: f()) -> ok.

Equivalent to `samplerParameteriv/3`.

# samplerParameterfv(Sampler, Pname, Param)

    -spec samplerParameterfv(Sampler :: i(), Pname :: enum(), Param :: [f()]) -> ok.

Equivalent to `samplerParameteriv/3`.

# samplerParameterIiv(Sampler, Pname, Param)

    -spec samplerParameterIiv(Sampler :: i(), Pname :: enum(), Param :: [i()]) -> ok.

Equivalent to `samplerParameteriv/3`.

# samplerParameterIuiv(Sampler, Pname, Param)

    -spec samplerParameterIuiv(Sampler :: i(), Pname :: enum(), Param :: [i()]) -> ok.

Equivalent to `samplerParameteriv/3`.

# samplerParameteri(Sampler, Pname, Param)

    -spec samplerParameteri(Sampler :: i(), Pname :: enum(), Param :: i()) -> ok.

Equivalent to `samplerParameteriv/3`.

# samplerParameteriv(Sampler, Pname, Param)

    -spec samplerParameteriv(Sampler :: i(), Pname :: enum(), Param :: [i()]) -> ok.

`gl:samplerParameter()` assigns the value or values in `Params` to the sampler parameter specified as `Pname`. `Sampler` specifies the sampler object to be modified, and must be the name of a sampler object previously returned from a call to `gl:genSamplers/1`. The following symbols are accepted in `Pname`:

External documentation.

# scaled(X, Y, Z)

    -spec scaled(X :: f(), Y :: f(), Z :: f()) -> ok.

Equivalent to `scalef/3`.

# scalef(X, Y, Z)

    -spec scalef(X :: f(), Y :: f(), Z :: f()) -> ok.

`gl:scale()` produces a nonuniform scaling along the `x`, `y`, and `z` axes. The three parameters indicate the desired scale factor along each of the three axes.

External documentation.

# scissor(X, Y, Width, Height)

    -spec scissor(X :: i(), Y :: i(), Width :: i(), Height :: i()) -> ok.

`gl:scissor/4` defines a rectangle, called the scissor box, in window coordinates. The first two arguments, `X` and `Y`, specify the lower left corner of the box. `Width` and `Height` specify the width and height of the box.

External documentation.

# scissorArrayv(First, V)

    -spec scissorArrayv(First :: i(), V :: [{i(), i(), i(), i()}]) -> ok.

`gl:scissorArrayv/2` defines rectangles, called scissor boxes, in window coordinates for each viewport. `First` specifies the index of the first scissor box to modify and `Count` specifies the number of scissor boxes to modify. `First` must be less than the value of `?GL_MAX_VIEWPORTS`, and `First` + `Count` must be less than or equal to the value of `?GL_MAX_VIEWPORTS`. `V` specifies the address of an array containing integers specifying the lower left corner of the scissor boxes, and the width and height of the scissor boxes, in that order.

External documentation.

# scissorIndexed(Index, Left, Bottom, Width, Height)

    -spec scissorIndexed(Index :: i(), Left :: i(), Bottom :: i(), Width :: i(), Height :: i()) -> ok.

Equivalent to `scissorIndexedv/2`.

# scissorIndexedv(Index, V)

    -spec scissorIndexedv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

`gl:scissorIndexed/5` defines the scissor box for a specified viewport. `Index` specifies the index of scissor box to modify. `Index` must be less than the value of `?GL_MAX_VIEWPORTS`. For `gl:scissorIndexed/5`, `Left`, `Bottom`, `Width` and `Height` specify the left, bottom, width and height of the scissor box, in pixels, respectively. For `gl:scissorIndexedv/2`, `V` specifies the address of an array containing integers specifying the lower left corner of the scissor box, and the width and height of the scissor box, in that order.

External documentation.

# secondaryColor3b(Red, Green, Blue)

    -spec secondaryColor3b(Red :: i(), Green :: i(), Blue :: i()) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3bv/1

    -spec secondaryColor3bv({Red :: i(), Green :: i(), Blue :: i()}) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3d(Red, Green, Blue)

    -spec secondaryColor3d(Red :: f(), Green :: f(), Blue :: f()) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3dv/1

    -spec secondaryColor3dv({Red :: f(), Green :: f(), Blue :: f()}) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3f(Red, Green, Blue)

    -spec secondaryColor3f(Red :: f(), Green :: f(), Blue :: f()) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3fv/1

    -spec secondaryColor3fv({Red :: f(), Green :: f(), Blue :: f()}) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3i(Red, Green, Blue)

    -spec secondaryColor3i(Red :: i(), Green :: i(), Blue :: i()) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3iv/1

    -spec secondaryColor3iv({Red :: i(), Green :: i(), Blue :: i()}) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3s(Red, Green, Blue)

    -spec secondaryColor3s(Red :: i(), Green :: i(), Blue :: i()) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3sv/1

    -spec secondaryColor3sv({Red :: i(), Green :: i(), Blue :: i()}) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3ub(Red, Green, Blue)

    -spec secondaryColor3ub(Red :: i(), Green :: i(), Blue :: i()) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3ubv/1

    -spec secondaryColor3ubv({Red :: i(), Green :: i(), Blue :: i()}) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3ui(Red, Green, Blue)

    -spec secondaryColor3ui(Red :: i(), Green :: i(), Blue :: i()) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3uiv/1

    -spec secondaryColor3uiv({Red :: i(), Green :: i(), Blue :: i()}) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3us(Red, Green, Blue)

    -spec secondaryColor3us(Red :: i(), Green :: i(), Blue :: i()) -> ok.

Equivalent to `secondaryColor3usv/1`.

# secondaryColor3usv/1

    -spec secondaryColor3usv({Red :: i(), Green :: i(), Blue :: i()}) -> ok.

The GL stores both a primary four-valued RGBA color and a secondary four-valued RGBA color (where alpha is always set to 0.0) that is associated with every vertex.

External documentation.

# secondaryColorPointer(Size, Type, Stride, Pointer)

    -spec secondaryColorPointer(Size :: i(), Type :: enum(), Stride :: i(), Pointer :: offset() | mem()) ->
                                   ok.

`gl:secondaryColorPointer/4` specifies the location and data format of an array of color components to use when rendering. `Size` specifies the number of components per color, and must be 3. `Type` specifies the data type of each color component, and `Stride` specifies the byte stride from one color to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays.

External documentation.

# selectBuffer(Size, Buffer)

    -spec selectBuffer(Size :: i(), Buffer :: mem()) -> ok.

`gl:selectBuffer/2` has two arguments: `Buffer` is a pointer to an array of unsigned integers, and `Size` indicates the size of the array. `Buffer` returns values from the name stack (see `gl:initNames/0`, `gl:loadName/1`, `gl:pushName/1`) when the rendering mode is `?GL_SELECT` (see `gl:renderMode/1`). `gl:selectBuffer/2` must be issued before selection mode is enabled, and it must not be issued while the rendering mode is `?GL_SELECT`.

External documentation.

# separableFilter2D(Target, Internalformat, Width, Height, Format, Type, Row, Column)

    -spec separableFilter2D(Target, Internalformat, Width, Height, Format, Type, Row, Column) -> ok
                               when
                                   Target :: enum(),
                                   Internalformat :: enum(),
                                   Width :: i(),
                                   Height :: i(),
                                   Format :: enum(),
                                   Type :: enum(),
                                   Row :: offset() | mem(),
                                   Column :: offset() | mem().

`gl:separableFilter2D/8` builds a two-dimensional separable convolution filter kernel from two arrays of pixels.

External documentation.

# shadeModel(Mode)

    -spec shadeModel(Mode :: enum()) -> ok.

GL primitives can have either flat or smooth shading. Smooth shading, the default, causes the computed colors of vertices to be interpolated as the primitive is rasterized, typically assigning different colors to each resulting pixel fragment. Flat shading selects the computed color of just one vertex and assigns it to all the pixel fragments generated by rasterizing a single primitive. In either case, the computed color of a vertex is the result of lighting if lighting is enabled, or it is the current color at the time the vertex was specified if lighting is disabled.

External documentation.

# shaderBinary(Shaders, Binaryformat, Binary)

    -spec shaderBinary(Shaders :: [i()], Binaryformat :: enum(), Binary :: binary()) -> ok.

`gl:shaderBinary/3` loads pre-compiled shader binary code into the `Count` shader objects whose handles are given in `Shaders`. `Binary` points to `Length` bytes of binary shader code stored in client memory. `BinaryFormat` specifies the format of the pre-compiled code.

External documentation.

# shaderSource(Shader, String)

    -spec shaderSource(Shader :: i(), String :: [unicode:chardata()]) -> ok.

`gl:shaderSource/2` sets the source code in `Shader` to the source code in the array of strings specified by `String`. Any source code previously stored in the shader object is completely replaced. The number of strings in the array is specified by `Count`. If `Length` is `?NULL`, each string is assumed to be null terminated. If `Length` is a value other than `?NULL`, it points to an array containing a string length for each of the corresponding elements of `String`. Each element in the `Length` array may contain the length of the corresponding string (the null character is not counted as part of the string length) or a value less than 0 to indicate that the string is null terminated. The source code strings are not scanned or parsed at this time; they are simply copied into the specified shader object.

External documentation.

# shaderStorageBlockBinding(Program, StorageBlockIndex, StorageBlockBinding)

    -spec shaderStorageBlockBinding(Program :: i(), StorageBlockIndex :: i(), StorageBlockBinding :: i()) ->
                                       ok.

`gl:shaderStorageBlockBinding/3`, changes the active shader storage block with an assigned index of `StorageBlockIndex` in program object `Program`. `StorageBlockIndex` must be an active shader storage block index in `Program`. `StorageBlockBinding` must be less than the value of `?GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS`. If successful, `gl:shaderStorageBlockBinding/3` specifies that `Program` will use the data store of the buffer object bound to the binding point `StorageBlockBinding` to read and write the values of the buffer variables in the shader storage block identified by `StorageBlockIndex`.

External documentation.

# stencilFunc(Func, Ref, Mask)

    -spec stencilFunc(Func :: enum(), Ref :: i(), Mask :: i()) -> ok.

Stenciling, like depth-buffering, enables and disables drawing on a per-pixel basis. Stencil planes are first drawn into using GL drawing primitives, then geometry and images are rendered using the stencil planes to mask out portions of the screen. Stenciling is typically used in multipass rendering algorithms to achieve special effects, such as decals, outlining, and constructive solid geometry rendering.

External documentation.

# stencilFuncSeparate(Face, Func, Ref, Mask)

    -spec stencilFuncSeparate(Face :: enum(), Func :: enum(), Ref :: i(), Mask :: i()) -> ok.

Stenciling, like depth-buffering, enables and disables drawing on a per-pixel basis. You draw into the stencil planes using GL drawing primitives, then render geometry and images, using the stencil planes to mask out portions of the screen. Stenciling is typically used in multipass rendering algorithms to achieve special effects, such as decals, outlining, and constructive solid geometry rendering.

External documentation.

# stencilMask(Mask)

    -spec stencilMask(Mask :: i()) -> ok.

`gl:stencilMask/1` controls the writing of individual bits in the stencil planes. The least significant n bits of `Mask`, where n is the number of bits in the stencil buffer, specify a mask. Where a 1 appears in the mask, it's possible to write to the corresponding bit in the stencil buffer. Where a 0 appears, the corresponding bit is write-protected. Initially, all bits are enabled for writing.

External documentation.

# stencilMaskSeparate(Face, Mask)

    -spec stencilMaskSeparate(Face :: enum(), Mask :: i()) -> ok.

`gl:stencilMaskSeparate/2` controls the writing of individual bits in the stencil planes. The least significant n bits of `Mask`, where n is the number of bits in the stencil buffer, specify a mask. Where a 1 appears in the mask, it's possible to write to the corresponding bit in the stencil buffer. Where a 0 appears, the corresponding bit is write-protected. Initially, all bits are enabled for writing.

External documentation.

# stencilOp(Fail, Zfail, Zpass)

    -spec stencilOp(Fail :: enum(), Zfail :: enum(), Zpass :: enum()) -> ok.

Stenciling, like depth-buffering, enables and disables drawing on a per-pixel basis. You draw into the stencil planes using GL drawing primitives, then render geometry and images, using the stencil planes to mask out portions of the screen. Stenciling is typically used in multipass rendering algorithms to achieve special effects, such as decals, outlining, and constructive solid geometry rendering.

External documentation.

# stencilOpSeparate(Face, Sfail, Dpfail, Dppass)

    -spec stencilOpSeparate(Face :: enum(), Sfail :: enum(), Dpfail :: enum(), Dppass :: enum()) -> ok.

Stenciling, like depth-buffering, enables and disables drawing on a per-pixel basis. You draw into the stencil planes using GL drawing primitives, then render geometry and images, using the stencil planes to mask out portions of the screen. Stenciling is typically used in multipass rendering algorithms to achieve special effects, such as decals, outlining, and constructive solid geometry rendering.

External documentation.

# texBuffer(Target, Internalformat, Buffer)

    -spec texBuffer(Target :: enum(), Internalformat :: enum(), Buffer :: i()) -> ok.

Equivalent to `textureBuffer/3`.

# texBufferRange(Target, Internalformat, Buffer, Offset, Size)

    -spec texBufferRange(Target :: enum(),
                         Internalformat :: enum(),
                         Buffer :: i(),
                         Offset :: i(),
                         Size :: i()) ->
                            ok.

Equivalent to `textureBufferRange/5`.

# texCoord1d(S)

    -spec texCoord1d(S :: f()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord1dv/1

    -spec texCoord1dv({S :: f()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord1f(S)

    -spec texCoord1f(S :: f()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord1fv/1

    -spec texCoord1fv({S :: f()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord1i(S)

    -spec texCoord1i(S :: i()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord1iv/1

    -spec texCoord1iv({S :: i()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord1s(S)

    -spec texCoord1s(S :: i()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord1sv/1

    -spec texCoord1sv({S :: i()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord2d(S, T)

    -spec texCoord2d(S :: f(), T :: f()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord2dv/1

    -spec texCoord2dv({S :: f(), T :: f()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord2f(S, T)

    -spec texCoord2f(S :: f(), T :: f()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord2fv/1

    -spec texCoord2fv({S :: f(), T :: f()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord2i(S, T)

    -spec texCoord2i(S :: i(), T :: i()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord2iv/1

    -spec texCoord2iv({S :: i(), T :: i()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord2s(S, T)

    -spec texCoord2s(S :: i(), T :: i()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord2sv/1

    -spec texCoord2sv({S :: i(), T :: i()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord3d(S, T, R)

    -spec texCoord3d(S :: f(), T :: f(), R :: f()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord3dv/1

    -spec texCoord3dv({S :: f(), T :: f(), R :: f()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord3f(S, T, R)

    -spec texCoord3f(S :: f(), T :: f(), R :: f()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord3fv/1

    -spec texCoord3fv({S :: f(), T :: f(), R :: f()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord3i(S, T, R)

    -spec texCoord3i(S :: i(), T :: i(), R :: i()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord3iv/1

    -spec texCoord3iv({S :: i(), T :: i(), R :: i()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord3s(S, T, R)

    -spec texCoord3s(S :: i(), T :: i(), R :: i()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord3sv/1

    -spec texCoord3sv({S :: i(), T :: i(), R :: i()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord4d(S, T, R, Q)

    -spec texCoord4d(S :: f(), T :: f(), R :: f(), Q :: f()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord4dv/1

    -spec texCoord4dv({S :: f(), T :: f(), R :: f(), Q :: f()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord4f(S, T, R, Q)

    -spec texCoord4f(S :: f(), T :: f(), R :: f(), Q :: f()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord4fv/1

    -spec texCoord4fv({S :: f(), T :: f(), R :: f(), Q :: f()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord4i(S, T, R, Q)

    -spec texCoord4i(S :: i(), T :: i(), R :: i(), Q :: i()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord4iv/1

    -spec texCoord4iv({S :: i(), T :: i(), R :: i(), Q :: i()}) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord4s(S, T, R, Q)

    -spec texCoord4s(S :: i(), T :: i(), R :: i(), Q :: i()) -> ok.

Equivalent to `texCoord4sv/1`.

# texCoord4sv/1

    -spec texCoord4sv({S :: i(), T :: i(), R :: i(), Q :: i()}) -> ok.

`gl:texCoord()` specifies texture coordinates in one, two, three, or four dimensions. `gl:texCoord1()` sets the current texture coordinates to (s 0 0 1); a call to `gl:texCoord2()` sets them to (s t 0 1). Similarly, `gl:texCoord3()` specifies the texture coordinates as (s t r 1), and `gl:texCoord4()` defines all four components explicitly as (s t r q).

External documentation.

# texCoordPointer(Size, Type, Stride, Ptr)

    -spec texCoordPointer(Size :: i(), Type :: enum(), Stride :: i(), Ptr :: offset() | mem()) -> ok.

`gl:texCoordPointer/4` specifies the location and data format of an array of texture coordinates to use when rendering. `Size` specifies the number of coordinates per texture coordinate set, and must be 1, 2, 3, or 4. `Type` specifies the data type of each texture coordinate, and `Stride` specifies the byte stride from one texture coordinate set to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays. (Single-array storage may be more efficient on some implementations; see `gl:interleavedArrays/3`.)

External documentation.

# texEnvf(Target, Pname, Param)

    -spec texEnvf(Target :: enum(), Pname :: enum(), Param :: f()) -> ok.

Equivalent to `texEnviv/3`.

# texEnvfv(Target, Pname, Params)

    -spec texEnvfv(Target :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

Equivalent to `texEnviv/3`.

# texEnvi(Target, Pname, Param)

    -spec texEnvi(Target :: enum(), Pname :: enum(), Param :: i()) -> ok.

Equivalent to `texEnviv/3`.

# texEnviv(Target, Pname, Params)

    -spec texEnviv(Target :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

A texture environment specifies how texture values are interpreted when a fragment is textured. When `Target` is `?GL_TEXTURE_FILTER_CONTROL`, `Pname` must be `?GL_TEXTURE_LOD_BIAS`. When `Target` is `?GL_TEXTURE_ENV`, `Pname` can be `?GL_TEXTURE_ENV_MODE`, `?GL_TEXTURE_ENV_COLOR`, `?GL_COMBINE_RGB`, `?GL_COMBINE_ALPHA`, `?GL_RGB_SCALE`, `?GL_ALPHA_SCALE`, `?GL_SRC0_RGB`, `?GL_SRC1_RGB`, `?GL_SRC2_RGB`, `?GL_SRC0_ALPHA`, `?GL_SRC1_ALPHA`, or `?GL_SRC2_ALPHA`.

External documentation.

# texGend(Coord, Pname, Param)

    -spec texGend(Coord :: enum(), Pname :: enum(), Param :: f()) -> ok.

Equivalent to `texGeniv/3`.

# texGendv(Coord, Pname, Params)

    -spec texGendv(Coord :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

Equivalent to `texGeniv/3`.

# texGenf(Coord, Pname, Param)

    -spec texGenf(Coord :: enum(), Pname :: enum(), Param :: f()) -> ok.

Equivalent to `texGeniv/3`.

# texGenfv(Coord, Pname, Params)

    -spec texGenfv(Coord :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

Equivalent to `texGeniv/3`.

# texGeni(Coord, Pname, Param)

    -spec texGeni(Coord :: enum(), Pname :: enum(), Param :: i()) -> ok.

Equivalent to `texGeniv/3`.

# texGeniv(Coord, Pname, Params)

    -spec texGeniv(Coord :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

`gl:texGen()` selects a texture-coordinate generation function or supplies coefficients for one of the functions. `Coord` names one of the (`s`, `t`, `r`, `q`) texture coordinates; it must be one of the symbols `?GL_S`, `?GL_T`, `?GL_R`, or `?GL_Q`. `Pname` must be one of three symbolic constants: `?GL_TEXTURE_GEN_MODE`, `?GL_OBJECT_PLANE`, or `?GL_EYE_PLANE`. If `Pname` is `?GL_TEXTURE_GEN_MODE`, then `Params` chooses a mode, one of `?GL_OBJECT_LINEAR`, `?GL_EYE_LINEAR`, `?GL_SPHERE_MAP`, `?GL_NORMAL_MAP`, or `?GL_REFLECTION_MAP`. If `Pname` is either `?GL_OBJECT_PLANE` or `?GL_EYE_PLANE`, `Params` contains coefficients for the corresponding texture generation function.

External documentation.

# texImage1D(Target, Level, InternalFormat, Width, Border, Format, Type, Pixels)

    -spec texImage1D(Target, Level, InternalFormat, Width, Border, Format, Type, Pixels) -> ok
                        when
                            Target :: enum(),
                            Level :: i(),
                            InternalFormat :: i(),
                            Width :: i(),
                            Border :: i(),
                            Format :: enum(),
                            Type :: enum(),
                            Pixels :: offset() | mem().

Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled. To enable and disable one-dimensional texturing, call `gl:enable/1` and `gl:disable/1` with argument `?GL_TEXTURE_1D`.

External documentation.

# texImage2D(Target, Level, InternalFormat, Width, Height, Border, Format, Type, Pixels)

    -spec texImage2D(Target, Level, InternalFormat, Width, Height, Border, Format, Type, Pixels) -> ok
                        when
                            Target :: enum(),
                            Level :: i(),
                            InternalFormat :: i(),
                            Width :: i(),
                            Height :: i(),
                            Border :: i(),
                            Format :: enum(),
                            Type :: enum(),
                            Pixels :: offset() | mem().

Texturing allows elements of an image array to be read by shaders.

External documentation.

# texImage2DMultisample(Target, Samples, Internalformat, Width, Height, Fixedsamplelocations)

    -spec texImage2DMultisample(Target, Samples, Internalformat, Width, Height, Fixedsamplelocations) -> ok
                                   when
                                       Target :: enum(),
                                       Samples :: i(),
                                       Internalformat :: enum(),
                                       Width :: i(),
                                       Height :: i(),
                                       Fixedsamplelocations :: 0 | 1.

`gl:texImage2DMultisample/6` establishes the data storage, format, dimensions and number of samples of a multisample texture's image.

External documentation.

# texImage3D(Target, Level, InternalFormat, Width, Height, Depth, Border, Format, Type, Pixels)

    -spec texImage3D(Target, Level, InternalFormat, Width, Height, Depth, Border, Format, Type, Pixels) ->
                        ok
                        when
                            Target :: enum(),
                            Level :: i(),
                            InternalFormat :: i(),
                            Width :: i(),
                            Height :: i(),
                            Depth :: i(),
                            Border :: i(),
                            Format :: enum(),
                            Type :: enum(),
                            Pixels :: offset() | mem().

Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled. To enable and disable three-dimensional texturing, call `gl:enable/1` and `gl:disable/1` with argument `?GL_TEXTURE_3D`.

External documentation.

# texImage3DMultisample(Target, Samples, Internalformat, Width, Height, Depth, Fixedsamplelocations)

    -spec texImage3DMultisample(Target, Samples, Internalformat, Width, Height, Depth, Fixedsamplelocations) ->
                                   ok
                                   when
                                       Target :: enum(),
                                       Samples :: i(),
                                       Internalformat :: enum(),
                                       Width :: i(),
                                       Height :: i(),
                                       Depth :: i(),
                                       Fixedsamplelocations :: 0 | 1.

`gl:texImage3DMultisample/7` establishes the data storage, format, dimensions and number of samples of a multisample texture's image.

External documentation.

# texParameterf(Target, Pname, Param)

    -spec texParameterf(Target :: enum(), Pname :: enum(), Param :: f()) -> ok.

Equivalent to `texParameteriv/3`.

# texParameterfv(Target, Pname, Params)

    -spec texParameterfv(Target :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

Equivalent to `texParameteriv/3`.

# texParameterIiv(Target, Pname, Params)

    -spec texParameterIiv(Target :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

Equivalent to `texParameteriv/3`.

# texParameterIuiv(Target, Pname, Params)

    -spec texParameterIuiv(Target :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

Equivalent to `texParameteriv/3`.

# texParameteri(Target, Pname, Param)

    -spec texParameteri(Target :: enum(), Pname :: enum(), Param :: i()) -> ok.

Equivalent to `texParameteriv/3`.

# texParameteriv(Target, Pname, Params)

    -spec texParameteriv(Target :: enum(), Pname :: enum(), Params :: tuple()) -> ok.

`gl:texParameter()` and `gl:textureParameter()` assign the value or values in `Params` to the texture parameter specified as `Pname`. For `gl:texParameter()`, `Target` defines the target texture, either `?GL_TEXTURE_1D`, `?GL_TEXTURE_1D_ARRAY`, `?GL_TEXTURE_2D`, `?GL_TEXTURE_2D_ARRAY`, `?GL_TEXTURE_2D_MULTISAMPLE`, `?GL_TEXTURE_2D_MULTISAMPLE_ARRAY`, `?GL_TEXTURE_3D`, `?GL_TEXTURE_CUBE_MAP`, `?GL_TEXTURE_CUBE_MAP_ARRAY`, or `?GL_TEXTURE_RECTANGLE`. The following symbols are accepted in `Pname`:

External documentation.

# texStorage1D(Target, Levels, Internalformat, Width)

    -spec texStorage1D(Target :: enum(), Levels :: i(), Internalformat :: enum(), Width :: i()) -> ok.

`gl:texStorage1D/4` and `gl:textureStorage1D()` specify the storage requirements for all levels of a one-dimensional texture simultaneously. Once a texture is specified with this command, the format and dimensions of all levels become immutable unless it is a proxy texture. The contents of the image may still be modified, however, its storage requirements may not change. Such a texture is referred to as an `immutable-format` texture.

External documentation.

# texStorage2D(Target, Levels, Internalformat, Width, Height)

    -spec texStorage2D(Target :: enum(),
                       Levels :: i(),
                       Internalformat :: enum(),
                       Width :: i(),
                       Height :: i()) ->
                          ok.

`gl:texStorage2D/5` and `gl:textureStorage2D()` specify the storage requirements for all levels of a two-dimensional texture or one-dimensional texture array simultaneously. Once a texture is specified with this command, the format and dimensions of all levels become immutable unless it is a proxy texture. The contents of the image may still be modified, however, its storage requirements may not change. Such a texture is referred to as an `immutable-format` texture.

External documentation.

# texStorage2DMultisample(Target, Samples, Internalformat, Width, Height, Fixedsamplelocations)

    -spec texStorage2DMultisample(Target, Samples, Internalformat, Width, Height, Fixedsamplelocations) ->
                                     ok
                                     when
                                         Target :: enum(),
                                         Samples :: i(),
                                         Internalformat :: enum(),
                                         Width :: i(),
                                         Height :: i(),
                                         Fixedsamplelocations :: 0 | 1.

`gl:texStorage2DMultisample/6` and `gl:textureStorage2DMultisample()` specify the storage requirements for a two-dimensional multisample texture. Once a texture is specified with this command, its format and dimensions become immutable unless it is a proxy texture. The contents of the image may still be modified, however, its storage requirements may not change. Such a texture is referred to as an `immutable-format` texture.

External documentation.

# texStorage3D(Target, Levels, Internalformat, Width, Height, Depth)

    -spec texStorage3D(Target, Levels, Internalformat, Width, Height, Depth) -> ok
                          when
                              Target :: enum(),
                              Levels :: i(),
                              Internalformat :: enum(),
                              Width :: i(),
                              Height :: i(),
                              Depth :: i().

`gl:texStorage3D/6` and `gl:textureStorage3D()` specify the storage requirements for all levels of a three-dimensional, two-dimensional array or cube-map array texture simultaneously. Once a texture is specified with this command, the format and dimensions of all levels become immutable unless it is a proxy texture. The contents of the image may still be modified, however, its storage requirements may not change. Such a texture is referred to as an `immutable-format` texture.

External documentation.

# texStorage3DMultisample(Target, Samples, Internalformat, Width, Height, Depth, Fixedsamplelocations)

    -spec texStorage3DMultisample(Target, Samples, Internalformat, Width, Height, Depth,
                                  Fixedsamplelocations) ->
                                     ok
                                     when
                                         Target :: enum(),
                                         Samples :: i(),
                                         Internalformat :: enum(),
                                         Width :: i(),
                                         Height :: i(),
                                         Depth :: i(),
                                         Fixedsamplelocations :: 0 | 1.

`gl:texStorage3DMultisample/7` and `gl:textureStorage3DMultisample()` specify the storage requirements for a two-dimensional multisample array texture. Once a texture is specified with this command, its format and dimensions become immutable unless it is a proxy texture. The contents of the image may still be modified, however, its storage requirements may not change. Such a texture is referred to as an `immutable-format` texture.

External documentation.

# texSubImage1D(Target, Level, Xoffset, Width, Format, Type, Pixels)

    -spec texSubImage1D(Target, Level, Xoffset, Width, Format, Type, Pixels) -> ok
                           when
                               Target :: enum(),
                               Level :: i(),
                               Xoffset :: i(),
                               Width :: i(),
                               Format :: enum(),
                               Type :: enum(),
                               Pixels :: offset() | mem().

Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled. To enable or disable one-dimensional texturing, call `gl:enable/1` and `gl:disable/1` with argument `?GL_TEXTURE_1D`.

External documentation.

# texSubImage2D(Target, Level, Xoffset, Yoffset, Width, Height, Format, Type, Pixels)

    -spec texSubImage2D(Target, Level, Xoffset, Yoffset, Width, Height, Format, Type, Pixels) -> ok
                           when
                               Target :: enum(),
                               Level :: i(),
                               Xoffset :: i(),
                               Yoffset :: i(),
                               Width :: i(),
                               Height :: i(),
                               Format :: enum(),
                               Type :: enum(),
                               Pixels :: offset() | mem().

Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled.

External documentation.

# texSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth, Format, Type, Pixels)

    -spec texSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth, Format, Type,
                        Pixels) ->
                           ok
                           when
                               Target :: enum(),
                               Level :: i(),
                               Xoffset :: i(),
                               Yoffset :: i(),
                               Zoffset :: i(),
                               Width :: i(),
                               Height :: i(),
                               Depth :: i(),
                               Format :: enum(),
                               Type :: enum(),
                               Pixels :: offset() | mem().

Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled.

External documentation.

# textureBarrier()

    -spec textureBarrier() -> ok.

The values of rendered fragments are undefined when a shader stage fetches texels and the same texels are written via fragment shader outputs, even if the reads and writes are not in the same drawing command. To safely read the result of a written texel via a texel fetch in a subsequent drawing command, call `gl:textureBarrier/0` between the two drawing commands to guarantee that writes have completed and caches have been invalidated before subsequent drawing commands are executed.

External documentation.

# textureBuffer(Texture, Internalformat, Buffer)

    -spec textureBuffer(Texture :: i(), Internalformat :: enum(), Buffer :: i()) -> ok.

`gl:texBuffer/3` and `gl:textureBuffer/3` attaches the data store of a specified buffer object to a specified texture object, and specify the storage format for the texture image found in the buffer object. The texture object must be a buffer texture.

External documentation.

# textureBufferRange(Texture, Internalformat, Buffer, Offset, Size)

    -spec textureBufferRange(Texture :: i(),
                             Internalformat :: enum(),
                             Buffer :: i(),
                             Offset :: i(),
                             Size :: i()) ->
                                ok.

`gl:texBufferRange/5` and `gl:textureBufferRange/5` attach a range of the data store of a specified buffer object to a specified texture object, and specify the storage format for the texture image found in the buffer object. The texture object must be a buffer texture.

External documentation.

# textureView(Texture, Target, Origtexture, Internalformat, Minlevel, Numlevels, Minlayer, Numlayers)

    -spec textureView(Texture, Target, Origtexture, Internalformat, Minlevel, Numlevels, Minlayer,
                      Numlayers) ->
                         ok
                         when
                             Texture :: i(),
                             Target :: enum(),
                             Origtexture :: i(),
                             Internalformat :: enum(),
                             Minlevel :: i(),
                             Numlevels :: i(),
                             Minlayer :: i(),
                             Numlayers :: i().

`gl:textureView/8` initializes a texture object as an alias, or view of another texture object, sharing some or all of the parent texture's data store with the initialized texture. `Texture` specifies a name previously reserved by a successful call to `gl:genTextures/1` but that has not yet been bound or given a target. `Target` specifies the target for the newly initialized texture and must be compatible with the target of the parent texture, given in `Origtexture` as specified in the following table:

External documentation.

# transformFeedbackBufferBase(Xfb, Index, Buffer)

    -spec transformFeedbackBufferBase(Xfb :: i(), Index :: i(), Buffer :: i()) -> ok.

`gl:transformFeedbackBufferBase/3` binds the buffer object `Buffer` to the binding point at index `Index` of the transform feedback object `Xfb`.

External documentation.

# transformFeedbackBufferRange(Xfb, Index, Buffer, Offset, Size)

    -spec transformFeedbackBufferRange(Xfb :: i(), Index :: i(), Buffer :: i(), Offset :: i(), Size :: i()) ->
                                          ok.

`gl:transformFeedbackBufferRange/5` binds a range of the buffer object `Buffer` represented by `Offset` and `Size` to the binding point at index `Index` of the transform feedback object `Xfb`.

External documentation.

# transformFeedbackVaryings(Program, Varyings, BufferMode)

    -spec transformFeedbackVaryings(Program :: i(), Varyings :: [unicode:chardata()], BufferMode :: enum()) ->
                                       ok.

The names of the vertex or geometry shader outputs to be recorded in transform feedback mode are specified using `gl:transformFeedbackVaryings/3`. When a geometry shader is active, transform feedback records the values of selected geometry shader output variables from the emitted vertices. Otherwise, the values of the selected vertex shader outputs are recorded.

External documentation.

# translated(X, Y, Z)

    -spec translated(X :: f(), Y :: f(), Z :: f()) -> ok.

Equivalent to `translatef/3`.

# translatef(X, Y, Z)

    -spec translatef(X :: f(), Y :: f(), Z :: f()) -> ok.

`gl:translate()` produces a translation by (x y z). The current matrix (see `gl:matrixMode/1`) is multiplied by this translation matrix, with the product replacing the current matrix, as if `gl:multMatrix()` were called with the following matrix for its argument:

External documentation.

# uniform1d(Location, X)

    -spec uniform1d(Location :: i(), X :: f()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform1dv(Location, Value)

    -spec uniform1dv(Location :: i(), Value :: [f()]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform1f(Location, V0)

    -spec uniform1f(Location :: i(), V0 :: f()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform1fv(Location, Value)

    -spec uniform1fv(Location :: i(), Value :: [f()]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform1i(Location, V0)

    -spec uniform1i(Location :: i(), V0 :: i()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform1iv(Location, Value)

    -spec uniform1iv(Location :: i(), Value :: [i()]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform1ui(Location, V0)

    -spec uniform1ui(Location :: i(), V0 :: i()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform1uiv(Location, Value)

    -spec uniform1uiv(Location :: i(), Value :: [i()]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform2d(Location, X, Y)

    -spec uniform2d(Location :: i(), X :: f(), Y :: f()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform2dv(Location, Value)

    -spec uniform2dv(Location :: i(), Value :: [{f(), f()}]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform2f(Location, V0, V1)

    -spec uniform2f(Location :: i(), V0 :: f(), V1 :: f()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform2fv(Location, Value)

    -spec uniform2fv(Location :: i(), Value :: [{f(), f()}]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform2i(Location, V0, V1)

    -spec uniform2i(Location :: i(), V0 :: i(), V1 :: i()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform2iv(Location, Value)

    -spec uniform2iv(Location :: i(), Value :: [{i(), i()}]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform2ui(Location, V0, V1)

    -spec uniform2ui(Location :: i(), V0 :: i(), V1 :: i()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform2uiv(Location, Value)

    -spec uniform2uiv(Location :: i(), Value :: [{i(), i()}]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform3d(Location, X, Y, Z)

    -spec uniform3d(Location :: i(), X :: f(), Y :: f(), Z :: f()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform3dv(Location, Value)

    -spec uniform3dv(Location :: i(), Value :: [{f(), f(), f()}]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform3f(Location, V0, V1, V2)

    -spec uniform3f(Location :: i(), V0 :: f(), V1 :: f(), V2 :: f()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform3fv(Location, Value)

    -spec uniform3fv(Location :: i(), Value :: [{f(), f(), f()}]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform3i(Location, V0, V1, V2)

    -spec uniform3i(Location :: i(), V0 :: i(), V1 :: i(), V2 :: i()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform3iv(Location, Value)

    -spec uniform3iv(Location :: i(), Value :: [{i(), i(), i()}]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform3ui(Location, V0, V1, V2)

    -spec uniform3ui(Location :: i(), V0 :: i(), V1 :: i(), V2 :: i()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform3uiv(Location, Value)

    -spec uniform3uiv(Location :: i(), Value :: [{i(), i(), i()}]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform4d(Location, X, Y, Z, W)

    -spec uniform4d(Location :: i(), X :: f(), Y :: f(), Z :: f(), W :: f()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform4dv(Location, Value)

    -spec uniform4dv(Location :: i(), Value :: [{f(), f(), f(), f()}]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform4f(Location, V0, V1, V2, V3)

    -spec uniform4f(Location :: i(), V0 :: f(), V1 :: f(), V2 :: f(), V3 :: f()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform4fv(Location, Value)

    -spec uniform4fv(Location :: i(), Value :: [{f(), f(), f(), f()}]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform4i(Location, V0, V1, V2, V3)

    -spec uniform4i(Location :: i(), V0 :: i(), V1 :: i(), V2 :: i(), V3 :: i()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform4iv(Location, Value)

    -spec uniform4iv(Location :: i(), Value :: [{i(), i(), i(), i()}]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform4ui(Location, V0, V1, V2, V3)

    -spec uniform4ui(Location :: i(), V0 :: i(), V1 :: i(), V2 :: i(), V3 :: i()) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniform4uiv(Location, Value)

    -spec uniform4uiv(Location :: i(), Value :: [{i(), i(), i(), i()}]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniformBlockBinding(Program, UniformBlockIndex, UniformBlockBinding)

    -spec uniformBlockBinding(Program :: i(), UniformBlockIndex :: i(), UniformBlockBinding :: i()) -> ok.

Binding points for active uniform blocks are assigned using `gl:uniformBlockBinding/3`. Each of a program's active uniform blocks has a corresponding uniform buffer binding point. `Program` is the name of a program object for which the command `gl:linkProgram/1` has been issued in the past.

External documentation.

# uniformMatrix2dv(Location, Transpose, Value)

    -spec uniformMatrix2dv(Location :: i(), Transpose :: 0 | 1, Value :: [{f(), f(), f(), f()}]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix2fv(Location, Transpose, Value)

    -spec uniformMatrix2fv(Location :: i(), Transpose :: 0 | 1, Value :: [{f(), f(), f(), f()}]) -> ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix2x3dv(Location, Transpose, Value)

    -spec uniformMatrix2x3dv(Location :: i(), Transpose :: 0 | 1, Value :: [{f(), f(), f(), f(), f(), f()}]) ->
                                ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix2x3fv(Location, Transpose, Value)

    -spec uniformMatrix2x3fv(Location :: i(), Transpose :: 0 | 1, Value :: [{f(), f(), f(), f(), f(), f()}]) ->
                                ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix2x4dv(Location, Transpose, Value)

    -spec uniformMatrix2x4dv(Location :: i(),
                             Transpose :: 0 | 1,
                             Value :: [{f(), f(), f(), f(), f(), f(), f(), f()}]) ->
                                ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix2x4fv(Location, Transpose, Value)

    -spec uniformMatrix2x4fv(Location :: i(),
                             Transpose :: 0 | 1,
                             Value :: [{f(), f(), f(), f(), f(), f(), f(), f()}]) ->
                                ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix3dv(Location, Transpose, Value)

    -spec uniformMatrix3dv(Location :: i(),
                           Transpose :: 0 | 1,
                           Value :: [{f(), f(), f(), f(), f(), f(), f(), f(), f()}]) ->
                              ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix3fv(Location, Transpose, Value)

    -spec uniformMatrix3fv(Location :: i(),
                           Transpose :: 0 | 1,
                           Value :: [{f(), f(), f(), f(), f(), f(), f(), f(), f()}]) ->
                              ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix3x2dv(Location, Transpose, Value)

    -spec uniformMatrix3x2dv(Location :: i(), Transpose :: 0 | 1, Value :: [{f(), f(), f(), f(), f(), f()}]) ->
                                ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix3x2fv(Location, Transpose, Value)

    -spec uniformMatrix3x2fv(Location :: i(), Transpose :: 0 | 1, Value :: [{f(), f(), f(), f(), f(), f()}]) ->
                                ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix3x4dv(Location, Transpose, Value)

    -spec uniformMatrix3x4dv(Location, Transpose, Value) -> ok
                                when
                                    Location :: i(),
                                    Transpose :: 0 | 1,
                                    Value :: [{f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f()}].

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix3x4fv(Location, Transpose, Value)

    -spec uniformMatrix3x4fv(Location, Transpose, Value) -> ok
                                when
                                    Location :: i(),
                                    Transpose :: 0 | 1,
                                    Value :: [{f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f()}].

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix4dv(Location, Transpose, Value)

    -spec uniformMatrix4dv(Location, Transpose, Value) -> ok
                              when
                                  Location :: i(),
                                  Transpose :: 0 | 1,
                                  Value ::
                                      [{f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f()}].

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix4fv(Location, Transpose, Value)

    -spec uniformMatrix4fv(Location, Transpose, Value) -> ok
                              when
                                  Location :: i(),
                                  Transpose :: 0 | 1,
                                  Value ::
                                      [{f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f(),
                                        f()}].

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix4x2dv(Location, Transpose, Value)

    -spec uniformMatrix4x2dv(Location :: i(),
                             Transpose :: 0 | 1,
                             Value :: [{f(), f(), f(), f(), f(), f(), f(), f()}]) ->
                                ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix4x2fv(Location, Transpose, Value)

    -spec uniformMatrix4x2fv(Location :: i(),
                             Transpose :: 0 | 1,
                             Value :: [{f(), f(), f(), f(), f(), f(), f(), f()}]) ->
                                ok.

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix4x3dv(Location, Transpose, Value)

    -spec uniformMatrix4x3dv(Location, Transpose, Value) -> ok
                                when
                                    Location :: i(),
                                    Transpose :: 0 | 1,
                                    Value :: [{f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f()}].

Equivalent to `uniformMatrix4x3fv/3`.

# uniformMatrix4x3fv(Location, Transpose, Value)

    -spec uniformMatrix4x3fv(Location, Transpose, Value) -> ok
                                when
                                    Location :: i(),
                                    Transpose :: 0 | 1,
                                    Value :: [{f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f(), f()}].

`gl:uniform()` modifies the value of a uniform variable or a uniform variable array. The location of the uniform variable to be modified is specified by `Location`, which should be a value returned by `gl:getUniformLocation/2`. `gl:uniform()` operates on the program object that was made part of current state by calling `gl:useProgram/1`.

External documentation.

# uniformSubroutinesuiv(Shadertype, Indices)

    -spec uniformSubroutinesuiv(Shadertype :: enum(), Indices :: [i()]) -> ok.

`gl:uniformSubroutines()` loads all active subroutine uniforms for shader stage `Shadertype` of the current program with subroutine indices from `Indices`, storing `Indices[i]` into the uniform at location `I`. `Count` must be equal to the value of `?GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS` for the program currently in use at shader stage `Shadertype`. Furthermore, all values in `Indices` must be less than the value of `?GL_ACTIVE_SUBROUTINES` for the shader stage.

External documentation.

# useProgram(Program)

    -spec useProgram(Program :: i()) -> ok.

`gl:useProgram/1` installs the program object specified by `Program` as part of current rendering state. One or more executables are created in a program object by successfully attaching shader objects to it with `gl:attachShader/2`, successfully compiling the shader objects with `gl:compileShader/1`, and successfully linking the program object with `gl:linkProgram/1`.

External documentation.

# useProgramStages(Pipeline, Stages, Program)

    -spec useProgramStages(Pipeline :: i(), Stages :: i(), Program :: i()) -> ok.

`gl:useProgramStages/3` binds executables from a program object associated with a specified set of shader stages to the program pipeline object given by `Pipeline`. `Pipeline` specifies the program pipeline object to which to bind the executables. `Stages` contains a logical combination of bits indicating the shader stages to use within `Program` with the program pipeline object `Pipeline`. `Stages` must be a logical combination of `?GL_VERTEX_SHADER_BIT`, `?GL_TESS_CONTROL_SHADER_BIT`, `?GL_TESS_EVALUATION_SHADER_BIT`, `?GL_GEOMETRY_SHADER_BIT`, `?GL_FRAGMENT_SHADER_BIT` and `?GL_COMPUTE_SHADER_BIT`. Additionally, the special value `?GL_ALL_SHADER_BITS` may be specified to indicate that all executables contained in `Program` should be installed in `Pipeline`.

External documentation.

# validateProgram(Program)

    -spec validateProgram(Program :: i()) -> ok.

`gl:validateProgram/1` checks to see whether the executables contained in `Program` can execute given the current OpenGL state. The information generated by the validation process will be stored in `Program`'s information log. The validation information may consist of an empty string, or it may be a string containing information about how the current program object interacts with the rest of current OpenGL state. This provides a way for OpenGL implementers to convey more information about why the current program is inefficient, suboptimal, failing to execute, and so on.

External documentation.

# validateProgramPipeline(Pipeline)

    -spec validateProgramPipeline(Pipeline :: i()) -> ok.

`gl:validateProgramPipeline/1` instructs the implementation to validate the shader executables contained in `Pipeline` against the current GL state. The implementation may use this as an opportunity to perform any internal shader modifications that may be required to ensure correct operation of the installed shaders given the current GL state.

External documentation.

# vertex2d(X, Y)

    -spec vertex2d(X :: f(), Y :: f()) -> ok.

Equivalent to `vertex4sv/1`.

# vertex2dv/1

    -spec vertex2dv({X :: f(), Y :: f()}) -> ok.

Equivalent to `vertex4sv/1`.

# vertex2f(X, Y)

    -spec vertex2f(X :: f(), Y :: f()) -> ok.

Equivalent to `vertex4sv/1`.

# vertex2fv/1

    -spec vertex2fv({X :: f(), Y :: f()}) -> ok.

Equivalent to `vertex4sv/1`.

# vertex2i(X, Y)

    -spec vertex2i(X :: i(), Y :: i()) -> ok.

Equivalent to `vertex4sv/1`.

# vertex2iv/1

    -spec vertex2iv({X :: i(), Y :: i()}) -> ok.

Equivalent to `vertex4sv/1`.

# vertex2s(X, Y)

    -spec vertex2s(X :: i(), Y :: i()) -> ok.

Equivalent to `vertex4sv/1`.

# vertex2sv/1

    -spec vertex2sv({X :: i(), Y :: i()}) -> ok.

Equivalent to `vertex4sv/1`.

# vertex3d(X, Y, Z)

    -spec vertex3d(X :: f(), Y :: f(), Z :: f()) -> ok.

Equivalent to `vertex4sv/1`.

# vertex3dv/1

    -spec vertex3dv({X :: f(), Y :: f(), Z :: f()}) -> ok.

Equivalent to `vertex4sv/1`.

# vertex3f(X, Y, Z)

    -spec vertex3f(X :: f(), Y :: f(), Z :: f()) -> ok.

Equivalent to `vertex4sv/1`.

# vertex3fv/1

    -spec vertex3fv({X :: f(), Y :: f(), Z :: f()}) -> ok.

Equivalent to `vertex4sv/1`.

# vertex3i(X, Y, Z)

    -spec vertex3i(X :: i(), Y :: i(), Z :: i()) -> ok.

Equivalent to `vertex4sv/1`.

# vertex3iv/1

    -spec vertex3iv({X :: i(), Y :: i(), Z :: i()}) -> ok.

Equivalent to `vertex4sv/1`.

# vertex3s(X, Y, Z)

    -spec vertex3s(X :: i(), Y :: i(), Z :: i()) -> ok.

Equivalent to `vertex4sv/1`.

# vertex3sv/1

    -spec vertex3sv({X :: i(), Y :: i(), Z :: i()}) -> ok.

Equivalent to `vertex4sv/1`.

# vertex4d(X, Y, Z, W)

    -spec vertex4d(X :: f(), Y :: f(), Z :: f(), W :: f()) -> ok.

Equivalent to `vertex4sv/1`.

# vertex4dv/1

    -spec vertex4dv({X :: f(), Y :: f(), Z :: f(), W :: f()}) -> ok.

Equivalent to `vertex4sv/1`.

# vertex4f(X, Y, Z, W)

    -spec vertex4f(X :: f(), Y :: f(), Z :: f(), W :: f()) -> ok.

Equivalent to `vertex4sv/1`.

# vertex4fv/1

    -spec vertex4fv({X :: f(), Y :: f(), Z :: f(), W :: f()}) -> ok.

Equivalent to `vertex4sv/1`.

# vertex4i(X, Y, Z, W)

    -spec vertex4i(X :: i(), Y :: i(), Z :: i(), W :: i()) -> ok.

Equivalent to `vertex4sv/1`.

# vertex4iv/1

    -spec vertex4iv({X :: i(), Y :: i(), Z :: i(), W :: i()}) -> ok.

Equivalent to `vertex4sv/1`.

# vertex4s(X, Y, Z, W)

    -spec vertex4s(X :: i(), Y :: i(), Z :: i(), W :: i()) -> ok.

Equivalent to `vertex4sv/1`.

# vertex4sv/1

    -spec vertex4sv({X :: i(), Y :: i(), Z :: i(), W :: i()}) -> ok.

`gl:vertex()` commands are used within `gl:'begin'/1`/`gl:'end'/0` pairs to specify point, line, and polygon vertices. The current color, normal, texture coordinates, and fog coordinate are associated with the vertex when `gl:vertex()` is called.

External documentation.

# vertexArrayAttribBinding(Vaobj, Attribindex, Bindingindex)

    -spec vertexArrayAttribBinding(Vaobj :: i(), Attribindex :: i(), Bindingindex :: i()) -> ok.

Equivalent to `vertexAttribBinding/2`.

# vertexArrayAttribFormat(Vaobj, Attribindex, Size, Type, Normalized, Relativeoffset)

    -spec vertexArrayAttribFormat(Vaobj, Attribindex, Size, Type, Normalized, Relativeoffset) -> ok
                                     when
                                         Vaobj :: i(),
                                         Attribindex :: i(),
                                         Size :: i(),
                                         Type :: enum(),
                                         Normalized :: 0 | 1,
                                         Relativeoffset :: i().

Equivalent to `vertexAttribLPointer/5`.

# vertexArrayAttribIFormat(Vaobj, Attribindex, Size, Type, Relativeoffset)

    -spec vertexArrayAttribIFormat(Vaobj :: i(),
                                   Attribindex :: i(),
                                   Size :: i(),
                                   Type :: enum(),
                                   Relativeoffset :: i()) ->
                                      ok.

Equivalent to `vertexAttribLPointer/5`.

# vertexArrayAttribLFormat(Vaobj, Attribindex, Size, Type, Relativeoffset)

    -spec vertexArrayAttribLFormat(Vaobj :: i(),
                                   Attribindex :: i(),
                                   Size :: i(),
                                   Type :: enum(),
                                   Relativeoffset :: i()) ->
                                      ok.

Equivalent to `vertexAttribLPointer/5`.

# vertexArrayBindingDivisor(Vaobj, Bindingindex, Divisor)

    -spec vertexArrayBindingDivisor(Vaobj :: i(), Bindingindex :: i(), Divisor :: i()) -> ok.

Equivalent to `vertexBindingDivisor/2`.

# vertexArrayElementBuffer(Vaobj, Buffer)

    -spec vertexArrayElementBuffer(Vaobj :: i(), Buffer :: i()) -> ok.

`gl:vertexArrayElementBuffer/2` binds a buffer object with id `Buffer` to the element array buffer bind point of a vertex array object with id `Vaobj`. If `Buffer` is zero, any existing element array buffer binding to `Vaobj` is removed.

External documentation.

# vertexArrayVertexBuffer(Vaobj, Bindingindex, Buffer, Offset, Stride)

    -spec vertexArrayVertexBuffer(Vaobj :: i(),
                                  Bindingindex :: i(),
                                  Buffer :: i(),
                                  Offset :: i(),
                                  Stride :: i()) ->
                                     ok.

`gl:bindVertexBuffer/4` and `gl:vertexArrayVertexBuffer/5` bind the buffer named `Buffer` to the vertex buffer binding point whose index is given by `Bindingindex`. `gl:bindVertexBuffer/4` modifies the binding of the currently bound vertex array object, whereas `gl:vertexArrayVertexBuffer/5` allows the caller to specify ID of the vertex array object with an argument named `Vaobj`, for which the binding should be modified. `Offset` and `Stride` specify the offset of the first element within the buffer and the distance between elements within the buffer, respectively, and are both measured in basic machine units. `Bindingindex` must be less than the value of `?GL_MAX_VERTEX_ATTRIB_BINDINGS`. `Offset` and `Stride` must be greater than or equal to zero. If `Buffer` is zero, then any buffer currently bound to the specified binding point is unbound.

External documentation.

# vertexArrayVertexBuffers(Vaobj, First, Buffers, Offsets, Strides)

    -spec vertexArrayVertexBuffers(Vaobj :: i(),
                                   First :: i(),
                                   Buffers :: [i()],
                                   Offsets :: [i()],
                                   Strides :: [i()]) ->
                                      ok.

`gl:bindVertexBuffers/4` and `gl:vertexArrayVertexBuffers/5` bind storage from an array of existing buffer objects to a specified number of consecutive vertex buffer binding points units in a vertex array object. For `gl:bindVertexBuffers/4`, the vertex array object is the currently bound vertex array object. For `gl:vertexArrayVertexBuffers/5`, `Vaobj` is the name of the vertex array object.

External documentation.

# vertexAttrib1d(Index, X)

    -spec vertexAttrib1d(Index :: i(), X :: f()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib1dv/2

    -spec vertexAttrib1dv(Index :: i(), {X :: f()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib1f(Index, X)

    -spec vertexAttrib1f(Index :: i(), X :: f()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib1fv/2

    -spec vertexAttrib1fv(Index :: i(), {X :: f()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib1s(Index, X)

    -spec vertexAttrib1s(Index :: i(), X :: i()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib1sv/2

    -spec vertexAttrib1sv(Index :: i(), {X :: i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib2d(Index, X, Y)

    -spec vertexAttrib2d(Index :: i(), X :: f(), Y :: f()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib2dv/2

    -spec vertexAttrib2dv(Index :: i(), {X :: f(), Y :: f()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib2f(Index, X, Y)

    -spec vertexAttrib2f(Index :: i(), X :: f(), Y :: f()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib2fv/2

    -spec vertexAttrib2fv(Index :: i(), {X :: f(), Y :: f()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib2s(Index, X, Y)

    -spec vertexAttrib2s(Index :: i(), X :: i(), Y :: i()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib2sv/2

    -spec vertexAttrib2sv(Index :: i(), {X :: i(), Y :: i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib3d(Index, X, Y, Z)

    -spec vertexAttrib3d(Index :: i(), X :: f(), Y :: f(), Z :: f()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib3dv/2

    -spec vertexAttrib3dv(Index :: i(), {X :: f(), Y :: f(), Z :: f()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib3f(Index, X, Y, Z)

    -spec vertexAttrib3f(Index :: i(), X :: f(), Y :: f(), Z :: f()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib3fv/2

    -spec vertexAttrib3fv(Index :: i(), {X :: f(), Y :: f(), Z :: f()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib3s(Index, X, Y, Z)

    -spec vertexAttrib3s(Index :: i(), X :: i(), Y :: i(), Z :: i()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib3sv/2

    -spec vertexAttrib3sv(Index :: i(), {X :: i(), Y :: i(), Z :: i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4bv(Index, V)

    -spec vertexAttrib4bv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4d(Index, X, Y, Z, W)

    -spec vertexAttrib4d(Index :: i(), X :: f(), Y :: f(), Z :: f(), W :: f()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4dv/2

    -spec vertexAttrib4dv(Index :: i(), {X :: f(), Y :: f(), Z :: f(), W :: f()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4f(Index, X, Y, Z, W)

    -spec vertexAttrib4f(Index :: i(), X :: f(), Y :: f(), Z :: f(), W :: f()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4fv/2

    -spec vertexAttrib4fv(Index :: i(), {X :: f(), Y :: f(), Z :: f(), W :: f()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4iv(Index, V)

    -spec vertexAttrib4iv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4Nbv(Index, V)

    -spec vertexAttrib4Nbv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4Niv(Index, V)

    -spec vertexAttrib4Niv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4Nsv(Index, V)

    -spec vertexAttrib4Nsv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4Nub(Index, X, Y, Z, W)

    -spec vertexAttrib4Nub(Index :: i(), X :: i(), Y :: i(), Z :: i(), W :: i()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4Nubv/2

    -spec vertexAttrib4Nubv(Index :: i(), {X :: i(), Y :: i(), Z :: i(), W :: i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4Nuiv(Index, V)

    -spec vertexAttrib4Nuiv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4Nusv(Index, V)

    -spec vertexAttrib4Nusv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4s(Index, X, Y, Z, W)

    -spec vertexAttrib4s(Index :: i(), X :: i(), Y :: i(), Z :: i(), W :: i()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4sv/2

    -spec vertexAttrib4sv(Index :: i(), {X :: i(), Y :: i(), Z :: i(), W :: i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4ubv(Index, V)

    -spec vertexAttrib4ubv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4uiv(Index, V)

    -spec vertexAttrib4uiv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttrib4usv(Index, V)

    -spec vertexAttrib4usv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribBinding(Attribindex, Bindingindex)

    -spec vertexAttribBinding(Attribindex :: i(), Bindingindex :: i()) -> ok.

`gl:vertexAttribBinding/2` and `gl:vertexArrayAttribBinding/3` establishes an association between the generic vertex attribute of a vertex array object whose index is given by `Attribindex`, and a vertex buffer binding whose index is given by `Bindingindex`. For `gl:vertexAttribBinding/2`, the vertex array object affected is that currently bound. For `gl:vertexArrayAttribBinding/3`, `Vaobj` is the name of the vertex array object.

External documentation.

# vertexAttribDivisor(Index, Divisor)

    -spec vertexAttribDivisor(Index :: i(), Divisor :: i()) -> ok.

`gl:vertexAttribDivisor/2` modifies the rate at which generic vertex attributes advance when rendering multiple instances of primitives in a single draw call. If `Divisor` is zero, the attribute at slot `Index` advances once per vertex. If `Divisor` is non-zero, the attribute advances once per `Divisor` instances of the set(s) of vertices being rendered. An attribute is referred to as instanced if its `?GL_VERTEX_ATTRIB_ARRAY_DIVISOR` value is non-zero.

External documentation.

# vertexAttribFormat(Attribindex, Size, Type, Normalized, Relativeoffset)

    -spec vertexAttribFormat(Attribindex :: i(),
                             Size :: i(),
                             Type :: enum(),
                             Normalized :: 0 | 1,
                             Relativeoffset :: i()) ->
                                ok.

Equivalent to `vertexAttribLPointer/5`.

# vertexAttribI1i(Index, X)

    -spec vertexAttribI1i(Index :: i(), X :: i()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI1iv/2

    -spec vertexAttribI1iv(Index :: i(), {X :: i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI1ui(Index, X)

    -spec vertexAttribI1ui(Index :: i(), X :: i()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI1uiv/2

    -spec vertexAttribI1uiv(Index :: i(), {X :: i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI2i(Index, X, Y)

    -spec vertexAttribI2i(Index :: i(), X :: i(), Y :: i()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI2iv/2

    -spec vertexAttribI2iv(Index :: i(), {X :: i(), Y :: i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI2ui(Index, X, Y)

    -spec vertexAttribI2ui(Index :: i(), X :: i(), Y :: i()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI2uiv/2

    -spec vertexAttribI2uiv(Index :: i(), {X :: i(), Y :: i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI3i(Index, X, Y, Z)

    -spec vertexAttribI3i(Index :: i(), X :: i(), Y :: i(), Z :: i()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI3iv/2

    -spec vertexAttribI3iv(Index :: i(), {X :: i(), Y :: i(), Z :: i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI3ui(Index, X, Y, Z)

    -spec vertexAttribI3ui(Index :: i(), X :: i(), Y :: i(), Z :: i()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI3uiv/2

    -spec vertexAttribI3uiv(Index :: i(), {X :: i(), Y :: i(), Z :: i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI4bv(Index, V)

    -spec vertexAttribI4bv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI4i(Index, X, Y, Z, W)

    -spec vertexAttribI4i(Index :: i(), X :: i(), Y :: i(), Z :: i(), W :: i()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI4iv/2

    -spec vertexAttribI4iv(Index :: i(), {X :: i(), Y :: i(), Z :: i(), W :: i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI4sv(Index, V)

    -spec vertexAttribI4sv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI4ubv(Index, V)

    -spec vertexAttribI4ubv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI4ui(Index, X, Y, Z, W)

    -spec vertexAttribI4ui(Index :: i(), X :: i(), Y :: i(), Z :: i(), W :: i()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI4uiv/2

    -spec vertexAttribI4uiv(Index :: i(), {X :: i(), Y :: i(), Z :: i(), W :: i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribI4usv(Index, V)

    -spec vertexAttribI4usv(Index :: i(), V :: {i(), i(), i(), i()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribIFormat(Attribindex, Size, Type, Relativeoffset)

    -spec vertexAttribIFormat(Attribindex :: i(), Size :: i(), Type :: enum(), Relativeoffset :: i()) -> ok.

Equivalent to `vertexAttribLPointer/5`.

# vertexAttribIPointer(Index, Size, Type, Stride, Pointer)

    -spec vertexAttribIPointer(Index :: i(),
                               Size :: i(),
                               Type :: enum(),
                               Stride :: i(),
                               Pointer :: offset() | mem()) ->
                                  ok.

Equivalent to `vertexAttribLPointer/5`.

# vertexAttribL1d(Index, X)

    -spec vertexAttribL1d(Index :: i(), X :: f()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribL1dv/2

    -spec vertexAttribL1dv(Index :: i(), {X :: f()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribL2d(Index, X, Y)

    -spec vertexAttribL2d(Index :: i(), X :: f(), Y :: f()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribL2dv/2

    -spec vertexAttribL2dv(Index :: i(), {X :: f(), Y :: f()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribL3d(Index, X, Y, Z)

    -spec vertexAttribL3d(Index :: i(), X :: f(), Y :: f(), Z :: f()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribL3dv/2

    -spec vertexAttribL3dv(Index :: i(), {X :: f(), Y :: f(), Z :: f()}) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribL4d(Index, X, Y, Z, W)

    -spec vertexAttribL4d(Index :: i(), X :: f(), Y :: f(), Z :: f(), W :: f()) -> ok.

Equivalent to `vertexAttribL4dv/2`.

# vertexAttribL4dv/2

    -spec vertexAttribL4dv(Index :: i(), {X :: f(), Y :: f(), Z :: f(), W :: f()}) -> ok.

The `gl:vertexAttrib()` family of entry points allows an application to pass generic vertex attributes in numbered locations.

External documentation.

# vertexAttribLFormat(Attribindex, Size, Type, Relativeoffset)

    -spec vertexAttribLFormat(Attribindex :: i(), Size :: i(), Type :: enum(), Relativeoffset :: i()) -> ok.

Equivalent to `vertexAttribLPointer/5`.

# vertexAttribLPointer(Index, Size, Type, Stride, Pointer)

    -spec vertexAttribLPointer(Index :: i(),
                               Size :: i(),
                               Type :: enum(),
                               Stride :: i(),
                               Pointer :: offset() | mem()) ->
                                  ok.

`gl:vertexAttribFormat/5`, `gl:vertexAttribIFormat/4` and `gl:vertexAttribLFormat/4`, as well as `gl:vertexArrayAttribFormat/6`, `gl:vertexArrayAttribIFormat/5` and `gl:vertexArrayAttribLFormat/5` specify the organization of data in vertex arrays. The first three calls operate on the bound vertex array object, whereas the last three ones modify the state of a vertex array object with ID `Vaobj`. `Attribindex` specifies the index of the generic vertex attribute array whose data layout is being described, and must be less than the value of `?GL_MAX_VERTEX_ATTRIBS`.

External documentation.

# vertexAttribPointer(Index, Size, Type, Normalized, Stride, Pointer)

    -spec vertexAttribPointer(Index, Size, Type, Normalized, Stride, Pointer) -> ok
                                 when
                                     Index :: i(),
                                     Size :: i(),
                                     Type :: enum(),
                                     Normalized :: 0 | 1,
                                     Stride :: i(),
                                     Pointer :: offset() | mem().

`gl:vertexAttribPointer/6`, `gl:vertexAttribIPointer/5` and `gl:vertexAttribLPointer/5` specify the location and data format of the array of generic vertex attributes at index `Index` to use when rendering. `Size` specifies the number of components per attribute and must be 1, 2, 3, 4, or `?GL_BGRA`. `Type` specifies the data type of each component, and `Stride` specifies the byte stride from one attribute to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays.

External documentation.

# vertexBindingDivisor(Bindingindex, Divisor)

    -spec vertexBindingDivisor(Bindingindex :: i(), Divisor :: i()) -> ok.

`gl:vertexBindingDivisor/2` and `gl:vertexArrayBindingDivisor/3` modify the rate at which generic vertex attributes advance when rendering multiple instances of primitives in a single draw command. If `Divisor` is zero, the attributes using the buffer bound to `Bindingindex` advance once per vertex. If `Divisor` is non-zero, the attributes advance once per `Divisor` instances of the set(s) of vertices being rendered. An attribute is referred to as `instanced` if the corresponding `Divisor` value is non-zero.

External documentation.

# vertexPointer(Size, Type, Stride, Ptr)

    -spec vertexPointer(Size :: i(), Type :: enum(), Stride :: i(), Ptr :: offset() | mem()) -> ok.

`gl:vertexPointer/4` specifies the location and data format of an array of vertex coordinates to use when rendering. `Size` specifies the number of coordinates per vertex, and must be 2, 3, or 4. `Type` specifies the data type of each coordinate, and `Stride` specifies the byte stride from one vertex to the next, allowing vertices and attributes to be packed into a single array or stored in separate arrays. (Single-array storage may be more efficient on some implementations; see `gl:interleavedArrays/3`.)

External documentation.

# viewport(X, Y, Width, Height)

    -spec viewport(X :: i(), Y :: i(), Width :: i(), Height :: i()) -> ok.

`gl:viewport/4` specifies the affine transformation of x and y from normalized device coordinates to window coordinates. Let (x nd y nd) be normalized device coordinates. Then the window coordinates (x w y w) are computed as follows:

External documentation.

# viewportArrayv(First, V)

    -spec viewportArrayv(First :: i(), V :: [{f(), f(), f(), f()}]) -> ok.

`gl:viewportArrayv/2` specifies the parameters for multiple viewports simulataneously. `First` specifies the index of the first viewport to modify and `Count` specifies the number of viewports to modify. `First` must be less than the value of `?GL_MAX_VIEWPORTS`, and `First` + `Count` must be less than or equal to the value of `?GL_MAX_VIEWPORTS`. Viewports whose indices lie outside the range [`First`, `First` + `Count`) are not modified. `V` contains the address of an array of floating point values specifying the left ( x), bottom ( y), width ( w), and height ( h) of each viewport, in that order. x and y give the location of the viewport's lower left corner, and w and h give the width and height of the viewport, respectively. The viewport specifies the affine transformation of x and y from normalized device coordinates to window coordinates. Let (x nd y nd) be normalized device coordinates. Then the window coordinates (x w y w) are computed as follows:

External documentation.

# viewportIndexedf(Index, X, Y, W, H)

    -spec viewportIndexedf(Index :: i(), X :: f(), Y :: f(), W :: f(), H :: f()) -> ok.

Equivalent to `viewportIndexedfv/2`.

# viewportIndexedfv(Index, V)

    -spec viewportIndexedfv(Index :: i(), V :: {f(), f(), f(), f()}) -> ok.

`gl:viewportIndexedf/5` and `gl:viewportIndexedfv/2` specify the parameters for a single viewport. `Index` specifies the index of the viewport to modify. `Index` must be less than the value of `?GL_MAX_VIEWPORTS`. For `gl:viewportIndexedf/5`, `X`, `Y`, `W`, and `H` specify the left, bottom, width and height of the viewport in pixels, respectively. For `gl:viewportIndexedfv/2`, `V` contains the address of an array of floating point values specifying the left ( x), bottom ( y), width ( w), and height ( h) of each viewport, in that order. x and y give the location of the viewport's lower left corner, and w and h give the width and height of the viewport, respectively. The viewport specifies the affine transformation of x and y from normalized device coordinates to window coordinates. Let (x nd y nd) be normalized device coordinates. Then the window coordinates (x w y w) are computed as follows:

External documentation.

# waitSync(Sync, Flags, Timeout)

    -spec waitSync(Sync :: i(), Flags :: i(), Timeout :: i()) -> ok.

`gl:waitSync/3` causes the GL server to block and wait until `Sync` becomes signaled. `Sync` is the name of an existing sync object upon which to wait. `Flags` and `Timeout` are currently not used and must be set to zero and the special value `?GL_TIMEOUT_IGNORED`, respectively

`Flags` and `Timeout` are placeholders for anticipated future extensions of sync object capabilities. They must have these reserved values in order that existing code calling `gl:waitSync/3` operate properly in the presence of such extensions.

External documentation.

# windowPos2d(X, Y)

    -spec windowPos2d(X :: f(), Y :: f()) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos2dv/1

    -spec windowPos2dv({X :: f(), Y :: f()}) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos2f(X, Y)

    -spec windowPos2f(X :: f(), Y :: f()) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos2fv/1

    -spec windowPos2fv({X :: f(), Y :: f()}) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos2i(X, Y)

    -spec windowPos2i(X :: i(), Y :: i()) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos2iv/1

    -spec windowPos2iv({X :: i(), Y :: i()}) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos2s(X, Y)

    -spec windowPos2s(X :: i(), Y :: i()) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos2sv/1

    -spec windowPos2sv({X :: i(), Y :: i()}) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos3d(X, Y, Z)

    -spec windowPos3d(X :: f(), Y :: f(), Z :: f()) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos3dv/1

    -spec windowPos3dv({X :: f(), Y :: f(), Z :: f()}) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos3f(X, Y, Z)

    -spec windowPos3f(X :: f(), Y :: f(), Z :: f()) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos3fv/1

    -spec windowPos3fv({X :: f(), Y :: f(), Z :: f()}) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos3i(X, Y, Z)

    -spec windowPos3i(X :: i(), Y :: i(), Z :: i()) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos3iv/1

    -spec windowPos3iv({X :: i(), Y :: i(), Z :: i()}) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos3s(X, Y, Z)

    -spec windowPos3s(X :: i(), Y :: i(), Z :: i()) -> ok.

Equivalent to `windowPos3sv/1`.

# windowPos3sv/1

    -spec windowPos3sv({X :: i(), Y :: i(), Z :: i()}) -> ok.

The GL maintains a 3D position in window coordinates. This position, called the raster position, is used to position pixel and bitmap write operations. It is maintained with subpixel accuracy. See `gl:bitmap/7`, `gl:drawPixels/5`, and `gl:copyPixels/5`.

External documentation.