TEXTUREQUERYLOD(3G)

NAME
textureQueryLod - compute the level-of-detail that would be used to sample from a texture

DECLARATION

vec2 textureQueryLod(gsampler1D sampler, float P);

vec2 textureQueryLod(gsampler2D sampler, vec2 P);

vec2 textureQueryLod(gsampler3D sampler, vec3 P);

vec2 textureQueryLod(gsamplerCube sampler, vec3 P);

vec2 textureQueryLod(gsampler1DArray sampler, float P);

vec2 textureQueryLod(gsampler2DArray sampler, vec2 P);

vec2 textureQueryLod(gsamplerCubeArray sampler, vec3 P);

vec2 textureQueryLod(sampler1DShadow sampler, float P);

vec2 textureQueryLod(sampler2DShadow sampler, vec2 P);

vec2 textureQueryLod(samplerCubeShadow sampler, vec3 P);

vec2 textureQueryLod(sampler1DArrayShadow sampler, float P);

vec2 textureQueryLod(sampler2DArrayShadow sampler, vec2 P);

vec2 textureQueryLod(samplerCubeArrayShadow sampler, vec3 P);

PARAMETERS

sampler
    Specifies the sampler to which the texture whose level-of-detail will be queried is bound.

P
    Specifies the texture coordinates at which the level-of-detail will be queried.

DESCRIPTION

Available only in the fragment shader, textureQueryLod computes the level-of-detail that would be used to sample from a texture. The mipmap array(s) that would be accessed is returned in the x component of the return value. The computed level-of-detail relative to the base level is returned in the y component of the return value.

If called on an incomplete texture, the result of the operation is undefined.

VERSION SUPPORT
 | OpenGL Shading Language Version
Function Name | 1.10 | 1.20 | 1.30 | 1.40 | 1.50 | 3.30 | 4.00 | 4.10 | 4.20 | 4.30 | 4.40 | 4.50
textureQueryLod | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔

SEE ALSO

texelFetch(), texelFetchOffset(), texture(), textureGather(), textureGatherOffset(), textureGatherOffsets(), textureGrad(), textureGradOffset(), textureLod(), textureLodOffset(), textureOffset(), textureProj(), textureProjGrad(), textureProjGradOffset(), textureProjLod(), textureProjLodOffset(), textureProjOffset(), textureSize()

COPYRIGHT

Copyright © 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. https://opencontent.org/openpub/.

COPYRIGHT
Copyright © 2011-2014 Khronos Group