/*
 * Copyright 2011, Blender Foundation.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#ifndef __KERNEL_COMPAT_OPENCL_H__
#define __KERNEL_COMPAT_OPENCL_H__

#define __KERNEL_GPU__
#define __KERNEL_OPENCL__

/* no namespaces in opencl */
#define CCL_NAMESPACE_BEGIN
#define CCL_NAMESPACE_END

#ifdef __CL_NO_FLOAT3__
#define float3 float4
#endif

#ifdef __CL_NOINLINE__
#define __noinline __attribute__((noinline))
#else
#define __noinline
#endif

/* in opencl all functions are device functions, so leave this empty */
#define __device
#define __device_inline __device
#define __device_noinline  __device __noinline

/* no assert in opencl */
#define kernel_assert(cond)

/* manual implementation of interpolated 1D lookup */
__device float kernel_tex_interp_(__global float *data, int width, float x)
{
	x = clamp(x, 0.0f, 1.0f)*width;

	int index = min((int)x, width-1);
	int nindex = min(index+1, width-1);
	float t = x - index;

	return (1.0f - t)*data[index] + t*data[nindex];
}

/* make_type definitions with opencl style element initializers */
#ifdef make_float2
#undef make_float2
#endif
#ifdef make_float3
#undef make_float3
#endif
#ifdef make_float4
#undef make_float4
#endif
#ifdef make_int2
#undef make_int2
#endif
#ifdef make_int3
#undef make_int3
#endif
#ifdef make_int4
#undef make_int4
#endif

#define make_float2(x, y) ((float2)(x, y))
#ifdef __CL_NO_FLOAT3__
#define make_float3(x, y, z) ((float4)(x, y, z, 0.0))
#else
#define make_float3(x, y, z) ((float3)(x, y, z))
#endif
#define make_float4(x, y, z, w) ((float4)(x, y, z, w))
#define make_int2(x, y) ((int2)(x, y))
#define make_int3(x, y, z) ((int3)(x, y, z))
#define make_int4(x, y, z, w) ((int4)(x, y, z, w))

/* math functions */
#define __uint_as_float(x) as_float(x)
#define __float_as_uint(x) as_uint(x)
#define __int_as_float(x) as_float(x)
#define __float_as_int(x) as_int(x)
#define sqrtf(x) sqrt(((float)x))
#define cosf(x) cos(((float)x))
#define sinf(x) sin(((float)x))
#define powf(x, y) pow(((float)x), ((float)y))
#define fabsf(x) fabs(((float)x))
#define copysignf(x, y) copysign(((float)x), ((float)y))
#define cosf(x) cos(((float)x))
#define asinf(x) asin(((float)x))
#define acosf(x) acos(((float)x))
#define atanf(x) atan(((float)x))
#define tanf(x) tan(((float)x))
#define logf(x) log(((float)x))
#define floorf(x) floor(((float)x))
#define expf(x) exp(((float)x))
#define hypotf(x, y) hypot(((float)x), ((float)y))
#define atan2f(x, y) atan2(((float)x), ((float)y))
#define fmaxf(x, y) fmax(((float)x), ((float)y))
#define fminf(x, y) fmin(((float)x), ((float)y))

/* data lookup defines */
#define kernel_data (*kg->data)
#define kernel_tex_interp(t, x, size) kernel_tex_interp_(kg->t, size, x)
#define kernel_tex_fetch(t, index) kg->t[index]

/* define NULL */
#define NULL 0

#include "util_types.h"

#endif /* __KERNEL_COMPAT_OPENCL_H__ */

