GPU_shader_shared_utils.hh

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/* SPDX-FileCopyrightText: 2022 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#pragma once
 
#ifdef GLSL_CPP_STUBS
/* Silence macros when compiling for shaders. */
#  define BLI_STATIC_ASSERT(cond, msg)
#  define BLI_STATIC_ASSERT_ALIGN(type_, align_)
#  define BLI_STATIC_ASSERT_SIZE(type_, size_)
#  define ENUM_OPERATORS(a, b)
#  define UNUSED_VARS(a) (void)a
/* Math function renaming. */
#  define cosf cos
#  define sinf sin
#  define tanf tan
#  define acosf acos
#  define asinf asin
#  define atanf atan
#  define floorf floor
#  define ceilf ceil
#  define sqrtf sqrt
#  define expf exp
 
#elif defined(GPU_SHADER)
/* Silence macros when compiling for shaders. */
#  define BLI_STATIC_ASSERT(cond, msg)
#  define BLI_STATIC_ASSERT_ALIGN(type_, align_)
#  define BLI_STATIC_ASSERT_SIZE(type_, size_)
#  define ATTR_FALLTHROUGH
#  define ENUM_OPERATORS(a, b)
#  define UNUSED_VARS(a)
/* Math function renaming. */
#  define cosf cos
#  define sinf sin
#  define tanf tan
#  define acosf acos
#  define asinf asin
#  define atanf atan
#  define floorf floor
#  define ceilf ceil
#  define sqrtf sqrt
#  define expf exp
 
#else                /* C / C++ */
#  ifndef GPU_SHADER /* Avoid parsing this into shader code. */
 
#    include "BLI_assert.h"
#    include "BLI_sys_types.h"
 
#    include <math.h>
 
#    include "BLI_math_matrix_types.hh"
#    include "BLI_math_vector_types.hh"
 
using bool32_t = int32_t;
// using bool2 = blender::int2; /* Size is not consistent across backend. */
// using bool3 = blender::int3; /* Size is not consistent across backend. */
// using bool4 = blender::int4; /* Size is not consistent across backend. */
 
using blender::float2;
using blender::float4;
using blender::int2;
using blender::int4;
using blender::uint2;
using blender::uint4;
using blender::float3;
using blender::int3;
using blender::uint3;
using packed_float3 = blender::float3;
using packed_int3 = blender::int3;
using packed_uint3 = blender::uint3;
 
using blender::float2x2;
// using blender::float3x2; /* Does not follow alignment rules of GPU. */
using blender::float4x2;
// using blender::float2x3; /* Does not follow alignment rules of GPU. */
// using blender::float3x3; /* Does not follow alignment rules of GPU. */
// using blender::float4x3; /* Does not follow alignment rules of GPU. */
using blender::float2x4;
using blender::float3x4;
using blender::float4x4;
 
#  endif
 
/* For assert support. */
#  if defined(GPU_VERTEX_SHADER)
#    define GPU_THREAD uint3(gl_VertexID, gl_InstanceID, 0)
#  elif defined(GPU_FRAGMENT_SHADER)
#    define GPU_THREAD uint3(gl_FragCoord.x, gl_FragCoord.y, 0)
#  elif defined(GPU_COMPUTE_SHADER)
#    define GPU_THREAD gl_GlobalInvocationID
#  else
#    define GPU_THREAD error_not_in_a_shader_question_mark
#  endif
#endif