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/* SPDX-License-Identifier: GPL-2.0-or-later */
/**
* Shared structures, enums & defines between C++ and GLSL.
* Can also include some math functions but they need to be simple enough to be valid in both
* language.
*/
#ifndef USE_GPU_SHADER_CREATE_INFO
# pragma once
# include "BLI_memory_utils.hh"
# include "DRW_gpu_wrapper.hh"
// # include "eevee_defines.hh"
# include "GPU_shader_shared.h"
namespace blender::eevee {
using draw::Framebuffer;
using draw::Texture;
using draw::TextureFromPool;
#endif
#define UBO_MIN_MAX_SUPPORTED_SIZE 1 << 14
/* -------------------------------------------------------------------- */
/** \name Ray-Tracing
* \{ */
enum eClosureBits : uint32_t {
/** NOTE: Theses are used as stencil bits. So we are limited to 8bits. */
CLOSURE_DIFFUSE = (1u << 0u),
CLOSURE_SSS = (1u << 1u),
CLOSURE_REFLECTION = (1u << 2u),
CLOSURE_REFRACTION = (1u << 3u),
/* Non-stencil bits. */
CLOSURE_TRANSPARENCY = (1u << 8u),
CLOSURE_EMISSION = (1u << 9u),
CLOSURE_HOLDOUT = (1u << 10u),
CLOSURE_VOLUME = (1u << 11u),
CLOSURE_AMBIENT_OCCLUSION = (1u << 12u),
};
/** \} */
/* -------------------------------------------------------------------- */
/** \name Utility Texture
* \{ */
#define UTIL_TEX_SIZE 64
#define UTIL_BTDF_LAYER_COUNT 16
/* Scale and bias to avoid interpolation of the border pixel.
* Remap UVs to the border pixels centers. */
#define UTIL_TEX_UV_SCALE ((UTIL_TEX_SIZE - 1.0f) / UTIL_TEX_SIZE)
#define UTIL_TEX_UV_BIAS (0.5f / UTIL_TEX_SIZE)
#define UTIL_BLUE_NOISE_LAYER 0
#define UTIL_LTC_MAT_LAYER 1
#define UTIL_LTC_MAG_LAYER 2
#define UTIL_BSDF_LAYER 2
#define UTIL_BTDF_LAYER 3
#define UTIL_DISK_INTEGRAL_LAYER 3
#define UTIL_DISK_INTEGRAL_COMP 2
#ifndef __cplusplus
/* Fetch texel. Wrapping if above range. */
float4 utility_tx_fetch(sampler2DArray util_tx, float2 texel, float layer)
{
return texelFetch(util_tx, int3(int2(texel) % UTIL_TEX_SIZE, layer), 0);
}
/* Sample at uv position. Filtered & Wrapping enabled. */
float4 utility_tx_sample(sampler2DArray util_tx, float2 uv, float layer)
{
return textureLod(util_tx, float3(uv, layer), 0.0);
}
#endif
/** \} */
#ifdef __cplusplus
} // namespace blender::eevee
#endif
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