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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2021 Blender Foundation.
*/
/** \file
* \ingroup eevee
*
* Shading passes contain drawcalls specific to shading pipelines.
* They are shared across views.
* This file is only for shading passes. Other passes are declared in their own module.
*/
#pragma once
#include "DRW_render.h"
/* TODO(fclem): Move it to GPU/DRAW. */
#include "../eevee/eevee_lut.h"
namespace blender::eevee {
class Instance;
/* -------------------------------------------------------------------- */
/** \name World Pipeline
*
* Render world values.
* \{ */
class WorldPipeline {
private:
Instance &inst_;
DRWPass *world_ps_ = nullptr;
public:
WorldPipeline(Instance &inst) : inst_(inst){};
void sync(GPUMaterial *gpumat);
void render();
};
/** \} */
/* -------------------------------------------------------------------- */
/** \name Forward Pass
*
* Handles alpha blended surfaces and NPR materials (using Closure to RGBA).
* \{ */
class ForwardPipeline {
private:
Instance &inst_;
DRWPass *prepass_ps_ = nullptr;
DRWPass *prepass_velocity_ps_ = nullptr;
DRWPass *prepass_culled_ps_ = nullptr;
DRWPass *prepass_culled_velocity_ps_ = nullptr;
DRWPass *opaque_ps_ = nullptr;
DRWPass *opaque_culled_ps_ = nullptr;
DRWPass *transparent_ps_ = nullptr;
// GPUTexture *input_screen_radiance_tx_ = nullptr;
public:
ForwardPipeline(Instance &inst) : inst_(inst){};
void sync();
DRWShadingGroup *material_add(::Material *blender_mat, GPUMaterial *gpumat)
{
return (GPU_material_flag_get(gpumat, GPU_MATFLAG_TRANSPARENT)) ?
material_transparent_add(blender_mat, gpumat) :
material_opaque_add(blender_mat, gpumat);
}
DRWShadingGroup *prepass_add(::Material *blender_mat, GPUMaterial *gpumat, bool has_motion)
{
return (GPU_material_flag_get(gpumat, GPU_MATFLAG_TRANSPARENT)) ?
prepass_transparent_add(blender_mat, gpumat) :
prepass_opaque_add(blender_mat, gpumat, has_motion);
}
DRWShadingGroup *material_opaque_add(::Material *blender_mat, GPUMaterial *gpumat);
DRWShadingGroup *prepass_opaque_add(::Material *blender_mat,
GPUMaterial *gpumat,
bool has_motion);
DRWShadingGroup *material_transparent_add(::Material *blender_mat, GPUMaterial *gpumat);
DRWShadingGroup *prepass_transparent_add(::Material *blender_mat, GPUMaterial *gpumat);
void render(const DRWView *view,
Framebuffer &prepass_fb,
Framebuffer &combined_fb,
GPUTexture *depth_tx,
GPUTexture *combined_tx);
};
/** \} */
/* -------------------------------------------------------------------- */
/** \name Utility texture
*
* 64x64 2D array texture containing LUT tables and blue noises.
* \{ */
class UtilityTexture : public Texture {
struct Layer {
float data[UTIL_TEX_SIZE * UTIL_TEX_SIZE][4];
};
static constexpr int lut_size = UTIL_TEX_SIZE;
static constexpr int lut_size_sqr = lut_size * lut_size;
static constexpr int layer_count = 4 + UTIL_BTDF_LAYER_COUNT;
public:
UtilityTexture() : Texture("UtilityTx", GPU_RGBA16F, int2(lut_size), layer_count, nullptr)
{
#ifdef RUNTIME_LUT_CREATION
float *bsdf_ggx_lut = EEVEE_lut_update_ggx_brdf(lut_size);
float(*btdf_ggx_lut)[lut_size_sqr * 2] = (float(*)[lut_size_sqr * 2])
EEVEE_lut_update_ggx_btdf(lut_size, UTIL_BTDF_LAYER_COUNT);
#else
const float *bsdf_ggx_lut = bsdf_split_sum_ggx;
const float(*btdf_ggx_lut)[lut_size_sqr * 2] = btdf_split_sum_ggx;
#endif
Vector<Layer> data(layer_count);
{
Layer &layer = data[UTIL_BLUE_NOISE_LAYER];
memcpy(layer.data, blue_noise, sizeof(layer));
}
{
Layer &layer = data[UTIL_LTC_MAT_LAYER];
memcpy(layer.data, ltc_mat_ggx, sizeof(layer));
}
{
Layer &layer = data[UTIL_LTC_MAG_LAYER];
for (auto i : IndexRange(lut_size_sqr)) {
layer.data[i][0] = bsdf_ggx_lut[i * 2 + 0];
layer.data[i][1] = bsdf_ggx_lut[i * 2 + 1];
layer.data[i][2] = ltc_mag_ggx[i * 2 + 0];
layer.data[i][3] = ltc_mag_ggx[i * 2 + 1];
}
BLI_assert(UTIL_LTC_MAG_LAYER == UTIL_BSDF_LAYER);
}
{
Layer &layer = data[UTIL_DISK_INTEGRAL_LAYER];
for (auto i : IndexRange(lut_size_sqr)) {
layer.data[i][UTIL_DISK_INTEGRAL_COMP] = ltc_disk_integral[i];
}
}
{
for (auto layer_id : IndexRange(16)) {
Layer &layer = data[3 + layer_id];
for (auto i : IndexRange(lut_size_sqr)) {
layer.data[i][0] = btdf_ggx_lut[layer_id][i * 2 + 0];
layer.data[i][1] = btdf_ggx_lut[layer_id][i * 2 + 1];
}
}
}
GPU_texture_update_mipmap(*this, 0, GPU_DATA_FLOAT, data.data());
}
~UtilityTexture(){};
};
/** \} */
/* -------------------------------------------------------------------- */
/** \name Pipelines
*
* Contains Shading passes. Shared between views. Objects will subscribe to at least one of them.
* \{ */
class PipelineModule {
public:
WorldPipeline world;
// DeferredPipeline deferred;
ForwardPipeline forward;
// ShadowPipeline shadow;
// VelocityPipeline velocity;
UtilityTexture utility_tx;
public:
PipelineModule(Instance &inst) : world(inst), forward(inst){};
void sync()
{
// deferred.sync();
forward.sync();
// shadow.sync();
// velocity.sync();
}
DRWShadingGroup *material_add(::Material *blender_mat,
GPUMaterial *gpumat,
eMaterialPipeline pipeline_type)
{
switch (pipeline_type) {
case MAT_PIPE_DEFERRED_PREPASS:
// return deferred.prepass_add(blender_mat, gpumat, false);
break;
case MAT_PIPE_DEFERRED_PREPASS_VELOCITY:
// return deferred.prepass_add(blender_mat, gpumat, true);
break;
case MAT_PIPE_FORWARD_PREPASS:
return forward.prepass_add(blender_mat, gpumat, false);
case MAT_PIPE_FORWARD_PREPASS_VELOCITY:
return forward.prepass_add(blender_mat, gpumat, true);
case MAT_PIPE_DEFERRED:
// return deferred.material_add(blender_mat, gpumat);
break;
case MAT_PIPE_FORWARD:
return forward.material_add(blender_mat, gpumat);
case MAT_PIPE_VOLUME:
/* TODO(fclem) volume pass. */
return nullptr;
case MAT_PIPE_SHADOW:
// return shadow.material_add(blender_mat, gpumat);
break;
}
return nullptr;
}
};
/** \} */
} // namespace blender::eevee
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