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// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <cstring>
#include "common/cityhash.h"
#include "common/settings.h" // for enum class Settings::ShaderBackend
#include "video_core/renderer_opengl/gl_compute_pipeline.h"
#include "video_core/renderer_opengl/gl_shader_manager.h"
#include "video_core/renderer_opengl/gl_shader_util.h"
namespace OpenGL {
using Shader::ImageBufferDescriptor;
using Tegra::Texture::TexturePair;
using VideoCommon::ImageId;
constexpr u32 MAX_TEXTURES = 64;
constexpr u32 MAX_IMAGES = 16;
size_t ComputePipelineKey::Hash() const noexcept {
return static_cast<size_t>(
Common::CityHash64(reinterpret_cast<const char*>(this), sizeof *this));
}
bool ComputePipelineKey::operator==(const ComputePipelineKey& rhs) const noexcept {
return std::memcmp(this, &rhs, sizeof *this) == 0;
}
ComputePipeline::ComputePipeline(const Device& device, TextureCache& texture_cache_,
BufferCache& buffer_cache_, ProgramManager& program_manager_,
const Shader::Info& info_, std::string code,
std::vector<u32> code_v)
: texture_cache{texture_cache_}, buffer_cache{buffer_cache_},
program_manager{program_manager_}, info{info_} {
switch (device.GetShaderBackend()) {
case Settings::ShaderBackend::GLSL:
source_program = CreateProgram(code, GL_COMPUTE_SHADER);
break;
case Settings::ShaderBackend::GLASM:
assembly_program = CompileProgram(code, GL_COMPUTE_PROGRAM_NV);
break;
case Settings::ShaderBackend::SPIRV:
source_program = CreateProgram(code_v, GL_COMPUTE_SHADER);
break;
}
std::copy_n(info.constant_buffer_used_sizes.begin(), uniform_buffer_sizes.size(),
uniform_buffer_sizes.begin());
num_texture_buffers = Shader::NumDescriptors(info.texture_buffer_descriptors);
num_image_buffers = Shader::NumDescriptors(info.image_buffer_descriptors);
const u32 num_textures{num_texture_buffers + Shader::NumDescriptors(info.texture_descriptors)};
ASSERT(num_textures <= MAX_TEXTURES);
const u32 num_images{num_image_buffers + Shader::NumDescriptors(info.image_descriptors)};
ASSERT(num_images <= MAX_IMAGES);
const bool is_glasm{assembly_program.handle != 0};
const u32 num_storage_buffers{Shader::NumDescriptors(info.storage_buffers_descriptors)};
use_storage_buffers =
!is_glasm || num_storage_buffers < device.GetMaxGLASMStorageBufferBlocks();
writes_global_memory = !use_storage_buffers &&
std::ranges::any_of(info.storage_buffers_descriptors,
[](const auto& desc) { return desc.is_written; });
}
void ComputePipeline::Configure() {
buffer_cache.SetComputeUniformBufferState(info.constant_buffer_mask, &uniform_buffer_sizes);
buffer_cache.UnbindComputeStorageBuffers();
size_t ssbo_index{};
for (const auto& desc : info.storage_buffers_descriptors) {
ASSERT(desc.count == 1);
buffer_cache.BindComputeStorageBuffer(ssbo_index, desc.cbuf_index, desc.cbuf_offset,
desc.is_written);
++ssbo_index;
}
texture_cache.SynchronizeComputeDescriptors();
boost::container::static_vector<VideoCommon::ImageViewInOut, MAX_TEXTURES + MAX_IMAGES> views;
std::array<GLuint, MAX_TEXTURES> samplers;
std::array<GLuint, MAX_TEXTURES> textures;
std::array<GLuint, MAX_IMAGES> images;
GLsizei sampler_binding{};
GLsizei texture_binding{};
GLsizei image_binding{};
const auto& qmd{kepler_compute->launch_description};
const auto& cbufs{qmd.const_buffer_config};
const bool via_header_index{qmd.linked_tsc != 0};
const auto read_handle{[&](const auto& desc, u32 index) {
ASSERT(((qmd.const_buffer_enable_mask >> desc.cbuf_index) & 1) != 0);
const u32 index_offset{index << desc.size_shift};
const u32 offset{desc.cbuf_offset + index_offset};
const GPUVAddr addr{cbufs[desc.cbuf_index].Address() + offset};
if constexpr (std::is_same_v<decltype(desc), const Shader::TextureDescriptor&> ||
std::is_same_v<decltype(desc), const Shader::TextureBufferDescriptor&>) {
if (desc.has_secondary) {
ASSERT(((qmd.const_buffer_enable_mask >> desc.secondary_cbuf_index) & 1) != 0);
const u32 secondary_offset{desc.secondary_cbuf_offset + index_offset};
const GPUVAddr separate_addr{cbufs[desc.secondary_cbuf_index].Address() +
secondary_offset};
const u32 lhs_raw{gpu_memory->Read<u32>(addr)};
const u32 rhs_raw{gpu_memory->Read<u32>(separate_addr)};
return TexturePair(lhs_raw | rhs_raw, via_header_index);
}
}
return TexturePair(gpu_memory->Read<u32>(addr), via_header_index);
}};
const auto add_image{[&](const auto& desc, bool blacklist) {
for (u32 index = 0; index < desc.count; ++index) {
const auto handle{read_handle(desc, index)};
views.push_back({
.index = handle.first,
.blacklist = blacklist,
.id = {},
});
}
}};
for (const auto& desc : info.texture_buffer_descriptors) {
for (u32 index = 0; index < desc.count; ++index) {
const auto handle{read_handle(desc, index)};
views.push_back({handle.first});
samplers[sampler_binding++] = 0;
}
}
for (const auto& desc : info.image_buffer_descriptors) {
add_image(desc, false);
}
for (const auto& desc : info.texture_descriptors) {
for (u32 index = 0; index < desc.count; ++index) {
const auto handle{read_handle(desc, index)};
views.push_back({handle.first});
Sampler* const sampler = texture_cache.GetComputeSampler(handle.second);
samplers[sampler_binding++] = sampler->Handle();
}
}
for (const auto& desc : info.image_descriptors) {
add_image(desc, desc.is_written);
}
texture_cache.FillComputeImageViews(std::span(views.data(), views.size()));
if (assembly_program.handle != 0) {
program_manager.BindComputeAssemblyProgram(assembly_program.handle);
} else {
program_manager.BindComputeProgram(source_program.handle);
}
buffer_cache.UnbindComputeTextureBuffers();
size_t texbuf_index{};
const auto add_buffer{[&](const auto& desc) {
constexpr bool is_image = std::is_same_v<decltype(desc), const ImageBufferDescriptor&>;
for (u32 i = 0; i < desc.count; ++i) {
bool is_written{false};
if constexpr (is_image) {
is_written = desc.is_written;
}
ImageView& image_view{texture_cache.GetImageView(views[texbuf_index].id)};
buffer_cache.BindComputeTextureBuffer(texbuf_index, image_view.GpuAddr(),
image_view.BufferSize(), image_view.format,
is_written, is_image);
++texbuf_index;
}
}};
std::ranges::for_each(info.texture_buffer_descriptors, add_buffer);
std::ranges::for_each(info.image_buffer_descriptors, add_buffer);
buffer_cache.UpdateComputeBuffers();
buffer_cache.runtime.SetEnableStorageBuffers(use_storage_buffers);
buffer_cache.runtime.SetImagePointers(textures.data(), images.data());
buffer_cache.BindHostComputeBuffers();
const VideoCommon::ImageViewInOut* views_it{views.data() + num_texture_buffers +
num_image_buffers};
texture_binding += num_texture_buffers;
image_binding += num_image_buffers;
u32 texture_scaling_mask{};
for (const auto& desc : info.texture_descriptors) {
for (u32 index = 0; index < desc.count; ++index) {
ImageView& image_view{texture_cache.GetImageView((views_it++)->id)};
textures[texture_binding] = image_view.Handle(desc.type);
if (texture_cache.IsRescaling(image_view)) {
texture_scaling_mask |= 1u << texture_binding;
}
++texture_binding;
}
}
u32 image_scaling_mask{};
for (const auto& desc : info.image_descriptors) {
for (u32 index = 0; index < desc.count; ++index) {
ImageView& image_view{texture_cache.GetImageView((views_it++)->id)};
if (desc.is_written) {
texture_cache.MarkModification(image_view.image_id);
}
images[image_binding] = image_view.StorageView(desc.type, desc.format);
if (texture_cache.IsRescaling(image_view)) {
image_scaling_mask |= 1u << image_binding;
}
++image_binding;
}
}
if (info.uses_rescaling_uniform) {
const f32 float_texture_scaling_mask{Common::BitCast<f32>(texture_scaling_mask)};
const f32 float_image_scaling_mask{Common::BitCast<f32>(image_scaling_mask)};
if (assembly_program.handle != 0) {
glProgramLocalParameter4fARB(GL_COMPUTE_PROGRAM_NV, 0, float_texture_scaling_mask,
float_image_scaling_mask, 0.0f, 0.0f);
} else {
glProgramUniform4f(source_program.handle, 0, float_texture_scaling_mask,
float_image_scaling_mask, 0.0f, 0.0f);
}
}
if (texture_binding != 0) {
ASSERT(texture_binding == sampler_binding);
glBindTextures(0, texture_binding, textures.data());
glBindSamplers(0, sampler_binding, samplers.data());
}
if (image_binding != 0) {
glBindImageTextures(0, image_binding, images.data());
}
}
} // namespace OpenGL
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