// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <array>
#include <bitset>
#include <memory>
#include <string>
#include <string_view>
#include <tuple>
#include <utility>
#include <glad/glad.h>
#include "common/alignment.h"
#include "common/assert.h"
#include "common/logging/log.h"
#include "common/math_util.h"
#include "common/microprofile.h"
#include "common/scope_exit.h"
#include "core/core.h"
#include "core/hle/kernel/process.h"
#include "core/memory.h"
#include "core/settings.h"
#include "video_core/engines/kepler_compute.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/engines/shader_type.h"
#include "video_core/memory_manager.h"
#include "video_core/renderer_opengl/gl_device.h"
#include "video_core/renderer_opengl/gl_query_cache.h"
#include "video_core/renderer_opengl/gl_rasterizer.h"
#include "video_core/renderer_opengl/gl_shader_cache.h"
#include "video_core/renderer_opengl/gl_texture_cache.h"
#include "video_core/renderer_opengl/maxwell_to_gl.h"
#include "video_core/renderer_opengl/renderer_opengl.h"
#include "video_core/shader_cache.h"
#include "video_core/texture_cache/texture_cache.h"
namespace OpenGL {
using Maxwell = Tegra::Engines::Maxwell3D::Regs;
using Tegra::Engines::ShaderType;
using VideoCore::Surface::PixelFormat;
using VideoCore::Surface::SurfaceTarget;
using VideoCore::Surface::SurfaceType;
MICROPROFILE_DEFINE(OpenGL_Drawing, "OpenGL", "Drawing", MP_RGB(128, 128, 192));
MICROPROFILE_DEFINE(OpenGL_Clears, "OpenGL", "Clears", MP_RGB(128, 128, 192));
MICROPROFILE_DEFINE(OpenGL_Blits, "OpenGL", "Blits", MP_RGB(128, 128, 192));
MICROPROFILE_DEFINE(OpenGL_CacheManagement, "OpenGL", "Cache Management", MP_RGB(100, 255, 100));
namespace {
constexpr size_t NUM_CONST_BUFFERS_PER_STAGE = 18;
constexpr size_t NUM_CONST_BUFFERS_BYTES_PER_STAGE =
NUM_CONST_BUFFERS_PER_STAGE * Maxwell::MaxConstBufferSize;
constexpr size_t TOTAL_CONST_BUFFER_BYTES =
NUM_CONST_BUFFERS_BYTES_PER_STAGE * Maxwell::MaxShaderStage;
constexpr size_t NUM_SUPPORTED_VERTEX_ATTRIBUTES = 16;
constexpr size_t NUM_SUPPORTED_VERTEX_BINDINGS = 16;
struct TextureHandle {
constexpr TextureHandle(u32 data, bool via_header_index) {
const Tegra::Texture::TextureHandle handle{data};
image = handle.tic_id;
sampler = via_header_index ? image : handle.tsc_id.Value();
}
u32 image;
u32 sampler;
};
template <typename Engine, typename Entry>
TextureHandle GetTextureInfo(const Engine& engine, bool via_header_index, const Entry& entry,
ShaderType shader_type, size_t index = 0) {
if constexpr (std::is_same_v<Entry, SamplerEntry>) {
if (entry.is_separated) {
const u32 buffer_1 = entry.buffer;
const u32 buffer_2 = entry.secondary_buffer;
const u32 offset_1 = entry.offset;
const u32 offset_2 = entry.secondary_offset;
const u32 handle_1 = engine.AccessConstBuffer32(shader_type, buffer_1, offset_1);
const u32 handle_2 = engine.AccessConstBuffer32(shader_type, buffer_2, offset_2);
return TextureHandle(handle_1 | handle_2, via_header_index);
}
}
if (entry.is_bindless) {
const u32 raw = engine.AccessConstBuffer32(shader_type, entry.buffer, entry.offset);
return TextureHandle(raw, via_header_index);
}
const u32 buffer = engine.GetBoundBuffer();
const u64 offset = (entry.offset + index) * sizeof(u32);
return TextureHandle(engine.AccessConstBuffer32(shader_type, buffer, offset), via_header_index);
}
/// Translates hardware transform feedback indices
/// @param location Hardware location
/// @return Pair of ARB_transform_feedback3 token stream first and third arguments
/// @note Read https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_transform_feedback3.txt
std::pair<GLint, GLint> TransformFeedbackEnum(u8 location) {
const u8 index = location / 4;
if (index >= 8 && index <= 39) {
return {GL_GENERIC_ATTRIB_NV, index - 8};
}
if (index >= 48 && index <= 55) {
return {GL_TEXTURE_COORD_NV, index - 48};
}
switch (index) {
case 7:
return {GL_POSITION, 0};
case 40:
return {GL_PRIMARY_COLOR_NV, 0};
case 41:
return {GL_SECONDARY_COLOR_NV, 0};
case 42:
return {GL_BACK_PRIMARY_COLOR_NV, 0};
case 43:
return {GL_BACK_SECONDARY_COLOR_NV, 0};
}
UNIMPLEMENTED_MSG("index={}", index);
return {GL_POSITION, 0};
}
void oglEnable(GLenum cap, bool state) {
(state ? glEnable : glDisable)(cap);
}
ImageViewType ImageViewTypeFromEntry(const SamplerEntry& entry) {
if (entry.is_buffer) {
return ImageViewType::Buffer;
}
switch (entry.type) {
case Tegra::Shader::TextureType::Texture1D:
return entry.is_array ? ImageViewType::e1DArray : ImageViewType::e1D;
case Tegra::Shader::TextureType::Texture2D:
return entry.is_array ? ImageViewType::e2DArray : ImageViewType::e2D;
case Tegra::Shader::TextureType::Texture3D:
return ImageViewType::e3D;
case Tegra::Shader::TextureType::TextureCube:
return entry.is_array ? ImageViewType::CubeArray : ImageViewType::Cube;
}
UNREACHABLE();
return ImageViewType::e2D;
}
ImageViewType ImageViewTypeFromEntry(const ImageEntry& entry) {
switch (entry.type) {
case Tegra::Shader::ImageType::Texture1D:
return ImageViewType::e1D;
case Tegra::Shader::ImageType::Texture1DArray:
return ImageViewType::e1DArray;
case Tegra::Shader::ImageType::Texture2D:
return ImageViewType::e2D;
case Tegra::Shader::ImageType::Texture2DArray:
return ImageViewType::e2DArray;
case Tegra::Shader::ImageType::Texture3D:
return ImageViewType::e3D;
case Tegra::Shader::ImageType::TextureBuffer:
return ImageViewType::Buffer;
}
UNREACHABLE();
return ImageViewType::e2D;
}
} // Anonymous namespace
RasterizerOpenGL::RasterizerOpenGL(Core::Frontend::EmuWindow& emu_window_, Tegra::GPU& gpu_,
Core::Memory::Memory& cpu_memory_, const Device& device_,
const Vulkan::Device* vulkan_device,
Vulkan::MemoryAllocator* vulkan_memory_allocator,
ScreenInfo& screen_info_, ProgramManager& program_manager_,
StateTracker& state_tracker_)
: RasterizerAccelerated(cpu_memory_), gpu(gpu_), maxwell3d(gpu.Maxwell3D()),
kepler_compute(gpu.KeplerCompute()), gpu_memory(gpu.MemoryManager()), device(device_),
screen_info(screen_info_), program_manager(program_manager_), state_tracker(state_tracker_),
texture_cache_runtime(device, program_manager, state_tracker),
texture_cache(texture_cache_runtime, *this, maxwell3d, kepler_compute, gpu_memory),
buffer_cache_runtime(device, vulkan_device, vulkan_memory_allocator),
buffer_cache(*this, maxwell3d, kepler_compute, gpu_memory, cpu_memory_, buffer_cache_runtime),
shader_cache(*this, emu_window_, gpu, maxwell3d, kepler_compute, gpu_memory, device),
query_cache(*this, maxwell3d, gpu_memory),
fence_manager(*this, gpu, texture_cache, buffer_cache, query_cache),
async_shaders(emu_window_) {
if (device.UseAsynchronousShaders()) {
async_shaders.AllocateWorkers();
}
}
RasterizerOpenGL::~RasterizerOpenGL() = default;
void RasterizerOpenGL::SyncVertexFormats() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::VertexFormats]) {
return;
}
flags[Dirty::VertexFormats] = false;
// Use the vertex array as-is, assumes that the data is formatted correctly for OpenGL. Enables
// the first 16 vertex attributes always, as we don't know which ones are actually used until
// shader time. Note, Tegra technically supports 32, but we're capping this to 16 for now to
// avoid OpenGL errors.
// TODO(Subv): Analyze the shader to identify which attributes are actually used and don't
// assume every shader uses them all.
for (std::size_t index = 0; index < NUM_SUPPORTED_VERTEX_ATTRIBUTES; ++index) {
if (!flags[Dirty::VertexFormat0 + index]) {
continue;
}
flags[Dirty::VertexFormat0 + index] = false;
const auto attrib = maxwell3d.regs.vertex_attrib_format[index];
const auto gl_index = static_cast<GLuint>(index);
// Disable constant attributes.
if (attrib.IsConstant()) {
glDisableVertexAttribArray(gl_index);
continue;
}
glEnableVertexAttribArray(gl_index);
if (attrib.type == Maxwell::VertexAttribute::Type::SignedInt ||
attrib.type == Maxwell::VertexAttribute::Type::UnsignedInt) {
glVertexAttribIFormat(gl_index, attrib.ComponentCount(),
MaxwellToGL::VertexFormat(attrib), attrib.offset);
} else {
glVertexAttribFormat(gl_index, attrib.ComponentCount(),
MaxwellToGL::VertexFormat(attrib),
attrib.IsNormalized() ? GL_TRUE : GL_FALSE, attrib.offset);
}
glVertexAttribBinding(gl_index, attrib.buffer);
}
}
void RasterizerOpenGL::SyncVertexInstances() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::VertexInstances]) {
return;
}
flags[Dirty::VertexInstances] = false;
const auto& regs = maxwell3d.regs;
for (std::size_t index = 0; index < NUM_SUPPORTED_VERTEX_ATTRIBUTES; ++index) {
if (!flags[Dirty::VertexInstance0 + index]) {
continue;
}
flags[Dirty::VertexInstance0 + index] = false;
const auto gl_index = static_cast<GLuint>(index);
const bool instancing_enabled = regs.instanced_arrays.IsInstancingEnabled(gl_index);
const GLuint divisor = instancing_enabled ? regs.vertex_array[index].divisor : 0;
glVertexBindingDivisor(gl_index, divisor);
}
}
void RasterizerOpenGL::SetupShaders(bool is_indexed) {
u32 clip_distances = 0;
std::array<Shader*, Maxwell::MaxShaderStage> shaders{};
image_view_indices.clear();
sampler_handles.clear();
texture_cache.SynchronizeGraphicsDescriptors();
for (std::size_t index = 0; index < Maxwell::MaxShaderProgram; ++index) {
const auto& shader_config = maxwell3d.regs.shader_config[index];
const auto program{static_cast<Maxwell::ShaderProgram>(index)};
// Skip stages that are not enabled
if (!maxwell3d.regs.IsShaderConfigEnabled(index)) {
switch (program) {
case Maxwell::ShaderProgram::Geometry:
program_manager.UseGeometryShader(0);
break;
case Maxwell::ShaderProgram::Fragment:
program_manager.UseFragmentShader(0);
break;
default:
break;
}
continue;
}
// Currently this stages are not supported in the OpenGL backend.
// TODO(Blinkhawk): Port tesselation shaders from Vulkan to OpenGL
if (program == Maxwell::ShaderProgram::TesselationControl ||
program == Maxwell::ShaderProgram::TesselationEval) {
continue;
}
Shader* const shader = shader_cache.GetStageProgram(program, async_shaders);
const GLuint program_handle = shader->IsBuilt() ? shader->GetHandle() : 0;
switch (program) {
case Maxwell::ShaderProgram::VertexA:
case Maxwell::ShaderProgram::VertexB:
program_manager.UseVertexShader(program_handle);
break;
case Maxwell::ShaderProgram::Geometry:
program_manager.UseGeometryShader(program_handle);
break;
case Maxwell::ShaderProgram::Fragment:
program_manager.UseFragmentShader(program_handle);
break;
default:
UNIMPLEMENTED_MSG("Unimplemented shader index={}, enable={}, offset=0x{:08X}", index,
shader_config.enable.Value(), shader_config.offset);
break;
}
// Stage indices are 0 - 5
const size_t stage = index == 0 ? 0 : index - 1;
shaders[stage] = shader;
SetupDrawTextures(shader, stage);
SetupDrawImages(shader, stage);
buffer_cache.SetEnabledUniformBuffers(stage, shader->GetEntries().enabled_uniform_buffers);
buffer_cache.UnbindGraphicsStorageBuffers(stage);
u32 ssbo_index = 0;
for (const auto& buffer : shader->GetEntries().global_memory_entries) {
buffer_cache.BindGraphicsStorageBuffer(stage, ssbo_index, buffer.cbuf_index,
buffer.cbuf_offset, buffer.is_written);
++ssbo_index;
}
// Workaround for Intel drivers.
// When a clip distance is enabled but not set in the shader it crops parts of the screen
// (sometimes it's half the screen, sometimes three quarters). To avoid this, enable the
// clip distances only when it's written by a shader stage.
clip_distances |= shader->GetEntries().clip_distances;
// When VertexA is enabled, we have dual vertex shaders
if (program == Maxwell::ShaderProgram::VertexA) {
// VertexB was combined with VertexA, so we skip the VertexB iteration
++index;
}
}
SyncClipEnabled(clip_distances);
maxwell3d.dirty.flags[Dirty::Shaders] = false;
buffer_cache.UpdateGraphicsBuffers(is_indexed);
const std::span indices_span(image_view_indices.data(), image_view_indices.size());
texture_cache.FillGraphicsImageViews(indices_span, image_view_ids);
buffer_cache.BindHostGeometryBuffers(is_indexed);
size_t image_view_index = 0;
size_t texture_index = 0;
size_t image_index = 0;
for (size_t stage = 0; stage < Maxwell::MaxShaderStage; ++stage) {
const Shader* const shader = shaders[stage];
if (!shader) {
continue;
}
buffer_cache.BindHostStageBuffers(stage);
const auto& base = device.GetBaseBindings(stage);
BindTextures(shader->GetEntries(), base.sampler, base.image, image_view_index,
texture_index, image_index);
}
}
void RasterizerOpenGL::LoadDiskResources(u64 title_id, const std::atomic_bool& stop_loading,
const VideoCore::DiskResourceLoadCallback& callback) {
shader_cache.LoadDiskCache(title_id, stop_loading, callback);
}
void RasterizerOpenGL::Clear() {
MICROPROFILE_SCOPE(OpenGL_Clears);
if (!maxwell3d.ShouldExecute()) {
return;
}
const auto& regs = maxwell3d.regs;
bool use_color{};
bool use_depth{};
bool use_stencil{};
if (regs.clear_buffers.R || regs.clear_buffers.G || regs.clear_buffers.B ||
regs.clear_buffers.A) {
use_color = true;
const GLuint index = regs.clear_buffers.RT;
state_tracker.NotifyColorMask(index);
glColorMaski(index, regs.clear_buffers.R != 0, regs.clear_buffers.G != 0,
regs.clear_buffers.B != 0, regs.clear_buffers.A != 0);
// TODO(Rodrigo): Determine if clamping is used on clears
SyncFragmentColorClampState();
SyncFramebufferSRGB();
}
if (regs.clear_buffers.Z) {
ASSERT_MSG(regs.zeta_enable != 0, "Tried to clear Z but buffer is not enabled!");
use_depth = true;
state_tracker.NotifyDepthMask();
glDepthMask(GL_TRUE);
}
if (regs.clear_buffers.S) {
ASSERT_MSG(regs.zeta_enable, "Tried to clear stencil but buffer is not enabled!");
use_stencil = true;
}
if (!use_color && !use_depth && !use_stencil) {
// No color surface nor depth/stencil surface are enabled
return;
}
SyncRasterizeEnable();
SyncStencilTestState();
if (regs.clear_flags.scissor) {
SyncScissorTest();
} else {
state_tracker.NotifyScissor0();
glDisablei(GL_SCISSOR_TEST, 0);
}
UNIMPLEMENTED_IF(regs.clear_flags.viewport);
std::scoped_lock lock{texture_cache.mutex};
texture_cache.UpdateRenderTargets(true);
state_tracker.BindFramebuffer(texture_cache.GetFramebuffer()->Handle());
if (use_color) {
glClearBufferfv(GL_COLOR, regs.clear_buffers.RT, regs.clear_color);
}
if (use_depth && use_stencil) {
glClearBufferfi(GL_DEPTH_STENCIL, 0, regs.clear_depth, regs.clear_stencil);
} else if (use_depth) {
glClearBufferfv(GL_DEPTH, 0, ®s.clear_depth);
} else if (use_stencil) {
glClearBufferiv(GL_STENCIL, 0, ®s.clear_stencil);
}
++num_queued_commands;
}
void RasterizerOpenGL::Draw(bool is_indexed, bool is_instanced) {
MICROPROFILE_SCOPE(OpenGL_Drawing);
query_cache.UpdateCounters();
SyncState();
// Setup shaders and their used resources.
std::scoped_lock lock{buffer_cache.mutex, texture_cache.mutex};
SetupShaders(is_indexed);
texture_cache.UpdateRenderTargets(false);
state_tracker.BindFramebuffer(texture_cache.GetFramebuffer()->Handle());
program_manager.BindGraphicsPipeline();
const GLenum primitive_mode = MaxwellToGL::PrimitiveTopology(maxwell3d.regs.draw.topology);
BeginTransformFeedback(primitive_mode);
const GLuint base_instance = static_cast<GLuint>(maxwell3d.regs.vb_base_instance);
const GLsizei num_instances =
static_cast<GLsizei>(is_instanced ? maxwell3d.mme_draw.instance_count : 1);
if (is_indexed) {
const GLint base_vertex = static_cast<GLint>(maxwell3d.regs.vb_element_base);
const GLsizei num_vertices = static_cast<GLsizei>(maxwell3d.regs.index_array.count);
const GLvoid* const offset = buffer_cache_runtime.IndexOffset();
const GLenum format = MaxwellToGL::IndexFormat(maxwell3d.regs.index_array.format);
if (num_instances == 1 && base_instance == 0 && base_vertex == 0) {
glDrawElements(primitive_mode, num_vertices, format, offset);
} else if (num_instances == 1 && base_instance == 0) {
glDrawElementsBaseVertex(primitive_mode, num_vertices, format, offset, base_vertex);
} else if (base_vertex == 0 && base_instance == 0) {
glDrawElementsInstanced(primitive_mode, num_vertices, format, offset, num_instances);
} else if (base_vertex == 0) {
glDrawElementsInstancedBaseInstance(primitive_mode, num_vertices, format, offset,
num_instances, base_instance);
} else if (base_instance == 0) {
glDrawElementsInstancedBaseVertex(primitive_mode, num_vertices, format, offset,
num_instances, base_vertex);
} else {
glDrawElementsInstancedBaseVertexBaseInstance(primitive_mode, num_vertices, format,
offset, num_instances, base_vertex,
base_instance);
}
} else {
const GLint base_vertex = static_cast<GLint>(maxwell3d.regs.vertex_buffer.first);
const GLsizei num_vertices = static_cast<GLsizei>(maxwell3d.regs.vertex_buffer.count);
if (num_instances == 1 && base_instance == 0) {
glDrawArrays(primitive_mode, base_vertex, num_vertices);
} else if (base_instance == 0) {
glDrawArraysInstanced(primitive_mode, base_vertex, num_vertices, num_instances);
} else {
glDrawArraysInstancedBaseInstance(primitive_mode, base_vertex, num_vertices,
num_instances, base_instance);
}
}
EndTransformFeedback();
++num_queued_commands;
gpu.TickWork();
}
void RasterizerOpenGL::DispatchCompute(GPUVAddr code_addr) {
Shader* const kernel = shader_cache.GetComputeKernel(code_addr);
std::scoped_lock lock{buffer_cache.mutex, texture_cache.mutex};
BindComputeTextures(kernel);
const auto& entries = kernel->GetEntries();
buffer_cache.SetEnabledComputeUniformBuffers(entries.enabled_uniform_buffers);
buffer_cache.UnbindComputeStorageBuffers();
u32 ssbo_index = 0;
for (const auto& buffer : entries.global_memory_entries) {
buffer_cache.BindComputeStorageBuffer(ssbo_index, buffer.cbuf_index, buffer.cbuf_offset,
buffer.is_written);
++ssbo_index;
}
buffer_cache.UpdateComputeBuffers();
buffer_cache.BindHostComputeBuffers();
const auto& launch_desc = kepler_compute.launch_description;
glDispatchCompute(launch_desc.grid_dim_x, launch_desc.grid_dim_y, launch_desc.grid_dim_z);
++num_queued_commands;
}
void RasterizerOpenGL::ResetCounter(VideoCore::QueryType type) {
query_cache.ResetCounter(type);
}
void RasterizerOpenGL::Query(GPUVAddr gpu_addr, VideoCore::QueryType type,
std::optional<u64> timestamp) {
query_cache.Query(gpu_addr, type, timestamp);
}
void RasterizerOpenGL::BindGraphicsUniformBuffer(size_t stage, u32 index, GPUVAddr gpu_addr,
u32 size) {
std::scoped_lock lock{buffer_cache.mutex};
buffer_cache.BindGraphicsUniformBuffer(stage, index, gpu_addr, size);
}
void RasterizerOpenGL::FlushAll() {}
void RasterizerOpenGL::FlushRegion(VAddr addr, u64 size) {
MICROPROFILE_SCOPE(OpenGL_CacheManagement);
if (addr == 0 || size == 0) {
return;
}
{
std::scoped_lock lock{texture_cache.mutex};
texture_cache.DownloadMemory(addr, size);
}
{
std::scoped_lock lock{buffer_cache.mutex};
buffer_cache.DownloadMemory(addr, size);
}
query_cache.FlushRegion(addr, size);
}
bool RasterizerOpenGL::MustFlushRegion(VAddr addr, u64 size) {
std::scoped_lock lock{buffer_cache.mutex, texture_cache.mutex};
if (!Settings::IsGPULevelHigh()) {
return buffer_cache.IsRegionGpuModified(addr, size);
}
return texture_cache.IsRegionGpuModified(addr, size) ||
buffer_cache.IsRegionGpuModified(addr, size);
}
void RasterizerOpenGL::InvalidateRegion(VAddr addr, u64 size) {
MICROPROFILE_SCOPE(OpenGL_CacheManagement);
if (addr == 0 || size == 0) {
return;
}
{
std::scoped_lock lock{texture_cache.mutex};
texture_cache.WriteMemory(addr, size);
}
{
std::scoped_lock lock{buffer_cache.mutex};
buffer_cache.WriteMemory(addr, size);
}
shader_cache.InvalidateRegion(addr, size);
query_cache.InvalidateRegion(addr, size);
}
void RasterizerOpenGL::OnCPUWrite(VAddr addr, u64 size) {
MICROPROFILE_SCOPE(OpenGL_CacheManagement);
if (addr == 0 || size == 0) {
return;
}
shader_cache.OnCPUWrite(addr, size);
{
std::scoped_lock lock{texture_cache.mutex};
texture_cache.WriteMemory(addr, size);
}
{
std::scoped_lock lock{buffer_cache.mutex};
buffer_cache.CachedWriteMemory(addr, size);
}
}
void RasterizerOpenGL::SyncGuestHost() {
MICROPROFILE_SCOPE(OpenGL_CacheManagement);
shader_cache.SyncGuestHost();
{
std::scoped_lock lock{buffer_cache.mutex};
buffer_cache.FlushCachedWrites();
}
}
void RasterizerOpenGL::UnmapMemory(VAddr addr, u64 size) {
{
std::scoped_lock lock{texture_cache.mutex};
texture_cache.UnmapMemory(addr, size);
}
{
std::scoped_lock lock{buffer_cache.mutex};
buffer_cache.WriteMemory(addr, size);
}
shader_cache.OnCPUWrite(addr, size);
}
void RasterizerOpenGL::SignalSemaphore(GPUVAddr addr, u32 value) {
if (!gpu.IsAsync()) {
gpu_memory.Write<u32>(addr, value);
return;
}
fence_manager.SignalSemaphore(addr, value);
}
void RasterizerOpenGL::SignalSyncPoint(u32 value) {
if (!gpu.IsAsync()) {
gpu.IncrementSyncPoint(value);
return;
}
fence_manager.SignalSyncPoint(value);
}
void RasterizerOpenGL::ReleaseFences() {
if (!gpu.IsAsync()) {
return;
}
fence_manager.WaitPendingFences();
}
void RasterizerOpenGL::FlushAndInvalidateRegion(VAddr addr, u64 size) {
if (Settings::IsGPULevelExtreme()) {
FlushRegion(addr, size);
}
InvalidateRegion(addr, size);
}
void RasterizerOpenGL::WaitForIdle() {
glMemoryBarrier(GL_ALL_BARRIER_BITS);
}
void RasterizerOpenGL::FragmentBarrier() {
glMemoryBarrier(GL_FRAMEBUFFER_BARRIER_BIT);
}
void RasterizerOpenGL::TiledCacheBarrier() {
glTextureBarrier();
}
void RasterizerOpenGL::FlushCommands() {
// Only flush when we have commands queued to OpenGL.
if (num_queued_commands == 0) {
return;
}
num_queued_commands = 0;
glFlush();
}
void RasterizerOpenGL::TickFrame() {
// Ticking a frame means that buffers will be swapped, calling glFlush implicitly.
num_queued_commands = 0;
fence_manager.TickFrame();
{
std::scoped_lock lock{texture_cache.mutex};
texture_cache.TickFrame();
}
{
std::scoped_lock lock{buffer_cache.mutex};
buffer_cache.TickFrame();
}
}
bool RasterizerOpenGL::AccelerateSurfaceCopy(const Tegra::Engines::Fermi2D::Surface& src,
const Tegra::Engines::Fermi2D::Surface& dst,
const Tegra::Engines::Fermi2D::Config& copy_config) {
MICROPROFILE_SCOPE(OpenGL_Blits);
std::scoped_lock lock{texture_cache.mutex};
texture_cache.BlitImage(dst, src, copy_config);
return true;
}
bool RasterizerOpenGL::AccelerateDisplay(const Tegra::FramebufferConfig& config,
VAddr framebuffer_addr, u32 pixel_stride) {
if (framebuffer_addr == 0) {
return false;
}
MICROPROFILE_SCOPE(OpenGL_CacheManagement);
std::scoped_lock lock{texture_cache.mutex};
ImageView* const image_view{texture_cache.TryFindFramebufferImageView(framebuffer_addr)};
if (!image_view) {
return false;
}
// Verify that the cached surface is the same size and format as the requested framebuffer
// ASSERT_MSG(image_view->size.width == config.width, "Framebuffer width is different");
// ASSERT_MSG(image_view->size.height == config.height, "Framebuffer height is different");
screen_info.display_texture = image_view->Handle(ImageViewType::e2D);
screen_info.display_srgb = VideoCore::Surface::IsPixelFormatSRGB(image_view->format);
return true;
}
void RasterizerOpenGL::BindComputeTextures(Shader* kernel) {
image_view_indices.clear();
sampler_handles.clear();
texture_cache.SynchronizeComputeDescriptors();
SetupComputeTextures(kernel);
SetupComputeImages(kernel);
const std::span indices_span(image_view_indices.data(), image_view_indices.size());
texture_cache.FillComputeImageViews(indices_span, image_view_ids);
program_manager.BindCompute(kernel->GetHandle());
size_t image_view_index = 0;
size_t texture_index = 0;
size_t image_index = 0;
BindTextures(kernel->GetEntries(), 0, 0, image_view_index, texture_index, image_index);
}
void RasterizerOpenGL::BindTextures(const ShaderEntries& entries, GLuint base_texture,
GLuint base_image, size_t& image_view_index,
size_t& texture_index, size_t& image_index) {
const GLuint* const samplers = sampler_handles.data() + texture_index;
const GLuint* const textures = texture_handles.data() + texture_index;
const GLuint* const images = image_handles.data() + image_index;
const size_t num_samplers = entries.samplers.size();
for (const auto& sampler : entries.samplers) {
for (size_t i = 0; i < sampler.size; ++i) {
const ImageViewId image_view_id = image_view_ids[image_view_index++];
const ImageView& image_view = texture_cache.GetImageView(image_view_id);
const GLuint handle = image_view.Handle(ImageViewTypeFromEntry(sampler));
texture_handles[texture_index++] = handle;
}
}
const size_t num_images = entries.images.size();
for (size_t unit = 0; unit < num_images; ++unit) {
// TODO: Mark as modified
const ImageViewId image_view_id = image_view_ids[image_view_index++];
const ImageView& image_view = texture_cache.GetImageView(image_view_id);
const GLuint handle = image_view.Handle(ImageViewTypeFromEntry(entries.images[unit]));
image_handles[image_index] = handle;
++image_index;
}
if (num_samplers > 0) {
glBindSamplers(base_texture, static_cast<GLsizei>(num_samplers), samplers);
glBindTextures(base_texture, static_cast<GLsizei>(num_samplers), textures);
}
if (num_images > 0) {
glBindImageTextures(base_image, static_cast<GLsizei>(num_images), images);
}
}
void RasterizerOpenGL::SetupDrawTextures(const Shader* shader, size_t stage_index) {
const bool via_header_index =
maxwell3d.regs.sampler_index == Maxwell::SamplerIndex::ViaHeaderIndex;
for (const auto& entry : shader->GetEntries().samplers) {
const auto shader_type = static_cast<ShaderType>(stage_index);
for (size_t index = 0; index < entry.size; ++index) {
const auto handle =
GetTextureInfo(maxwell3d, via_header_index, entry, shader_type, index);
const Sampler* const sampler = texture_cache.GetGraphicsSampler(handle.sampler);
sampler_handles.push_back(sampler->Handle());
image_view_indices.push_back(handle.image);
}
}
}
void RasterizerOpenGL::SetupComputeTextures(const Shader* kernel) {
const bool via_header_index = kepler_compute.launch_description.linked_tsc;
for (const auto& entry : kernel->GetEntries().samplers) {
for (size_t i = 0; i < entry.size; ++i) {
const auto handle =
GetTextureInfo(kepler_compute, via_header_index, entry, ShaderType::Compute, i);
const Sampler* const sampler = texture_cache.GetComputeSampler(handle.sampler);
sampler_handles.push_back(sampler->Handle());
image_view_indices.push_back(handle.image);
}
}
}
void RasterizerOpenGL::SetupDrawImages(const Shader* shader, size_t stage_index) {
const bool via_header_index =
maxwell3d.regs.sampler_index == Maxwell::SamplerIndex::ViaHeaderIndex;
for (const auto& entry : shader->GetEntries().images) {
const auto shader_type = static_cast<ShaderType>(stage_index);
const auto handle = GetTextureInfo(maxwell3d, via_header_index, entry, shader_type);
image_view_indices.push_back(handle.image);
}
}
void RasterizerOpenGL::SetupComputeImages(const Shader* shader) {
const bool via_header_index = kepler_compute.launch_description.linked_tsc;
for (const auto& entry : shader->GetEntries().images) {
const auto handle =
GetTextureInfo(kepler_compute, via_header_index, entry, ShaderType::Compute);
image_view_indices.push_back(handle.image);
}
}
void RasterizerOpenGL::SyncState() {
SyncViewport();
SyncRasterizeEnable();
SyncPolygonModes();
SyncColorMask();
SyncFragmentColorClampState();
SyncMultiSampleState();
SyncDepthTestState();
SyncDepthClamp();
SyncStencilTestState();
SyncBlendState();
SyncLogicOpState();
SyncCullMode();
SyncPrimitiveRestart();
SyncScissorTest();
SyncPointState();
SyncLineState();
SyncPolygonOffset();
SyncAlphaTest();
SyncFramebufferSRGB();
SyncVertexFormats();
SyncVertexInstances();
}
void RasterizerOpenGL::SyncViewport() {
auto& flags = maxwell3d.dirty.flags;
const auto& regs = maxwell3d.regs;
const bool dirty_viewport = flags[Dirty::Viewports];
const bool dirty_clip_control = flags[Dirty::ClipControl];
if (dirty_clip_control || flags[Dirty::FrontFace]) {
flags[Dirty::FrontFace] = false;
GLenum mode = MaxwellToGL::FrontFace(regs.front_face);
if (regs.screen_y_control.triangle_rast_flip != 0 &&
regs.viewport_transform[0].scale_y < 0.0f) {
switch (mode) {
case GL_CW:
mode = GL_CCW;
break;
case GL_CCW:
mode = GL_CW;
break;
}
}
glFrontFace(mode);
}
if (dirty_viewport || flags[Dirty::ClipControl]) {
flags[Dirty::ClipControl] = false;
bool flip_y = false;
if (regs.viewport_transform[0].scale_y < 0.0f) {
flip_y = !flip_y;
}
if (regs.screen_y_control.y_negate != 0) {
flip_y = !flip_y;
}
const bool is_zero_to_one = regs.depth_mode == Maxwell::DepthMode::ZeroToOne;
const GLenum origin = flip_y ? GL_UPPER_LEFT : GL_LOWER_LEFT;
const GLenum depth = is_zero_to_one ? GL_ZERO_TO_ONE : GL_NEGATIVE_ONE_TO_ONE;
state_tracker.ClipControl(origin, depth);
state_tracker.SetYNegate(regs.screen_y_control.y_negate != 0);
}
if (dirty_viewport) {
flags[Dirty::Viewports] = false;
const bool force = flags[Dirty::ViewportTransform];
flags[Dirty::ViewportTransform] = false;
for (std::size_t i = 0; i < Maxwell::NumViewports; ++i) {
if (!force && !flags[Dirty::Viewport0 + i]) {
continue;
}
flags[Dirty::Viewport0 + i] = false;
const auto& src = regs.viewport_transform[i];
const Common::Rectangle<f32> rect{src.GetRect()};
glViewportIndexedf(static_cast<GLuint>(i), rect.left, rect.bottom, rect.GetWidth(),
rect.GetHeight());
const GLdouble reduce_z = regs.depth_mode == Maxwell::DepthMode::MinusOneToOne;
const GLdouble near_depth = src.translate_z - src.scale_z * reduce_z;
const GLdouble far_depth = src.translate_z + src.scale_z;
glDepthRangeIndexed(static_cast<GLuint>(i), near_depth, far_depth);
if (!GLAD_GL_NV_viewport_swizzle) {
continue;
}
glViewportSwizzleNV(static_cast<GLuint>(i), MaxwellToGL::ViewportSwizzle(src.swizzle.x),
MaxwellToGL::ViewportSwizzle(src.swizzle.y),
MaxwellToGL::ViewportSwizzle(src.swizzle.z),
MaxwellToGL::ViewportSwizzle(src.swizzle.w));
}
}
}
void RasterizerOpenGL::SyncDepthClamp() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::DepthClampEnabled]) {
return;
}
flags[Dirty::DepthClampEnabled] = false;
oglEnable(GL_DEPTH_CLAMP, maxwell3d.regs.view_volume_clip_control.depth_clamp_disabled == 0);
}
void RasterizerOpenGL::SyncClipEnabled(u32 clip_mask) {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::ClipDistances] && !flags[Dirty::Shaders]) {
return;
}
flags[Dirty::ClipDistances] = false;
clip_mask &= maxwell3d.regs.clip_distance_enabled;
if (clip_mask == last_clip_distance_mask) {
return;
}
last_clip_distance_mask = clip_mask;
for (std::size_t i = 0; i < Maxwell::Regs::NumClipDistances; ++i) {
oglEnable(static_cast<GLenum>(GL_CLIP_DISTANCE0 + i), (clip_mask >> i) & 1);
}
}
void RasterizerOpenGL::SyncClipCoef() {
UNIMPLEMENTED();
}
void RasterizerOpenGL::SyncCullMode() {
auto& flags = maxwell3d.dirty.flags;
const auto& regs = maxwell3d.regs;
if (flags[Dirty::CullTest]) {
flags[Dirty::CullTest] = false;
if (regs.cull_test_enabled) {
glEnable(GL_CULL_FACE);
glCullFace(MaxwellToGL::CullFace(regs.cull_face));
} else {
glDisable(GL_CULL_FACE);
}
}
}
void RasterizerOpenGL::SyncPrimitiveRestart() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::PrimitiveRestart]) {
return;
}
flags[Dirty::PrimitiveRestart] = false;
if (maxwell3d.regs.primitive_restart.enabled) {
glEnable(GL_PRIMITIVE_RESTART);
glPrimitiveRestartIndex(maxwell3d.regs.primitive_restart.index);
} else {
glDisable(GL_PRIMITIVE_RESTART);
}
}
void RasterizerOpenGL::SyncDepthTestState() {
auto& flags = maxwell3d.dirty.flags;
const auto& regs = maxwell3d.regs;
if (flags[Dirty::DepthMask]) {
flags[Dirty::DepthMask] = false;
glDepthMask(regs.depth_write_enabled ? GL_TRUE : GL_FALSE);
}
if (flags[Dirty::DepthTest]) {
flags[Dirty::DepthTest] = false;
if (regs.depth_test_enable) {
glEnable(GL_DEPTH_TEST);
glDepthFunc(MaxwellToGL::ComparisonOp(regs.depth_test_func));
} else {
glDisable(GL_DEPTH_TEST);
}
}
}
void RasterizerOpenGL::SyncStencilTestState() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::StencilTest]) {
return;
}
flags[Dirty::StencilTest] = false;
const auto& regs = maxwell3d.regs;
oglEnable(GL_STENCIL_TEST, regs.stencil_enable);
glStencilFuncSeparate(GL_FRONT, MaxwellToGL::ComparisonOp(regs.stencil_front_func_func),
regs.stencil_front_func_ref, regs.stencil_front_func_mask);
glStencilOpSeparate(GL_FRONT, MaxwellToGL::StencilOp(regs.stencil_front_op_fail),
MaxwellToGL::StencilOp(regs.stencil_front_op_zfail),
MaxwellToGL::StencilOp(regs.stencil_front_op_zpass));
glStencilMaskSeparate(GL_FRONT, regs.stencil_front_mask);
if (regs.stencil_two_side_enable) {
glStencilFuncSeparate(GL_BACK, MaxwellToGL::ComparisonOp(regs.stencil_back_func_func),
regs.stencil_back_func_ref, regs.stencil_back_func_mask);
glStencilOpSeparate(GL_BACK, MaxwellToGL::StencilOp(regs.stencil_back_op_fail),
MaxwellToGL::StencilOp(regs.stencil_back_op_zfail),
MaxwellToGL::StencilOp(regs.stencil_back_op_zpass));
glStencilMaskSeparate(GL_BACK, regs.stencil_back_mask);
} else {
glStencilFuncSeparate(GL_BACK, GL_ALWAYS, 0, 0xFFFFFFFF);
glStencilOpSeparate(GL_BACK, GL_KEEP, GL_KEEP, GL_KEEP);
glStencilMaskSeparate(GL_BACK, 0xFFFFFFFF);
}
}
void RasterizerOpenGL::SyncRasterizeEnable() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::RasterizeEnable]) {
return;
}
flags[Dirty::RasterizeEnable] = false;
oglEnable(GL_RASTERIZER_DISCARD, maxwell3d.regs.rasterize_enable == 0);
}
void RasterizerOpenGL::SyncPolygonModes() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::PolygonModes]) {
return;
}
flags[Dirty::PolygonModes] = false;
const auto& regs = maxwell3d.regs;
if (regs.fill_rectangle) {
if (!GLAD_GL_NV_fill_rectangle) {
LOG_ERROR(Render_OpenGL, "GL_NV_fill_rectangle used and not supported");
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
return;
}
flags[Dirty::PolygonModeFront] = true;
flags[Dirty::PolygonModeBack] = true;
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL_RECTANGLE_NV);
return;
}
if (regs.polygon_mode_front == regs.polygon_mode_back) {
flags[Dirty::PolygonModeFront] = false;
flags[Dirty::PolygonModeBack] = false;
glPolygonMode(GL_FRONT_AND_BACK, MaxwellToGL::PolygonMode(regs.polygon_mode_front));
return;
}
if (flags[Dirty::PolygonModeFront]) {
flags[Dirty::PolygonModeFront] = false;
glPolygonMode(GL_FRONT, MaxwellToGL::PolygonMode(regs.polygon_mode_front));
}
if (flags[Dirty::PolygonModeBack]) {
flags[Dirty::PolygonModeBack] = false;
glPolygonMode(GL_BACK, MaxwellToGL::PolygonMode(regs.polygon_mode_back));
}
}
void RasterizerOpenGL::SyncColorMask() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::ColorMasks]) {
return;
}
flags[Dirty::ColorMasks] = false;
const bool force = flags[Dirty::ColorMaskCommon];
flags[Dirty::ColorMaskCommon] = false;
const auto& regs = maxwell3d.regs;
if (regs.color_mask_common) {
if (!force && !flags[Dirty::ColorMask0]) {
return;
}
flags[Dirty::ColorMask0] = false;
auto& mask = regs.color_mask[0];
glColorMask(mask.R != 0, mask.B != 0, mask.G != 0, mask.A != 0);
return;
}
// Path without color_mask_common set
for (std::size_t i = 0; i < Maxwell::NumRenderTargets; ++i) {
if (!force && !flags[Dirty::ColorMask0 + i]) {
continue;
}
flags[Dirty::ColorMask0 + i] = false;
const auto& mask = regs.color_mask[i];
glColorMaski(static_cast<GLuint>(i), mask.R != 0, mask.G != 0, mask.B != 0, mask.A != 0);
}
}
void RasterizerOpenGL::SyncMultiSampleState() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::MultisampleControl]) {
return;
}
flags[Dirty::MultisampleControl] = false;
const auto& regs = maxwell3d.regs;
oglEnable(GL_SAMPLE_ALPHA_TO_COVERAGE, regs.multisample_control.alpha_to_coverage);
oglEnable(GL_SAMPLE_ALPHA_TO_ONE, regs.multisample_control.alpha_to_one);
}
void RasterizerOpenGL::SyncFragmentColorClampState() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::FragmentClampColor]) {
return;
}
flags[Dirty::FragmentClampColor] = false;
glClampColor(GL_CLAMP_FRAGMENT_COLOR, maxwell3d.regs.frag_color_clamp ? GL_TRUE : GL_FALSE);
}
void RasterizerOpenGL::SyncBlendState() {
auto& flags = maxwell3d.dirty.flags;
const auto& regs = maxwell3d.regs;
if (flags[Dirty::BlendColor]) {
flags[Dirty::BlendColor] = false;
glBlendColor(regs.blend_color.r, regs.blend_color.g, regs.blend_color.b,
regs.blend_color.a);
}
// TODO(Rodrigo): Revisit blending, there are several registers we are not reading
if (!flags[Dirty::BlendStates]) {
return;
}
flags[Dirty::BlendStates] = false;
if (!regs.independent_blend_enable) {
if (!regs.blend.enable[0]) {
glDisable(GL_BLEND);
return;
}
glEnable(GL_BLEND);
glBlendFuncSeparate(MaxwellToGL::BlendFunc(regs.blend.factor_source_rgb),
MaxwellToGL::BlendFunc(regs.blend.factor_dest_rgb),
MaxwellToGL::BlendFunc(regs.blend.factor_source_a),
MaxwellToGL::BlendFunc(regs.blend.factor_dest_a));
glBlendEquationSeparate(MaxwellToGL::BlendEquation(regs.blend.equation_rgb),
MaxwellToGL::BlendEquation(regs.blend.equation_a));
return;
}
const bool force = flags[Dirty::BlendIndependentEnabled];
flags[Dirty::BlendIndependentEnabled] = false;
for (std::size_t i = 0; i < Maxwell::NumRenderTargets; ++i) {
if (!force && !flags[Dirty::BlendState0 + i]) {
continue;
}
flags[Dirty::BlendState0 + i] = false;
if (!regs.blend.enable[i]) {
glDisablei(GL_BLEND, static_cast<GLuint>(i));
continue;
}
glEnablei(GL_BLEND, static_cast<GLuint>(i));
const auto& src = regs.independent_blend[i];
glBlendFuncSeparatei(static_cast<GLuint>(i), MaxwellToGL::BlendFunc(src.factor_source_rgb),
MaxwellToGL::BlendFunc(src.factor_dest_rgb),
MaxwellToGL::BlendFunc(src.factor_source_a),
MaxwellToGL::BlendFunc(src.factor_dest_a));
glBlendEquationSeparatei(static_cast<GLuint>(i),
MaxwellToGL::BlendEquation(src.equation_rgb),
MaxwellToGL::BlendEquation(src.equation_a));
}
}
void RasterizerOpenGL::SyncLogicOpState() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::LogicOp]) {
return;
}
flags[Dirty::LogicOp] = false;
const auto& regs = maxwell3d.regs;
if (regs.logic_op.enable) {
glEnable(GL_COLOR_LOGIC_OP);
glLogicOp(MaxwellToGL::LogicOp(regs.logic_op.operation));
} else {
glDisable(GL_COLOR_LOGIC_OP);
}
}
void RasterizerOpenGL::SyncScissorTest() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::Scissors]) {
return;
}
flags[Dirty::Scissors] = false;
const auto& regs = maxwell3d.regs;
for (std::size_t index = 0; index < Maxwell::NumViewports; ++index) {
if (!flags[Dirty::Scissor0 + index]) {
continue;
}
flags[Dirty::Scissor0 + index] = false;
const auto& src = regs.scissor_test[index];
if (src.enable) {
glEnablei(GL_SCISSOR_TEST, static_cast<GLuint>(index));
glScissorIndexed(static_cast<GLuint>(index), src.min_x, src.min_y,
src.max_x - src.min_x, src.max_y - src.min_y);
} else {
glDisablei(GL_SCISSOR_TEST, static_cast<GLuint>(index));
}
}
}
void RasterizerOpenGL::SyncPointState() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::PointSize]) {
return;
}
flags[Dirty::PointSize] = false;
oglEnable(GL_POINT_SPRITE, maxwell3d.regs.point_sprite_enable);
oglEnable(GL_PROGRAM_POINT_SIZE, maxwell3d.regs.vp_point_size.enable);
glPointSize(std::max(1.0f, maxwell3d.regs.point_size));
}
void RasterizerOpenGL::SyncLineState() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::LineWidth]) {
return;
}
flags[Dirty::LineWidth] = false;
const auto& regs = maxwell3d.regs;
oglEnable(GL_LINE_SMOOTH, regs.line_smooth_enable);
glLineWidth(regs.line_smooth_enable ? regs.line_width_smooth : regs.line_width_aliased);
}
void RasterizerOpenGL::SyncPolygonOffset() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::PolygonOffset]) {
return;
}
flags[Dirty::PolygonOffset] = false;
const auto& regs = maxwell3d.regs;
oglEnable(GL_POLYGON_OFFSET_FILL, regs.polygon_offset_fill_enable);
oglEnable(GL_POLYGON_OFFSET_LINE, regs.polygon_offset_line_enable);
oglEnable(GL_POLYGON_OFFSET_POINT, regs.polygon_offset_point_enable);
if (regs.polygon_offset_fill_enable || regs.polygon_offset_line_enable ||
regs.polygon_offset_point_enable) {
// Hardware divides polygon offset units by two
glPolygonOffsetClamp(regs.polygon_offset_factor, regs.polygon_offset_units / 2.0f,
regs.polygon_offset_clamp);
}
}
void RasterizerOpenGL::SyncAlphaTest() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::AlphaTest]) {
return;
}
flags[Dirty::AlphaTest] = false;
const auto& regs = maxwell3d.regs;
if (regs.alpha_test_enabled) {
glEnable(GL_ALPHA_TEST);
glAlphaFunc(MaxwellToGL::ComparisonOp(regs.alpha_test_func), regs.alpha_test_ref);
} else {
glDisable(GL_ALPHA_TEST);
}
}
void RasterizerOpenGL::SyncFramebufferSRGB() {
auto& flags = maxwell3d.dirty.flags;
if (!flags[Dirty::FramebufferSRGB]) {
return;
}
flags[Dirty::FramebufferSRGB] = false;
oglEnable(GL_FRAMEBUFFER_SRGB, maxwell3d.regs.framebuffer_srgb);
}
void RasterizerOpenGL::SyncTransformFeedback() {
// TODO(Rodrigo): Inject SKIP_COMPONENTS*_NV when required. An unimplemented message will signal
// when this is required.
const auto& regs = maxwell3d.regs;
static constexpr std::size_t STRIDE = 3;
std::array<GLint, 128 * STRIDE * Maxwell::NumTransformFeedbackBuffers> attribs;
std::array<GLint, Maxwell::NumTransformFeedbackBuffers> streams;
GLint* cursor = attribs.data();
GLint* current_stream = streams.data();
for (std::size_t feedback = 0; feedback < Maxwell::NumTransformFeedbackBuffers; ++feedback) {
const auto& layout = regs.tfb_layouts[feedback];
UNIMPLEMENTED_IF_MSG(layout.stride != layout.varying_count * 4, "Stride padding");
if (layout.varying_count == 0) {
continue;
}
*current_stream = static_cast<GLint>(feedback);
if (current_stream != streams.data()) {
// When stepping one stream, push the expected token
cursor[0] = GL_NEXT_BUFFER_NV;
cursor[1] = 0;
cursor[2] = 0;
cursor += STRIDE;
}
++current_stream;
const auto& locations = regs.tfb_varying_locs[feedback];
std::optional<u8> current_index;
for (u32 offset = 0; offset < layout.varying_count; ++offset) {
const u8 location = locations[offset];
const u8 index = location / 4;
if (current_index == index) {
// Increase number of components of the previous attachment
++cursor[-2];
continue;
}
current_index = index;
std::tie(cursor[0], cursor[2]) = TransformFeedbackEnum(location);
cursor[1] = 1;
cursor += STRIDE;
}
}
const GLsizei num_attribs = static_cast<GLsizei>((cursor - attribs.data()) / STRIDE);
const GLsizei num_strides = static_cast<GLsizei>(current_stream - streams.data());
glTransformFeedbackStreamAttribsNV(num_attribs, attribs.data(), num_strides, streams.data(),
GL_INTERLEAVED_ATTRIBS);
}
void RasterizerOpenGL::BeginTransformFeedback(GLenum primitive_mode) {
const auto& regs = maxwell3d.regs;
if (regs.tfb_enabled == 0) {
return;
}
if (device.UseAssemblyShaders()) {
SyncTransformFeedback();
}
UNIMPLEMENTED_IF(regs.IsShaderConfigEnabled(Maxwell::ShaderProgram::TesselationControl) ||
regs.IsShaderConfigEnabled(Maxwell::ShaderProgram::TesselationEval) ||
regs.IsShaderConfigEnabled(Maxwell::ShaderProgram::Geometry));
UNIMPLEMENTED_IF(primitive_mode != GL_POINTS);
// We may have to call BeginTransformFeedbackNV here since they seem to call different
// implementations on Nvidia's driver (the pointer is different) but we are using
// ARB_transform_feedback3 features with NV_transform_feedback interactions and the ARB
// extension doesn't define BeginTransformFeedback (without NV) interactions. It just works.
glBeginTransformFeedback(GL_POINTS);
}
void RasterizerOpenGL::EndTransformFeedback() {
const auto& regs = maxwell3d.regs;
if (regs.tfb_enabled == 0) {
return;
}
glEndTransformFeedback();
}
} // namespace OpenGL