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Merge pull request #334 from Subv/used_buffers

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GPU: Use the buffer hints from the shader decompiler to upload only the necessary const buffers for each shader stage
This commit is contained in:
bunnei 2018-04-15 13:17:30 -04:00 committed by GitHub
commit b60834ac41
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 39 additions and 28 deletions
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62
src/video_core/renderer_opengl/gl_rasterizer.cpp
View file

@ -223,15 +223,19 @@ void RasterizerOpenGL::SetupShaders(u8* buffer_ptr, GLintptr buffer_offset, size
Memory::ReadBlock(cpu_address, program_code.data(), program_code.size() * sizeof(u64));
GLShader::ShaderSetup setup{std::move(program_code)};
GLShader::ShaderEntries shader_resources;
switch (program) {
case Maxwell::ShaderProgram::VertexB: {
GLShader::MaxwellVSConfig vs_config{setup};
shader_program_manager->UseProgrammableVertexShader(vs_config, setup);
shader_resources =
shader_program_manager->UseProgrammableVertexShader(vs_config, setup);
break;
}
case Maxwell::ShaderProgram::Fragment: {
GLShader::MaxwellFSConfig fs_config{setup};
shader_program_manager->UseProgrammableFragmentShader(fs_config, setup);
shader_resources =
shader_program_manager->UseProgrammableFragmentShader(fs_config, setup);
break;
}
default:
@ -239,6 +243,10 @@ void RasterizerOpenGL::SetupShaders(u8* buffer_ptr, GLintptr buffer_offset, size
shader_config.enable.Value(), shader_config.offset);
UNREACHABLE();
}
// Configure the const buffers for this shader stage.
SetupConstBuffers(static_cast<Maxwell::ShaderStage>(stage),
shader_resources.const_buffer_entries);
}
shader_program_manager->UseTrivialGeometryShader();
@ -306,8 +314,6 @@ void RasterizerOpenGL::DrawArrays() {
// Sync and bind the texture surfaces
BindTextures();
// Configure the constant buffer objects
SetupConstBuffers();
// Viewport can have negative offsets or larger dimensions than our framebuffer sub-rect. Enable
// scissor test to prevent drawing outside of the framebuffer region
@ -537,36 +543,40 @@ void RasterizerOpenGL::SamplerInfo::SyncWithConfig(const Tegra::Texture::TSCEntr
}
}
void RasterizerOpenGL::SetupConstBuffers() {
using Regs = Tegra::Engines::Maxwell3D::Regs;
void RasterizerOpenGL::SetupConstBuffers(Maxwell::ShaderStage stage,
const std::vector<GLShader::ConstBufferEntry>& entries) {
auto& gpu = Core::System::GetInstance().GPU();
auto& maxwell3d = gpu.Get3DEngine();
ASSERT_MSG(maxwell3d.IsShaderStageEnabled(stage),
"Attempted to upload constbuffer of disabled shader stage");
// Reset all buffer draw state for this stage.
for (auto& buffer : state.draw.const_buffers[static_cast<size_t>(stage)]) {
buffer.bindpoint = 0;
buffer.enabled = false;
}
// Upload only the enabled buffers from the 16 constbuffers of each shader stage
u32 current_bindpoint = 0;
for (u32 stage = 0; stage < Regs::MaxShaderStage; ++stage) {
auto& shader_stage = maxwell3d.state.shader_stages[stage];
bool stage_enabled = maxwell3d.IsShaderStageEnabled(static_cast<Regs::ShaderStage>(stage));
auto& shader_stage = maxwell3d.state.shader_stages[static_cast<size_t>(stage)];
for (u32 buffer_id = 0; buffer_id < Regs::MaxConstBuffers; ++buffer_id) {
const auto& buffer = shader_stage.const_buffers[buffer_id];
for (u32 bindpoint = 0; bindpoint < entries.size(); ++bindpoint) {
const auto& used_buffer = entries[bindpoint];
const auto& buffer = shader_stage.const_buffers[used_buffer.GetIndex()];
auto& buffer_draw_state =
state.draw.const_buffers[static_cast<size_t>(stage)][used_buffer.GetIndex()];
state.draw.const_buffers[stage][buffer_id].enabled = buffer.enabled && stage_enabled;
ASSERT_MSG(buffer.enabled, "Attempted to upload disabled constbuffer");
buffer_draw_state.enabled = true;
buffer_draw_state.bindpoint = bindpoint;
if (buffer.enabled && stage_enabled) {
state.draw.const_buffers[stage][buffer_id].bindpoint = current_bindpoint;
current_bindpoint++;
VAddr addr = gpu.memory_manager->PhysicalToVirtualAddress(buffer.address);
std::vector<u8> data(used_buffer.GetSize() * sizeof(float));
Memory::ReadBlock(addr, data.data(), data.size());
VAddr addr = gpu.memory_manager->PhysicalToVirtualAddress(buffer.address);
const u8* data = Memory::GetPointer(addr);
glBindBuffer(GL_SHADER_STORAGE_BUFFER,
state.draw.const_buffers[stage][buffer_id].ssbo);
glBufferData(GL_SHADER_STORAGE_BUFFER, buffer.size, data, GL_DYNAMIC_DRAW);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
} else {
state.draw.const_buffers[stage][buffer_id].bindpoint = -1;
}
}
glBindBuffer(GL_SHADER_STORAGE_BUFFER, buffer_draw_state.ssbo);
glBufferData(GL_SHADER_STORAGE_BUFFER, data.size(), data.data(), GL_DYNAMIC_DRAW);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
}
state.Apply();

3
src/video_core/renderer_opengl/gl_rasterizer.h
View file

@ -88,7 +88,8 @@ private:
void BindTextures();
/// Configures the current constbuffers to use for the draw command.
void SetupConstBuffers();
void SetupConstBuffers(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage,
const std::vector<GLShader::ConstBufferEntry>& entries);
/// Syncs the viewport to match the guest state
void SyncViewport(const MathUtil::Rectangle<u32>& surfaces_rect, u16 res_scale);

2
src/video_core/renderer_opengl/gl_state.h
View file

@ -124,7 +124,7 @@ public:
GLuint shader_program; // GL_CURRENT_PROGRAM
GLuint program_pipeline; // GL_PROGRAM_PIPELINE_BINDING
struct ConstBufferConfig {
bool enabled;
bool enabled = false;
GLuint bindpoint;
GLuint ssbo;
};