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Merge pull request #1006 from degasus/stream_buffer

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GL renderer: Pick the streambuffer from citra and use them.
This commit is contained in:
bunnei 2018-08-12 13:14:42 -04:00 committed by GitHub
commit b8c1dca62f
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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 189 additions and 316 deletions
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192
src/video_core/renderer_opengl/gl_rasterizer.cpp
View file

@ -36,30 +36,21 @@ MICROPROFILE_DEFINE(OpenGL_Drawing, "OpenGL", "Drawing", MP_RGB(128, 128, 192));
MICROPROFILE_DEFINE(OpenGL_Blits, "OpenGL", "Blits", MP_RGB(100, 100, 255));
MICROPROFILE_DEFINE(OpenGL_CacheManagement, "OpenGL", "Cache Mgmt", MP_RGB(100, 255, 100));
RasterizerOpenGL::RasterizerOpenGL(Core::Frontend::EmuWindow& window) : emu_window{window} {
RasterizerOpenGL::RasterizerOpenGL(Core::Frontend::EmuWindow& window)
: emu_window{window}, stream_buffer(GL_ARRAY_BUFFER, STREAM_BUFFER_SIZE) {
// Create sampler objects
for (size_t i = 0; i < texture_samplers.size(); ++i) {
texture_samplers[i].Create();
state.texture_units[i].sampler = texture_samplers[i].sampler.handle;
}
// Create SSBOs
for (size_t stage = 0; stage < ssbos.size(); ++stage) {
for (size_t buffer = 0; buffer < ssbos[stage].size(); ++buffer) {
ssbos[stage][buffer].Create();
state.draw.const_buffers[stage][buffer].ssbo = ssbos[stage][buffer].handle;
}
}
GLint ext_num;
glGetIntegerv(GL_NUM_EXTENSIONS, &ext_num);
for (GLint i = 0; i < ext_num; i++) {
const std::string_view extension{
reinterpret_cast<const char*>(glGetStringi(GL_EXTENSIONS, i))};
if (extension == "GL_ARB_buffer_storage") {
has_ARB_buffer_storage = true;
} else if (extension == "GL_ARB_direct_state_access") {
if (extension == "GL_ARB_direct_state_access") {
has_ARB_direct_state_access = true;
} else if (extension == "GL_ARB_separate_shader_objects") {
has_ARB_separate_shader_objects = true;
@ -86,47 +77,31 @@ RasterizerOpenGL::RasterizerOpenGL(Core::Frontend::EmuWindow& window) : emu_wind
hw_vao.Create();
stream_buffer = OGLStreamBuffer::MakeBuffer(has_ARB_buffer_storage, GL_ARRAY_BUFFER);
stream_buffer->Create(STREAM_BUFFER_SIZE, STREAM_BUFFER_SIZE / 2);
state.draw.vertex_buffer = stream_buffer->GetHandle();
state.draw.vertex_buffer = stream_buffer.GetHandle();
shader_program_manager = std::make_unique<GLShader::ProgramManager>();
state.draw.shader_program = 0;
state.draw.vertex_array = hw_vao.handle;
state.Apply();
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, stream_buffer->GetHandle());
for (unsigned index = 0; index < uniform_buffers.size(); ++index) {
auto& buffer = uniform_buffers[index];
buffer.Create();
glBindBuffer(GL_UNIFORM_BUFFER, buffer.handle);
glBufferData(GL_UNIFORM_BUFFER, sizeof(GLShader::MaxwellUniformData), nullptr,
GL_STREAM_COPY);
glBindBufferBase(GL_UNIFORM_BUFFER, index, buffer.handle);
}
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, stream_buffer.GetHandle());
glEnable(GL_BLEND);
glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, &uniform_buffer_alignment);
LOG_CRITICAL(Render_OpenGL, "Sync fixed function OpenGL state here!");
}
RasterizerOpenGL::~RasterizerOpenGL() {
if (stream_buffer != nullptr) {
state.draw.vertex_buffer = stream_buffer->GetHandle();
state.Apply();
stream_buffer->Release();
}
}
RasterizerOpenGL::~RasterizerOpenGL() {}
std::pair<u8*, GLintptr> RasterizerOpenGL::SetupVertexArrays(u8* array_ptr,
GLintptr buffer_offset) {
MICROPROFILE_SCOPE(OpenGL_VAO);
const auto& regs = Core::System::GetInstance().GPU().Maxwell3D().regs;
const auto& memory_manager = Core::System::GetInstance().GPU().memory_manager;
state.draw.vertex_array = hw_vao.handle;
state.draw.vertex_buffer = stream_buffer->GetHandle();
state.draw.vertex_buffer = stream_buffer.GetHandle();
state.Apply();
// Upload all guest vertex arrays sequentially to our buffer
@ -141,16 +116,15 @@ std::pair<u8*, GLintptr> RasterizerOpenGL::SetupVertexArrays(u8* array_ptr,
ASSERT(end > start);
u64 size = end - start + 1;
// Copy vertex array data
Memory::ReadBlock(*memory_manager->GpuToCpuAddress(start), array_ptr, size);
GLintptr vertex_buffer_offset;
std::tie(array_ptr, buffer_offset, vertex_buffer_offset) =
UploadMemory(array_ptr, buffer_offset, start, size);
// Bind the vertex array to the buffer at the current offset.
glBindVertexBuffer(index, stream_buffer->GetHandle(), buffer_offset, vertex_array.stride);
glBindVertexBuffer(index, stream_buffer.GetHandle(), vertex_buffer_offset,
vertex_array.stride);
ASSERT_MSG(vertex_array.divisor == 0, "Vertex buffer divisor unimplemented");
array_ptr += size;
buffer_offset += size;
}
// Use the vertex array as-is, assumes that the data is formatted correctly for OpenGL.
@ -201,22 +175,12 @@ static GLShader::ProgramCode GetShaderProgramCode(Maxwell::ShaderProgram program
return program_code;
}
void RasterizerOpenGL::SetupShaders(u8* buffer_ptr, GLintptr buffer_offset) {
// Helper function for uploading uniform data
const auto copy_buffer = [&](GLuint handle, GLintptr offset, GLsizeiptr size) {
if (has_ARB_direct_state_access) {
glCopyNamedBufferSubData(stream_buffer->GetHandle(), handle, offset, 0, size);
} else {
glBindBuffer(GL_COPY_WRITE_BUFFER, handle);
glCopyBufferSubData(GL_ARRAY_BUFFER, GL_COPY_WRITE_BUFFER, offset, 0, size);
}
};
std::pair<u8*, GLintptr> RasterizerOpenGL::SetupShaders(u8* buffer_ptr, GLintptr buffer_offset) {
auto& gpu = Core::System::GetInstance().GPU().Maxwell3D();
// Next available bindpoints to use when uploading the const buffers and textures to the GLSL
// shaders. The constbuffer bindpoint starts after the shader stage configuration bind points.
u32 current_constbuffer_bindpoint = static_cast<u32>(uniform_buffers.size());
u32 current_constbuffer_bindpoint = Tegra::Engines::Maxwell3D::Regs::MaxShaderStage;
u32 current_texture_bindpoint = 0;
for (size_t index = 0; index < Maxwell::MaxShaderProgram; ++index) {
@ -228,22 +192,21 @@ void RasterizerOpenGL::SetupShaders(u8* buffer_ptr, GLintptr buffer_offset) {
continue;
}
std::tie(buffer_ptr, buffer_offset) =
AlignBuffer(buffer_ptr, buffer_offset, static_cast<size_t>(uniform_buffer_alignment));
const size_t stage{index == 0 ? 0 : index - 1}; // Stage indices are 0 - 5
GLShader::MaxwellUniformData ubo{};
ubo.SetFromRegs(gpu.state.shader_stages[stage]);
std::memcpy(buffer_ptr, &ubo, sizeof(ubo));
// Flush the buffer so that the GPU can see the data we just wrote.
glFlushMappedBufferRange(GL_ARRAY_BUFFER, buffer_offset, sizeof(ubo));
// Bind the buffer
glBindBufferRange(GL_UNIFORM_BUFFER, stage, stream_buffer.GetHandle(), buffer_offset,
sizeof(ubo));
// Upload uniform data as one UBO per stage
const GLintptr ubo_offset = buffer_offset;
copy_buffer(uniform_buffers[stage].handle, ubo_offset,
sizeof(GLShader::MaxwellUniformData));
buffer_ptr += sizeof(GLShader::MaxwellUniformData);
buffer_offset += sizeof(GLShader::MaxwellUniformData);
buffer_ptr += sizeof(ubo);
buffer_offset += sizeof(ubo);
GLShader::ShaderSetup setup{GetShaderProgramCode(program)};
GLShader::ShaderEntries shader_resources;
@ -282,9 +245,9 @@ void RasterizerOpenGL::SetupShaders(u8* buffer_ptr, GLintptr buffer_offset) {
static_cast<Maxwell::ShaderStage>(stage));
// Configure the const buffers for this shader stage.
current_constbuffer_bindpoint =
SetupConstBuffers(static_cast<Maxwell::ShaderStage>(stage), gl_stage_program,
current_constbuffer_bindpoint, shader_resources.const_buffer_entries);
std::tie(buffer_ptr, buffer_offset, current_constbuffer_bindpoint) = SetupConstBuffers(
buffer_ptr, buffer_offset, static_cast<Maxwell::ShaderStage>(stage), gl_stage_program,
current_constbuffer_bindpoint, shader_resources.const_buffer_entries);
// Configure the textures for this shader stage.
current_texture_bindpoint =
@ -299,6 +262,8 @@ void RasterizerOpenGL::SetupShaders(u8* buffer_ptr, GLintptr buffer_offset) {
}
shader_program_manager->UseTrivialGeometryShader();
return {buffer_ptr, buffer_offset};
}
size_t RasterizerOpenGL::CalculateVertexArraysSize() const {
@ -432,6 +397,31 @@ void RasterizerOpenGL::Clear() {
}
}
std::pair<u8*, GLintptr> RasterizerOpenGL::AlignBuffer(u8* buffer_ptr, GLintptr buffer_offset,
size_t alignment) {
// Align the offset, not the mapped pointer
GLintptr offset_aligned =
static_cast<GLintptr>(Common::AlignUp(static_cast<size_t>(buffer_offset), alignment));
return {buffer_ptr + (offset_aligned - buffer_offset), offset_aligned};
}
std::tuple<u8*, GLintptr, GLintptr> RasterizerOpenGL::UploadMemory(u8* buffer_ptr,
GLintptr buffer_offset,
Tegra::GPUVAddr gpu_addr,
size_t size, size_t alignment) {
std::tie(buffer_ptr, buffer_offset) = AlignBuffer(buffer_ptr, buffer_offset, alignment);
GLintptr uploaded_offset = buffer_offset;
const auto& memory_manager = Core::System::GetInstance().GPU().memory_manager;
const boost::optional<VAddr> cpu_addr{memory_manager->GpuToCpuAddress(gpu_addr)};
Memory::ReadBlock(*cpu_addr, buffer_ptr, size);
buffer_ptr += size;
buffer_offset += size;
return {buffer_ptr, buffer_offset, uploaded_offset};
}
void RasterizerOpenGL::DrawArrays() {
if (accelerate_draw == AccelDraw::Disabled)
return;
@ -456,7 +446,7 @@ void RasterizerOpenGL::DrawArrays() {
const u64 index_buffer_size{regs.index_array.count * regs.index_array.FormatSizeInBytes()};
const unsigned vertex_num{is_indexed ? regs.index_array.count : regs.vertex_buffer.count};
state.draw.vertex_buffer = stream_buffer->GetHandle();
state.draw.vertex_buffer = stream_buffer.GetHandle();
state.Apply();
size_t buffer_size = CalculateVertexArraysSize();
@ -466,41 +456,31 @@ void RasterizerOpenGL::DrawArrays() {
}
// Uniform space for the 5 shader stages
buffer_size = Common::AlignUp<size_t>(buffer_size, 4) +
sizeof(GLShader::MaxwellUniformData) * Maxwell::MaxShaderStage;
buffer_size =
Common::AlignUp<size_t>(buffer_size, 4) +
(sizeof(GLShader::MaxwellUniformData) + uniform_buffer_alignment) * Maxwell::MaxShaderStage;
// Add space for at least 18 constant buffers
buffer_size += Maxwell::MaxConstBuffers * (MaxConstbufferSize + uniform_buffer_alignment);
u8* buffer_ptr;
GLintptr buffer_offset;
std::tie(buffer_ptr, buffer_offset) =
stream_buffer->Map(static_cast<GLsizeiptr>(buffer_size), 4);
std::tie(buffer_ptr, buffer_offset, std::ignore) =
stream_buffer.Map(static_cast<GLsizeiptr>(buffer_size), 4);
u8* buffer_ptr_base = buffer_ptr;
u8* offseted_buffer;
std::tie(offseted_buffer, buffer_offset) = SetupVertexArrays(buffer_ptr, buffer_offset);
offseted_buffer =
reinterpret_cast<u8*>(Common::AlignUp(reinterpret_cast<size_t>(offseted_buffer), 4));
buffer_offset = Common::AlignUp<size_t>(buffer_offset, 4);
std::tie(buffer_ptr, buffer_offset) = SetupVertexArrays(buffer_ptr, buffer_offset);
// If indexed mode, copy the index buffer
GLintptr index_buffer_offset = 0;
if (is_indexed) {
const auto& memory_manager = Core::System::GetInstance().GPU().memory_manager;
const boost::optional<VAddr> index_data_addr{
memory_manager->GpuToCpuAddress(regs.index_array.StartAddress())};
Memory::ReadBlock(*index_data_addr, offseted_buffer, index_buffer_size);
index_buffer_offset = buffer_offset;
offseted_buffer += index_buffer_size;
buffer_offset += index_buffer_size;
std::tie(buffer_ptr, buffer_offset, index_buffer_offset) = UploadMemory(
buffer_ptr, buffer_offset, regs.index_array.StartAddress(), index_buffer_size);
}
offseted_buffer =
reinterpret_cast<u8*>(Common::AlignUp(reinterpret_cast<size_t>(offseted_buffer), 4));
buffer_offset = Common::AlignUp<size_t>(buffer_offset, 4);
std::tie(buffer_ptr, buffer_offset) = SetupShaders(buffer_ptr, buffer_offset);
SetupShaders(offseted_buffer, buffer_offset);
stream_buffer->Unmap();
stream_buffer.Unmap(buffer_ptr - buffer_ptr_base);
shader_program_manager->ApplyTo(state);
state.Apply();
@ -647,36 +627,23 @@ void RasterizerOpenGL::SamplerInfo::SyncWithConfig(const Tegra::Texture::TSCEntr
}
}
u32 RasterizerOpenGL::SetupConstBuffers(Maxwell::ShaderStage stage, GLuint program,
u32 current_bindpoint,
const std::vector<GLShader::ConstBufferEntry>& entries) {
std::tuple<u8*, GLintptr, u32> RasterizerOpenGL::SetupConstBuffers(
u8* buffer_ptr, GLintptr buffer_offset, Maxwell::ShaderStage stage, GLuint program,
u32 current_bindpoint, const std::vector<GLShader::ConstBufferEntry>& entries) {
const auto& gpu = Core::System::GetInstance().GPU();
const auto& maxwell3d = gpu.Maxwell3D();
// 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
const auto& shader_stage = maxwell3d.state.shader_stages[static_cast<size_t>(stage)];
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()];
if (!buffer.enabled) {
continue;
}
buffer_draw_state.enabled = true;
buffer_draw_state.bindpoint = current_bindpoint + bindpoint;
boost::optional<VAddr> addr = gpu.memory_manager->GpuToCpuAddress(buffer.address);
size_t size = 0;
if (used_buffer.IsIndirect()) {
@ -698,25 +665,26 @@ u32 RasterizerOpenGL::SetupConstBuffers(Maxwell::ShaderStage stage, GLuint progr
size = Common::AlignUp(size, sizeof(GLvec4));
ASSERT_MSG(size <= MaxConstbufferSize, "Constbuffer too big");
std::vector<u8> data(size);
Memory::ReadBlock(*addr, data.data(), data.size());
GLintptr const_buffer_offset;
std::tie(buffer_ptr, buffer_offset, const_buffer_offset) =
UploadMemory(buffer_ptr, buffer_offset, buffer.address, size,
static_cast<size_t>(uniform_buffer_alignment));
glBindBuffer(GL_UNIFORM_BUFFER, buffer_draw_state.ssbo);
glBufferData(GL_UNIFORM_BUFFER, data.size(), data.data(), GL_DYNAMIC_DRAW);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
glBindBufferRange(GL_UNIFORM_BUFFER, current_bindpoint + bindpoint,
stream_buffer.GetHandle(), const_buffer_offset, size);
// Now configure the bindpoint of the buffer inside the shader
const std::string buffer_name = used_buffer.GetName();
const GLuint index =
glGetProgramResourceIndex(program, GL_UNIFORM_BLOCK, buffer_name.c_str());
if (index != GL_INVALID_INDEX) {
glUniformBlockBinding(program, index, buffer_draw_state.bindpoint);
glUniformBlockBinding(program, index, current_bindpoint + bindpoint);
}
}
state.Apply();
return current_bindpoint + static_cast<u32>(entries.size());
return {buffer_ptr, buffer_offset, current_bindpoint + static_cast<u32>(entries.size())};
}
u32 RasterizerOpenGL::SetupTextures(Maxwell::ShaderStage stage, GLuint program, u32 current_unit,

23
src/video_core/renderer_opengl/gl_rasterizer.h
View file

@ -7,6 +7,7 @@
#include <array>
#include <cstddef>
#include <memory>
#include <tuple>
#include <utility>
#include <vector>
#include <glad/glad.h>
@ -100,9 +101,10 @@ private:
* @param entries Vector describing the buffers that are actually used in the guest shader.
* @returns The next available bindpoint for use in the next shader stage.
*/
u32 SetupConstBuffers(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage, GLuint program,
u32 current_bindpoint,
const std::vector<GLShader::ConstBufferEntry>& entries);
std::tuple<u8*, GLintptr, u32> SetupConstBuffers(
u8* buffer_ptr, GLintptr buffer_offset, Tegra::Engines::Maxwell3D::Regs::ShaderStage stage,
GLuint program, u32 current_bindpoint,
const std::vector<GLShader::ConstBufferEntry>& entries);
/*
* Configures the current textures to use for the draw command.
@ -139,7 +141,6 @@ private:
/// Syncs the blend state to match the guest state
void SyncBlendState();
bool has_ARB_buffer_storage = false;
bool has_ARB_direct_state_access = false;
bool has_ARB_separate_shader_objects = false;
bool has_ARB_vertex_attrib_binding = false;
@ -155,22 +156,24 @@ private:
OGLVertexArray hw_vao;
std::array<SamplerInfo, GLShader::NumTextureSamplers> texture_samplers;
std::array<std::array<OGLBuffer, Tegra::Engines::Maxwell3D::Regs::MaxConstBuffers>,
Tegra::Engines::Maxwell3D::Regs::MaxShaderStage>
ssbos;
static constexpr size_t STREAM_BUFFER_SIZE = 128 * 1024 * 1024;
std::unique_ptr<OGLStreamBuffer> stream_buffer;
OGLStreamBuffer stream_buffer;
OGLBuffer uniform_buffer;
OGLFramebuffer framebuffer;
GLint uniform_buffer_alignment;
size_t CalculateVertexArraysSize() const;
std::pair<u8*, GLintptr> SetupVertexArrays(u8* array_ptr, GLintptr buffer_offset);
std::array<OGLBuffer, Tegra::Engines::Maxwell3D::Regs::MaxShaderStage> uniform_buffers;
std::pair<u8*, GLintptr> SetupShaders(u8* buffer_ptr, GLintptr buffer_offset);
void SetupShaders(u8* buffer_ptr, GLintptr buffer_offset);
std::pair<u8*, GLintptr> AlignBuffer(u8* buffer_ptr, GLintptr buffer_offset, size_t alignment);
std::tuple<u8*, GLintptr, GLintptr> UploadMemory(u8* buffer_ptr, GLintptr buffer_offset,
Tegra::GPUVAddr gpu_addr, size_t size,
size_t alignment = 4);
enum class AccelDraw { Disabled, Arrays, Indexed };
AccelDraw accelerate_draw = AccelDraw::Disabled;

15
src/video_core/renderer_opengl/gl_state.cpp
View file

@ -203,21 +203,6 @@ void OpenGLState::Apply() const {
}
}
// Constbuffers
for (std::size_t stage = 0; stage < draw.const_buffers.size(); ++stage) {
for (std::size_t buffer_id = 0; buffer_id < draw.const_buffers[stage].size(); ++buffer_id) {
const auto& current = cur_state.draw.const_buffers[stage][buffer_id];
const auto& new_state = draw.const_buffers[stage][buffer_id];
if (current.enabled != new_state.enabled || current.bindpoint != new_state.bindpoint ||
current.ssbo != new_state.ssbo) {
if (new_state.enabled) {
glBindBufferBase(GL_UNIFORM_BUFFER, new_state.bindpoint, new_state.ssbo);
}
}
}
}
// Framebuffer
if (draw.read_framebuffer != cur_state.draw.read_framebuffer) {
glBindFramebuffer(GL_READ_FRAMEBUFFER, draw.read_framebuffer);

6
src/video_core/renderer_opengl/gl_state.h
View file

@ -119,12 +119,6 @@ public:
GLuint uniform_buffer; // GL_UNIFORM_BUFFER_BINDING
GLuint shader_program; // GL_CURRENT_PROGRAM
GLuint program_pipeline; // GL_PROGRAM_PIPELINE_BINDING
struct ConstBufferConfig {
bool enabled = false;
GLuint bindpoint;
GLuint ssbo;
};
std::array<std::array<ConstBufferConfig, Regs::MaxConstBuffers>, 5> const_buffers;
} draw;
struct {

227
src/video_core/renderer_opengl/gl_stream_buffer.cpp
View file

@ -9,174 +9,91 @@
#include "video_core/renderer_opengl/gl_state.h"
#include "video_core/renderer_opengl/gl_stream_buffer.h"
class OrphanBuffer : public OGLStreamBuffer {
public:
explicit OrphanBuffer(GLenum target) : OGLStreamBuffer(target) {}
~OrphanBuffer() override;
OGLStreamBuffer::OGLStreamBuffer(GLenum target, GLsizeiptr size, bool prefer_coherent)
: gl_target(target), buffer_size(size) {
gl_buffer.Create();
glBindBuffer(gl_target, gl_buffer.handle);
private:
void Create(size_t size, size_t sync_subdivide) override;
void Release() override;
GLsizeiptr allocate_size = size;
if (target == GL_ARRAY_BUFFER) {
// On AMD GPU there is a strange crash in indexed drawing. The crash happens when the buffer
// read position is near the end and is an out-of-bound access to the vertex buffer. This is
// probably a bug in the driver and is related to the usage of vec3<byte> attributes in the
// vertex array. Doubling the allocation size for the vertex buffer seems to avoid the
// crash.
allocate_size *= 2;
}
std::pair<u8*, GLintptr> Map(size_t size, size_t alignment) override;
void Unmap() override;
if (GLAD_GL_ARB_buffer_storage) {
persistent = true;
coherent = prefer_coherent;
GLbitfield flags =
GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | (coherent ? GL_MAP_COHERENT_BIT : 0);
glBufferStorage(gl_target, allocate_size, nullptr, flags);
mapped_ptr = static_cast<u8*>(glMapBufferRange(
gl_target, 0, buffer_size, flags | (coherent ? 0 : GL_MAP_FLUSH_EXPLICIT_BIT)));
} else {
glBufferData(gl_target, allocate_size, nullptr, GL_STREAM_DRAW);
}
}
std::vector<u8> data;
};
class StorageBuffer : public OGLStreamBuffer {
public:
explicit StorageBuffer(GLenum target) : OGLStreamBuffer(target) {}
~StorageBuffer() override;
private:
void Create(size_t size, size_t sync_subdivide) override;
void Release() override;
std::pair<u8*, GLintptr> Map(size_t size, size_t alignment) override;
void Unmap() override;
struct Fence {
OGLSync sync;
size_t offset;
};
std::deque<Fence> head;
std::deque<Fence> tail;
u8* mapped_ptr;
};
OGLStreamBuffer::OGLStreamBuffer(GLenum target) {
gl_target = target;
OGLStreamBuffer::~OGLStreamBuffer() {
if (persistent) {
glBindBuffer(gl_target, gl_buffer.handle);
glUnmapBuffer(gl_target);
}
gl_buffer.Release();
}
GLuint OGLStreamBuffer::GetHandle() const {
return gl_buffer.handle;
}
std::unique_ptr<OGLStreamBuffer> OGLStreamBuffer::MakeBuffer(bool storage_buffer, GLenum target) {
if (storage_buffer) {
return std::make_unique<StorageBuffer>(target);
}
return std::make_unique<OrphanBuffer>(target);
GLsizeiptr OGLStreamBuffer::GetSize() const {
return buffer_size;
}
OrphanBuffer::~OrphanBuffer() {
Release();
}
void OrphanBuffer::Create(size_t size, size_t /*sync_subdivide*/) {
buffer_pos = 0;
buffer_size = size;
data.resize(buffer_size);
if (gl_buffer.handle == 0) {
gl_buffer.Create();
glBindBuffer(gl_target, gl_buffer.handle);
}
glBufferData(gl_target, static_cast<GLsizeiptr>(buffer_size), nullptr, GL_STREAM_DRAW);
}
void OrphanBuffer::Release() {
gl_buffer.Release();
}
std::pair<u8*, GLintptr> OrphanBuffer::Map(size_t size, size_t alignment) {
buffer_pos = Common::AlignUp(buffer_pos, alignment);
if (buffer_pos + size > buffer_size) {
Create(std::max(buffer_size, size), 0);
}
mapped_size = size;
return std::make_pair(&data[buffer_pos], static_cast<GLintptr>(buffer_pos));
}
void OrphanBuffer::Unmap() {
glBufferSubData(gl_target, static_cast<GLintptr>(buffer_pos),
static_cast<GLsizeiptr>(mapped_size), &data[buffer_pos]);
buffer_pos += mapped_size;
}
StorageBuffer::~StorageBuffer() {
Release();
}
void StorageBuffer::Create(size_t size, size_t sync_subdivide) {
if (gl_buffer.handle != 0)
return;
buffer_pos = 0;
buffer_size = size;
buffer_sync_subdivide = std::max<size_t>(sync_subdivide, 1);
gl_buffer.Create();
glBindBuffer(gl_target, gl_buffer.handle);
glBufferStorage(gl_target, static_cast<GLsizeiptr>(buffer_size), nullptr,
GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT);
mapped_ptr = reinterpret_cast<u8*>(
glMapBufferRange(gl_target, 0, static_cast<GLsizeiptr>(buffer_size),
GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_FLUSH_EXPLICIT_BIT));
}
void StorageBuffer::Release() {
if (gl_buffer.handle == 0)
return;
glUnmapBuffer(gl_target);
gl_buffer.Release();
head.clear();
tail.clear();
}
std::pair<u8*, GLintptr> StorageBuffer::Map(size_t size, size_t alignment) {
std::tuple<u8*, GLintptr, bool> OGLStreamBuffer::Map(GLsizeiptr size, GLintptr alignment) {
ASSERT(size <= buffer_size);
OGLSync sync;
buffer_pos = Common::AlignUp(buffer_pos, alignment);
size_t effective_offset = Common::AlignDown(buffer_pos, buffer_sync_subdivide);
if (!head.empty() &&
(effective_offset > head.back().offset || buffer_pos + size > buffer_size)) {
ASSERT(head.back().sync.handle == 0);
head.back().sync.Create();
}
if (buffer_pos + size > buffer_size) {
if (!tail.empty()) {
std::swap(sync, tail.back().sync);
tail.clear();
}
std::swap(tail, head);
buffer_pos = 0;
effective_offset = 0;
}
while (!tail.empty() && buffer_pos + size > tail.front().offset) {
std::swap(sync, tail.front().sync);
tail.pop_front();
}
if (sync.handle != 0) {
glClientWaitSync(sync.handle, GL_SYNC_FLUSH_COMMANDS_BIT, GL_TIMEOUT_IGNORED);
sync.Release();
}
if (head.empty() || effective_offset > head.back().offset) {
head.emplace_back();
head.back().offset = effective_offset;
}
ASSERT(alignment <= buffer_size);
mapped_size = size;
return std::make_pair(&mapped_ptr[buffer_pos], static_cast<GLintptr>(buffer_pos));
if (alignment > 0) {
buffer_pos = Common::AlignUp<size_t>(buffer_pos, alignment);
}
bool invalidate = false;
if (buffer_pos + size > buffer_size) {
buffer_pos = 0;
invalidate = true;
if (persistent) {
glUnmapBuffer(gl_target);
}
}
if (invalidate | !persistent) {
GLbitfield flags = GL_MAP_WRITE_BIT | (persistent ? GL_MAP_PERSISTENT_BIT : 0) |
(coherent ? GL_MAP_COHERENT_BIT : GL_MAP_FLUSH_EXPLICIT_BIT) |
(invalidate ? GL_MAP_INVALIDATE_BUFFER_BIT : GL_MAP_UNSYNCHRONIZED_BIT);
mapped_ptr = static_cast<u8*>(
glMapBufferRange(gl_target, buffer_pos, buffer_size - buffer_pos, flags));
mapped_offset = buffer_pos;
}
return std::make_tuple(mapped_ptr + buffer_pos - mapped_offset, buffer_pos, invalidate);
}
void StorageBuffer::Unmap() {
glFlushMappedBufferRange(gl_target, static_cast<GLintptr>(buffer_pos),
static_cast<GLsizeiptr>(mapped_size));
buffer_pos += mapped_size;
void OGLStreamBuffer::Unmap(GLsizeiptr size) {
ASSERT(size <= mapped_size);
if (!coherent && size > 0) {
glFlushMappedBufferRange(gl_target, buffer_pos - mapped_offset, size);
}
if (!persistent) {
glUnmapBuffer(gl_target);
}
buffer_pos += size;
}

42
src/video_core/renderer_opengl/gl_stream_buffer.h
View file

@ -2,35 +2,41 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <memory>
#include <tuple>
#include <glad/glad.h>
#include "common/common_types.h"
#include "video_core/renderer_opengl/gl_resource_manager.h"
class OGLStreamBuffer : private NonCopyable {
public:
explicit OGLStreamBuffer(GLenum target);
virtual ~OGLStreamBuffer() = default;
public:
static std::unique_ptr<OGLStreamBuffer> MakeBuffer(bool storage_buffer, GLenum target);
virtual void Create(size_t size, size_t sync_subdivide) = 0;
virtual void Release() {}
explicit OGLStreamBuffer(GLenum target, GLsizeiptr size, bool prefer_coherent = false);
~OGLStreamBuffer();
GLuint GetHandle() const;
GLsizeiptr GetSize() const;
virtual std::pair<u8*, GLintptr> Map(size_t size, size_t alignment) = 0;
virtual void Unmap() = 0;
/*
* Allocates a linear chunk of memory in the GPU buffer with at least "size" bytes
* and the optional alignment requirement.
* If the buffer is full, the whole buffer is reallocated which invalidates old chunks.
* The return values are the pointer to the new chunk, the offset within the buffer,
* and the invalidation flag for previous chunks.
* The actual used size must be specified on unmapping the chunk.
*/
std::tuple<u8*, GLintptr, bool> Map(GLsizeiptr size, GLintptr alignment = 0);
protected:
void Unmap(GLsizeiptr size);
private:
OGLBuffer gl_buffer;
GLenum gl_target;
size_t buffer_pos = 0;
size_t buffer_size = 0;
size_t buffer_sync_subdivide = 0;
size_t mapped_size = 0;
bool coherent = false;
bool persistent = false;
GLintptr buffer_pos = 0;
GLsizeiptr buffer_size = 0;
GLintptr mapped_offset = 0;
GLsizeiptr mapped_size = 0;
u8* mapped_ptr = nullptr;
};