// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <memory>
#include <string>
#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/settings.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/renderer_opengl/gl_rasterizer.h"
#include "video_core/renderer_opengl/gl_shader_gen.h"
#include "video_core/renderer_opengl/maxwell_to_gl.h"
#include "video_core/renderer_opengl/renderer_opengl.h"
using Maxwell = Tegra::Engines::Maxwell3D::Regs;
using PixelFormat = SurfaceParams::PixelFormat;
using SurfaceType = SurfaceParams::SurfaceType;
MICROPROFILE_DEFINE(OpenGL_VAO, "OpenGL", "Vertex Array Setup", MP_RGB(128, 128, 192));
MICROPROFILE_DEFINE(OpenGL_VS, "OpenGL", "Vertex Shader Setup", MP_RGB(128, 128, 192));
MICROPROFILE_DEFINE(OpenGL_FS, "OpenGL", "Fragment Shader Setup", MP_RGB(128, 128, 192));
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() {
has_ARB_buffer_storage = false;
has_ARB_direct_state_access = false;
has_ARB_separate_shader_objects = false;
has_ARB_vertex_attrib_binding = false;
// 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++) {
std::string 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") {
has_ARB_direct_state_access = true;
} else if (extension == "GL_ARB_separate_shader_objects") {
has_ARB_separate_shader_objects = true;
} else if (extension == "GL_ARB_vertex_attrib_binding") {
has_ARB_vertex_attrib_binding = true;
}
}
ASSERT_MSG(has_ARB_separate_shader_objects, "has_ARB_separate_shader_objects is unsupported");
// Clipping plane 0 is always enabled for PICA fixed clip plane z <= 0
state.clip_distance[0] = true;
// Generate VAO and UBO
sw_vao.Create();
uniform_buffer.Create();
state.draw.vertex_array = sw_vao.handle;
state.draw.uniform_buffer = uniform_buffer.handle;
state.Apply();
// Create render framebuffer
framebuffer.Create();
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();
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);
}
accelerate_draw = AccelDraw::Disabled;
glEnable(GL_BLEND);
NGLOG_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();
}
}
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.Apply();
// Upload all guest vertex arrays sequentially to our buffer
for (u32 index = 0; index < Maxwell::NumVertexArrays; ++index) {
const auto& vertex_array = regs.vertex_array[index];
if (!vertex_array.IsEnabled())
continue;
const Tegra::GPUVAddr start = vertex_array.StartAddress();
const Tegra::GPUVAddr end = regs.vertex_array_limit[index].LimitAddress();
ASSERT(end > start);
u64 size = end - start + 1;
// Copy vertex array data
Memory::ReadBlock(*memory_manager->GpuToCpuAddress(start), array_ptr, size);
// Bind the vertex array to the buffer at the current offset.
glBindVertexBuffer(index, stream_buffer->GetHandle(), 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.
// 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 (unsigned index = 0; index < 16; ++index) {
auto& attrib = regs.vertex_attrib_format[index];
NGLOG_DEBUG(HW_GPU, "vertex attrib {}, count={}, size={}, type={}, offset={}, normalize={}",
index, attrib.ComponentCount(), attrib.SizeString(), attrib.TypeString(),
attrib.offset.Value(), attrib.IsNormalized());
auto& buffer = regs.vertex_array[attrib.buffer];
ASSERT(buffer.IsEnabled());
glEnableVertexAttribArray(index);
glVertexAttribFormat(index, attrib.ComponentCount(), MaxwellToGL::VertexType(attrib),
attrib.IsNormalized() ? GL_TRUE : GL_FALSE, attrib.offset);
glVertexAttribBinding(index, attrib.buffer);
}
return {array_ptr, buffer_offset};
}
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);
}
};
auto& gpu = Core::System().GetInstance().GPU().Maxwell3D();
ASSERT_MSG(!gpu.regs.shader_config[0].enable, "VertexA is unsupported!");
// 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 = uniform_buffers.size();
u32 current_texture_bindpoint = 0;
for (unsigned index = 1; index < Maxwell::MaxShaderProgram; ++index) {
auto& shader_config = gpu.regs.shader_config[index];
const Maxwell::ShaderProgram program{static_cast<Maxwell::ShaderProgram>(index)};
const auto& stage = index - 1; // Stage indices are 0 - 5
const bool is_enabled = gpu.IsShaderStageEnabled(static_cast<Maxwell::ShaderStage>(stage));
// Skip stages that are not enabled
if (!is_enabled) {
continue;
}
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));
// 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);
// Fetch program code from memory
GLShader::ProgramCode program_code;
const u64 gpu_address{gpu.regs.code_address.CodeAddress() + shader_config.offset};
const boost::optional<VAddr> cpu_address{gpu.memory_manager.GpuToCpuAddress(gpu_address)};
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_resources =
shader_program_manager->UseProgrammableVertexShader(vs_config, setup);
break;
}
case Maxwell::ShaderProgram::Fragment: {
GLShader::MaxwellFSConfig fs_config{setup};
shader_resources =
shader_program_manager->UseProgrammableFragmentShader(fs_config, setup);
break;
}
default:
NGLOG_CRITICAL(HW_GPU, "Unimplemented shader index={}, enable={}, offset=0x{:08X}",
index, shader_config.enable.Value(), shader_config.offset);
UNREACHABLE();
}
GLuint gl_stage_program = shader_program_manager->GetCurrentProgramStage(
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);
// Configure the textures for this shader stage.
current_texture_bindpoint =
SetupTextures(static_cast<Maxwell::ShaderStage>(stage), gl_stage_program,
current_texture_bindpoint, shader_resources.texture_samplers);
}
shader_program_manager->UseTrivialGeometryShader();
}
size_t RasterizerOpenGL::CalculateVertexArraysSize() const {
const auto& regs = Core::System().GetInstance().GPU().Maxwell3D().regs;
size_t size = 0;
for (u32 index = 0; index < Maxwell::NumVertexArrays; ++index) {
if (!regs.vertex_array[index].IsEnabled())
continue;
const Tegra::GPUVAddr start = regs.vertex_array[index].StartAddress();
const Tegra::GPUVAddr end = regs.vertex_array_limit[index].LimitAddress();
ASSERT(end > start);
size += end - start + 1;
}
return size;
}
bool RasterizerOpenGL::AccelerateDrawBatch(bool is_indexed) {
accelerate_draw = is_indexed ? AccelDraw::Indexed : AccelDraw::Arrays;
DrawArrays();
return true;
}
std::pair<Surface, Surface> RasterizerOpenGL::ConfigureFramebuffers() {
const auto& regs = Core::System().GetInstance().GPU().Maxwell3D().regs;
// Sync the depth test state before configuring the framebuffer surfaces.
SyncDepthTestState();
// TODO(bunnei): Implement this
const bool has_stencil = false;
const bool using_color_fb = true;
const bool using_depth_fb = regs.zeta.Address() != 0;
const MathUtil::Rectangle<s32> viewport_rect{regs.viewport_transform[0].GetRect()};
const bool write_color_fb =
state.color_mask.red_enabled == GL_TRUE || state.color_mask.green_enabled == GL_TRUE ||
state.color_mask.blue_enabled == GL_TRUE || state.color_mask.alpha_enabled == GL_TRUE;
const bool write_depth_fb =
(state.depth.test_enabled && state.depth.write_mask == GL_TRUE) ||
(has_stencil && state.stencil.test_enabled && state.stencil.write_mask != 0);
Surface color_surface;
Surface depth_surface;
MathUtil::Rectangle<u32> surfaces_rect;
std::tie(color_surface, depth_surface, surfaces_rect) =
res_cache.GetFramebufferSurfaces(using_color_fb, using_depth_fb, viewport_rect);
MathUtil::Rectangle<u32> draw_rect{
static_cast<u32>(std::clamp<s32>(static_cast<s32>(surfaces_rect.left) + viewport_rect.left,
surfaces_rect.left, surfaces_rect.right)), // Left
static_cast<u32>(std::clamp<s32>(static_cast<s32>(surfaces_rect.bottom) + viewport_rect.top,
surfaces_rect.bottom, surfaces_rect.top)), // Top
static_cast<u32>(std::clamp<s32>(static_cast<s32>(surfaces_rect.left) + viewport_rect.right,
surfaces_rect.left, surfaces_rect.right)), // Right
static_cast<u32>(
std::clamp<s32>(static_cast<s32>(surfaces_rect.bottom) + viewport_rect.bottom,
surfaces_rect.bottom, surfaces_rect.top))}; // Bottom
// Bind the framebuffer surfaces
BindFramebufferSurfaces(color_surface, depth_surface, has_stencil);
SyncViewport(surfaces_rect);
// Viewport can have negative offsets or larger dimensions than our framebuffer sub-rect. Enable
// scissor test to prevent drawing outside of the framebuffer region
state.scissor.enabled = true;
state.scissor.x = draw_rect.left;
state.scissor.y = draw_rect.bottom;
state.scissor.width = draw_rect.GetWidth();
state.scissor.height = draw_rect.GetHeight();
state.Apply();
// Only return the surface to be marked as dirty if writing to it is enabled.
return std::make_pair(write_color_fb ? color_surface : nullptr,
write_depth_fb ? depth_surface : nullptr);
}
void RasterizerOpenGL::Clear() {
const auto& regs = Core::System().GetInstance().GPU().Maxwell3D().regs;
GLbitfield clear_mask = 0;
if (regs.clear_buffers.R && regs.clear_buffers.G && regs.clear_buffers.B &&
regs.clear_buffers.A) {
clear_mask |= GL_COLOR_BUFFER_BIT;
}
if (regs.clear_buffers.Z)
clear_mask |= GL_DEPTH_BUFFER_BIT;
if (clear_mask == 0)
return;
auto [dirty_color_surface, dirty_depth_surface] = ConfigureFramebuffers();
// TODO(Subv): Support clearing only partial colors.
glClearColor(regs.clear_color[0], regs.clear_color[1], regs.clear_color[2],
regs.clear_color[3]);
glClearDepth(regs.clear_depth);
glClear(clear_mask);
// Mark framebuffer surfaces as dirty
if (dirty_color_surface != nullptr) {
res_cache.MarkSurfaceAsDirty(dirty_color_surface);
}
if (dirty_depth_surface != nullptr) {
res_cache.MarkSurfaceAsDirty(dirty_depth_surface);
}
}
void RasterizerOpenGL::DrawArrays() {
if (accelerate_draw == AccelDraw::Disabled)
return;
MICROPROFILE_SCOPE(OpenGL_Drawing);
const auto& regs = Core::System().GetInstance().GPU().Maxwell3D().regs;
auto [dirty_color_surface, dirty_depth_surface] = ConfigureFramebuffers();
SyncBlendState();
SyncCullMode();
// TODO(bunnei): Sync framebuffer_scale uniform here
// TODO(bunnei): Sync scissorbox uniform(s) here
// Draw the vertex batch
const bool is_indexed = accelerate_draw == AccelDraw::Indexed;
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.Apply();
size_t buffer_size = CalculateVertexArraysSize();
if (is_indexed) {
buffer_size = Common::AlignUp<size_t>(buffer_size, 4) + index_buffer_size;
}
// Uniform space for the 5 shader stages
buffer_size = Common::AlignUp<size_t>(buffer_size, 4) +
sizeof(GLShader::MaxwellUniformData) * Maxwell::MaxShaderStage;
u8* buffer_ptr;
GLintptr buffer_offset;
std::tie(buffer_ptr, buffer_offset) =
stream_buffer->Map(static_cast<GLsizeiptr>(buffer_size), 4);
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);
// 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;
}
offseted_buffer =
reinterpret_cast<u8*>(Common::AlignUp(reinterpret_cast<size_t>(offseted_buffer), 4));
buffer_offset = Common::AlignUp<size_t>(buffer_offset, 4);
SetupShaders(offseted_buffer, buffer_offset);
stream_buffer->Unmap();
shader_program_manager->ApplyTo(state);
state.Apply();
const GLenum primitive_mode{MaxwellToGL::PrimitiveTopology(regs.draw.topology)};
if (is_indexed) {
const GLint base_vertex{static_cast<GLint>(regs.vb_element_base)};
// Adjust the index buffer offset so it points to the first desired index.
index_buffer_offset += regs.index_array.first * regs.index_array.FormatSizeInBytes();
glDrawElementsBaseVertex(primitive_mode, regs.index_array.count,
MaxwellToGL::IndexFormat(regs.index_array.format),
reinterpret_cast<const void*>(index_buffer_offset), base_vertex);
} else {
glDrawArrays(primitive_mode, regs.vertex_buffer.first, regs.vertex_buffer.count);
}
// Disable scissor test
state.scissor.enabled = false;
accelerate_draw = AccelDraw::Disabled;
// Unbind textures for potential future use as framebuffer attachments
for (auto& texture_unit : state.texture_units) {
texture_unit.Unbind();
}
state.Apply();
// Mark framebuffer surfaces as dirty
if (dirty_color_surface != nullptr) {
res_cache.MarkSurfaceAsDirty(dirty_color_surface);
}
if (dirty_depth_surface != nullptr) {
res_cache.MarkSurfaceAsDirty(dirty_depth_surface);
}
}
void RasterizerOpenGL::NotifyMaxwellRegisterChanged(u32 method) {}
void RasterizerOpenGL::FlushAll() {
MICROPROFILE_SCOPE(OpenGL_CacheManagement);
res_cache.FlushRegion(0, Kernel::VMManager::MAX_ADDRESS);
}
void RasterizerOpenGL::FlushRegion(Tegra::GPUVAddr addr, u64 size) {
MICROPROFILE_SCOPE(OpenGL_CacheManagement);
res_cache.FlushRegion(addr, size);
}
void RasterizerOpenGL::InvalidateRegion(Tegra::GPUVAddr addr, u64 size) {
MICROPROFILE_SCOPE(OpenGL_CacheManagement);
res_cache.InvalidateRegion(addr, size);
}
void RasterizerOpenGL::FlushAndInvalidateRegion(Tegra::GPUVAddr addr, u64 size) {
MICROPROFILE_SCOPE(OpenGL_CacheManagement);
res_cache.FlushRegion(addr, size);
res_cache.InvalidateRegion(addr, size);
}
bool RasterizerOpenGL::AccelerateDisplayTransfer(const void* config) {
MICROPROFILE_SCOPE(OpenGL_Blits);
UNREACHABLE();
return true;
}
bool RasterizerOpenGL::AccelerateTextureCopy(const void* config) {
UNREACHABLE();
return true;
}
bool RasterizerOpenGL::AccelerateFill(const void* config) {
UNREACHABLE();
return true;
}
bool RasterizerOpenGL::AccelerateDisplay(const Tegra::FramebufferConfig& config,
VAddr framebuffer_addr, u32 pixel_stride,
ScreenInfo& screen_info) {
if (!framebuffer_addr) {
return {};
}
MICROPROFILE_SCOPE(OpenGL_CacheManagement);
const auto& surface{res_cache.TryFindFramebufferSurface(framebuffer_addr)};
if (!surface) {
return {};
}
// Verify that the cached surface is the same size and format as the requested framebuffer
const auto& params{surface->GetSurfaceParams()};
const auto& pixel_format{SurfaceParams::PixelFormatFromGPUPixelFormat(config.pixel_format)};
ASSERT_MSG(params.width == config.width, "Framebuffer width is different");
ASSERT_MSG(params.height == config.height, "Framebuffer height is different");
ASSERT_MSG(params.pixel_format == pixel_format, "Framebuffer pixel_format is different");
screen_info.display_texture = surface->Texture().handle;
return true;
}
void RasterizerOpenGL::SamplerInfo::Create() {
sampler.Create();
mag_filter = min_filter = Tegra::Texture::TextureFilter::Linear;
wrap_u = wrap_v = Tegra::Texture::WrapMode::Wrap;
border_color_r = border_color_g = border_color_b = border_color_a = 0;
// default is GL_LINEAR_MIPMAP_LINEAR
glSamplerParameteri(sampler.handle, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// Other attributes have correct defaults
}
void RasterizerOpenGL::SamplerInfo::SyncWithConfig(const Tegra::Texture::TSCEntry& config) {
GLuint s = sampler.handle;
if (mag_filter != config.mag_filter) {
mag_filter = config.mag_filter;
glSamplerParameteri(s, GL_TEXTURE_MAG_FILTER, MaxwellToGL::TextureFilterMode(mag_filter));
}
if (min_filter != config.min_filter) {
min_filter = config.min_filter;
glSamplerParameteri(s, GL_TEXTURE_MIN_FILTER, MaxwellToGL::TextureFilterMode(min_filter));
}
if (wrap_u != config.wrap_u) {
wrap_u = config.wrap_u;
glSamplerParameteri(s, GL_TEXTURE_WRAP_S, MaxwellToGL::WrapMode(wrap_u));
}
if (wrap_v != config.wrap_v) {
wrap_v = config.wrap_v;
glSamplerParameteri(s, GL_TEXTURE_WRAP_T, MaxwellToGL::WrapMode(wrap_v));
}
if (wrap_u == Tegra::Texture::WrapMode::Border || wrap_v == Tegra::Texture::WrapMode::Border) {
// TODO(Subv): Implement border color
ASSERT(false);
}
}
u32 RasterizerOpenGL::SetupConstBuffers(Maxwell::ShaderStage stage, GLuint program,
u32 current_bindpoint,
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
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()];
ASSERT_MSG(buffer.enabled, "Attempted to upload disabled constbuffer");
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()) {
// Buffer is accessed indirectly, so upload the entire thing
size = buffer.size * sizeof(float);
if (size > MaxConstbufferSize) {
NGLOG_ERROR(HW_GPU, "indirect constbuffer size {} exceeds maximum {}", size,
MaxConstbufferSize);
size = MaxConstbufferSize;
}
} else {
// Buffer is accessed directly, upload just what we use
size = used_buffer.GetSize() * sizeof(float);
}
// Align the actual size so it ends up being a multiple of vec4 to meet the OpenGL std140
// UBO alignment requirements.
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());
glBindBuffer(GL_UNIFORM_BUFFER, buffer_draw_state.ssbo);
glBufferData(GL_UNIFORM_BUFFER, data.size(), data.data(), GL_DYNAMIC_DRAW);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
// Now configure the bindpoint of the buffer inside the shader
std::string buffer_name = used_buffer.GetName();
GLuint index = glGetProgramResourceIndex(program, GL_UNIFORM_BLOCK, buffer_name.c_str());
if (index != -1)
glUniformBlockBinding(program, index, buffer_draw_state.bindpoint);
}
state.Apply();
return current_bindpoint + static_cast<u32>(entries.size());
}
u32 RasterizerOpenGL::SetupTextures(Maxwell::ShaderStage stage, GLuint program, u32 current_unit,
const std::vector<GLShader::SamplerEntry>& entries) {
auto& gpu = Core::System::GetInstance().GPU();
auto& maxwell3d = gpu.Get3DEngine();
ASSERT_MSG(maxwell3d.IsShaderStageEnabled(stage),
"Attempted to upload textures of disabled shader stage");
ASSERT_MSG(current_unit + entries.size() <= std::size(state.texture_units),
"Exceeded the number of active textures.");
for (u32 bindpoint = 0; bindpoint < entries.size(); ++bindpoint) {
const auto& entry = entries[bindpoint];
u32 current_bindpoint = current_unit + bindpoint;
// Bind the uniform to the sampler.
GLint uniform = glGetUniformLocation(program, entry.GetName().c_str());
ASSERT(uniform != -1);
glProgramUniform1i(program, uniform, current_bindpoint);
const auto texture = maxwell3d.GetStageTexture(entry.GetStage(), entry.GetOffset());
if (!texture.enabled) {
state.texture_units[current_bindpoint].texture_2d = 0;
continue;
}
texture_samplers[current_bindpoint].SyncWithConfig(texture.tsc);
Surface surface = res_cache.GetTextureSurface(texture);
if (surface != nullptr) {
state.texture_units[current_bindpoint].texture_2d = surface->Texture().handle;
state.texture_units[current_bindpoint].swizzle.r =
MaxwellToGL::SwizzleSource(texture.tic.x_source);
state.texture_units[current_bindpoint].swizzle.g =
MaxwellToGL::SwizzleSource(texture.tic.y_source);
state.texture_units[current_bindpoint].swizzle.b =
MaxwellToGL::SwizzleSource(texture.tic.z_source);
state.texture_units[current_bindpoint].swizzle.a =
MaxwellToGL::SwizzleSource(texture.tic.w_source);
} else {
// Can occur when texture addr is null or its memory is unmapped/invalid
state.texture_units[current_bindpoint].texture_2d = 0;
}
}
state.Apply();
return current_unit + static_cast<u32>(entries.size());
}
void RasterizerOpenGL::BindFramebufferSurfaces(const Surface& color_surface,
const Surface& depth_surface, bool has_stencil) {
state.draw.draw_framebuffer = framebuffer.handle;
state.Apply();
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
color_surface != nullptr ? color_surface->Texture().handle : 0, 0);
if (depth_surface != nullptr) {
if (has_stencil) {
// attach both depth and stencil
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D,
depth_surface->Texture().handle, 0);
} else {
// attach depth
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D,
depth_surface->Texture().handle, 0);
// clear stencil attachment
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
}
} else {
// clear both depth and stencil attachment
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0,
0);
}
}
void RasterizerOpenGL::SyncViewport(const MathUtil::Rectangle<u32>& surfaces_rect) {
const auto& regs = Core::System().GetInstance().GPU().Maxwell3D().regs;
const MathUtil::Rectangle<s32> viewport_rect{regs.viewport_transform[0].GetRect()};
state.viewport.x = static_cast<GLint>(surfaces_rect.left) + viewport_rect.left;
state.viewport.y = static_cast<GLint>(surfaces_rect.bottom) + viewport_rect.bottom;
state.viewport.width = static_cast<GLsizei>(viewport_rect.GetWidth());
state.viewport.height = static_cast<GLsizei>(viewport_rect.GetHeight());
}
void RasterizerOpenGL::SyncClipEnabled() {
UNREACHABLE();
}
void RasterizerOpenGL::SyncClipCoef() {
UNREACHABLE();
}
void RasterizerOpenGL::SyncCullMode() {
const auto& regs = Core::System().GetInstance().GPU().Maxwell3D().regs;
state.cull.enabled = regs.cull.enabled != 0;
state.cull.front_face = MaxwellToGL::FrontFace(regs.cull.front_face);
state.cull.mode = MaxwellToGL::CullFace(regs.cull.cull_face);
}
void RasterizerOpenGL::SyncDepthScale() {
UNREACHABLE();
}
void RasterizerOpenGL::SyncDepthOffset() {
UNREACHABLE();
}
void RasterizerOpenGL::SyncDepthTestState() {
const auto& regs = Core::System().GetInstance().GPU().Maxwell3D().regs;
state.depth.test_enabled = regs.depth_test_enable != 0;
state.depth.write_mask = regs.depth_write_enabled ? GL_TRUE : GL_FALSE;
state.depth.test_func = MaxwellToGL::ComparisonOp(regs.depth_test_func);
}
void RasterizerOpenGL::SyncBlendState() {
const auto& regs = Core::System().GetInstance().GPU().Maxwell3D().regs;
// TODO(Subv): Support more than just render target 0.
state.blend.enabled = regs.blend.enable[0] != 0;
if (!state.blend.enabled)
return;
ASSERT_MSG(regs.independent_blend_enable == 1, "Only independent blending is implemented");
ASSERT_MSG(!regs.independent_blend[0].separate_alpha, "Unimplemented");
state.blend.rgb_equation = MaxwellToGL::BlendEquation(regs.independent_blend[0].equation_rgb);
state.blend.src_rgb_func = MaxwellToGL::BlendFunc(regs.independent_blend[0].factor_source_rgb);
state.blend.dst_rgb_func = MaxwellToGL::BlendFunc(regs.independent_blend[0].factor_dest_rgb);
state.blend.a_equation = MaxwellToGL::BlendEquation(regs.independent_blend[0].equation_a);
state.blend.src_a_func = MaxwellToGL::BlendFunc(regs.independent_blend[0].factor_source_a);
state.blend.dst_a_func = MaxwellToGL::BlendFunc(regs.independent_blend[0].factor_dest_a);
}