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// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <atomic>
#include <cstddef>
#include <map>
#include <memory>
#include <optional>
#include <tuple>
#include <utility>
#include <glad/glad.h>
#include "common/common_types.h"
#include "video_core/engines/const_buffer_info.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/rasterizer_accelerated.h"
#include "video_core/rasterizer_cache.h"
#include "video_core/rasterizer_interface.h"
#include "video_core/renderer_opengl/gl_buffer_cache.h"
#include "video_core/renderer_opengl/gl_device.h"
#include "video_core/renderer_opengl/gl_framebuffer_cache.h"
#include "video_core/renderer_opengl/gl_resource_manager.h"
#include "video_core/renderer_opengl/gl_sampler_cache.h"
#include "video_core/renderer_opengl/gl_shader_cache.h"
#include "video_core/renderer_opengl/gl_shader_decompiler.h"
#include "video_core/renderer_opengl/gl_shader_manager.h"
#include "video_core/renderer_opengl/gl_state.h"
#include "video_core/renderer_opengl/gl_texture_cache.h"
#include "video_core/renderer_opengl/utils.h"
#include "video_core/textures/texture.h"
namespace Core {
class System;
}
namespace Core::Frontend {
class EmuWindow;
}
namespace Tegra {
class MemoryManager;
}
namespace OpenGL {
struct ScreenInfo;
struct DrawParameters;
class RasterizerOpenGL : public VideoCore::RasterizerAccelerated {
public:
explicit RasterizerOpenGL(Core::System& system, Core::Frontend::EmuWindow& emu_window,
ScreenInfo& info);
~RasterizerOpenGL() override;
bool DrawBatch(bool is_indexed) override;
bool DrawMultiBatch(bool is_indexed) override;
void Clear() override;
void DispatchCompute(GPUVAddr code_addr) override;
void FlushAll() override;
void FlushRegion(CacheAddr addr, u64 size) override;
void InvalidateRegion(CacheAddr addr, u64 size) override;
void FlushAndInvalidateRegion(CacheAddr addr, u64 size) override;
void FlushCommands() override;
void TickFrame() override;
bool AccelerateSurfaceCopy(const Tegra::Engines::Fermi2D::Regs::Surface& src,
const Tegra::Engines::Fermi2D::Regs::Surface& dst,
const Tegra::Engines::Fermi2D::Config& copy_config) override;
bool AccelerateDisplay(const Tegra::FramebufferConfig& config, VAddr framebuffer_addr,
u32 pixel_stride) override;
void LoadDiskResources(const std::atomic_bool& stop_loading,
const VideoCore::DiskResourceLoadCallback& callback) override;
private:
/// Configures the color and depth framebuffer states.
void ConfigureFramebuffers();
void ConfigureClearFramebuffer(OpenGLState& current_state, bool using_color_fb,
bool using_depth_fb, bool using_stencil_fb);
/// Configures the current constbuffers to use for the draw command.
void SetupDrawConstBuffers(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage,
const Shader& shader);
/// Configures the current constbuffers to use for the kernel invocation.
void SetupComputeConstBuffers(const Shader& kernel);
/// Configures a constant buffer.
void SetupConstBuffer(const Tegra::Engines::ConstBufferInfo& buffer,
const GLShader::ConstBufferEntry& entry);
/// Configures the current global memory entries to use for the draw command.
void SetupDrawGlobalMemory(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage,
const Shader& shader);
/// Configures the current global memory entries to use for the kernel invocation.
void SetupComputeGlobalMemory(const Shader& kernel);
/// Configures a constant buffer.
void SetupGlobalMemory(const GLShader::GlobalMemoryEntry& entry, GPUVAddr gpu_addr,
std::size_t size);
/// Syncs all the state, shaders, render targets and textures setting before a draw call.
void DrawPrelude();
/// Configures the current textures to use for the draw command.
void SetupDrawTextures(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage, const Shader& shader,
BaseBindings base_bindings);
/// Configures the textures used in a compute shader.
void SetupComputeTextures(const Shader& kernel);
/// Configures a texture.
void SetupTexture(u32 binding, const Tegra::Texture::FullTextureInfo& texture,
const GLShader::SamplerEntry& entry);
/// Configures images in a compute shader.
void SetupComputeImages(const Shader& shader);
/// Configures an image.
void SetupImage(u32 binding, const Tegra::Texture::TICEntry& tic,
const GLShader::ImageEntry& entry);
/// Syncs the viewport and depth range to match the guest state
void SyncViewport(OpenGLState& current_state);
/// Syncs the clip enabled status to match the guest state
void SyncClipEnabled(
const std::array<bool, Tegra::Engines::Maxwell3D::Regs::NumClipDistances>& clip_mask);
/// Syncs the clip coefficients to match the guest state
void SyncClipCoef();
/// Syncs the cull mode to match the guest state
void SyncCullMode();
/// Syncs the primitve restart to match the guest state
void SyncPrimitiveRestart();
/// Syncs the depth test state to match the guest state
void SyncDepthTestState();
/// Syncs the stencil test state to match the guest state
void SyncStencilTestState();
/// Syncs the blend state to match the guest state
void SyncBlendState();
/// Syncs the LogicOp state to match the guest state
void SyncLogicOpState();
/// Syncs the the color clamp state
void SyncFragmentColorClampState();
/// Syncs the alpha coverage and alpha to one
void SyncMultiSampleState();
/// Syncs the scissor test state to match the guest state
void SyncScissorTest(OpenGLState& current_state);
/// Syncs the transform feedback state to match the guest state
void SyncTransformFeedback();
/// Syncs the point state to match the guest state
void SyncPointState();
/// Syncs Color Mask
void SyncColorMask();
/// Syncs the polygon offsets
void SyncPolygonOffset();
/// Syncs the alpha test state to match the guest state
void SyncAlphaTest();
/// Check for extension that are not strictly required
/// but are needed for correct emulation
void CheckExtensions();
const Device device;
OpenGLState state;
TextureCacheOpenGL texture_cache;
ShaderCacheOpenGL shader_cache;
SamplerCacheOpenGL sampler_cache;
FramebufferCacheOpenGL framebuffer_cache;
Core::System& system;
ScreenInfo& screen_info;
std::unique_ptr<GLShader::ProgramManager> shader_program_manager;
std::map<std::array<Tegra::Engines::Maxwell3D::Regs::VertexAttribute,
Tegra::Engines::Maxwell3D::Regs::NumVertexAttributes>,
OGLVertexArray>
vertex_array_cache;
static constexpr std::size_t STREAM_BUFFER_SIZE = 128 * 1024 * 1024;
OGLBufferCache buffer_cache;
VertexArrayPushBuffer vertex_array_pushbuffer;
BindBuffersRangePushBuffer bind_ubo_pushbuffer{GL_UNIFORM_BUFFER};
BindBuffersRangePushBuffer bind_ssbo_pushbuffer{GL_SHADER_STORAGE_BUFFER};
std::size_t CalculateVertexArraysSize() const;
std::size_t CalculateIndexBufferSize() const;
/// Updates and returns a vertex array object representing current vertex format
GLuint SetupVertexFormat();
void SetupVertexBuffer(GLuint vao);
void SetupVertexInstances(GLuint vao);
GLintptr SetupIndexBuffer();
GLintptr index_buffer_offset;
void SetupShaders(GLenum primitive_mode);
enum class AccelDraw { Disabled, Arrays, Indexed };
AccelDraw accelerate_draw = AccelDraw::Disabled;
OGLFramebuffer clear_framebuffer;
};
} // namespace OpenGL
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