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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 <cstddef>
#include <cstring>
#include <memory>
#include <unordered_map>
#include <vector>
#include <glad/glad.h>
#include "common/bit_field.h"
#include "common/common_types.h"
#include "common/hash.h"
#include "common/vector_math.h"
#include "video_core/rasterizer_interface.h"
#include "video_core/renderer_opengl/gl_rasterizer_cache.h"
#include "video_core/renderer_opengl/gl_resource_manager.h"
#include "video_core/renderer_opengl/gl_shader_gen.h"
#include "video_core/renderer_opengl/gl_state.h"
#include "video_core/renderer_opengl/gl_stream_buffer.h"
struct ScreenInfo;
class RasterizerOpenGL : public VideoCore::RasterizerInterface {
public:
RasterizerOpenGL();
~RasterizerOpenGL() override;
void DrawArrays() override;
void NotifyMaxwellRegisterChanged(u32 id) override;
void FlushAll() override;
void FlushRegion(VAddr addr, u64 size) override;
void InvalidateRegion(VAddr addr, u64 size) override;
void FlushAndInvalidateRegion(VAddr addr, u64 size) override;
bool AccelerateDisplayTransfer(const void* config) override;
bool AccelerateTextureCopy(const void* config) override;
bool AccelerateFill(const void* config) override;
bool AccelerateDisplay(const Tegra::FramebufferConfig& framebuffer, VAddr framebuffer_addr,
u32 pixel_stride, ScreenInfo& screen_info) override;
bool AccelerateDrawBatch(bool is_indexed) override;
/// OpenGL shader generated for a given Maxwell register state
struct MaxwellShader {
/// OpenGL shader resource
OGLShader shader;
};
struct VertexShader {
OGLShader shader;
};
struct FragmentShader {
OGLShader shader;
};
/// Uniform structure for the Uniform Buffer Object, all vectors must be 16-byte aligned
// NOTE: Always keep a vec4 at the end. The GL spec is not clear wether the alignment at
// the end of a uniform block is included in UNIFORM_BLOCK_DATA_SIZE or not.
// Not following that rule will cause problems on some AMD drivers.
struct UniformData {};
// static_assert(
// sizeof(UniformData) == 0x460,
// "The size of the UniformData structure has changed, update the structure in the shader");
static_assert(sizeof(UniformData) < 16384,
"UniformData structure must be less than 16kb as per the OpenGL spec");
struct VSUniformData {};
// static_assert(
// sizeof(VSUniformData) == 1856,
// "The size of the VSUniformData structure has changed, update the structure in the
// shader");
static_assert(sizeof(VSUniformData) < 16384,
"VSUniformData structure must be less than 16kb as per the OpenGL spec");
struct FSUniformData {};
// static_assert(
// sizeof(FSUniformData) == 1856,
// "The size of the FSUniformData structure has changed, update the structure in the
// shader");
static_assert(sizeof(FSUniformData) < 16384,
"FSUniformData structure must be less than 16kb as per the OpenGL spec");
private:
struct SamplerInfo {};
/// Syncs the viewport to match the guest state
void SyncViewport(const MathUtil::Rectangle<u32>& surfaces_rect, u16 res_scale);
/// Syncs the clip enabled status to match the guest state
void SyncClipEnabled();
/// Syncs the clip coefficients to match the guest state
void SyncClipCoef();
/// Sets the OpenGL shader in accordance with the current guest state
void SetShader();
/// Syncs the cull mode to match the guest state
void SyncCullMode();
/// Syncs the depth scale to match the guest state
void SyncDepthScale();
/// Syncs the depth offset to match the guest state
void SyncDepthOffset();
/// Syncs the blend enabled status to match the guest state
void SyncBlendEnabled();
/// Syncs the blend functions to match the guest state
void SyncBlendFuncs();
/// Syncs the blend color to match the guest state
void SyncBlendColor();
bool has_ARB_buffer_storage;
bool has_ARB_direct_state_access;
bool has_ARB_separate_shader_objects;
bool has_ARB_vertex_attrib_binding;
OpenGLState state;
RasterizerCacheOpenGL res_cache;
/// Shader used for test renderering - to be removed once we have emulated shaders
MaxwellShader test_shader{};
const MaxwellShader* current_shader{};
bool shader_dirty{};
struct {
UniformData data;
bool dirty;
} uniform_block_data = {};
OGLPipeline pipeline;
OGLVertexArray sw_vao;
OGLVertexArray hw_vao;
std::array<bool, 16> hw_vao_enabled_attributes;
std::array<SamplerInfo, 32> texture_samplers;
static constexpr size_t VERTEX_BUFFER_SIZE = 128 * 1024 * 1024;
std::unique_ptr<OGLStreamBuffer> vertex_buffer;
OGLBuffer uniform_buffer;
OGLFramebuffer framebuffer;
static constexpr size_t STREAM_BUFFER_SIZE = 4 * 1024 * 1024;
std::unique_ptr<OGLStreamBuffer> stream_buffer;
GLsizeiptr vs_input_size;
void AnalyzeVertexArray(bool is_indexed);
void SetupVertexArray(u8* array_ptr, GLintptr buffer_offset);
OGLBuffer vs_uniform_buffer;
std::unordered_map<GLShader::MaxwellVSConfig, VertexShader*> vs_shader_map;
std::unordered_map<std::string, VertexShader> vs_shader_cache;
OGLShader vs_default_shader;
void SetupVertexShader(VSUniformData* ub_ptr, GLintptr buffer_offset);
OGLBuffer fs_uniform_buffer;
std::unordered_map<GLShader::MaxwellFSConfig, FragmentShader*> fs_shader_map;
std::unordered_map<std::string, FragmentShader> fs_shader_cache;
OGLShader fs_default_shader;
void SetupFragmentShader(FSUniformData* ub_ptr, GLintptr buffer_offset);
enum class AccelDraw { Disabled, Arrays, Indexed };
AccelDraw accelerate_draw;
};
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