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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 <memory>
#include <vector>
#include <glad/glad.h>
#include "common/common_types.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/memory_manager.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_shader_manager.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 method) override;
void FlushAll() override;
void FlushRegion(Tegra::GPUVAddr addr, u64 size) override;
void InvalidateRegion(Tegra::GPUVAddr addr, u64 size) override;
void FlushAndInvalidateRegion(Tegra::GPUVAddr 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
OGLProgram shader;
};
struct VertexShader {
OGLShader shader;
};
struct FragmentShader {
OGLShader shader;
};
/// Maximum supported size that a constbuffer can have in bytes.
static constexpr size_t MaxConstbufferSize = 0x10000;
static_assert(MaxConstbufferSize % sizeof(GLvec4) == 0,
"The maximum size of a constbuffer must be a multiple of the size of GLvec4");
private:
class SamplerInfo {
public:
OGLSampler sampler;
/// Creates the sampler object, initializing its state so that it's in sync with the
/// SamplerInfo struct.
void Create();
/// Syncs the sampler object with the config, updating any necessary state.
void SyncWithConfig(const Tegra::Texture::TSCEntry& config);
private:
Tegra::Texture::TextureFilter mag_filter;
Tegra::Texture::TextureFilter min_filter;
Tegra::Texture::WrapMode wrap_u;
Tegra::Texture::WrapMode wrap_v;
u32 border_color_r;
u32 border_color_g;
u32 border_color_b;
u32 border_color_a;
};
/// Binds the framebuffer color and depth surface
void BindFramebufferSurfaces(const Surface& color_surface, const Surface& depth_surface,
bool has_stencil);
/*
* Configures the current constbuffers to use for the draw command.
* @param stage The shader stage to configure buffers for.
* @param program The OpenGL program object that contains the specified stage.
* @param current_bindpoint The offset at which to start counting new buffer bindpoints.
* @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);
/*
* Configures the current textures to use for the draw command.
* @param stage The shader stage to configure textures for.
* @param program The OpenGL program object that contains the specified stage.
* @param current_unit The offset at which to start counting unused texture units.
* @param entries Vector describing the textures that are actually used in the guest shader.
* @returns The next available bindpoint for use in the next shader stage.
*/
u32 SetupTextures(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage, GLuint program,
u32 current_unit, const std::vector<GLShader::SamplerEntry>& entries);
/// Syncs the viewport to match the guest state
void SyncViewport(const MathUtil::Rectangle<u32>& surfaces_rect);
/// Syncs the clip enabled status to match the guest state
void SyncClipEnabled();
/// Syncs the clip coefficients to match the guest state
void SyncClipCoef();
/// 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 depth test state to match the guest state
void SyncDepthTestState();
/// Syncs the blend state to match the guest state
void SyncBlendState();
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;
std::unique_ptr<GLShader::ProgramManager> shader_program_manager;
OGLVertexArray sw_vao;
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;
OGLBuffer uniform_buffer;
OGLFramebuffer framebuffer;
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;
void SetupShaders(u8* buffer_ptr, GLintptr buffer_offset);
enum class AccelDraw { Disabled, Arrays, Indexed };
AccelDraw accelerate_draw;
};
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