// 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 <map>
#include <memory>
#include <optional>
#include <tuple>
#include <utility>
#include <vector>
#include <boost/icl/interval_map.hpp>
#include <boost/range/iterator_range.hpp>
#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_cache.h"
#include "video_core/rasterizer_interface.h"
#include "video_core/renderer_opengl/gl_buffer_cache.h"
#include "video_core/renderer_opengl/gl_primitive_assembler.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_cache.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"
namespace Core::Frontend {
class EmuWindow;
}
namespace OpenGL {
struct ScreenInfo;
struct DrawParameters;
class RasterizerOpenGL : public VideoCore::RasterizerInterface {
public:
explicit RasterizerOpenGL(Core::Frontend::EmuWindow& renderer, ScreenInfo& info);
~RasterizerOpenGL() override;
void DrawArrays() override;
void Clear() 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 AccelerateSurfaceCopy(const Tegra::Engines::Fermi2D::Regs::Surface& src,
const Tegra::Engines::Fermi2D::Regs::Surface& dst) override;
bool AccelerateFill(const void* config) override;
bool AccelerateDisplay(const Tegra::FramebufferConfig& config, VAddr framebuffer_addr,
u32 pixel_stride) override;
bool AccelerateDrawBatch(bool is_indexed) override;
void UpdatePagesCachedCount(Tegra::GPUVAddr addr, u64 size, int delta) 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 std::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& info);
private:
Tegra::Texture::TextureFilter mag_filter = Tegra::Texture::TextureFilter::Nearest;
Tegra::Texture::TextureFilter min_filter = Tegra::Texture::TextureFilter::Nearest;
Tegra::Texture::TextureMipmapFilter mip_filter = Tegra::Texture::TextureMipmapFilter::None;
Tegra::Texture::WrapMode wrap_u = Tegra::Texture::WrapMode::ClampToEdge;
Tegra::Texture::WrapMode wrap_v = Tegra::Texture::WrapMode::ClampToEdge;
Tegra::Texture::WrapMode wrap_p = Tegra::Texture::WrapMode::ClampToEdge;
bool uses_depth_compare = false;
Tegra::Texture::DepthCompareFunc depth_compare_func =
Tegra::Texture::DepthCompareFunc::Always;
GLvec4 border_color = {};
float min_lod = 0.0f;
float max_lod = 16.0f;
float lod_bias = 0.0f;
float max_anisotropic = 1.0f;
};
/**
* Configures the color and depth framebuffer states.
* @param use_color_fb If true, configure color framebuffers.
* @param using_depth_fb If true, configure the depth/stencil framebuffer.
* @param preserve_contents If true, tries to preserve data from a previously used framebuffer.
* @param single_color_target Specifies if a single color buffer target should be used.
*/
void ConfigureFramebuffers(OpenGLState& current_state, bool use_color_fb = true,
bool using_depth_fb = true, bool preserve_contents = true,
std::optional<std::size_t> single_color_target = {});
/*
* Configures the current constbuffers to use for the draw command.
* @param stage The shader stage to configure buffers for.
* @param shader The shader object that contains the specified stage.
* @param current_bindpoint The offset at which to start counting new buffer bindpoints.
* @returns The next available bindpoint for use in the next shader stage.
*/
u32 SetupConstBuffers(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage, Shader& shader,
GLenum primitive_mode, u32 current_bindpoint);
/*
* Configures the current textures to use for the draw command.
* @param stage The shader stage to configure textures for.
* @param shader The shader object that contains the specified stage.
* @param current_unit The offset at which to start counting unused texture units.
* @returns The next available bindpoint for use in the next shader stage.
*/
u32 SetupTextures(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage, Shader& shader,
GLenum primitive_mode, u32 current_unit);
/// 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();
/// 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();
/// Check asserts for alpha testing.
void CheckAlphaTests();
/// Check for extension that are not strictly required
/// but are needed for correct emulation
void CheckExtensions();
bool has_ARB_direct_state_access = false;
bool has_ARB_multi_bind = false;
OpenGLState state;
RasterizerCacheOpenGL res_cache;
ShaderCacheOpenGL shader_cache;
Core::Frontend::EmuWindow& emu_window;
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;
std::array<SamplerInfo, Tegra::Engines::Maxwell3D::Regs::NumTextureSamplers> texture_samplers;
static constexpr std::size_t STREAM_BUFFER_SIZE = 128 * 1024 * 1024;
OGLBufferCache buffer_cache;
OGLFramebuffer framebuffer;
PrimitiveAssembler primitive_assembler{buffer_cache};
GLint uniform_buffer_alignment;
std::size_t CalculateVertexArraysSize() const;
std::size_t CalculateIndexBufferSize() const;
void SetupVertexFormat();
void SetupVertexBuffer();
DrawParameters SetupDraw();
void SetupShaders(GLenum primitive_mode);
enum class AccelDraw { Disabled, Arrays, Indexed };
AccelDraw accelerate_draw = AccelDraw::Disabled;
using CachedPageMap = boost::icl::interval_map<u64, int>;
CachedPageMap cached_pages;
};
} // namespace OpenGL
