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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <map>
#include <memory>
#include <tuple>
#include <glad/glad.h>
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/rasterizer_cache.h"
#include "video_core/renderer_opengl/gl_resource_manager.h"
#include "video_core/renderer_opengl/gl_shader_decompiler.h"
#include "video_core/renderer_opengl/gl_shader_gen.h"
namespace OpenGL {
class CachedShader;
class RasterizerOpenGL;
using Shader = std::shared_ptr<CachedShader>;
using Maxwell = Tegra::Engines::Maxwell3D::Regs;
struct BaseBindings {
u32 cbuf{};
u32 gmem{};
u32 sampler{};
bool operator<(const BaseBindings& rhs) const {
return std::tie(cbuf, gmem, sampler) < std::tie(rhs.cbuf, rhs.gmem, rhs.sampler);
}
};
class CachedShader final : public RasterizerCacheObject {
public:
CachedShader(VAddr addr, Maxwell::ShaderProgram program_type);
VAddr GetAddr() const override {
return addr;
}
std::size_t GetSizeInBytes() const override {
return shader_length;
}
// We do not have to flush this cache as things in it are never modified by us.
void Flush() override {}
/// Gets the shader entries for the shader
const GLShader::ShaderEntries& GetShaderEntries() const {
return entries;
}
/// Gets the GL program handle for the shader
std::tuple<GLuint, BaseBindings> GetProgramHandle(GLenum primitive_mode,
BaseBindings base_bindings);
private:
// Geometry programs. These are needed because GLSL needs an input topology but it's not
// declared by the hardware. Workaround this issue by generating a different shader per input
// topology class.
struct GeometryPrograms {
OGLProgram points;
OGLProgram lines;
OGLProgram lines_adjacency;
OGLProgram triangles;
OGLProgram triangles_adjacency;
};
std::string AllocateBindings(BaseBindings base_bindings);
GLuint GetGeometryShader(GLenum primitive_mode, BaseBindings base_bindings);
/// Generates a geometry shader or returns one that already exists.
GLuint LazyGeometryProgram(OGLProgram& target_program, BaseBindings base_bindings,
const std::string& glsl_topology, u32 max_vertices,
const std::string& debug_name);
void CalculateProperties();
VAddr addr{};
std::size_t shader_length{};
Maxwell::ShaderProgram program_type{};
GLShader::ShaderSetup setup;
GLShader::ShaderEntries entries;
std::string code;
std::map<BaseBindings, OGLProgram> programs;
std::map<BaseBindings, GeometryPrograms> geometry_programs;
std::map<u32, GLuint> cbuf_resource_cache;
std::map<u32, GLuint> gmem_resource_cache;
std::map<u32, GLint> uniform_cache;
};
class ShaderCacheOpenGL final : public RasterizerCache<Shader> {
public:
explicit ShaderCacheOpenGL(RasterizerOpenGL& rasterizer);
/// Gets the current specified shader stage program
Shader GetStageProgram(Maxwell::ShaderProgram program);
private:
std::array<Shader, Maxwell::MaxShaderProgram> last_shaders;
};
} // namespace OpenGL
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