renderer_opengl: Implement a new shader cache.

src/video_core/renderer_opengl/gl_shader_cache.h

@@ -0,0 +1,69 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <unordered_map>
+
+#include "common/common_types.h"
+#include "video_core/memory_manager.h"
+#include "video_core/rasterizer_cache.h"
+#include "video_core/renderer_opengl/gl_resource_manager.h"
+#include "video_core/renderer_opengl/gl_shader_gen.h"
+
+namespace OpenGL {
+
+class CachedShader;
+using Shader = std::shared_ptr<CachedShader>;
+using Maxwell = Tegra::Engines::Maxwell3D::Regs;
+
+class CachedShader final {
+public:
+    CachedShader(Tegra::GPUVAddr addr, Maxwell::ShaderProgram program_type);
+
+    /// Gets the address of the shader in guest memory, required for cache management
+    Tegra::GPUVAddr GetAddr() const {
+        return addr;
+    }
+
+    /// Gets the size of the shader in guest memory, required for cache management
+    size_t GetSizeInBytes() const {
+        return sizeof(GLShader::ProgramCode);
+    }
+
+    /// Gets the shader entries for the shader
+    const GLShader::ShaderEntries& GetShaderEntries() const {
+        return entries;
+    }
+
+    /// Gets the GL program handle for the shader
+    GLuint GetProgramHandle() const {
+        return program.handle;
+    }
+
+    /// Gets the GL program resource location for the specified resource, caching as needed
+    GLuint GetProgramResourceIndex(const std::string& name);
+
+    /// Gets the GL uniform location for the specified resource, caching as needed
+    GLint GetUniformLocation(const std::string& name);
+
+private:
+    Tegra::GPUVAddr addr;
+    Maxwell::ShaderProgram program_type;
+    GLShader::ShaderSetup setup;
+    GLShader::ShaderEntries entries;
+    OGLProgram program;
+
+    std::unordered_map<std::string, GLuint> resource_cache;
+    std::unordered_map<std::string, GLint> uniform_cache;
+};
+
+class ShaderCacheOpenGL final : public RasterizerCache<Shader> {
+public:
+    /// Gets the current specified shader stage program
+    Shader GetStageProgram(Maxwell::ShaderProgram program);
+};
+
+} // namespace OpenGL