glsl_decompiler: Implementation

src/video_core/CMakeLists.txt

@@ -84,6 +84,8 @@ add_library(video_core STATIC
     shader/decode/xmad.cpp
     shader/decode/other.cpp
     shader/decode.cpp
+    shader/glsl_decompiler.cpp
+    shader/glsl_decompiler.h
     shader/shader_ir.cpp
     shader/shader_ir.h
     surface.cpp

src/video_core/shader/glsl_decompiler.h

@@ -0,0 +1,88 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <string>
+#include <utility>
+#include <vector>
+#include "common/common_types.h"
+#include "video_core/engines/maxwell_3d.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+class ShaderIR;
+}
+
+namespace OpenGL::GLShader {
+
+using Maxwell = Tegra::Engines::Maxwell3D::Regs;
+
+class ConstBufferEntry : public VideoCommon::Shader::ConstBuffer {
+public:
+    explicit ConstBufferEntry(const VideoCommon::Shader::ConstBuffer& entry,
+                              Maxwell::ShaderStage stage, const std::string& name, u32 index)
+        : VideoCommon::Shader::ConstBuffer{entry}, stage{stage}, name{name}, index{index} {}
+
+    const std::string& GetName() const {
+        return name;
+    }
+
+    Maxwell::ShaderStage GetStage() const {
+        return stage;
+    }
+
+    u32 GetIndex() const {
+        return index;
+    }
+
+    u32 GetHash() const {
+        return (static_cast<u32>(stage) << 16) | index;
+    }
+
+private:
+    std::string name;
+    Maxwell::ShaderStage stage{};
+    u32 index{};
+};
+
+class SamplerEntry : public VideoCommon::Shader::Sampler {
+public:
+    explicit SamplerEntry(const VideoCommon::Shader::Sampler& entry, Maxwell::ShaderStage stage,
+                          const std::string& name)
+        : VideoCommon::Shader::Sampler{entry}, stage{stage}, name{name} {}
+
+    const std::string& GetName() const {
+        return name;
+    }
+
+    Maxwell::ShaderStage GetStage() const {
+        return stage;
+    }
+
+    u32 GetHash() const {
+        return (static_cast<u32>(stage) << 16) | GetIndex();
+    }
+
+private:
+    std::string name;
+    Maxwell::ShaderStage stage{};
+};
+
+struct ShaderEntries {
+    std::vector<ConstBufferEntry> const_buffers;
+    std::vector<SamplerEntry> samplers;
+    std::array<bool, Maxwell::NumClipDistances> clip_distances{};
+    std::size_t shader_length{};
+};
+
+using ProgramResult = std::pair<std::string, ShaderEntries>;
+
+std::string GetCommonDeclarations();
+
+ProgramResult Decompile(const VideoCommon::Shader::ShaderIR& ir, Maxwell::ShaderStage stage,
+                        const std::string& suffix);
+
+} // namespace OpenGL::GLShader