From 4bdb46e4c2bbdbb4f0a8480a74ee9887fa1995df Mon Sep 17 00:00:00 2001
From: bunnei <bunneidev@gmail.com>
Date: Mon, 19 Mar 2018 18:51:43 -0400
Subject: [PATCH] renderer_gl: Port over gl_shader_decompiler module from
 Citra.

---
 src/video_core/CMakeLists.txt                 |  2 +
 .../renderer_opengl/gl_shader_decompiler.cpp  | 58 +++++++++++++++++++
 .../renderer_opengl/gl_shader_decompiler.h    | 27 +++++++++
 3 files changed, 87 insertions(+)
 create mode 100644 src/video_core/renderer_opengl/gl_shader_decompiler.cpp
 create mode 100644 src/video_core/renderer_opengl/gl_shader_decompiler.h

diff --git a/src/video_core/CMakeLists.txt b/src/video_core/CMakeLists.txt
index 92951a7e1e..cce29231f6 100644
--- a/src/video_core/CMakeLists.txt
+++ b/src/video_core/CMakeLists.txt
@@ -16,6 +16,8 @@ add_library(video_core STATIC
     renderer_opengl/gl_rasterizer_cache.cpp
     renderer_opengl/gl_rasterizer_cache.h
     renderer_opengl/gl_resource_manager.h
+    renderer_opengl/gl_shader_decompiler.cpp
+    renderer_opengl/gl_shader_decompiler.h
     renderer_opengl/gl_shader_util.cpp
     renderer_opengl/gl_shader_util.h
     renderer_opengl/gl_state.cpp
diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
new file mode 100644
index 0000000000..0e0ef18cce
--- /dev/null
+++ b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
@@ -0,0 +1,58 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <string>
+#include <queue>
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/renderer_opengl/gl_shader_decompiler.h"
+
+namespace Maxwell3D {
+namespace Shader {
+namespace Decompiler {
+
+constexpr u32 PROGRAM_END = MAX_PROGRAM_CODE_LENGTH;
+
+class Impl {
+public:
+    Impl(const std::array<u32, MAX_PROGRAM_CODE_LENGTH>& program_code,
+         const std::array<u32, MAX_SWIZZLE_DATA_LENGTH>& swizzle_data, u32 main_offset,
+         const std::function<std::string(u32)>& inputreg_getter,
+         const std::function<std::string(u32)>& outputreg_getter, bool sanitize_mul,
+         const std::string& emit_cb, const std::string& setemit_cb)
+        : program_code(program_code), swizzle_data(swizzle_data), main_offset(main_offset),
+          inputreg_getter(inputreg_getter), outputreg_getter(outputreg_getter),
+          sanitize_mul(sanitize_mul), emit_cb(emit_cb), setemit_cb(setemit_cb) {}
+
+    std::string Decompile() {
+        UNIMPLEMENTED();
+        return {};
+    }
+
+private:
+    const std::array<u32, MAX_PROGRAM_CODE_LENGTH>& program_code;
+    const std::array<u32, MAX_SWIZZLE_DATA_LENGTH>& swizzle_data;
+    u32 main_offset;
+    const std::function<std::string(u32)>& inputreg_getter;
+    const std::function<std::string(u32)>& outputreg_getter;
+    bool sanitize_mul;
+    const std::string& emit_cb;
+    const std::string& setemit_cb;
+};
+
+std::string DecompileProgram(const std::array<u32, MAX_PROGRAM_CODE_LENGTH>& program_code,
+                             const std::array<u32, MAX_SWIZZLE_DATA_LENGTH>& swizzle_data,
+                             u32 main_offset,
+                             const std::function<std::string(u32)>& inputreg_getter,
+                             const std::function<std::string(u32)>& outputreg_getter,
+                             bool sanitize_mul, const std::string& emit_cb,
+                             const std::string& setemit_cb) {
+    Impl impl(program_code, swizzle_data, main_offset, inputreg_getter, outputreg_getter,
+              sanitize_mul, emit_cb, setemit_cb);
+    return impl.Decompile();
+}
+
+} // namespace Decompiler
+} // namespace Shader
+} // namespace Maxwell3D
diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.h b/src/video_core/renderer_opengl/gl_shader_decompiler.h
new file mode 100644
index 0000000000..02ebfcbe8a
--- /dev/null
+++ b/src/video_core/renderer_opengl/gl_shader_decompiler.h
@@ -0,0 +1,27 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <array>
+#include <functional>
+#include <string>
+#include "common/common_types.h"
+
+namespace Maxwell3D {
+namespace Shader {
+namespace Decompiler {
+
+constexpr size_t MAX_PROGRAM_CODE_LENGTH{0x100000};
+constexpr size_t MAX_SWIZZLE_DATA_LENGTH{0x100000};
+
+std::string DecompileProgram(const std::array<u32, MAX_PROGRAM_CODE_LENGTH>& program_code,
+                             const std::array<u32, MAX_SWIZZLE_DATA_LENGTH>& swizzle_data,
+                             u32 main_offset,
+                             const std::function<std::string(u32)>& inputreg_getter,
+                             const std::function<std::string(u32)>& outputreg_getter,
+                             bool sanitize_mul, const std::string& emit_cb = "",
+                             const std::string& setemit_cb = "");
+
+} // namespace Decompiler
+} // namespace Shader
+} // namespace Maxwell3D