diff --git a/src/common/src/common_types.h b/src/common/src/common_types.h
index cbe556c7e..68f237385 100644
--- a/src/common/src/common_types.h
+++ b/src/common/src/common_types.h
@@ -1,50 +1,122 @@
-// Copyright 2013 Dolphin Emulator Project
-// Licensed under GPLv2
-// Refer to the license.txt file included.
+/**
+ * Copyright (C) 2005-2012 Gekko Emulator
+ *
+ * @file    common_types.h
+ * @author  ShizZy <shizzy247@gmail.com>
+ * @date    2012-02-11
+ * @brief   Common types used throughout the project
+ *
+ * @section LICENSE
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details at
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * Official project repository can be found at:
+ * http://code.google.com/p/gekko-gc-emu/
+ */
 
-
-// This header contains type definitions that are shared between the Dolphin core and
-// other parts of the code. Any definitions that are only used by the core should be
-// placed in "common.h" instead.
-
-#ifndef _COMMONTYPES_H_
-#define _COMMONTYPES_H_
+#pragma once 
 
 #ifdef _WIN32
 
 #include <tchar.h>
 
-typedef unsigned __int8 u8;
-typedef unsigned __int16 u16;
-typedef unsigned __int32 u32;
-typedef unsigned __int64 u64;
+typedef unsigned __int8     u8;     ///< 8-bit unsigned byte
+typedef unsigned __int16    u16;    ///< 16-bit unsigned short
+typedef unsigned __int32    u32;    ///< 32-bit unsigned word
+typedef unsigned __int64    u64;    ///< 64-bit unsigned int
 
-typedef signed __int8 s8;
-typedef signed __int16 s16;
-typedef signed __int32 s32;
-typedef signed __int64 s64;
+typedef signed __int8       s8;     ///< 8-bit signed byte
+typedef signed __int16      s16;    ///< 16-bit signed short
+typedef signed __int32      s32;    ///< 32-bit signed word
+typedef signed __int64      s64;    ///< 64-bit signed int
 
 #else
 
-#ifndef GEKKO
+typedef unsigned char       u8;     ///< 8-bit unsigned byte
+typedef unsigned short      u16;    ///< 16-bit unsigned short
+typedef unsigned int        u32;    ///< 32-bit unsigned word
+typedef unsigned long long  u64;    ///< 64-bit unsigned int
 
-typedef unsigned char u8;
-typedef unsigned short u16;
-typedef unsigned int u32;
-typedef unsigned long long u64;
+typedef signed char         s8;     ///< 8-bit signed byte
+typedef signed short        s16;    ///< 16-bit signed short
+typedef signed int          s32;    ///< 32-bit signed word
+typedef signed long long    s64;    ///< 64-bit signed int
 
-typedef signed char s8;
-typedef signed short s16;
-typedef signed int s32;
-typedef signed long long s64;
-
-#endif
 // For using windows lock code
 #define TCHAR char
 #define LONG int
 
 #endif // _WIN32
 
+typedef float   f32;    ///< 32-bit floating point
+typedef double  f64;    ///< 64-bit floating point
+
 #include "swap.h"
 
-#endif // _COMMONTYPES_H_
+/// Union for fast 16-bit type casting
+union t16 {
+	u8	_u8[2];             ///< 8-bit unsigned char(s)
+	u16 _u16;               ///< 16-bit unsigned shorts(s)
+};
+
+/// Union for fast 32-bit type casting
+union t32 {
+    f32 _f32;               ///< 32-bit floating point(s)
+    u32 _u32;               ///< 32-bit unsigned int(s)
+    s32 _s32;               ///< 32-bit signed int(s)
+    u16 _u16[2];            ///< 16-bit unsigned shorts(s)
+    u8  _u8[4];             ///< 8-bit unsigned char(s)
+};
+
+/// Union for fast 64-bit type casting
+union t64 {
+    f64 _f64;               ///< 64-bit floating point
+    u64 _u64;               ///< 64-bit unsigned long
+    f32 _f32[2];            ///< 32-bit floating point(s)
+    u32 _u32[2];            ///< 32-bit unsigned int(s)
+    s32 _s32[2];            ///< 32-bit signed int(s)
+    u16 _u16[4];            ///< 16-bit unsigned shorts(s)
+    u8  _u8[8];             ///< 8-bit unsigned char(s)
+};
+
+/// Union for fast 128-bit type casting
+union t128 {
+    struct
+    {
+        t64 ps0;            ///< 64-bit paired single 0
+        t64 ps1;            ///< 64-bit paired single 1
+    };
+    __m128  a;              ///< 128-bit floating point (__m128 maps to the XMM[0-7] registers)
+};
+
+/// Rectangle data structure
+class Rect {
+public:
+    Rect(int x0=0, int y0=0, int x1=0, int y1=0) {
+        x0_ = x0;
+        y0_ = y0;
+        x1_ = x1;
+        y1_ = y1;
+    }
+    ~Rect() { }
+
+    int x0_;    ///< Rect top left X-coordinate
+    int y0_;    ///< Rect top left Y-coordinate
+    int x1_;    ///< Rect bottom left X-coordinate
+    int y1_;    ///< Rect bottom right Y-coordinate
+
+    inline u32 width() const { return abs(x1_ - x0_); }
+    inline u32 height() const { return abs(y1_ - y0_); }
+
+    inline bool operator == (const Rect& val) const {
+        return (x0_ == val.x0_ && y0_ == val.y0_ && x1_ == val.x1_ && y1_ == val.y1_);
+    }
+};