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diff --git a/source/mupen64plus-video-arachnoid/src/OpenGLManager.h b/source/mupen64plus-video-arachnoid/src/OpenGLManager.h
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+/******************************************************************************
+ * Arachnoid Graphics Plugin for Mupen64Plus
+ * http://bitbucket.org/wahrhaft/mupen64plus-video-arachnoid/
+ *
+ * Copyright (C) 2009 Jon Ring
+ * Copyright (C) 2007 Kristofer Karlsson, Rickard Niklasson
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *****************************************************************************/
+
+#ifndef OPEN_GL_Manager_H_
+#define OPEN_GL_Manager_H_
+
+//OpenGL includes
+#include "m64p.h"
+#include "OpenGL.h"
+
+//*****************************************************************************
+//* OpenGL Manager Class                                                        
+//! Singelton class for initializing OpenGL and contolling OpenGL states. 
+//*****************************************************************************
+class OpenGLManager
+{
+public: 
+
+    //Destructor
+    ~OpenGLManager();
+
+    //Singleton Instance
+    static OpenGLManager& getSingleton()
+    {
+        static OpenGLManager instance;
+        return instance;
+    }
+
+    //Functions
+    bool initialize(bool fullscreen, int width, int height, int bitDepth, int refreshRate, bool vSync, bool hideCursor);
+    void dispose();
+    void resize(int width, int height, int bitDepth, int refreshRate);
+    bool toggleFullscreen();
+    void beginRendering();
+    void endRendering();
+
+    //Fog
+    void setFogEnabled(bool fog);    
+    bool getFogEnabled();
+
+    //Light
+    void setLighting(bool lighting);
+    bool getLightingEnabled();
+
+    //Textureing
+    void setTextureing2D(bool textureing);
+    bool getTextureing2DEnabled();
+
+    //Depth Testing
+    void setZBufferEnabled(bool enable);
+    bool getZBufferEnabled();    
+
+    //Alpha Test
+    void setAlphaTest(bool alphaTestEnable);
+    bool getAlphaTestEnabled();
+
+    //Wireframe
+    void setWireFrame(bool wireframe);    
+
+    //Culling
+    void setCullMode(bool cullFront, bool cullBack);
+    void setForceDisableCulling(bool force) { m_forceDisableCulling = force; }
+         
+    //Set Viewport
+    void setViewport(int x, int y, int width, int height, float zNear=0.0f, float zFar=1.0f);
+
+    //Set Scissor
+    void setScissorEnabled(bool enable);
+    bool getScissorEnabled();    
+    void setScissor(int x, int y, int width, int height);
+ 
+    //! Sets the backround color of OpenGL viewport 
+    void setClearColor(float r, float g, float b) { glClearColor(r, g, b, 1.0f); }
+
+    //Set callback from the M64P core
+    void setRenderingCallback(void(*callback)(int)) { m_renderingCallback = callback; }
+	
+	//Set draw flag for rendering callback
+	void setDrawFlag() { m_drawFlag = 1; }
+
+public:
+
+    //N64 Specifics
+    void calcViewScale(int viWidth, int viHeight);
+    float getViewScaleX() { return m_scaleX; } 
+    float getViewScaleY() { return m_scaleY; }
+
+public:
+
+    //Gets
+
+    int getWidth() { return m_width; }
+    int getHeight() { return m_height; }
+    bool getFullscreen() { return m_fullscreen; }
+
+private:
+
+     //Constructor
+    OpenGLManager();          
+
+private:
+
+    bool m_wireframe;            //!< Wireframe mode enabled?
+    bool m_lighting;             //!< Lighting enabled?
+    int m_width;                 //!< Display widht
+    int m_height;                //!< Display height
+    int m_bitDepth;              //!< Fullscreen bitdepth
+    int m_refreshRate;           //!< Fullscreen refresh rate 
+    float m_scaleX;              //!< DisplayWidth aka WindowWidth / viWidth (n64 specific)
+    float m_scaleY;              //!< DisplayHeight aka WindowHeight / viHeight (n64 specific)
+    bool m_fullscreen;           //!< Fullscreen mode or window mode?
+    bool m_forceDisableCulling;  //!< Culling cant be enabled if this is true
+    
+    void (*m_renderingCallback)(int);  //Rendering callback from the core
+	int m_drawFlag;
+};
+
+#endif