/******************************************************************************
 * SAGE - Scalable Adaptive Graphics Environment
 *
 * Module: appleMultiContext.h
 * Author : Luc Renambot, Byungil Jeong
 *
 *   Description:   This is the header file for the video display module of SAGE. 
 *
 *   Notes   :    Since the display window may receive its many pieces from many servers, we need to pass multiple buffers
 *         to this class. Each of the buffers passed contains a frame which forms a part (or whole) of the image on
 *         the display side.
 *
 * Copyright (C) 2007 Electronic Visualization Laboratory,
 * University of Illinois at Chicago
 *
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above
 *    copyright notice, this list of conditions and the following disclaimer
 *    in the documentation and/or other materials provided with the distribution.
 *  * Neither the name of the University of Illinois at Chicago nor
 *    the names of its contributors may be used to endorse or promote
 *    products derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Direct questions, comments etc about SAGE to sage_users@listserv.uic.edu or 
 * http://www.evl.uic.edu/cavern/forum/
 *         
***************************************************************************************************************************/

#ifndef APPLE_MULTI_CONTEXT_H
#define APPLE_MULTI_CONTEXT_H

#if defined(__APPLE__)

#include <ApplicationServices/ApplicationServices.h>
#include <OpenGL/gl.h>   // Header File For The OpenGL Library
#include <OpenGL/glu.h>   // Header File For The GLu Library
#include <OpenGL/OpenGL.h>
#include <AGL/agl.h>

#include "displayContext.h"

///////////////////////////
// Define a playback window
class Window {

public:

   Window(const Rect & rect, int fulls);

   ~Window() {
      aglDestroyContext(m_ctx);
      DisposeWindow(m_win);
   }

   void clear() {
      aglSetCurrentContext(m_ctx);

      glClearColor(0,0,0,1);
      glClear(GL_COLOR_BUFFER_BIT);

      glFlush();

      aglSwapBuffers(m_ctx);
   }

   void clearOpenGLData() {
      m_init = false;
   }

   WindowRef theWindow() {
      return m_win;
   }

   void beginGL() {
      aglSetCurrentContext(m_ctx);
      glClear(GL_COLOR_BUFFER_BIT);
   }

   void endGL() {
      glFlush();
      aglSwapBuffers(m_ctx);
   }
  
   void contextSwitching() {
      aglSetCurrentContext(m_ctx);
   }

protected:

   // Carbon API window reference:
   WindowRef m_win;

   // Window geometry:
   Rect m_rect;

   // OpenGL context:
   AGLContext m_ctx;

   // OpenGL data:
   bool m_init;
};

class appleMultiContext : public displayContext {
protected:
   Window *windows[MAX_TILES_PER_NODE];
   
public:
   int init(struct sageDisplayConfig &cfg);   
   void clearScreen() {}
   void setupViewport(int i, sageRect &tileRect);
   void refreshTile(int i) { windows[i]->endGL(); }
   void refreshScreen() {}
   void changeBackground(int red, int green, int blue);
   void switchContext(int i) { windows[i]->contextSwitching(); }
   void checkEvent();
};

#endif

#endif