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GlPipe.h

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/*************** <auto-copyright.pl BEGIN do not edit this line> **************
 *
 * VR Juggler is (C) Copyright 1998-2003 by Iowa State University
 *
 * Original Authors:
 *   Allen Bierbaum, Christopher Just,
 *   Patrick Hartling, Kevin Meinert,
 *   Carolina Cruz-Neira, Albert Baker
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * -----------------------------------------------------------------
 * File:          $RCSfile: GlPipe.h,v $
 * Date modified: $Date: 2003/12/31 23:25:42 $
 * Version:       $Revision: 1.41 $
 * -----------------------------------------------------------------
 *
 *************** <auto-copyright.pl END do not edit this line> ***************/

#ifndef _VRJ_GL_PIPE_H_
#define _VRJ_GL_PIPE_H_

#include <vrj/vrjConfig.h>
#include <vector>

#include <vrj/Draw/OGL/GlWindow.h>
#include <vrj/Draw/OGL/GlDrawManager.h>
#include <vpr/Sync/CondVar.h>
#include <vpr/Sync/Semaphore.h>


namespace vrj
{
   class GlDrawManager;
class VJ_CLASS_API GlPipe
{
public:
   GlPipe(int num, GlDrawManager* glMgr)
      : mActiveThread(NULL)
      , mPipeNum(num)
      , controlExit(0)
      , glManager(glMgr)
      , renderTriggerSema(0)
      , renderCompleteSema(0)
      , swapTriggerSema(0)
      , swapCompleteSema(0)
   {
      mThreadRunning = false;
   }

   int start();

   void controlLoop(void* nullParam);

   void stop()
   { controlExit = 1; }     // Set the control loop exit flag

public:     // --------- Triggering functions ------ //
   void triggerRender();

   void completeRender();

   void triggerSwap();

   void completeSwap();

public: // --- Window Management ----- //

   void addWindow(GlWindow* win);

   void removeWindow(GlWindow* win);

   int hasWindows()
   {
      return ( (mNewWins.size() > 0) || (mOpenWins.size() > 0));
   }

   std::vector<GlWindow*> getOpenWindows()
   {
      return mOpenWins;
   }

private:
   void checkForNewWindows();

   void checkForWindowsToClose();

   void renderWindow(GlWindow* win);

   void swapWindowBuffers(GlWindow* win);

   void finishWindowSetup(GlWindow* win);

   GlPipe(const GlPipe& o) {;}
   void operator=(const GlPipe& o) {;}

private:
   vpr::Thread*   mActiveThread;    
   bool           mThreadRunning;   
   int   mPipeNum;                  
   std::vector<GlWindow*>  mNewWins;          
   vpr::Mutex              mNewWinLock;       
   std::vector<GlWindow*>  mOpenWins;         
   vpr::Mutex              mOpenWinLock;      
   std::vector<GlWindow*>  mClosingWins;     
   vpr::Mutex              mClosingWinLock;  
   int                     controlExit;         
   GlDrawManager*          glManager;    
   vpr::Semaphore    renderTriggerSema;  
   vpr::Semaphore    renderCompleteSema; 
   vpr::Semaphore    swapTriggerSema;    
   vpr::Semaphore    swapCompleteSema;   
};

}

#endif

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