SettingsGL.cpp

// JW

#include "SettingsGL.hh"

#if defined(BIAS_HAVE_GLEW) && defined(WIN32)
// MS wgl extensions via GLEW
#  include <GL/wglew.h>
#  else
// Linux glx extensions via GLEW
//#include <GL/glxew.h>
#endif 

#include <Base/Debug/Error.hh>
#include <Base/Debug/DebugSimple.hh>


// ----------------------------------------------------------
// namespace stuff:
using namespace BIAS;
using namespace std;
// ----------------------------------------------------------

/** @author Jan Woetzel 04/2005 */


/** set the vsync swap interval */
void SettingsGL::SetVSyncInterval( const int & interval )
{
#if defined(WIN32) && defined(BIAS_HAVE_GLEW)
  if (WGLEW_EXT_swap_control) /* faster than wglewIsSupported(string) */
  {
    if (!wglSwapIntervalEXT(interval))
    {
      BIASERR("error on wglSwapIntervalEXT");
    }
    CHECK_GL_ERROR;
    return;
  } else {  
    BIASERR("WGLEW_EXT_swap_control not supported.");
  };
#else // WIN32 and glew
  BIASERR("Sorry, not implemented. Look at glXSwapInterval or AGL_SWAP_INTERVAL or enabled glew on win32 (JW)");
  // possibly glewXGetVideoSyncSGI ???
  //if (GLXEW_SGI_swap_control)
  //{
  //glXSwapIntervalSGI( interval);
  // //or: glXWaitVideoSyncSGI(1,0,&interval)
  //    //glXSwapInterval( interval );
  //    CHECK_GL_ERROR;
  //    return;
  //} else {    
  //    BIASERR("GLXEW_SGI_swap_control not supported.");
  //};
#endif // WIN32
}



/** returns the swap control interval JW */
int  SettingsGL::GetVSyncInterval()
{
  int interval = -2;
#if defined(WIN32) && defined(BIAS_HAVE_GLEW)
  if(wglewIsSupported("WGL_EXT_swap_control"))
  {
    interval = wglGetSwapIntervalEXT();
    CHECK_GL_ERROR;
  } else {
    BIASERR("WGLEW_EXT_swap_control not supported.");
  };
#else // WIN32 and glew
  BIASERR("Sorry, not implemented/tested. Enable glew on Window (JW)");
  //if (GLXEW_SGI_swap_control)
  //{
  //  interval=glXGetSwapIntervalSGI();
  //    CHECK_GL_ERROR;
  //} else {
  //    string msg("Error: GLXEW_SGI_swap_control not supported.");
  //    BIASERR(msg);
  //    ::wxMessageBox(msg.c_str());
  //};
#endif // WIN32
  return interval;
}