VRS - The Virtual Rendering System

version 3.3

vsyncgl.h

Go to the documentation of this file.

#ifndef VRS_OPENGL_VSYNCGL_H
#define VRS_OPENGL_VSYNCGL_H

#include <vrs/opengl/openglconfig.h>
#ifdef WIN32
#  include "../../../3rd-party/glew-1.5.1/include/GL/wglew.h"
#endif

namespace VRS
{

    // a class with static members that can be used to change and query the state of
    // vertical synchronization. vertical synchronization reduces the maximal framerate
    // to your display's refresh rate.
    class VSyncGL
    {

    public:
        static inline bool enabled()
        {
#ifdef WIN32
            bool hasExtension = wglewIsSupported("WGL_EXT_swap_control");
            VRS_Warning(hasExtension, "extension WGL_EXT_swap_control not supported");
            return (hasExtension ? wglGetSwapIntervalEXT() > 0 : true);
#else
            VRS_Warning(false, "VSyncGL is currently only supported on WIN32 plattforms.");
            return true;
#endif
        }


        static inline void setState(bool enabled)
        {
#ifdef WIN32
            bool hasExtension = wglewIsSupported("WGL_EXT_swap_control");
            VRS_Warning(hasExtension, "extension WGL_EXT_swap_control not supported");
            if (hasExtension)
            {
                // set interval to 1 -> enable. actually the parameter could be larger than 1.
                // this would reduce the max. framerate to (display's refresh rate / value).
                wglSwapIntervalEXT(enabled ? 1 : 0);
            }
#else
            VRS_Warning(false, "VSyncGL is currently only supported on WIN32 plattforms.");
#endif
        }

    };

} // namespace VRS

#endif // VRS_OPENGL_VSYNCGL_H

---

Generated on Thu May 24 06:00:16 2012 by Doxygen 1.5.6

© 2001-2010 Hasso-Plattner-Institut | Impressum | Contact