How to enable/force VSYNC ?

[Dylan]

Is there any code to enable vsync in openGL? The program has to start in vsync, platform independent.

If this is not possible (which I hope not) are there any other methods to force vsync?

[ZbuffeR]

It is possible, but the exact code depends on the windowing system or the lib used for it. Just like swapbuffers is not stricly opengl and depends on windowing system.

windows: wglSwapInterval(1);
SDL: search for SDL_GL_SWAP_CONTROL
linux: glXSwapInterval
etc...

[Dark Photon]

Dylan:
Is there any code to enable vsync in openGL? The program has to start in vsync, platform independent.

On Linux, __GL_SYNC_TO_VBLANK=1 in the environment will trigger this on NVidia. Can't speak for Windows.

[Rodrix]

For Windows this is the code you are probably
looking for!

HEADER FILE:
/*******************VSync*************************/
typedef BOOL (APIENTRY *PFNWGLSWAPINTERVALFARPROC)( int );
extern PFNWGLSWAPINTERVALFARPROC wglSwapIntervalEXT;
/**************************************************/


SOURCE FILE
static inline void init_EXT_Vsync()
{
wglSwapIntervalEXT = (PFNWGLSWAPINTERVALFARPROC)extgl_GetProcAddress( "wglSwapIntervalEXT" );
}


Cheers!
Rod

P.S: Don't forget to query if extension is supported by checking in GL Extensions string before calling init_EXT_Vsync().

Afterwards, wglSwapIntervalEXT(1) will turn Vsync on.
wglSwapIntervalEXT(0) will turn it off.

[Dylan]

Thank you all very much!