Hi, as I'm going to clean up vsync related stuff on the config-0-0-1-branch I read the code for dynamic glx extension registration in xc/lib/GL/dri/dri_glx.c and xc/lib/GL/glx/glxextensions.[ch]. I stumbled over this comment in front of __glXRegisterExtensions:
** In older versions of libGL (prior to October 2002) we _always_ ** called this function during libGL start-up. Now, we only call ** it from glXGetProcAddress() as a last resort. However, __glXRegisterExtensions is still called in driCreateDisplay. Hmm, on the other hand I found this comment in radeon_screen.c in front of __driRegisterExtensions: /* This function is called by libGL.so as soon as libGL.so is loaded. * This is where we'd register new extension functions with the dispatcher. Do the __driRegisterExtensions functions in the drivers rely on being called during initialisation? In fact I believe it could be dangerous if __driRegisterExtensions was called later as it may override extensions disabled in e.g. CreateContext due to lacking hardware support. Fortunately __glXRegisterExtensions returns immediately if it is called the second or later time. Maybe it's just a matter of updating a few comments after all. Regards, Felix ------------ __\|/__ ___ ___ ------------------------- Felix ___\_e -_/___/ __\___/ __\_____ You can do anything, Kühling (_____\Ä/____/ /_____/ /________) just not everything [EMAIL PROTECTED] \___/ \___/ U at the same time. ------------------------------------------------------- This SF.Net email sponsored by: Free pre-built ASP.NET sites including Data Reports, E-commerce, Portals, and Forums are available now. Download today and enter to win an XBOX or Visual Studio .NET. http://aspnet.click-url.com/go/psa00100003ave/direct;at.aspnet_072303_01/01 _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
