Date: Wed, 23 May 2007 00:39:47 +0300

From: "Eyal Lotem"
To: "SDL Mailing List" <sdl@lists.libsdl.org>
Subject: [SDL] Bug in GL_SWAP_CONTROL extension name.

The checked extension name is incorrect.
The attached patch fixes it to the correct name.

I don't think that under any setup, this extension name was ever
correct, which is why its not OR'd against the old check.

This fixes the "tear effect" (vsync problems) I had here with nVidia
GLX drivers.

Eyal

src/video/x11/SDL_x11opengl.c

@@ -224,7 +224,7 @@ X11_GL_InitExtensions(_THIS)
     }
 
     /* Check for SGI_swap_control */
-    if (HasExtension("SGI_swap_control", extensions)) {
+    if (HasExtension("GLX_SGI_swap_control", extensions)) {
         _this->gl_data->glXSwapIntervalSGI =
             (int (*)(int)) X11_GL_GetProcAddress(_this, "glXSwapIntervalSGI");
     }