progs/trivial: check if GL_ARB_occlusion_query is supported

2009-10-20 16:22:03 -06:00
parent 4b2cf92ad9
commit 5283a3fb25
1 changed files with 5 additions and 0 deletions
@@ -39,6 +39,11 @@ GLenum doubleBuffer;

 static void Init(void)
 {
+   if (!glutExtensionSupported("GL_ARB_occlusion_query")) {
+      fprintf(stderr, "Sorry, this program requires GL_ARB_occlusion_query\n");
+      exit(1);
+   }
+
   fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
   fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
   fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));