progs/trivial: Redraw upon keypress.

[mesa.git] / progs / trivial / tri-query.c

diff --git a/progs/trivial/tri-query.c b/progs/trivial/tri-query.c
index 85e39df2dfaf1d99adec63ba0c2401186af43f38..8898f182c78d623bdccdaf46a4d1baaa2285ed22 100644 (file)
--- a/progs/trivial/tri-query.c
+++ b/progs/trivial/tri-query.c
@@ -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));
@@ -67,7 +72,7 @@ static void Key(unsigned char key, int x, int y)
       case 27:
        exit(1);
       default:
-       return;
+       break;
     }
 
     glutPostRedisplay();