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-rw-r--r--progs/trivial/tri-query.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/progs/trivial/tri-query.c b/progs/trivial/tri-query.c
index 85e39df2df..94956a86f3 100644
--- 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));