Mesa (mesa_7_6_branch): progs/trivial: check if GL_ARB_occlusion_query is supported

[Brian Paul]

Module: Mesa
Branch: mesa_7_6_branch
Commit: 5283a3fb25b2667501eb782fb461c981200a65ef
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=5283a3fb25b2667501eb782fb461c981200a65ef

Author: Brian Paul <brianp at vmware.com>
Date:   Tue Oct 20 16:22:03 2009 -0600

progs/trivial: check if GL_ARB_occlusion_query is supported

---

 progs/trivial/tri-query.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/progs/trivial/tri-query.c b/progs/trivial/tri-query.c
index 85e39df..94956a8 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));