Mesa (master): progs/demos: check for GL_ARB_imaging if convolutions is requested

[Brian Paul]

Module: Mesa
Branch: master
Commit: babd71ba45cbb14d5747d5783e21bc9eb692df8e
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=babd71ba45cbb14d5747d5783e21bc9eb692df8e

Author: Brian Paul <brianp at vmware.com>
Date:   Mon May  3 15:29:02 2010 -0600

progs/demos: check for GL_ARB_imaging if convolutions is requested

---

 progs/demos/gloss.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/progs/demos/gloss.c b/progs/demos/gloss.c
index 450861e..ddfd548 100644
--- a/progs/demos/gloss.c
+++ b/progs/demos/gloss.c
@@ -282,6 +282,13 @@ static void Init( int argc, char *argv[] )
       }
    }
 
+   if (convolve && !glutExtensionSupported("GL_ARB_imaging")) {
+      fprintf(stderr,
+              "GL_ARB_imaging is not supported, disabling convolution.\n");
+      exit(1);
+   }
+
+
    if (fullscreen)
       glutFullScreen();