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-rw-r--r--progs/demos/gloss.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/progs/demos/gloss.c b/progs/demos/gloss.c
index 450861e577..ddfd548b8b 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();