gallium: only mark back color buffer surfaces as undefined after swapbuffers

[mesa.git] / progs / trivial / tri-tex-3d.c

diff --git a/progs/trivial/tri-tex-3d.c b/progs/trivial/tri-tex-3d.c
index 6a9d1d1bf6d4f17feeacd89c54be5387b81f3b5d..613803fd1b1920eaf5c13b5678ef3997d1dc8ba3 100644 (file)
--- a/progs/trivial/tri-tex-3d.c
+++ b/progs/trivial/tri-tex-3d.c
@@ -152,7 +152,7 @@ int main(int argc, char **argv)
 
     glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
 
-    type = GLUT_RGB;
+    type = GLUT_RGB | GLUT_ALPHA;
     type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
     glutInitDisplayMode(type);