Do not allow AA if not trueColor (imageantialias does nothing)

diff --git a/ext/gd/libgd/gd.c b/ext/gd/libgd/gd.c
index 96684eab6c1b9bf2766aaefda66a24954beea8eb..3eeeba7fecd1f81e45f028782e82d49bbf042868 100644 (file)
--- a/ext/gd/libgd/gd.c
+++ b/ext/gd/libgd/gd.c
@@ -3189,7 +3189,9 @@ gdImageAlphaBlending (gdImagePtr im, int alphaBlendingArg)
 void
 gdImageAntialias (gdImagePtr im, int antialias)
 {
-       im->antialias = antialias;
+       if (im->trueColor){
+               im->antialias = antialias;
+       }
 }
 
 void