commit e19afb276edb1e1e54bd265c2d46edf4d00f9b69
author glennrp <glennrp@git.imagemagick.org> Fri Dec 03 14:57:40 2010 +0000
committer glennrp <glennrp@git.imagemagick.org> Fri Dec 03 14:57:40 2010 +0000
tree b3b4cee5e8a2117ea70e8886d0a8d0b69e34914d
parent 87bce0f17595ea5794431761b8aea5db9582501b

Don't SyncImage on entry to the PNG encoder if depth > 8 (lost transparency)

coders/png.c

diff --git a/coders/png.c b/coders/png.c
index 8ce7ebb..8dea40f 100644
--- a/coders/png.c
+++ b/coders/png.c
@@ -7296,7 +7296,7 @@
     Sometimes we get PseudoClass images whose RGB values don't match
     the colors in the colormap.  This code syncs the RGB values.
   */
-  if (image->taint && image->storage_class == PseudoClass)
+  if (image->depth <= 8 && image->taint && image->storage_class == PseudoClass)
      (void) SyncImage(image);
 
 #if (MAGICKCORE_QUANTUM_DEPTH > 16)