From: John Ellson <ellson@research.att.com>
Date: Mon, 24 Nov 2014 16:34:32 +0000 (-0500)
Subject: make gd always generate indexed color pngs, responding to #2502
X-Git-Tag: TRAVIS_CI_BUILD_EXPERIMENTAL~140
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=250243bba9a50675529b3414bfc767b011adb0dd;p=graphviz

make gd always generate indexed color pngs, responding to #2502
---

diff --git a/plugin/gd/gvdevice_gd.c b/plugin/gd/gvdevice_gd.c
index 3267ba16a..2c50d69e9 100644
--- a/plugin/gd/gvdevice_gd.c
+++ b/plugin/gd/gvdevice_gd.c
@@ -136,7 +136,7 @@ static void gd_format(GVJ_t * job)
 
 #ifdef HAVE_GD_PNG
     case FORMAT_PNG:
-	gdImageSaveAlpha(im, TRUE);
+        gdImageTrueColorToPalette(im, 0, 256);
 	gdImagePngCtx(im, &ctx);
         break;
 #endif