From 61b4c957269727a0a2526edc2331881da8346100 Mon Sep 17 00:00:00 2001
From: glennrp <glennrp@git.imagemagick.org>
Date: Tue, 10 Nov 2009 20:40:41 +0000
Subject: [PATCH] Warn about using old libpng-1.4.0 beta versions.

---
 ChangeLog    |  3 ++-
 coders/png.c | 12 ++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 5a4a97446..3724fded5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,6 @@
 2009-11-09  6.5.7-7 Glenn Randers-Pehrson <glennrp@image...>
-  * Suppress libpng pedantic warnings.
+  * Suppress libpng pedantic warnings and warn about using old libpng-1.4.0
+    beta versions.
 
 2009-11-09  6.5.7-7 Cristy  <quetzlzacatenango@image...>
   * Bump library age.
diff --git a/coders/png.c b/coders/png.c
index f0c1e1a47..573619519 100644
--- a/coders/png.c
+++ b/coders/png.c
@@ -1734,6 +1734,18 @@ static Image *ReadOnePNGImage(MngInfo *mng_info,
        PNG_LIBPNG_VER_STRING);
 #endif
 
+#if (PNG_LIBPNG_VER >= 10400)
+#  ifndef  PNG_TRANSFORM_GRAY_TO_RGB    /* Added at libpng-1.4.0beta67 */
+  if (image_info->verbose)
+    {
+      printf("Your PNG library (libpng-%s) is an old beta version.\n",
+           PNG_LIBPNG_VER_STRING);
+      printf("Please update it.\n");
+    }
+#  endif
+#endif
+
+
   quantum_info = (QuantumInfo *) NULL;
   image=mng_info->image;
 
-- 
2.40.0