Changeset 4680 for ImageMagick/trunk/coders/png.c

Timestamp:

06/30/11 22:52:59 (2 years ago)

Author:

glennrp

Message:

Avoid using Z_RLE and Z_FIXED with old zlib versions that don't support them.

File:

• ImageMagick/trunk/coders/png.c (modified) (1 diff)

ImageMagick/trunk/coders/png.c

@@ -11054 +11054 @@
 
       else if (LocaleCompare(value,"3") == 0)
+#ifdef Z_RLE  /* Z_RLE was added to zlib-1.2.0 */
         mng_info->write_png_compression_strategy = Z_RLE+1;
+#else
+        mng_info->write_png_compression_strategy = Z_DEFAULT_STRATEGY+1;
+#endif
 
       else if (LocaleCompare(value,"4") == 0)
+#ifdef Z_FIXED  /* Z_FIXED was added to zlib-1.2.2.2 */
         mng_info->write_png_compression_strategy = Z_FIXED+1;
+#else
+        mng_info->write_png_compression_strategy = Z_DEFAULT_STRATEGY+1;
+#endif
 
       else