only encode if image has dimensions (avoid abort in png writer on zer…

…o size width or height)
mapnik · Feb 10, 2012 · bfd7927 · bfd7927
1 parent a682212
commit bfd7927
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/image_util.cpp b/src/image_util.cpp
@@ -248,7 +248,7 @@ void save_to_stream(T const& image,
                     std::string const& type,
                     rgba_palette const& palette)
 {
-    if (stream)
+    if (stream && image.width() > 0 && image.height() > 0)
     {
         //all this should go into image_writer factory
         std::string t = boost::algorithm::to_lower_copy(type);
@@ -299,7 +299,7 @@ void save_to_stream(T const& image,
                     std::ostream & stream,
                     std::string const& type)
 {
-    if (stream)
+    if (stream && image.width() > 0 && image.height() > 0)
     {
         //all this should go into image_writer factory
         std::string t = boost::algorithm::to_lower_copy(type);