fixed png reader bug :

fill alpha channel with 0xff on expansion
mapnik · Dec 1, 2006 · bbab2d9 · bbab2d9
1 parent f4786fe
commit bbab2d9
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/png_reader.cpp b/src/png_reader.cpp
@@ -189,8 +189,8 @@ namespace mapnik
             png_set_gray_to_rgb(png_ptr);
 
         // quick hack -- only work in >=libpng 1.2.7
-        png_set_add_alpha(png_ptr,1,1);
-
+        png_set_add_alpha(png_ptr,0xff,PNG_FILLER_AFTER); //rgba
+        
         double gamma;
         if (png_get_gAMA(png_ptr, info_ptr, &gamma))
             png_set_gamma(png_ptr, 2.2, gamma);