Ticket #13461: 13461.patch

wp-includes/media.php

@@ -419 +419 @@
                 return new WP_Error( 'error_getting_dimensions', __('Could not calculate resized image dimensions') );
         list($dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) = $dims;
 
-        $newimage = wp_imagecreatetruecolor( $dst_w, $dst_h );
+        if ( IMAGETYPE_GIF == $orig_type && function_exists('imagecolortransparent') ) {
+                $newimage = imagecreatetruecolor( $dst_w, $dst_h );
+                $transparent_id = imagecolortransparent($image);
+                if ( $transparent_id >= 0 ) {
+                        $transparent_color = imagecolorsforindex($image, $transparent_id);
+                        $transparent_id = imagecolorallocate($newimage, $transparent_color['red'], $transparent_color['green'], $transparent_color['blue']);
+                        imagefill($newimage, 0, 0, $transparent_id);
+                        imagecolortransparent($newimage, $transparent_id);
+                }
+        } else {
+                $newimage = wp_imagecreatetruecolor( $dst_w, $dst_h );
+        }
 
         imagecopyresampled( $newimage, $image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);