Changeset 6439 for trunk/wp-admin/includes/image.php

Timestamp:

12/20/2007 10:24:39 PM (17 years ago)

Author:

westi

Message:

Preserve PNG transparency/alpha during thumbnail creation. Fixes #2805 props Libertus/Otto42.

File:

• trunk/wp-admin/includes/image.php (modified) (1 diff)

trunk/wp-admin/includes/image.php

@@ -34 +34 @@
 
     $thumbnail = imagecreatetruecolor( $image_new_width, $image_new_height);
+
+    // preserve PNG transparency
+    if( IMAGETYPE_PNG == $sourceImageType && function_exists( 'imagealphablending' ) && function_exists( 'imagesavealpha' )) {
+        imagealphablending($thumbnail, false);
+        imagesavealpha($thumbnail,true);
+    }   
+    
     @ imagecopyresampled( $thumbnail, $image, 0, 0, 0, 0, $image_new_width, $image_new_height, $sourceImageWidth, $sourceImageHeight );