For png images with transparency, the imagesaveaplpha() needs to be s…

…et to true on the source image in order for the alpha to be preserved when using the modifier methods.
silverstripe · Apr 6, 2012 · 797d526 · 797d526
1 parent aebbb10
commit 797d526
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/filesystem/GD.php b/filesystem/GD.php
@@ -30,7 +30,12 @@ function __construct($filename = null) {
 			switch($type) {
 				case 1: if(function_exists('imagecreatefromgif')) $this->setGD(imagecreatefromgif($filename)); break;
 				case 2: if(function_exists('imagecreatefromjpeg')) $this->setGD(imagecreatefromjpeg($filename)); break;
-				case 3: if(function_exists('imagecreatefrompng')) $this->setGD(imagecreatefrompng($filename)); break;
+				case 3: if(function_exists('imagecreatefrompng')) {
+					$img = imagecreatefrompng($filename);
+					imagesavealpha($img, true); // save alphablending setting (important)
+					$this->setGD($img);
+					break;
+				}
 			}
 		}