From 16a5f15f85cabfaa0c0fc66151e850119b64e64b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rn=20Friedrich=20Dreyer?= <jfd@butonic.de>
Date: Fri, 22 Feb 2013 12:42:40 +0100
Subject: [PATCH] keep transparency when resizing or cropping png/gif
---
lib/image.php | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/lib/image.php b/lib/image.php
index 7b0cbefd65..dc1c6df85a 100644
--- a/lib/image.php
+++ b/lib/image.php
@@ -702,6 +702,13 @@ class OC_Image {
return false;
}
+ // preserve transparency
+ if($this->imagetype == IMAGETYPE_GIF or $this->imagetype == IMAGETYPE_PNG) {
+ imagecolortransparent($process, imagecolorallocatealpha($process, 0, 0, 0, 127));
+ imagealphablending($process, false);
+ imagesavealpha($process, true);
+ }
+
imagecopyresampled($process, $this->resource, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);
if ($process == false) {
OC_Log::write('core', __METHOD__.'(): Error resampling process image '.$width.'x'.$height, OC_Log::ERROR);
@@ -751,6 +758,14 @@ class OC_Image {
imagedestroy($process);
return false;
}
+
+ // preserve transparency
+ if($this->imagetype == IMAGETYPE_GIF or $this->imagetype == IMAGETYPE_PNG) {
+ imagecolortransparent($process, imagecolorallocatealpha($process, 0, 0, 0, 127));
+ imagealphablending($process, false);
+ imagesavealpha($process, true);
+ }
+
imagecopyresampled($process, $this->resource, 0, 0, $x, $y, $targetWidth, $targetHeight, $width, $height);
if ($process == false) {
OC_Log::write('core',
--
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