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keep transparency when resizing or cropping png/gif

This commit is contained in:
Jörn Friedrich Dreyer 2013-02-22 12:42:40 +01:00
parent 31d2b9bc07
commit 16a5f15f85
1 changed files with 15 additions and 0 deletions
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15
lib/image.php
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@ -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',