extract transparency fix from #8050
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@ -870,6 +870,14 @@ class OC_Image {
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imagedestroy($process);
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return false;
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}
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// preserve transparency
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if($this->imageType == IMAGETYPE_GIF or $this->imageType == IMAGETYPE_PNG) {
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imagecolortransparent($process, imagecolorallocatealpha($process, 0, 0, 0, 127));
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imagealphablending($process, false);
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imagesavealpha($process, true);
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}
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imagecopyresampled($process, $this->resource, 0, 0, $x, $y, $w, $h, $w, $h);
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if ($process == false) {
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OC_Log::write('core', __METHOD__.'(): Error resampling process image '.$w.'x'.$h, OC_Log::ERROR);
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