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alpha on thumbs (by pierovdfn)

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This commit is contained in:
real_nowhereman 2011-08-25 09:59:24 +00:00
parent c0585e3a28
commit 5fac9b6a39
1 changed files with 26 additions and 16 deletions
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42
fp-plugins/thumb/plugin.thumb.php
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@ -56,21 +56,8 @@ function plugin_thumb_create($fpath, $infos, $new_width, $new_height) {
$thumbname = basename($fpath);
$thumbdir = dirname($fpath) . '/' . THUMB_DIR ;
@fs_mkdir($thumbdir);
$thumbpath = $thumbdir .'/'. $thumbname;
/*
$new_width = (int)($infos[0] * $scalefact);
$new_height = (int)($infos[1] * $scalefact);
*/
if (file_exists($thumbpath)) {
$oldthumbinfo = getimagesize($thumbpath);
@ -80,6 +67,9 @@ function plugin_thumb_create($fpath, $infos, $new_width, $new_height) {
}
}
@fs_mkdir($thumbdir);
// we support only jpeg's, png's and gif's
switch($infos[2]) {
@ -97,10 +87,30 @@ function plugin_thumb_create($fpath, $infos, $new_width, $new_height) {
$scaled = imagecreatetruecolor($new_width, $new_height);
imagecopyresampled($scaled, $image, 0, 0, 0, 0, $new_width, $new_height, $infos[0], $infos[1]);
/*
* If gif or png preserve the alpha channel
*
* Added by Piero VDFN
* Kudos to http://www.php.net/manual/en/function.imagecopyresampled.php#104028
*/
if($infos[2]==1 || $infos[2]==3) {
imagecolortransparent($scaled, imagecolorallocatealpha($scaled, 0, 0, 0, 127));
imagealphablending($scaled, false);
imagesavealpha($scaled, true);
$output=$infos[2]==3 ? 'png' : 'gif';
} else {
$output='jpg';
}
if($output=='png') {
imagepng($scaled, $thumbpath);
} elseif($output=='gif') {
imagegif($scaled, $thumbpath);
} else {
imagejpeg($scaled, $thumbpath);
}
imagejpeg($scaled, $thumbpath);
@chmod($thumbpath, FILE_PERMISSIONS);
return array($thumbpath, $new_width, $new_height);
}