plugin.php
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<?php
class elFinderPluginAutoResize {
private $opts = array();
public function __construct($opts) {
$defaults = array(
'enable' => true, // For control by volume driver
'maxWidth' => 1024, // Path to Water mark image
'maxHeight' => 1024, // Margin right pixel
'quality' => 95, // JPEG image save quality
'targetType' => IMG_GIF|IMG_JPG|IMG_PNG|IMG_WBMP // Target image formats ( bit-field )
);
$this->opts = array_merge($defaults, $opts);
}
public function onUpLoadPreSave(&$path, &$name, $src, $elfinder, $volume) {
$opts = $this->opts;
$volOpts = $volume->getOptionsPlugin('AutoResize');
if (is_array($volOpts)) {
$opts = array_merge($this->opts, $volOpts);
}
if (! $opts['enable']) {
return false;
}
$srcImgInfo = @getimagesize($src);
if ($srcImgInfo === false) {
return false;
}
// check target image type
$imgTypes = array(
IMAGETYPE_GIF => IMG_GIF,
IMAGETYPE_JPEG => IMG_JPEG,
IMAGETYPE_PNG => IMG_PNG,
IMAGETYPE_WBMP => IMG_WBMP,
);
if (! ($opts['targetType'] & $imgTypes[$srcImgInfo[2]])) {
return false;
}
if ($srcImgInfo[0] > $opts['maxWidth'] || $srcImgInfo[1] > $opts['maxHeight']) {
return $this->resize($src, $srcImgInfo, $opts['maxWidth'], $opts['maxHeight'], $opts['quality']);
}
return false;
}
private function resize($src, $srcImgInfo, $maxWidth, $maxHeight, $quality) {
$zoom = min(($maxWidth/$srcImgInfo[0]),($maxHeight/$srcImgInfo[1]));
$width = round($srcImgInfo[0] * $zoom);
$height = round($srcImgInfo[1] * $zoom);
if (class_exists('Imagick')) {
return $this->resize_imagick($src, $width, $height, $quality);
} else {
return $this->resize_gd($src, $width, $height, $quality, $srcImgInfo);
}
}
private function resize_gd($src, $width, $height, $quality, $srcImgInfo) {
switch ($srcImgInfo['mime']) {
case 'image/gif':
if (@imagetypes() & IMG_GIF) {
$oSrcImg = @imagecreatefromgif($src);
} else {
$ermsg = 'GIF images are not supported';
}
break;
case 'image/jpeg':
if (@imagetypes() & IMG_JPG) {
$oSrcImg = @imagecreatefromjpeg($src) ;
} else {
$ermsg = 'JPEG images are not supported';
}
break;
case 'image/png':
if (@imagetypes() & IMG_PNG) {
$oSrcImg = @imagecreatefrompng($src) ;
} else {
$ermsg = 'PNG images are not supported';
}
break;
case 'image/wbmp':
if (@imagetypes() & IMG_WBMP) {
$oSrcImg = @imagecreatefromwbmp($src);
} else {
$ermsg = 'WBMP images are not supported';
}
break;
default:
$oSrcImg = false;
$ermsg = $srcImgInfo['mime'].' images are not supported';
break;
}
if ($oSrcImg && false != ($tmp = imagecreatetruecolor($width, $height))) {
if (!imagecopyresampled($tmp, $oSrcImg, 0, 0, 0, 0, $width, $height, $srcImgInfo[0], $srcImgInfo[1])) {
return false;
}
switch ($srcImgInfo['mime']) {
case 'image/gif':
imagegif($tmp, $src);
break;
case 'image/jpeg':
imagejpeg($tmp, $src, $quality);
break;
case 'image/png':
if (function_exists('imagesavealpha') && function_exists('imagealphablending')) {
imagealphablending($tmp, false);
imagesavealpha($tmp, true);
}
imagepng($tmp, $src);
break;
case 'image/wbmp':
imagewbmp($tmp, $src);
break;
}
imagedestroy($oSrcImg);
imagedestroy($tmp);
return true;
}
return false;
}
private function resize_imagick($src, $width, $height, $quality) {
try {
$img = new imagick($src);
if (strtoupper($img->getImageFormat()) === 'JPEG') {
$img->setImageCompression(imagick::COMPRESSION_JPEG);
$img->setCompressionQuality($quality);
}
$img->resizeImage($width, $height, Imagick::FILTER_LANCZOS, true);
$result = $img->writeImage($src);
$img->clear();
$img->destroy();
return $result ? true : false;
} catch (Exception $e) {
return false;
}
}
}