/**
* Transform the image using the defined options.
*
* @param \Transit\File $file
* @param array $options
* @return \Transit\File
* @throws \DomainException
*/
protected function _process(File $file, array $options)
{
if (!$file->isImage()) {
throw new DomainException(sprintf('%s is not a valid image', $file->basename()));
}
$sourcePath = $file->path();
$mimeType = $file->type();
// Create an image to work with
switch ($mimeType) {
case 'image/gif':
$sourceImage = imagecreatefromgif($sourcePath);
break;
case 'image/png':
$sourceImage = imagecreatefrompng($sourcePath);
break;
case 'image/jpg':
case 'image/jpeg':
case 'image/pjpeg':
$sourceImage = imagecreatefromjpeg($sourcePath);
break;
default:
throw new DomainException(sprintf('%s can not be transformed', $mimeType));
break;
}
// Gather options
$options = $options + array('dest_x' => 0, 'dest_y' => 0, 'dest_w' => null, 'dest_h' => null, 'source_x' => 0, 'source_y' => 0, 'source_w' => $file->width(), 'source_h' => $file->height(), 'quality' => 100, 'overwrite' => false, 'target' => '');
$targetImage = imagecreatetruecolor($options['dest_w'], $options['dest_h']);
// If gif/png allow transparencies
if ($mimeType === 'image/gif' || $mimeType === 'image/png') {
imagealphablending($targetImage, false);
imagesavealpha($targetImage, true);
imagefilledrectangle($targetImage, 0, 0, $options['dest_w'], $options['dest_h'], imagecolorallocatealpha($targetImage, 255, 255, 255, 127));
}
// Lets take our source and apply it to the temporary file and resize
imagecopyresampled($targetImage, $sourceImage, $options['dest_x'], $options['dest_y'], $options['source_x'], $options['source_y'], $options['dest_w'], $options['dest_h'], $options['source_w'], $options['source_h']);
// Now write the transformed image to the server
if ($options['overwrite']) {
$options['target'] = $file->name();
} else {
if (!$options['target']) {
$class = explode('\\', get_class($this));
$class = str_replace('transformer', '', strtolower(end($class)));
$options['target'] = sprintf('%s-%s-%sx%s', $file->name(), $class, round($options['dest_w']), round($options['dest_h']));
}
}
$targetPath = sprintf('%s%s.%s', $file->dir(), $options['target'], $file->ext());
switch ($mimeType) {
case 'image/gif':
imagegif($targetImage, $targetPath);
break;
case 'image/png':
imagepng($targetImage, $targetPath);
break;
case 'image/jpg':
case 'image/jpeg':
case 'image/pjpeg':
imagejpeg($targetImage, $targetPath, $options['quality']);
break;
}
// Clear memory
imagedestroy($sourceImage);
imagedestroy($targetImage);
return new File($targetPath);
}
