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<?php
namespace Intervention\Image\Gd\Commands;
use Intervention\Image\Commands\AbstractCommand;
class ResizeCommand extends AbstractCommand
{
/**
* Resizes image dimensions
*
* @param \Intervention\Image\Image $image
* @return boolean
*/
public function execute($image)
{
$width = $this->argument(0)->value();
$height = $this->argument(1)->value();
$constraints = $this->argument(2)->type('closure')->value();
// resize box
$resized = $image->getSize()->resize($width, $height, $constraints);
// modify image
$this->modify($image, 0, 0, 0, 0, $resized->getWidth(), $resized->getHeight(), $image->getWidth(), $image->getHeight());
return true;
}
/**
* Wrapper function for 'imagecopyresampled'
*
* @param Image $image
* @param int $dst_x
* @param int $dst_y
* @param int $src_x
* @param int $src_y
* @param int $dst_w
* @param int $dst_h
* @param int $src_w
* @param int $src_h
* @return boolean
*/
protected function modify($image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h)
{
// create new image
$modified = imagecreatetruecolor($dst_w, $dst_h);
// get current image
$resource = $image->getCore();
// preserve transparency
$transIndex = imagecolortransparent($resource);
if ($transIndex != -1) {
$rgba = imagecolorsforindex($modified, $transIndex);
$transColor = imagecolorallocatealpha($modified, $rgba['red'], $rgba['green'], $rgba['blue'], 127);
imagefill($modified, 0, 0, $transColor);
imagecolortransparent($modified, $transColor);
} else {
imagealphablending($modified, false);
imagesavealpha($modified, true);
}
// copy content from resource
$result = imagecopyresampled(
$modified,
$resource,
$dst_x,
$dst_y,
$src_x,
$src_y,
$dst_w,
$dst_h,
$src_w,
$src_h
);
// set new content as recource
$image->setCore($modified);
return $result;
}
}