function Rotate::execute

File

core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Rotate.php, line 89

Class

Rotate

Defines GD2 rotate operation.

Namespace

Code

protected function execute(array $arguments) {
  // PHP installations using non-bundled GD do not have imagerotate.
  if (!function_exists('imagerotate')) {
    $this->logger
      ->notice('The image %file could not be rotated because the imagerotate() function is not available in this PHP installation.', [
      '%file' => $this->getToolkit()
        ->getSource(),
    ]);
    return FALSE;
  }
  // Stores the original GD resource.
  $original_res = $this->getToolkit()
    ->getResource();
  if ($new_res = imagerotate($this->getToolkit()
    ->getResource(), 360 - $arguments['degrees'], $arguments['background_idx'])) {
    $this->getToolkit()
      ->setResource($new_res);
    imagedestroy($original_res);
    // GIFs need to reassign the transparent color after performing the
    // rotate, but only do so, if the image already had transparency of its
    // own, or the rotate added a transparent background.
    if (!empty($arguments['gif_transparent_color'])) {
      $transparent_idx = imagecolorexactalpha($this->getToolkit()
        ->getResource(), $arguments['gif_transparent_color']['red'], $arguments['gif_transparent_color']['green'], $arguments['gif_transparent_color']['blue'], $arguments['gif_transparent_color']['alpha']);
      imagecolortransparent($this->getToolkit()
        ->getResource(), $transparent_idx);
    }
    return TRUE;
  }
  return FALSE;
}