AdvanceResize.php in image effect 1.0.x

Namespace

Drupal\image_effect\Plugin\ImageToolkit\Operation\imagick

File

src/Plugin/ImageToolkit/Operation/imagick/AdvanceResize.php

<?php

namespace Drupal\image_effect\Plugin\ImageToolkit\Operation\imagick;

use Drupal\imagick\Plugin\ImageToolkit\Operation\imagick\ImagickOperationBase;
use Imagick;
use ImagickPixel;

/**
 * Defines imagick advance resize operation.
 *
 * @ImageToolkitOperation(
 *   id = "imagick_advance_resize",
 *   toolkit = "imagick",
 *   operation = "advance_resize",
 *   label = @Translation("Advance Resize"),
 *   description = @Translation("Advance Resizes an image to the given dimensions, add white background if need.")
 * )
 */
class AdvanceResize extends ImagickOperationBase {

  /**
   * {@inheritdoc}
   */
  protected function arguments() {
    return [
      'width' => [
        'description' => 'The new width of the resized image, in pixels',
      ],
      'height' => [
        'description' => 'The new height of the resized image, in pixels',
      ],
    ];
  }

  /**
   * {@inheritdoc}
   */
  protected function validateArguments(array $arguments) {

    // Assure integers for all arguments.
    $arguments['width'] = (int) round($arguments['width']);
    $arguments['height'] = (int) round($arguments['height']);

    // Fail when width or height are 0 or negative.
    if ($arguments['width'] <= 0) {
      throw new \InvalidArgumentException("Invalid width ('{$arguments['width']}') specified for the image 'resize' operation");
    }
    if ($arguments['height'] <= 0) {
      throw new \InvalidArgumentException("Invalid height ('{$arguments['height']}') specified for the image 'resize' operation");
    }
    return $arguments;
  }

  /**
   * {@inheritdoc}
   */
  protected function execute(array $arguments = []) {

    // Create a new resource of the required dimensions, and copy and resize
    // the original resource on it with resampling. Destroy the original
    // resource upon success.
    $w = $arguments['width'];
    $h = $arguments['height'];
    $src_x = 0;
    $src_y = 0;
    $src_w = $this
      ->getToolkit()
      ->getWidth();
    $src_h = $this
      ->getToolkit()
      ->getHeight();
    $dst_w = $src_w;
    $dst_h = $src_h;
    $dst_x = 0;
    $dst_y = 0;
    if ($w > $src_w) {
      $dst_x = ($w - $src_w) / 2;
    }
    if ($h > $src_h) {
      $dst_y = ($h - $src_h) / 2;
    }
    $original_resource = $this
      ->getToolkit()
      ->getResource();
    $dst_image = new Imagick();
    $dst_image
      ->newImage($w, $h, new ImagickPixel("white"));
    $dst_image
      ->compositeImage($original_resource, Imagick::COMPOSITE_DEFAULT, $dst_x, $dst_y);
    $image_format = $original_resource
      ->getImageFormat();
    $dst_image
      ->setImageFormat($image_format);
    $original_resource
      ->destroy();
    $this
      ->getToolkit()
      ->setResource($dst_image);
    return TRUE;
  }

}

Classes

Name	Description
AdvanceResize	Defines imagick advance resize operation.