MaskImageEffect.php in Image Effects 8

Namespace

Drupal\image_effects\Plugin\ImageEffect

File

src/Plugin/ImageEffect/MaskImageEffect.php

<?php

namespace Drupal\image_effects\Plugin\ImageEffect;

use Drupal\Core\Image\ImageFactory;
use Drupal\Core\Image\ImageInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\image\ConfigurableImageEffectBase;
use Drupal\image_effects\Component\ImageUtility;
use Drupal\image_effects\Plugin\ImageEffectsPluginBaseInterface;
use Psr\Log\LoggerInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Class MaskImageEffect.
 *
 * @ImageEffect(
 *   id = "image_effects_mask",
 *   label = @Translation("Mask"),
 *   description = @Translation("Apply a mask to the image.")
 * )
 */
class MaskImageEffect extends ConfigurableImageEffectBase implements ContainerFactoryPluginInterface {
  use AnchorTrait;

  /**
   * The image factory service.
   *
   * @var \Drupal\Core\Image\ImageFactory
   */
  protected $imageFactory;

  /**
   * The image selector plugin.
   *
   * @var \Drupal\image_effects\Plugin\ImageEffectsPluginBaseInterface
   */
  protected $imageSelector;

  /**
   * Constructs a MaskImageEffect object.
   *
   * @param array $configuration
   *   A configuration array containing information about the plugin instance.
   * @param string $plugin_id
   *   The plugin_id for the plugin instance.
   * @param array $plugin_definition
   *   The plugin implementation definition.
   * @param \Psr\Log\LoggerInterface $logger
   *   A logger instance.
   * @param \Drupal\Core\Image\ImageFactory $image_factory
   *   The image factory service.
   * @param \Drupal\image_effects\Plugin\ImageEffectsPluginBaseInterface $image_selector
   *   The image selector plugin.
   */
  public function __construct(array $configuration, $plugin_id, array $plugin_definition, LoggerInterface $logger, ImageFactory $image_factory, ImageEffectsPluginBaseInterface $image_selector) {
    parent::__construct($configuration, $plugin_id, $plugin_definition, $logger);
    $this->imageFactory = $image_factory;
    $this->imageSelector = $image_selector;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($configuration, $plugin_id, $plugin_definition, $container
      ->get('logger.factory')
      ->get('image'), $container
      ->get('image.factory'), $container
      ->get('plugin.manager.image_effects.image_selector')
      ->getPlugin());
  }

  /**
   * {@inheritdoc}
   */
  public function defaultConfiguration() {
    return [
      'mask_image' => '',
      'mask_width' => NULL,
      'mask_height' => NULL,
      'placement' => 'center-center',
      'x_offset' => NULL,
      'y_offset' => NULL,
    ] + parent::defaultConfiguration();
  }

  /**
   * {@inheritdoc}
   */
  public function getSummary() {
    $summary = [
      '#theme' => 'image_effects_mask_summary',
      '#data' => $this->configuration,
    ];
    $summary += parent::getSummary();

    // Get the human readable label for placement.
    $summary['#data']['placement'] = $this
      ->anchorOptions()[$summary['#data']['placement']];
    return $summary;
  }

  /**
   * {@inheritdoc}
   */
  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
    $options = [
      '#title' => $this
        ->t('Mask image'),
      '#description' => $this
        ->t('Image to use for masking. The mask file should be a grayscale image, where full white pixels will let the original image through, and full black pixels will hide it.'),
      '#default_value' => $this->configuration['mask_image'],
      '#required' => TRUE,
    ];
    $form['mask_image'] = $this->imageSelector
      ->selectionElement($options);
    $form['mask_resize'] = [
      '#type' => 'details',
      '#title' => $this
        ->t('Mask resize'),
      '#description' => $this
        ->t('Select dimensions either in pixels or as percentage of the <strong>current canvas</strong>. Leaving one dimension empty will resize the mask maintaing its aspect ratio. Leave both dimensions empty to apply the mask in its original dimensions.'),
      '#open' => TRUE,
    ];
    $form['mask_resize']['mask_width'] = [
      '#type' => 'image_effects_px_perc',
      '#title' => $this
        ->t('Mask width'),
      '#default_value' => $this->configuration['mask_width'],
      '#size' => 5,
      '#maxlength' => 5,
      '#required' => FALSE,
    ];
    $form['mask_resize']['mask_height'] = [
      '#type' => 'image_effects_px_perc',
      '#title' => $this
        ->t('Mask height'),
      '#default_value' => $this->configuration['mask_height'],
      '#size' => 5,
      '#maxlength' => 5,
      '#required' => FALSE,
    ];
    $form['placement'] = [
      '#type' => 'radios',
      '#title' => $this
        ->t('Placement'),
      '#options' => $this
        ->anchorOptions(),
      '#theme' => 'image_anchor',
      '#default_value' => $this->configuration['placement'],
      '#description' => $this
        ->t('Position of the mask on the canvas.'),
      '#required' => TRUE,
    ];
    $form['x_offset'] = [
      '#type' => 'image_effects_px_perc',
      '#title' => $this
        ->t('Horizontal offset'),
      '#description' => $this
        ->t("Additional horizontal offset from placement. Enter a value, and specify if pixels or percent of the canvas width. '+' or no sign shifts the mask rightward, '-' sign leftward."),
      '#default_value' => $this->configuration['x_offset'],
      '#maxlength' => 4,
      '#size' => 4,
    ];
    $form['y_offset'] = [
      '#type' => 'image_effects_px_perc',
      '#title' => $this
        ->t('Vertical offset'),
      '#description' => $this
        ->t("Additional vertical offset from placement. Enter a value, and specify if pixels or percent of the canvas height. '+' or no sign shifts the mask downward, '-' sign upward."),
      '#default_value' => $this->configuration['y_offset'],
      '#maxlength' => 4,
      '#size' => 4,
    ];
    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
    parent::submitConfigurationForm($form, $form_state);
    $this->configuration['mask_image'] = $form_state
      ->getValue('mask_image');
    $this->configuration['mask_width'] = $form_state
      ->getValue([
      'mask_resize',
      'mask_width',
    ]);
    $this->configuration['mask_height'] = $form_state
      ->getValue([
      'mask_resize',
      'mask_height',
    ]);
    $this->configuration['placement'] = $form_state
      ->getValue('placement');
    $this->configuration['x_offset'] = $form_state
      ->getValue('x_offset');
    $this->configuration['y_offset'] = $form_state
      ->getValue('y_offset');
  }

  /**
   * {@inheritdoc}
   */
  public function applyEffect(ImageInterface $image) {

    // Get the mask image object.
    $mask_image = $this->imageFactory
      ->get($this->configuration['mask_image']);
    if (!$mask_image
      ->isValid()) {
      $this->logger
        ->error('Image mask failed using the %toolkit toolkit on %path', [
        '%toolkit' => $image
          ->getToolkitId(),
        '%path' => $this->configuration['mask_image'],
      ]);
      return FALSE;
    }

    // Determine mask dimensions if they need to be changed.
    if ((bool) $this->configuration['mask_width'] || (bool) $this->configuration['mask_height']) {
      $mask_aspect = $mask_image
        ->getHeight() / $mask_image
        ->getWidth();
      $mask_width = ImageUtility::percentFilter($this->configuration['mask_width'], $image
        ->getWidth());
      $mask_height = ImageUtility::percentFilter($this->configuration['mask_height'], $image
        ->getHeight());
      if ($mask_width && !$mask_height) {
        $mask_height = (int) round($mask_width * $mask_aspect);
      }
      elseif (!$mask_width && $mask_height) {
        $mask_width = (int) round($mask_height / $mask_aspect);
      }
    }
    else {
      $mask_width = $mask_image
        ->getWidth();
      $mask_height = $mask_image
        ->getHeight();
    }

    // Calculate position of mask on source image based on placement option.
    list($x, $y) = explode('-', $this->configuration['placement']);
    $x_pos = round(image_filter_keyword($x, $image
      ->getWidth(), $mask_width));
    $y_pos = round(image_filter_keyword($y, $image
      ->getHeight(), $mask_height));

    // Calculate offset based on px/percentage.
    $x_offset = (int) ImageUtility::percentFilter($this->configuration['x_offset'], $image
      ->getWidth());
    $y_offset = (int) ImageUtility::percentFilter($this->configuration['y_offset'], $image
      ->getHeight());
    return $image
      ->apply('mask', [
      'mask_image' => $mask_image,
      'mask_width' => $mask_width !== $mask_image
        ->getWidth() ? $mask_width : NULL,
      'mask_height' => $mask_height !== $mask_image
        ->getHeight() ? $mask_height : NULL,
      'x_offset' => $x_pos + $x_offset,
      'y_offset' => $y_pos + $y_offset,
    ]);
  }

}

Classes

Name	Description
MaskImageEffect	Class MaskImageEffect.