class SmartCrop in Image Effects 8

Defines Imagemagick Scale and Smart Crop operation.

Plugin annotation

@ImageToolkitOperation(
  id = "image_effects_imagemagick_smart_crop",
  toolkit = "imagemagick",
  operation = "smart_crop",
  label = @Translation("Smart Crop"),
  description = @Translation("Similar to Crop, but preserves the portion of the image with the most entropy.")
)

Hierarchy

• class \Drupal\image_effects\Plugin\ImageToolkit\Operation\imagemagick\SmartCrop extends \Drupal\imagemagick\Plugin\ImageToolkit\Operation\imagemagick\ImagemagickImageToolkitOperationBase uses GDOperationTrait, SmartCropTrait

File

src/Plugin/ImageToolkit/Operation/imagemagick/SmartCrop.php, line 20

Namespace

Drupal\image_effects\Plugin\ImageToolkit\Operation\imagemagick

class SmartCrop extends ImagemagickImageToolkitOperationBase {
  use SmartCropTrait;
  use GDOperationTrait;

  /**
   * {@inheritdoc}
   */
  protected function execute(array $arguments = []) {
    $file_system = \Drupal::service('file_system');
    $image_factory = \Drupal::service('image.factory');

    // Convert the image to disk at the current state, and reopen it using the
    // GD toolkit to allow determining the crop rectangle.
    $temp_path = $file_system
      ->tempnam('temporary://', 'image_effects_');
    $current_destination_format = $this
      ->getToolkit()
      ->arguments()
      ->getDestinationFormat();
    $this
      ->getToolkit()
      ->arguments()
      ->setDestinationFormatFromExtension('png');
    $this
      ->getToolkit()
      ->save($temp_path);
    $this
      ->getToolkit()
      ->arguments()
      ->setDestinationFormat($current_destination_format);
    $temp_image = $image_factory
      ->get($temp_path, 'gd');
    switch ($arguments['algorithm']) {
      case 'entropy_slice':
        $rect = $this
          ->getEntropyCropBySlicing($temp_image
          ->getToolkit()
          ->getResource(), $arguments['width'], $arguments['height']);
        break;
      case 'entropy_grid':
        $rect = $this
          ->getEntropyCropByGridding($temp_image
          ->getToolkit()
          ->getResource(), $arguments['width'], $arguments['height'], $arguments['simulate'], $arguments['algorithm_params']['grid_width'], $arguments['algorithm_params']['grid_height'], $arguments['algorithm_params']['grid_rows'], $arguments['algorithm_params']['grid_cols'], $arguments['algorithm_params']['grid_sub_rows'], $arguments['algorithm_params']['grid_sub_cols']);
        break;
    }
    $points = $this
      ->getRectangleCorners($rect);

    // Do not need the temporary image file any longer.
    $file_system
      ->unlink($temp_path);

    // Crop the image using the coordinates found above. If simulating, draw
    // a marker on the image instead.
    if (!$arguments['simulate']) {
      return $this
        ->getToolkit()
        ->apply('crop', [
        'x' => $points[6],
        'y' => $points[7],
        'width' => $rect
          ->getWidth(),
        'height' => $rect
          ->getHeight(),
      ]);
    }
    else {
      $rect
        ->translate([
        -2,
        -2,
      ]);
      for ($i = -2; $i <= 2; $i++) {
        $this
          ->getToolkit()
          ->apply('draw_rectangle', [
          'rectangle' => $rect,
          'border_color' => $i !== 0 ? '#00FF00FF' : '#FF0000FF',
        ]);
        $rect
          ->translate([
          1,
          1,
        ]);
      }
      for ($i = 0; $i < 8; $i += 2) {
        $this
          ->getToolkit()
          ->apply('draw_ellipse', [
          'cx' => $points[$i],
          'cy' => $points[$i + 1],
          'width' => 6,
          'height' => 6,
          'color' => '#FF0000FF',
        ]);
      }
    }
    return TRUE;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
GDOperationTrait::allocateColorFromRgba	protected	function	Allocates a GD color from an RGBA hexadecimal.
GDOperationTrait::filterOpacity	protected	function	Change overall image transparency level.
GDOperationTrait::getAreaEntropy	protected	function	Computes the entropy of the area of an image.
GDOperationTrait::getEntropyCropByGridding	protected	function	Computes the entropy crop of an image, using recursive gridding.
GDOperationTrait::getEntropyCropBySlicing	protected	function	Computes the entropy crop of an image, using slices.
GDOperationTrait::getRectangleCorners	protected	function	Convert a rectangle to a sequence of point coordinates.
GDOperationTrait::hexToRgba	protected	function	Convert a RGBA hex to its RGBA integer GD components.
GDOperationTrait::imageCopyGaussianBlurred	protected	function	Gets a copy of the source with the Gaussian Blur algorithm applied.
GDOperationTrait::imageCopyMergeAlpha	protected	function	Copy and merge part of an image, preserving alpha.
GDOperationTrait::imagettfbboxWrapper	protected	function	Wrapper of imagettfbbox().
GDOperationTrait::imagettftextWrapper	protected	function	Wrapper of imagettftext().
SmartCrop::execute	protected	function
SmartCropTrait::arguments	protected	function
SmartCropTrait::validateArguments	protected	function