protected function FocalPointEffectBase::constrainCropArea in Focal Point 8

Calculate the anchor such that the crop will not exceed the image boundary.

Given the top-left anchor (in pixels), the crop size and the image size, reposition the anchor to ensure the crop area does not exceed the bounds of the image.

Parameters

array $anchor: An array with the keys 'x' and 'y'. Values are in pixels representing the top left corner of the of the crop area relative to the image.

\Drupal\Core\Image\ImageInterface $image: The image to which the crop area must be constrained.

\Drupal\crop\CropInterface $crop: The crop object used to define the crop.

Return value

array An array with the keys 'x' and 'y'.

1 call to FocalPointEffectBase::constrainCropArea()

FocalPointEffectBase::calculateAnchor in src/FocalPointEffectBase.php

Calculate the top left coordinates of crop rectangle.

File

src/FocalPointEffectBase.php, line 337

Class

FocalPointEffectBase

Provides a base class for image effects.

Namespace

Drupal\focal_point

Code

protected function constrainCropArea(array $anchor, ImageInterface $image, CropInterface $crop) {
  $image_size = [
    'width' => $image
      ->getWidth(),
    'height' => $image
      ->getHeight(),
  ];
  $crop_size = $crop
    ->size();

  // Ensure that the crop area doesn't fall off the bottom right of the image.
  $anchor = [
    'x' => $anchor['x'] + $crop_size['width'] <= $image_size['width'] ? $anchor['x'] : $image_size['width'] - $crop_size['width'],
    'y' => $anchor['y'] = $anchor['y'] + $crop_size['height'] <= $image_size['height'] ? $anchor['y'] : $image_size['height'] - $crop_size['height'],
  ];

  // Ensure that the crop area doesn't fall off the top left of the image.
  $anchor = [
    'x' => max(0, $anchor['x']),
    'y' => max(0, $anchor['y']),
  ];
  return $anchor;
}