protected function FocalPointEffectBase::calculateAnchor in Focal Point 8

Calculate the top left coordinates of crop rectangle.

This is based on Crop's anchor function with additional logic to ensure that crop area doesn't fall outside of the original image. Note that the image modules crop effect expects the top left coordinate of the crop rectangle.

Parameters

array $focal_point: The focal point value.

\Drupal\Core\Image\ImageInterface $image: The original image to be cropped.

\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::calculateAnchor()

FocalPointEffectBase::getAnchor in src/FocalPointEffectBase.php

Get the top-left anchor position of the crop area.

File

src/FocalPointEffectBase.php, line 304

Class

FocalPointEffectBase

Provides a base class for image effects.

Namespace

Drupal\focal_point

Code

protected function calculateAnchor(array $focal_point, ImageInterface $image, CropInterface $crop) {
  $crop_size = $crop
    ->size();

  // The anchor must be the top-left coordinate of the crop area but the focal
  // point is expressed as the center coordinates of the crop area.
  $anchor = [
    'x' => (int) ($focal_point['x'] - $crop_size['width'] / 2),
    'y' => (int) ($focal_point['y'] - $crop_size['height'] / 2),
  ];
  $anchor = $this
    ->constrainCropArea($anchor, $image, $crop);
  return $anchor;
}