function ScaleAndCrop::validateArguments

Overrides ImageToolkitOperationBase::validateArguments

File

core/modules/system/src/Plugin/ImageToolkit/Operation/gd/ScaleAndCrop.php, line 47

Class

ScaleAndCrop

Defines GD2 Scale and crop operation.

Namespace

Drupal\system\Plugin\ImageToolkit\Operation\gd

Code

protected function validateArguments(array $arguments) {
    $actualWidth = $this->getToolkit()
        ->getWidth();
    $actualHeight = $this->getToolkit()
        ->getHeight();
    $scaleFactor = max($arguments['width'] / $actualWidth, $arguments['height'] / $actualHeight);
    $arguments['x'] = isset($arguments['x']) ? (int) round($arguments['x']) : (int) round(($actualWidth * $scaleFactor - $arguments['width']) / 2);
    $arguments['y'] = isset($arguments['y']) ? (int) round($arguments['y']) : (int) round(($actualHeight * $scaleFactor - $arguments['height']) / 2);
    $arguments['resize'] = [
        'width' => (int) round($actualWidth * $scaleFactor),
        'height' => (int) round($actualHeight * $scaleFactor),
    ];
    // Fail when width or height are 0 or negative.
    if ($arguments['width'] <= 0) {
        throw new \InvalidArgumentException("Invalid width ('{$arguments['width']}') specified for the image 'scale_and_crop' operation");
    }
    if ($arguments['height'] <= 0) {
        throw new \InvalidArgumentException("Invalid height ('{$arguments['height']}') specified for the image 'scale_and_crop' operation");
    }
    return $arguments;
}