class ScaleAndCrop in ImageMagick 8

Defines imagemagick Scale and crop operation.

Plugin annotation

@ImageToolkitOperation(
  id = "imagemagick_scale_and_crop",
  toolkit = "imagemagick",
  operation = "scale_and_crop",
  label = @Translation("Scale and crop"),
  description = @Translation("Scales an image to the exact width and height given. This plugin achieves the target aspect ratio by cropping the original image equally on both sides, or equally on the top and bottom. This function is useful to create uniform sized avatars from larger images.")
)

Hierarchy

• class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
  • class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
    • class \Drupal\Core\ImageToolkit\ImageToolkitOperationBase implements ImageToolkitOperationInterface
      • class \Drupal\imagemagick\Plugin\ImageToolkit\Operation\imagemagick\ImagemagickImageToolkitOperationBase
        • class \Drupal\imagemagick\Plugin\ImageToolkit\Operation\imagemagick\ScaleAndCrop

File

src/Plugin/ImageToolkit/Operation/imagemagick/ScaleAndCrop.php, line 16

Namespace

Drupal\imagemagick\Plugin\ImageToolkit\Operation\imagemagick

class ScaleAndCrop extends ImagemagickImageToolkitOperationBase {

  /**
   * {@inheritdoc}
   */
  protected function arguments() {
    return [
      'width' => [
        'description' => 'The target width, in pixels',
      ],
      'height' => [
        'description' => 'The target height, in pixels',
      ],
      'filter' => [
        'description' => 'An optional filter to apply for the resize',
        'required' => FALSE,
        'default' => '',
      ],
    ];
  }

  /**
   * {@inheritdoc}
   */
  protected function validateArguments(array $arguments) {
    $actual_width = $this
      ->getToolkit()
      ->getWidth();
    $actual_height = $this
      ->getToolkit()
      ->getHeight();
    $scale_factor = max($arguments['width'] / $actual_width, $arguments['height'] / $actual_height);
    $arguments['x'] = (int) round(($actual_width * $scale_factor - $arguments['width']) / 2);
    $arguments['y'] = (int) round(($actual_height * $scale_factor - $arguments['height']) / 2);
    $arguments['resize'] = [
      'width' => (int) round($actual_width * $scale_factor),
      'height' => (int) round($actual_height * $scale_factor),
      'filter' => $arguments['filter'],
    ];

    // 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;
  }

  /**
   * {@inheritdoc}
   */
  protected function execute(array $arguments = []) {
    return $this
      ->getToolkit()
      ->apply('resize', $arguments['resize']) && $this
      ->getToolkit()
      ->apply('crop', $arguments);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DependencySerializationTrait::$_entityStorages	protected	property	An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function		1
DependencySerializationTrait::__wakeup	public	function		2
ImagemagickImageToolkitOperationBase::getToolkit	protected	function	The correctly typed image toolkit for imagemagick operations. Overrides ImageToolkitOperationBase::getToolkit
ImageToolkitOperationBase::$logger	protected	property	A logger instance.
ImageToolkitOperationBase::$toolkit	protected	property	The image toolkit.
ImageToolkitOperationBase::apply	final public	function	Applies a toolkit specific operation to an image. Overrides ImageToolkitOperationInterface::apply
ImageToolkitOperationBase::prepareArguments	protected	function	Checks if required arguments are passed in and adds defaults for non passed in optional arguments.
ImageToolkitOperationBase::__construct	public	function	Constructs an image toolkit operation plugin. Overrides PluginBase::__construct
MessengerTrait::$messenger	protected	property	The messenger.	29
MessengerTrait::messenger	public	function	Gets the messenger.	29
MessengerTrait::setMessenger	public	function	Sets the messenger.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	3
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
ScaleAndCrop::arguments	protected	function	Returns the definition of the operation arguments. Overrides ImageToolkitOperationBase::arguments
ScaleAndCrop::execute	protected	function	Performs the actual manipulation on the image. Overrides ImageToolkitOperationBase::execute
ScaleAndCrop::validateArguments	protected	function	Validates the arguments. Overrides ImageToolkitOperationBase::validateArguments
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	1
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	2
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.