class Scale in Imagick 8

Defines imagick scale operation.

Plugin annotation

@ImageToolkitOperation(
  id = "imagick_scale",
  toolkit = "imagick",
  operation = "scale",
  label = @Translation("Scale"),
  description = @Translation("Scale an image to the given dimensions (ignoring aspect ratio).")
)

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\system\Plugin\ImageToolkit\Operation\gd\GDImageToolkitOperationBase
        • class \Drupal\system\Plugin\ImageToolkit\Operation\gd\Resize
          • class \Drupal\imagick\Plugin\ImageToolkit\Operation\imagick\Resize uses ImagickOperationTrait
            • class \Drupal\imagick\Plugin\ImageToolkit\Operation\imagick\Scale

File

src/Plugin/ImageToolkit/Operation/imagick/Scale.php, line 16

Namespace

Drupal\imagick\Plugin\ImageToolkit\Operation\imagick

class Scale extends Resize {

  /**
   * {@inheritdoc}
   */
  protected function validateArguments(array $arguments) {

    // Assure at least one dimension.
    if (empty($arguments['width']) && empty($arguments['height'])) {
      throw new \InvalidArgumentException("At least one dimension ('width' or 'height') must be provided to the image 'scale' operation");
    }

    // Calculate one of the dimensions from the other target dimension,
    // ensuring the same aspect ratio as the source dimensions. If one of the
    // target dimensions is missing, that is the one that is calculated. If both
    // are specified then the dimension calculated is the one that would not be
    // calculated to be bigger than its target.
    $aspect = $this
      ->getToolkit()
      ->getHeight() / $this
      ->getToolkit()
      ->getWidth();
    if ($arguments['width'] && !$arguments['height'] || $arguments['width'] && $arguments['height'] && $aspect < $arguments['height'] / $arguments['width']) {
      $arguments['height'] = (int) round($arguments['width'] * $aspect);
    }
    else {
      $arguments['width'] = (int) round($arguments['height'] / $aspect);
    }

    // Assure integers for all arguments.
    $arguments['width'] = (int) round($arguments['width']);
    $arguments['height'] = (int) round($arguments['height']);

    // Fail when width or height are 0 or negative.
    if ($arguments['width'] <= 0) {
      throw new \InvalidArgumentException($this
        ->t("Invalid width (@value) specified for the image 'scale' operation", [
        '@value' => $arguments['width'],
      ]));
    }
    if ($arguments['height'] <= 0) {
      throw new \InvalidArgumentException($this
        ->t("Invalid height (@value) specified for the image 'scale' operation", [
        '@value' => $arguments['height'],
      ]));
    }
    return $arguments;
  }

  /**
   * {@inheritdoc}
   */
  protected function execute(array $arguments = []) {

    // Don't scale if we don't change the dimensions at all.
    if ($arguments['width'] !== $this
      ->getToolkit()
      ->getWidth() || $arguments['height'] !== $this
      ->getToolkit()
      ->getHeight()) {

      // Don't upscale if the option isn't enabled.
      if ($arguments['upscale'] || $arguments['width'] <= $this
        ->getToolkit()
        ->getWidth() && $arguments['height'] <= $this
        ->getToolkit()
        ->getHeight()) {
        return parent::execute($arguments);
      }
    }
    return TRUE;
  }

}

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
GDImageToolkitOperationBase::getToolkit	protected	function	The correctly typed image toolkit for GD 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
ImagickOperationTrait::processFrames	protected	function	Process image frames for GIFs
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.
Resize::arguments	protected	function	Returns the definition of the operation arguments. Overrides ImageToolkitOperationBase::arguments	1
Resize::process	protected	function
Scale::execute	protected	function	Performs the actual manipulation on the image. Overrides Resize::execute
Scale::validateArguments	protected	function	Validates the arguments. Overrides Resize::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.