class SetCanvas in Image Effects 8

Defines GD2 set canvas operation.

Plugin annotation

@ImageToolkitOperation(
  id = "image_effects_gd_set_canvas",
  toolkit = "gd",
  operation = "set_canvas",
  label = @Translation("Set canvas"),
  description = @Translation("Lay the image over a colored canvas.")
)

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\image_effects\Plugin\ImageToolkit\Operation\gd\SetCanvas uses SetCanvasTrait

File

src/Plugin/ImageToolkit/Operation/gd/SetCanvas.php, line 20

Namespace

Drupal\image_effects\Plugin\ImageToolkit\Operation\gd

class SetCanvas extends GDImageToolkitOperationBase {
  use SetCanvasTrait;

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

    // Store the original resource.
    $original_res = $this
      ->getToolkit()
      ->getResource();

    // Prepare the canvas.
    $data = [
      'width' => $arguments['width'],
      'height' => $arguments['height'],
      'extension' => image_type_to_extension($this
        ->getToolkit()
        ->getType(), FALSE),
      'transparent_color' => $this
        ->getToolkit()
        ->getTransparentColor(),
      'is_temp' => TRUE,
    ];
    if (!$this
      ->getToolkit()
      ->apply('create_new', $data)) {
      return FALSE;
    }

    // Fill the canvas with required color.
    $data = [
      'rectangle' => new PositionedRectangle($arguments['width'], $arguments['height']),
      'fill_color' => $arguments['canvas_color'],
    ];
    if (!$this
      ->getToolkit()
      ->apply('draw_rectangle', $data)) {
      return FALSE;
    }

    // Overlay the current image on the canvas.
    imagealphablending($original_res, TRUE);
    imagesavealpha($original_res, TRUE);
    imagealphablending($this
      ->getToolkit()
      ->getResource(), TRUE);
    imagesavealpha($this
      ->getToolkit()
      ->getResource(), TRUE);
    if (imagecopy($this
      ->getToolkit()
      ->getResource(), $original_res, $arguments['x_pos'], $arguments['y_pos'], 0, 0, imagesx($original_res), imagesy($original_res))) {
      imagedestroy($original_res);
      return TRUE;
    }
    else {

      // In case of failure, destroy the temporary resource and restore
      // the original one.
      imagedestroy($this
        ->getToolkit()
        ->getResource());
      $this
        ->getToolkit()
        ->setResource($original_res);
    }
    return FALSE;
  }

}

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
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.
SetCanvas::execute	protected	function	Performs the actual manipulation on the image. Overrides ImageToolkitOperationBase::execute
SetCanvasTrait::arguments	protected	function
SetCanvasTrait::validateArguments	protected	function
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.