class CreateNew in Drupal 8

Defines GD2 create_new image operation.

Plugin annotation

@ImageToolkitOperation(
  id = "gd_create_new",
  toolkit = "gd",
  operation = "create_new",
  label = @Translation("Set a new image"),
  description = @Translation("Creates a new transparent resource and sets it for the image.")
)

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\CreateNew

File

core/modules/system/src/Plugin/ImageToolkit/Operation/gd/CreateNew.php, line 18

Namespace

Drupal\system\Plugin\ImageToolkit\Operation\gd

class CreateNew extends GDImageToolkitOperationBase {

  /**
   * {@inheritdoc}
   */
  protected function arguments() {
    return [
      'width' => [
        'description' => 'The width of the image, in pixels',
      ],
      'height' => [
        'description' => 'The height of the image, in pixels',
      ],
      'extension' => [
        'description' => 'The extension of the image file (e.g. png, gif, etc.)',
        'required' => FALSE,
        'default' => 'png',
      ],
      'transparent_color' => [
        'description' => 'The RGB hex color for GIF transparency',
        'required' => FALSE,
        'default' => '#ffffff',
      ],
      'is_temp' => [
        'description' => 'If TRUE, this operation is being used to create a temporary image by another GD operation. After performing its function, the caller is responsible for destroying the original GD resource.',
        'required' => FALSE,
        'default' => FALSE,
      ],
    ];
  }

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

    // Assure extension is supported.
    if (!in_array($arguments['extension'], $this
      ->getToolkit()
      ->getSupportedExtensions())) {
      throw new \InvalidArgumentException("Invalid extension ('{$arguments['extension']}') specified for the image 'create_new' operation");
    }

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

    // Fail when width or height are 0 or negative.
    if ($arguments['width'] <= 0) {
      throw new \InvalidArgumentException("Invalid width ('{$arguments['width']}') specified for the image 'create_new' operation");
    }
    if ($arguments['height'] <= 0) {
      throw new \InvalidArgumentException("Invalid height ({$arguments['height']}) specified for the image 'create_new' operation");
    }

    // Assure transparent color is a valid hex string.
    if ($arguments['transparent_color'] && !Color::validateHex($arguments['transparent_color'])) {
      throw new \InvalidArgumentException("Invalid transparent color ({$arguments['transparent_color']}) specified for the image 'create_new' operation");
    }
    return $arguments;
  }

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

    // Get the image type.
    $type = $this
      ->getToolkit()
      ->extensionToImageType($arguments['extension']);

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

    // Create the resource.
    if (!($res = imagecreatetruecolor($arguments['width'], $arguments['height']))) {
      return FALSE;
    }

    // Fill the resource with transparency as possible.
    switch ($type) {
      case IMAGETYPE_PNG:
        imagealphablending($res, FALSE);
        $transparency = imagecolorallocatealpha($res, 0, 0, 0, 127);
        imagefill($res, 0, 0, $transparency);
        imagealphablending($res, TRUE);
        imagesavealpha($res, TRUE);
        break;
      case IMAGETYPE_GIF:
        if (empty($arguments['transparent_color'])) {

          // No transparency color specified, fill white transparent.
          $fill_color = imagecolorallocatealpha($res, 255, 255, 255, 127);
        }
        else {
          $fill_rgb = Color::hexToRgb($arguments['transparent_color']);
          $fill_color = imagecolorallocatealpha($res, $fill_rgb['red'], $fill_rgb['green'], $fill_rgb['blue'], 127);
          imagecolortransparent($res, $fill_color);
        }
        imagefill($res, 0, 0, $fill_color);
        break;
      case IMAGETYPE_JPEG:
        imagefill($res, 0, 0, imagecolorallocate($res, 255, 255, 255));
        break;
    }

    // Update the toolkit properties.
    $this
      ->getToolkit()
      ->setType($type);
    $this
      ->getToolkit()
      ->setResource($res);

    // Destroy the original resource if it is not needed by other operations.
    if (!$arguments['is_temp'] && is_resource($original_res)) {
      imagedestroy($original_res);
    }
    return TRUE;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
CreateNew::arguments	protected	function	Returns the definition of the operation arguments. Overrides ImageToolkitOperationBase::arguments
CreateNew::execute	protected	function	Performs the actual manipulation on the image. Overrides ImageToolkitOperationBase::execute
CreateNew::validateArguments	protected	function	Validates the arguments. Overrides ImageToolkitOperationBase::validateArguments
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.
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.