class ScaleAndCrop

Same name in other branches
  1. 8.9.x core/modules/system/src/Plugin/ImageToolkit/Operation/gd/ScaleAndCrop.php \Drupal\system\Plugin\ImageToolkit\Operation\gd\ScaleAndCrop
  2. 10 core/modules/system/src/Plugin/ImageToolkit/Operation/gd/ScaleAndCrop.php \Drupal\system\Plugin\ImageToolkit\Operation\gd\ScaleAndCrop
  3. 11.x core/modules/system/src/Plugin/ImageToolkit/Operation/gd/ScaleAndCrop.php \Drupal\system\Plugin\ImageToolkit\Operation\gd\ScaleAndCrop

Defines GD2 Scale and crop operation.

Plugin annotation


@ImageToolkitOperation(
  id = "gd_scale_and_crop",
  toolkit = "gd",
  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

Expanded class hierarchy of ScaleAndCrop

3 string references to 'ScaleAndCrop'
ImageTest::testScaleAndCropFails in core/tests/Drupal/Tests/Core/Image/ImageTest.php
Tests \Drupal\Core\Image\Image::scaleAndCrop().
ImageTest::testScaleAndCropHeight in core/tests/Drupal/Tests/Core/Image/ImageTest.php
Tests \Drupal\Core\Image\Image::scaleAndCrop().
ImageTest::testScaleAndCropWidth in core/tests/Drupal/Tests/Core/Image/ImageTest.php
Tests \Drupal\Core\Image\Image::scaleAndCrop().

File

core/modules/system/src/Plugin/ImageToolkit/Operation/gd/ScaleAndCrop.php, line 16

Namespace

Drupal\system\Plugin\ImageToolkit\Operation\gd
View source 
class ScaleAndCrop extends GDImageToolkitOperationBase {
    
    /**
     * {@inheritdoc}
     */
    protected function arguments() {
        return [
            'x' => [
                'description' => 'The horizontal offset for the start of the crop, in pixels',
                'required' => FALSE,
                'default' => NULL,
            ],
            'y' => [
                'description' => 'The vertical offset for the start the crop, in pixels',
                'required' => FALSE,
                'default' => NULL,
            ],
            'width' => [
                'description' => 'The target width, in pixels',
            ],
            'height' => [
                'description' => 'The target height, in pixels',
            ],
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    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;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function execute(array $arguments = []) {
        return $this->getToolkit()
            ->apply('resize', $arguments['resize']) && $this->getToolkit()
            ->apply('crop', $arguments);
    }

}

Members

Title Modifiers Object type Summary Overriden Title Overrides
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 for required arguments and adds optional argument defaults.
ImageToolkitOperationBase::__construct public function Constructs an image toolkit operation plugin.
PluginInspectionInterface::getPluginDefinition public function Gets the definition of the plugin implementation. 6
PluginInspectionInterface::getPluginId public function Gets the plugin_id of the plugin instance. 2
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

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