Version 1

[yaffs-website] / web / core / modules / system / src / Plugin / ImageToolkit / Operation / gd / Crop.php

diff --git a/web/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Crop.php b/web/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Crop.php
new file mode 100644 (file)
index 0000000..07a112b
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+++ b/web/core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Crop.php
@@ -0,0 +1,102 @@
+<?php
+
+namespace Drupal\system\Plugin\ImageToolkit\Operation\gd;
+
+/**
+ * Defines GD2 Crop operation.
+ *
+ * @ImageToolkitOperation(
+ *   id = "gd_crop",
+ *   toolkit = "gd",
+ *   operation = "crop",
+ *   label = @Translation("Crop"),
+ *   description = @Translation("Crops an image to a rectangle specified by the given dimensions.")
+ * )
+ */
+class Crop extends GDImageToolkitOperationBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function arguments() {
+    return [
+      'x' => [
+        'description' => 'The starting x offset at which to start the crop, in pixels',
+      ],
+      'y' => [
+        'description' => 'The starting y offset at which to start the crop, in pixels',
+      ],
+      'width' => [
+        'description' => 'The width of the cropped area, in pixels',
+        'required' => FALSE,
+        'default' => NULL,
+      ],
+      'height' => [
+        'description' => 'The height of the cropped area, in pixels',
+        'required' => FALSE,
+        'default' => NULL,
+      ],
+    ];
+  }
+
+  /**
+   * {@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 'crop' operation");
+    }
+
+    // Preserve aspect.
+    $aspect = $this->getToolkit()->getHeight() / $this->getToolkit()->getWidth();
+    $arguments['height'] = empty($arguments['height']) ? $arguments['width'] * $aspect : $arguments['height'];
+    $arguments['width'] = empty($arguments['width']) ? $arguments['height'] / $aspect : $arguments['width'];
+
+    // Assure integers for all arguments.
+    foreach (['x', 'y', 'width', 'height'] as $key) {
+      $arguments[$key] = (int) round($arguments[$key]);
+    }
+
+    // Fail when width or height are 0 or negative.
+    if ($arguments['width'] <= 0) {
+      throw new \InvalidArgumentException("Invalid width ('{$arguments['width']}') specified for the image 'crop' operation");
+    }
+    if ($arguments['height'] <= 0) {
+      throw new \InvalidArgumentException("Invalid height ('{$arguments['height']}') specified for the image 'crop' operation");
+    }
+
+    return $arguments;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function execute(array $arguments) {
+    // Create a new resource of the required dimensions, and copy and resize
+    // the original resource on it with resampling. Destroy the original
+    // resource upon success.
+    $original_resource = $this->getToolkit()->getResource();
+    $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', $data)) {
+      if (imagecopyresampled($this->getToolkit()->getResource(), $original_resource, 0, 0, $arguments['x'], $arguments['y'], $arguments['width'], $arguments['height'], $arguments['width'], $arguments['height'])) {
+        imagedestroy($original_resource);
+        return TRUE;
+      }
+      else {
+        // In case of failure, destroy the temporary resource and restore
+        // the original one.
+        imagedestroy($this->getToolkit()->getResource());
+        $this->getToolkit()->setResource($original_resource);
+      }
+    }
+    return FALSE;
+  }
+
+}