protected function GDToolkit::load in Drupal 9

Same name and namespace in other branches

1. 8 core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php \Drupal\system\Plugin\ImageToolkit\GDToolkit::load()

Loads a GD resource from a file.

Return value

bool TRUE or FALSE, based on success.

1 call to GDToolkit::load()

GDToolkit::getResource in core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php

Retrieves the GD image resource.

File

core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php, line 194

Class

GDToolkit

Defines the GD2 toolkit for image manipulation within Drupal.

Namespace

Drupal\system\Plugin\ImageToolkit

Code

protected function load() {

  // Return immediately if the image file is not valid.
  if (!$this
    ->isValid()) {
    return FALSE;
  }
  $function = 'imagecreatefrom' . image_type_to_extension($this
    ->getType(), FALSE);
  if (function_exists($function) && ($resource = $function($this
    ->getSource()))) {
    $this
      ->setResource($resource);
    if (imageistruecolor($resource)) {
      return TRUE;
    }
    else {

      // Convert indexed images to truecolor, copying the image to a new
      // truecolor resource, so that filters work correctly and don't result
      // in unnecessary dither.
      $data = [
        'width' => imagesx($resource),
        'height' => imagesy($resource),
        'extension' => image_type_to_extension($this
          ->getType(), FALSE),
        'transparent_color' => $this
          ->getTransparentColor(),
        'is_temp' => TRUE,
      ];
      if ($this
        ->apply('create_new', $data)) {
        imagecopy($this
          ->getResource(), $resource, 0, 0, 0, 0, imagesx($resource), imagesy($resource));
        imagedestroy($resource);
      }
    }
    return (bool) $this
      ->getResource();
  }
  return FALSE;
}