public function Base64ImageFormatter::viewElements in Entity Print 8.2

Builds a renderable array for a field value.

Parameters

\Drupal\Core\Field\FieldItemListInterface $items: The field values to be rendered.

string $langcode: The language that should be used to render the field.

Return value

array A renderable array for $items, as an array of child elements keyed by consecutive numeric indexes starting from 0.

Overrides ImageFormatter::viewElements

File

src/Plugin/Field/FieldFormatter/Base64ImageFormatter.php, line 49

Class

Base64ImageFormatter

Plugin implementation of the 'entity_print_base64_image_formatter' formatter.

Namespace

Drupal\entity_print\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
  $element = [];

  /** @var \Drupal\file\Entity\File $file */
  foreach ($items as $delta => $item) {
    $file = $item->entity;
    $uri = $file
      ->getFileUri();

    // If we have a image style, use that instead.
    if ($this
      ->getSetting('image_style')) {
      $image_style = ImageStyle::load($this
        ->getSetting('image_style'));
      $uri = $this
        ->getImageStyleUri($image_style, $file) ?: $uri;
    }
    $base_64_image = base64_encode(file_get_contents($uri));
    $filemime = $file
      ->getMimeType();
    $element[$delta] = [
      '#theme' => 'image',
      '#uri' => "data:{$filemime};charset=utf-8;base64,{$base_64_image}",
    ];
  }
  return $element;
}