function image_rotate_effect

Image effect callback; Rotate an image resource.

Parameters

object $image: An image object returned by image_load().

array $data: An array of attributes to use when performing the rotate effect containing the following items:

• "degrees": The number of (clockwise) degrees to rotate the image.
• "random": A boolean indicating that a random rotation angle should be used for this image. The angle specified in "degrees" is used as a positive and negative maximum.
• "bgcolor": The background color to use for exposed areas of the image. Use web-style hex colors (#FFFFFF for white, #000000 for black). Leave blank for transparency on image types that support it.

Return value

bool TRUE on success. FALSE on failure to rotate image.

See also

image_rotate().

File

drupal/core/modules/image/image.effects.inc, line 261

Functions needed to execute image effects provided by Image module.

Code

function image_rotate_effect($image, $data) {

  // Set sane default values.
  $data += array(
    'degrees' => 0,
    'bgcolor' => NULL,
    'random' => FALSE,
  );

  // Convert short #FFF syntax to full #FFFFFF syntax.
  if (strlen($data['bgcolor']) == 4) {
    $c = $data['bgcolor'];
    $data['bgcolor'] = $c[0] . $c[1] . $c[1] . $c[2] . $c[2] . $c[3] . $c[3];
  }

  // Convert #FFFFFF syntax to hexadecimal colors.
  if ($data['bgcolor'] != '') {
    $data['bgcolor'] = hexdec(str_replace('#', '0x', $data['bgcolor']));
  }
  else {
    $data['bgcolor'] = NULL;
  }
  if (!empty($data['random'])) {
    $degrees = abs((double) $data['degrees']);
    $data['degrees'] = rand(-1 * $degrees, $degrees);
  }
  if (!image_rotate($image, $data['degrees'], $data['bgcolor'])) {
    watchdog('image', 'Image rotate failed using the %toolkit toolkit on %path (%mimetype, %dimensions)', array(
      '%toolkit' => $image->toolkit
        ->getPluginId(),
      '%path' => $image->source,
      '%mimetype' => $image->info['mime_type'],
      '%dimensions' => $image->info['width'] . 'x' . $image->info['height'],
    ), WATCHDOG_ERROR);
    return FALSE;
  }
  return TRUE;
}