function media_crop_get_image in Media crop 7

Page callback for image generation.

1 string reference to 'media_crop_get_image'

media_crop_menu in ./media_crop.module

Implements hook_menu().

File

./media_crop.module, line 593

Media crop primary module file.

Code

function media_crop_get_image($media_crop_instance) {
  if (!$media_crop_instance) {
    drupal_goto(drupal_get_path('module', 'media_crop') . '/images/loading.gif');
  }
  $angle = (int) $media_crop_instance->angle;
  $file = file_load($media_crop_instance->fid);
  $style_name = $media_crop_instance->image_style_name;
  $crop_x_coordinate = (int) $media_crop_instance->crop_x;
  $crop_y_coordinate = (int) $media_crop_instance->crop_y;
  $crop_width = (int) $media_crop_instance->crop_w;
  $crop_height = (int) $media_crop_instance->crop_h;
  $scale_width = (int) $media_crop_instance->crop_scale_w;
  $scale_height = (int) $media_crop_instance->crop_scale_h;
  $args = func_get_args();
  array_shift($args);
  $req_uri = implode('/', $args);
  $orig_uri = str_replace('://', '/', $file->uri);
  if ($req_uri != $orig_uri) {
    watchdog('media_crop', 'Request URI not equals to original URI.');
    drupal_access_denied();
  }
  unset($args);
  $style = image_style_load($style_name);
  if (!$style) {
    $style = array(
      'name' => $style_name,
      'effects' => array(),
    );
  }
  $derivative_uri = _media_crop_get_path($media_crop_instance->mciid, $file->uri);
  if (($scheme = file_uri_scheme($derivative_uri)) == 'private') {
    if (file_exists($derivative_uri)) {
      file_download($scheme, file_uri_target($derivative_uri));
    }
    else {
      $headers = module_invoke_all('file_download', $file->uri);
      if (in_array(-1, $headers) || empty($headers)) {
        watchdog('media_crop', 'No headers for file download.');
        return drupal_access_denied();
      }
      if (count($headers)) {
        foreach ($headers as $name => $value) {
          drupal_add_http_header($name, $value);
        }
      }
    }
  }
  $lock = drupal_hash_base64($file->uri . implode('/', array(
    $angle,
    $crop_x_coordinate,
    $crop_y_coordinate,
    $crop_width,
    $crop_height,
  )));
  if (!file_exists($derivative_uri)) {
    $lock_acquired = lock_acquire($lock);
    if (!$lock_acquired) {
      drupal_add_http_header('Status', '503 Service Unavailable');
      drupal_add_http_header('Retry-After', 3);
      print t('Image generation in progress. Try again shortly.', array(), array(
        'context' => 'Media crop',
      ));
      drupal_exit();
    }
  }
  $crop_object = (object) array(
    'uri' => $file->uri,
    'angle' => $angle,
    'style' => $style,
    'crop_x_coordinate' => $crop_x_coordinate,
    'crop_y_coordinate' => $crop_y_coordinate,
    'crop_width' => $crop_width,
    'crop_height' => $crop_height,
    'scale_height' => $scale_height,
    'scale_width' => $scale_width,
    'mciid' => $media_crop_instance->mciid,
  );
  $success = file_exists($derivative_uri) || media_crop_create_derivative($crop_object);
  if (!empty($lock_acquired)) {
    lock_release($lock);
  }
  if ($success) {
    $image = image_load($derivative_uri);
    file_transfer($image->source, array(
      'Content-Type' => $image->info['mime_type'],
      'Content-Length' => $image->info['file_size'],
    ));
  }
  else {
    watchdog('media_crop', 'Unable to generate the derived image located at %path.', array(
      '%path' => $derivative_uri,
    ));
    drupal_add_http_header('Status', '500 Internal Server Error');
    print t('Error generating image.', array(), array(
      'context' => 'Media crop',
    ));
    drupal_exit();
  }
  return NULL;
}