function hook_image_default_styles

Provide module-based image styles for reuse throughout Drupal.

This hook allows your module to provide image styles. This may be useful if you require images to fit within exact dimensions. Note that you should attempt to re-use the default styles provided by Image module whenever possible, rather than creating image styles that are specific to your module. Image provides the styles "thumbnail", "medium", and "large".

You may use this hook to more easily manage your site's changes by moving existing image styles from the database to a custom module. Note however that moving image styles to code instead storing them in the database has a negligible effect on performance, since custom image styles are loaded from the database all at once. Even if all styles are pulled from modules, Image module will still perform the same queries to check the database for any custom styles.

Return value

An array of image styles, keyed by the style name.

See also


Related topics

1 function implements hook_image_default_styles()

Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.

image_image_default_styles in drupal/modules/image/image.module
Implements hook_image_default_styles().
1 invocation of hook_image_default_styles()
image_styles in drupal/modules/image/image.module
Gets an array of all styles and their settings.


drupal/modules/image/image.api.php, line 176
Hooks related to image styles and effects.


function hook_image_default_styles() {
  $styles = array();
  $styles['mymodule_preview'] = array(
    'label' => 'My module preview',
    'effects' => array(
        'name' => 'image_scale',
        'data' => array(
          'width' => 400,
          'height' => 400,
          'upscale' => 1,
        'weight' => 0,
        'name' => 'image_desaturate',
        'data' => array(),
        'weight' => 1,
  return $styles;