| 1 image.api.php | hook_image_effect_info_alter(&$effects) | 
Alter the information provided in hook_image_effect_info().
Parameters
$effects: The array of image effects, keyed on the machine-readable effect name.
See also
Related topics
File
- core/modules/ image/ image.api.php, line 60 
- Hooks related to image styles and effects.
Code
function hook_image_effect_info_alter(&$effects) {
  // Override the Image module's crop effect with more options.
  $effects['image_crop']['effect callback'] = 'my_module_crop_effect';
  $effects['image_crop']['dimensions callback'] = 'my_module_crop_dimensions';
  $effects['image_crop']['form callback'] = 'my_module_crop_form';
}
