Form builder; Form for adding a new image style.
function image_style_add_form($form, &$form_state) {
$form['label'] = array(
'#type' => 'textfield',
'#title' => t('Administrative label'),
'#default_value' => '',
'#required' => TRUE,
);
$form['name'] = array(
'#type' => 'machine_name',
'#machine_name' => array(
'exists' => 'image_style_load',
),
'#default_value' => '',
'#required' => TRUE,
);
$form['submit'] = array(
'#type' => 'submit',
'#value' => t('Create new style'),
);
return $form;
}