Image Style Scale and Crop from the top

sct.info

; $Id$
name = Image Style Scale and Crop from the top
description = Image style to scale an image and crop it from the top.
core = 7.x
package = ImageStyles

sct.module

<?php
/**
 * Implementation of hook_theme().
 */
function sct_theme() {
  $theme = array(
    'sct_scale_and_crop_top' => array(
      'file' => 'sct_actions.inc',
      'variables' => array('element' => NULL),
    ),
  );
  return $theme;
}

/**
 * Image effect "Scale and Crop from top".
 */
function sct_image_effect_info() {
  $effects['image_scale_and_crop_top'] = array(
    'label' => 'Scale and Crop from Top',
    'description' => 'Resize an image while maintaining aspect ratio, then crop it to the specified dimensions starting conserving the top part of the photo.',
    'effect callback' => 'sct_scale_and_crop_top_effect',
    'dimensions callback' => 'image_resize_dimensions',
    'form callback' => 'image_resize_form',
    'summary theme' => 'image_resize_summary',
  );

  return $effects;
}

/**
 * Image effect callback; Scale and crop an image from top.
 */
function sct_scale_and_crop_top_effect(&$image, $data) {
  $scale = max($data['width'] / $image->info['width'], $data['height'] / $image->info['height']);
  $x = ($image->info['width'] * $scale - $data['width']) / 2;
  $y = ($image->info['height'] * $scale - $data['height']) / 2;

  if (image_resize($image, $image->info['width'] * $scale, $image->info['height'] * $scale)) {
    return image_crop($image, $x, 0, $data['width'], $data['height']);
  }
  return FALSE;
}

sct_actions.inc

<?php
/**
 * Image Style Scale and Crop from the top
 */
function sct_scale_and_crop_top($element) {
  return theme_imagecache_resize($element);
}
function sct_scale_and_crop_top_image(&$image, $data) {
  if (!sct_scale_and_crop_top_process($image, $data['width'], $data['height'])) {
    watchdog('imagecache', 'imagecache_scale_and_crop failed. image: %image, data: %data.', array('%image' => $image->source, '%data' => print_r($data, TRUE)), WATCHDOG_ERROR);
    return FALSE;
  }
  return TRUE;
}
function theme_sct_scale_and_crop_top($element) {
  $data = $element['#value'];
  if ($data['width'] && $data['height']) {
    return check_plain($data['width']) . 'x' . check_plain($data['height']);
  }
  return ($data['width']) ? t('width @width', array('@width' => $data['width'])) : t('height @height', array('@height' => $data['height']));
  
}