Ticket #19393: 19393.2.diff

src/wp-admin/includes/image.php

@@ -97 +97 @@
                         else
                                 $sizes[$s]['height'] = get_option( "{$s}_size_h" ); // For default sizes set in options
                         if ( isset( $_wp_additional_image_sizes[$s]['crop'] ) )
-                                $sizes[$s]['crop'] = intval( $_wp_additional_image_sizes[$s]['crop'] ); // For theme-added sizes
+                                $sizes[$s]['crop'] = $_wp_additional_image_sizes[$s]['crop']; // For theme-added sizes
                         else
                                 $sizes[$s]['crop'] = get_option( "{$s}_crop" ); // For default sizes set in options
                 }

src/wp-includes/media.php

@@ -185 +185 @@
  *
  * @since 2.9.0
  *
- * @param string $name   The image size name.
- * @param int    $width  The image's width.
- * @param int    $height The image's width.
- * @param bool   $width  Whether to crop the image to fit the dimensions. Default false.
+ * In addition to true/false, the $crop parameter takes an array of the format
+ *  array( x_crop_position, y_crop_position )
+ *  x_crop_position can be 'left', 'center', 'right'
+ *  y_crop_position can be 'top', 'center', 'bottom'
+ *
+ * @param string $name Image size identifier.
+ * @param int $width Image width.
+ * @param int $height Image height.
+ * @param bool|array $crop Optional, default is false. Whether to crop image to specified height and width or resize. An array can specify positioning of the crop area.
+ * @return bool|array False, if no image was created. Metadata array on success.
  */
 function add_image_size( $name, $width = 0, $height = 0, $crop = false ) {
         global $_wp_additional_image_sizes;
+
         $_wp_additional_image_sizes[ $name ] = array(
                 'width'  => absint( $width ),
                 'height' => absint( $height ),
-                'crop'   => (bool) $crop,
+                'crop'   => $crop,
         );
 }
 
@@ -345 +352 @@
  * Retrieve calculated resized dimensions for use in WP_Image_Editor.
  *
  * Calculate dimensions and coordinates for a resized image that fits within a
- * specified width and height. If $crop is true, the largest matching central
- * portion of the image will be cropped out and resized to the required size.
+ * specified width and height.
+ *
+ * If $crop is true, the largest matching central portion of the image will
+ * be cropped out and resized to the required size.
+ *
+ * In addition to true/false, the $crop parameter takes an array of the format
+ *  array( x_crop_position, y_crop_position )
+ *  x_crop_position can be 'left', 'center', 'right'
+ *  y_crop_position can be 'top', 'center', 'bottom'
  *
  * @since 2.5.0
  * @uses apply_filters() Calls 'image_resize_dimensions' on $orig_w, $orig_h, $dest_w, $dest_h and
@@ -356 +370 @@
  * @param int $orig_h Original height.
  * @param int $dest_w New width.
  * @param int $dest_h New height.
- * @param bool $crop Optional, default is false. Whether to crop image or resize.
+ * @param bool|array $crop Optional, default is false. Whether to crop image to specified height and width or resize. An array can specify positioning of the crop area.
  * @return bool|array False on failure. Returned array matches parameters for imagecopyresampled() PHP function.
  */
 function image_resize_dimensions($orig_w, $orig_h, $dest_w, $dest_h, $crop = false) {
@@ -391 +405 @@
                 $crop_w = round($new_w / $size_ratio);
                 $crop_h = round($new_h / $size_ratio);
 
-                $s_x = floor( ($orig_w - $crop_w) / 2 );
-                $s_y = floor( ($orig_h - $crop_h) / 2 );
+                if ( ! is_array( $crop ) || count( $crop ) !== 2 ) {
+                        $crop = apply_filters( 'image_resize_crop_default', array( 'center', 'center' ) );
+                }
+
+                @list( $x, $y ) = $crop;
+
+                switch ( $x ) {
+                        case 'left':
+                                $s_x = 0;
+                                break;
+                        case 'right':
+                                $s_x = $orig_w - $crop_w;
+                                break;
+                        default:
+                                $s_x = floor( ( $orig_w - $crop_w ) / 2 );
+                                break;
+                }
+
+                switch ( $y ) {
+                        case 'top':
+                                $s_y = 0;
+                                break;
+                        case 'bottom':
+                                $s_y = $orig_h - $crop_h;
+                                break;
+                        default:
+                                $s_y = floor( ( $orig_h - $crop_h ) / 2 );
+                                break;
+                }
         } else {
                 // don't crop, just resize using $dest_w x $dest_h as a maximum bounding box
                 $crop_w = $orig_w;