View difference between Paste ID: uyqmG6vX and B4cHwm3Y

 <?php
-/* Original code from:
+/*
- * http://bradt.ca/archives/image-crop-position-in-wordpress/
+
  *
- * Modified to WordPress Answers:
+
- * http://wordpress.stackexchange.com/q/51920/12615
+
  */
- * Check the function bt_image_make_intermediate_size
+
- * That's where the Thumbnails renaming occurs and all added images must be inserted
+
  * bt_add_image_size( 'product-screenshot', 300, 300, array( 'left', 'top' ) );
  * bt_add_image_size( 'product-feature', 460, 345, array( 'center', 'top' ) );
  */
 
 add_filter( 'intermediate_image_sizes_advanced', 'bt_intermediate_image_sizes_advanced' );
 add_filter( 'wp_generate_attachment_metadata', 'bt_generate_attachment_metadata', 10, 2 );
 
 /**
  * Registers a new image size with cropping positions
  *
  * The $crop parameter works as in the 'add_image_size' function taking true or
  * false values. If set to true, the default cropping position is 'center', 'center'.
  *
  * The $crop parameter also 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 bt_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' => $crop );
 }
 
 
 /**
  * Returning no sizes (an empty array) will force
  * wp_generate_attachment_metadata to skip creating intermediate image sizes on
  * upload, then we can run our own resizing functions by hooking into the
  * 'wp_generate_attachment_metadata' filter
  */
 function bt_intermediate_image_sizes_advanced( $sizes ) {
 	return array();
 }
 
 
 function bt_generate_attachment_metadata( $metadata, $attachment_id ) {
     $attachment = get_post( $attachment_id );
 
     $uploadPath = wp_upload_dir();
     $file = path_join($uploadPath['basedir'], $metadata['file']);
 
 	if ( !preg_match('!^image/!', get_post_mime_type( $attachment )) || !file_is_displayable_image( $file ) ) return $metadata;
 
     global $_wp_additional_image_sizes;
 
     foreach ( get_intermediate_image_sizes() as $s ) {
         $sizes[$s] = array( 'width' => '', 'height' => '', 'crop' => FALSE );
         if ( isset( $_wp_additional_image_sizes[$s]['width'] ) )
             $sizes[$s]['width'] = intval( $_wp_additional_image_sizes[$s]['width'] ); // For theme-added sizes
         else
             $sizes[$s]['width'] = get_option( "{$s}_size_w" ); // For default sizes set in options
         if ( isset( $_wp_additional_image_sizes[$s]['height'] ) )
             $sizes[$s]['height'] = intval( $_wp_additional_image_sizes[$s]['height'] ); // For theme-added sizes
         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'] = $_wp_additional_image_sizes[$s]['crop'];
         else
             $sizes[$s]['crop'] = get_option( "{$s}_crop" );
     }
 
     foreach ( $sizes as $size => $size_data ) {
         $resized = bt_image_make_intermediate_size( $file, $size_data['width'], $size_data['height'], $size_data['crop'] );
         if ( $resized )
-        $resized = bt_image_make_intermediate_size( $file, $size_data['width'], $size_data['height'], $size_data['crop'], $size );
+
     }
 
     return $metadata;
 }
 
 
 /**
  * Resize an image to make a thumbnail or intermediate size.
  *
  * The returned array has the file size, the image width, and image height. The
  * filter 'image_make_intermediate_size' can be used to hook in and change the
  * values of the returned array. The only parameter is the resized file path.
  *
  * @param string $file File path.
  * @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 bt_image_make_intermediate_size( $file, $width, $height, $crop = false ) {
 	if ( $width || $height ) {
-function bt_image_make_intermediate_size( $file, $width, $height, $crop = false, $size ) {
+		$resized_file = bt_image_resize( $file, $width, $height, $crop, null, null, 90 );
 		if ( !is_wp_error( $resized_file ) && $resized_file && $info = getimagesize( $resized_file ) ) {
-		switch($size) {
+
-			case 'thumbnail':
+
-				$suffix = 't';
+
-				break;
+
-			case 'medium':
+
-				$suffix = 'm';
+
-				break;
+
-			case 'large':
+
-				$suffix = 'l';
+
-				break;
+
-			default:
+
-				$suffix = null;
+
-				break;
+
 /**
-		$resized_file = bt_image_resize( $file, $width, $height, $crop, $suffix, null, 90 );
+
  *
  * 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.
  *
  * @param int $orig_w Original width.
  * @param int $orig_h Original height.
  * @param int $dest_w New width.
  * @param int $dest_h New height.
  * @param bool $crop Optional, default is false. Whether to crop image or resize.
  * @return bool|array False, on failure. Returned array matches parameters for imagecopyresampled() PHP function.
  */
 function bt_image_resize_dimensions($orig_w, $orig_h, $dest_w, $dest_h, $crop = false) {
 
 	if ($orig_w <= 0 || $orig_h <= 0)
 		return false;
 	// at least one of dest_w or dest_h must be specific
 	if ($dest_w <= 0 && $dest_h <= 0)
 		return false;
 
 	if ( $crop ) {
 		// crop the largest possible portion of the original image that we can size to $dest_w x $dest_h
 		$aspect_ratio = $orig_w / $orig_h;
 		$new_w = min($dest_w, $orig_w);
 		$new_h = min($dest_h, $orig_h);
 
 		if ( !$new_w ) {
 			$new_w = intval($new_h * $aspect_ratio);
 		}
 
 		if ( !$new_h ) {
 			$new_h = intval($new_w / $aspect_ratio);
 		}
 
 		$size_ratio = max($new_w / $orig_w, $new_h / $orig_h);
 
 		$crop_w = round($new_w / $size_ratio);
 		$crop_h = round($new_h / $size_ratio);
 
         if ( !is_array( $crop ) || count( $crop ) != 2 ) {
 			$crop = apply_filters( 'image_resize_crop_default', array( 'center', 'center' ) );
 		}
 
 		switch ( $crop[0] ) {
 			case 'left': $s_x = 0; break;
 			case 'right': $s_x = $orig_w - $crop_w; break;
 			default: $s_x = floor( ( $orig_w - $crop_w ) / 2 );
 		}
 
 		switch ( $crop[1] ) {
 			case 'top': $s_y = 0; break;
 			case 'bottom': $s_y = $orig_h - $crop_h; break;
 			default: $s_y = floor( ( $orig_h - $crop_h ) / 2 );
 		}
 	} else {
 		// don't crop, just resize using $dest_w x $dest_h as a maximum bounding box
 		$crop_w = $orig_w;
 		$crop_h = $orig_h;
 
 		$s_x = 0;
 		$s_y = 0;
 
 		list( $new_w, $new_h ) = wp_constrain_dimensions( $orig_w, $orig_h, $dest_w, $dest_h );
 	}
 
 	// if the resulting image would be the same size or larger we don't want to resize it
 	if ( $new_w >= $orig_w && $new_h >= $orig_h )
 		return false;
 
 	// the return array matches the parameters to imagecopyresampled()
 	// int dst_x, int dst_y, int src_x, int src_y, int dst_w, int dst_h, int src_w, int src_h
 	return array( 0, 0, (int) $s_x, (int) $s_y, (int) $new_w, (int) $new_h, (int) $crop_w, (int) $crop_h );
 
 }
 
 
 /**
  * Scale down an image to fit a particular size and save a new copy of the image.
  *
  * The PNG transparency will be preserved using the function, as well as the
  * image type. If the file going in is PNG, then the resized image is going to
  * be PNG. The only supported image types are PNG, GIF, and JPEG.
  *
  * Some functionality requires API to exist, so some PHP version may lose out
  * support. This is not the fault of WordPress (where functionality is
  * downgraded, not actual defects), but of your PHP version.
  *
  * @since 2.5.0
  *
  * @param string $file Image file path.
  * @param int $max_w Maximum width to resize to.
  * @param int $max_h Maximum height to resize to.
  * @param bool $crop Optional. Whether to crop image or resize.
  * @param string $suffix Optional. File Suffix.
  * @param string $dest_path Optional. New image file path.
  * @param int $jpeg_quality Optional, default is 90. Image quality percentage.
  * @return mixed WP_Error on failure. String with new destination path.
  */
 function bt_image_resize( $file, $max_w, $max_h, $crop = false, $suffix = null, $dest_path = null, $jpeg_quality = 90 ) {
 
 	$image = wp_load_image( $file );
 	if ( !is_resource( $image ) )
 		return new WP_Error( 'error_loading_image', $image, $file );
 
 	$size = @getimagesize( $file );
 	if ( !$size )
 		return new WP_Error('invalid_image', __('Could not read image size'), $file);
 	list($orig_w, $orig_h, $orig_type) = $size;
 
 	// Rotate if EXIF 'Orientation' is set
 	// This code is from the reverted patch at
 	// http://core.trac.wordpress.org/changeset/11746/trunk/wp-includes/media.php
 	$rotate = false;
 	if ( is_callable( 'exif_read_data' ) && in_array( $orig_type, apply_filters( 'wp_read_image_metadata_types', array( IMAGETYPE_JPEG, IMAGETYPE_TIFF_II, IMAGETYPE_TIFF_MM ) ) ) ) {
 		$exif = @exif_read_data( $file, null, true );
 		if ( $exif && isset( $exif['IFD0'] ) && is_array( $exif['IFD0'] ) && isset( $exif['IFD0']['Orientation'] ) ) {
 			if ( 6 == $exif['IFD0']['Orientation'] )
 				$rotate = 90;
 			elseif ( 8 == $exif['IFD0']['Orientation'] )
 				$rotate = 270;
 		}
 	}
 
 	if ( $rotate )
 		list($max_h,$max_w) = array($max_w,$max_h);
 
 	$dims = bt_image_resize_dimensions($orig_w, $orig_h, $max_w, $max_h, $crop);
 	if ( !$dims )
 		return new WP_Error( 'error_getting_dimensions', __('Could not calculate resized image dimensions') );
 	list($dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) = $dims;
 
 	$newimage = wp_imagecreatetruecolor( $dst_w, $dst_h );
 
 	if ( $rotate )
 		list($src_y,$src_x) = array($src_x,$src_y);
 
 	imagecopyresampled( $newimage, $image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);
 
 	// convert from full colors to index colors, like original PNG.
 	if ( IMAGETYPE_PNG == $orig_type && function_exists('imageistruecolor') && !imageistruecolor( $image ) )
 		imagetruecolortopalette( $newimage, false, imagecolorstotal( $image ) );
 
 	// we don't need the original in memory anymore
 	imagedestroy( $image );
 
 	// $suffix will be appended to the destination filename, just before the extension
 	if ( !$suffix ) {
 		if ( $rotate )
 			$suffix = "{$dst_h}x{$dst_w}";
 		else
 			$suffix = "{$dst_w}x{$dst_h}";
 	}
 
 	$info = pathinfo($file);
 	$dir = $info['dirname'];
 	$ext = $info['extension'];
 	$name = wp_basename($file, ".$ext");
 
 	if ( !is_null($dest_path) and $_dest_path = realpath($dest_path) )
 		$dir = $_dest_path;
 	$destfilename = "{$dir}/{$name}-{$suffix}.{$ext}";
 
 	if ( IMAGETYPE_GIF == $orig_type ) {
 		if ( !imagegif( $newimage, $destfilename ) )
 			return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
 	} elseif ( IMAGETYPE_PNG == $orig_type ) {
 		if ( !imagepng( $newimage, $destfilename ) )
 			return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
 	} else {
 		if ( $rotate ) {
 			$newimage = _rotate_image_resource( $newimage, 360 - $rotate );
 		}
 
 		// all other formats are converted to jpg
 		$destfilename = "{$dir}/{$name}-{$suffix}.jpg";
 		$return = imagejpeg( $newimage, $destfilename, apply_filters( 'jpeg_quality', $jpeg_quality, 'image_resize' ) );
 		if ( !$return )
 			return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
 	}
 
 	imagedestroy( $newimage );
 
 	// Set correct file permissions
 	$stat = stat( dirname( $destfilename ));
 	$perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits
 	@ chmod( $destfilename, $perms );
 
 	return $destfilename;
 }