Index: wordpress/wp-admin/includes/image.php =================================================================== --- wordpress/wp-admin/includes/image.php (revision 7030) +++ wordpress/wp-admin/includes/image.php (working copy) @@ -227,26 +227,6 @@ return wp_constrain_dimensions( $width, $height, $wmax, $hmax ); } -// same as wp_shrink_dimensions, except the max parameters are optional. -// if either width or height are empty, no constraint is applied on that dimension. -function wp_constrain_dimensions( $current_width, $current_height, $max_width=0, $max_height=0 ) { - if ( !$max_width and !$max_height ) - return array( $current_width, $current_height ); - - $width_ratio = $height_ratio = 1.0; - - if ( $max_width > 0 && $current_width > $max_width ) - $width_ratio = $max_width / $current_width; - - if ( $max_height > 0 && $current_height > $max_height ) - $height_ratio = $max_height / $current_height; - - // the smaller ratio is the one we need to fit it to the constraining box - $ratio = min( $width_ratio, $height_ratio ); - - return array( intval($current_width * $ratio), intval($current_height * $ratio) ); -} - // convert a fraction string to a decimal function wp_exif_frac2dec($str) { @list( $n, $d ) = explode( '/', $str ); Index: wordpress/wp-includes/media.php =================================================================== --- wordpress/wp-includes/media.php (revision 7030) +++ wordpress/wp-includes/media.php (working copy) @@ -92,4 +92,138 @@ return $html; } +// same as wp_shrink_dimensions, except the max parameters are optional. +// if either width or height are empty, no constraint is applied on that dimension. +function wp_constrain_dimensions( $current_width, $current_height, $max_width=0, $max_height=0 ) { + if ( !$max_width and !$max_height ) + return array( $current_width, $current_height ); + + $width_ratio = $height_ratio = 1.0; + + if ( $max_width > 0 && $current_width > $max_width ) + $width_ratio = $max_width / $current_width; + + if ( $max_height > 0 && $current_height > $max_height ) + $height_ratio = $max_height / $current_height; + + // the smaller ratio is the one we need to fit it to the constraining box + $ratio = min( $width_ratio, $height_ratio ); + + return array( intval($current_width * $ratio), intval($current_height * $ratio) ); +} + +// calculate dimensions and coordinates for a resized image that fits within a specified width and height +// if $crop is true, the largest matching central portion of the image will be cropped out and resized to the required size +function image_resize_dimensions($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); + + $crop_w = ceil($new_w / $size_ratio); + $crop_h = ceil($new_h / $size_ratio); + + $s_x = floor(($orig_w - $crop_w)/2); + $s_y = floor(($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, $s_x, $s_y, $new_w, $new_h, $crop_w, $crop_h); + +} + +// Scale down an image to fit a particular size and save a new copy of the image +function image_resize( $file, $max_w, $max_h, $crop=false, $suffix=null, $dest_path=null, $jpeg_quality=75) { + + $image = wp_load_image( $file ); + if ( !is_resource( $image ) ) + return new WP_Error('error_loading_image', $image); + + list($orig_w, $orig_h, $orig_type) = getimagesize( $file ); + $dims = image_resize_dimensions($orig_w, $orig_h, $max_w, $max_h, $crop); + if (!$dims) + return $dims; + list($dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) = $dims; + + $newimage = imagecreatetruecolor( $dst_w, $dst_h); + + // preserve PNG transparency + if ( IMAGETYPE_PNG == $orig_type && function_exists( 'imagealphablending' ) && function_exists( 'imagesavealpha' ) ) { + imagealphablending( $newimage, false); + imagesavealpha( $newimage, true); + } + + imagecopyresampled( $newimage, $image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h); + + // 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 ) + $suffix = "{$dst_w}x{$dst_h}"; + + $info = pathinfo($file); + $dir = $info['dirname']; + $ext = $info['extension']; + $name = basename($file, ".{$ext}"); + if ( !is_null($dest_path) and $_dest_path = realpath($dest_path) ) + $dir = $_dest_path; + $destfilename = "{$dir}/{$name}-{$suffix}.{$ext}"; + + if ( $orig_type == IMAGETYPE_GIF ) { + if (!imagegif( $newimage, $destfilename ) ) + return new WP_Error('resize_path_invalid', __( 'Resize path invalid' )); + } + elseif ( $orig_type == IMAGETYPE_PNG ) { + if (!imagepng( $newimage, $destfilename ) ) + return new WP_Error('resize_path_invalid', __( 'Resize path invalid' )); + } + else { + // all other formats are converted to jpg + $destfilename = "{$dir}/{$name}-{$suffix}.jpg"; + if (!imagejpeg( $newimage, $destfilename, $jpeg_quality ) ) + 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; +} + ?> \ No newline at end of file