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Creating intermediate sizes, better thumbnails, and other image improvements. Hat tip: tellyworth.

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git-svn-id: https://develop.svn.wordpress.org/trunk@7135 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Matt Mullenweg
2008-03-03 04:17:37 +00:00
parent 8415bccde9
commit 88bb527a19
7 changed files with 93 additions and 83 deletions
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wp-includes/media.php
+41 -10
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@@ -48,7 +48,7 @@ function image_hwstring($width, $height) {
}
// Scale an image to fit a particular size (such as 'thumb' or 'medium'), and return an image URL, height and width.
// The URL might be the original image, or it might be a resized version.
// The URL might be the original image, or it might be a resized version. This function won't create a new resized copy, it will just return an already resized one if it exists.
// returns an array($url, $width, $height)
function image_downsize($id, $size = 'medium') {
@@ -60,15 +60,19 @@ function image_downsize($id, $size = 'medium') {
if ( $out = apply_filters('image_downsize', false, $id, $size) )
return $out;
if ( $size == 'thumb' ) {
// thumbnail: use the thumb as the displayed image, and constrain based on its dimensions
$thumb_path = wp_get_attachment_thumb_file($id);
// the actual thumbnail size isn't stored so we'll have to calculate it
if ( $thumb_path && ($info = getimagesize($thumb_path)) ) {
list( $width, $height ) = image_constrain_size_for_editor( $info[0], $info[1], $size );
$img_url = wp_get_attachment_thumb_url($id);
// try for a new style intermediate size
if ( $intermediate = image_get_intermediate_size($id, $size) ) {
$img_url = str_replace(basename($img_url), $intermediate['file'], $img_url);
$width = $intermediate['width'];
$height = $intermediate['height'];
}
elseif ( $size == 'thumbnail' ) {
// fall back to the old thumbnail
if ( $thumb_file = wp_get_attachment_thumb_file() && $info = getimagesize($thumb_file) ) {
$img_url = str_replace(basename($img_url), basename($thumb_file), $img_url);
$width = $info[0];
$height = $info[1];
}
// this could be improved to provide a default thumbnail if one doesn't exist
}
elseif ( isset($meta['width'], $meta['height']) ) {
// any other type: use the real image and constrain it
@@ -226,4 +230,31 @@ function image_resize( $file, $max_w, $max_h, $crop=false, $suffix=null, $dest_p
return $destfilename;
}
?>
// resize an image to make a thumbnail or intermediate size, and return metadata describing the new copy
// returns false if no image was created
function image_make_intermediate_size($file, $width, $height, $crop=false) {
if ( $width || $height ) {
$resized_file = image_resize($file, $width, $height, $crop);
if ( $resized_file && $info = getimagesize($resized_file) ) {
return array(
'file' => basename( $resized_file ),
'width' => $info[0],
'height' => $info[1],
);
}
}
return false;
}
function image_get_intermediate_size($post_id, $size='thumbnail') {
if ( !$imagedata = wp_get_attachment_metadata( $post_id ) )
return false;
if ( empty($imagedata['sizes'][$size]) )
return false;
return $imagedata['sizes'][$size];
}
?>