Enable 4:2:0 chroma subsampling for JPEG thumbnails

[lhc/web/wiklou.git] / RELEASE-NOTES-1.27

diff --git a/RELEASE-NOTES-1.27 b/RELEASE-NOTES-1.27
index 7ddcdfb..9b77cd1 100644 (file)
--- a/RELEASE-NOTES-1.27
+++ b/RELEASE-NOTES-1.27
@@ -190,6 +190,9 @@ HHVM 3.1. Additionally, the following PHP extensions are required:
   is deprecated.
 * (T33313) Add a preference for watching uploads by default, also applies
   to API-based upload tools.
+* $wgJpegPixelFormat was added to override chroma subsampling for JPEG image
+  thumbnails created via ImageMagick. Defaults to 'yuv420', providing bandwidth
+  savings versus the previous behavior on many files.
 
 === External library changes in 1.27 ===
 
@@ -463,6 +466,10 @@ changes to languages because of Phabricator reports.
 * Skin::tooltipAndAccesskeyAttribs was removed (deprecated since 1.21).
 * Skin::userTalkLink was removed (deprecated since 1.21).
 * Skin::userToolLinksRedContribs was removed (deprecated since 1.21).
+* wikidiff3 is now the default and only PHP diff engine. It provides improved diff
+  performance on complex changes. $wgExternalDiffEngine = 'wikidiff3' therefore
+  makes no difference now. Users are still recommended to use wikidiff2 if possible,
+  though.
 
 == Compatibility ==