** Attachment added: "metacity-theme-viewer focused unmaximized window" https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1780468/+attachment/5160983/+files/metacity_theme_viewer_focused_unmaximized.png
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to metacity in Ubuntu. https://bugs.launchpad.net/bugs/1780468 Title: Blurry titlebar font when window is not maximized Status in metacity package in Ubuntu: New Bug description: What happens ------------ I've configured Compiz window manager to use gtk-window-decorator so that it may apply my Metacity theme for the titlebars. With this decorator, I've noticed that Compiz renders slightly blurry titlebar fonts when a window is not maximized. Once the window is maximized, sharp fonts are rendered. When a window is not maximized, the font seems to lack sub-pixel hinting or anti-aliasing, hence the slightly blurry appearance. I zoomed in on the font when the window was maximized and observed bluish lines around the characters. When a window was not maximized, the zoomed-in characters didn't have the bluish lines. I've tested and seen that the Marco window manager and the Emerald decorator (used with Compiz) both render sharp titlebar fonts regardless of whether a window is maximized or not. The image in the below link shows the slight difference in font rendering when Compiz is used with gtk-window-decorator. Firefox's window was maximized, with sharp text, while VLC's window was not maximized, with slightly blurry text. https://i.stack.imgur.com/5BalZ.png Upon switching to Marco window manager, both texts are sharp. https://i.stack.imgur.com/9Gzli.png When the "Compiz with gtk-window-decorator" setup is zoomed-in, blue lines around the maximized Firefox window titlebar text are visible (it looks like sub-pixel rendering to me). The blue lines are completely lacking in the un-maximized VLC window titlebar text. https://i.stack.imgur.com/XDSAU.png What I expect to happen ----------------------- The titlebar font rendering should be sharp for both maximized and un-maximized windows. The cause (clip_to_rounded_corners) ----------------------------------- Upon investigating, I've discovered that Compiz's gtk-window-decorator uses the libmetacity library. The clip_to_rounded_corners() function in "meta-theme-metacity.c" is called to draw rounded corners for the un-maximized windows in my theme. It seems the call to draw rounded corners by cairo_arc() in that function somehow affects the font rendering. When windows are maximized, the drawing of rounded corners is not performed, hence the sharp font rendering. I rebuilt the libmetacity library with the clip_to_rounded_corners() call commented out and achieved sharp fonts for un-maximized windows. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: metacity 1:3.28.0-1 ProcVersionSignature: Ubuntu 4.15.0-24.26-generic 4.15.18 Uname: Linux 4.15.0-24-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 CurrentDesktop: MATE Date: Fri Jul 6 19:52:03 2018 InstallationDate: Installed on 2018-05-06 (61 days ago) InstallationMedia: Ubuntu-MATE 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) SourcePackage: metacity UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/1780468/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
