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Jonas Dreßler 72054332c5 cogl/clip-stack: Restore old matrices after drawing to stencil buffer 
When using a region clip and something has a rectangle clip pushed, a
special drawing method for ClutterTexts (emit_vertex_buffer_geometry()
in cogl-pango-display-list.c) starts to fail and clipping issues with
long texts (because emit_vertex_buffer_geometry() is only used for texts
longer than 25 characters) start to appear. This specifically happened
in Looking Glass, where the StViewport of the ScrollView sets a
rectangle clips and the texts are usually longer than 25 characters.

This is caused by the changing of the perspective and modelview matrix
when drawing to the stencil buffer and started happening when
region-clipping was introduced with commit 8598b654. Even though the
changing of the matrices was done before that, too, the issue probably
didn't happen because `rect->can_be_scissor` was TRUE and no stencil
buffer clipping was used at all.

To fix this, temporarily save the old matrices, then set the new ones
and restore the old ones when we're done drawing to the stencil buffer.

Fixes https://gitlab.gnome.org/GNOME/gnome-shell/issues/2246

https://gitlab.gnome.org/GNOME/mutter/merge_requests/1096
2020-02-29 19:29:31 +00:00
.gitlab/issue_templates gitlab: Add missing < in markdown comment tag 2020-02-14 03:10:28 +00:00
.gitlab-ci ci: Adjust URL check 2020-02-26 06:28:46 +00:00
clutter clutter-actor: Add detail to captured-event 2020-02-29 13:34:00 +00:00
cogl cogl/clip-stack: Restore old matrices after drawing to stencil buffer 2020-02-29 19:29:31 +00:00
data display: Make check-alive timeout configureable 2020-02-23 17:28:57 +00:00
doc Remove obsolete .cvsignore files 2019-01-10 11:50:54 -02:00
meson build: Add postinstall script 2019-08-27 09:57:54 +00:00
po Update Japanese translation 2020-02-29 16:06:38 +00:00
src build: ensure absolute path to sysprof dbus interface dir 2020-02-29 13:17:40 +01:00
tools tools: Remove obsolete ppa-magic.py 2018-11-30 11:12:12 +08:00
.gitignore project: Update gitignore 2019-01-10 11:50:54 -02:00
.gitlab-ci.yml ci: Update docker image to v3 2019-10-29 02:11:02 +01:00
config.h.meson main: Make process PR_SET_DUMPABLE 2019-09-27 14:27:09 +00:00
COPYING Updated obsolete FSF postal address in COPYING 2014-01-12 08:44:30 +07:00
meson_options.txt cogl: Add libsysprof capture based tracing 2019-05-31 11:55:56 -03:00
meson.build build: ensure absolute path to sysprof dbus interface dir 2020-02-29 13:17:40 +01:00
mutter.doap doap: Update list of maintainers 2019-10-16 12:33:47 +02:00
NEWS Bump version to 3.35.91 2020-02-17 13:05:40 +01:00
README.md README: Add contribution section 2019-02-14 15:38:46 +01:00

README.md

Mutter

Mutter is a Wayland display server and X11 window manager and compositor library.

When used as a Wayland display server, it runs on top of KMS and libinput. It implements the compositor side of the Wayland core protocol as well as various protocol extensions. It also has functionality related to running X11 applications using Xwayland.

When used on top of Xorg it acts as a X11 window manager and compositing manager.

It contains functionality related to, among other things, window management, window compositing, focus tracking, workspace management, keybindings and monitor configuration.

Internally it uses a fork of Cogl, a hardware acceleration abstraction library used to simplify usage of OpenGL pipelines, as well as a fork af Clutter, a scene graph and user interface toolkit.

Mutter is used by, for example, GNOME Shell, the GNOME core user interface, and by Gala, elementary OS's window manager. It can also be run standalone, using the command "mutter", but just running plain mutter is only intended for debugging purposes.

Contributing

To contribute, open merge requests at https://gitlab.gnome.org/GNOME/mutter.

The coding style used is primarily the GNU flavor of the GNOME coding style with some minor additions such as preferring stdint.h types over GLib fundamental types, and a soft 80 character line limit. However, in general, look at the file you're editing for inspiration.

Commit messages should follow the GNOME commit message guidelines. We require an URL to either an issue or a merge request in each commit.

License

Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.