ebcea16e71
Rather than drawing the window contents from the shadow framebuffer, use Composite extension redirection to cause the server to maintain a bitmap image of each top-level X window, and draw the window contents from that, so that window contents which are occluded in the framebuffer show correctly in the task bar and task switcher previews. v2: Fix incorrect use of memset() found by gcc5 hw/xwin/winshadgdi.c: In function ‘winBltExposedWindowRegionShadowGDI’: hw/xwin/winshadgdi.c:861:9: warning: ‘memset’ used with constant zero length parameter; this could be due to transposed parameters [-Wmemset-transposed-args] v3: Turn on -compositewm by default v4: Ignore -swcursor if -compositewm -swcursor is not compatible with -compositewm (because the window contents are drawn from an off-screen pixmap, not from the screen pixmap, where the software cursor will be drawn). v5: Update meson.build also Add -compositewm option to help output Update CI to install prerequisites
X Server
The X server accepts requests from client applications to create windows, which are (normally rectangular) "virtual screens" that the client program can draw into.
Windows are then composed on the actual screen by the X server (or by a separate composite manager) as directed by the window manager, which usually communicates with the user via graphical controls such as buttons and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the following article: https://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the Xorg mailing list:
https://lists.freedesktop.org/mailman/listinfo/xorg
The master development code repository can be found at:
https://gitlab.freedesktop.org/xorg/xserver
For patch submission instructions, see:
https://www.x.org/wiki/Development/Documentation/SubmittingPatches
As with other projects hosted on freedesktop.org, X.Org follows its Code of Conduct, based on the Contributor Covenant. Please conduct yourself in a respectful and civilized manner when using the above mailing lists, bug trackers, etc: