147ed28bbf
Drivers may need to loop over the allocated screens during PreInit, for example to consolidate xorg.conf options that apply to a GPU device as a whole. Currently, this works for protocol screens becuase x86Screens is exported, but does not work for GPU screens. Export xf86GPUScreens and xf86NumGPUScreens for consistency with xf86Screens and xf86NumScreens. Signed-off-by: Aaron Plattner <aplattner@nvidia.com>
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
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