Originally posted by siride
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If Or When Will X12 Actually Materialize?
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There's the xserver itself, the protocol headers, the client libs, mesa, input and output drivers, fonts, apps, and utils needed for building (libpciaccess, libpixman, etc.). In addition certain parts have external dependencies as well. You only need certain parts depending on what you are building. So if you look at http://cgit.freedesktop.org/ you can see how the xorg related bits are organized. Repos prefixed with /xorg/app are demo X apps that provide various functionality. They are not required to build the xserver. In most cases, the versions installed on your system are fine. Repos prefixed /xorg/font are the old font packages. In general there's no need for these as well. /xorg/util are various utilities used for building and maintaining the code and making releases. The macros package is the most important as it includes the latest m4 macros needed to build the xserver and related things like the drivers. /xorg/driver are the input (mouse, keyboard, etc.) drivers and output (video; ati, intel, s3, etc.) drivers. The input driver provide special handling and options for input hardware. The output provide gpu specific acceleration and in some cases modesetting code. /xorg/lib are the client libraries. Applications that want to use X or a certain extension (Xv, XvMC, Xfixes, etc.) need to have the client libs available. Note that you don't really have to update the client libs to build a newer xserver. /xorg/proto are the protocol headers. These are needed by the xserver and the client libs as they define the protocol for X11 and extensions. /xorg/xserver is the xserver itself. And finally xcb is the new X C binding.
As to the xserver source itself (http://cgit.freedesktop.org/xorg/xserver/tree/), you have the server side implementations of various extensions (Xv, xrandr, render, glx, record, composite, damage, etc.), the rendering code, the input handling code, the acceleration infrastructures (XAA and EXA), common code for modesetting and display handling (edid parsing, i2c) and code for parsing config files and loading drivers.
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