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Low level X11 programming

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Old 11-30-2015
Low level X11 programming
How to use X11 without Xlib not XCB? How draw window directly on low level?
I must use anyway window manager like Motif?
I have ridden that X11 has server-client architecture, client send via TCP/IP to port 6000 request for primitives and get replies.
Where is detailed description of it? In X11 doc is 35 directories like bigreqsproto, compositeproto, damageproto, dri2proto ...

I see that usually not using port 6000 but file (symlink) X0 in hidden directory /tmp/.X11-unix
----
I begin to understand thanks to x11protocol.pdf from doc.tar.bz2 from ftp://ftp.ntua.gr/pub/X11/X.org/X11R7.7, but I don't know if is possible copy bitmap from client to server? Is request CopyArea but this copy area from on place of screen to other. Requests are small and sending big bitmaps is time consuming especially with remote servers. In other hand - memory bitmaps enable fast pixel changing, for example I read jpg from file to memory. If I have image in memory, how send it to server?
Last edited by AndrzejB; 11-30-2015 at 07:44 PM.. Reason: x11protocol.pdf
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xseteventqueueowner

XSetEventQueueOwner(3)						  XLIB FUNCTIONS					    XSetEventQueueOwner(3)

NAME

       XSetEventQueueOwner - set event queue owner on a shared Xlib/XCB connection

SYNTAX


	       #include <X11/Xlib-xcb.h>

       void XSetEventQueueOwner(Display *dpy, enum XEventQueueOwner owner);

ARGUMENTS

       dpy	 Specifies the connection to the X server.

       owner	 Specifies the event queue ownership:

		 XlibOwnsEventQueue (default)
			Xlib owns the event queue.  Use the Xlib event-handling functions.  Do not call the XCB event-handling functions.

		 XCBOwnsEventQueue
			XCB owns the event queue.  Use the XCB event-handling functions.  Do not call the Xlib event-handling functions.

DESCRIPTION

       While  a  client  using Xlib/XCB can issue requests and handle their replies or errors with either Xlib or XCB, only one can own and handle
       the event queue.  By default, Xlib must own the event queue, for compatibility with legacy Xlib clients.  Clients can call  XSetEventQueue-
       Owner  immediately  after XOpenDisplay to let XCB own the event queue instead.  Clients may not call XSetEventQueueOwner at any other time,
       as this will potentially lose responses.

SEE ALSO

       XOpenDisplay(3), XGetXCBConnection(3),
       Xlib - C Language X Interface

X Version 11							   libX11 1.3.2 					    XSetEventQueueOwner(3)