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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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LEARN ABOUT CENTOS

xcb_change_save_set_checked

xcb_change_save_set(3)						   XCB Requests 					    xcb_change_save_set(3)

NAME

       xcb_change_save_set - Changes a client's save set

SYNOPSIS

       #include <xcb/xproto.h>

   Request function
       xcb_void_cookie_t xcb_change_save_set(xcb_connection_t *conn, uint8_t mode, xcb_window_t window);

REQUEST ARGUMENTS

       conn	 The XCB connection to X11.

       mode	 One of the following values:

		 XCB_SET_MODE_INSERT
			   TODO: NOT YET DOCUMENTED.

		 XCB_SET_MODE_DELETE
			   TODO: NOT YET DOCUMENTED.

		 Insert to add the specified window to the save set or Delete to delete it from the save set.

       window	 The window to add or delete to/from your save set.

DESCRIPTION

       TODO: explain what the save set is for.

       This function either adds or removes the specified window to the client's (your application's) save set.

RETURN VALUE

       Returns an xcb_void_cookie_t. Errors (if any) have to be handled in the event loop.

       If you want to handle errors directly with xcb_request_check instead, use xcb_change_save_set_checked. See xcb-requests(3) for details.

ERRORS

       xcb_window_error_t
		 The specified window does not exist.

       xcb_value_error_t
		 You specified an invalid mode.

       xcb_match_error_t
		 You created the specified window. This does not make sense, you can only add windows created by other clients to your save set.

SEE ALSO

       xcb-requests(3), xcb_reparent_window(3)

AUTHOR

       Generated from xproto.xml. Contact xcb@lists.freedesktop.org for corrections and improvements.

XCB
								    2014-06-10						    xcb_change_save_set(3)