[Xcb] Porting the rest of the X.Org apps to xcb
Vincent Torri
vtorri at univ-evry.fr
Fri Jul 16 07:24:04 PDT 2010
On Fri, 16 Jul 2010, Alan Coopersmith wrote:
> Given what I learned on the xwininfo port I took a quick pass across
> the rest of the X.Org app/* modules to see what it would take to port
> each to xcb.
>
> I am *not* volunteering to do these all, just offering some insight into
> which are going to be easier/harder/not possible and hoping that others
> will step up to do some of these.
>
> At least at a quick glance, I think these could be fairly straightforward
> to port to XCB, though whether it's worth the effort for all of them is
> debatable:
>
> backlight, ico, xcmsdb, xcompmgr, xdriinfo, xhost, xinit, xkill,
> xrandr, xrdb, xrefresh, xrestop, xsetroot, xshowdamage, xstdcmp,
> xvinfo, xwd, xwud
Arnaud Fontaine wrote an XCB-based composite manager. Is it necessary to
port xcompmgr ?
> rendercheck (Xrender extension test suite - would probably want to
> leave #ifdef'ed so it can still be used to test the
> Xlib-based libXrender API)
>
> These require support for extensions not yet ported to XCB:
Xinput is ported to XCB. It's just not installed by default. On the other
hand, i don't know its status (that is: why is it disabled by default ?)
Vincent
> XKB: setxkbmap, xkbcomp, xkbevd, xkbprint, xkbutils, xset
> Security: xauth
> DBE: xdbedizzy
> XF86dga: xf86dga
> XF86vm: xgamma
> Xinput: xinput, xsetmode, xsetpointer
>
> and then there's xdpyinfo, which uses all of these not yet in XCB:
> xf86vm, xf86dga, xf86misc, Xinput, dmx
>
> These depend on libXft, and I'm not sure what to do about that in a xcb
> port:
>
> x11perf (plus like rendercheck, we'd still want to be able to use it
> to test libX11 for a while)
>
> These depend on XKeysymToString or XStringToKeysym, which last I remember
> was waiting for someone to create a libxkeysym to do the mappings:
>
> fstobdf, xlsfonts, xmodmap
>
> These depend on libXt and/or libXaw, which use Xlib types like Display
> in their API, so a pure-xcb-port is not possible without first porting to
> another toolkit (which doesn't seem worth the effort for most of these,
> since there already are similar programs for other toolkits, or doesn't
> make sense since they're specifically for Xt resource management):
>
> Xt resource tools: appres, editres, listres, viewres
>
> beforelight, bitmap, oclock, proxymngr, smproxy, twm
> xbiff, xcalc, xclipboard, xclock, xconsole, xditview,
> xdm, xedit, xeyes, xfd, xfindproxy, xfontsel, xgc, xload,
> xlogo, xmag, xman, xmessage, xmh, xmore, xsm, xvidtune
>
> These are non-X client utilities that don't use libX11 at all so have no
> calls to convert to xcb:
>
> font file utilities: bdftopcf, fonttosfnt, mkfontdir, mkfontscale
> font server utilities: fslsfonts, showfont, xfs, xfsinfo
> misc utilities: constype, iceauth, rgb, rstart, sessreg, xfwp
>
> Special cases:
>
> lbxproxy - calls xtrans directly since it's a X11 proxy, plus, it's
> LBX, so it's just special anyway. (Also, since Xorg no
> longer supports LBX, not widely used anymore.)
>
> luit - only uses locale.aliases file from libX11, doesn't even need
> to link to libX11.
>
> mkcomposecache - helper program to build libX11's input method Compose
> table caches - a non-libX11 version makes no sense.
>
> xcursorgen - mostly uses libXcursor, uses libX11 only for
> XReadBitmapFileDatabitmap, never calls XOpenDisplay
>
> xev - mostly very simple, except for the interaction with libX11
> input methods to display what strings would be input by key events
>
> xpr - only uses XInitImage from libX11
>
> xprop - needs better helpers for property encodings (like the discussion
> during the xwininfo port), otherwise should be straightforward
>
> xrx - Mozilla plugin
>
> xscope - uses xtrans directly to proxy X protocol, printing it on the
> way for debugging - though it would be nice if extension decoders
> could be xcb-generated instead of handcoded
>
> --
> -Alan Coopersmith- alan.coopersmith at oracle.com
> Oracle Solaris Platform Engineering: X Window System
>
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>
>
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