[Xcb] porting Xft and pango to XCB

[Yang JianJun]

Hi Josh,
     I have updated xftdpy-xcb.c for initializing the client version
number(set major=0,minor=3) when query render verion, according to the one
in xcb-demo/rendertest.c.
    If you still run into segfaults or hangs, maybe some default-values are
wrong,which originally got by XGetDefault. I just hard-code them,you can
modify them to fit yourself then try again.
    Please tell me if you got xft running well on xcb.

--Jianjun


On 10/27/06, Josh Triplett <josh at freedesktop.org> wrote:

> Yang JianJun wrote:
> > On 10/27/06, Josh Triplett <josh at freedesktop.org> wrote:
> >> Yang JianJun wrote:
> >>>         I have ported libXft and Pango to XCB backend, It works well
> >> now.
> >>> For some reasons I picked Pango-1.8 which use Xft for rendering
> instead
> >> of
> >>> cairo. I removed pangox backend in pango, just use pangoxft which
> build
> >>> directly on the lates XCB.
> >>>         The default backend of libXft is X11 ,the configure option is
> >>> "--enable-xcb" if you want to use the XCB backend.The same as xft,
> pango
> >>> also use "--enable-xcb" to enable pangoxft to build on XCB. In
> addition,
> >>> some Xlib functions in Xft have not ported yet,includes XGetDefault
> and
> >>> XRenderQuerySubpixelOrder. I just hard-code the default values.
> >>>         All my work is available from
> >>> http://svn.sourceforge.net/viewvc/gtk-xcb/. Have a look at that and
> let
> >> me
> >>> know if you have more questions.
> >>>         Any suggestion is welcome, thanks!
> >> Wow.  Thanks for working on this!
> >>
> >> I took a look at your Xft port, and tried to get it working on my
> >> system.  I
> >> ran into a few issues:
> >>
> >> * When I try to build libXft, I hit a compilation error:
> >>
> >> gcc -DHAVE_CONFIG_H -I. -I. -I.. -I/usr/include/freetype2
> >> -I/tmp/xcb-util-inst/include -Wall -Wpointer-arith -Wstrict-prototypes
> >> -Wmissing-prototypes -Wmissing-declarations -Wnested-externs
> >> -fno-strict-aliasing -I../include/xcb/Xft -g -O2 -MT xftdpy-xcb.lo -MD
> -MP
> >> -MF .deps/xftdpy-xcb.Tpo -c xftdpy-xcb.c  -fPIC -DPIC -o .libs/xftdpy-
> >> xcb.o
> >> xftdpy-xcb.c: In function '_XftDisplayInfoGet':
> >> xftdpy-xcb.c:152: error: 'XCB_PICT_FORMAT_TYPE' undeclared (first use
> in
> >> this function)
> >> xftdpy-xcb.c:152: error: (Each undeclared identifier is reported only
> once
> >> xftdpy-xcb.c:152: error: for each function it appears in.)
> >> xftdpy-xcb.c:152: error: 'XCB_PICT_FORMAT_DEPTH' undeclared (first use
> in
> >> this function)
> >> xftdpy-xcb.c:153: error: 'XCB_PICT_FORMAT_RED_MASK' undeclared (first
> use
> >> in this function)
> >> xftdpy-xcb.c:153: error: 'XCB_PICT_FORMAT_GREEN_MASK' undeclared (first
> >> use in this function)
> >> xftdpy-xcb.c:154: error: 'XCB_PICT_FORMAT_BLUE_MASK' undeclared (first
> use
> >> in this function)
> >> xftdpy-xcb.c:154: error: 'XCB_PICT_FORMAT_ALPHA_MASK' undeclared (first
> >> use in this function)
> >>
> >> * I think libpixman has actually become deprecated, though I don't know
> >> the
> >>   suggested replacement offhand.  (Possibly this got folded into
> cairo.)
> >
> >
> > No,these errors have nothing to do with libpixman, just because your
> > xcb-util library is a little old. xcb-util has update for "Rename
> > enumerations to coding standard", you should get the latest xcb-util.
> > XCB_PICT_FORMAT_* now defines in xcb_renderutil.h. Can you run it then?
>
> I did indeed have an older xcb-util checkout; good catch.  I updated to a
> current checkout, and your libXft now builds with --enable-xcb.  However,
> when I attempt to run programs against it, it either segfaults or hangs.
>
> I noticed a few warnings while building; looking into them, some relate to
> variables initialized by the commented-out calls to XGetDefault, but I
> also
> noticed this one, in _XftDisplayInfoGet from line 141 of xftdpy-xcb.conward:
>
>    if (info->hasRender)
>    {
>                        int major, minor;
>
>                        ver_rep = xcb_render_query_version_reply
> (dpy,xcb_render_query_version (dpy,major, minor),NULL);
>                        major = ver_rep->major_version;
>                        minor = ver_rep->minor_version;
>
>                        if (major < 0 || (major == 0 && minor <= 2))
>                            info->use_free_glyphs = FcFalse;
>
> This code passes the uninitialized local variables major and minor to
> xcb_render_query_version as the client-supported major and minor Render
> version, before using them to hold the negotiated version.
>
> Also, the point about libpixman deprecation didn't relate to the error
> messages.
>
> - Josh Triplett
>
>
>
>
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