Re: Cairo branch.

["Jan D." <jan.h.d@swipnet.se>]

Hi.

> 12 feb 2015 kl. 17:04 skrev Eli Zaretskii <eliz@gnu.org>:
> 
>> Date: Thu, 12 Feb 2015 16:01:11 +0100
>> From: "Jan D." <jan.h.d@swipnet.se>
>> Cc: emacs-devel@gnu.org
>> 
>> YAMAMOTO Mitsuharu made the patch to demonstrate printing, so that is 
>> new (see x-print-frames-dialog or the Printing section in xfns.c).
>> 
>> Otherwise it is just a step to keep up with the times, i.e. server side 
>> (as in X11 server) rendering is going away as it seems.  So Emacs must 
>> at some point develop client side (cairo) rendering.
> 
> Is the intent to use Cairo alone, or also use Pango?

Cairo alone.  We use the normal font backend stuff, there is a new one for cairo (ftcrfont.c), based on the Freetype backend (ftfont.c).

> 
> If the latter, then one problem we'd need to figure out is what to do
> with bidirectional display, since AFAIR Pango does its own reordering.
> 
> Another interesting issue is whether we want to use Cairo on Windows
> as well, and eventually drop the w32-specific display back-end.

You have to separate the event and system interaction from the rendering in w32, but also in the X backend so to have a pure resuable cairo rendering code base.  Right now its all kind of mixed in.

	Jan D.