Re: Emacs and Gnome Canvas

[YAMAMOTO Mitsuharu]

>>>>> On Sun, 18 Jul 2010 11:06:41 +0200, Jan Djärv <address@hidden> said:

>>> BTW, you would have to invent syntactic expose events for X, Xt
>>> and TTY unless you plan to have two display engines.
>> 
>> We don't need to change drawing code for TTY.  It just draws during
>> redisplay as in the current code.

> Then you have to have two redisplay engines.  One that calculates
> dirty regions and updates during expose, and one that updates at
> once.

No.  Notice that neither draw_glyphs nor expose_frame is defined if
HAVE_WINDOW_SYSTEM is undefined.  You replace the former so it
invalidates the updated area, and make the latter more efficient
assuming the existence of double-buffer.

                                     YAMAMOTO Mitsuharu
                                address@hidden