Re: Heads-up: Potentially breaking changes to the GDK drawing model pushed

[Jean Brefort <jean brefort normalesup org>]

Sure that it would help us if the the background was not cleared (I now
remember that we avoided using them because of this feature).

Thanks,
Jean

Le samedi 21 juin 2014 à 09:56 -0400, Jasper St. Pierre a écrit :
> Yes, that should work. Make sure to test it, though, as
> begin_paint_rect / begin_paint_region currently clears the specified
> rect/region to the background set on the GdkWindow. If passing a more
> exact region is too much of an annoyance, I should be able to also
> change this without breaking too much so that the clear to background
> only happens on expose events.
>
>
>
> It's difficult to balance the requirements of everybody.
>
>
>
> On Sat, Jun 21, 2014 at 9:44 AM, Jean Brefort
> <jean brefort normalesup org> wrote:
>         Both abiword and gnumeric do something like:
>         
>         cr = gdk_cairo_create(win);
>         ...do some drawing
>         then relase the cairo.
>         
>         Will this still work if we use
>         
>         gdk_window_begin_paint_rect (win, rect);
>         cr = gdk_cairo_create (win);
>         ...do some drawing
>         gdk_window_end_paint (win);
>         
>         ?
>         
>         
>         
>         Le samedi 21 juin 2014 à 09:33 -0400, Jasper St. Pierre a
>         écrit :
>         > Can you two explain exactly what Abiword and Gnumeric are
>         doing, what
>         > APIs they're using and why and so on? We're trying to come
>         up with a
>         > solution that will work well under both X11 and Wayland.
>         >
>         > As I said, if it's a really bad break and would require
>         intensive
>         > changes to apps, I'll revert the patches. This is exactly
>         why I sent
>         > out the mail.
>         >
>         >
>         > On Sat, Jun 21, 2014 at 9:18 AM, Jean Brefort
>         > <jean brefort normalesup org> wrote:
>         >         This will break abiword as well.
>         >
>         >         Jean
>         >
>         >         Le samedi 21 juin 2014 à 08:02 -0400, Morten
>         Welinder a
>         >         écrit :
>         >         > Argh!
>         >         >
>         >         > Will the stream of ABI changes never end?
>         >         >
>         >         > Gnumeric uses this to provide a walking-ant cursor
>         large
>         >         selected areas -- areas
>         >         > too big for processing in the normal paint loop.
>         >         >
>         >         > Morten
>         >
>         >
>         > --
>         >   Jasper
>         >
>         
>         
>         
>
>
>
> -- 
>   Jasper