Re: Fwd: regarding animated mng support in gtk for directfb

[Dominic Lachowicz <domlachowicz gmail com>]

Also, you could write a GdkPixbufLoader plugin, so that all GTK+ apps
can view MNGs. It shouldn't be too difficult.

On Tue, Mar 10, 2009 at 11:52 AM, Sven Neumann <sven gimp org> wrote:
> Hi,
>
> On Sat, 2009-03-07 at 10:37 +0530, Monil Parmar wrote:
>
>> I am using GTK-2.12.12.
>> I have compiled mng lib from http://sourceforge.net/projects/libmng/ .
>> The test application, I have used for  X11 with linux.mng is at
>> libmng-1.0.10/contrib/gcc/gtm-mng-view .
>> gtk-mng-view is a sample gtk based application to view mng.
>> I could able to see linux.mng with animation effect.
>>
>> But when I try to run the same source code(gtk-mng-view) for
>> GTK/DirectFB only 1st frame it shows.
>
> I've had a look at this and the problem is clearly in the gtk-mng-view
> code. The example code there draws outside the expose handler. This is
> something that you should never do. It may work for GTK-X11 if you are
> lucky, but it's not supported and it definitely does not work if you
> using the DirectFB backend. Simply replace the function
> mng_refresh_callback() in gtk-mng-view.c with the following code and it
> will work just fine:
>
> static mng_bool
> mng_refresh_callback (mng_handle mng_h,
>                      mng_uint32 x,
>                      mng_uint32 y,
>                      mng_uint32 width,
>                      mng_uint32 height)
> {
>  gtk_widget_queue_draw_area (GTK_WIDGET (mng_get_userdata (mng_h)),
>                              x, y, width, height);
>
>  return MNG_TRUE;
> }
>
>
> Sven
>
>
>
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