Re: GdkPixbuf rendering to partially obscured window

[Tristan Van Berkom <tristan van berkom gmail com>]

On Mon, 31 Jan 2005 17:03:54 -0500, Carl Nygard <cjnygard fast net> wrote:
> I have a GdkPixbuf rendering to a drawing area, and when the area is
> obscured under another window, the bit under the window never gets the
> image.  I'm drawing vectors to the same window at the same time, and
> they get displayed via backing store just fine.

I'm sure that this has nothing to do with GdkPixbuf (I'm sure you'll have
the same result using gdk_draw_drawable with a Pixmap source).

I've found that when drawing to widget->window (using X backend at least)
the operation is avoided if the area in question is not marked "dirty",
using gdk_window_invalidate_rect/region() might do the trick for you.
Otherwise you might want to consider doing your rendering in two steps,
i.e. compose your image to an offscreen pixmap, and just gdk_draw_drawable
to widget->window in expose events.

Cheers,
                                                     -Tristan