Re: [gtk-list] Re: REFCOUNTING and Pixmaps with XEvents

[Tim Janik <Tim Janik Hamburg Netsurf DE>]

On Thu, 18 Dec 1997, Owen Taylor wrote:

> 
> Tim Janik <timj@psynet.net> writes:
> 
> > [XCopyArea:]
> > If regions of the source rectangle are obscured and have not
> > been retained in backing store or if regions outside the
> > boundaries of the source drawable are specified, those
> > regions are not copied.  Instead, the following occurs on
> > all corresponding destination regions that are either visi-
> > ble or are retained in backing store.  If the destination is
> > a window with a background other than None, corresponding
>  ^^^^^^^^^
> > regions of the destination are tiled with that background
> > (with plane-mask of all ones and GXcopy function).  Regard-
							^^^^^^
> > less of tiling or whether the destination is a window or a
    ^^^^              ^^^^^^^^^^^^^^^^^^^^^^^^^^             ^
> > pixmap, if graphics-exposures is True, then GraphicsExpose
    ^^^^^^

hm, i think this states otherwise.
you can copy from a pixmap to a pixmap, or even a window to a pixmap,
and in fact this can cause GraphicsExpose events.
    
> > events for all corresponding destination regions are gener-
> 	                       ^^^^^^^^^^^
> > ated.
> > 
> > so in fact, pixmaps *can* receive XEvents.
> 
> GraphicsExpose events are only generated when the destination
> is a window, and they are generated for the destination
> drawable, not the source drawable.
> 
> So I think we are OK,
>                                         Owen
> 

so i think we aren't...

---
ciaoTJ