[Cairo] AA-Artifacts during/after gameoflife
christof at petig-baender.de
Wed Nov 19 01:02:00 PST 2003
Owen Taylor schrieb:
> On Tue, 2003-11-18 at 13:10, Christof Petig wrote:
>>What about semi transparent widgets? I was under the impression that
>>this needs a client side rendering library for gdk (which is what cairo
>>can do). Semi transparent toplevel windows are a different problem
>>(solved by keith's X server) but the current gdk implementation uses a
>>lot of subwindows (which might also get semitransparent under said
>>server without needing cairo?).
> There aren't many subwindows in GTK+ - the only widgets with
> Input/Output subwindows are:
> - Widgets that scroll (Viewport, TextView, TreeView)
And HandleBox IIRC (though this one does not scroll).
> - Entry (I had concerns about breaking input methods by not giving
> each entries it's own widget)
So making an Entry an InputOnly Widget in 2.3 will fix this, won't it?
> - Menubar (this one slipped through the cracks)
> Any other widget can be made semi-transparent simply by drawing
> semi-transparently. With current GDK API's, the only semi-transparent
> drawing api is gdk_draw_pixmap().
So IIRC I can not yet say that a Toolbar has "20% opaque white" as it's
background color or a Label has "80% opaque black" foreground color.
This would require decent gdk support which is not planned before cairo
is integrated into gdk.
Is this correct? (should we cc gtk-devel?)
But I read in your post that semi transparent backgrounds are only
possible using images/pixmaps not GdkColors.
> Entries will have to weight for the COMPOSITE extension; can't go
> window => no_window and retain compatibility.
But input only windows should give the desired effect now, shouldn't they?
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