[cairo] Scrolling/Panning Demo -- howto increase speed
mail at ssalewski.de
Sat Dec 11 10:00:58 PST 2010
On Sat, 2010-12-11 at 18:45 +0100, Tobias Hoffmann wrote:
> Stefan Salewski wrote:
> > As expected scrolling and panning is not really fast, [...]
> > Is there an not too complicated way to increase performance
> On C/C++ I have used Gdk::Window::scroll(dx,dy) which moves the already
> visible portion of the screen and invalidates (triggers an expose) for
> the remaining parts. And don't forget about
> Gdk::Window::set_debug_updates() which nicely visualizes this.
Yes -- that seems to be what I was looking for.
Indeed I missed that function, I was only looking for cairo related
functions. But of course, it should be fine to let Gdk do the scrolling
and use cairo only for painting the damaged areas.
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