Re: Improve DrawingArea drawing

[Paul Davis <paul linuxaudiosystems com>]

On Fri, 2006-03-24 at 09:38 -0400, Daniel Serpell wrote:
> Hi!
> 
> El Fri, Mar 24, 2006 at 11:56:05AM +0000, Josepo Urrutia escribio:
> > I'm trying to draw a dinamicaly generated drawing into a Gtk::DrawingArea 
> > as fast as is possible.
> > 
> > The drawing stuff is done into a Gdk::Pixmap (a lot of draw_segments) that 
> > depents on external information ( a socket, a file... whathever ).
> > On the other hand I've a timer that looks if there is a new image to load 
> > (a new pixmap generated), if the pixmap is generated a queue_draw call is 
> > done.
> > Last in the on_expose_event we simply do a draw_drawable of the pixmap to 
> > the window.
> 
> You should use a Gdk::Pixbuf if you need speed. Then, you can access the
> raw image data and then copy that to the X server.

the problem with using Gdk::Pixbuf is that you also need (or rather,
will want) some set of code to make drawing primitives available.