Re: Gtk+ / DirectFb / Pango performance

["Sean Kelley" <sean sweng gmail com>]

Have you considered Gtk+ 2.6 for your embedded design?  Instead of
DIrectFB, which is rather rough around the edges, why not use a
tinyx-server like kdrive?   I am using it in a design on an XScale.

On 5/17/06, Clif Swiggett <Clif synapse com> wrote:
> Hi All  -
> I'm hoping I can get some guidance here.
>
> I'm cross compiling Gtk+ (latest CVS) to an ARM9 board.
> DirectFB performance is great - I can fill the screen with text using
> DirectFB font rendering and it appears instantaneous to a user.
>
> However, Gtk / pango font rendering is incredibly slow.  If I show a Gtk
> Window with a handful of labels, the text dribbles onto the screen.
>
> The bulk of the time is spent in pango_renderer_draw_layout_line (the
> first call is very slow - subsequent calls are much faster) and
> pango_renderer_deactivate.  Since Gtk calls these every time it draws a
> label, the performance overhead is crippling.
>
> Does anyone have any recommendations for speeding this up?
>
>
> - Clif
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