> > What target hardware do you have? Is it something fairly standard?
> > For example, getting it to work on top of an OMAP device like a
> > beagleboard is an easy "Just Works out of the box" type of thing.
> >
> 
>       My hardware is ARM9 400MHz CPU with 32MB ram. However, 
> only about 12MB
> are free for used. I have tried to run a mini gtk program on Directfb.
> It takes up about 18MB already........ And what I observe on PC, X
> program is huge. I admit that X itself is small (KDrive claim 
> it can run
> on 4MB). However, X has bad behavior that its memory usage will be
> easily jump to several times larger even it runs a very small 
> program....

I'd still suggest that you try it on your hardware. It is probably as
easy (maybe even easier) to set up than the DirectFB stuff, and should
Just Work.

Remember that a lot of the "bad behaviour" that you ascribe to X is
often not X per se but the application's use of X.

Also, remember that the allocation of memory, on systems with lots of
it, is such that both X and the underlying OS favour utilising lots of
memory to cache things for performance reasons.

In a memory constrained system, you will of course not do that, so the
memory footprint that you see on your desktop machine is not a
meaningful representation of what KDrive would do on your target
hardware.

The only way to know for sure is to try.

>       Maybe I should try out DirectFB+FLTK first and see if 
> it is usable in my constraint first.

I see Nikita has already posted a response about DirectFB, who I think
is the best person to help you with that.

If it were me, I'd also (first) give Kdrive a test to see how well that
worked, since that would allow you to use a "stock", supported, fltk
build.
If you go the DirectFB route, you will be treading exciting new
ground....!





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