[directfb-dev] Re: Is is eady to improve / extend 5005 driver

[Antonino Daplas <adaplas@pol.net>]

On Wed, 2003-02-12 at 06:20, Hartmut Van Waregem wrote:
[snip]
> 
> What I need for my application(s) is
> 	- get good resolution (ie. 1280 x 1024 in 16 bits)
> 	- be able to display a small MPEG stream (from a
> file) on the TV output and a Web Page on the VGA
> output at the same time
> 
> I would really appreciate if someone could let me know
> if all this is possible / easy / complex etc. to
> implement based on either directfb and/or the linux
> framebuffer driver.
> 

Adding support for more video memory or for more video modes is best
done at the fbdev layer.  

Supporting multiple/simultaneous display output can be done at the fbdev
or directfb layer.  If you add it to fbdev, you will support more apps, 
but you might have to do it in a nonstandard manner. See matroxfb, it
has a lot of features that is well outside what a "normal" fbdev driver
should do.

Adding this to DirectFB is cleaner, just register a new layer.  The web
page can be displayed to the primary layer, and the MPEG stream to the
secondary layer.  However, you will be limited to apps ported to
DirectFB.

Supporting more drawing functions, special effects, etc is best done in
DirectFB.  

If you have the docs to your hardware, or have working code, adding them
should not be too hard.  

To summarize: just think of the fbdev layer as a means of setting the
video mode, and as a way to provide userland access to video memory,
registers, interrupt services, etc.  Anything falling outside is
userland.


Tony



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