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Accelerated framebuffer driver

Hello, because the generic VESA framebuffer on Geode-boards runs slowly, I compiled the AMD (Nat.Semi.) framebuffer driver (nsc-kfb-driver-2.7.7.tar.gz) into the kernel. Now I would like to use the accelerated drawing functions (for lines, bitBlt's, filled rectangles...).

May I use the functions which (might be available inside the kernel) or do I have to compile the accelerated functions a second time and to link it to my program file?

What's the correct way to use the advantages of the framebuffer driver?

Thanks an advance, Juergen

Reply to
Jürgen Querengässer
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While searching the net for something completely different a few days ago, I stumbled over this article:

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At first glance, it seems to talk about similar issues, so maybe it is helpful to you..

Cheers

Rob

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Robert Kaiser                     email: rkaiser AT sysgo DOT com
SYSGO AG                          http://www.elinos.com
Klein-Winternheim / Germany       http://www.sysgo.com
Reply to
Robert Kaiser

To take advantage of the the NSC accelerated framebuffer, you've got to call the accelerated ioctls() that the NSC driver supports. They do provide some headers (or they do in the version that I've got) in the galproto.h and some interface source in galfns.c.

This would have to be done in Xfree86 if you're using that, and you'd have to modify the Xserver to take advantage of that. Somewhere on my list of things to do if I ever get time is to modify the stock Xfbdev server to support some of the basic acceleration functions.

If you're using the framebuffer directly, then you can do whatever you want, of course.

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Alex Pavloff - remove BLAH to email
Software Engineer, ESA Technology
Reply to
Alex Pavloff

IMHO, the correct way is to use a standard api like DirectFB

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maybe you can improve the GX1 directfb driver insead of rolling your own one.

clemens

Reply to
Clemens Kirchgatterer

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