Re: Enabling Hardware acceleration in existing framebuffer driver

[Keith Williams <espian@linuxinstruments.com>]

> The fillrect acceleration is probably used but rarely. 
> One sure way to trigger it is to issue the "clear" command on the 
> frame buffer console. Try "time clear" on a big resolution screen with and 
> without your change. You should see a difference from few to few tens times
> in speed.
>
> The more useful is both the copyarea and imageblit acceleration. Both are
> used during console scrolling (the imageblit is preferred but on some cards
> the copyarea is faster).
>
> I don't know about the DirectFB so I cannot comment.
>
>   

Thanks for the reply.

The fillrect was the simplest to implement.  I agree that the others
will be much higher value.

In DirectFB there are a set of benchmarks that run through all of the
different drawing types including filled rectangles.  That is what I am
using as my baseline.

However, even with the above code I don't see a change in the benchmark
numbers leading me to believe that the acceleration is not being used.

Additionally, fbset shows accel to be false.  Even if I do a "fbset
-accel true", it still reports false.

This is why I don't believe that the acceleration is being picked-up.
Any other ideas with the driver code/things that I am missing?

Thanks,

Keith



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