On Fri, 04 Jul 2008 12:33:57 -0400
Keith Williams [off-list ref] wrote:

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.

I don't know DirectFB. I am not sure if the DirectFB uses the frame buffer
acceleration or its own. 

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.

Please do simple test: give "time clear" command from the command line.

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

AFAIK, the fbset tool uses the obsolete FB_ACCELF_TEXT flag. 
If your driver does not set this flag and does not use it you won't
see any difference.

This is why I don't believe that the acceleration is being picked-up.

The only sure way is to put printk inside the fillrect function and
watch if it appeared in the dmesg output. The "clear" command
is good at useing the fillrect acceleration.

Regards,
Krzysztof


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