Acceleration of 2D operations for kdrive

Daniel Stone daniel at
Sat Feb 3 09:00:43 PST 2007

On Fri, Feb 02, 2007 at 02:04:42PM -0800, Keith Packard wrote:
> For short lines, software is almost always faster; the cost of setting
> up the line and synchronizing with the hardware swamps the benefit of
> using it. For long lines, you fill the screen fast enough that using the
> hardware doesn't make a huge difference. That's why I didn't bother
> adding hardware line hooks.

(FWIW, this is the case on the Nokia 770 and N800.)

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