Re: Touch Screen Driver Generic Interface for all Linux SA11x0 platforms.

[Mike Touloumtzis]

On Mon, Jul 10, 2000 at 10:43:55PM +1000, Charlie Flynn wrote:
> 
> This is the structure contains the X and Y pixel coordinates of a
> single touch screen event. It is passed from the driver to the user by
> the read() function.
>

Hi Charlie,

Pixel coordinates won't be enough, in general.  Digitizers used for
handwriting recognition often have much higher resolution than the
LCDs, and the extra information is vital for good handwriting
recognition, particularly for Asian languages.

I've integrated Asian handwriting recognition libraries into OSes
which were not designed with this in mind, and I had to hack things
up get digitizer-resolution coordinates.

Plus, I think it'd be nice to decouple the digitizer API from a
specific screen resolution.

miket


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