On Wed, 16 Feb 2005, Vojtech Pavlik wrote: >> But can't the app/computer can still do software calibration using the >> hardware-calibrated coordinates instead of raw coordinates? > >It can, but there is information loss in the process.
I don't understand...what information is lost? >> The benefit of hardware calibration (as I see it) is that it's stored in >> the head, so calibration isn't needed if the touch screen is replaced >> (assuming additional software calibration isn't being used). > >I see. That'll only work if you replace both the panel, and the >controller, and the display at the same time. True enough, I've only ever seen integrated panels. What about for a system where the hardware doesn't change but the software is replaced? Either the software calibration would have to be stored and re-used (for each system, if managing multiple systems), or software calibration would need to be re-run... >In the case of software calibration, you also have to replace the config >file. > >I'm not yet convinced that hardware calibration brings enough benefit to >be supported at all. Do you agree that for integrated touch panels, it is better to use hardware calibration, as no software calibration should be needed? >> I guess my opinion essentially is, reporting raw coordinates requires >> software calibration, while reporting calibrated coordinates makes >> software calibration optional... > >We'll have to have software calibration for devices which don't have it >in hardware (and many don't), anyway. Sure, sure, I'm just saying, why _force_ software calibration? If the 3M panel reports only raw coordinates, I _have_ to use software calibration. If it reports hardware-calibrated coordinates, I don't have to use software calibration... -- Dan Streetman [EMAIL PROTECTED] --------------------- 186,272 miles per second: It isn't just a good idea, it's the law! ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
