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Touchscreen subpixel accuracy?
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tjay
2007-12-29 , 00:39
Posts: 9 | Thanked: 0 times | Joined on Nov 2007
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You know, I did some calculations on the X-axis values in sdrman's touchlog.txt, and IIRC, it seems that there's only really about 3 points per pixel of touchscreen resolution. Some pixels have 2 and some have 4. I didn't do any calculations on the Y-axis values though. Seems low when compared to the RAW_DELTA_* values, which _I thought_ were a hint to the accuracy of the device. Perhaps there's a setting to increase sampling resolution etc somewhere. Still, it's better than Windows Mobile devices, which have 2 points per pixels in the X and Y directions, in the API at least.
sdrman says that the pressure data isn't consistent across the screen, so I suppose it won't be good enough for drawing. GIMP will need a different UI to work well on the tablets
Anyway, still haven't got my hands on an N800. I live in Malaysia and the device isn't actually available here. Plus I've never seen anyone walking around with one either. Sigh...
TJ
Last edited by tjay; 2007-12-29 at
00:42
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