eGalax touchscreen calibration

[Markamc]

Those are the values dumped on screen, and not the values inside etc/pointercal file. The ones in the file are different
file contents looks like this

42243 -174 -1212176 -45 25869 -4009392 65536 1280 720

values and equations are

xscale xymix xoffset yxmix yscale yoffset scaler

Xs = (Xt*xscale + Yt*xymix + xoffset)/scaler
Ys = (Xt*yxmix + Yt*yscale + yoffset)/scaler