diff -r 578be2adaf3e -r 307f4279f433 Adaptation/GUID-F6E83530-3F8E-5930-8C6C-4D58B675E67A.dita --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Adaptation/GUID-F6E83530-3F8E-5930-8C6C-4D58B675E67A.dita Fri Oct 15 14:32:18 2010 +0100 @@ -0,0 +1,23 @@ + + + + + +Digitizer +Driver TechnologyDescribes how screen coordinates work with the Digitizer Driver. +

The digitizer hardware provides coordinate values that are digitized raw +voltage values. These values are not the same as screen coordinates, which +are based on pixel positions. The digitizer converts the raw values into screen +coordinates and vice-versa.

+

Screen coordinates always have their origin at the top left hand corner +of the screen, but the digitizer has no such constraint - its origin, orientation +and scaling are generally different from the screen coordinate system. This +means that the digitizer needs to be calibrated so that digitizer coordinates +can be translated to screen coordinates.

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