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A comment on Apple Pencils don’t draw straight on unauthorized iPad screens. Parent comment

Re:Apple Pencils don’t draw straight on unauthorized iPad sc... by jimkoen on Saturday July 29, 2023 @10:12PM (#36927091)
But realistically this would mean I couldn't use an iPad with it's pen without connecting it to the internet first. I mean how would Apple bake every calibration for every display into all devices, even ones it hasn't even produced yet?
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Re:Apple Pencils don’t draw straight on unauthorized iPad sc... by mwint on Saturday July 29, 2023 @10:21PM (#36927150)
Because the screen was on the device when it was calibrated.
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Re:Apple Pencils don’t draw straight on unauthorized iPad sc... by numpad0 on Sunday July 30, 2023 @01:00AM (#36927976)
It's the display that needs calibration. Pen doesn't know where it is, the screen does. So each complete device or at least the screen needs to have a valid calibration table or a function for raw xy -> calibrated xy.
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