[Qt-interest] pdf printer 1200 DPI and font size

[Sylvain Pointeau]

>
> Now that the transform from mm to printer pixels is working OK, converting
> font sizes from points (= 1/72 of an inch) to mm should be straight
> forward.  To correctly measure an individual character, you will need to get
> the character's tightBoundingRect from the QFontInfo.
>

This was what I tried and I made some tests:

font point size = 1 -> result ~ 16.2 mm
font point size = 2.54 -> result ~ 40 mm

so it is somewhere transformed...
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