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  1. Qt
  2. QTBUG-55654

High DPI scaling not working correctly

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    • Icon: Bug Bug
    • Resolution: Out of scope
    • Icon: P2: Important P2: Important
    • None
    • 5.7.0, 5.12.1
    • GUI: Font handling, QPA: Windows
    • None
    • Windows 10, Windows 7, DPI tested from 125% to 175%.

      This is kind of a "regression" from 5.5 due to the incomplete fix of QTBUG-49195. Due to the usage of 

      qRound

      in 

      QWindowsScreen::pixelDensity()

      the high DPI scaling isn't working correctly on non-multiples of 96 DPI. This includes often used:
      120 DPI (125% scaling) - rendered as 96 DPI (100% scaling)
      144 DPI (150% scaling) - rendered as 192 DPI (200% scaling)
      168 DPI (175% scaling) - rendered as 192 DPI (200% scaling)

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            kleint Friedemann Kleint
            evengard Denis Galkin
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              Created:
              Updated:
              Resolved:

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