FontMetrics BoundingRect size is incorrect with chinese characters and any higher DPI text

FontMetrics BoundingRect is smaller than font height for chinese characters. Also if screen DPI is higher, it will be smaller for normal alphabet text too.

Steps to reproduce:

• Run the attached program

Observer result:

• Error is shown; bounding rect size is smaller than font height

Expected result:

• Error is not shown

If screen DPI is set higher, it will also break normal alphabet in addition to chinese characters.