Setting lfHeight to a positive value in LOGFONT requests the font
with the given cell height, which is em square size + internal
leading. When setting this to the em square size, it means we
will get glyphs that are actually sized for an em square with
sides that are (emSquareSize - internalLeading). For most fonts,
this was not noticeable, but for some fonts with large internal
leading, the resulting glyphs would be very small.
When setting lfHeight to something < 0 instead, we are selecting
the font with the given character height instead, which is not
including the internal leading.
[ChangeLog][PDF] Fix embedding glyphs from fonts with large
internal leading.
Task-number: QTBUG-43082
Change-Id: Id74cf2279df2062804e9431fe305d803cb0b19d2
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
9f63e2dc0e