The Implementation follows closely EmfPlusRecordTypeDrawString.
For each set of characters with the same PosY a TextSimplePortionPrimitive2D
is created.

Change-Id: I04e4d11dc3c4e1e5bd16aefa8e7f00556aa5282b
Reviewed-on: https://gerrit.libreoffice.org/40716Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>