JDK passes down the font type : TrueType or Type1 : to the native code.
This is used to determine the curve type returned by the rasteriser.
OTF/CFF support is new in JDK 7. CFF outlines are bicubic bezier like Type 1
whereas TrueType outlines are quadratic
As a result of classifying OTF/CFF fonts as TrueType we use the wrong curve type.