Hello Dave,
thanks for your detailed response.
> The initial hintmap feature is relatively new in Adobe's CFF
> rasterizers. It does not exist in CoolType (the rasterizer used in
> Acrobat). CoolType uses an interpreter that handles either Type 1
> or CFF in one pass. But because it does not build an initial
> hintmap, it is able to process Type 1 hint declarations that occur
> mid-charstring. Hint processing in CoolType is very different from
> the rasterizer that Adobe contributed to FreeType.
OK, I thought something along this line. Given that you write
The main motivation for the initial hintmap feature was to deal with
distortions caused by blue zones. [...]
I wonder whether CoolType's hinting engine produces inferior results
compared to the engine Adobe has contributed to FreeType...
> I suppose you could disable the use of the initial hintmap for Type 1
> charstrings only.
If I understand correctly, this is what Ewald started with, and he got
bad results...
> But your two pass approach has the advantage of making the initial
> hintmap feature work for Type 1. As long as the performance impact
> is acceptable, I think this is a good choice.
Thanks for confirmation!
Ewald, have you already done some benchmarks?
Werner
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