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Re: [ft] Bytecode hinter producing bad results, seems to be a regression


From: Werner LEMBERG
Subject: Re: [ft] Bytecode hinter producing bad results, seems to be a regression
Date: Sat, 01 Jan 2011 15:43:18 +0100 (CET)

> check your font whether my assumption is correct.  I only have
> `Helvetica Neue LT Pro 65 Medium' version 001.000 (from 2003), but
> this is an OpenType font with CFF outlines.

Accidentally, I've also found `Helvetica Neue LT Com 65 Medium' (2.01
from 2006).  My assumption was correct: The `gasp' table of this font
asks for monochrome rendering in the range 9-15ppem.

However, I see strange hinting for certain ppem values.  For example,
the monochrome version of `h' at 11ppem misses the left stem, or the
`C' at 10ppem lacks the middle part (see attached image).  I *can't*
believe that this is FreeType's fault, given that those strange
rendering results are mainly due to DELTA instructions which shifts
certain points at certain ppem values by a fixed amount.  Something's
is going on here, and it would be interesting to know more details.

Do you have a chance to check monochrome rendering of this particular
font on Windows?


    Werner

PNG image


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