Date: Wed Feb 27 2008 - 06:20:04 CST
Andrew wrote on 02/27/2008 10:22:31 AM:
> On 27/02/2008, email@example.com <firstname.lastname@example.org> wrote:
> > correction - for some reason the binary editor modified versions fail.
> > Though the same settings when adjusted in fontforge work.
> All OT font tables have a checksum (see
> <http://www.microsoft.com/typography/otspec/otff.htm>), so if you
> modify the the contents of a table using a binary editor but do not
> recalculate the checksum this may explain why it fails.
Rather than use a binary editor, you could use hackOS2 command from the
command-line font hacking utilities available at
http://scripts.sil.org/FontUtils. These utilities recalculate font
checksums properly. And hackOS/2 touches ONLY the OS/2 table (well, and
the font directory and head table where checksums are stored).
You could also use the OS/2 range bit calculation workbook (an Excel
spreadsheet) from http://scripts.sil.org/OS2RangeBitWorksheet to calculate
the correct UnicodeRange and CodepageRange values for your OS/2 table.
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