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Re: [ft-devel] GETVARIATION and GETDATA


From: Werner LEMBERG
Subject: Re: [ft-devel] GETVARIATION and GETDATA
Date: Mon, 18 Jul 2016 06:32:25 +0200 (CEST)

>> 42 was my suggestion to use instead of 17 :-)
> 
> There actually is a way to test this, if you want: under certain
> circumstances, OS X runs the hints.  This is to make the Chinese
> fonts that draw the glyph in their hint instructions to work.  So,
> you can grab one of those and modify to inspect the return value of
> this instruction.

(a) I don't know how OS X identifies such Chinese fonts.  Is it based
    on font names?  Otherwise, if it is based on table checksums only,
    we are out of luck.

(b) The really hard thing is the `inspect' stuff.  Do you have access
    to a TrueType bytecode debugger on OS X that uses the OS X
    bytecode engine?  Otherwise, it would be necessary to do the same
    as my RasterInfo font, namely adding a special digit glyph that
    displays a given value as a number.

Volunteers for (b) are welcome :-)


    Werner



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