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From: | Parth Wazurkar |
Subject: | Re: [ft-devel] GF's cmap fails |
Date: | Wed, 15 Aug 2018 02:02:55 +0530 |
>> ./ftview -e "" 20 cmr10.600gf
>>
>> only shows `A' glyphs. [...]
>
> Ok. Currently the GF's cmap is like, the first glyph in the file is
> indexed to 0, and so on. So in cmr10.600gf, `ABCD...' appear first
> so they are now indexed from `0,1,2..'
This is correct.
> what happened previously is the glyphs were indexed according to
> their charcode values extracted from the `char_loc' command and this
> was the order `ΓΔΘΛΞΠ...'. I have properly set the encoding values,
Obviously not.
> [...] Other options with `-e' except `-e "" ' are giving proper
> output.
Not at all. They always show the font without any cmap applied,
because there isn't a cmap with the tag you are specifying at the
command line. As soon as you will have implemented a Unicode cmap,
`-e unic' will work also.
> Any specific reason why `-e "" ' is failing so that I can fix it?
Set a break point at `FT_Get_Char_Index' and check the return value.
For example, the function returns 0 if argument `charcode' is zero.
This is wrong, of course, since it should return value 52 (which is
the glyph index of glyph `Γ'). Character code 1 should be mapped to
glyph index 53, code 2 to index 54, etc., etc.
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