Re: [ft] [EXTERNAL] RE: get all glyphs

[Dryden, Thomas]

Laco/Armin,

Yes - I did the following iteration over all charmaps. It yielded 3607 'chars'. 
Still, 10x less than expected. It occurred to me that maybe the 'chars' are 
used together to make different Chinese characters?

-Thomas

    for (int i=0; i<Face->num_charmaps; i++)
    {
        gindex = 0;
        FT_Set_Charmap(Face, Face->charmaps[i]);
        charcode = FT_Get_First_Char(Face, &gindex);
        while ( gindex != 0 )
        {
            fprintf(fh, "count: %d, charcode: 0x%X, gindex: %d\n", count, 
charcode, gindex);
            printf("count: %d, charcode: 0x%X, gindex: %d\n", count, charcode, 
gindex);
            charcode = FT_Get_Next_Char( Face, charcode, &gindex );
            count++;
        }
    }

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Sent: Tuesday, April 9, 2019 8:19 AM
To: address@hidden; Dryden, Thomas <address@hidden>; address@hidden
Subject: RE: [ft] [EXTERNAL] RE: get all glyphs

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Good point Armin,

If you go trough every charmap in FT_Face then you should be able iterate all 
glyphs. And this is definitely faster than using FT_Load_Glyph. In rare cases 
there can be glyphs in font which are not referenced by any charmap, but then 
many program cannot work with it.

Best
- Laco.

-----Original Message-----
From: address@hidden <address@hidden>
Sent: Tuesday, April 9, 2019 11:53
To: 'Dryden, Thomas' <address@hidden>; address@hidden; address@hidden
Subject: RE: [ft] [EXTERNAL] RE: get all glyphs

Hi Thomas,

have you tried to iterate over every charmap, as Laco suggested?  Basically 
keeping your loop but putting something like that around it:

```
for ( int c = 0, cc = face->num_charmaps; c < cc; ++c ) {
  FT_Error  err = FT_Set_Charmap( face, face->charmaps[c] );
  if ( !err ) {
    // ... your loop from below ...
  }
}
'''

Also mind Laco's note about `FT_Load_Glyph';  you don't want to load anything 
if you don't have to.

Best
Armin

> I did try FT_Load_Glyph as well.  The only problem is, I also need to
> know
the
> character code. I don't know how to get the character code from the slot??
> =Thomas
>
>> Note: Consider use FT_Load_Glyph to enumerate all glyphs, i tis slow.
>>
>> - Laco.
>>
>>> Hello Thomas,
>>>
>>> From documentation about FT_Get_First_Char:
>>>
>>> Return the first character code in the current charmap of a given
>>> face,
...
>>>
>>> This mean you get only trough glyphs in current charmap. Try use
FT_Load_Glyph.
>>>
>>> - Laco.
>>>>
>>>> I'm attempting to extract all glyphs from a TTF in order to create
>>>> a
table
>>>> of each glyph's width. I'm using a Chinese TTF, that reports it has
36k+
>>>> glyphs (via face->num_glyphs). When I use the following code, I
>>>> only
get
>>>> 497 glyphs. Clearly, I'm doing something wrong... Any ideas?
>>>>
>>>> Thanks,
>>>> -Thomas
>>>>
>>>> charcode = FT_Get_First_Char( Face, &gindex ); while ( gindex != 0
>>>> ) {
>>>>     printf("count: %d, charcode: 0x%X, gindex: %d\n", count,
>>>> charcode,
gindex);
>>>>     charcode = FT_Get_Next_Char( Face, charcode, &gindex );
>>>>     count++;
>>>> }


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