Re: [EXTERNAL] Re: Problem with flagging font as 'tricky'

[suzuki toshiya]

Ahh... Werner, is it considerable idea for FreeType to add a hardwired 
assumption to recognize the randomization prefix of the fonts embedded in PDF?

Regards,
mpsuzuki

On 2021/02/12 17:31, Justyna Wawrzynska wrote:
> Hi Werner,
>
> Thank you for quick response. To be more precise, my case is PDLCJH+OCR-A font. 
> This is incremental font build of OCR-A font. Free type flags it as tricky.
>
> BR,
>
> Justyna
>
> -----Original Message-----
> From: suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
> Sent: Friday, February 12, 2021 2:06 AM
> To: Werner LEMBERG <wl@gnu.org>; Justyna Wawrzynska 
> <justyna.wawrzynska@bluecrestinc.com>; Roy Tam <roytam@gmail.com>
> Cc: freetype-devel@nongnu.org
> Subject: [EXTERNAL] Re: Problem with flagging font as 'tricky'
>
> Dear Werner, Justyna and Roy,
>
> "DLC" was introduced by the request from Mr. Roy Tam,
>
> https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.com%2Fv3%2F__https%3A%2F%2Fgitlab.freedesktop.org%2Ffreetype%2Ffreetype%2F-%2Fcommit%2F0ed9fef032641c30d0398d98a01b69eca1c15224__%3B!!GXa4NB5MBjHR!GhS45UM8ehm31_wdZY6W6qbgdu5gKwZRk5MJ738vZwccn05k2yyj_H-xn3c1sjyGMskkFKv2UNMC%24&amp;data=04%7C01%7Cjustyna.wawrzynska%40bluecrestinc.com%7C7cda724ec08348f84e2b08d8cef26873%7C8310f036fe8d4702a1e0177e9320227c%7C0%7C0%7C637486887837571500%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=gnyl5InB9EGayRRkEtGJHTH3h1GFVohpDlEuqXtULQ8%3D&amp;reserved=0
>
> The assumed font file*s* were dlctt-m7.ttf and dftt-f5.ttf. Revisiting the changeset, using 
> "DLC" prefix in the deny list is slightly too greedy idea to catch all Dynalab fonts, I 
> feel. Also it could be slightly odd to understand the situation as "2 different fonts produced 
> by same company have same family name", because it means that the customer cannot use these 2 
> fonts at the same time. Mr. Roy, do you have more detailed info to identify the fonts precisely?
>
> Regards,
> mpsuzuki
>
> On 2021/02/12 1:44, Werner LEMBERG wrote:
> > Hello Justyna,
> >
> >
> > > Before flagging the font as 'tricky' you are checking its name and
> > > comparing it with the trick_names table defined in ttobjs.c file.
> > > This causes that some fonts which aren't tricky are also flagged and
> > > as a result we can't use autohinting on it.
> >
> > What names are you talking about?
> >
> > > The main problem cause the fonts having prefixes in its names (like
> > > incremental fonts) and "DLC" in the trick_names table.  Is there any
> > > chance to change this method or even change the "DLC" to "DLCMing"
> > > and "DLCFong"?
> >
> > Certainly.  The more details you give on the font names you are going
> > to use (or which are already used by you), the finer we can adjust the
> > filter.
> >
> >
> >       Werner
>
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