bugThe FreeType Project - Bugs: bug #55001, incorrect hinting of scaled...


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bug #55001: incorrect hinting of scaled subglyphs

Submitted by:  Werner LEMBERG <wl>
Submitted on:  Sat 10 Nov 2018 08:12:29 AM UTC  
Severity:  3 - Normal Item Group:  Incorrect behaviour
Status:  Confirmed Privacy:  Public
Assigned to:  Werner LEMBERG <wl> Open/Closed:  Open
Planned Release:  None

Fri 15 May 2020 01:41:01 PM UTC, comment #1: 

I've observed this error. A font I made to reference font glyphs four times appears scaled in FreeType, but appears glitched in GDI. Fixing this issue would make FreeType correctly appear glitched as well. This of course also affects any renderer that relies on FreeType's hinter.

- <_194785>
Sat 10 Nov 2018 08:12:29 AM UTC, original submission:  

In composite glyphs, subglyphs must be first scaled then hinted, as explicitly specified in the specification.

FreeType currently handles scaled subglyphs the wrong way: It first hints, then scales.

Cf. https://github.com/googlei18n/noto-fonts/issues/1265#issuecomment-435703740

Werner LEMBERG <wl>
Project AdministratorIn charge of this item.


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