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Re: Extracting approximate outlines from FT ?

From: Werner LEMBERG
Subject: Re: Extracting approximate outlines from FT ?
Date: Sat, 25 Apr 2020 21:53:43 +0200 (CEST)

> In
> it is explained that outside curves go clockwise. Does that hold for
> other font types too? (PFA, OTF?)

PostScript flavoured glyphs like PFA or OTF[*] have the opposite
orientation.  You can easily check whether the used FreeType driver
for a font is 'truetype':

  FT_Face face = Get_FT_Face_For_Current_Font(...);
  FT_Module module;

  module = &face->driver->root;
  if (!strcmp( module->clazz->module_name, "truetype"))
    ... we have a TrueType font ...


[*] To be more precise: OpenType fonts can either use TrueType or
    PostScript outlines.  The former has a 'glyf' table in the font's
    SFNT data structure, the latter 'CFF' or 'CFF2' table.

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