I am using Harfbuzz to layout text using LuaTeX[1]. As part of that, I need to provide LuaTeX with some information about all the glyphs in the font. Strictly speaking, this is more of a job for an Opentype parsing library than a shaping library like Harfbuzz.
However, Khaled Hosny mentioned that I might be able to get the information I need from Harfbuzz itself. It seems the functionality I need should be somewhere in hb-font.h or hb-ot-layout.h I am looking at the API and it is not immediately obvious how I can do the following things with Harfbuzz: 1. Get a list of all the glyph ids in the font 2. Get a list of character to glyph mapping, i.e. the contents of the cmap table. 3 I suppose if I have (1) above I can get a hb_glyph_extents_t for each glyph. I am not sure how to convert it to a value that makes sense to LuaTeX which requires a width, depth and height. 4. How does (3) above work for OpenType fonts with PostScript outlines which apparently do not store the character depth and height in the file. I know LuaTeX’s internal fontloader (based on FontForge) does some calculations to find the bounding box for each glyph. Can Harfbuzz do that too? Is that what this issue[2] talks about? [1]: https://github.com/deepakjois/luatex-harfbuzz [2]: https://github.com/behdad/harfbuzz/issues/249
_______________________________________________ HarfBuzz mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/harfbuzz
