On 30 October 2019 19:00:05 CET, Wolfgang Schuster <wolfgang.schuster.li...@gmail.com> wrote: >Marcel Fabian Krüger schrieb am 30.10.2019 um 18:02: >> Hey, >> >> LuaTeX currently supports only a very special kind of Type 3 fonts: >> They are generated for traditional TeX bitmap fonts. While this used >to >> be the most common use case for Type3 fonts, the fully general >concept >> of these fonts has recently been reinvented under the name of SVG >fonts >> (and friends). While they can be implemented in LuaTeX to some degree >> through virtual fonts/node processing etc., converting them into >"real" >> Type 3 fonts in the PDF file would give some important advantages: >Such >> fonts are called like other fonts and can get tounicode vectors, >> allowing better accessibillity and better Copy&Paste behaviour. Also >> viewers generally treat them as text instead of graphics, allowing >> proper interaction with features of PDF viewers. >> Beside from supporting SVG fonts, it also allows to use general >MetaPost >> fonts which might not be easily convertable into normal formats for >vector >> fonts. >> >> As far as I can tell there used to be an implementation of general >Type >> 3 fonts for pdfTeX which was dropped in LuaTeX, mostly because it was >> never actually used. My suggested new implementation is a bit more >> flexible by not requiring external files defining the font but >instead >> generating each font character based on individual node lists for >every >> glyph. One way to make this work would be to add a special `format` >> named e.g. `node` (given that `type3` is already used to imply bitmap >> fonts) and add a field `node`/`list`/`head` to the character table >> referencing a node list which should become the font glyph. >> The detaily like bounding box calculations etc. would be the >> responsibility of the Lua code loading the font. >Take a look at chapter 14: >http://www.pragma-ade.nl/general/manuals/luametafun.pdf
I am aware that this can easily be implemented in luametatex, but I think that this functionality is important enough that it also should be supported in LuaTeX. -- Marcel > >Wolfgang _______________________________________________ dev-luatex mailing list dev-luatex@ntg.nl https://mailman.ntg.nl/mailman/listinfo/dev-luatex
