On Fri, 2012-03-30 at 11:39 +0200, Steve White wrote: > Basic features > ============== > (Background reading: search for "typographic features", "font feature > registry", "layout tag registry".) > > Some features that really ought to be activated most of the time, in > most scripts > * ligatures for Latin and most alphabetic scripts > * localized replacement (based on text language, region) > * pair kerning > * mark positioning
So, I asked Steve to post to the list, so I could dump some experimental code to a wider audience with its context Lets put graphite aside for a moment, its something of a red herring really for a lot of these things. If we look at https://bugs.freedesktop.org/show_bug.cgi?id=31821 I've a patch there that shows that a lot of our woes with otf fonts is probably a simple bug/lack of implementation in out ServerFont::GetTable that it doesn't handle OpenType. freetype does it fine, but we're not using freetype to get the tables, but parsing them outselves. Patch at fdo#31821 a) hacks in using freetype to get the tables (does anyone know if there a freetype api to just get the offset of a table and not a full copy of it ?, we've already mmapped the file so we don't need to copy them) b) hacks in using the icu layout engine for all text, and not just for CTL text. I wonder if its just a performance reason that we have out own "simple" font engine for the non-CTL case ? c) overrides IcuFontFromServerFont::mapCharToGlyph to not filter out the zero width joiner glyphs before applying the gsub table. The icu Indic layout engine doesn't filter it, not sure why the non-Indic ones *do* filter it. So, I reckon we should continue to refactor out font handling code to remove various custom ttf/otf parsing and try and use more of the freetype apis so that LibreOffice gets to know about GSUB etc tables in opentype fonts, and maybe look into removing the simple font layout engine and just use the icu one for all fonts. C. _______________________________________________ LibreOffice mailing list LibreOffice@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/libreoffice