Let me add some supplements: * bytecode interpreter (BCI) in FreeType (FT) used to have sw patent issue so disabled by default * Now the patent is expired so enabled by default since FT 2.4 (http://www.freetype.org/patents.html) * BCI is used for hinting (grid fitting) to display creep glyphs * auto-hint/autofit is a walk-around to fine tune on rendering to have similar result to "native" hint (hint w/ BCI) * Tricky fonts use BCI instructions to place (re-use) radical strokes to save space (instead of each time outlining the whole glyph) * Tricky fonts are unfortunately widely used in official and educational documents for they are shipped w/ windows. * autohint/autofit can't "invent" the position/scaling info for tricky fonts and results in "broken" glyphs. (sorry it's hard to tell if you don't understand chinese characters as all strokes are there, just in wrong position) * autohint/autofit is exclusive to BCI hinting and must be disabled for tricky fonts. * libpoppler needs to be compiled against "FT with BCI enabled" to be able to render tricky fonts correctly. (it's then a distro issue instead of individual packages)
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is a bug assignee. https://bugs.launchpad.net/bugs/209145 Title: Evince couldnot display chinese pdf files -- desktop-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
