Surface runtime projecting Pure views across pixel, terminal, CLI, and web. http://git.yeowoo.org/vega/atom?h=master 2026-09-28T14:20:08Z 2026-09-28T14:20:08Z eunhhu necpition205@gmail.com 2026-09-28T14:20:08Z urn:sha1:bafb710f0047751e26b87897eaf2a05609708536 The rest of HarfBuzz 10.2's Arabic shaper. Joining types now come from HarfBuzz's own table (Unicode 16, with Syriac's Alaph and Dalath-Rish groups the state machine's last two columns use), the general category deciding where it has none, so Syriac shapes with fin2, fin3 and med2. What stch multiplies is recorded and, after positioning, stretched under the word before it, repeating pieces copied as often as fit. A font with presentation forms but no Arabic features gets HarfBuzz's fallback lookups, which the build tool writes as OpenType and the runtime applies at their pause like any GSUB lookup. The generator now reads HarfBuzz's generated tables through their lookup functions' ranges and offsets: rows whose range starts mid-row have blank cells in front, which the row comments alone miscounted (Arabic Supplement); the Indic table, read again this way, did not change. Noto Sans Syriac, FreeSans's Syriac, Unifont's Arabic and Noto Sans Arabic shape as HarfBuzz does at 3,000 runs a plan; no installed font is refused any more (213 fonts, 1,822 plans). 2026-09-28T14:03:30Z eunhhu necpition205@gmail.com 2026-09-28T14:03:30Z urn:sha1:5788d7e5bd6a26421346d69ae517502527940a0b The USE shaper, from HarfBuzz 10.2's source, for Sinhala, Tibetan, Javanese, Balinese, Mongolian and the rest of its eighty-odd scripts (and Indic fonts with the new dev3-style tags). The syllable machine reads past CGJs and ZWNJs that marks follow; rphf goes on each syllable's first glyphs and records the repha it made, pref records its pre-base glyph, with substitution marks cleared between; a repha moves before the first post-base glyph and pre-base vowels move back. Scripts that join like Arabic take Arabic's forms (Mongolian's free variation selectors their base's), the others join syllable to syllable. Marks lose their advances before GPOS. text/syllabic.py carries HarfBuzz's compressed USE table over as it is, compiles the USE grammar with the others (100,000 random runs against Ragel's machine: no syllable differs), and checks at compile time that the categories syllabic.h names are the machines' own. Noto Sans Sinhala, Javanese, Balinese, Mongolian, Noto Serif Tibetan, FreeSerif's Sinhala and Unifont's five shape as HarfBuzz does at 5,000 runs a plan; all installed fonts (1,748 plans) and 21 Noto fonts too. 2026-09-28T13:49:05Z eunhhu necpition205@gmail.com 2026-09-28T13:49:05Z urn:sha1:60a3c0232bbca8d5d8c1107ab8197d272212ef42 The Indic shaper, from HarfBuzz 10.2's source: syllables found by the Indic machine; each syllable's base consonant, its pre-base matras and reph moved around it and masked for the basic features, applied one at a time within the syllable; then matras, reph and pre-base-reordering consonants placed again by what the features made. Vowel constraints, Indic decompositions and compositions, dotted circles for broken syllables, and per-syllable matching come with it. Plans carry GSUB pauses (steps where the shaper does its part) and the stages of the features the shaper asks whether they would substitute; the runtime answers with each subtable's would_apply, as HarfBuzz does. Masks are now the common ones and each shaper's own. text/syllabic.py reads HarfBuzz's Ragel grammars (Indic, Khmer, Myanmar) and compiles each to a minimal DFA with Ragel's scanner semantics; beside the machines Ragel generated from the same grammars, 100,000 random runs each find no syllable that differs. It also reads HarfBuzz's Indic table (Unicode 16) cell for cell. Every installed font shapes as HarfBuzz does (213 fonts, 1,688 plans); the Indic ones at 20,000 runs a plan (FreeSerif's eight scripts, FreeSans, Unifont's nine without GSUB), and nine new-spec Noto Sans fonts at 5,000.