diff options
Diffstat (limited to 'text/shape.h')
| -rw-r--r-- | text/shape.h | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/text/shape.h b/text/shape.h index bd38d96..6e56819 100644 --- a/text/shape.h +++ b/text/shape.h @@ -6,8 +6,8 @@ /* Shaping (docs/design/004-text.md): a run of characters (one script, one * direction) to glyphs and their positions, as HarfBuzz 10 shapes it with - * its default, Arabic, Hebrew, Hangul, Indic, Khmer, Myanmar and Universal - * (USE) shapers, glyph for glyph and unit for unit. + * its default, Arabic, Hebrew, Hangul, Indic, Khmer, Myanmar, Universal + * (USE) and Thai shapers, glyph for glyph and unit for unit. * * What a font's shaping needs travels in a symbol file (its shaping * section), written by the build tool: @@ -48,7 +48,7 @@ enum { VEGA_SHAPING_HEADER = 80, VEGA_PLAN_BYTES = 144, VEGA_STEP_BYTES = 8, VEG VEGA_PLAN_STAGES = 5 }; enum { VEGA_SHAPE_LTR = 1, VEGA_SHAPE_RTL = 2 }; enum { VEGA_SHAPER_DEFAULT, VEGA_SHAPER_ARABIC, VEGA_SHAPER_HEBREW, VEGA_SHAPER_HANGUL, VEGA_SHAPER_INDIC, - VEGA_SHAPER_KHMER, VEGA_SHAPER_MYANMAR, VEGA_SHAPER_USE }; + VEGA_SHAPER_KHMER, VEGA_SHAPER_MYANMAR, VEGA_SHAPER_USE, VEGA_SHAPER_THAI }; /* Plan flags: GPOS runs; mark advances are zeroed after it (by GDEF); glyph * classes come from Unicode (the font has none); the font positions marks * (a 'mark' feature); automatic fractions; the kern table kerns; marks are @@ -71,8 +71,9 @@ enum { VEGA_MASK_USE_RPHF = VEGA_MASK_INIT + 1 }; /* USE: that, and Arab * position by whether they would substitute it. */ enum { VEGA_STAGE_RPHF, VEGA_STAGE_PREF, VEGA_STAGE_BLWF, VEGA_STAGE_PSTF, VEGA_STAGE_VATU }; /* Shaper flags: Indic's font follows the old specification (deva, not - * dev2). */ -enum { VEGA_INDIC_OLD_SPEC = 1 }; + * dev2); Thai's font has no Thai script of its own, so its marks take the + * font's private-use glyphs where it has them. */ +enum { VEGA_INDIC_OLD_SPEC = 1, VEGA_THAI_PUA = 2 }; /* Step flags; pauses, which the shaper tells apart. */ enum { VEGA_STEP_AUTO_ZWNJ = 1, VEGA_STEP_AUTO_ZWJ = 2, VEGA_STEP_RANDOM = 4, VEGA_STEP_PER_SYLLABLE = 8 }; enum { VEGA_STEP_PAUSE = 0xFFFF }; |