From a4ca275ad1b5edc15474407e2852f8fe9abaac4e Mon Sep 17 00:00:00 2001 From: eunhhu Date: Mon, 28 Sep 2026 15:52:13 +0100 Subject: Set text in a stack of fonts: each grapheme cluster in the first that has it vega_layout takes fonts in order of preference (VegaFonts). A grapheme cluster goes to the first font that has all its characters (default ignorables aside: shaping hides them); a cluster of Common and Inherited characters stays in the font before it when that one has it, so the spaces between Arabic words stay in the Arabic font; failing that, the first font with its first character, else the first font. Runs split where the font changes too. Positions are in the first font's units, a run's pen scaled as a whole so rounding does not add up. Callers can narrow what a font has (a symbol file holds only the glyphs its codes reach). vega_default_ignorable is shape.c's HarfBuzz 10.2 set, now public. --- text/shape.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'text/shape.h') diff --git a/text/shape.h b/text/shape.h index 9381754..cafa9b4 100644 --- a/text/shape.h +++ b/text/shape.h @@ -128,6 +128,9 @@ bool vega_shaping_open(VegaShaping *, const unsigned char *bytes, size_t size, c void vega_shaping_close(VegaShaping *); /* The font's glyph for a character, or 0. */ uint32_t vega_shaping_glyph(const VegaShaping *, uint32_t code); +/* Default_Ignorable_Code_Point as HarfBuzz 10.2 has it: what shaping hides + * (a zero-width space in its place, or nothing). */ +bool vega_default_ignorable(uint32_t code); /* A shaped glyph, as HarfBuzz gives it: in visual order (left to right), * cluster the index of the first character it came from; each glyph is -- cgit v1.2.3