def ttf.advance

gralha-truetype@0.1.0.1 · font.bend:139

import Base
import gralha-text-scan@0.1.0.1/scan.bend as U
import gralha-bytes@0.1.0.1/bytes.bend as Bin

139def ttf.advance(+b: Bin.Bytes, +f: TTFont, +gid: U32) -> F32:
140  TTFont{glyf, loca, long, hmtx, metrics, glyphs, units} = f
141  +m = metrics
142  +i = U.choose(U32, U32.is_lt(gid, m), gid, (m - 1 : U32))
143  U32.to_f32(ttf.u16(b, (hmtx + i * 4 : U32)))