97 lines
2.4 KiB
JavaScript
97 lines
2.4 KiB
JavaScript
const { Ot } = require("ot-builder");
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const Point = require("../../support/point");
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class NamedGlyphStore {
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constructor() {
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this.m_mapping = new Map();
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}
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declare(name) {
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const g = new Ot.Glyph();
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g.name = name;
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this.m_mapping.set(name, g);
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}
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query(name) {
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return this.m_mapping.get(name);
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}
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decideOrder() {
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const gs = Ot.ListGlyphStoreFactory.createStoreFromList([...this.m_mapping.values()]);
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return gs.decideOrder();
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}
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fill(name, data) {
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const g = this.query(name);
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if (!g) return;
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g.horizontal = { start: 0, end: data.advanceWidth };
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if (data.references && data.references.length) {
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this.fillReferences(g, data);
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} else if (data.contours && data.contours.length) {
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this.fillContours(g, data);
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}
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}
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fillReferences(g, data) {
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const gl = new Ot.Glyph.GeometryList();
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for (const ref of data.references) {
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const target = this.query(ref.glyph);
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if (!target) continue;
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const tfm = Ot.Glyph.Transform2X3.Translate(ref.x, ref.y);
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gl.items.push(new Ot.Glyph.TtReference(target, tfm));
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}
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g.geometry = gl;
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}
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fillContours(g, data) {
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const cs = new Ot.Glyph.ContourSet();
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for (const c of data.contours) {
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const c1 = [];
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for (const z of c) {
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c1.push(
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Ot.Glyph.Point.create(
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z.x,
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z.y,
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z.type === Point.Type.Quadratic
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? Ot.Glyph.PointType.Quad
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: Ot.Glyph.PointType.Corner
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)
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);
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}
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cs.contours.push(c1);
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}
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g.geometry = cs;
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}
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}
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module.exports = convertGlyphs;
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function convertGlyphs(gsOrig) {
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const sortedEntries = Array.from(gsOrig.indexedNamedEntries())
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.map(([j, gn, g]) => [j, gn, queryOrderingUnicode(gsOrig, g), g])
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.sort(byRank);
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const gs = new NamedGlyphStore();
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const cmap = new Ot.Cmap.Table();
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for (const [origIndex, name, uOrd, g] of sortedEntries) {
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gs.declare(name);
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const us = gsOrig.queryUnicodeOf(g);
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if (us) {
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for (const u of us) {
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if (isFinite(u - 0) && u) {
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cmap.unicode.set(u, gs.query(name));
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}
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}
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}
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}
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for (const [origIndex, name, uOrd, g] of sortedEntries) gs.fill(name, g);
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return { glyphs: gs, cmap };
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}
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function queryOrderingUnicode(gs, g) {
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const us = gs.queryUnicodeOf(g);
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if (us && us.size) return Array.from(us).sort((a, b) => a - b)[0];
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else return 0xffffff;
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}
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function byRank([ja, gna, ua, a], [jb, gnb, ub, b]) {
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return (
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(b.glyphRank || 0) - (a.glyphRank || 0) || (ua || 0) - (ub || 0) || (ja || 0) - (jb || 0)
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);
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}
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