63 lines
1.6 KiB
JavaScript
63 lines
1.6 KiB
JavaScript
"use strict";
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const EmptyFont = require("./empty-font.js");
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const buildGlyphs = require("./build-glyphs.js");
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const { buildOtl } = require("../otl/index");
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const { assignFontNames } = require("../meta/naming");
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const { setFontMetrics } = require("../meta/aesthetics");
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const regulateGlyphs = require("../support/regulate-glyph");
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const gcFont = require("./gc");
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module.exports = function (para) {
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const font = EmptyFont();
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const gs = buildGlyphs(para);
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assignFontNames(para, gs.metrics, font);
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setFontMetrics(para, gs.metrics, font);
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const otl = buildOtl(para, gs.glyphs, gs.glyphList, gs.unicodeGlyphs);
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font.GSUB = otl.GSUB;
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font.GPOS = otl.GPOS;
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font.GDEF = otl.GDEF;
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// Filtering
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if (para.forceMonospace && para.spacing == 0) {
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gs.glyphList = gs.glyphList.filter(g => !(g.advanceWidth > para.width));
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}
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// Regulate
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const skew = Math.tan(((font.post.italicAngle || 0) / 180) * Math.PI);
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const glyphList = regulateGlyphs(gs.glyphList, skew);
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// finalize
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const excludedCodePoints = new Set();
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if (para.excludedCodePointRanges) {
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for (const [start, end] of para.excludedCodePointRanges) {
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for (let p = start; p <= end; p++) excludedCodePoints.add(p);
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}
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}
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const { glyf, cmap } = extractGlyfAndCmap(glyphList, excludedCodePoints);
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font.glyf = glyf;
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font.cmap = cmap;
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gcFont(font);
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return font;
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};
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function extractGlyfAndCmap(glyphList, excludedCodePoints) {
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const glyf = {};
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const cmap = {};
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for (let g of glyphList) {
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glyf[g.name] = g;
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if (!g.unicode) continue;
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for (let u of g.unicode) {
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if (!excludedCodePoints.has(u - 0)) cmap[u] = g.name;
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}
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}
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return { glyf, cmap };
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}
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