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Patch GPOS and GSUB tables

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kiliman
2017-09-18 17:33:14 -04:00
parent 8964c6571a
commit f8fdbd34e2
1 changed files with 33 additions and 26 deletions
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index.js
+33 -26
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@@ -29,8 +29,8 @@ async function main() {
await processPatch('names', patchNames, dom);
await processPatch('glyphs', patchGlyphs, dom);
//await processPatch('cmap', patchCmap, dom);
//await processPatch('classdef', patchClassDef, dom);
await processPatch('gpos', patchGpos, dom);
await processPatch('gsub', patchGsub, dom);
await processPatch('hmtx', patchHmtx, dom);
await processPatch('lookup', patchLookup, dom);
await processPatch('charstrings', patchCharStrings, dom);
@@ -111,35 +111,42 @@ async function patchGlyphs(dom) {
setAttribute(dom, '/ttFont/maxp/numGlyphs', 'value', n);
}
async function patchCmap(dom) {
const configDom = await loadConfigAsync('cmap');
const cmaps = xpath.select('/cmap/cmap_format_4', configDom);
async function patchGpos(dom) {
const newGpos = await loadConfigAsync('gpos');
const oldGpos = xpath.select('/ttFont/GPOS', dom, true);
dom.documentElement.replaceChild(newGpos, oldGpos);
}
cmaps.forEach(node => {
const platformId = node.getAttribute('platformID');
const platEncId = node.getAttribute('platEncID');
async function patchGsub(dom) {
const newGsub = await loadConfigAsync('gsub');
// search for cmap_format_4 in target dom
const target = xpath.select(
`/ttFont/cmap/cmap_format_4[@platformID="${platformId}" and @platEncID="${platEncId}"]`,
dom,
true
);
if (target) {
// append all map elements to target cmap_format_4
const maps = xpath.select('map', node);
maps.forEach(child => target.appendChild(child));
// loop through Substituion/Ligature nodes and remap chars
remap(newGsub, dom, '//Substitution', 'out');
remap(newGsub, dom, '//Ligature', 'glyph');
const oldGsub = xpath.select('/ttFont/GSUB', dom, true);
dom.documentElement.replaceChild(newGsub, oldGsub);
}
const remap = (patchDom, cmapDom, path, attr) => {
const cmap = [];
let nodes = xpath.select(path, patchDom);
nodes.forEach(n => {
const out = n.getAttribute(attr);
if (out.startsWith('uni')) {
// get cmap entry
const code = '0x' + out.replace(/uni0*/g, '').toLowerCase();
let name = cmap[code];
if (!name) {
const map = xpath.select(`/ttFont/cmap/cmap_format_4/map[@code="${code}"]`, cmapDom, true);
name = map == null ? out : map.getAttribute('name');
cmap[code] = name;
}
n.setAttribute(attr, name);
}
});
});
}
async function patchClassDef(dom) {
const configDom = await loadConfigAsync('classdef');
const glyphClassDef = xpath.select('/ttFont/GDEF/GlyphClassDef', dom, true);
const classDefs = xpath.select('/GlyphClassDef/ClassDefs', configDom);
classDefs.forEach(node => glyphClassDef.appendChild(node));
}
async function patchHmtx(dom) {
const hmtxDom = await loadConfigAsync('hmtx');