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Website: add multiple-dimensional variation export

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This commit is contained in:
be5invis 2020-07-26 18:20:45 -07:00
parent 6b853b520b
commit 1130f0bee6
3 changed files with 69 additions and 63 deletions
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63
font-src/support/gr.js
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@ -224,6 +224,68 @@ function getGrMesh(gidList, grq, fnGidToGlyph) {
return ret;
}
function createGrDisplaySheet(font, gid) {
const glyph = font.glyf[gid];
if (!glyph) return [];
// Query selected typographic features -- mostly NWID and WWID
let typographicFeatures = [];
queryPairFeatureTags(gid, "NWID", "WWID", typographicFeatures);
queryPairFeatureTags(gid, "lnum", "onum", typographicFeatures);
let charVariantFeatures = [];
const decomposition = CvDecompose.get(glyph);
if (decomposition) {
const variantFeatureSet = new Set();
for (const componentGn of decomposition) {
const component = font.glyf[componentGn];
if (!component) continue;
const cvRow = queryCvFeatureTagsOf(componentGn, component, variantFeatureSet);
if (cvRow.length) charVariantFeatures.push(cvRow);
}
} else {
const cvRow = queryCvFeatureTagsOf(gid, glyph, null);
if (cvRow.length) charVariantFeatures.push(cvRow);
}
return [typographicFeatures, charVariantFeatures];
}
function queryPairFeatureTags(gid, f1, f2, sink) {
const glyphIsHidden = /^\./.test(gid);
if (!glyphIsHidden) {
const re1 = new RegExp(`\\.${f1}$`),
re2 = new RegExp(`\\.${f2}$`);
if (re1.test(gid) || re2.test(gid)) {
sink.push(f1, f2);
}
}
}
function byTagPreference(a, b) {
const ua = a.tag.toUpperCase(),
ub = b.tag.toUpperCase();
if (ua < ub) return -1;
if (ua > ub) return 1;
return 0;
}
function queryCvFeatureTagsOf(gid, glyph, vfs) {
const cvs = AnyCv.query(glyph).sort(byTagPreference);
let results = [];
let existingGlyphs = new Set();
for (const gr of cvs) {
const tag = gr.tag;
const target = gr.get(glyph);
if (target === gid) continue;
if (existingGlyphs.has(target)) continue;
existingGlyphs.add(target);
if (!vfs) results.push(tag);
else if (!vfs.has(tag)) {
results.push(tag);
vfs.add(tag);
}
}
return results;
}
exports.Dotless = Dotless;
exports.Cv = Cv;
exports.AnyCv = AnyCv;
@ -236,3 +298,4 @@ exports.DoNotDeriveVariants = DoNotDeriveVariants;
exports.AnyDerivingCv = AnyDerivingCv;
exports.CcmpDecompose = CcmpDecompose;
exports.CvDecompose = CvDecompose;
exports.createGrDisplaySheet = createGrDisplaySheet;