lib-font/src/opentype/tables/simple/other/meta.js

A JS based OpenType font inspector

import { SimpleTable } from "../../simple-table.js";

/**
 * The OpenType `meta` table.
 *
 * See https://docs.microsoft.com/en-us/typography/opentype/spec/meta
 */
class meta extends SimpleTable {
  constructor(dict, dataview) {
    const { p } = super(dict, dataview);

    this.version = p.uint32;
    this.flags = p.uint32;
    p.uint32;
    this.dataMapsCount = p.uint32;

    this.dataMaps = [...new Array(this.dataMapsCount)].map(
      (_) => new DataMap(this.tableStart, p)
    );
  }
}

class DataMap {
  constructor(tableStart, p) {
    this.tableStart = tableStart;
    this.parser = p;

    this.tag = p.tag;
    this.dataOffset = p.Offset32; // from the beginning of the metadata table to the data for this tag.
    this.dataLength = p.uint32;
  }

  getData() {
    // If you need this data, you're on the hook for parsing it properly.
    this.parser.currentField = this.tableStart + this.dataOffset;
    return this.parser.readBytes(this.dataLength);
  }
}

export { meta };