Function parseKernTable

libraries/p5.js:5057–5079

(data, start)

// Parse the `kern` table which contains kerning pairs.
function parseKernTable(data, start) {
    var pairs = {};
    var p = new parse.Parser(data, start);
    var tableVersion = p.parseUShort();
    check.argument(tableVersion === 0, 'Unsupported kern table version.');
    // Skip nTables.
    p.skip('uShort', 1);
    var subTableVersion = p.parseUShort();
    check.argument(subTableVersion === 0, 'Unsupported kern sub-table version.');
    // Skip subTableLength, subTableCoverage
    p.skip('uShort', 2);
    var nPairs = p.parseUShort();
    // Skip searchRange, entrySelector, rangeShift.
    p.skip('uShort', 3);
    for (var i = 0; i < nPairs; i += 1) {
        var leftIndex = p.parseUShort();
        var rightIndex = p.parseUShort();
        var value = p.parseShort();
        pairs[leftIndex + ',' + rightIndex] = value;
    }

    return pairs;
}

exports.parse = parseKernTable;