Function parseCFFDict

libraries/p5.js:3050–3078

(data, start, size)

// Parse a `CFF` DICT object.
// A dictionary contains key-value pairs in a compact tokenized format.
function parseCFFDict(data, start, size) {
    start = start !== undefined ? start : 0;
    var parser = new parse.Parser(data, start);
    var entries = [];
    var operands = [];
    size = size !== undefined ? size : data.length;

    while (parser.relativeOffset < size) {
        var op = parser.parseByte();

        // The first byte for each dict item distinguishes between operator (key) and operand (value).
        // Values <= 21 are operators.
        if (op <= 21) {
            // Two-byte operators have an initial escape byte of 12.
            if (op === 12) {
                op = 1200 + parser.parseByte();
            }

            entries.push([op, operands]);
            operands = [];
        } else {
            // Since the operands (values) come before the operators (keys), we store all operands in a list
            // until we encounter an operator.
            operands.push(parseOperand(parser, op));
        }
    }

    return entriesToObject(entries);
}

// Given a String Index (SID), return the value of the string.
// Strings below index 392 are standard CFF strings and are not encoded in the font.