pdfjs-dist/lib/core/fonts.js

Generic build of Mozilla's PDF.js library.

/**
 * @licstart The following is the entire license notice for the
 * Javascript code in this page
 *
 * Copyright 2021 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @licend The above is the entire license notice for the
 * Javascript code in this page
 */
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getFontType = getFontType;
exports.ToUnicodeMap = exports.SEAC_ANALYSIS_ENABLED = exports.IdentityToUnicodeMap = exports.FontFlags = exports.Font = exports.ErrorFont = void 0;

var _util = require("../shared/util.js");

var _cff_parser = require("./cff_parser.js");

var _glyphlist = require("./glyphlist.js");

var _encodings = require("./encodings.js");

var _standard_fonts = require("./standard_fonts.js");

var _unicode = require("./unicode.js");

var _core_utils = require("./core_utils.js");

var _font_renderer = require("./font_renderer.js");

var _cmap = require("./cmap.js");

var _stream = require("./stream.js");

var _type1_parser = require("./type1_parser.js");

const PRIVATE_USE_AREAS = [[0xe000, 0xf8ff], [0x100000, 0x10fffd]];
var PDF_GLYPH_SPACE_UNITS = 1000;
var SEAC_ANALYSIS_ENABLED = true;
exports.SEAC_ANALYSIS_ENABLED = SEAC_ANALYSIS_ENABLED;
const EXPORT_DATA_PROPERTIES = ["ascent", "bbox", "black", "bold", "charProcOperatorList", "composite", "data", "defaultVMetrics", "defaultWidth", "descent", "fallbackName", "fontMatrix", "fontType", "isMonospace", "isSerifFont", "isType3Font", "italic", "loadedName", "mimetype", "missingFile", "name", "remeasure", "subtype", "type", "vertical"];
const EXPORT_DATA_EXTRA_PROPERTIES = ["cMap", "defaultEncoding", "differences", "isSymbolicFont", "seacMap", "toFontChar", "toUnicode", "vmetrics", "widths"];
var FontFlags = {
  FixedPitch: 1,
  Serif: 2,
  Symbolic: 4,
  Script: 8,
  Nonsymbolic: 32,
  Italic: 64,
  AllCap: 65536,
  SmallCap: 131072,
  ForceBold: 262144
};
exports.FontFlags = FontFlags;
var MacStandardGlyphOrdering = [".notdef", ".null", "nonmarkingreturn", "space", "exclam", "quotedbl", "numbersign", "dollar", "percent", "ampersand", "quotesingle", "parenleft", "parenright", "asterisk", "plus", "comma", "hyphen", "period", "slash", "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "colon", "semicolon", "less", "equal", "greater", "question", "at", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "bracketleft", "backslash", "bracketright", "asciicircum", "underscore", "grave", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "braceleft", "bar", "braceright", "asciitilde", "Adieresis", "Aring", "Ccedilla", "Eacute", "Ntilde", "Odieresis", "Udieresis", "aacute", "agrave", "acircumflex", "adieresis", "atilde", "aring", "ccedilla", "eacute", "egrave", "ecircumflex", "edieresis", "iacute", "igrave", "icircumflex", "idieresis", "ntilde", "oacute", "ograve", "ocircumflex", "odieresis", "otilde", "uacute", "ugrave", "ucircumflex", "udieresis", "dagger", "degree", "cent", "sterling", "section", "bullet", "paragraph", "germandbls", "registered", "copyright", "trademark", "acute", "dieresis", "notequal", "AE", "Oslash", "infinity", "plusminus", "lessequal", "greaterequal", "yen", "mu", "partialdiff", "summation", "product", "pi", "integral", "ordfeminine", "ordmasculine", "Omega", "ae", "oslash", "questiondown", "exclamdown", "logicalnot", "radical", "florin", "approxequal", "Delta", "guillemotleft", "guillemotright", "ellipsis", "nonbreakingspace", "Agrave", "Atilde", "Otilde", "OE", "oe", "endash", "emdash", "quotedblleft", "quotedblright", "quoteleft", "quoteright", "divide", "lozenge", "ydieresis", "Ydieresis", "fraction", "currency", "guilsinglleft", "guilsinglright", "fi", "fl", "daggerdbl", "periodcentered", "quotesinglbase", "quotedblbase", "perthousand", "Acircumflex", "Ecircumflex", "Aacute", "Edieresis", "Egrave", "Iacute", "Icircumflex", "Idieresis", "Igrave", "Oacute", "Ocircumflex", "apple", "Ograve", "Uacute", "Ucircumflex", "Ugrave", "dotlessi", "circumflex", "tilde", "macron", "breve", "dotaccent", "ring", "cedilla", "hungarumlaut", "ogonek", "caron", "Lslash", "lslash", "Scaron", "scaron", "Zcaron", "zcaron", "brokenbar", "Eth", "eth", "Yacute", "yacute", "Thorn", "thorn", "minus", "multiply", "onesuperior", "twosuperior", "threesuperior", "onehalf", "onequarter", "threequarters", "franc", "Gbreve", "gbreve", "Idotaccent", "Scedilla", "scedilla", "Cacute", "cacute", "Ccaron", "ccaron", "dcroat"];

function adjustWidths(properties) {
  if (!properties.fontMatrix) {
    return;
  }

  if (properties.fontMatrix[0] === _util.FONT_IDENTITY_MATRIX[0]) {
    return;
  }

  var scale = 0.001 / properties.fontMatrix[0];
  var glyphsWidths = properties.widths;

  for (var glyph in glyphsWidths) {
    glyphsWidths[glyph] *= scale;
  }

  properties.defaultWidth *= scale;
}

function adjustToUnicode(properties, builtInEncoding) {
  if (properties.hasIncludedToUnicodeMap) {
    return;
  }

  if (properties.hasEncoding) {
    return;
  }

  if (builtInEncoding === properties.defaultEncoding) {
    return;
  }

  if (properties.toUnicode instanceof IdentityToUnicodeMap) {
    return;
  }

  var toUnicode = [],
      glyphsUnicodeMap = (0, _glyphlist.getGlyphsUnicode)();

  for (var charCode in builtInEncoding) {
    var glyphName = builtInEncoding[charCode];
    var unicode = (0, _unicode.getUnicodeForGlyph)(glyphName, glyphsUnicodeMap);

    if (unicode !== -1) {
      toUnicode[charCode] = String.fromCharCode(unicode);
    }
  }

  properties.toUnicode.amend(toUnicode);
}

function getFontType(type, subtype) {
  switch (type) {
    case "Type1":
      return subtype === "Type1C" ? _util.FontType.TYPE1C : _util.FontType.TYPE1;

    case "CIDFontType0":
      return subtype === "CIDFontType0C" ? _util.FontType.CIDFONTTYPE0C : _util.FontType.CIDFONTTYPE0;

    case "OpenType":
      return _util.FontType.OPENTYPE;

    case "TrueType":
      return _util.FontType.TRUETYPE;

    case "CIDFontType2":
      return _util.FontType.CIDFONTTYPE2;

    case "MMType1":
      return _util.FontType.MMTYPE1;

    case "Type0":
      return _util.FontType.TYPE0;

    default:
      return _util.FontType.UNKNOWN;
  }
}

function recoverGlyphName(name, glyphsUnicodeMap) {
  if (glyphsUnicodeMap[name] !== undefined) {
    return name;
  }

  var unicode = (0, _unicode.getUnicodeForGlyph)(name, glyphsUnicodeMap);

  if (unicode !== -1) {
    for (var key in glyphsUnicodeMap) {
      if (glyphsUnicodeMap[key] === unicode) {
        return key;
      }
    }
  }

  (0, _util.info)("Unable to recover a standard glyph name for: " + name);
  return name;
}

var Glyph = function GlyphClosure() {
  function Glyph(fontChar, unicode, accent, width, vmetric, operatorListId, isSpace, isInFont) {
    this.fontChar = fontChar;
    this.unicode = unicode;
    this.accent = accent;
    this.width = width;
    this.vmetric = vmetric;
    this.operatorListId = operatorListId;
    this.isSpace = isSpace;
    this.isInFont = isInFont;
  }

  Glyph.prototype.matchesForCache = function (fontChar, unicode, accent, width, vmetric, operatorListId, isSpace, isInFont) {
    return this.fontChar === fontChar && this.unicode === unicode && this.accent === accent && this.width === width && this.vmetric === vmetric && this.operatorListId === operatorListId && this.isSpace === isSpace && this.isInFont === isInFont;
  };

  return Glyph;
}();

var ToUnicodeMap = function ToUnicodeMapClosure() {
  function ToUnicodeMap(cmap = []) {
    this._map = cmap;
  }

  ToUnicodeMap.prototype = {
    get length() {
      return this._map.length;
    },

    forEach(callback) {
      for (var charCode in this._map) {
        callback(charCode, this._map[charCode].charCodeAt(0));
      }
    },

    has(i) {
      return this._map[i] !== undefined;
    },

    get(i) {
      return this._map[i];
    },

    charCodeOf(value) {
      const map = this._map;

      if (map.length <= 0x10000) {
        return map.indexOf(value);
      }

      for (const charCode in map) {
        if (map[charCode] === value) {
          return charCode | 0;
        }
      }

      return -1;
    },

    amend(map) {
      for (var charCode in map) {
        this._map[charCode] = map[charCode];
      }
    }

  };
  return ToUnicodeMap;
}();

exports.ToUnicodeMap = ToUnicodeMap;

var IdentityToUnicodeMap = function IdentityToUnicodeMapClosure() {
  function IdentityToUnicodeMap(firstChar, lastChar) {
    this.firstChar = firstChar;
    this.lastChar = lastChar;
  }

  IdentityToUnicodeMap.prototype = {
    get length() {
      return this.lastChar + 1 - this.firstChar;
    },

    forEach(callback) {
      for (var i = this.firstChar, ii = this.lastChar; i <= ii; i++) {
        callback(i, i);
      }
    },

    has(i) {
      return this.firstChar <= i && i <= this.lastChar;
    },

    get(i) {
      if (this.firstChar <= i && i <= this.lastChar) {
        return String.fromCharCode(i);
      }

      return undefined;
    },

    charCodeOf(v) {
      return Number.isInteger(v) && v >= this.firstChar && v <= this.lastChar ? v : -1;
    },

    amend(map) {
      (0, _util.unreachable)("Should not call amend()");
    }

  };
  return IdentityToUnicodeMap;
}();

exports.IdentityToUnicodeMap = IdentityToUnicodeMap;

var OpenTypeFileBuilder = function OpenTypeFileBuilderClosure() {
  function writeInt16(dest, offset, num) {
    dest[offset] = num >> 8 & 0xff;
    dest[offset + 1] = num & 0xff;
  }

  function writeInt32(dest, offset, num) {
    dest[offset] = num >> 24 & 0xff;
    dest[offset + 1] = num >> 16 & 0xff;
    dest[offset + 2] = num >> 8 & 0xff;
    dest[offset + 3] = num & 0xff;
  }

  function writeData(dest, offset, data) {
    var i, ii;

    if (data instanceof Uint8Array) {
      dest.set(data, offset);
    } else if (typeof data === "string") {
      for (i = 0, ii = data.length; i < ii; i++) {
        dest[offset++] = data.charCodeAt(i) & 0xff;
      }
    } else {
      for (i = 0, ii = data.length; i < ii; i++) {
        dest[offset++] = data[i] & 0xff;
      }
    }
  }

  function OpenTypeFileBuilder(sfnt) {
    this.sfnt = sfnt;
    this.tables = Object.create(null);
  }

  OpenTypeFileBuilder.getSearchParams = function OpenTypeFileBuilder_getSearchParams(entriesCount, entrySize) {
    var maxPower2 = 1,
        log2 = 0;

    while ((maxPower2 ^ entriesCount) > maxPower2) {
      maxPower2 <<= 1;
      log2++;
    }

    var searchRange = maxPower2 * entrySize;
    return {
      range: searchRange,
      entry: log2,
      rangeShift: entrySize * entriesCount - searchRange
    };
  };

  var OTF_HEADER_SIZE = 12;
  var OTF_TABLE_ENTRY_SIZE = 16;
  OpenTypeFileBuilder.prototype = {
    toArray: function OpenTypeFileBuilder_toArray() {
      var sfnt = this.sfnt;
      var tables = this.tables;
      var tablesNames = Object.keys(tables);
      tablesNames.sort();
      var numTables = tablesNames.length;
      var i, j, jj, table, tableName;
      var offset = OTF_HEADER_SIZE + numTables * OTF_TABLE_ENTRY_SIZE;
      var tableOffsets = [offset];

      for (i = 0; i < numTables; i++) {
        table = tables[tablesNames[i]];
        var paddedLength = (table.length + 3 & ~3) >>> 0;
        offset += paddedLength;
        tableOffsets.push(offset);
      }

      var file = new Uint8Array(offset);

      for (i = 0; i < numTables; i++) {
        table = tables[tablesNames[i]];
        writeData(file, tableOffsets[i], table);
      }

      if (sfnt === "true") {
        sfnt = (0, _util.string32)(0x00010000);
      }

      file[0] = sfnt.charCodeAt(0) & 0xff;
      file[1] = sfnt.charCodeAt(1) & 0xff;
      file[2] = sfnt.charCodeAt(2) & 0xff;
      file[3] = sfnt.charCodeAt(3) & 0xff;
      writeInt16(file, 4, numTables);
      var searchParams = OpenTypeFileBuilder.getSearchParams(numTables, 16);
      writeInt16(file, 6, searchParams.range);
      writeInt16(file, 8, searchParams.entry);
      writeInt16(file, 10, searchParams.rangeShift);
      offset = OTF_HEADER_SIZE;

      for (i = 0; i < numTables; i++) {
        tableName = tablesNames[i];
        file[offset] = tableName.charCodeAt(0) & 0xff;
        file[offset + 1] = tableName.charCodeAt(1) & 0xff;
        file[offset + 2] = tableName.charCodeAt(2) & 0xff;
        file[offset + 3] = tableName.charCodeAt(3) & 0xff;
        var checksum = 0;

        for (j = tableOffsets[i], jj = tableOffsets[i + 1]; j < jj; j += 4) {
          var quad = (0, _core_utils.readUint32)(file, j);
          checksum = checksum + quad >>> 0;
        }

        writeInt32(file, offset + 4, checksum);
        writeInt32(file, offset + 8, tableOffsets[i]);
        writeInt32(file, offset + 12, tables[tableName].length);
        offset += OTF_TABLE_ENTRY_SIZE;
      }

      return file;
    },
    addTable: function OpenTypeFileBuilder_addTable(tag, data) {
      if (tag in this.tables) {
        throw new Error("Table " + tag + " already exists");
      }

      this.tables[tag] = data;
    }
  };
  return OpenTypeFileBuilder;
}();

var Font = function FontClosure() {
  function Font(name, file, properties) {
    var charCode;
    this.name = name;
    this.loadedName = properties.loadedName;
    this.isType3Font = properties.isType3Font;
    this.missingFile = false;
    this.glyphCache = Object.create(null);
    this.isSerifFont = !!(properties.flags & FontFlags.Serif);
    this.isSymbolicFont = !!(properties.flags & FontFlags.Symbolic);
    this.isMonospace = !!(properties.flags & FontFlags.FixedPitch);
    var type = properties.type;
    var subtype = properties.subtype;
    this.type = type;
    this.subtype = subtype;
    let fallbackName = "sans-serif";

    if (this.isMonospace) {
      fallbackName = "monospace";
    } else if (this.isSerifFont) {
      fallbackName = "serif";
    }

    this.fallbackName = fallbackName;
    this.differences = properties.differences;
    this.widths = properties.widths;
    this.defaultWidth = properties.defaultWidth;
    this.composite = properties.composite;
    this.cMap = properties.cMap;
    this.capHeight = properties.capHeight / PDF_GLYPH_SPACE_UNITS;
    this.ascent = properties.ascent / PDF_GLYPH_SPACE_UNITS;
    this.descent = properties.descent / PDF_GLYPH_SPACE_UNITS;
    this.fontMatrix = properties.fontMatrix;
    this.bbox = properties.bbox;
    this.defaultEncoding = properties.defaultEncoding;
    this.toUnicode = properties.toUnicode;
    this.fallbackToUnicode = properties.fallbackToUnicode || new ToUnicodeMap();
    this.toFontChar = [];

    if (properties.type === "Type3") {
      for (charCode = 0; charCode < 256; charCode++) {
        this.toFontChar[charCode] = this.differences[charCode] || properties.defaultEncoding[charCode];
      }

      this.fontType = _util.FontType.TYPE3;
      return;
    }

    this.cidEncoding = properties.cidEncoding;
    this.vertical = !!properties.vertical;

    if (this.vertical) {
      this.vmetrics = properties.vmetrics;
      this.defaultVMetrics = properties.defaultVMetrics;
    }

    if (!file || file.isEmpty) {
      if (file) {
        (0, _util.warn)('Font file is empty in "' + name + '" (' + this.loadedName + ")");
      }

      this.fallbackToSystemFont(properties);
      return;
    }

    [type, subtype] = getFontFileType(file, properties);

    if (type !== this.type || subtype !== this.subtype) {
      (0, _util.info)("Inconsistent font file Type/SubType, expected: " + `${this.type}/${this.subtype} but found: ${type}/${subtype}.`);
    }

    try {
      var data;

      switch (type) {
        case "MMType1":
          (0, _util.info)("MMType1 font (" + name + "), falling back to Type1.");

        case "Type1":
        case "CIDFontType0":
          this.mimetype = "font/opentype";
          var cff = subtype === "Type1C" || subtype === "CIDFontType0C" ? new CFFFont(file, properties) : new Type1Font(name, file, properties);
          adjustWidths(properties);
          data = this.convert(name, cff, properties);
          break;

        case "OpenType":
        case "TrueType":
        case "CIDFontType2":
          this.mimetype = "font/opentype";
          data = this.checkAndRepair(name, file, properties);

          if (this.isOpenType) {
            adjustWidths(properties);
            type = "OpenType";
          }

          break;

        default:
          throw new _util.FormatError(`Font ${type} is not supported`);
      }
    } catch (e) {
      (0, _util.warn)(e);
      this.fallbackToSystemFont(properties);
      return;
    }

    this.data = data;
    this.fontType = getFontType(type, subtype);
    this.fontMatrix = properties.fontMatrix;
    this.widths = properties.widths;
    this.defaultWidth = properties.defaultWidth;
    this.toUnicode = properties.toUnicode;
    this.seacMap = properties.seacMap;
  }

  function int16(b0, b1) {
    return (b0 << 8) + b1;
  }

  function writeSignedInt16(bytes, index, value) {
    bytes[index + 1] = value;
    bytes[index] = value >>> 8;
  }

  function signedInt16(b0, b1) {
    var value = (b0 << 8) + b1;
    return value & 1 << 15 ? value - 0x10000 : value;
  }

  function int32(b0, b1, b2, b3) {
    return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3;
  }

  function string16(value) {
    return String.fromCharCode(value >> 8 & 0xff, value & 0xff);
  }

  function safeString16(value) {
    if (value > 0x7fff) {
      value = 0x7fff;
    } else if (value < -0x8000) {
      value = -0x8000;
    }

    return String.fromCharCode(value >> 8 & 0xff, value & 0xff);
  }

  function isTrueTypeFile(file) {
    var header = file.peekBytes(4);
    return (0, _core_utils.readUint32)(header, 0) === 0x00010000 || (0, _util.bytesToString)(header) === "true";
  }

  function isTrueTypeCollectionFile(file) {
    const header = file.peekBytes(4);
    return (0, _util.bytesToString)(header) === "ttcf";
  }

  function isOpenTypeFile(file) {
    var header = file.peekBytes(4);
    return (0, _util.bytesToString)(header) === "OTTO";
  }

  function isType1File(file) {
    var header = file.peekBytes(2);

    if (header[0] === 0x25 && header[1] === 0x21) {
      return true;
    }

    if (header[0] === 0x80 && header[1] === 0x01) {
      return true;
    }

    return false;
  }

  function isCFFFile(file) {
    const header = file.peekBytes(4);

    if (header[0] >= 1 && header[3] >= 1 && header[3] <= 4) {
      return true;
    }

    return false;
  }

  function getFontFileType(file, {
    type,
    subtype,
    composite
  }) {
    let fileType, fileSubtype;

    if (isTrueTypeFile(file) || isTrueTypeCollectionFile(file)) {
      if (composite) {
        fileType = "CIDFontType2";
      } else {
        fileType = "TrueType";
      }
    } else if (isOpenTypeFile(file)) {
      if (composite) {
        fileType = "CIDFontType2";
      } else {
        fileType = "OpenType";
      }
    } else if (isType1File(file)) {
      if (composite) {
        fileType = "CIDFontType0";
      } else {
        fileType = type === "MMType1" ? "MMType1" : "Type1";
      }
    } else if (isCFFFile(file)) {
      if (composite) {
        fileType = "CIDFontType0";
        fileSubtype = "CIDFontType0C";
      } else {
        fileType = type === "MMType1" ? "MMType1" : "Type1";
        fileSubtype = "Type1C";
      }
    } else {
      (0, _util.warn)("getFontFileType: Unable to detect correct font file Type/Subtype.");
      fileType = type;
      fileSubtype = subtype;
    }

    return [fileType, fileSubtype];
  }

  function buildToFontChar(encoding, glyphsUnicodeMap, differences) {
    var toFontChar = [],
        unicode;

    for (var i = 0, ii = encoding.length; i < ii; i++) {
      unicode = (0, _unicode.getUnicodeForGlyph)(encoding[i], glyphsUnicodeMap);

      if (unicode !== -1) {
        toFontChar[i] = unicode;
      }
    }

    for (var charCode in differences) {
      unicode = (0, _unicode.getUnicodeForGlyph)(differences[charCode], glyphsUnicodeMap);

      if (unicode !== -1) {
        toFontChar[+charCode] = unicode;
      }
    }

    return toFontChar;
  }

  function adjustMapping(charCodeToGlyphId, hasGlyph, newGlyphZeroId) {
    var newMap = Object.create(null);
    var toFontChar = [];
    var privateUseAreaIndex = 0;
    var nextAvailableFontCharCode = PRIVATE_USE_AREAS[privateUseAreaIndex][0];
    var privateUseOffetEnd = PRIVATE_USE_AREAS[privateUseAreaIndex][1];

    for (var originalCharCode in charCodeToGlyphId) {
      originalCharCode |= 0;
      var glyphId = charCodeToGlyphId[originalCharCode];

      if (!hasGlyph(glyphId)) {
        continue;
      }

      if (nextAvailableFontCharCode > privateUseOffetEnd) {
        privateUseAreaIndex++;

        if (privateUseAreaIndex >= PRIVATE_USE_AREAS.length) {
          (0, _util.warn)("Ran out of space in font private use area.");
          break;
        }

        nextAvailableFontCharCode = PRIVATE_USE_AREAS[privateUseAreaIndex][0];
        privateUseOffetEnd = PRIVATE_USE_AREAS[privateUseAreaIndex][1];
      }

      var fontCharCode = nextAvailableFontCharCode++;

      if (glyphId === 0) {
        glyphId = newGlyphZeroId;
      }

      newMap[fontCharCode] = glyphId;
      toFontChar[originalCharCode] = fontCharCode;
    }

    return {
      toFontChar,
      charCodeToGlyphId: newMap,
      nextAvailableFontCharCode
    };
  }

  function getRanges(glyphs, numGlyphs) {
    var codes = [];

    for (var charCode in glyphs) {
      if (glyphs[charCode] >= numGlyphs) {
        continue;
      }

      codes.push({
        fontCharCode: charCode | 0,
        glyphId: glyphs[charCode]
      });
    }

    if (codes.length === 0) {
      codes.push({
        fontCharCode: 0,
        glyphId: 0
      });
    }

    codes.sort(function fontGetRangesSort(a, b) {
      return a.fontCharCode - b.fontCharCode;
    });
    var ranges = [];
    var length = codes.length;

    for (var n = 0; n < length;) {
      var start = codes[n].fontCharCode;
      var codeIndices = [codes[n].glyphId];
      ++n;
      var end = start;

      while (n < length && end + 1 === codes[n].fontCharCode) {
        codeIndices.push(codes[n].glyphId);
        ++end;
        ++n;

        if (end === 0xffff) {
          break;
        }
      }

      ranges.push([start, end, codeIndices]);
    }

    return ranges;
  }

  function createCmapTable(glyphs, numGlyphs) {
    var ranges = getRanges(glyphs, numGlyphs);
    var numTables = ranges[ranges.length - 1][1] > 0xffff ? 2 : 1;
    var cmap = "\x00\x00" + string16(numTables) + "\x00\x03" + "\x00\x01" + (0, _util.string32)(4 + numTables * 8);
    var i, ii, j, jj;

    for (i = ranges.length - 1; i >= 0; --i) {
      if (ranges[i][0] <= 0xffff) {
        break;
      }
    }

    var bmpLength = i + 1;

    if (ranges[i][0] < 0xffff && ranges[i][1] === 0xffff) {
      ranges[i][1] = 0xfffe;
    }

    var trailingRangesCount = ranges[i][1] < 0xffff ? 1 : 0;
    var segCount = bmpLength + trailingRangesCount;
    var searchParams = OpenTypeFileBuilder.getSearchParams(segCount, 2);
    var startCount = "";
    var endCount = "";
    var idDeltas = "";
    var idRangeOffsets = "";
    var glyphsIds = "";
    var bias = 0;
    var range, start, end, codes;

    for (i = 0, ii = bmpLength; i < ii; i++) {
      range = ranges[i];
      start = range[0];
      end = range[1];
      startCount += string16(start);
      endCount += string16(end);
      codes = range[2];
      var contiguous = true;

      for (j = 1, jj = codes.length; j < jj; ++j) {
        if (codes[j] !== codes[j - 1] + 1) {
          contiguous = false;
          break;
        }
      }

      if (!contiguous) {
        var offset = (segCount - i) * 2 + bias * 2;
        bias += end - start + 1;
        idDeltas += string16(0);
        idRangeOffsets += string16(offset);

        for (j = 0, jj = codes.length; j < jj; ++j) {
          glyphsIds += string16(codes[j]);
        }
      } else {
        var startCode = codes[0];
        idDeltas += string16(startCode - start & 0xffff);
        idRangeOffsets += string16(0);
      }
    }

    if (trailingRangesCount > 0) {
      endCount += "\xFF\xFF";
      startCount += "\xFF\xFF";
      idDeltas += "\x00\x01";
      idRangeOffsets += "\x00\x00";
    }

    var format314 = "\x00\x00" + string16(2 * segCount) + string16(searchParams.range) + string16(searchParams.entry) + string16(searchParams.rangeShift) + endCount + "\x00\x00" + startCount + idDeltas + idRangeOffsets + glyphsIds;
    var format31012 = "";
    var header31012 = "";

    if (numTables > 1) {
      cmap += "\x00\x03" + "\x00\x0A" + (0, _util.string32)(4 + numTables * 8 + 4 + format314.length);
      format31012 = "";

      for (i = 0, ii = ranges.length; i < ii; i++) {
        range = ranges[i];
        start = range[0];
        codes = range[2];
        var code = codes[0];

        for (j = 1, jj = codes.length; j < jj; ++j) {
          if (codes[j] !== codes[j - 1] + 1) {
            end = range[0] + j - 1;
            format31012 += (0, _util.string32)(start) + (0, _util.string32)(end) + (0, _util.string32)(code);
            start = end + 1;
            code = codes[j];
          }
        }

        format31012 += (0, _util.string32)(start) + (0, _util.string32)(range[1]) + (0, _util.string32)(code);
      }

      header31012 = "\x00\x0C" + "\x00\x00" + (0, _util.string32)(format31012.length + 16) + "\x00\x00\x00\x00" + (0, _util.string32)(format31012.length / 12);
    }

    return cmap + "\x00\x04" + string16(format314.length + 4) + format314 + header31012 + format31012;
  }

  function validateOS2Table(os2, file) {
    file.pos = (file.start || 0) + os2.offset;
    var version = file.getUint16();
    file.skip(60);
    var selection = file.getUint16();

    if (version < 4 && selection & 0x0300) {
      return false;
    }

    var firstChar = file.getUint16();
    var lastChar = file.getUint16();

    if (firstChar > lastChar) {
      return false;
    }

    file.skip(6);
    var usWinAscent = file.getUint16();

    if (usWinAscent === 0) {
      return false;
    }

    os2.data[8] = os2.data[9] = 0;
    return true;
  }

  function createOS2Table(properties, charstrings, override) {
    override = override || {
      unitsPerEm: 0,
      yMax: 0,
      yMin: 0,
      ascent: 0,
      descent: 0
    };
    var ulUnicodeRange1 = 0;
    var ulUnicodeRange2 = 0;
    var ulUnicodeRange3 = 0;
    var ulUnicodeRange4 = 0;
    var firstCharIndex = null;
    var lastCharIndex = 0;

    if (charstrings) {
      for (var code in charstrings) {
        code |= 0;

        if (firstCharIndex > code || !firstCharIndex) {
          firstCharIndex = code;
        }

        if (lastCharIndex < code) {
          lastCharIndex = code;
        }

        var position = (0, _unicode.getUnicodeRangeFor)(code);

        if (position < 32) {
          ulUnicodeRange1 |= 1 << position;
        } else if (position < 64) {
          ulUnicodeRange2 |= 1 << position - 32;
        } else if (position < 96) {
          ulUnicodeRange3 |= 1 << position - 64;
        } else if (position < 123) {
          ulUnicodeRange4 |= 1 << position - 96;
        } else {
          throw new _util.FormatError("Unicode ranges Bits > 123 are reserved for internal usage");
        }
      }

      if (lastCharIndex > 0xffff) {
        lastCharIndex = 0xffff;
      }
    } else {
      firstCharIndex = 0;
      lastCharIndex = 255;
    }

    var bbox = properties.bbox || [0, 0, 0, 0];
    var unitsPerEm = override.unitsPerEm || 1 / (properties.fontMatrix || _util.FONT_IDENTITY_MATRIX)[0];
    var scale = properties.ascentScaled ? 1.0 : unitsPerEm / PDF_GLYPH_SPACE_UNITS;
    var typoAscent = override.ascent || Math.round(scale * (properties.ascent || bbox[3]));
    var typoDescent = override.descent || Math.round(scale * (properties.descent || bbox[1]));

    if (typoDescent > 0 && properties.descent > 0 && bbox[1] < 0) {
      typoDescent = -typoDescent;
    }

    var winAscent = override.yMax || typoAscent;
    var winDescent = -override.yMin || -typoDescent;
    return "\x00\x03" + "\x02\x24" + "\x01\xF4" + "\x00\x05" + "\x00\x00" + "\x02\x8A" + "\x02\xBB" + "\x00\x00" + "\x00\x8C" + "\x02\x8A" + "\x02\xBB" + "\x00\x00" + "\x01\xDF" + "\x00\x31" + "\x01\x02" + "\x00\x00" + "\x00\x00\x06" + String.fromCharCode(properties.fixedPitch ? 0x09 : 0x00) + "\x00\x00\x00\x00\x00\x00" + (0, _util.string32)(ulUnicodeRange1) + (0, _util.string32)(ulUnicodeRange2) + (0, _util.string32)(ulUnicodeRange3) + (0, _util.string32)(ulUnicodeRange4) + "\x2A\x32\x31\x2A" + string16(properties.italicAngle ? 1 : 0) + string16(firstCharIndex || properties.firstChar) + string16(lastCharIndex || properties.lastChar) + string16(typoAscent) + string16(typoDescent) + "\x00\x64" + string16(winAscent) + string16(winDescent) + "\x00\x00\x00\x00" + "\x00\x00\x00\x00" + string16(properties.xHeight) + string16(properties.capHeight) + string16(0) + string16(firstCharIndex || properties.firstChar) + "\x00\x03";
  }

  function createPostTable(properties) {
    var angle = Math.floor(properties.italicAngle * 2 ** 16);
    return "\x00\x03\x00\x00" + (0, _util.string32)(angle) + "\x00\x00" + "\x00\x00" + (0, _util.string32)(properties.fixedPitch) + "\x00\x00\x00\x00" + "\x00\x00\x00\x00" + "\x00\x00\x00\x00" + "\x00\x00\x00\x00";
  }

  function createNameTable(name, proto) {
    if (!proto) {
      proto = [[], []];
    }

    var strings = [proto[0][0] || "Original licence", proto[0][1] || name, proto[0][2] || "Unknown", proto[0][3] || "uniqueID", proto[0][4] || name, proto[0][5] || "Version 0.11", proto[0][6] || "", proto[0][7] || "Unknown", proto[0][8] || "Unknown", proto[0][9] || "Unknown"];
    var stringsUnicode = [];
    var i, ii, j, jj, str;

    for (i = 0, ii = strings.length; i < ii; i++) {
      str = proto[1][i] || strings[i];
      var strBufUnicode = [];

      for (j = 0, jj = str.length; j < jj; j++) {
        strBufUnicode.push(string16(str.charCodeAt(j)));
      }

      stringsUnicode.push(strBufUnicode.join(""));
    }

    var names = [strings, stringsUnicode];
    var platforms = ["\x00\x01", "\x00\x03"];
    var encodings = ["\x00\x00", "\x00\x01"];
    var languages = ["\x00\x00", "\x04\x09"];
    var namesRecordCount = strings.length * platforms.length;
    var nameTable = "\x00\x00" + string16(namesRecordCount) + string16(namesRecordCount * 12 + 6);
    var strOffset = 0;

    for (i = 0, ii = platforms.length; i < ii; i++) {
      var strs = names[i];

      for (j = 0, jj = strs.length; j < jj; j++) {
        str = strs[j];
        var nameRecord = platforms[i] + encodings[i] + languages[i] + string16(j) + string16(str.length) + string16(strOffset);
        nameTable += nameRecord;
        strOffset += str.length;
      }
    }

    nameTable += strings.join("") + stringsUnicode.join("");
    return nameTable;
  }

  Font.prototype = {
    name: null,
    font: null,
    mimetype: null,
    disableFontFace: false,

    get renderer() {
      var renderer = _font_renderer.FontRendererFactory.create(this, SEAC_ANALYSIS_ENABLED);

      return (0, _util.shadow)(this, "renderer", renderer);
    },

    exportData(extraProperties = false) {
      const exportDataProperties = extraProperties ? [...EXPORT_DATA_PROPERTIES, ...EXPORT_DATA_EXTRA_PROPERTIES] : EXPORT_DATA_PROPERTIES;
      const data = Object.create(null);
      let property, value;

      for (property of exportDataProperties) {
        value = this[property];

        if (value !== undefined) {
          data[property] = value;
        }
      }

      return data;
    },

    fallbackToSystemFont(properties) {
      this.missingFile = true;
      var name = this.name;
      var type = this.type;
      var subtype = this.subtype;
      let fontName = name.replace(/[,_]/g, "-").replace(/\s/g, "");
      var stdFontMap = (0, _standard_fonts.getStdFontMap)(),
          nonStdFontMap = (0, _standard_fonts.getNonStdFontMap)();
      const isStandardFont = !!stdFontMap[fontName];
      const isMappedToStandardFont = !!(nonStdFontMap[fontName] && stdFontMap[nonStdFontMap[fontName]]);
      fontName = stdFontMap[fontName] || nonStdFontMap[fontName] || fontName;
      this.bold = fontName.search(/bold/gi) !== -1;
      this.italic = fontName.search(/oblique/gi) !== -1 || fontName.search(/italic/gi) !== -1;
      this.black = name.search(/Black/g) !== -1;
      const isNarrow = name.search(/Narrow/g) !== -1;
      this.remeasure = (!isStandardFont || isNarrow) && Object.keys(this.widths).length > 0;

      if ((isStandardFont || isMappedToStandardFont) && type === "CIDFontType2" && this.cidEncoding.startsWith("Identity-")) {
        const GlyphMapForStandardFonts = (0, _standard_fonts.getGlyphMapForStandardFonts)(),
              cidToGidMap = properties.cidToGidMap;
        const map = [];

        for (const charCode in GlyphMapForStandardFonts) {
          map[+charCode] = GlyphMapForStandardFonts[charCode];
        }

        if (/Arial-?Black/i.test(name)) {
          var SupplementalGlyphMapForArialBlack = (0, _standard_fonts.getSupplementalGlyphMapForArialBlack)();

          for (const charCode in SupplementalGlyphMapForArialBlack) {
            map[+charCode] = SupplementalGlyphMapForArialBlack[charCode];
          }
        } else if (/Calibri/i.test(name)) {
          const SupplementalGlyphMapForCalibri = (0, _standard_fonts.getSupplementalGlyphMapForCalibri)();

          for (const charCode in SupplementalGlyphMapForCalibri) {
            map[+charCode] = SupplementalGlyphMapForCalibri[charCode];
          }
        }

        if (cidToGidMap) {
          for (const charCode in map) {
            const cid = map[charCode];

            if (cidToGidMap[cid] !== undefined) {
              map[+charCode] = cidToGidMap[cid];
            }
          }
        }

        var isIdentityUnicode = this.toUnicode instanceof IdentityToUnicodeMap;

        if (!isIdentityUnicode) {
          this.toUnicode.forEach(function (charCode, unicodeCharCode) {
            map[+charCode] = unicodeCharCode;
          });
        }

        this.toFontChar = map;
        this.toUnicode = new ToUnicodeMap(map);
      } else if (/Symbol/i.test(fontName)) {
        this.toFontChar = buildToFontChar(_encodings.SymbolSetEncoding, (0, _glyphlist.getGlyphsUnicode)(), this.differences);
      } else if (/Dingbats/i.test(fontName)) {
        if (/Wingdings/i.test(name)) {
          (0, _util.warn)("Non-embedded Wingdings font, falling back to ZapfDingbats.");
        }

        this.toFontChar = buildToFontChar(_encodings.ZapfDingbatsEncoding, (0, _glyphlist.getDingbatsGlyphsUnicode)(), this.differences);
      } else if (isStandardFont) {
        this.toFontChar = buildToFontChar(this.defaultEncoding, (0, _glyphlist.getGlyphsUnicode)(), this.differences);
      } else {
        const glyphsUnicodeMap = (0, _glyphlist.getGlyphsUnicode)();
        const map = [];
        this.toUnicode.forEach((charCode, unicodeCharCode) => {
          if (!this.composite) {
            var glyphName = this.differences[charCode] || this.defaultEncoding[charCode];
            const unicode = (0, _unicode.getUnicodeForGlyph)(glyphName, glyphsUnicodeMap);

            if (unicode !== -1) {
              unicodeCharCode = unicode;
            }
          }

          map[+charCode] = unicodeCharCode;
        });

        if (this.composite && this.toUnicode instanceof IdentityToUnicodeMap) {
          if (/Verdana/i.test(name)) {
            const GlyphMapForStandardFonts = (0, _standard_fonts.getGlyphMapForStandardFonts)();

            for (const charCode in GlyphMapForStandardFonts) {
              map[+charCode] = GlyphMapForStandardFonts[charCode];
            }
          }
        }

        this.toFontChar = map;
      }

      this.loadedName = fontName.split("-")[0];
      this.fontType = getFontType(type, subtype);
    },

    checkAndRepair: function Font_checkAndRepair(name, font, properties) {
      const VALID_TABLES = ["OS/2", "cmap", "head", "hhea", "hmtx", "maxp", "name", "post", "loca", "glyf", "fpgm", "prep", "cvt ", "CFF "];

      function readTables(file, numTables) {
        const tables = Object.create(null);
        tables["OS/2"] = null;
        tables.cmap = null;
        tables.head = null;
        tables.hhea = null;
        tables.hmtx = null;
        tables.maxp = null;
        tables.name = null;
        tables.post = null;

        for (let i = 0; i < numTables; i++) {
          const table = readTableEntry(file);

          if (!VALID_TABLES.includes(table.tag)) {
            continue;
          }

          if (table.length === 0) {
            continue;
          }

          tables[table.tag] = table;
        }

        return tables;
      }

      function readTableEntry(file) {
        var tag = (0, _util.bytesToString)(file.getBytes(4));
        var checksum = file.getInt32() >>> 0;
        var offset = file.getInt32() >>> 0;
        var length = file.getInt32() >>> 0;
        var previousPosition = file.pos;
        file.pos = file.start ? file.start : 0;
        file.skip(offset);
        var data = file.getBytes(length);
        file.pos = previousPosition;

        if (tag === "head") {
          data[8] = data[9] = data[10] = data[11] = 0;
          data[17] |= 0x20;
        }

        return {
          tag,
          checksum,
          length,
          offset,
          data
        };
      }

      function readOpenTypeHeader(ttf) {
        return {
          version: (0, _util.bytesToString)(ttf.getBytes(4)),
          numTables: ttf.getUint16(),
          searchRange: ttf.getUint16(),
          entrySelector: ttf.getUint16(),
          rangeShift: ttf.getUint16()
        };
      }

      function readTrueTypeCollectionHeader(ttc) {
        const ttcTag = (0, _util.bytesToString)(ttc.getBytes(4));
        (0, _util.assert)(ttcTag === "ttcf", "Must be a TrueType Collection font.");
        const majorVersion = ttc.getUint16();
        const minorVersion = ttc.getUint16();
        const numFonts = ttc.getInt32() >>> 0;
        const offsetTable = [];

        for (let i = 0; i < numFonts; i++) {
          offsetTable.push(ttc.getInt32() >>> 0);
        }

        const header = {
          ttcTag,
          majorVersion,
          minorVersion,
          numFonts,
          offsetTable
        };

        switch (majorVersion) {
          case 1:
            return header;

          case 2:
            header.dsigTag = ttc.getInt32() >>> 0;
            header.dsigLength = ttc.getInt32() >>> 0;
            header.dsigOffset = ttc.getInt32() >>> 0;
            return header;
        }

        throw new _util.FormatError(`Invalid TrueType Collection majorVersion: ${majorVersion}.`);
      }

      function readTrueTypeCollectionData(ttc, fontName) {
        const {
          numFonts,
          offsetTable
        } = readTrueTypeCollectionHeader(ttc);

        for (let i = 0; i < numFonts; i++) {
          ttc.pos = (ttc.start || 0) + offsetTable[i];
          const potentialHeader = readOpenTypeHeader(ttc);
          const potentialTables = readTables(ttc, potentialHeader.numTables);

          if (!potentialTables.name) {
            throw new _util.FormatError('TrueType Collection font must contain a "name" table.');
          }

          const nameTable = readNameTable(potentialTables.name);

          for (let j = 0, jj = nameTable.length; j < jj; j++) {
            for (let k = 0, kk = nameTable[j].length; k < kk; k++) {
              const nameEntry = nameTable[j][k];

              if (nameEntry && nameEntry.replace(/\s/g, "") === fontName) {
                return {
                  header: potentialHeader,
                  tables: potentialTables
                };
              }
            }
          }
        }

        throw new _util.FormatError(`TrueType Collection does not contain "${fontName}" font.`);
      }

      function readCmapTable(cmap, file, isSymbolicFont, hasEncoding) {
        if (!cmap) {
          (0, _util.warn)("No cmap table available.");
          return {
            platformId: -1,
            encodingId: -1,
            mappings: [],
            hasShortCmap: false
          };
        }

        var segment;
        var start = (file.start ? file.start : 0) + cmap.offset;
        file.pos = start;
        file.skip(2);
        var numTables = file.getUint16();
        var potentialTable;
        var canBreak = false;

        for (var i = 0; i < numTables; i++) {
          var platformId = file.getUint16();
          var encodingId = file.getUint16();
          var offset = file.getInt32() >>> 0;
          var useTable = false;

          if (potentialTable && potentialTable.platformId === platformId && potentialTable.encodingId === encodingId) {
            continue;
          }

          if (platformId === 0 && (encodingId === 0 || encodingId === 1 || encodingId === 3)) {
            useTable = true;
          } else if (platformId === 1 && encodingId === 0) {
            useTable = true;
          } else if (platformId === 3 && encodingId === 1 && (hasEncoding || !potentialTable)) {
            useTable = true;

            if (!isSymbolicFont) {
              canBreak = true;
            }
          } else if (isSymbolicFont && platformId === 3 && encodingId === 0) {
            useTable = true;
            canBreak = true;
          }

          if (useTable) {
            potentialTable = {
              platformId,
              encodingId,
              offset
            };
          }

          if (canBreak) {
            break;
          }
        }

        if (potentialTable) {
          file.pos = start + potentialTable.offset;
        }

        if (!potentialTable || file.peekByte() === -1) {
          (0, _util.warn)("Could not find a preferred cmap table.");
          return {
            platformId: -1,
            encodingId: -1,
            mappings: [],
            hasShortCmap: false
          };
        }

        var format = file.getUint16();
        file.skip(2 + 2);
        var hasShortCmap = false;
        var mappings = [];
        var j, glyphId;

        if (format === 0) {
          for (j = 0; j < 256; j++) {
            var index = file.getByte();

            if (!index) {
              continue;
            }

            mappings.push({
              charCode: j,
              glyphId: index
            });
          }

          hasShortCmap = true;
        } else if (format === 4) {
          var segCount = file.getUint16() >> 1;
          file.skip(6);
          var segIndex,
              segments = [];

          for (segIndex = 0; segIndex < segCount; segIndex++) {
            segments.push({
              end: file.getUint16()
            });
          }

          file.skip(2);

          for (segIndex = 0; segIndex < segCount; segIndex++) {
            segments[segIndex].start = file.getUint16();
          }

          for (segIndex = 0; segIndex < segCount; segIndex++) {
            segments[segIndex].delta = file.getUint16();
          }

          var offsetsCount = 0;

          for (segIndex = 0; segIndex < segCount; segIndex++) {
            segment = segments[segIndex];
            var rangeOffset = file.getUint16();

            if (!rangeOffset) {
              segment.offsetIndex = -1;
              continue;
            }

            var offsetIndex = (rangeOffset >> 1) - (segCount - segIndex);
            segment.offsetIndex = offsetIndex;
            offsetsCount = Math.max(offsetsCount, offsetIndex + segment.end - segment.start + 1);
          }

          var offsets = [];

          for (j = 0; j < offsetsCount; j++) {
            offsets.push(file.getUint16());
          }

          for (segIndex = 0; segIndex < segCount; segIndex++) {
            segment = segments[segIndex];
            start = segment.start;
            var end = segment.end;
            var delta = segment.delta;
            offsetIndex = segment.offsetIndex;

            for (j = start; j <= end; j++) {
              if (j === 0xffff) {
                continue;
              }

              glyphId = offsetIndex < 0 ? j : offsets[offsetIndex + j - start];
              glyphId = glyphId + delta & 0xffff;
              mappings.push({
                charCode: j,
                glyphId
              });
            }
          }
        } else if (format === 6) {
          var firstCode = file.getUint16();
          var entryCount = file.getUint16();

          for (j = 0; j < entryCount; j++) {
            glyphId = file.getUint16();
            var charCode = firstCode + j;
            mappings.push({
              charCode,
              glyphId
            });
          }
        } else {
          (0, _util.warn)("cmap table has unsupported format: " + format);
          return {
            platformId: -1,
            encodingId: -1,
            mappings: [],
            hasShortCmap: false
          };
        }

        mappings.sort(function (a, b) {
          return a.charCode - b.charCode;
        });

        for (i = 1; i < mappings.length; i++) {
          if (mappings[i - 1].charCode === mappings[i].charCode) {
            mappings.splice(i, 1);
            i--;
          }
        }

        return {
          platformId: potentialTable.platformId,
          encodingId: potentialTable.encodingId,
          mappings,
          hasShortCmap
        };
      }

      function sanitizeMetrics(file, header, metrics, numGlyphs, dupFirstEntry) {
        if (!header) {
          if (metrics) {
            metrics.data = null;
          }

          return;
        }

        file.pos = (file.start ? file.start : 0) + header.offset;
        file.pos += 4;
        file.pos += 2;
        file.pos += 2;
        file.pos += 2;
        file.pos += 2;
        file.pos += 2;
        file.pos += 2;
        file.pos += 2;
        file.pos += 2;
        file.pos += 2;
        file.pos += 2;
        file.pos += 8;
        file.pos += 2;
        var numOfMetrics = file.getUint16();

        if (numOfMetrics > numGlyphs) {
          (0, _util.info)("The numOfMetrics (" + numOfMetrics + ") should not be " + "greater than the numGlyphs (" + numGlyphs + ")");
          numOfMetrics = numGlyphs;
          header.data[34] = (numOfMetrics & 0xff00) >> 8;
          header.data[35] = numOfMetrics & 0x00ff;
        }

        var numOfSidebearings = numGlyphs - numOfMetrics;
        var numMissing = numOfSidebearings - (metrics.length - numOfMetrics * 4 >> 1);

        if (numMissing > 0) {
          var entries = new Uint8Array(metrics.length + numMissing * 2);
          entries.set(metrics.data);

          if (dupFirstEntry) {
            entries[metrics.length] = metrics.data[2];
            entries[metrics.length + 1] = metrics.data[3];
          }

          metrics.data = entries;
        }
      }

      function sanitizeGlyph(source, sourceStart, sourceEnd, dest, destStart, hintsValid) {
        var glyphProfile = {
          length: 0,
          sizeOfInstructions: 0
        };

        if (sourceEnd - sourceStart <= 12) {
          return glyphProfile;
        }

        var glyf = source.subarray(sourceStart, sourceEnd);
        var contoursCount = signedInt16(glyf[0], glyf[1]);

        if (contoursCount < 0) {
          contoursCount = -1;
          writeSignedInt16(glyf, 0, contoursCount);
          dest.set(glyf, destStart);
          glyphProfile.length = glyf.length;
          return glyphProfile;
        }

        var i,
            j = 10,
            flagsCount = 0;

        for (i = 0; i < contoursCount; i++) {
          var endPoint = glyf[j] << 8 | glyf[j + 1];
          flagsCount = endPoint + 1;
          j += 2;
        }

        var instructionsStart = j;
        var instructionsLength = glyf[j] << 8 | glyf[j + 1];
        glyphProfile.sizeOfInstructions = instructionsLength;
        j += 2 + instructionsLength;
        var instructionsEnd = j;
        var coordinatesLength = 0;

        for (i = 0; i < flagsCount; i++) {
          var flag = glyf[j++];

          if (flag & 0xc0) {
            glyf[j - 1] = flag & 0x3f;
          }

          let xLength = 2;

          if (flag & 2) {
            xLength = 1;
          } else if (flag & 16) {
            xLength = 0;
          }

          let yLength = 2;

          if (flag & 4) {
            yLength = 1;
          } else if (flag & 32) {
            yLength = 0;
          }

          const xyLength = xLength + yLength;
          coordinatesLength += xyLength;

          if (flag & 8) {
            var repeat = glyf[j++];
            i += repeat;
            coordinatesLength += repeat * xyLength;
          }
        }

        if (coordinatesLength === 0) {
          return glyphProfile;
        }

        var glyphDataLength = j + coordinatesLength;

        if (glyphDataLength > glyf.length) {
          return glyphProfile;
        }

        if (!hintsValid && instructionsLength > 0) {
          dest.set(glyf.subarray(0, instructionsStart), destStart);
          dest.set([0, 0], destStart + instructionsStart);
          dest.set(glyf.subarray(instructionsEnd, glyphDataLength), destStart + instructionsStart + 2);
          glyphDataLength -= instructionsLength;

          if (glyf.length - glyphDataLength > 3) {
            glyphDat