text: /* Copyright 2012 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.
   */
  
  import {
    assert,
    bytesToString,
    FONT_IDENTITY_MATRIX,
    FontType,
    FormatError,
    info,
    isNum,
    shadow,
    string32,
    unreachable,
    warn,
  } from "../shared/util.js";
  import {
    CFF,
    CFFCharset,
    CFFCompiler,
    CFFHeader,
    CFFIndex,
    CFFParser,
    CFFPrivateDict,
    CFFStandardStrings,
    CFFStrings,
    CFFTopDict,
  } from "./cff_parser.js";
  import { getDingbatsGlyphsUnicode, getGlyphsUnicode } from "./glyphlist.js";
  import {
    getEncoding,
    MacRomanEncoding,
    StandardEncoding,
    SymbolSetEncoding,
    ZapfDingbatsEncoding,
  } from "./encodings.js";
  import {
    getGlyphMapForStandardFonts,
    getNonStdFontMap,
    getStdFontMap,
    getSupplementalGlyphMapForArialBlack,
    getSupplementalGlyphMapForCalibri,
  } from "./standard_fonts.js";
  import {
    getUnicodeForGlyph,
    getUnicodeRangeFor,
    mapSpecialUnicodeValues,
  } from "./unicode.js";
  import {
    isWhiteSpace,
    MissingDataException,
    readUint32,
  } from "./core_utils.js";
  import { FontRendererFactory } from "./font_renderer.js";
  import { IdentityCMap } from "./cmap.js";
  import { Stream } from "./stream.js";
  import { Type1Parser } from "./type1_parser.js";
  
  // Unicode Private Use Areas:
  const PRIVATE_USE_AREAS = [
    [0xe000, 0xf8ff], // BMP (0)
    [0x100000, 0x10fffd], // PUP (16)
  ];
  
  // PDF Glyph Space Units are one Thousandth of a TextSpace Unit
  // except for Type 3 fonts
  var PDF_GLYPH_SPACE_UNITS = 1000;
  
  // Accented characters have issues on Windows and Linux. When this flag is
  // enabled glyphs that use seac and seac style endchar operators are truncated
  // and we instead just store the glyph id's of the base glyph and its accent to
  // be drawn individually.
  // Linux (freetype) requires that when a seac style endchar is used
  // that the charset must be a predefined one, however we build a
  // custom one. Windows just refuses to draw glyphs with seac operators.
  var SEAC_ANALYSIS_ENABLED = true;
  
  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,
  };
  
  // prettier-ignore
  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] === FONT_IDENTITY_MATRIX[0]) {
      return;
    }
    // adjusting width to fontMatrix scale
    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; // The font dictionary has a `ToUnicode` entry.
    }
    if (properties.hasEncoding) {
      return; // The font dictionary has an `Encoding` entry.
    }
    if (builtInEncoding === properties.defaultEncoding) {
      return; // No point in trying to adjust `toUnicode` if the encodings match.
    }
    if (properties.toUnicode instanceof IdentityToUnicodeMap) {
      return;
    }
    var toUnicode = [],
      glyphsUnicodeMap = getGlyphsUnicode();
    for (var charCode in builtInEncoding) {
      var glyphName = builtInEncoding[charCode];
      var 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" ? FontType.TYPE1C : FontType.TYPE1;
      case "CIDFontType0":
        return subtype === "CIDFontType0C"
          ? FontType.CIDFONTTYPE0C
          : FontType.CIDFONTTYPE0;
      case "OpenType":
        return FontType.OPENTYPE;
      case "TrueType":
        return FontType.TRUETYPE;
      case "CIDFontType2":
        return FontType.CIDFONTTYPE2;
      case "MMType1":
        return FontType.MMTYPE1;
      case "Type0":
        return FontType.TYPE0;
      default:
        return FontType.UNKNOWN;
    }
  }
  
  // Some bad PDF generators, e.g. Scribus PDF, include glyph names
  // in a 'uniXXXX' format -- attempting to recover proper ones.
  function recoverGlyphName(name, glyphsUnicodeMap) {
    if (glyphsUnicodeMap[name] !== undefined) {
      return name;
    }
    // The glyph name is non-standard, trying to recover.
    var unicode = getUnicodeForGlyph(name, glyphsUnicodeMap);
    if (unicode !== -1) {
      for (var key in glyphsUnicodeMap) {
        if (glyphsUnicodeMap[key] === unicode) {
          return key;
        }
      }
    }
    info("Unable to recover a standard glyph name for: " + name);
    return name;
  }
  
  var Glyph = (function GlyphClosure() {
    // eslint-disable-next-line no-shadow
    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() {
    // eslint-disable-next-line no-shadow
    function ToUnicodeMap(cmap = []) {
      // The elements of this._map can be integers or strings, depending on how
      // `cmap` was created.
      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) {
        // `Array.prototype.indexOf` is *extremely* inefficient for arrays which
        // are both very sparse and very large (see issue8372.pdf).
        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;
  })();
  
  var IdentityToUnicodeMap = (function IdentityToUnicodeMapClosure() {
    // eslint-disable-next-line no-shadow
    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) {
        unreachable("Should not call amend()");
      },
    };
  
    return 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 {
        // treating everything else as array
        for (i = 0, ii = data.length; i < ii; i++) {
          dest[offset++] = data[i] & 0xff;
        }
      }
    }
  
    // eslint-disable-next-line no-shadow
    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;
  
        // Tables needs to be written by ascendant alphabetic order
        var tables = this.tables;
        var tablesNames = Object.keys(tables);
        tablesNames.sort();
        var numTables = tablesNames.length;
  
        var i, j, jj, table, tableName;
        // layout the tables data
        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);
        // write the table data first (mostly for checksum)
        for (i = 0; i < numTables; i++) {
          table = tables[tablesNames[i]];
          writeData(file, tableOffsets[i], table);
        }
  
        // sfnt version (4 bytes)
        if (sfnt === "true") {
          // Windows hates the Mac TrueType sfnt version number
          sfnt = 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;
  
        // numTables (2 bytes)
        writeInt16(file, 4, numTables);
  
        var searchParams = OpenTypeFileBuilder.getSearchParams(numTables, 16);
  
        // searchRange (2 bytes)
        writeInt16(file, 6, searchParams.range);
        // entrySelector (2 bytes)
        writeInt16(file, 8, searchParams.entry);
        // rangeShift (2 bytes)
        writeInt16(file, 10, searchParams.rangeShift);
  
        offset = OTF_HEADER_SIZE;
        // writing table entries
        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;
  
          // checksum
          var checksum = 0;
          for (j = tableOffsets[i], jj = tableOffsets[i + 1]; j < jj; j += 4) {
            var quad = readUint32(file, j);
            checksum = (checksum + quad) >>> 0;
          }
          writeInt32(file, offset + 4, checksum);
  
          // offset
          writeInt32(file, offset + 8, tableOffsets[i]);
          // length
          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;
  })();
  
  /**
   * 'Font' is the class the outside world should use, it encapsulate all the font
   * decoding logics whatever type it is (assuming the font type is supported).
   *
   * For example to read a Type1 font and to attach it to the document:
   *   var type1Font = new Font("MyFontName", binaryFile, propertiesObject);
   *   type1Font.bind();
   */
  var Font = (function FontClosure() {
    // eslint-disable-next-line no-shadow
    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.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 = 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) {
          // Some bad PDF generators will include empty font files,
          // attempting to recover by assuming that no file exists.
          warn('Font file is empty in "' + name + '" (' + this.loadedName + ")");
        }
        this.fallbackToSystemFont();
        return;
      }
  
      // Parse the font file to determine the correct type/subtype, rather than
      // relying on the (often incorrect) data in the font dictionary; (see e.g.
      //  issue6782.pdf, issue7598.pdf, and issue9949.pdf).
      [type, subtype] = getFontFileType(file, properties);
  
      if (type !== this.type || subtype !== this.subtype) {
        info(
          "Inconsistent font file Type/SubType, expected: " +
            `${this.type}/${this.subtype} but found: ${type}/${subtype}.`
        );
      }
  
      try {
        var data;
        switch (type) {
          case "MMType1":
            info("MMType1 font (" + name + "), falling back to Type1.");
          /* falls through */
          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);
  
            // Wrap the CFF data inside an OTF font file
            data = this.convert(name, cff, properties);
            break;
  
          case "OpenType":
          case "TrueType":
          case "CIDFontType2":
            this.mimetype = "font/opentype";
  
            // Repair the TrueType file. It is can be damaged in the point of
            // view of the sanitizer
            data = this.checkAndRepair(name, file, properties);
            if (this.isOpenType) {
              adjustWidths(properties);
  
              type = "OpenType";
            }
            break;
  
          default:
            throw new FormatError(`Font ${type} is not supported`);
        }
      } catch (e) {
        warn(e);
        this.fallbackToSystemFont();
        return;
      }
  
      this.data = data;
      this.fontType = getFontType(type, subtype);
  
      // Transfer some properties again that could change during font conversion
      this.fontMatrix = properties.fontMatrix;
      this.widths = properties.widths;
      this.defaultWidth = properties.defaultWidth;
      this.toUnicode = properties.toUnicode;
      this.seacMap = properties.seacMap;
    }
  
    Font.getFontID = (function () {
      var ID = 1;
      return function Font_getFontID() {
        return String(ID++);
      };
    })();
  
    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) {
      // clamp value to the 16-bit int range
      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 (
        readUint32(header, 0) === 0x00010000 || bytesToString(header) === "true"
      );
    }
  
    function isTrueTypeCollectionFile(file) {
      const header = file.peekBytes(4);
      return bytesToString(header) === "ttcf";
    }
  
    function isOpenTypeFile(file) {
      var header = file.peekBytes(4);
      return bytesToString(header) === "OTTO";
    }
  
    function isType1File(file) {
      var header = file.peekBytes(2);
      // All Type1 font programs must begin with the comment '%!' (0x25 + 0x21).
      if (header[0] === 0x25 && header[1] === 0x21) {
        return true;
      }
      // ... obviously some fonts violate that part of the specification,
      // please refer to the comment in |Type1Font| below (pfb file header).
      if (header[0] === 0x80 && header[1] === 0x01) {
        return true;
      }
      return false;
    }
  
    /**
     * Compared to other font formats, the header in CFF files is not constant
     * but contains version numbers. To reduce the possibility of misclassifying
     * font files as CFF, it's recommended to check for other font formats first.
     */
    function isCFFFile(file) {
      const header = file.peekBytes(4);
      if (
        /* major version, [1, 255] */ header[0] >= 1 &&
        /* minor version, [0, 255]; header[1] */
        /* header size, [0, 255]; header[2] */
        /* offset(0) size, [1, 4] */ 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 {
        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 = getUnicodeForGlyph(encoding[i], glyphsUnicodeMap);
        if (unicode !== -1) {
          toFontChar[i] = unicode;
        }
      }
      for (var charCode in differences) {
        unicode = getUnicodeForGlyph(differences[charCode], glyphsUnicodeMap);
        if (unicode !== -1) {
          toFontChar[+charCode] = unicode;
        }
      }
      return toFontChar;
    }
  
    /**
     * Rebuilds the char code to glyph ID map by moving all char codes to the
     * private use area. This is done to avoid issues with various problematic
     * unicode areas where either a glyph won't be drawn or is deformed by a
     * shaper.
     * @returns {Object} Two properties:
     * 'toFontChar' - maps original char codes(the value that will be read
     * from commands such as show text) to the char codes that will be used in the
     * font that we build
     * 'charCodeToGlyphId' - maps the new font char codes to glyph ids
     */
    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];
        // For missing glyphs don't create the mappings so the glyph isn't
        // drawn.
        if (!hasGlyph(glyphId)) {
          continue;
        }
        if (nextAvailableFontCharCode > privateUseOffetEnd) {
          privateUseAreaIndex++;
          if (privateUseAreaIndex >= PRIVATE_USE_AREAS.length) {
            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) {
      // Array.sort() sorts by characters, not numerically, so convert to an
      // array of characters.
      var codes = [];
      for (var charCode in glyphs) {
        // Remove an invalid glyph ID mappings to make OTS happy.
        if (glyphs[charCode] >= numGlyphs) {
          continue;
        }
        codes.push({ fontCharCode: charCode | 0, glyphId: glyphs[charCode] });
      }
      // Some fonts have zero glyphs and are used only for text selection, but
      // there needs to be at least one to build a valid cmap table.
      if (codes.length === 0) {
        codes.push({ fontCharCode: 0, glyphId: 0 });
      }
      codes.sort(function fontGetRangesSort(a, b) {
        return a.fontCharCode - b.fontCharCode;
      });
  
      // Split the sorted codes into ranges.
      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" + // version
        string16(numTables) + // numTables
        "\x00\x03" + // platformID
        "\x00\x01" + // encodingID
        string32(4 + numTables * 8); // start of the table record
  
      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);
  
      // Fill up the 4 parallel arrays describing the segments.
      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" + // language
        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" + // platformID
          "\x00\x0A" + // encodingID
          string32(4 + numTables * 8 + 4 + format314.length); // start of the table record
        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 +=
                string32(start) + // startCharCode
                string32(end) + // endCharCode
                string32(code); // startGlyphID
              start = end + 1;
              code = codes[j];
            }
          }
          format31012 +=
            string32(start) + // startCharCode
            string32(range[1]) + // endCharCode
            string32(code); // startGlyphID
        }
        header31012 =
          "\x00\x0C" + // format
          "\x00\x00" + // reserved
          string32(format31012.length + 16) + // length
          "\x00\x00\x00\x00" + // language
          string32(format31012.length / 12); // nGroups
      }
  
      return (
        cmap +
        "\x00\x04" + // format
        string16(format314.length + 4) + // length
        format314 +
        header31012 +
        format31012
      );
    }
  
    function validateOS2Table(os2) {
      var stream = new Stream(os2.data);
      var version = stream.getUint16();
      // TODO verify all OS/2 tables fields, but currently we validate only those
      // that give us issues
      stream.getBytes(60); // skipping type, misc sizes, panose, unicode ranges
      var selection = stream.getUint16();
      if (version < 4 && selection & 0x0300) {
        return false;
      }
      var firstChar = stream.getUint16();
      var lastChar = stream.getUint16();
      if (firstChar > lastChar) {
        return false;
      }
      stream.getBytes(6); // skipping sTypoAscender/Descender/LineGap
      var usWinAscent = stream.getUint16();
      if (usWinAscent === 0) {
        // makes font unreadable by windows
        return false;
      }
  
      // OS/2 appears to be valid, resetting some fields
      os2.data[8] = os2.data[9] = 0; // IE rejects fonts if fsType != 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 = 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 FormatError(
              "Unicode ranges Bits > 123 are reserved for internal usage"
            );
          }
        }
        if (lastCharIndex > 0xffff) {
          // OS2 only supports a 16 bit int. The spec says if supplementary
          // characters are used the field should just be set to 0xFFFF.
          lastCharIndex = 0xffff;
        }
      } else {
        // TODO
        firstCharIndex = 0;
        lastCharIndex = 255;
      }
  
      var bbox = properties.bbox || [0, 0, 0, 0];
      var unitsPerEm =
        override.unitsPerEm ||
        1 / (properties.fontMatrix || FONT_IDENTITY_MATRIX)[0];
  
      // if the font units differ to the PDF glyph space units
      // then scale up the values
      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; // fixing incorrect descent
      }
      var winAscent = override.yMax || typoAscent;
      var winDescent = -override.yMin || -typoDescent;
  
      return (
        "\x00\x03" + // version
        "\x02\x24" + // xAvgCharWidth
        "\x01\xF4" + // usWeightClass
        "\x00\x05" + // usWidthClass
        "\x00\x00" + // fstype (0 to let the font loads via font-face on IE)
        "\x02\x8A" + // ySubscriptXSize
        "\x02\xBB" + // ySubscriptYSize
        "\x00\x00" + // ySubscriptXOffset
        "\x00\x8C" + // ySubscriptYOffset
        "\x02\x8A" + // ySuperScriptXSize
        "\x02\xBB" + // ySuperScriptYSize
        "\x00\x00" + // ySuperScriptXOffset
        "\x01\xDF" + // ySuperScriptYOffset
        "\x00\x31" + // yStrikeOutSize
        "\x01\x02" + // yStrikeOutPosition
        "\x00\x00" + // sFamilyClass
        "\x00\x00\x06" +
        String.fromCharCode(properties.fixedPitch ? 0x09 : 0x00) +
        "\x00\x00\x00\x00\x00\x00" + // Panose
        string32(ulUnicodeRange1) + // ulUnicodeRange1 (Bits 0-31)
        string32(ulUnicodeRange2) + // ulUnicodeRange2 (Bits 32-63)
        string32(ulUnicodeRange3) + // ulUnicodeRange3 (Bits 64-95)
        string32(ulUnicodeRange4) + // ulUnicodeRange4 (Bits 96-127)
        "\x2A\x32\x31\x2A" + // achVendID
        string16(properties.italicAngle ? 1 : 0) + // fsSelection
        string16(firstCharIndex || properties.firstChar) + // usFirstCharIndex
        string16(lastCharIndex || properties.lastChar) + // usLastCharIndex
        string16(typoAscent) + // sTypoAscender
        string16(typoDescent) + // sTypoDescender
        "\x00\x64" + // sTypoLineGap (7%-10% of the unitsPerEM value)
        string16(winAscent) + // usWinAscent
        string16(winDescent) + // usWinDescent
        "\x00\x00\x00\x00" + // ulCodePageRange1 (Bits 0-31)
        "\x00\x00\x00\x00" + // ulCodePageRange2 (Bits 32-63)
        string16(properties.xHeight) + // sxHeight
        string16(properties.capHeight) + // sCapHeight
        string16(0) + // usDefaultChar
        string16(firstCharIndex || properties.firstChar) + // usBreakChar
        "\x00\x03"
      ); // usMaxContext
    }
  
    function createPostTable(properties) {
      var angle = Math.floor(properties.italicAngle * 2 ** 16);
      return (
        "\x00\x03\x00\x00" + // Version number
        string32(angle) + // italicAngle
        "\x00\x00" + // underlinePosition
        "\x00\x00" + // underlineThickness
        string32(properties.fixedPitch) + // isFixedPitch
        "\x00\x00\x00\x00" + // minMemType42
        "\x00\x00\x00\x00" + // maxMemType42
        "\x00\x00\x00\x00" + // minMemType1
        "\x00\x00\x00\x00"
      ); // maxMemType1
    }
  
    function createNameTable(name, proto) {
      if (!proto) {
        proto = [[], []]; // no strings and unicode strings
      }
  
      var strings = [
        proto[0][0] || "Original licence", // 0.Copyright
        proto[0][1] || name, // 1.Font family
        proto[0][2] || "Unknown", // 2.Font subfamily (font weight)
        proto[0][3] || "uniqueID", // 3.Unique ID
        proto[0][4] || name, // 4.Full font name
        proto[0][5] || "Version 0.11", // 5.Version
        proto[0][6] || "", // 6.Postscript name
        proto[0][7] || "Unknown", // 7.Trademark
        proto[0][8] || "Unknown", // 8.Manufacturer
        proto[0][9] || "Unknown", // 9.Designer
      ];
  
      // Mac want 1-byte per character strings while Windows want
      // 2-bytes per character, so duplicate the names table
      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" + // format
        string16(namesRecordCount) + // Number of names Record
        string16(namesRecordCount * 12 + 6); // Storage
  
      // Build the name records field
      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] + // platform ID
            encodings[i] + // encoding ID
            languages[i] + // language ID
            string16(j) + // name ID
            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 = FontRendererFactory.create(this, SEAC_ANALYSIS_ENABLED);
        return 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];
          // Ignore properties that haven't been explicitly set.
          if (value !== undefined) {
            data[property] = value;
          }
        }
        return data;
      },
  
      fallbackToSystemFont: function Font_fallbackToSystemFont() {
        this.missingFile = true;
        // The file data is not specified. Trying to fix the font name
        // to be used with the canvas.font.
        var name = this.name;
        var type = this.type;
        var subtype = this.subtype;
        let fontName = name.replace(/[,_]/g, "-").replace(/\s/g, "");
        var stdFontMap = getStdFontMap(),
          nonStdFontMap = getNonStdFontMap();
        var isStandardFont =
          !!stdFontMap[fontName] ||
          !!(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;
  
        // Use 'name' instead of 'fontName' here because the original
        // name ArialBlack for example will be replaced by Helvetica.
        this.black = name.search(/Black/g) !== -1;
  
        // if at least one width is present, remeasure all chars when exists
        this.remeasure = Object.keys(this.widths).length > 0;
        if (
          isStandardFont &&
          type === "CIDFontType2" &&
          this.cidEncoding.startsWith("Identity-")
        ) {
          const GlyphMapForStandardFonts = getGlyphMapForStandardFonts();
          // Standard fonts might be embedded as CID font without glyph mapping.
          // Building one based on GlyphMapForStandardFonts.
          const map = [];
          for (const charCode in GlyphMapForStandardFonts) {
            map[+charCode] = GlyphMapForStandardFonts[charCode];
          }
          if (/Arial-?Black/i.test(name)) {
            var SupplementalGlyphMapForArialBlack = getSupplementalGlyphMapForArialBlack();
            for (const charCode in SupplementalGlyphMapForArialBlack) {
              map[+charCode] = SupplementalGlyphMapForArialBlack[charCode];
            }
          } else if (/Calibri/i.test(name)) {
            const SupplementalGlyphMapForCalibri = getSupplementalGlyphMapForCalibri();
            for (const charCode in SupplementalGlyphMapForCalibri) {
              map[+charCode] = SupplementalGlyphMapForCalibri[charCode];
            }
          }
  
          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(
            SymbolSetEncoding,
            getGlyphsUnicode(),
            this.differences
          );
        } else if (/Dingbats/i.test(fontName)) {
          if (/Wingdings/i.test(name)) {
            warn("Non-embedded Wingdings font, falling back to ZapfDingbats.");
          }
          this.toFontChar = buildToFontChar(
            ZapfDingbatsEncoding,
            getDingbatsGlyphsUnicode(),
            this.differences
          );
        } else if (isStandardFont) {
          this.toFontChar = buildToFontChar(
            this.defaultEncoding,
            getGlyphsUnicode(),
            this.differences
          );
        } else {
          const glyphsUnicodeMap = getGlyphsUnicode();
          const map = [];
          this.toUnicode.forEach((charCode, unicodeCharCode) => {
            if (!this.composite) {
              var glyphName =
                this.differences[charCode] || this.defaultEncoding[charCode];
              const unicode = getUnicodeForGlyph(glyphName, glyphsUnicodeMap);
              if (unicode !== -1) {
                unicodeCharCode = unicode;
              }
            }
            map[+charCode] = unicodeCharCode;
          });
  
          // Attempt to improve the glyph mapping for (some) composite fonts that
          // appear to lack meaningful ToUnicode data.
          if (this.composite && this.toUnicode instanceof IdentityToUnicodeMap) {
            if (/Verdana/i.test(name)) {
              // Fixes issue11242_reduced.pdf
              const GlyphMapForStandardFonts = 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; // skipping table if it's not a required or optional table
            }
            if (table.length === 0) {
              continue; // skipping empty tables
            }
            tables[table.tag] = table;
          }
          return tables;
        }
  
        function readTableEntry(file) {
          var tag = bytesToString(file.getBytes(4));
  
          var checksum = file.getInt32() >>> 0;
          var offset = file.getInt32() >>> 0;
          var length = file.getInt32() >>> 0;
  
          // Read the table associated data
          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") {
            // clearing checksum adjustment
            data[8] = data[9] = data[10] = data[11] = 0;
            data[17] |= 0x20; // Set font optimized for cleartype flag.
          }
  
          return {
            tag,
            checksum,
            length,
            offset,
            data,
          };
        }
  
        function readOpenTypeHeader(ttf) {
          return {
            version: bytesToString(ttf.getBytes(4)),
            numTables: ttf.getUint16(),
            searchRange: ttf.getUint16(),
            entrySelector: ttf.getUint16(),
            rangeShift: ttf.getUint16(),
          };
        }
  
        function readTrueTypeCollectionHeader(ttc) {
          const ttcTag = bytesToString(ttc.getBytes(4));
          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 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 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 FormatError(
            `TrueType Collection does not contain "${fontName}" font.`
          );
        }
  
        /**
         * Read the appropriate subtable from the cmap according to 9.6.6.4 from
         * PDF spec
         */
        function readCmapTable(cmap, file, isSymbolicFont, hasEncoding) {
          if (!cmap) {
            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.getUint16(); // version
          var numTables = file.getUint16();
  
          var potentialTable;
          var canBreak = false;
          // There's an order of preference in terms of which cmap subtable to
          // use:
          // - non-symbolic fonts the preference is a 3,1 table then a 1,0 table
          // - symbolic fonts the preference is a 3,0 table then a 1,0 table
          // The following takes advantage of the fact that the tables are sorted
          // to work.
          for (var i = 0; i < numTables; i++) {
            var platformId = file.getUint16();
            var encodingId = file.getUint16();
            var offset = file.getInt32() >>> 0;
            var useTable = false;
  
            // Sometimes there are multiple of the same type of table. Default
            // to choosing the first table and skip the rest.
            if (
              potentialTable &&
              potentialTable.platformId === platformId &&
              potentialTable.encodingId === encodingId
            ) {
              continue;
            }
  
            if (platformId === 0 && encodingId === 0) {
              useTable = true;
              // Continue the loop since there still may be a higher priority
              // table.
            } else if (platformId === 1 && encodingId === 0) {
              useTable = true;
              // Continue the loop since there still may be a higher priority
              // table.
            } 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) {
            warn("Could not find a preferred cmap table.");
            return {
              platformId: -1,
              encodingId: -1,
              mappings: [],
              hasShortCmap: false,
            };
          }
  
          var format = file.getUint16();
          file.getUint16(); // length
          file.getUint16(); // language
  
          var hasShortCmap = false;
          var mappings = [];
          var j, glyphId;
  
          // TODO(mack): refactor this cmap subtable reading logic out
          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) {
            // re-creating the table in format 4 since the encoding
            // might be changed
            var segCount = file.getUint16() >> 1;
            file.getBytes(6); // skipping range fields
            var segIndex,
              segments = [];
            for (segIndex = 0; segIndex < segCount; segIndex++) {
              segments.push({ end: file.getUint16() });
            }
            file.getUint16();
            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) {
            // Format 6 is a 2-bytes dense mapping, which means the font data
            // lives glue together even if they are pretty far in the unicode
            // table. (This looks weird, so I can have missed something), this
            // works on Linux but seems to fails on Mac so let's rewrite the
            // cmap table to a 3-1-4 style
            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 {
            warn("cmap table has unsupported format: " + format);
            return {
              platformId: -1,
              encodingId: -1,
              mappings: [],
              hasShortCmap: false,
            };
          }
  
          // removing duplicate entries
          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; // version
          file.pos += 2; // ascent
          file.pos += 2; // descent
          file.pos += 2; // linegap
          file.pos += 2; // adv_width_max
          file.pos += 2; // min_sb1
          file.pos += 2; // min_sb2
          file.pos += 2; // max_extent
          file.pos += 2; // caret_slope_rise
          file.pos += 2; // caret_slope_run
          file.pos += 2; // caret_offset
          file.pos += 8; // reserved
          file.pos += 2; // format
          var numOfMetrics = file.getUint16();
  
          if (numOfMetrics > numGlyphs) {
            info(
              "The numOfMetrics (" +
                numOfMetrics +
                ") should not be " +
                "greater than the numGlyphs (" +
                numGlyphs +
                ")"
            );
            // Reduce numOfMetrics if it is greater than 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) {
            // For each missing glyph, we set both the width and lsb to 0 (zero).
            // Since we need to add two properties for each glyph, this explains
            // the use of |numMissing * 2| when initializing the typed array.
            var entries = new Uint8Array(metrics.length + numMissing * 2);
            entries.set(metrics.data);
            if (dupFirstEntry) {
              // Set the sidebearing value of the duplicated glyph.
              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) {
            // glyph with data less than 12 is invalid one
            return glyphProfile;
          }
          var glyf = source.subarray(sourceStart, sourceEnd);
          var contoursCount = signedInt16(glyf[0], glyf[1]);
          if (contoursCount < 0) {
            // OTS doesn't like contour count to be less than -1.
            contoursCount = -1;
            writeSignedInt16(glyf, 0, contoursCount);
            // complex glyph, writing as is
            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;
          }
          // skipping instructions
          var instructionsStart = j;
          var instructionsLength = (glyf[j] << 8) | glyf[j + 1];
          glyphProfile.sizeOfInstructions = instructionsLength;
          j += 2 + instructionsLength;
          var instructionsEnd = j;
          // validating flags
          var coordinatesLength = 0;
          for (i = 0; i < flagsCount; i++) {
            var flag = glyf[j++];
            if (flag & 0xc0) {
              // reserved flags must be zero, cleaning up
              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;
            }
          }
          // glyph without coordinates will be rejected
          if (coordinatesLength === 0) {
            return glyphProfile;
          }
          var glyphDataLength = j + coordinatesLength;
          if (glyphDataLength > glyf.length) {
            // not enough data for coordinates
            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) {
              glyphDataLength = (glyphDataLength + 3) & ~3;
            }
            glyphProfile.length = glyphDataLength;
            return glyphProfile;
          }
          if (glyf.length - glyphDataLength > 3) {
            // truncating and aligning to 4 bytes the long glyph data
            glyphDataLength = (glyphDataLength + 3) & ~3;
            dest.set(glyf.subarray(0, glyphDataLength), destStart);
            glyphProfile.length = glyphDataLength;
            return glyphProfile;
          }
          // glyph data is fine
          dest.set(glyf, destStart);
          glyphProfile.length = glyf.length;
          return glyphProfile;
        }
  
        function sanitizeHead(head, numGlyphs, locaLength) {
          var data = head.data;
  
          // Validate version:
          // Should always be 0x00010000
          var version = int32(data[0], data[1], data[2], data[3]);
          if (version >> 16 !== 1) {
            info("Attempting to fix invalid version in head table: " + version);
            data[0] = 0;
            data[1] = 1;
            data[2] = 0;
            data[3] = 0;
          }
  
          var indexToLocFormat = int16(data[50], data[51]);
          if (indexToLocFormat < 0 || indexToLocFormat > 1) {
            info(
              "Attempting to fix invalid indexToLocFormat in head table: " +
                indexToLocFormat
            );
  
            // The value of indexToLocFormat should be 0 if the loca table
            // consists of short offsets, and should be 1 if the loca table
            // consists of long offsets.
            //
            // The number of entries in the loca table should be numGlyphs + 1.
            //
            // Using this information, we can work backwards to deduce if the
            // size of each offset in the loca table, and thus figure out the
            // appropriate value for indexToLocFormat.
  
            var numGlyphsPlusOne = numGlyphs + 1;
            if (locaLength === numGlyphsPlusOne << 1) {
              // 0x0000 indicates the loca table consists of short offsets
              data[50] = 0;
              data[51] = 0;
            } else if (locaLength === numGlyphsPlusOne << 2) {
              // 0x0001 indicates the loca table consists of long offsets
              data[50] = 0;
              data[51] = 1;
            } else {
              throw new FormatError(
                "Could not fix indexToLocFormat: " + indexToLocFormat
              );
            }
          }
        }
  
        function sanitizeGlyphLocations(
          loca,
          glyf,
          numGlyphs,
          isGlyphLocationsLong,
          hintsValid,
          dupFirstEntry,
          maxSizeOfInstructions
        ) {
          var itemSize, itemDecode, itemEncode;
          if (isGlyphLocationsLong) {
            itemSize = 4;
            itemDecode = function fontItemDecodeLong(data, offset) {
              return (
                (data[offset] << 24) |
                (data[offset + 1] << 16) |
                (data[offset + 2] << 8) |
                data[offset + 3]
              );
            };
            itemEncode = function fontItemEncodeLong(data, offset, value) {
              data[offset] = (value >>> 24) & 0xff;
              data[offset + 1] = (value >> 16) & 0xff;
              data[offset + 2] = (value >> 8) & 0xff;
              data[offset + 3] = value & 0xff;
            };
          } else {
            itemSize = 2;
            itemDecode = function fontItemDecode(data, offset) {
              return (data[offset] << 9) | (data[offset + 1] << 1);
            };
            itemEncode = function fontItemEncode(data, offset, value) {
              data[offset] = (value >> 9) & 0xff;
              data[offset + 1] = (value >> 1) & 0xff;
            };
          }
          // The first glyph is duplicated.
          var numGlyphsOut = dupFirstEntry ? numGlyphs + 1 : numGlyphs;
          var locaDataSize = itemSize * (1 + numGlyphsOut);
          // Resize loca table to account for duplicated glyph.
          var locaData = new Uint8Array(locaDataSize);
          locaData.set(loca.data.subarray(0, locaDataSize));
          loca.data = locaData;
          // removing the invalid glyphs
          var oldGlyfData = glyf.data;
          var oldGlyfDataLength = oldGlyfData.length;
          var newGlyfData = new Uint8Array(oldGlyfDataLength);
          var startOffset = itemDecode(locaData, 0);
          var writeOffset = 0;
          var missingGlyphs = Object.create(null);
          itemEncode(locaData, 0, writeOffset);
          var i, j;
          for (i = 0, j = itemSize; i < numGlyphs; i++, j += itemSize) {
            var endOffset = itemDecode(locaData, j);
            // The spec says the offsets should be in ascending order, however
            // some fonts use the offset of 0 to mark a glyph as missing.
            if (endOffset === 0) {
              endOffset = startOffset;
            }
            if (
              endOffset > oldGlyfDataLength &&
              ((oldGlyfDataLength + 3) & ~3) === endOffset
            ) {
              // Aspose breaks fonts by aligning the glyphs to the qword, but not
              // the glyf table size, which makes last glyph out of range.
              endOffset = oldGlyfDataLength;
            }
            if (endOffset > oldGlyfDataLength) {
              // glyph end offset points outside glyf data, rejecting the glyph
              startOffset = endOffset;
            }
  
            var glyphProfile = sanitizeGlyph(
              oldGlyfData,
              startOffset,
              endOffset,
              newGlyfData,
              writeOffset,
              hintsValid
            );
            var newLength = glyphProfile.length;
            if (newLength === 0) {
              missingGlyphs[i] = true;
            }
            if (glyphProfile.sizeOfInstructions > maxSizeOfInstructions) {
              maxSizeOfInstructions = glyphProfile.sizeOfInstructions;
            }
            writeOffset += newLength;
            itemEncode(locaData, j, writeOffset);
            startOffset = endOffset;
          }
  
          if (writeOffset === 0) {
            // glyf table cannot be empty -- redoing the glyf and loca tables
            // to have single glyph with one point
            var simpleGlyph = new Uint8Array([
              0,
              1,
              0,
              0,
              0,
              0,
              0,
              0,
              0,
              0,
              0,
              0,
              0,
              0,
              49,
              0,
            ]);
            for (i = 0, j = itemSize; i < numGlyphsOut; i++, j += itemSize) {
              itemEncode(locaData, j, simpleGlyph.length);
            }
            glyf.data = simpleGlyph;
          } else if (dupFirstEntry) {
            // Browsers will not display a glyph at position 0. Typically glyph 0
            // is notdef, but a number of fonts put a valid glyph there so it must
            // be duplicated and appended.
            var firstEntryLength = itemDecode(locaData, itemSize);
            if (newGlyfData.length > firstEntryLength + writeOffset) {
              glyf.data = newGlyfData.subarray(0, firstEntryLength + writeOffset);
            } else {
              glyf.data = new Uint8Array(firstEntryLength + writeOffset);
              glyf.data.set(newGlyfData.subarray(0, writeOffset));
            }
            glyf.data.set(newGlyfData.subarray(0, firstEntryLength), writeOffset);
            itemEncode(
              loca.data,
              locaData.length - itemSize,
              writeOffset + firstEntryLength
            );
          } else {
            glyf.data = newGlyfData.subarray(0, writeOffset);
          }
          return {
            missingGlyphs,
            maxSizeOfInstructions,
          };
        }
  
        function readPostScriptTable(post, propertiesObj, maxpNumGlyphs) {
          var start = (font.start ? font.start : 0) + post.offset;
          font.pos = start;
  
          var length = post.length,
            end = start + length;
          var version = font.getInt32();
          // skip rest to the tables
          font.getBytes(28);
  
          var glyphNames;
          var valid = true;
          var i;
  
          switch (version) {
            case 0x00010000:
              glyphNames = MacStandardGlyphOrdering;
              break;
            case 0x00020000:
              var numGlyphs = font.getUint16();
              if (numGlyphs !== maxpNumGlyphs) {
                valid = false;
                break;
              }
              var glyphNameIndexes = [];
              for (i = 0; i < numGlyphs; ++i) {
                var index = font.getUint16();
                if (index >= 32768) {
                  valid = false;
                  break;
                }
                glyphNameIndexes.push(index);
              }
              if (!valid) {
                break;
              }
              var customNames = [];
              var strBuf = [];
              while (font.pos < end) {
                var stringLength = font.getByte();
                strBuf.length = stringLength;
                for (i = 0; i < stringLength; ++i) {
                  strBuf[i] = String.fromCharCode(font.getByte());
                }
                customNames.push(strBuf.join(""));
              }
              glyphNames = [];
              for (i = 0; i < numGlyphs; ++i) {
                var j = glyphNameIndexes[i];
                if (j < 258) {
                  glyphNames.push(MacStandardGlyphOrdering[j]);
                  continue;
                }
                glyphNames.push(customNames[j - 258]);
              }
              break;
            case 0x00030000:
              break;
            default:
              warn("Unknown/unsupported post table version " + version);
              valid = false;
              if (propertiesObj.defaultEncoding) {
                glyphNames = propertiesObj.defaultEncoding;
              }
              break;
          }
          propertiesObj.glyphNames = glyphNames;
          return valid;
        }
  
        function readNameTable(nameTable) {
          var start = (font.start ? font.start : 0) + nameTable.offset;
          font.pos = start;
  
          var names = [[], []];
          var length = nameTable.length,
            end = start + length;
          var format = font.getUint16();
          var FORMAT_0_HEADER_LENGTH = 6;
          if (format !== 0 || length < FORMAT_0_HEADER_LENGTH) {
            // unsupported name table format or table "too" small
            return names;
          }
          var numRecords = font.getUint16();
          var stringsStart = font.getUint16();
          var records = [];
          var NAME_RECORD_LENGTH = 12;
          var i, ii;
  
          for (
            i = 0;
            i < numRecords && font.pos + NAME_RECORD_LENGTH <= end;
            i++
          ) {
            var r = {
              platform: font.getUint16(),
              encoding: font.getUint16(),
              language: font.getUint16(),
              name: font.getUint16(),
              length: font.getUint16(),
              offset: font.getUint16(),
            };
            // using only Macintosh and Windows platform/encoding names
            if (
              (r.platform === 1 && r.encoding === 0 && r.language === 0) ||
              (r.platform === 3 && r.encoding === 1 && r.language === 0x409)
            ) {
              records.push(r);
            }
          }
          for (i = 0, ii = records.length; i < ii; i++) {
            var record = records[i];
            if (record.length <= 0) {
              continue; // Nothing to process, ignoring.
            }
            var pos = start + stringsStart + record.offset;
            if (pos + record.length > end) {
              continue; // outside of name table, ignoring
            }
            font.pos = pos;
            var nameIndex = record.name;
            if (record.encoding) {
              // unicode
              var str = "";
              for (var j = 0, jj = record.length; j < jj; j += 2) {
                str += String.fromCharCode(font.getUint16());
              }
              names[1][nameIndex] = str;
            } else {
              names[0][nameIndex] = bytesToString(font.getBytes(record.length));
            }
          }
          return names;
        }
  
        // prettier-ignore
        var TTOpsStackDeltas = [
          0, 0, 0, 0, 0, 0, 0, 0, -2, -2, -2, -2, 0, 0, -2, -5,
          -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, -1, 0, -1, -1, -1, -1,
          1, -1, -999, 0, 1, 0, -1, -2, 0, -1, -2, -1, -1, 0, -1, -1,
          0, 0, -999, -999, -1, -1, -1, -1, -2, -999, -2, -2, -999, 0, -2, -2,
          0, 0, -2, 0, -2, 0, 0, 0, -2, -1, -1, 1, 1, 0, 0, -1,
          -1, -1, -1, -1, -1, -1, 0, 0, -1, 0, -1, -1, 0, -999, -1, -1,
          -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
          -2, -999, -999, -999, -999, -999, -1, -1, -2, -2, 0, 0, 0, 0, -1, -1,
          -999, -2, -2, 0, 0, -1, -2, -2, 0, 0, 0, -1, -1, -1, -2];
        // 0xC0-DF == -1 and 0xE0-FF == -2
  
        function sanitizeTTProgram(table, ttContext) {
          var data = table.data;
          var i = 0,
            j,
            n,
            b,
            funcId,
            pc,
            lastEndf = 0,
            lastDeff = 0;
          var stack = [];
          var callstack = [];
          var functionsCalled = [];
          var tooComplexToFollowFunctions = ttContext.tooComplexToFollowFunctions;
          var inFDEF = false,
            ifLevel = 0,
            inELSE = 0;
          for (var ii = data.length; i < ii; ) {
            var op = data[i++];
            // The TrueType instruction set docs can be found at
            // https://developer.apple.com/fonts/TTRefMan/RM05/Chap5.html
            if (op === 0x40) {
              // NPUSHB - pushes n bytes
              n = data[i++];
              if (inFDEF || inELSE) {
                i += n;
              } else {
                for (j = 0; j < n; j++) {
                  stack.push(data[i++]);
                }
              }
            } else if (op === 0x41) {
              // NPUSHW - pushes n words
              n = data[i++];
              if (inFDEF || inELSE) {
                i += n * 2;
              } else {
                for (j = 0; j < n; j++) {
                  b = data[i++];
                  stack.push((b << 8) | data[i++]);
                }
              }
            } else if ((op & 0xf8) === 0xb0) {
              // PUSHB - pushes bytes
              n = op - 0xb0 + 1;
              if (inFDEF || inELSE) {
                i += n;
              } else {
                for (j = 0; j < n; j++) {
                  stack.push(data[i++]);
                }
              }
            } else if ((op & 0xf8) === 0xb8) {
              // PUSHW - pushes words
              n = op - 0xb8 + 1;
              if (inFDEF || inELSE) {
                i += n * 2;
              } else {
                for (j = 0; j < n; j++) {
                  b = data[i++];
                  stack.push((b << 8) | data[i++]);
                }
              }
            } else if (op === 0x2b && !tooComplexToFollowFunctions) {
              // CALL
              if (!inFDEF && !inELSE) {
                // collecting information about which functions are used
                funcId = stack[stack.length - 1];
                if (isNaN(funcId)) {
                  info("TT: CALL empty stack (or invalid entry).");
                } else {
                  ttContext.functionsUsed[funcId] = true;
                  if (funcId in ttContext.functionsStackDeltas) {
                    const newStackLength =
                      stack.length + ttContext.functionsStackDeltas[funcId];
                    if (newStackLength < 0) {
                      warn("TT: CALL invalid functions stack delta.");
                      ttContext.hintsValid = false;
                      return;
                    }
                    stack.length = newStackLength;
                  } else if (
                    funcId in ttContext.functionsDefined &&
                    !functionsCalled.includes(funcId)
                  ) {
                    callstack.push({ data, i, stackTop: stack.length - 1 });
                    functionsCalled.push(funcId);
                    pc = ttContext.functionsDefined[funcId];
                    if (!pc) {
                      warn("TT: CALL non-existent function");
                      ttContext.hintsValid = false;
                      return;
                    }
                    data = pc.data;
                    i = pc.i;
                  }
                }
              }
            } else if (op === 0x2c && !tooComplexToFollowFunctions) {
              // FDEF
              if (inFDEF || inELSE) {
                warn("TT: nested FDEFs not allowed");
                tooComplexToFollowFunctions = true;
              }
              inFDEF = true;
              // collecting information about which functions are defined
              lastDeff = i;
              funcId = stack.pop();
              ttContext.functionsDefined[funcId] = { data, i };
            } else if (op === 0x2d) {
              // ENDF - end of function
              if (inFDEF) {
                inFDEF = false;
                lastEndf = i;
              } else {
                pc = callstack.pop();
                if (!pc) {
                  warn("TT: ENDF bad stack");
                  ttContext.hintsValid = false;
                  return;
                }
                funcId = functionsCalled.pop();
                data = pc.data;
                i = pc.i;
                ttContext.functionsStackDeltas[funcId] =
                  stack.length - pc.stackTop;
              }
            } else if (op === 0x89) {
              // IDEF - instruction definition
              if (inFDEF || inELSE) {
                warn("TT: nested IDEFs not allowed");
                tooComplexToFollowFunctions = true;
              }
              inFDEF = true;
              // recording it as a function to track ENDF
              lastDeff = i;
            } else if (op === 0x58) {
              // IF
              ++ifLevel;
            } else if (op === 0x1b) {
              // ELSE
              inELSE = ifLevel;
            } else if (op === 0x59) {
              // EIF
              if (inELSE === ifLevel) {
                inELSE = 0;
              }
              --ifLevel;
            } else if (op === 0x1c) {
              // JMPR
              if (!inFDEF && !inELSE) {
                var offset = stack[stack.length - 1];
                // only jumping forward to prevent infinite loop
                if (offset > 0) {
                  i += offset - 1;
                }
              }
            }
            // Adjusting stack not extactly, but just enough to get function id
            if (!inFDEF && !inELSE) {
              let stackDelta = 0;
              if (op <= 0x8e) {
                stackDelta = TTOpsStackDeltas[op];
              } else if (op >= 0xc0 && op <= 0xdf) {
                stackDelta = -1;
              } else if (op >= 0xe0) {
                stackDelta = -2;
              }
              if (op >= 0x71 && op <= 0x75) {
                n = stack.pop();
                if (!isNaN(n)) {
                  stackDelta = -n * 2;
                }
              }
              while (stackDelta < 0 && stack.length > 0) {
                stack.pop();
                stackDelta++;
              }
              while (stackDelta > 0) {
                stack.push(NaN); // pushing any number into stack
                stackDelta--;
              }
            }
          }
          ttContext.tooComplexToFollowFunctions = tooComplexToFollowFunctions;
          var content = [data];
          if (i > data.length) {
            content.push(new Uint8Array(i - data.length));
          }
          if (lastDeff > lastEndf) {
            warn("TT: complementing a missing function tail");
            // new function definition started, but not finished
            // complete function by [CLEAR, ENDF]
            content.push(new Uint8Array([0x22, 0x2d]));
          }
          foldTTTable(table, content);
        }
  
        function checkInvalidFunctions(ttContext, maxFunctionDefs) {
          if (ttContext.tooComplexToFollowFunctions) {
            return;
          }
          if (ttContext.functionsDefined.length > maxFunctionDefs) {
            warn("TT: more functions defined than expected");
            ttContext.hintsValid = false;
            return;
          }
          for (var j = 0, jj = ttContext.functionsUsed.length; j < jj; j++) {
            if (j > maxFunctionDefs) {
              warn("TT: invalid function id: " + j);
              ttContext.hintsValid = false;
              return;
            }
            if (ttContext.functionsUsed[j] && !ttContext.functionsDefined[j]) {
              warn("TT: undefined function: " + j);
              ttContext.hintsValid = false;
              return;
            }
          }
        }
  
        function foldTTTable(table, content) {
          if (content.length > 1) {
            // concatenating the content items
            var newLength = 0;
            var j, jj;
            for (j = 0, jj = content.length; j < jj; j++) {
              newLength += content[j].length;
            }
            newLength = (newLength + 3) & ~3;
            var result = new Uint8Array(newLength);
            var pos = 0;
            for (j = 0, jj = content.length; j < jj; j++) {
              result.set(content[j], pos);
              pos += content[j].length;
            }
            table.data = result;
            table.length = newLength;
          }
        }
  
        function sanitizeTTPrograms(fpgm, prep, cvt, maxFunctionDefs) {
          var ttContext = {
            functionsDefined: [],
            functionsUsed: [],
            functionsStackDeltas: [],
            tooComplexToFollowFunctions: false,
            hintsValid: true,
          };
          if (fpgm) {
            sanitizeTTProgram(fpgm, ttContext);
          }
          if (prep) {
            sanitizeTTProgram(prep, ttContext);
          }
          if (fpgm) {
            checkInvalidFunctions(ttContext, maxFunctionDefs);
          }
          if (cvt && cvt.length & 1) {
            var cvtData = new Uint8Array(cvt.length + 1);
            cvtData.set(cvt.data);
            cvt.data = cvtData;
          }
          return ttContext.hintsValid;
        }
  
        // The following steps modify the original font data, making copy
        font = new Stream(new Uint8Array(font.getBytes()));
  
        let header, tables;
        if (isTrueTypeCollectionFile(font)) {
          const ttcData = readTrueTypeCollectionData(font, this.name);
          header = ttcData.header;
          tables = ttcData.tables;
        } else {
          header = readOpenTypeHeader(font);
          tables = readTables(font, header.numTables);
        }
        let cff, cffFile;
  
        var isTrueType = !tables["CFF "];
        if (!isTrueType) {
          const isComposite =
            properties.composite &&
            ((properties.cidToGidMap || []).length > 0 ||
              !(properties.cMap instanceof IdentityCMap));
          // OpenType font (skip composite fonts with non-default glyph mapping).
          if (
            (header.version === "OTTO" && !isComposite) ||
            !tables["head"] ||
            !tables["hhea"] ||
            !tables["maxp"] ||
            !tables["post"]
          ) {
            // No major tables: throwing everything at `CFFFont`.
            cffFile = new Stream(tables["CFF "].data);
            cff = new CFFFont(cffFile, properties);
  
            adjustWidths(properties);
  
            return this.convert(name, cff, properties);
          }
  
          delete tables["glyf"];
          delete tables["loca"];
          delete tables["fpgm"];
          delete tables["prep"];
          delete tables["cvt "];
          this.isOpenType = true;
        } else {
          if (!tables["loca"]) {
            throw new FormatError('Required "loca" table is not found');
          }
          if (!tables["glyf"]) {
            warn('Required "glyf" table is not found -- trying to recover.');
            // Note: We use `sanitizeGlyphLocations` to add dummy glyf data below.
            tables["glyf"] = {
              tag: "glyf",
              data: new Uint8Array(0),
            };
          }
          this.isOpenType = false;
        }
  
        if (!tables["maxp"]) {
          throw new FormatError('Required "maxp" table is not found');
        }
  
        font.pos = (font.start || 0) + tables["maxp"].offset;
        var version = font.getInt32();
        const numGlyphs = font.getUint16();
        // Glyph 0 is duplicated and appended.
        let numGlyphsOut = numGlyphs + 1;
        let dupFirstEntry = true;
        if (numGlyphsOut > 0xffff) {
          dupFirstEntry = false;
          numGlyphsOut = numGlyphs;
          warn("Not enough space in glyfs to duplicate first glyph.");
        }
        var maxFunctionDefs = 0;
        var maxSizeOfInstructions = 0;
        if (version >= 0x00010000 && tables["maxp"].length >= 22) {
          // maxZones can be invalid
          font.pos += 8;
          var maxZones = font.getUint16();
          if (maxZones > 2) {
            // reset to 2 if font has invalid maxZones
            tables["maxp"].data[14] = 0;
            tables["maxp"].data[15] = 2;
          }
          font.pos += 4;
          maxFunctionDefs = font.getUint16();
          font.pos += 4;
          maxSizeOfInstructions = font.getUint16();
        }
  
        tables["maxp"].data[4] = numGlyphsOut >> 8;
        tables["maxp"].data[5] = numGlyphsOut & 255;
  
        var hintsValid = sanitizeTTPrograms(
          tables["fpgm"],
          tables["prep"],
          tables["cvt "],
          maxFunctionDefs
        );
        if (!hintsValid) {
          delete tables["fpgm"];
          delete tables["prep"];
          delete tables["cvt "];
        }
  
        // Ensure the hmtx table contains the advance width and
        // sidebearings information for numGlyphs in the maxp table
        sanitizeMetrics(
          font,
          tables["hhea"],
          tables["hmtx"],
          numGlyphsOut,
          dupFirstEntry
        );
  
        if (!tables["head"]) {
          throw new FormatError('Required "head" table is not found');
        }
  
        sanitizeHead(
          tables["head"],
          numGlyphs,
          isTrueType ? tables["loca"].length : 0
        );
  
        var missingGlyphs = Object.create(null);
        if (isTrueType) {
          var isGlyphLocationsLong = int16(
            tables["head"].data[50],
            tables["head"].data[51]
          );
          var glyphsInfo = sanitizeGlyphLocations(
            tables["loca"],
            tables["glyf"],
            numGlyphs,
            isGlyphLocationsLong,
            hintsValid,
            dupFirstEntry,
            maxSizeOfInstructions
          );
          missingGlyphs = glyphsInfo.missingGlyphs;
  
          // Some fonts have incorrect maxSizeOfInstructions values, so we use
          // the computed value instead.
          if (version >= 0x00010000 && tables["maxp"].length >= 22) {
            tables["maxp"].data[26] = glyphsInfo.maxSizeOfInstructions >> 8;
            tables["maxp"].data[27] = glyphsInfo.maxSizeOfInstructions & 255;
          }
        }
        if (!tables["hhea"]) {
          throw new FormatError('Required "hhea" table is not found');
        }
  
        // Sanitizer reduces the glyph advanceWidth to the maxAdvanceWidth
        // Sometimes it's 0. That needs to be fixed
        if (tables["hhea"].data[10] === 0 && tables["hhea"].data[11] === 0) {
          tables["hhea"].data[10] = 0xff;
          tables["hhea"].data[11] = 0xff;
        }
  
        // Extract some more font properties from the OpenType head and
        // hhea tables; yMin and descent value are always negative.
        var metricsOverride = {
          unitsPerEm: int16(tables["head"].data[18], tables["head"].data[19]),
          yMax: int16(tables["head"].data[42], tables["head"].data[43]),
          yMin: signedInt16(tables["head"].data[38], tables["head"].data[39]),
          ascent: int16(tables["hhea"].data[4], tables["hhea"].data[5]),
          descent: signedInt16(tables["hhea"].data[6], tables["hhea"].data[7]),
        };
  
        // PDF FontDescriptor metrics lie -- using data from actual font.
        this.ascent = metricsOverride.ascent / metricsOverride.unitsPerEm;
        this.descent = metricsOverride.descent / metricsOverride.unitsPerEm;
  
        // The 'post' table has glyphs names.
        if (tables["post"]) {
          readPostScriptTable(tables["post"], properties, numGlyphs);
        }
  
        // The original 'post' table is not needed, replace it.
        tables["post"] = {
          tag: "post",
          data: createPostTable(properties),
        };
  
        const charCodeToGlyphId = [];
  
        // Helper function to try to skip mapping of empty glyphs.
        function hasGlyph(glyphId) {
          return !missingGlyphs[glyphId];
        }
  
        if (properties.composite) {
          var cidToGidMap = properties.cidToGidMap || [];
          var isCidToGidMapEmpty = cidToGidMap.length === 0;
  
          properties.cMap.forEach(function (charCode, cid) {
            if (cid > 0xffff) {
              throw new FormatError("Max size of CID is 65,535");
            }
            var glyphId = -1;
            if (isCidToGidMapEmpty) {
              glyphId = cid;
            } else if (cidToGidMap[cid] !== undefined) {
              glyphId = cidToGidMap[cid];
            }
  
            if (glyphId >= 0 && glyphId < numGlyphs && hasGlyph(glyphId)) {
              charCodeToGlyphId[charCode] = glyphId;
            }
          });
        } else {
          // Most of the following logic in this code branch is based on the
          // 9.6.6.4 of the PDF spec.
          var cmapTable = readCmapTable(
            tables["cmap"],
            font,
            this.isSymbolicFont,
            properties.hasEncoding
          );
          var cmapPlatformId = cmapTable.platformId;
          var cmapEncodingId = cmapTable.encodingId;
          var cmapMappings = cmapTable.mappings;
          var cmapMappingsLength = cmapMappings.length;
  
          // The spec seems to imply that if the font is symbolic the encoding
          // should be ignored, this doesn't appear to work for 'preistabelle.pdf'
          // where the the font is symbolic and it has an encoding.
          if (
            (properties.hasEncoding &&
              ((cmapPlatformId === 3 && cmapEncodingId === 1) ||
                (cmapPlatformId === 1 && cmapEncodingId === 0))) ||
            (cmapPlatformId === -1 &&
            cmapEncodingId === -1 && // Temporary hack
              !!getEncoding(properties.baseEncodingName))
          ) {
            // Temporary hack
            // When no preferred cmap table was found and |baseEncodingName| is
            // one of the predefined encodings, we seem to obtain a better
            // |charCodeToGlyphId| map from the code below (fixes bug 1057544).
            // TODO: Note that this is a hack which should be removed as soon as
            //       we have proper support for more exotic cmap tables.
  
            var baseEncoding = [];
            if (
              properties.baseEncodingName === "MacRomanEncoding" ||
              properties.baseEncodingName === "WinAnsiEncoding"
            ) {
              baseEncoding = getEncoding(properties.baseEncodingName);
            }
            var glyphsUnicodeMap = getGlyphsUnicode();
            for (let charCode = 0; charCode < 256; charCode++) {
              var glyphName, standardGlyphName;
              if (this.differences && charCode in this.differences) {
                glyphName = this.differences[charCode];
              } else if (
                charCode in baseEncoding &&
                baseEncoding[charCode] !== ""
              ) {
                glyphName = baseEncoding[charCode];
              } else {
                glyphName = StandardEncoding[charCode];
              }
              if (!glyphName) {
                continue;
              }
              // Ensure that non-standard glyph names are resolved to valid ones.
              standardGlyphName = recoverGlyphName(glyphName, glyphsUnicodeMap);
  
              var unicodeOrCharCode;
              if (cmapPlatformId === 3 && cmapEncodingId === 1) {
                unicodeOrCharCode = glyphsUnicodeMap[standardGlyphName];
              } else if (cmapPlatformId === 1 && cmapEncodingId === 0) {
                // TODO: the encoding needs to be updated with mac os table.
                unicodeOrCharCode = MacRomanEncoding.indexOf(standardGlyphName);
              }
  
              var found = false;
              for (let i = 0; i < cmapMappingsLength; ++i) {
                if (cmapMappings[i].charCode !== unicodeOrCharCode) {
                  continue;
                }
                charCodeToGlyphId[charCode] = cmapMappings[i].glyphId;
                found = true;
                break;
              }
              if (!found && properties.glyphNames) {
                // Try to map using the post table.
                var glyphId = properties.glyphNames.indexOf(glyphName);
                // The post table ought to use the same kind of glyph names as the
                // `differences` array, but check the standard ones as a fallback.
                if (glyphId === -1 && standardGlyphName !== glyphName) {
                  glyphId = properties.glyphNames.indexOf(standardGlyphName);
                }
                if (glyphId > 0 && hasGlyph(glyphId)) {
                  charCodeToGlyphId[charCode] = glyphId;
                }
              }
            }
          } else if (cmapPlatformId === 0 && cmapEncodingId === 0) {
            // Default Unicode semantics, use the charcodes as is.
            for (let i = 0; i < cmapMappingsLength; ++i) {
              charCodeToGlyphId[cmapMappings[i].charCode] =
                cmapMappings[i].glyphId;
            }
          } else {
            // When there is only a (1, 0) cmap table, the char code is a single
            // byte and it is used directly as the char code.
  
            // When a (3, 0) cmap table is present, it is used instead but the
            // spec has special rules for char codes in the range of 0xF000 to
            // 0xF0FF and it says the (3, 0) table should map the values from
            // the (1, 0) table by prepending 0xF0 to the char codes. To reverse
            // this, the upper bits of the char code are cleared, but only for the
            // special range since some PDFs have char codes outside of this range
            // (e.g. 0x2013) which when masked would overwrite other values in the
            // cmap.
            for (let i = 0; i < cmapMappingsLength; ++i) {
              let charCode = cmapMappings[i].charCode;
              if (
                cmapPlatformId === 3 &&
                charCode >= 0xf000 &&
                charCode <= 0xf0ff
              ) {
                charCode &= 0xff;
              }
              charCodeToGlyphId[charCode] = cmapMappings[i].glyphId;
            }
          }
        }
  
        if (charCodeToGlyphId.length === 0) {
          // defines at least one glyph
          charCodeToGlyphId[0] = 0;
        }
  
        // Typically glyph 0 is duplicated and the mapping must be updated, but if
        // there isn't enough room to duplicate, the glyph id is left the same. In
        // this case, glyph 0 may not work correctly, but that is better than
        // having the whole font fail.
        let glyphZeroId = numGlyphsOut - 1;
        if (!dupFirstEntry) {
          glyphZeroId = 0;
        }
  
        // Converting glyphs and ids into font's cmap table
        var newMapping = adjustMapping(charCodeToGlyphId, hasGlyph, glyphZeroId);
        this.toFontChar = newMapping.toFontChar;
        tables["cmap"] = {
          tag: "cmap",
          data: createCmapTable(newMapping.charCodeToGlyphId, numGlyphsOut),
        };
  
        if (!tables["OS/2"] || !validateOS2Table(tables["OS/2"])) {
          tables["OS/2"] = {
            tag: "OS/2",
            data: createOS2Table(
              properties,
              newMapping.charCodeToGlyphId,
              metricsOverride
            ),
          };
        }
  
        if (!isTrueType) {
          try {
            // Trying to repair CFF file
            cffFile = new Stream(tables["CFF "].data);
            var parser = new CFFParser(
              cffFile,
              properties,
              SEAC_ANALYSIS_ENABLED
            );
            cff = parser.parse();
            cff.duplicateFirstGlyph();
            var compiler = new CFFCompiler(cff);
            tables["CFF "].data = compiler.compile();
          } catch (e) {
            warn("Failed to compile font " + properties.loadedName);
          }
        }
  
        // Re-creating 'name' table
        if (!tables["name"]) {
          tables["name"] = {
            tag: "name",
            data: createNameTable(this.name),
          };
        } else {
          // ... using existing 'name' table as prototype
          var namePrototype = readNameTable(tables["name"]);
          tables["name"].data = createNameTable(name, namePrototype);
        }
  
        var builder = new OpenTypeFileBuilder(header.version);
        for (var tableTag in tables) {
          builder.addTable(tableTag, tables[tableTag].data);
        }
        return builder.toArray();
      },
  
      convert: function Font_convert(fontName, font, properties) {
        // TODO: Check the charstring widths to determine this.
        properties.fixedPitch = false;
  
        if (properties.builtInEncoding) {
          // For Type1 fonts that do not include either `ToUnicode` or `Encoding`
          // data, attempt to use the `builtInEncoding` to improve text selection.
          adjustToUnicode(properties, properties.builtInEncoding);
        }
  
        // Type 1 fonts have a notdef inserted at the beginning, so glyph 0
        // becomes glyph 1. In a CFF font glyph 0 is appended to the end of the
        // char strings.
        let glyphZeroId = 1;
        if (font instanceof CFFFont) {
          glyphZeroId = font.numGlyphs - 1;
        }
        var mapping = font.getGlyphMapping(properties);
        var newMapping = adjustMapping(
          mapping,
          font.hasGlyphId.bind(font),
          glyphZeroId
        );
        this.toFontChar = newMapping.toFontChar;
        var numGlyphs = font.numGlyphs;
  
        function getCharCodes(charCodeToGlyphId, glyphId) {
          var charCodes = null;
          for (var charCode in charCodeToGlyphId) {
            if (glyphId === charCodeToGlyphId[charCode]) {
              if (!charCodes) {
                charCodes = [];
              }
              charCodes.push(charCode | 0);
            }
          }
          return charCodes;
        }
  
        function createCharCode(charCodeToGlyphId, glyphId) {
          for (var charCode in charCodeToGlyphId) {
            if (glyphId === charCodeToGlyphId[charCode]) {
              return charCode | 0;
            }
          }
          newMapping.charCodeToGlyphId[
            newMapping.nextAvailableFontCharCode
          ] = glyphId;
          return newMapping.nextAvailableFontCharCode++;
        }
  
        var seacs = font.seacs;
        if (SEAC_ANALYSIS_ENABLED && seacs && seacs.length) {
          var matrix = properties.fontMatrix || FONT_IDENTITY_MATRIX;
          var charset = font.getCharset();
          var seacMap = Object.create(null);
          for (var glyphId in seacs) {
            glyphId |= 0;
            var seac = seacs[glyphId];
            var baseGlyphName = StandardEncoding[seac[2]];
            var accentGlyphName = StandardEncoding[seac[3]];
            var baseGlyphId = charset.indexOf(baseGlyphName);
            var accentGlyphId = charset.indexOf(accentGlyphName);
            if (baseGlyphId < 0 || accentGlyphId < 0) {
              continue;
            }
            var accentOffset = {
              x: seac[0] * matrix[0] + seac[1] * matrix[2] + matrix[4],
              y: seac[0] * matrix[1] + seac[1] * matrix[3] + matrix[5],
            };
  
            var charCodes = getCharCodes(mapping, glyphId);
            if (!charCodes) {
              // There's no point in mapping it if the char code was never mapped
              // to begin with.
              continue;
            }
            for (let i = 0, ii = charCodes.length; i < ii; i++) {
              var charCode = charCodes[i];
              // Find a fontCharCode that maps to the base and accent glyphs.
              // If one doesn't exists, create it.
              var charCodeToGlyphId = newMapping.charCodeToGlyphId;
              var baseFontCharCode = createCharCode(
                charCodeToGlyphId,
                baseGlyphId
              );
              var accentFontCharCode = createCharCode(
                charCodeToGlyphId,
                accentGlyphId
              );
              seacMap[charCode] = {
                baseFontCharCode,
                accentFontCharCode,
                accentOffset,
              };
            }
          }
          properties.seacMap = seacMap;
        }
  
        var unitsPerEm = 1 / (properties.fontMatrix || FONT_IDENTITY_MATRIX)[0];
  
        var builder = new OpenTypeFileBuilder("\x4F\x54\x54\x4F");
        // PostScript Font Program
        builder.addTable("CFF ", font.data);
        // OS/2 and Windows Specific metrics
        builder.addTable(
          "OS/2",
          createOS2Table(properties, newMapping.charCodeToGlyphId)
        );
        // Character to glyphs mapping
        builder.addTable(
          "cmap",
          createCmapTable(newMapping.charCodeToGlyphId, numGlyphs)
        );
        // Font header
        builder.addTable(
          "head",
          "\x00\x01\x00\x00" + // Version number
          "\x00\x00\x10\x00" + // fontRevision
          "\x00\x00\x00\x00" + // checksumAdjustement
          "\x5F\x0F\x3C\xF5" + // magicNumber
          "\x00\x00" + // Flags
          safeString16(unitsPerEm) + // unitsPerEM
          "\x00\x00\x00\x00\x9e\x0b\x7e\x27" + // creation date
          "\x00\x00\x00\x00\x9e\x0b\x7e\x27" + // modifification date
          "\x00\x00" + // xMin
          safeString16(properties.descent) + // yMin
          "\x0F\xFF" + // xMax
          safeString16(properties.ascent) + // yMax
          string16(properties.italicAngle ? 2 : 0) + // macStyle
          "\x00\x11" + // lowestRecPPEM
          "\x00\x00" + // fontDirectionHint
          "\x00\x00" + // indexToLocFormat
            "\x00\x00"
        ); // glyphDataFormat
  
        // Horizontal header
        builder.addTable(
          "hhea",
          "\x00\x01\x00\x00" + // Version number
          safeString16(properties.ascent) + // Typographic Ascent
          safeString16(properties.descent) + // Typographic Descent
          "\x00\x00" + // Line Gap
          "\xFF\xFF" + // advanceWidthMax
          "\x00\x00" + // minLeftSidebearing
          "\x00\x00" + // minRightSidebearing
          "\x00\x00" + // xMaxExtent
          safeString16(properties.capHeight) + // caretSlopeRise
          safeString16(Math.tan(properties.italicAngle) * properties.xHeight) + // caretSlopeRun
          "\x00\x00" + // caretOffset
          "\x00\x00" + // -reserved-
          "\x00\x00" + // -reserved-
          "\x00\x00" + // -reserved-
          "\x00\x00" + // -reserved-
          "\x00\x00" + // metricDataFormat
            string16(numGlyphs)
        ); // Number of HMetrics
  
        // Horizontal metrics
        builder.addTable(
          "hmtx",
          (function fontFieldsHmtx() {
            var charstrings = font.charstrings;
            var cffWidths = font.cff ? font.cff.widths : null;
            var hmtx = "\x00\x00\x00\x00"; // Fake .notdef
            for (let i = 1, ii = numGlyphs; i < ii; i++) {
              var width = 0;
              if (charstrings) {
                var charstring = charstrings[i - 1];
                width = "width" in charstring ? charstring.width : 0;
              } else if (cffWidths) {
                width = Math.ceil(cffWidths[i] || 0);
              }
              hmtx += string16(width) + string16(0);
            }
            return hmtx;
          })()
        );
  
        // Maximum profile
        builder.addTable(
          "maxp",
          "\x00\x00\x50\x00" + string16(numGlyphs) // Version number
        ); // Num of glyphs
  
        // Naming tables
        builder.addTable("name", createNameTable(fontName));
  
        // PostScript information
        builder.addTable("post", createPostTable(properties));
  
        return builder.toArray();
      },
  
      get spaceWidth() {
        // trying to estimate space character width
        var possibleSpaceReplacements = ["space", "minus", "one", "i", "I"];
        var width;
        for (var i = 0, ii = possibleSpaceReplacements.length; i < ii; i++) {
          var glyphName = possibleSpaceReplacements[i];
          // if possible, getting width by glyph name
          if (glyphName in this.widths) {
            width = this.widths[glyphName];
            break;
          }
          var glyphsUnicodeMap = getGlyphsUnicode();
          var glyphUnicode = glyphsUnicodeMap[glyphName];
          // finding the charcode via unicodeToCID map
          var charcode = 0;
          if (this.composite && this.cMap.contains(glyphUnicode)) {
            charcode = this.cMap.lookup(glyphUnicode);
          }
          // ... via toUnicode map
          if (!charcode && this.toUnicode) {
            charcode = this.toUnicode.charCodeOf(glyphUnicode);
          }
          // setting it to unicode if negative or undefined
          if (charcode <= 0) {
            charcode = glyphUnicode;
          }
          // trying to get width via charcode
          width = this.widths[charcode];
          if (width) {
            break; // the non-zero width found
          }
        }
        width = width || this.defaultWidth;
        return shadow(this, "spaceWidth", width);
      },
  
      charToGlyph: function Font_charToGlyph(charcode, isSpace) {
        var fontCharCode, width, operatorListId;
  
        var widthCode = charcode;
        if (this.cMap && this.cMap.contains(charcode)) {
          widthCode = this.cMap.lookup(charcode);
        }
        width = this.widths[widthCode];
        width = isNum(width) ? width : this.defaultWidth;
        var vmetric = this.vmetrics && this.vmetrics[widthCode];
  
        let unicode =
          this.toUnicode.get(charcode) ||
          this.fallbackToUnicode.get(charcode) ||
          charcode;
        if (typeof unicode === "number") {
          unicode = String.fromCharCode(unicode);
        }
  
        var isInFont = charcode in this.toFontChar;
        // First try the toFontChar map, if it's not there then try falling
        // back to the char code.
        fontCharCode = this.toFontChar[charcode] || charcode;
        if (this.missingFile) {
          const glyphName =
            this.differences[charcode] || this.defaultEncoding[charcode];
          if (
            (glyphName === ".notdef" || glyphName === "") &&
            this.type === "Type1"
          ) {
            // .notdef glyphs should be invisible in non-embedded Type1 fonts, so
            // replace them with spaces.
            fontCharCode = 0x20;
          }
          fontCharCode = mapSpecialUnicodeValues(fontCharCode);
        }
  
        if (this.isType3Font) {
          // Font char code in this case is actually a glyph name.
          operatorListId = fontCharCode;
        }
  
        var accent = null;
        if (this.seacMap && this.seacMap[charcode]) {
          isInFont = true;
          var seac = this.seacMap[charcode];
          fontCharCode = seac.baseFontCharCode;
          accent = {
            fontChar: String.fromCodePoint(seac.accentFontCharCode),
            offset: seac.accentOffset,
          };
        }
  
        let fontChar = "";
        if (typeof fontCharCode === "number") {
          if (fontCharCode <= 0x10ffff) {
            fontChar = String.fromCodePoint(fontCharCode);
          } else {
            warn(`charToGlyph - invalid fontCharCode: ${fontCharCode}`);
          }
        }
  
        var glyph = this.glyphCache[charcode];
        if (
          !glyph ||
          !glyph.matchesForCache(
            fontChar,
            unicode,
            accent,
            width,
            vmetric,
            operatorListId,
            isSpace,
            isInFont
          )
        ) {
          glyph = new Glyph(
            fontChar,
            unicode,
            accent,
            width,
            vmetric,
            operatorListId,
            isSpace,
            isInFont
          );
          this.glyphCache[charcode] = glyph;
        }
        return glyph;
      },
  
      charsToGlyphs: function Font_charsToGlyphs(chars) {
        var charsCache = this.charsCache;
        var glyphs, glyph, charcode;
  
        // if we translated this string before, just grab it from the cache
        if (charsCache) {
          glyphs = charsCache[chars];
          if (glyphs) {
            return glyphs;
          }
        }
  
        // lazily create the translation cache
        if (!charsCache) {
          charsCache = this.charsCache = Object.create(null);
        }
  
        glyphs = [];
        var charsCacheKey = chars;
        var i = 0,
          ii;
  
        if (this.cMap) {
          // composite fonts have multi-byte strings convert the string from
          // single-byte to multi-byte
          var c = Object.create(null);
          while (i < chars.length) {
            this.cMap.readCharCode(chars, i, c);
            charcode = c.charcode;
            var length = c.length;
            i += length;
            // Space is char with code 0x20 and length 1 in multiple-byte codes.
            var isSpace = length === 1 && chars.charCodeAt(i - 1) === 0x20;
            glyph = this.charToGlyph(charcode, isSpace);
            glyphs.push(glyph);
          }
        } else {
          for (i = 0, ii = chars.length; i < ii; ++i) {
            charcode = chars.charCodeAt(i);
            glyph = this.charToGlyph(charcode, charcode === 0x20);
            glyphs.push(glyph);
          }
        }
  
        // Enter the translated string into the cache
        return (charsCache[charsCacheKey] = glyphs);
      },
  
      get glyphCacheValues() {
        return Object.values(this.glyphCache);
      },
    };
  
    return Font;
  })();
  
  var ErrorFont = (function ErrorFontClosure() {
    // eslint-disable-next-line no-shadow
    function ErrorFont(error) {
      this.error = error;
      this.loadedName = "g_font_error";
      this.missingFile = true;
    }
  
    ErrorFont.prototype = {
      charsToGlyphs: function ErrorFont_charsToGlyphs() {
        return [];
      },
      exportData(extraProperties = false) {
        return { error: this.error };
      },
    };
  
    return ErrorFont;
  })();
  
  /**
   * Shared logic for building a char code to glyph id mapping for Type1 and
   * simple CFF fonts. See section 9.6.6.2 of the spec.
   * @param {Object} properties Font properties object.
   * @param {Object} builtInEncoding The encoding contained within the actual font
   * data.
   * @param {Array} glyphNames Array of glyph names where the index is the
   * glyph ID.
   * @returns {Object} A char code to glyph ID map.
   */
  function type1FontGlyphMapping(properties, builtInEncoding, glyphNames) {
    var charCodeToGlyphId = Object.create(null);
    var glyphId, charCode, baseEncoding;
    var isSymbolicFont = !!(properties.flags & FontFlags.Symbolic);
  
    if (properties.baseEncodingName) {
      // If a valid base encoding name was used, the mapping is initialized with
      // that.
      baseEncoding = getEncoding(properties.baseEncodingName);
      for (charCode = 0; charCode < baseEncoding.length; charCode++) {
        glyphId = glyphNames.indexOf(baseEncoding[charCode]);
        if (glyphId >= 0) {
          charCodeToGlyphId[charCode] = glyphId;
        } else {
          charCodeToGlyphId[charCode] = 0; // notdef
        }
      }
    } else if (isSymbolicFont) {
      // For a symbolic font the encoding should be the fonts built-in encoding.
      for (charCode in builtInEncoding) {
        charCodeToGlyphId[charCode] = builtInEncoding[charCode];
      }
    } else {
      // For non-symbolic fonts that don't have a base encoding the standard
      // encoding should be used.
      baseEncoding = StandardEncoding;
      for (charCode = 0; charCode < baseEncoding.length; charCode++) {
        glyphId = glyphNames.indexOf(baseEncoding[charCode]);
        if (glyphId >= 0) {
          charCodeToGlyphId[charCode] = glyphId;
        } else {
          charCodeToGlyphId[charCode] = 0; // notdef
        }
      }
    }
  
    // Lastly, merge in the differences.
    var differences = properties.differences,
      glyphsUnicodeMap;
    if (differences) {
      for (charCode in differences) {
        var glyphName = differences[charCode];
        glyphId = glyphNames.indexOf(glyphName);
  
        if (glyphId === -1) {
          if (!glyphsUnicodeMap) {
            glyphsUnicodeMap = getGlyphsUnicode();
          }
          var standardGlyphName = recoverGlyphName(glyphName, glyphsUnicodeMap);
          if (standardGlyphName !== glyphName) {
            glyphId = glyphNames.indexOf(standardGlyphName);
          }
        }
        if (glyphId >= 0) {
          charCodeToGlyphId[charCode] = glyphId;
        } else {
          charCodeToGlyphId[charCode] = 0; // notdef
        }
      }
    }
    return charCodeToGlyphId;
  }
  
  // Type1Font is also a CIDFontType0.
  var Type1Font = (function Type1FontClosure() {
    function findBlock(streamBytes, signature, startIndex) {
      var streamBytesLength = streamBytes.length;
      var signatureLength = signature.length;
      var scanLength = streamBytesLength - signatureLength;
  
      var i = startIndex,
        j,
        found = false;
      while (i < scanLength) {
        j = 0;
        while (j < signatureLength && streamBytes[i + j] === signature[j]) {
          j++;
        }
        if (j >= signatureLength) {
          // `signature` found, skip over whitespace.
          i += j;
          while (i < streamBytesLength && isWhiteSpace(streamBytes[i])) {
            i++;
          }
          found = true;
          break;
        }
        i++;
      }
      return {
        found,
        length: i,
      };
    }
  
    function getHeaderBlock(stream, suggestedLength) {
      var EEXEC_SIGNATURE = [0x65, 0x65, 0x78, 0x65, 0x63];
  
      var streamStartPos = stream.pos; // Save the initial stream position.
      var headerBytes, headerBytesLength, block;
      try {
        headerBytes = stream.getBytes(suggestedLength);
        headerBytesLength = headerBytes.length;
      } catch (ex) {
        if (ex instanceof MissingDataException) {
          throw ex;
        }
        // Ignore errors if the `suggestedLength` is huge enough that a Uint8Array
        // cannot hold the result of `getBytes`, and fallback to simply checking
        // the entire stream (fixes issue3928.pdf).
      }
  
      if (headerBytesLength === suggestedLength) {
        // Most of the time `suggestedLength` is correct, so to speed things up we
        // initially only check the last few bytes to see if the header was found.
        // Otherwise we (potentially) check the entire stream to prevent errors in
        // `Type1Parser` (fixes issue5686.pdf).
        block = findBlock(
          headerBytes,
          EEXEC_SIGNATURE,
          suggestedLength - 2 * EEXEC_SIGNATURE.length
        );
  
        if (block.found && block.length === suggestedLength) {
          return {
            stream: new Stream(headerBytes),
            length: suggestedLength,
          };
        }
      }
      warn('Invalid "Length1" property in Type1 font -- trying to recover.');
      stream.pos = streamStartPos; // Reset the stream position.
  
      var SCAN_BLOCK_LENGTH = 2048;
      var actualLength;
      while (true) {
        var scanBytes = stream.peekBytes(SCAN_BLOCK_LENGTH);
        block = findBlock(scanBytes, EEXEC_SIGNATURE, 0);
  
        if (block.length === 0) {
          break;
        }
        stream.pos += block.length; // Update the stream position.
  
        if (block.found) {
          actualLength = stream.pos - streamStartPos;
          break;
        }
      }
      stream.pos = streamStartPos; // Reset the stream position.
  
      if (actualLength) {
        return {
          stream: new Stream(stream.getBytes(actualLength)),
          length: actualLength,
        };
      }
      warn('Unable to recover "Length1" property in Type1 font -- using as is.');
      return {
        stream: new Stream(stream.getBytes(suggestedLength)),
        length: suggestedLength,
      };
    }
  
    function getEexecBlock(stream, suggestedLength) {
      // We should ideally parse the eexec block to ensure that `suggestedLength`
      // is correct, so we don't truncate the block data if it's too small.
      // However, this would also require checking if the fixed-content portion
      // exists (using the 'Length3' property), and ensuring that it's valid.
      //
      // Given that `suggestedLength` almost always is correct, all the validation
      // would require a great deal of unnecessary parsing for most fonts.
      // To save time, we always fetch the entire stream instead, which also avoid
      // issues if `suggestedLength` is huge (see comment in `getHeaderBlock`).
      //
      // NOTE: This means that the function can include the fixed-content portion
      // in the returned eexec block. In practice this does *not* seem to matter,
      // since `Type1Parser_extractFontProgram` will skip over any non-commands.
      var eexecBytes = stream.getBytes();
      return {
        stream: new Stream(eexecBytes),
        length: eexecBytes.length,
      };
    }
  
    // eslint-disable-next-line no-shadow
    function Type1Font(name, file, properties) {
      // Some bad generators embed pfb file as is, we have to strip 6-byte header.
      // Also, length1 and length2 might be off by 6 bytes as well.
      // http://www.math.ubc.ca/~cass/piscript/type1.pdf
      var PFB_HEADER_SIZE = 6;
      var headerBlockLength = properties.length1;
      var eexecBlockLength = properties.length2;
      var pfbHeader = file.peekBytes(PFB_HEADER_SIZE);
      var pfbHeaderPresent = pfbHeader[0] === 0x80 && pfbHeader[1] === 0x01;
      if (pfbHeaderPresent) {
        file.skip(PFB_HEADER_SIZE);
        headerBlockLength =
          (pfbHeader[5] << 24) |
          (pfbHeader[4] << 16) |
          (pfbHeader[3] << 8) |
          pfbHeader[2];
      }
  
      // Get the data block containing glyphs and subrs information
      var headerBlock = getHeaderBlock(file, headerBlockLength);
      var headerBlockParser = new Type1Parser(
        headerBlock.stream,
        false,
        SEAC_ANALYSIS_ENABLED
      );
      headerBlockParser.extractFontHeader(properties);
  
      if (pfbHeaderPresent) {
        pfbHeader = file.getBytes(PFB_HEADER_SIZE);
        eexecBlockLength =
          (pfbHeader[5] << 24) |
          (pfbHeader[4] << 16) |
          (pfbHeader[3] << 8) |
          pfbHeader[2];
      }
  
      // Decrypt the data blocks and retrieve it's content
      var eexecBlock = getEexecBlock(file, eexecBlockLength);
      var eexecBlockParser = new Type1Parser(
        eexecBlock.stream,
        true,
        SEAC_ANALYSIS_ENABLED
      );
      var data = eexecBlockParser.extractFontProgram(properties);
      for (const key in data.properties) {
        properties[key] = data.properties[key];
      }
  
      var charstrings = data.charstrings;
      var type2Charstrings = this.getType2Charstrings(charstrings);
      var subrs = this.getType2Subrs(data.subrs);
  
      this.charstrings = charstrings;
      this.data = this.wrap(
        name,
        type2Charstrings,
        this.charstrings,
        subrs,
        properties
      );
      this.seacs = this.getSeacs(data.charstrings);
    }
  
    Type1Font.prototype = {
      get numGlyphs() {
        return this.charstrings.length + 1;
      },
  
      getCharset: function Type1Font_getCharset() {
        var charset = [".notdef"];
        var charstrings = this.charstrings;
        for (var glyphId = 0; glyphId < charstrings.length; glyphId++) {
          charset.push(charstrings[glyphId].glyphName);
        }
        return charset;
      },
  
      getGlyphMapping: function Type1Font_getGlyphMapping(properties) {
        var charstrings = this.charstrings;
  
        if (properties.composite) {
          const charCodeToGlyphId = Object.create(null);
          // Map CIDs directly to GIDs.
          for (
            let glyphId = 0, charstringsLen = charstrings.length;
            glyphId < charstringsLen;
            glyphId++
          ) {
            const charCode = properties.cMap.charCodeOf(glyphId);
            // Add 1 because glyph 0 is duplicated.
            charCodeToGlyphId[charCode] = glyphId + 1;
          }
          return charCodeToGlyphId;
        }
  
        var glyphNames = [".notdef"],
          glyphId;
        for (glyphId = 0; glyphId < charstrings.length; glyphId++) {
          glyphNames.push(charstrings[glyphId].glyphName);
        }
        var encoding = properties.builtInEncoding;
        if (encoding) {
          var builtInEncoding = Object.create(null);
          for (var charCode in encoding) {
            glyphId = glyphNames.indexOf(encoding[charCode]);
            if (glyphId >= 0) {
              builtInEncoding[charCode] = glyphId;
            }
          }
        }
  
        return type1FontGlyphMapping(properties, builtInEncoding, glyphNames);
      },
  
      hasGlyphId: function Type1Font_hasGlyphID(id) {
        if (id < 0 || id >= this.numGlyphs) {
          return false;
        }
        if (id === 0) {
          // notdef is always defined.
          return true;
        }
        var glyph = this.charstrings[id - 1];
        return glyph.charstring.length > 0;
      },
  
      getSeacs: function Type1Font_getSeacs(charstrings) {
        var i, ii;
        var seacMap = [];
        for (i = 0, ii = charstrings.length; i < ii; i++) {
          var charstring = charstrings[i];
          if (charstring.seac) {
            // Offset by 1 for .notdef
            seacMap[i + 1] = charstring.seac;
          }
        }
        return seacMap;
      },
  
      getType2Charstrings: function Type1Font_getType2Charstrings(
        type1Charstrings
      ) {
        var type2Charstrings = [];
        for (var i = 0, ii = type1Charstrings.length; i < ii; i++) {
          type2Charstrings.push(type1Charstrings[i].charstring);
        }
        return type2Charstrings;
      },
  
      getType2Subrs: function Type1Font_getType2Subrs(type1Subrs) {
        var bias = 0;
        var count = type1Subrs.length;
        if (count < 1133) {
          bias = 107;
        } else if (count < 33769) {
          bias = 1131;
        } else {
          bias = 32768;
        }
  
        // Add a bunch of empty subrs to deal with the Type2 bias
        var type2Subrs = [];
        var i;
        for (i = 0; i < bias; i++) {
          type2Subrs.push([0x0b]);
        }
  
        for (i = 0; i < count; i++) {
          type2Subrs.push(type1Subrs[i]);
        }
  
        return type2Subrs;
      },
  
      wrap: function Type1Font_wrap(
        name,
        glyphs,
        charstrings,
        subrs,
        properties
      ) {
        var cff = new CFF();
        cff.header = new CFFHeader(1, 0, 4, 4);
  
        cff.names = [name];
  
        var topDict = new CFFTopDict();
        // CFF strings IDs 0...390 are predefined names, so refering
        // to entries in our own String INDEX starts at SID 391.
        topDict.setByName("version", 391);
        topDict.setByName("Notice", 392);
        topDict.setByName("FullName", 393);
        topDict.setByName("FamilyName", 394);
        topDict.setByName("Weight", 395);
        topDict.setByName("Encoding", null); // placeholder
        topDict.setByName("FontMatrix", properties.fontMatrix);
        topDict.setByName("FontBBox", properties.bbox);
        topDict.setByName("charset", null); // placeholder
        topDict.setByName("CharStrings", null); // placeholder
        topDict.setByName("Private", null); // placeholder
        cff.topDict = topDict;
  
        var strings = new CFFStrings();
        strings.add("Version 0.11"); // Version
        strings.add("See original notice"); // Notice
        strings.add(name); // FullName
        strings.add(name); // FamilyName
        strings.add("Medium"); // Weight
        cff.strings = strings;
  
        cff.globalSubrIndex = new CFFIndex();
  
        var count = glyphs.length;
        var charsetArray = [".notdef"];
        var i, ii;
        for (i = 0; i < count; i++) {
          const glyphName = charstrings[i].glyphName;
          const index = CFFStandardStrings.indexOf(glyphName);
          if (index === -1) {
            strings.add(glyphName);
          }
          charsetArray.push(glyphName);
        }
        cff.charset = new CFFCharset(false, 0, charsetArray);
  
        var charStringsIndex = new CFFIndex();
        charStringsIndex.add([0x8b, 0x0e]); // .notdef
        for (i = 0; i < count; i++) {
          charStringsIndex.add(glyphs[i]);
        }
        cff.charStrings = charStringsIndex;
  
        var privateDict = new CFFPrivateDict();
        privateDict.setByName("Subrs", null); // placeholder
        var fields = [
          "BlueValues",
          "OtherBlues",
          "FamilyBlues",
          "FamilyOtherBlues",
          "StemSnapH",
          "StemSnapV",
          "BlueShift",
          "BlueFuzz",
          "BlueScale",
          "LanguageGroup",
          "ExpansionFactor",
          "ForceBold",
          "StdHW",
          "StdVW",
        ];
        for (i = 0, ii = fields.length; i < ii; i++) {
          var field = fields[i];
          if (!(field in properties.privateData)) {
            continue;
          }
          var value = properties.privateData[field];
          if (Array.isArray(value)) {
            // All of the private dictionary array data in CFF must be stored as
            // "delta-encoded" numbers.
            for (var j = value.length - 1; j > 0; j--) {
              value[j] -= value[j - 1]; // ... difference from previous value
            }
          }
          privateDict.setByName(field, value);
        }
        cff.topDict.privateDict = privateDict;
  
        var subrIndex = new CFFIndex();
        for (i = 0, ii = subrs.length; i < ii; i++) {
          subrIndex.add(subrs[i]);
        }
        privateDict.subrsIndex = subrIndex;
  
        var compiler = new CFFCompiler(cff);
        return compiler.compile();
      },
    };
  
    return Type1Font;
  })();
  
  var CFFFont = (function CFFFontClosure() {
    // eslint-disable-next-line no-shadow
    function CFFFont(file, properties) {
      this.properties = properties;
  
      var parser = new CFFParser(file, properties, SEAC_ANALYSIS_ENABLED);
      this.cff = parser.parse();
      this.cff.duplicateFirstGlyph();
      var compiler = new CFFCompiler(this.cff);
      this.seacs = this.cff.seacs;
      try {
        this.data = compiler.compile();
      } catch (e) {
        warn("Failed to compile font " + properties.loadedName);
        // There may have just been an issue with the compiler, set the data
        // anyway and hope the font loaded.
        this.data = file;
      }
    }
  
    CFFFont.prototype = {
      get numGlyphs() {
        return this.cff.charStrings.count;
      },
      getCharset: function CFFFont_getCharset() {
        return this.cff.charset.charset;
      },
      getGlyphMapping: function CFFFont_getGlyphMapping() {
        var cff = this.cff;
        var properties = this.properties;
        var charsets = cff.charset.charset;
        var charCodeToGlyphId;
        var glyphId;
  
        if (properties.composite) {
          charCodeToGlyphId = Object.create(null);
          let charCode;
          if (cff.isCIDFont) {
            // If the font is actually a CID font then we should use the charset
            // to map CIDs to GIDs.
            for (glyphId = 0; glyphId < charsets.length; glyphId++) {
              var cid = charsets[glyphId];
              charCode = properties.cMap.charCodeOf(cid);
              charCodeToGlyphId[charCode] = glyphId;
            }
          } else {
            // If it is NOT actually a CID font then CIDs should be mapped
            // directly to GIDs.
            for (glyphId = 0; glyphId < cff.charStrings.count; glyphId++) {
              charCode = properties.cMap.charCodeOf(glyphId);
              charCodeToGlyphId[charCode] = glyphId;
            }
          }
          return charCodeToGlyphId;
        }
  
        var encoding = cff.encoding ? cff.encoding.encoding : null;
        charCodeToGlyphId = type1FontGlyphMapping(properties, encoding, charsets);
        return charCodeToGlyphId;
      },
      hasGlyphId: function CFFFont_hasGlyphID(id) {
        return this.cff.hasGlyphId(id);
      },
    };
  
    return CFFFont;
  })();
  
  export {
    SEAC_ANALYSIS_ENABLED,
    ErrorFont,
    Font,
    FontFlags,
    ToUnicodeMap,
    IdentityToUnicodeMap,
    getFontType,
  };
  