@azinformatica/pdfjs-dist/lib/core/fonts.js

Generic build of Mozilla's PDF.js library. (FORK)

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

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

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

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

var _fonts_utils = require("./fonts_utils.js");

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

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

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

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

var _to_unicode_map = require("./to_unicode_map.js");

var _cff_font = require("./cff_font.js");

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

var _glyf = require("./glyf.js");

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

var _opentype_file_builder = require("./opentype_file_builder.js");

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

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

var _type1_font = require("./type1_font.js");

const PRIVATE_USE_AREAS = [[0xe000, 0xf8ff], [0x100000, 0x10fffd]];
const PDF_GLYPH_SPACE_UNITS = 1000;
const EXPORT_DATA_PROPERTIES = ["ascent", "bbox", "black", "bold", "charProcOperatorList", "composite", "cssFontInfo", "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"];

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

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

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

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

  properties.defaultWidth *= scale;
}

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

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

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

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

  for (const charCode in builtInEncoding) {
    if (properties.hasIncludedToUnicodeMap) {
      if (properties.toUnicode.has(charCode)) {
        continue;
      }
    } else {
      if (properties.hasEncoding && properties.differences[charCode] !== undefined) {
        continue;
      }
    }

    const glyphName = builtInEncoding[charCode];
    const unicode = (0, _unicode.getUnicodeForGlyph)(glyphName, glyphsUnicodeMap);

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

  if (toUnicode.length > 0) {
    properties.toUnicode.amend(toUnicode);
  }
}

function amendFallbackToUnicode(properties) {
  if (!properties.fallbackToUnicode) {
    return;
  }

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

  const toUnicode = [];

  for (const charCode in properties.fallbackToUnicode) {
    if (properties.toUnicode.has(charCode)) {
      continue;
    }

    toUnicode[charCode] = properties.fallbackToUnicode[charCode];
  }

  if (toUnicode.length > 0) {
    properties.toUnicode.amend(toUnicode);
  }
}

class Glyph {
  constructor(originalCharCode, fontChar, unicode, accent, width, vmetric, operatorListId, isSpace, isInFont) {
    this.originalCharCode = originalCharCode;
    this.fontChar = fontChar;
    this.unicode = unicode;
    this.accent = accent;
    this.width = width;
    this.vmetric = vmetric;
    this.operatorListId = operatorListId;
    this.isSpace = isSpace;
    this.isInFont = isInFont;
  }

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

}

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

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

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

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

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

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

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

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

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

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

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

  return false;
}

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

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

  return false;
}

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

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

  return [fileType, fileSubtype];
}

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

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

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

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

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

  return toFontChar;
}

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

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

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

    if (nextAvailableFontCharCode > privateUseOffetEnd) {
      privateUseAreaIndex++;

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

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

    const fontCharCode = nextAvailableFontCharCode++;

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

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

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

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

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

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

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

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

  for (let n = 0; n < length;) {
    const start = codes[n].fontCharCode;
    const codeIndices = [codes[n].glyphId];
    ++n;
    let 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) {
  const ranges = getRanges(glyphs, numGlyphs);
  const numTables = ranges[ranges.length - 1][1] > 0xffff ? 2 : 1;
  let cmap = "\x00\x00" + string16(numTables) + "\x00\x03" + "\x00\x01" + (0, _util.string32)(4 + numTables * 8);
  let i, ii, j, jj;

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

  const bmpLength = i + 1;

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

  const trailingRangesCount = ranges[i][1] < 0xffff ? 1 : 0;
  const segCount = bmpLength + trailingRangesCount;

  const searchParams = _opentype_file_builder.OpenTypeFileBuilder.getSearchParams(segCount, 2);

  let startCount = "";
  let endCount = "";
  let idDeltas = "";
  let idRangeOffsets = "";
  let glyphsIds = "";
  let bias = 0;
  let 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];
    let contiguous = true;

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

    if (!contiguous) {
      const 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 {
      const 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";
  }

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

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

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

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

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

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

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

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

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

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

  if (firstChar > lastChar) {
    return false;
  }

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

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

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

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

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

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

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

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

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

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

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

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

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

function createPostTable(properties) {
  const angle = Math.floor(properties.italicAngle * 2 ** 16);
  return "\x00\x03\x00\x00" + (0, _util.string32)(angle) + "\x00\x00" + "\x00\x00" + (0, _util.string32)(properties.fixedPitch ? 1 : 0) + "\x00\x00\x00\x00" + "\x00\x00\x00\x00" + "\x00\x00\x00\x00" + "\x00\x00\x00\x00";
}

function createPostscriptName(name) {
  return name.replace(/[^\x21-\x7E]|[[\](){}<>/%]/g, "").slice(0, 63);
}

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

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

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

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

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

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

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

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

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

class Font {
  constructor(name, file, properties) {
    this.name = name;
    this.psName = null;
    this.mimetype = null;
    this.disableFontFace = false;
    this.loadedName = properties.loadedName;
    this.isType3Font = properties.isType3Font;
    this.missingFile = false;
    this.cssFontInfo = properties.cssFontInfo;
    this._charsCache = Object.create(null);
    this._glyphCache = Object.create(null);
    this.isSerifFont = !!(properties.flags & _fonts_utils.FontFlags.Serif);
    this.isSymbolicFont = !!(properties.flags & _fonts_utils.FontFlags.Symbolic);
    this.isMonospace = !!(properties.flags & _fonts_utils.FontFlags.FixedPitch);
    let type = properties.type;
    let subtype = properties.subtype;
    this.type = type;
    this.subtype = subtype;
    let fallbackName = "sans-serif";

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

    this.fallbackName = fallbackName;
    this.differences = properties.differences;
    this.widths = properties.widths;
    this.defaultWidth = properties.defaultWidth;
    this.composite = properties.composite;
    this.cMap = properties.cMap;
    this.capHeight = properties.capHeight / PDF_GLYPH_SPACE_UNITS;
    this.ascent = properties.ascent / PDF_GLYPH_SPACE_UNITS;
    this.descent = properties.descent / PDF_GLYPH_SPACE_UNITS;
    this.lineHeight = this.ascent - this.descent;
    this.fontMatrix = properties.fontMatrix;
    this.bbox = properties.bbox;
    this.defaultEncoding = properties.defaultEncoding;
    this.toUnicode = properties.toUnicode;
    this.toFontChar = [];

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

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

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

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

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

      this.fallbackToSystemFont(properties);
      return;
    }

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

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

    let data;

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

        case "Type1":
        case "CIDFontType0":
          this.mimetype = "font/opentype";
          const cff = subtype === "Type1C" || subtype === "CIDFontType0C" ? new _cff_font.CFFFont(file, properties) : new _type1_font.Type1Font(name, file, properties);
          adjustWidths(properties);
          data = this.convert(name, cff, properties);
          break;

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

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

          break;

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

    amendFallbackToUnicode(properties);
    this.data = data;
    this.fontType = (0, _fonts_utils.getFontType)(type, subtype, properties.isStandardFont);
    this.fontMatrix = properties.fontMatrix;
    this.widths = properties.widths;
    this.defaultWidth = properties.defaultWidth;
    this.toUnicode = properties.toUnicode;
    this.seacMap = properties.seacMap;
  }

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

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

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

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

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

    return data;
  }

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

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

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

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

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

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

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

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

      const isIdentityUnicode = this.toUnicode instanceof _to_unicode_map.IdentityToUnicodeMap;

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

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

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

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

        map[+charCode] = unicodeCharCode;
      });

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

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

      this.toFontChar = map;
    }

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

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

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

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

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

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

        tables[table.tag] = table;
      }

      return tables;
    }

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

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

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

    function readOpenTypeHeader(ttf) {
      return {
        version: ttf.getString(4),
        numTables: ttf.getUint16(),
        searchRange: ttf.getUint16(),
        entrySelector: ttf.getUint16(),
        rangeShift: ttf.getUint16()
      };
    }

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

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

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

      switch (majorVersion) {
        case 1:
          return header;

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

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

    function readTrueTypeCollectionData(ttc, fontName) {
      const {
        numFonts,
        offsetTable
      } = readTrueTypeCollectionHeader(ttc);
      const fontNameParts = fontName.split("+");
      let fallbackData;

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

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

        const nameTable = readNameTable(potentialTables.name);

        for (let j = 0, jj = nameTable.length; j < jj; j++) {
          for (let k = 0, kk = nameTable[j].length; k < kk; k++) {
            const nameEntry = nameTable[j][k] && nameTable[j][k].replace(/\s/g, "");

            if (!nameEntry) {
              continue;
            }

            if (nameEntry === fontName) {
              return {
                header: potentialHeader,
                tables: potentialTables
              };
            }

            if (fontNameParts.length < 2) {
              continue;
            }

            for (const part of fontNameParts) {
              if (nameEntry === part) {
                fallbackData = {
                  name: part,
                  header: potentialHeader,
                  tables: potentialTables
                };
              }
            }
          }
        }
      }

      if (fallbackData) {
        (0, _util.warn)(`TrueType Collection does not contain "${fontName}" font, ` + `falling back to "${fallbackData.name}" font instead.`);
        return {
          header: fallbackData.header,
          tables: fallbackData.tables
        };
      }

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

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

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

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

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

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

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

          if (i < numTables - 1) {
            const nextBytes = file.peekBytes(2),
                  nextPlatformId = int16(nextBytes[0], nextBytes[1]);

            if (nextPlatformId < platformId) {
              correctlySorted = false;
            }
          }

          if (correctlySorted) {
            canBreak = true;
          }
        }

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

        if (canBreak) {
          break;
        }
      }

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

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

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

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

          if (!index) {
            continue;
          }

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

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

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

        file.skip(2);

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

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

        let offsetsCount = 0,
            offsetIndex;

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

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

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

        const offsets = [];

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

        for (segIndex = 0; segIndex < segCount; segIndex++) {
          segment = segments[segIndex];
          start = segment.start;
          const end = segment.end;
          const 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) {
        const firstCode = file.getUint16();
        const entryCount = file.getUint16();

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

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

      for (let 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, headTable, numGlyphs, dupFirstEntry) {
      if (!header) {
        if (metrics) {
          metrics.data = null;
        }

        return;
      }

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

      if (caretOffset !== 0) {
        const macStyle = int16(headTable.data[44], headTable.data[45]);

        if (!(macStyle & 2)) {
          header.data[22] = 0;
          header.data[23] = 0;
        }
      }

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

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

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

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

        metrics.data = entries;
      }
    }

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

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

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

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

      let i,
          j = 10,
          flagsCount = 0;

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

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

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

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

        let xLength = 2;

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

        let yLength = 2;

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

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

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

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

      let glyphDataLength = j + coordinatesLength;

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

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

        if (glyf.length - glyphDataLength > 3) {
          glyphDataLength = glyphDataLength + 3 & ~3;
        }

        glyphProfile.length = glyphDataLength;
        return glyphProfile;
      }

      if (glyf.length - glyphDataLength > 3) {
        glyphDataLength = glyphDataLength + 3 & ~3;
        dest.set(glyf.subarray(0, glyphDataLength), destStart);
        glyphProfile.length = glyphDataLength;
        return glyphProfile;
      }

      dest.set(glyf, destStart);
      glyphProfile.length = glyf.length;
      return glyphProfile;
    }

    function sanitizeHead(head, numGlyphs, locaLength) {
      const data = head.data;
      const version = int32(data[0], data[1], data[2], data[3]);

      if (version >> 16 !== 1) {
        (0, _util.info)("Attempting to fix invalid version in head table: " + version);
        data[0] = 0;
        data[1] = 1;
        data[2] = 0;
        data[3] = 0;
      }

      const indexToLocFormat = int16(data[50], data[51]);

      if (indexToLocFormat < 0 || indexToLocFormat > 1) {
        (0, _util.info)("Attempting to fix invalid indexToLocFormat in head table: " + indexToLocFormat);
        const numGlyphsPlusOne = numGlyphs + 1;

        if (locaLength === numGlyphsPlusOne << 1) {
          data[50] = 0;
          data[51] = 0;
        } else if (locaLength === numGlyphsPlusOne << 2) {
          data[50] = 0;
          data[51] = 1;
        } else {
          throw new _util.FormatError("Could not fix indexToLocFormat: " + indexToLocFormat);
        }
      }
    }

    function sanitizeGlyphLocations(loca, glyf, numGlyphs, isGlyphLocationsLong, hintsValid, dupFirstEntry, maxSizeOfInstructions) {
      let 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;
        };
      }

      const numGlyphsOut = dupFirstEntry ? numGlyphs + 1 : numGlyphs;
      const locaDataSize = itemSize * (1 + numGlyphsOut);
      const locaData = new Uint8Array(locaDataSize);
      locaData.set(loca.data.subarray(0, locaDataSize));
      loca.data = locaData;
      const oldGlyfData = glyf.data;
      const oldGlyfDataLength = oldGlyfData.length;
      const newGlyfData = new Uint8Array(oldGlyfDataLength);
      let i, j;
      const locaEntries = [];

      for (i = 0, j = 0; i < numGlyphs + 1; i++, j += itemSize) {
        let offset = itemDecode(locaData, j);

        if (offset > oldGlyfDataLength) {
          offset = oldGlyfDataLength;
        }

        locaEntries.push({
          index: i,
          offset,
          endOffset: 0
        });
      }

      locaEntries.sort((a, b) => {
        return a.offset - b.offset;
      });

      for (i = 0; i < numGlyphs; i++) {
        locaEntries[i].endOffset = locaEntries[i + 1].offset;
      }

      locaEntries.sort((a, b) => {
        return a.index - b.index;
      });
      const missingGlyphs = Object.create(null);
      let writeOffset = 0;
      itemEncode(locaData, 0, writeOffset);

      for (i = 0, j = itemSize; i < numGlyphs; i++, j += itemSize) {
        const glyphProfile = sanitizeGlyph(oldGlyfData, locaEntries[i].offset, locaEntries[i].endOffset, newGlyfData, writeOffset, hintsValid);
        const newLength = glyphProfile.length;

        if (newLength === 0) {
          missingGlyphs[i] = true;
        }

        if (glyphProfile.sizeOfInstructions > maxSizeOfInstructions) {
          maxSizeOfInstructions = glyphProfile.sizeOfInstructions;
        }

        writeOffset += newLength;
        itemEncode(locaData, j, writeOffset);
      }

      if (writeOffset === 0) {
        const 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) {
        const 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) {
      const start = (font.start ? font.start : 0) + post.offset;
      font.pos = start;
      const length = post.length,
            end = start + length;
      const version = font.getInt32();
      font.skip(28);
      let glyphNames;
      let valid = true;
      let i;

      switch (version) {
        case 0x00010000:
          glyphNames = _fonts_utils.MacStandardGlyphOrdering;
          break;

        case 0x00020000:
          const numGlyphs = font.getUint16();

          if (numGlyphs !== maxpNumGlyphs) {
            valid = false;
            break;
          }

          const glyphNameIndexes = [];

          for (i = 0; i < numGlyphs; ++i) {
            const index = font.getUint16();

            if (index >= 32768) {
              valid = false;
              break;
            }

            glyphNameIndexes.push(index);
          }

          if (!valid) {
            break;
          }

          const customNames = [],
                strBuf = [];

          while (font.pos < end) {
            const 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) {
            const j = glyphNameIndexes[i];

            if (j < 258) {
              glyphNames.push(_fonts_utils.MacStandardGlyphOrdering[j]);
              continue;
            }

            glyphNames.push(customNames[j - 258]);
          }

          break;

        case 0x00030000:
          break;

        default:
          (0, _util.warn)("Unknown/unsupported post table version " + version);
          valid = false;

          if (propertiesObj.defaultEncoding) {
            glyphNames = propertiesObj.defaultEncoding;
          }

          break;
      }

      propertiesObj.glyphNames = glyphNames;
      return valid;
    }

    function readNameTable(nameTable) {
      const start = (font.start ? font.start : 0) + nameTable.offset;
      font.pos = start;
      const names = [[], []];
      const length = nameTable.length,
            end = start + length;
      const format = font.getUint16();
      const FORMAT_0_HEADER_LENGTH = 6;

      if (format !== 0 || length < FORMAT_0_HEADER_LENGTH) {
        return names;
      }

      const numRecords = font.getUint16();
      const stringsStart = font.getUint16();
      const records = [];
      const NAME_RECORD_LENGTH = 12;
      let i, ii;

      for (i = 0; i < numRecords && font.pos + NAME_RECORD_LENGTH <= end; i++) {
        const r = {
          platform: font.getUint16(),
          encoding: font.getUint16(),
          language: font.getUint16(),
          name: font.getUint16(),
          length: font.getUint16(),
          offset: font.getUint16()
        };

        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 = r