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/* 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.
 */
/* jshint globalstrict: false */
/* umdutils ignore */

var pdfjsVersion = '1.4.20';
var pdfjsBuild = 'b15f335';

var pdfjsFilePath =
    typeof document !== 'undefined' && document.currentScript ?
      document.currentScript.src : null;

var pdfjsLibs = {};

(function pdfjsWrapper() {

(function (root, factory) {
  {
    factory((root.pdfjsSharedGlobal = {}));
  }
}(this, function (exports) {

var globalScope = (typeof window !== 'undefined') ? window :
                    (typeof global !== 'undefined') ? global :
                    (typeof self !== 'undefined') ? self : this;

var isWorker = (typeof window === 'undefined');

// The global PDFJS object exposes the API
  // In production, it will be declared outside a global wrapper
  // In development, it will be declared here
  if (!globalScope.PDFJS) {
    globalScope.PDFJS = {};
  }

if (typeof pdfjsVersion !== 'undefined') {
    globalScope.PDFJS.version = pdfjsVersion;
  }
  if (typeof pdfjsVersion !== 'undefined') {
    globalScope.PDFJS.build = pdfjsBuild;
  }

globalScope.PDFJS.pdfBug = false;

exports.globalScope = globalScope;
  exports.isWorker = isWorker;
  exports.PDFJS = globalScope.PDFJS;
}));

(function (root, factory) {
  {
    factory((root.pdfjsDisplayDOMUtils = {}), root.pdfjsSharedGlobal);
  }
}(this, function (exports, sharedGlobal) {

var PDFJS = sharedGlobal.PDFJS;

/**
 * Optimised CSS custom property getter/setter.
 * @class
 */
var CustomStyle = (function CustomStyleClosure() {

// As noted on: http://www.zachstronaut.com/posts/2009/02/17/
  //              animate-css-transforms-firefox-webkit.html
  // in some versions of IE9 it is critical that ms appear in this list
  // before Moz
  var prefixes = ['ms', 'Moz', 'Webkit', 'O'];
  var _cache = {};

function CustomStyle() {}

CustomStyle.getProp = function get(propName, element) {
    // check cache only when no element is given
    if (arguments.length === 1 && typeof _cache[propName] === 'string') {
      return _cache[propName];
    }

element = element || document.documentElement;
    var style = element.style, prefixed, uPropName;

// test standard property first
    if (typeof style[propName] === 'string') {
      return (_cache[propName] = propName);
    }

// capitalize
    uPropName = propName.charAt(0).toUpperCase() + propName.slice(1);

// test vendor specific properties
    for (var i = 0, l = prefixes.length; i < l; i++) {
      prefixed = prefixes[i] + uPropName;
      if (typeof style[prefixed] === 'string') {
        return (_cache[propName] = prefixed);
      }
    }

//if all fails then set to undefined
    return (_cache[propName] = 'undefined');
  };

CustomStyle.setProp = function set(propName, element, str) {
    var prop = this.getProp(propName);
    if (prop !== 'undefined') {
      element.style[prop] = str;
    }
  };

return CustomStyle;
})();

PDFJS.CustomStyle = CustomStyle;

exports.CustomStyle = CustomStyle;
}));

(function (root, factory) {
  {
    factory((root.pdfjsSharedUtil = {}), root.pdfjsSharedGlobal);
  }
}(this, function (exports, sharedGlobal) {

var PDFJS = sharedGlobal.PDFJS;
var globalScope = sharedGlobal.globalScope;

var FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0];

var TextRenderingMode = {
  FILL: 0,
  STROKE: 1,
  FILL_STROKE: 2,
  INVISIBLE: 3,
  FILL_ADD_TO_PATH: 4,
  STROKE_ADD_TO_PATH: 5,
  FILL_STROKE_ADD_TO_PATH: 6,
  ADD_TO_PATH: 7,
  FILL_STROKE_MASK: 3,
  ADD_TO_PATH_FLAG: 4
};

var ImageKind = {
  GRAYSCALE_1BPP: 1,
  RGB_24BPP: 2,
  RGBA_32BPP: 3
};

var AnnotationType = {
  TEXT: 1,
  LINK: 2,
  FREETEXT: 3,
  LINE: 4,
  SQUARE: 5,
  CIRCLE: 6,
  POLYGON: 7,
  POLYLINE: 8,
  HIGHLIGHT: 9,
  UNDERLINE: 10,
  SQUIGGLY: 11,
  STRIKEOUT: 12,
  STAMP: 13,
  CARET: 14,
  INK: 15,
  POPUP: 16,
  FILEATTACHMENT: 17,
  SOUND: 18,
  MOVIE: 19,
  WIDGET: 20,
  SCREEN: 21,
  PRINTERMARK: 22,
  TRAPNET: 23,
  WATERMARK: 24,
  THREED: 25,
  REDACT: 26
};

var AnnotationFlag = {
  INVISIBLE: 0x01,
  HIDDEN: 0x02,
  PRINT: 0x04,
  NOZOOM: 0x08,
  NOROTATE: 0x10,
  NOVIEW: 0x20,
  READONLY: 0x40,
  LOCKED: 0x80,
  TOGGLENOVIEW: 0x100,
  LOCKEDCONTENTS: 0x200
};

var AnnotationBorderStyleType = {
  SOLID: 1,
  DASHED: 2,
  BEVELED: 3,
  INSET: 4,
  UNDERLINE: 5
};

var StreamType = {
  UNKNOWN: 0,
  FLATE: 1,
  LZW: 2,
  DCT: 3,
  JPX: 4,
  JBIG: 5,
  A85: 6,
  AHX: 7,
  CCF: 8,
  RL: 9
};

var FontType = {
  UNKNOWN: 0,
  TYPE1: 1,
  TYPE1C: 2,
  CIDFONTTYPE0: 3,
  CIDFONTTYPE0C: 4,
  TRUETYPE: 5,
  CIDFONTTYPE2: 6,
  TYPE3: 7,
  OPENTYPE: 8,
  TYPE0: 9,
  MMTYPE1: 10
};

PDFJS.VERBOSITY_LEVELS = {
  errors: 0,
  warnings: 1,
  infos: 5
};

// All the possible operations for an operator list.
var OPS = PDFJS.OPS = {
  // Intentionally start from 1 so it is easy to spot bad operators that will be
  // 0's.
  dependency: 1,
  setLineWidth: 2,
  setLineCap: 3,
  setLineJoin: 4,
  setMiterLimit: 5,
  setDash: 6,
  setRenderingIntent: 7,
  setFlatness: 8,
  setGState: 9,
  save: 10,
  restore: 11,
  transform: 12,
  moveTo: 13,
  lineTo: 14,
  curveTo: 15,
  curveTo2: 16,
  curveTo3: 17,
  closePath: 18,
  rectangle: 19,
  stroke: 20,
  closeStroke: 21,
  fill: 22,
  eoFill: 23,
  fillStroke: 24,
  eoFillStroke: 25,
  closeFillStroke: 26,
  closeEOFillStroke: 27,
  endPath: 28,
  clip: 29,
  eoClip: 30,
  beginText: 31,
  endText: 32,
  setCharSpacing: 33,
  setWordSpacing: 34,
  setHScale: 35,
  setLeading: 36,
  setFont: 37,
  setTextRenderingMode: 38,
  setTextRise: 39,
  moveText: 40,
  setLeadingMoveText: 41,
  setTextMatrix: 42,
  nextLine: 43,
  showText: 44,
  showSpacedText: 45,
  nextLineShowText: 46,
  nextLineSetSpacingShowText: 47,
  setCharWidth: 48,
  setCharWidthAndBounds: 49,
  setStrokeColorSpace: 50,
  setFillColorSpace: 51,
  setStrokeColor: 52,
  setStrokeColorN: 53,
  setFillColor: 54,
  setFillColorN: 55,
  setStrokeGray: 56,
  setFillGray: 57,
  setStrokeRGBColor: 58,
  setFillRGBColor: 59,
  setStrokeCMYKColor: 60,
  setFillCMYKColor: 61,
  shadingFill: 62,
  beginInlineImage: 63,
  beginImageData: 64,
  endInlineImage: 65,
  paintXObject: 66,
  markPoint: 67,
  markPointProps: 68,
  beginMarkedContent: 69,
  beginMarkedContentProps: 70,
  endMarkedContent: 71,
  beginCompat: 72,
  endCompat: 73,
  paintFormXObjectBegin: 74,
  paintFormXObjectEnd: 75,
  beginGroup: 76,
  endGroup: 77,
  beginAnnotations: 78,
  endAnnotations: 79,
  beginAnnotation: 80,
  endAnnotation: 81,
  paintJpegXObject: 82,
  paintImageMaskXObject: 83,
  paintImageMaskXObjectGroup: 84,
  paintImageXObject: 85,
  paintInlineImageXObject: 86,
  paintInlineImageXObjectGroup: 87,
  paintImageXObjectRepeat: 88,
  paintImageMaskXObjectRepeat: 89,
  paintSolidColorImageMask: 90,
  constructPath: 91
};

// A notice for devs. These are good for things that are helpful to devs, such
// as warning that Workers were disabled, which is important to devs but not
// end users.
function info(msg) {
  if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.infos) {
    console.log('Info: ' + msg);
  }
}

// Non-fatal warnings.
function warn(msg) {
  if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.warnings) {
    console.log('Warning: ' + msg);
  }
}

// Deprecated API function -- treated as warnings.
function deprecated(details) {
  warn('Deprecated API usage: ' + details);
}

// Fatal errors that should trigger the fallback UI and halt execution by
// throwing an exception.
function error(msg) {
  if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.errors) {
    console.log('Error: ' + msg);
    console.log(backtrace());
  }
  throw new Error(msg);
}

function backtrace() {
  try {
    throw new Error();
  } catch (e) {
    return e.stack ? e.stack.split('\n').slice(2).join('\n') : '';
  }
}

function assert(cond, msg) {
  if (!cond) {
    error(msg);
  }
}

var UNSUPPORTED_FEATURES = PDFJS.UNSUPPORTED_FEATURES = {
  unknown: 'unknown',
  forms: 'forms',
  javaScript: 'javaScript',
  smask: 'smask',
  shadingPattern: 'shadingPattern',
  font: 'font'
};

// Combines two URLs. The baseUrl shall be absolute URL. If the url is an
// absolute URL, it will be returned as is.
function combineUrl(baseUrl, url) {
  if (!url) {
    return baseUrl;
  }
  return new URL(url, baseUrl).href;
}

// Validates if URL is safe and allowed, e.g. to avoid XSS.
function isValidUrl(url, allowRelative) {
  if (!url) {
    return false;
  }
  // RFC 3986 (http://tools.ietf.org/html/rfc3986#section-3.1)
  // scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
  var protocol = /^[a-z][a-z0-9+\-.]*(?=:)/i.exec(url);
  if (!protocol) {
    return allowRelative;
  }
  protocol = protocol[0].toLowerCase();
  switch (protocol) {
    case 'http':
    case 'https':
    case 'ftp':
    case 'mailto':
    case 'tel':
      return true;
    default:
      return false;
  }
}
PDFJS.isValidUrl = isValidUrl;

/**
 * Adds various attributes (href, title, target, rel) to hyperlinks.
 * @param {HTMLLinkElement} link - The link element.
 * @param {Object} params - An object with the properties:
 * @param {string} params.url - An absolute URL.
 */
function addLinkAttributes(link, params) {
  var url = params && params.url;
  link.href = link.title = (url ? removeNullCharacters(url) : '');

if (url) {
    if (isExternalLinkTargetSet()) {
      link.target = LinkTargetStringMap[PDFJS.externalLinkTarget];
    }
    // Strip referrer from the URL.
    link.rel = PDFJS.externalLinkRel;
  }
}
PDFJS.addLinkAttributes = addLinkAttributes;

function shadow(obj, prop, value) {
  Object.defineProperty(obj, prop, { value: value,
                                     enumerable: true,
                                     configurable: true,
                                     writable: false });
  return value;
}
PDFJS.shadow = shadow;

var LinkTarget = PDFJS.LinkTarget = {
  NONE: 0, // Default value.
  SELF: 1,
  BLANK: 2,
  PARENT: 3,
  TOP: 4,
};
var LinkTargetStringMap = [
  '',
  '_self',
  '_blank',
  '_parent',
  '_top'
];

var PasswordResponses = PDFJS.PasswordResponses = {
  NEED_PASSWORD: 1,
  INCORRECT_PASSWORD: 2
};

var PasswordException = (function PasswordExceptionClosure() {
  function PasswordException(msg, code) {
    this.name = 'PasswordException';
    this.message = msg;
    this.code = code;
  }

PasswordException.prototype = new Error();
  PasswordException.constructor = PasswordException;

return PasswordException;
})();
PDFJS.PasswordException = PasswordException;

var UnknownErrorException = (function UnknownErrorExceptionClosure() {
  function UnknownErrorException(msg, details) {
    this.name = 'UnknownErrorException';
    this.message = msg;
    this.details = details;
  }

UnknownErrorException.prototype = new Error();
  UnknownErrorException.constructor = UnknownErrorException;

return UnknownErrorException;
})();
PDFJS.UnknownErrorException = UnknownErrorException;

var InvalidPDFException = (function InvalidPDFExceptionClosure() {
  function InvalidPDFException(msg) {
    this.name = 'InvalidPDFException';
    this.message = msg;
  }

InvalidPDFException.prototype = new Error();
  InvalidPDFException.constructor = InvalidPDFException;

return InvalidPDFException;
})();
PDFJS.InvalidPDFException = InvalidPDFException;

var MissingPDFException = (function MissingPDFExceptionClosure() {
  function MissingPDFException(msg) {
    this.name = 'MissingPDFException';
    this.message = msg;
  }

MissingPDFException.prototype = new Error();
  MissingPDFException.constructor = MissingPDFException;

return MissingPDFException;
})();
PDFJS.MissingPDFException = MissingPDFException;

var UnexpectedResponseException =
    (function UnexpectedResponseExceptionClosure() {
  function UnexpectedResponseException(msg, status) {
    this.name = 'UnexpectedResponseException';
    this.message = msg;
    this.status = status;
  }

UnexpectedResponseException.prototype = new Error();
  UnexpectedResponseException.constructor = UnexpectedResponseException;

return UnexpectedResponseException;
})();
PDFJS.UnexpectedResponseException = UnexpectedResponseException;

var NotImplementedException = (function NotImplementedExceptionClosure() {
  function NotImplementedException(msg) {
    this.message = msg;
  }

NotImplementedException.prototype = new Error();
  NotImplementedException.prototype.name = 'NotImplementedException';
  NotImplementedException.constructor = NotImplementedException;

return NotImplementedException;
})();

var MissingDataException = (function MissingDataExceptionClosure() {
  function MissingDataException(begin, end) {
    this.begin = begin;
    this.end = end;
    this.message = 'Missing data [' + begin + ', ' + end + ')';
  }

MissingDataException.prototype = new Error();
  MissingDataException.prototype.name = 'MissingDataException';
  MissingDataException.constructor = MissingDataException;

return MissingDataException;
})();

var XRefParseException = (function XRefParseExceptionClosure() {
  function XRefParseException(msg) {
    this.message = msg;
  }

XRefParseException.prototype = new Error();
  XRefParseException.prototype.name = 'XRefParseException';
  XRefParseException.constructor = XRefParseException;

return XRefParseException;
})();

var NullCharactersRegExp = /\x00/g;

function removeNullCharacters(str) {
  if (typeof str !== 'string') {
    warn('The argument for removeNullCharacters must be a string.');
    return str;
  }
  return str.replace(NullCharactersRegExp, '');
}
PDFJS.removeNullCharacters = removeNullCharacters;

function stringToBytes(str) {
  assert(typeof str === 'string', 'Invalid argument for stringToBytes');
  var length = str.length;
  var bytes = new Uint8Array(length);
  for (var i = 0; i < length; ++i) {
    bytes[i] = str.charCodeAt(i) & 0xFF;
  }
  return bytes;
}

function string32(value) {
  return String.fromCharCode((value >> 24) & 0xff, (value >> 16) & 0xff,
                             (value >> 8) & 0xff, value & 0xff);
}

function log2(x) {
  var n = 1, i = 0;
  while (x > n) {
    n <<= 1;
    i++;
  }
  return i;
}

function readInt8(data, start) {
  return (data[start] << 24) >> 24;
}

function readUint16(data, offset) {
  return (data[offset] << 8) | data[offset + 1];
}

function readUint32(data, offset) {
  return ((data[offset] << 24) | (data[offset + 1] << 16) |
         (data[offset + 2] << 8) | data[offset + 3]) >>> 0;
}

// Lazy test the endianness of the platform
// NOTE: This will be 'true' for simulated TypedArrays
function isLittleEndian() {
  var buffer8 = new Uint8Array(2);
  buffer8[0] = 1;
  var buffer16 = new Uint16Array(buffer8.buffer);
  return (buffer16[0] === 1);
}

Object.defineProperty(PDFJS, 'isLittleEndian', {
  configurable: true,
  get: function PDFJS_isLittleEndian() {
    return shadow(PDFJS, 'isLittleEndian', isLittleEndian());
  }
});

// Lazy test if the userAgent support CanvasTypedArrays
function hasCanvasTypedArrays() {
  var canvas = document.createElement('canvas');
  canvas.width = canvas.height = 1;
  var ctx = canvas.getContext('2d');
  var imageData = ctx.createImageData(1, 1);
  return (typeof imageData.data.buffer !== 'undefined');
}

Object.defineProperty(PDFJS, 'hasCanvasTypedArrays', {
  configurable: true,
  get: function PDFJS_hasCanvasTypedArrays() {
    return shadow(PDFJS, 'hasCanvasTypedArrays', hasCanvasTypedArrays());
  }
});

var Uint32ArrayView = (function Uint32ArrayViewClosure() {

function Uint32ArrayView(buffer, length) {
    this.buffer = buffer;
    this.byteLength = buffer.length;
    this.length = length === undefined ? (this.byteLength >> 2) : length;
    ensureUint32ArrayViewProps(this.length);
  }
  Uint32ArrayView.prototype = Object.create(null);

function ensureUint32ArrayViewProps(length) {
    while (uint32ArrayViewSetters < length) {
      Object.defineProperty(Uint32ArrayView.prototype,
        uint32ArrayViewSetters,
        createUint32ArrayProp(uint32ArrayViewSetters));
      uint32ArrayViewSetters++;
    }
  }

return Uint32ArrayView;
})();

exports.Uint32ArrayView = Uint32ArrayView;

var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];

var Util = PDFJS.Util = (function UtilClosure() {
  function Util() {}

var rgbBuf = ['rgb(', 0, ',', 0, ',', 0, ')'];

// makeCssRgb() can be called thousands of times. Using |rgbBuf| avoids
  // creating many intermediate strings.
  Util.makeCssRgb = function Util_makeCssRgb(r, g, b) {
    rgbBuf[1] = r;
    rgbBuf[3] = g;
    rgbBuf[5] = b;
    return rgbBuf.join('');
  };

// Concatenates two transformation matrices together and returns the result.
  Util.transform = function Util_transform(m1, m2) {
    return [
      m1[0] * m2[0] + m1[2] * m2[1],
      m1[1] * m2[0] + m1[3] * m2[1],
      m1[0] * m2[2] + m1[2] * m2[3],
      m1[1] * m2[2] + m1[3] * m2[3],
      m1[0] * m2[4] + m1[2] * m2[5] + m1[4],
      m1[1] * m2[4] + m1[3] * m2[5] + m1[5]
    ];
  };

// For 2d affine transforms
  Util.applyTransform = function Util_applyTransform(p, m) {
    var xt = p[0] * m[0] + p[1] * m[2] + m[4];
    var yt = p[0] * m[1] + p[1] * m[3] + m[5];
    return [xt, yt];
  };

Util.applyInverseTransform = function Util_applyInverseTransform(p, m) {
    var d = m[0] * m[3] - m[1] * m[2];
    var xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;
    var yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;
    return [xt, yt];
  };

// Applies the transform to the rectangle and finds the minimum axially
  // aligned bounding box.
  Util.getAxialAlignedBoundingBox =
    function Util_getAxialAlignedBoundingBox(r, m) {

var p1 = Util.applyTransform(r, m);
    var p2 = Util.applyTransform(r.slice(2, 4), m);
    var p3 = Util.applyTransform([r[0], r[3]], m);
    var p4 = Util.applyTransform([r[2], r[1]], m);
    return [
      Math.min(p1[0], p2[0], p3[0], p4[0]),
      Math.min(p1[1], p2[1], p3[1], p4[1]),
      Math.max(p1[0], p2[0], p3[0], p4[0]),
      Math.max(p1[1], p2[1], p3[1], p4[1])
    ];
  };

Util.inverseTransform = function Util_inverseTransform(m) {
    var d = m[0] * m[3] - m[1] * m[2];
    return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d,
      (m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d];
  };

// Apply a generic 3d matrix M on a 3-vector v:
  //   | a b c |   | X |
  //   | d e f | x | Y |
  //   | g h i |   | Z |
  // M is assumed to be serialized as [a,b,c,d,e,f,g,h,i],
  // with v as [X,Y,Z]
  Util.apply3dTransform = function Util_apply3dTransform(m, v) {
    return [
      m[0] * v[0] + m[1] * v[1] + m[2] * v[2],
      m[3] * v[0] + m[4] * v[1] + m[5] * v[2],
      m[6] * v[0] + m[7] * v[1] + m[8] * v[2]
    ];
  };

// This calculation uses Singular Value Decomposition.
  // The SVD can be represented with formula A = USV. We are interested in the
  // matrix S here because it represents the scale values.
  Util.singularValueDecompose2dScale =
    function Util_singularValueDecompose2dScale(m) {

var transpose = [m[0], m[2], m[1], m[3]];

// Multiply matrix m with its transpose.
    var a = m[0] * transpose[0] + m[1] * transpose[2];
    var b = m[0] * transpose[1] + m[1] * transpose[3];
    var c = m[2] * transpose[0] + m[3] * transpose[2];
    var d = m[2] * transpose[1] + m[3] * transpose[3];

// Solve the second degree polynomial to get roots.
    var first = (a + d) / 2;
    var second = Math.sqrt((a + d) * (a + d) - 4 * (a * d - c * b)) / 2;
    var sx = first + second || 1;
    var sy = first - second || 1;

// Scale values are the square roots of the eigenvalues.
    return [Math.sqrt(sx), Math.sqrt(sy)];
  };

// Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2)
  // For coordinate systems whose origin lies in the bottom-left, this
  // means normalization to (BL,TR) ordering. For systems with origin in the
  // top-left, this means (TL,BR) ordering.
  Util.normalizeRect = function Util_normalizeRect(rect) {
    var r = rect.slice(0); // clone rect
    if (rect[0] > rect[2]) {
      r[0] = rect[2];
      r[2] = rect[0];
    }
    if (rect[1] > rect[3]) {
      r[1] = rect[3];
      r[3] = rect[1];
    }
    return r;
  };

// Returns a rectangle [x1, y1, x2, y2] corresponding to the
  // intersection of rect1 and rect2. If no intersection, returns 'false'
  // The rectangle coordinates of rect1, rect2 should be [x1, y1, x2, y2]
  Util.intersect = function Util_intersect(rect1, rect2) {
    function compare(a, b) {
      return a - b;
    }

// Order points along the axes
    var orderedX = [rect1[0], rect1[2], rect2[0], rect2[2]].sort(compare),
        orderedY = [rect1[1], rect1[3], rect2[1], rect2[3]].sort(compare),
        result = [];

rect1 = Util.normalizeRect(rect1);
    rect2 = Util.normalizeRect(rect2);

// X: first and second points belong to different rectangles?
    if ((orderedX[0] === rect1[0] && orderedX[1] === rect2[0]) ||
        (orderedX[0] === rect2[0] && orderedX[1] === rect1[0])) {
      // Intersection must be between second and third points
      result[0] = orderedX[1];
      result[2] = orderedX[2];
    } else {
      return false;
    }

// Y: first and second points belong to different rectangles?
    if ((orderedY[0] === rect1[1] && orderedY[1] === rect2[1]) ||
        (orderedY[0] === rect2[1] && orderedY[1] === rect1[1])) {
      // Intersection must be between second and third points
      result[1] = orderedY[1];
      result[3] = orderedY[2];
    } else {
      return false;
    }

return result;
  };

Util.sign = function Util_sign(num) {
    return num < 0 ? -1 : 1;
  };

var romanStr = romanBuf.join('');
    return (lowerCase ? romanStr.toLowerCase() : romanStr);
  };

Util.appendToArray = function Util_appendToArray(arr1, arr2) {
    Array.prototype.push.apply(arr1, arr2);
  };

Util.prependToArray = function Util_prependToArray(arr1, arr2) {
    Array.prototype.unshift.apply(arr1, arr2);
  };

Util.extendObj = function extendObj(obj1, obj2) {
    for (var key in obj2) {
      obj1[key] = obj2[key];
    }
  };

Util.getInheritableProperty = function Util_getInheritableProperty(dict,
                                                                     name) {
    while (dict && !dict.has(name)) {
      dict = dict.get('Parent');
    }
    if (!dict) {
      return null;
    }
    return dict.get(name);
  };

Util.inherit = function Util_inherit(sub, base, prototype) {
    sub.prototype = Object.create(base.prototype);
    sub.prototype.constructor = sub;
    for (var prop in prototype) {
      sub.prototype[prop] = prototype[prop];
    }
  };

Util.loadScript = function Util_loadScript(src, callback) {
    var script = document.createElement('script');
    var loaded = false;
    script.setAttribute('src', src);
    if (callback) {
      script.onload = function() {
        if (!loaded) {
          callback();
        }
        loaded = true;
      };
    }
    document.getElementsByTagName('head')[0].appendChild(script);
  };

return Util;
})();

/**
 * PDF page viewport created based on scale, rotation and offset.
 * @class
 * @alias PDFJS.PageViewport
 */
var PageViewport = PDFJS.PageViewport = (function PageViewportClosure() {
  /**
   * @constructor
   * @private
   * @param viewBox {Array} xMin, yMin, xMax and yMax coordinates.
   * @param scale {number} scale of the viewport.
   * @param rotation {number} rotations of the viewport in degrees.
   * @param offsetX {number} offset X
   * @param offsetY {number} offset Y
   * @param dontFlip {boolean} if true, axis Y will not be flipped.
   */
  function PageViewport(viewBox, scale, rotation, offsetX, offsetY, dontFlip) {
    this.viewBox = viewBox;
    this.scale = scale;
    this.rotation = rotation;
    this.offsetX = offsetX;
    this.offsetY = offsetY;

// creating transform to convert pdf coordinate system to the normal
    // canvas like coordinates taking in account scale and rotation
    var centerX = (viewBox[2] + viewBox[0]) / 2;
    var centerY = (viewBox[3] + viewBox[1]) / 2;
    var rotateA, rotateB, rotateC, rotateD;
    rotation = rotation % 360;
    rotation = rotation < 0 ? rotation + 360 : rotation;
    switch (rotation) {
      case 180:
        rotateA = -1; rotateB = 0; rotateC = 0; rotateD = 1;
        break;
      case 90:
        rotateA = 0; rotateB = 1; rotateC = 1; rotateD = 0;
        break;
      case 270:
        rotateA = 0; rotateB = -1; rotateC = -1; rotateD = 0;
        break;
      //case 0:
      default:
        rotateA = 1; rotateB = 0; rotateC = 0; rotateD = -1;
        break;
    }

if (dontFlip) {
      rotateC = -rotateC; rotateD = -rotateD;
    }

var offsetCanvasX, offsetCanvasY;
    var width, height;
    if (rotateA === 0) {
      offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX;
      offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY;
      width = Math.abs(viewBox[3] - viewBox[1]) * scale;
      height = Math.abs(viewBox[2] - viewBox[0]) * scale;
    } else {
      offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX;
      offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY;
      width = Math.abs(viewBox[2] - viewBox[0]) * scale;
      height = Math.abs(viewBox[3] - viewBox[1]) * scale;
    }
    // creating transform for the following operations:
    // translate(-centerX, -centerY), rotate and flip vertically,
    // scale, and translate(offsetCanvasX, offsetCanvasY)
    this.transform = [
      rotateA * scale,
      rotateB * scale,
      rotateC * scale,
      rotateD * scale,
      offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY,
      offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY
    ];

this.width = width;
    this.height = height;
    this.fontScale = scale;
  }
  PageViewport.prototype = /** @lends PDFJS.PageViewport.prototype */ {
    /**
     * Clones viewport with additional properties.
     * @param args {Object} (optional) If specified, may contain the 'scale' or
     * 'rotation' properties to override the corresponding properties in
     * the cloned viewport.
     * @returns {PDFJS.PageViewport} Cloned viewport.
     */
    clone: function PageViewPort_clone(args) {
      args = args || {};
      var scale = 'scale' in args ? args.scale : this.scale;
      var rotation = 'rotation' in args ? args.rotation : this.rotation;
      return new PageViewport(this.viewBox.slice(), scale, rotation,
                              this.offsetX, this.offsetY, args.dontFlip);
    },
    /**
     * Converts PDF point to the viewport coordinates. For examples, useful for
     * converting PDF location into canvas pixel coordinates.
     * @param x {number} X coordinate.
     * @param y {number} Y coordinate.
     * @returns {Object} Object that contains 'x' and 'y' properties of the
     * point in the viewport coordinate space.
     * @see {@link convertToPdfPoint}
     * @see {@link convertToViewportRectangle}
     */
    convertToViewportPoint: function PageViewport_convertToViewportPoint(x, y) {
      return Util.applyTransform([x, y], this.transform);
    },
    /**
     * Converts PDF rectangle to the viewport coordinates.
     * @param rect {Array} xMin, yMin, xMax and yMax coordinates.
     * @returns {Array} Contains corresponding coordinates of the rectangle
     * in the viewport coordinate space.
     * @see {@link convertToViewportPoint}
     */
    convertToViewportRectangle:
      function PageViewport_convertToViewportRectangle(rect) {
      var tl = Util.applyTransform([rect[0], rect[1]], this.transform);
      var br = Util.applyTransform([rect[2], rect[3]], this.transform);
      return [tl[0], tl[1], br[0], br[1]];
    },
    /**
     * Converts viewport coordinates to the PDF location. For examples, useful
     * for converting canvas pixel location into PDF one.
     * @param x {number} X coordinate.
     * @param y {number} Y coordinate.
     * @returns {Object} Object that contains 'x' and 'y' properties of the
     * point in the PDF coordinate space.
     * @see {@link convertToViewportPoint}
     */
    convertToPdfPoint: function PageViewport_convertToPdfPoint(x, y) {
      return Util.applyInverseTransform([x, y], this.transform);
    }
  };
  return PageViewport;
})();

var PDFStringTranslateTable = [
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014,
  0x2013, 0x192, 0x2044, 0x2039, 0x203A, 0x2212, 0x2030, 0x201E, 0x201C,
  0x201D, 0x2018, 0x2019, 0x201A, 0x2122, 0xFB01, 0xFB02, 0x141, 0x152, 0x160,
  0x178, 0x17D, 0x131, 0x142, 0x153, 0x161, 0x17E, 0, 0x20AC
];

function stringToUTF8String(str) {
  return decodeURIComponent(escape(str));
}

function utf8StringToString(str) {
  return unescape(encodeURIComponent(str));
}

function isEmptyObj(obj) {
  for (var key in obj) {
    return false;
  }
  return true;
}

function isBool(v) {
  return typeof v === 'boolean';
}

function isInt(v) {
  return typeof v === 'number' && ((v | 0) === v);
}

function isNum(v) {
  return typeof v === 'number';
}

function isString(v) {
  return typeof v === 'string';
}

function isArray(v) {
  return v instanceof Array;
}

function isArrayBuffer(v) {
  return typeof v === 'object' && v !== null && v.byteLength !== undefined;
}

/**
 * Promise Capability object.
 *
 * @typedef {Object} PromiseCapability
 * @property {Promise} promise - A promise object.
 * @property {function} resolve - Fullfills the promise.
 * @property {function} reject - Rejects the promise.
 */

/**
 * Creates a promise capability object.
 * @alias PDFJS.createPromiseCapability
 *
 * @return {PromiseCapability} A capability object contains:
 * - a Promise, resolve and reject methods.
 */
function createPromiseCapability() {
  var capability = {};
  capability.promise = new Promise(function (resolve, reject) {
    capability.resolve = resolve;
    capability.reject = reject;
  });
  return capability;
}

PDFJS.createPromiseCapability = createPromiseCapability;

/**
 * Polyfill for Promises:
 * The following promise implementation tries to generally implement the
 * Promise/A+ spec. Some notable differences from other promise libaries are:
 * - There currently isn't a seperate deferred and promise object.
 * - Unhandled rejections eventually show an error if they aren't handled.
 *
 * Based off of the work in:
 * https://bugzilla.mozilla.org/show_bug.cgi?id=810490
 */
(function PromiseClosure() {
  if (globalScope.Promise) {
    // Promises existing in the DOM/Worker, checking presence of all/resolve
    if (typeof globalScope.Promise.all !== 'function') {
      globalScope.Promise.all = function (iterable) {
        var count = 0, results = [], resolve, reject;
        var promise = new globalScope.Promise(function (resolve_, reject_) {
          resolve = resolve_;
          reject = reject_;
        });
        iterable.forEach(function (p, i) {
          count++;
          p.then(function (result) {
            results[i] = result;
            count--;
            if (count === 0) {
              resolve(results);
            }
          }, reject);
        });
        if (count === 0) {
          resolve(results);
        }
        return promise;
      };
    }
    if (typeof globalScope.Promise.resolve !== 'function') {
      globalScope.Promise.resolve = function (value) {
        return new globalScope.Promise(function (resolve) { resolve(value); });
      };
    }
    if (typeof globalScope.Promise.reject !== 'function') {
      globalScope.Promise.reject = function (reason) {
        return new globalScope.Promise(function (resolve, reject) {
          reject(reason);
        });
      };
    }
    if (typeof globalScope.Promise.prototype.catch !== 'function') {
      globalScope.Promise.prototype.catch = function (onReject) {
        return globalScope.Promise.prototype.then(undefined, onReject);
      };
    }
    return;
  }
  var STATUS_PENDING = 0;
  var STATUS_RESOLVED = 1;
  var STATUS_REJECTED = 2;

// In an attempt to avoid silent exceptions, unhandled rejections are
  // tracked and if they aren't handled in a certain amount of time an
  // error is logged.
  var REJECTION_TIMEOUT = 500;

var HandlerManager = {
    handlers: [],
    running: false,
    unhandledRejections: [],
    pendingRejectionCheck: false,

scheduleHandlers: function scheduleHandlers(promise) {
      if (promise._status === STATUS_PENDING) {
        return;
      }

this.handlers = this.handlers.concat(promise._handlers);
      promise._handlers = [];

if (this.running) {
        return;
      }
      this.running = true;

setTimeout(this.runHandlers.bind(this), 0);
    },

runHandlers: function runHandlers() {
      var RUN_TIMEOUT = 1; // ms
      var timeoutAt = Date.now() + RUN_TIMEOUT;
      while (this.handlers.length > 0) {
        var handler = this.handlers.shift();

var nextStatus = handler.thisPromise._status;
        var nextValue = handler.thisPromise._value;

try {
          if (nextStatus === STATUS_RESOLVED) {
            if (typeof handler.onResolve === 'function') {
              nextValue = handler.onResolve(nextValue);
            }
          } else if (typeof handler.onReject === 'function') {
              nextValue = handler.onReject(nextValue);
              nextStatus = STATUS_RESOLVED;

if (handler.thisPromise._unhandledRejection) {
                this.removeUnhandeledRejection(handler.thisPromise);
              }
          }
        } catch (ex) {
          nextStatus = STATUS_REJECTED;
          nextValue = ex;
        }

handler.nextPromise._updateStatus(nextStatus, nextValue);
        if (Date.now() >= timeoutAt) {
          break;
        }
      }

if (this.handlers.length > 0) {
        setTimeout(this.runHandlers.bind(this), 0);
        return;
      }

this.running = false;
    },

addUnhandledRejection: function addUnhandledRejection(promise) {
      this.unhandledRejections.push({
        promise: promise,
        time: Date.now()
      });
      this.scheduleRejectionCheck();
    },

removeUnhandeledRejection: function removeUnhandeledRejection(promise) {
      promise._unhandledRejection = false;
      for (var i = 0; i < this.unhandledRejections.length; i++) {
        if (this.unhandledRejections[i].promise === promise) {
          this.unhandledRejections.splice(i);
          i--;
        }
      }
    },

scheduleRejectionCheck: function scheduleRejectionCheck() {
      if (this.pendingRejectionCheck) {
        return;
      }
      this.pendingRejectionCheck = true;
      setTimeout(function rejectionCheck() {
        this.pendingRejectionCheck = false;
        var now = Date.now();
        for (var i = 0; i < this.unhandledRejections.length; i++) {
          if (now - this.unhandledRejections[i].time > REJECTION_TIMEOUT) {
            var unhandled = this.unhandledRejections[i].promise._value;
            var msg = 'Unhandled rejection: ' + unhandled;
            if (unhandled.stack) {
              msg += '\n' + unhandled.stack;
            }
            warn(msg);
            this.unhandledRejections.splice(i);
            i--;
          }
        }
        if (this.unhandledRejections.length) {
          this.scheduleRejectionCheck();
        }
      }.bind(this), REJECTION_TIMEOUT);
    }
  };

/**
   * Checks if the value is likely a promise (has a 'then' function).
   * @return {boolean} true if value is thenable
   */
  Promise.isPromise = function Promise_isPromise(value) {
    return value && typeof value.then === 'function';
  };

/**
   * Creates resolved promise
   * @param value resolve value
   * @returns {Promise}
   */
  Promise.resolve = function Promise_resolve(value) {
    return new Promise(function (resolve) { resolve(value); });
  };

/**
   * Creates rejected promise
   * @param reason rejection value
   * @returns {Promise}
   */
  Promise.reject = function Promise_reject(reason) {
    return new Promise(function (resolve, reject) { reject(reason); });
  };

Promise.prototype = {
    _status: null,
    _value: null,
    _handlers: null,
    _unhandledRejection: null,

_updateStatus: function Promise__updateStatus(status, value) {
      if (this._status === STATUS_RESOLVED ||
          this._status === STATUS_REJECTED) {
        return;
      }

if (status === STATUS_RESOLVED &&
          Promise.isPromise(value)) {
        value.then(this._updateStatus.bind(this, STATUS_RESOLVED),
                   this._updateStatus.bind(this, STATUS_REJECTED));
        return;
      }

this._status = status;
      this._value = value;

if (status === STATUS_REJECTED && this._handlers.length === 0) {
        this._unhandledRejection = true;
        HandlerManager.addUnhandledRejection(this);
      }

HandlerManager.scheduleHandlers(this);
    },

_resolve: function Promise_resolve(value) {
      this._updateStatus(STATUS_RESOLVED, value);
    },

_reject: function Promise_reject(reason) {
      this._updateStatus(STATUS_REJECTED, reason);
    },

then: function Promise_then(onResolve, onReject) {
      var nextPromise = new Promise(function (resolve, reject) {
        this.resolve = resolve;
        this.reject = reject;
      });
      this._handlers.push({
        thisPromise: this,
        onResolve: onResolve,
        onReject: onReject,
        nextPromise: nextPromise
      });
      HandlerManager.scheduleHandlers(this);
      return nextPromise;
    },

catch: function Promise_catch(onReject) {
      return this.then(undefined, onReject);
    }
  };

globalScope.Promise = Promise;
})();

PDFJS.createBlob = function createBlob(data, contentType) {
  if (typeof Blob !== 'undefined') {
    return new Blob([data], { type: contentType });
  }
  // Blob builder is deprecated in FF14 and removed in FF18.
  var bb = new MozBlobBuilder();
  bb.append(data);
  return bb.getBlob(contentType);
};

PDFJS.createObjectURL = (function createObjectURLClosure() {
  // Blob/createObjectURL is not available, falling back to data schema.
  var digits =
    'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';

return function createObjectURL(data, contentType) {
    if (!PDFJS.disableCreateObjectURL &&
        typeof URL !== 'undefined' && URL.createObjectURL) {
      var blob = PDFJS.createBlob(data, contentType);
      return URL.createObjectURL(blob);
    }

var buffer = 'data:' + contentType + ';base64,';
    for (var i = 0, ii = data.length; i < ii; i += 3) {
      var b1 = data[i] & 0xFF;
      var b2 = data[i + 1] & 0xFF;
      var b3 = data[i + 2] & 0xFF;
      var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4);
      var d3 = i + 1 < ii ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64;
      var d4 = i + 2 < ii ? (b3 & 0x3F) : 64;
      buffer += digits[d1] + digits[d2] + digits[d3] + digits[d4];
    }
    return buffer;
  };
})();

function MessageHandler(sourceName, targetName, comObj) {
  this.sourceName = sourceName;
  this.targetName = targetName;
  this.comObj = comObj;
  this.callbackIndex = 1;
  this.postMessageTransfers = true;
  var callbacksCapabilities = this.callbacksCapabilities = {};
  var ah = this.actionHandler = {};

this._onComObjOnMessage = function messageHandlerComObjOnMessage(event) {
    var data = event.data;
    if (data.targetName !== this.sourceName) {
      return;
    }
    if (data.isReply) {
      var callbackId = data.callbackId;
      if (data.callbackId in callbacksCapabilities) {
        var callback = callbacksCapabilities[callbackId];
        delete callbacksCapabilities[callbackId];
        if ('error' in data) {
          callback.reject(data.error);
        } else {
          callback.resolve(data.data);
        }
      } else {
        error('Cannot resolve callback ' + callbackId);
      }
    } else if (data.action in ah) {
      var action = ah[data.action];
      if (data.callbackId) {
        var sourceName = this.sourceName;
        var targetName = data.sourceName;
        Promise.resolve().then(function () {
          return action[0].call(action[1], data.data);
        }).then(function (result) {
          comObj.postMessage({
            sourceName: sourceName,
            targetName: targetName,
            isReply: true,
            callbackId: data.callbackId,
            data: result
          });
        }, function (reason) {
          if (reason instanceof Error) {
            // Serialize error to avoid "DataCloneError"
            reason = reason + '';
          }
          comObj.postMessage({
            sourceName: sourceName,
            targetName: targetName,
            isReply: true,
            callbackId: data.callbackId,
            error: reason
          });
        });
      } else {
        action[0].call(action[1], data.data);
      }
    } else {
      error('Unknown action from worker: ' + data.action);
    }
  }.bind(this);
  comObj.addEventListener('message', this._onComObjOnMessage);
}

MessageHandler.prototype = {
  on: function messageHandlerOn(actionName, handler, scope) {
    var ah = this.actionHandler;
    if (ah[actionName]) {
      error('There is already an actionName called "' + actionName + '"');
    }
    ah[actionName] = [handler, scope];
  },
  /**
   * Sends a message to the comObj to invoke the action with the supplied data.
   * @param {String} actionName Action to call.
   * @param {JSON} data JSON data to send.
   * @param {Array} [transfers] Optional list of transfers/ArrayBuffers
   */
  send: function messageHandlerSend(actionName, data, transfers) {
    var message = {
      sourceName: this.sourceName,
      targetName: this.targetName,
      action: actionName,
      data: data
    };
    this.postMessage(message, transfers);
  },
  /**
   * Sends a message to the comObj to invoke the action with the supplied data.
   * Expects that other side will callback with the response.
   * @param {String} actionName Action to call.
   * @param {JSON} data JSON data to send.
   * @param {Array} [transfers] Optional list of transfers/ArrayBuffers.
   * @returns {Promise} Promise to be resolved with response data.
   */
  sendWithPromise:
    function messageHandlerSendWithPromise(actionName, data, transfers) {
    var callbackId = this.callbackIndex++;
    var message = {
      sourceName: this.sourceName,
      targetName: this.targetName,
      action: actionName,
      data: data,
      callbackId: callbackId
    };
    var capability = createPromiseCapability();
    this.callbacksCapabilities[callbackId] = capability;
    try {
      this.postMessage(message, transfers);
    } catch (e) {
      capability.reject(e);
    }
    return capability.promise;
  },
  /**
   * Sends raw message to the comObj.
   * @private
   * @param message {Object} Raw message.
   * @param transfers List of transfers/ArrayBuffers, or undefined.
   */
  postMessage: function (message, transfers) {
    if (transfers && this.postMessageTransfers) {
      this.comObj.postMessage(message, transfers);
    } else {
      this.comObj.postMessage(message);
    }
  },

destroy: function () {
    this.comObj.removeEventListener('message', this._onComObjOnMessage);
  }
};

// Polyfill from https://github.com/Polymer/URL
/* Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/publicdomain/zero/1.0/ */
(function checkURLConstructor(scope) {
  /* jshint ignore:start */

// feature detect for URL constructor
  var hasWorkingUrl = false;
  try {
    if (typeof URL === 'function' &&
        typeof URL.prototype === 'object' &&
        ('origin' in URL.prototype)) {
      var u = new URL('b', 'http://a');
      u.pathname = 'c%20d';
      hasWorkingUrl = u.href === 'http://a/c%20d';
    }
  } catch(e) { }

if (hasWorkingUrl)
    return;

var relative = Object.create(null);
  relative['ftp'] = 21;
  relative['file'] = 0;
  relative['gopher'] = 70;
  relative['http'] = 80;
  relative['https'] = 443;
  relative['ws'] = 80;
  relative['wss'] = 443;

var relativePathDotMapping = Object.create(null);
  relativePathDotMapping['%2e'] = '.';
  relativePathDotMapping['.%2e'] = '..';
  relativePathDotMapping['%2e.'] = '..';
  relativePathDotMapping['%2e%2e'] = '..';

function isRelativeScheme(scheme) {
    return relative[scheme] !== undefined;
  }

function invalid() {
    clear.call(this);
    this._isInvalid = true;
  }

function IDNAToASCII(h) {
    if ('' == h) {
      invalid.call(this)
    }
    // XXX
    return h.toLowerCase()
  }

function percentEscape(c) {
    var unicode = c.charCodeAt(0);
    if (unicode > 0x20 &&
       unicode < 0x7F &&
       // " # < > ? `
       [0x22, 0x23, 0x3C, 0x3E, 0x3F, 0x60].indexOf(unicode) == -1
      ) {
      return c;
    }
    return encodeURIComponent(c);
  }

function percentEscapeQuery(c) {
    // XXX This actually needs to encode c using encoding and then
    // convert the bytes one-by-one.

var unicode = c.charCodeAt(0);
    if (unicode > 0x20 &&
       unicode < 0x7F &&
       // " # < > ` (do not escape '?')
       [0x22, 0x23, 0x3C, 0x3E, 0x60].indexOf(unicode) == -1
      ) {
      return c;
    }
    return encodeURIComponent(c);
  }

var EOF = undefined,
      ALPHA = /[a-zA-Z]/,
      ALPHANUMERIC = /[a-zA-Z0-9\+\-\.]/;

function parse(input, stateOverride, base) {
    function err(message) {
      errors.push(message)
    }

var state = stateOverride || 'scheme start',
        cursor = 0,
        buffer = '',
        seenAt = false,
        seenBracket = false,
        errors = [];

loop: while ((input[cursor - 1] != EOF || cursor == 0) && !this._isInvalid) {
      var c = input[cursor];
      switch (state) {
        case 'scheme start':
          if (c && ALPHA.test(c)) {
            buffer += c.toLowerCase(); // ASCII-safe
            state = 'scheme';
          } else if (!stateOverride) {
            buffer = '';
            state = 'no scheme';
            continue;
          } else {
            err('Invalid scheme.');
            break loop;
          }
          break;

case 'scheme':
          if (c && ALPHANUMERIC.test(c)) {
            buffer += c.toLowerCase(); // ASCII-safe
          } else if (':' == c) {
            this._scheme = buffer;
            buffer = '';
            if (stateOverride) {
              break loop;
            }
            if (isRelativeScheme(this._scheme)) {
              this._isRelative = true;
            }
            if ('file' == this._scheme) {
              state = 'relative';
            } else if (this._isRelative && base && base._scheme == this._scheme) {
              state = 'relative or authority';
            } else if (this._isRelative) {
              state = 'authority first slash';
            } else {
              state = 'scheme data';
            }
          } else if (!stateOverride) {
            buffer = '';
            cursor = 0;
            state = 'no scheme';
            continue;
          } else if (EOF == c) {
            break loop;
          } else {
            err('Code point not allowed in scheme: ' + c)
            break loop;
          }
          break;

case 'scheme data':
          if ('?' == c) {
            this._query = '?';
            state = 'query';
          } else if ('#' == c) {
            this._fragment = '#';
            state = 'fragment';
          } else {
            // XXX error handling
            if (EOF != c && '\t' != c && '\n' != c && '\r' != c) {
              this._schemeData += percentEscape(c);
            }
          }
          break;

case 'no scheme':
          if (!base || !(isRelativeScheme(base._scheme))) {
            err('Missing scheme.');
            invalid.call(this);
          } else {
            state = 'relative';
            continue;
          }
          break;

case 'relative or authority':
          if ('/' == c && '/' == input[cursor+1]) {
            state = 'authority ignore slashes';
          } else {
            err('Expected /, got: ' + c);
            state = 'relative';
            continue
          }
          break;

case 'relative':
          this._isRelative = true;
          if ('file' != this._scheme)
            this._scheme = base._scheme;
          if (EOF == c) {
            this._host = base._host;
            this._port = base._port;
            this._path = base._path.slice();
            this._query = base._query;
            this._username = base._username;
            this._password = base._password;
            break loop;
          } else if ('/' == c || '\\' == c) {
            if ('\\' == c)
              err('\\ is an invalid code point.');
            state = 'relative slash';
          } else if ('?' == c) {
            this._host = base._host;
            this._port = base._port;
            this._path = base._path.slice();
            this._query = '?';
            this._username = base._username;
            this._password = base._password;
            state = 'query';
          } else if ('#' == c) {
            this._host = base._host;
            this._port = base._port;
            this._path = base._path.slice();
            this._query = base._query;
            this._fragment = '#';
            this._username = base._username;
            this._password = base._password;
            state = 'fragment';
          } else {
            var nextC = input[cursor+1]
            var nextNextC = input[cursor+2]
            if (
              'file' != this._scheme || !ALPHA.test(c) ||
              (nextC != ':' && nextC != '|') ||
              (EOF != nextNextC && '/' != nextNextC && '\\' != nextNextC && '?' != nextNextC && '#' != nextNextC)) {
              this._host = base._host;
              this._port = base._port;
              this._username = base._username;
              this._password = base._password;
              this._path = base._path.slice();
              this._path.pop();
            }
            state = 'relative path';
            continue;
          }
          break;

case 'relative slash':
          if ('/' == c || '\\' == c) {
            if ('\\' == c) {
              err('\\ is an invalid code point.');
            }
            if ('file' == this._scheme) {
              state = 'file host';
            } else {
              state = 'authority ignore slashes';
            }
          } else {
            if ('file' != this._scheme) {
              this._host = base._host;
              this._port = base._port;
              this._username = base._username;
              this._password = base._password;
            }
            state = 'relative path';
            continue;
          }
          break;

case 'authority first slash':
          if ('/' == c) {
            state = 'authority second slash';
          } else {
            err("Expected '/', got: " + c);
            state = 'authority ignore slashes';
            continue;
          }
          break;

case 'authority second slash':
          state = 'authority ignore slashes';
          if ('/' != c) {
            err("Expected '/', got: " + c);
            continue;
          }
          break;

case 'authority ignore slashes':
          if ('/' != c && '\\' != c) {
            state = 'authority';
            continue;
          } else {
            err('Expected authority, got: ' + c);
          }
          break;

case 'authority':
          if ('@' == c) {
            if (seenAt) {
              err('@ already seen.');
              buffer += '%40';
            }
            seenAt = true;
            for (var i = 0; i < buffer.length; i++) {
              var cp = buffer[i];
              if ('\t' == cp || '\n' == cp || '\r' == cp) {
                err('Invalid whitespace in authority.');
                continue;
              }
              // XXX check URL code points
              if (':' == cp && null === this._password) {
                this._password = '';
                continue;
              }
              var tempC = percentEscape(cp);
              (null !== this._password) ? this._password += tempC : this._username += tempC;
            }
            buffer = '';
          } else if (EOF == c || '/' == c || '\\' == c || '?' == c || '#' == c) {
            cursor -= buffer.length;
            buffer = '';
            state = 'host';
            continue;
          } else {
            buffer += c;
          }
          break;

case 'file host':
          if (EOF == c || '/' == c || '\\' == c || '?' == c || '#' == c) {
            if (buffer.length == 2 && ALPHA.test(buffer[0]) && (buffer[1] == ':' || buffer[1] == '|')) {
              state = 'relative path';
            } else if (buffer.length == 0) {
              state = 'relative path start';
            } else {
              this._host = IDNAToASCII.call(this, buffer);
              buffer = '';
              state = 'relative path start';
            }
            continue;
          } else if ('\t' == c || '\n' == c || '\r' == c) {
            err('Invalid whitespace in file host.');
          } else {
            buffer += c;
          }
          break;

case 'host':
        case 'hostname':
          if (':' == c && !seenBracket) {
            // XXX host parsing
            this._host = IDNAToASCII.call(this, buffer);
            buffer = '';
            state = 'port';
            if ('hostname' == stateOverride) {
              break loop;
            }
          } else if (EOF == c || '/' == c || '\\' == c || '?' == c || '#' == c) {
            this._host = IDNAToASCII.call(this, buffer);
            buffer = '';
            state = 'relative path start';
            if (stateOverride) {
              break loop;
            }
            continue;
          } else if ('\t' != c && '\n' != c && '\r' != c) {
            if ('[' == c) {
              seenBracket = true;
            } else if (']' == c) {
              seenBracket = false;
            }
            buffer += c;
          } else {
            err('Invalid code point in host/hostname: ' + c);
          }
          break;

case 'port':
          if (/[0-9]/.test(c)) {
            buffer += c;
          } else if (EOF == c || '/' == c || '\\' == c || '?' == c || '#' == c || stateOverride) {
            if ('' != buffer) {
              var temp = parseInt(buffer, 10);
              if (temp != relative[this._scheme]) {
                this._port = temp + '';
              }
              buffer = '';
            }
            if (stateOverride) {
              break loop;
            }
            state = 'relative path start';
            continue;
          } else if ('\t' == c || '\n' == c || '\r' == c) {
            err('Invalid code point in port: ' + c);
          } else {
            invalid.call(this);
          }
          break;

case 'relative path start':
          if ('\\' == c)
            err("'\\' not allowed in path.");
          state = 'relative path';
          if ('/' != c && '\\' != c) {
            continue;
          }
          break;

case 'relative path':
          if (EOF == c || '/' == c || '\\' == c || (!stateOverride && ('?' == c || '#' == c))) {
            if ('\\' == c) {
              err('\\ not allowed in relative path.');
            }
            var tmp;
            if (tmp = relativePathDotMapping[buffer.toLowerCase()]) {
              buffer = tmp;
            }
            if ('..' == buffer) {
              this._path.pop();
              if ('/' != c && '\\' != c) {
                this._path.push('');
              }
            } else if ('.' == buffer && '/' != c && '\\' != c) {
              this._path.push('');
            } else if ('.' != buffer) {
              if ('file' == this._scheme && this._path.length == 0 && buffer.length == 2 && ALPHA.test(buffer[0]) && buffer[1] == '|') {
                buffer = buffer[0] + ':';
              }
              this._path.push(buffer);
            }
            buffer = '';
            if ('?' == c) {
              this._query = '?';
              state = 'query';
            } else if ('#' == c) {
              this._fragment = '#';
              state = 'fragment';
            }
          } else if ('\t' != c && '\n' != c && '\r' != c) {
            buffer += percentEscape(c);
          }
          break;

case 'query':
          if (!stateOverride && '#' == c) {
            this._fragment = '#';
            state = 'fragment';
          } else if (EOF != c && '\t' != c && '\n' != c && '\r' != c) {
            this._query += percentEscapeQuery(c);
          }
          break;

case 'fragment':
          if (EOF != c && '\t' != c && '\n' != c && '\r' != c) {
            this._fragment += c;
          }
          break;
      }

cursor++;
    }
  }

function clear() {
    this._scheme = '';
    this._schemeData = '';
    this._username = '';
    this._password = null;
    this._host = '';
    this._port = '';
    this._path = [];
    this._query = '';
    this._fragment = '';
    this._isInvalid = false;
    this._isRelative = false;
  }

// Does not process domain names or IP addresses.
  // Does not handle encoding for the query parameter.
  function jURL(url, base /* , encoding */) {
    if (base !== undefined && !(base instanceof jURL))
      base = new jURL(String(base));

this._url = url;
    clear.call(this);

var input = url.replace(/^[ \t\r\n\f]+|[ \t\r\n\f]+$/g, '');
    // encoding = encoding || 'utf-8'

parse.call(this, input, null, base);
  }

jURL.prototype = {
    toString: function() {
      return this.href;
    },
    get href() {
      if (this._isInvalid)
        return this._url;

var authority = '';
      if ('' != this._username || null != this._password) {
        authority = this._username +
            (null != this._password ? ':' + this._password : '') + '@';
      }

return this.protocol +
          (this._isRelative ? '//' + authority + this.host : '') +
          this.pathname + this._query + this._fragment;
    },
    set href(href) {
      clear.call(this);
      parse.call(this, href);
    },

get protocol() {
      return this._scheme + ':';
    },
    set protocol(protocol) {
      if (this._isInvalid)
        return;
      parse.call(this, protocol + ':', 'scheme start');
    },

get host() {
      return this._isInvalid ? '' : this._port ?
          this._host + ':' + this._port : this._host;
    },
    set host(host) {
      if (this._isInvalid || !this._isRelative)
        return;
      parse.call(this, host, 'host');
    },

get hostname() {
      return this._host;
    },
    set hostname(hostname) {
      if (this._isInvalid || !this._isRelative)
        return;
      parse.call(this, hostname, 'hostname');
    },

get port() {
      return this._port;
    },
    set port(port) {
      if (this._isInvalid || !this._isRelative)
        return;
      parse.call(this, port, 'port');
    },

get pathname() {
      return this._isInvalid ? '' : this._isRelative ?
          '/' + this._path.join('/') : this._schemeData;
    },
    set pathname(pathname) {
      if (this._isInvalid || !this._isRelative)
        return;
      this._path = [];
      parse.call(this, pathname, 'relative path start');
    },

get search() {
      return this._isInvalid || !this._query || '?' == this._query ?
          '' : this._query;
    },
    set search(search) {
      if (this._isInvalid || !this._isRelative)
        return;
      this._query = '?';
      if ('?' == search[0])
        search = search.slice(1);
      parse.call(this, search, 'query');
    },

get hash() {
      return this._isInvalid || !this._fragment || '#' == this._fragment ?
          '' : this._fragment;
    },
    set hash(hash) {
      if (this._isInvalid)
        return;
      this._fragment = '#';
      if ('#' == hash[0])
        hash = hash.slice(1);
      parse.call(this, hash, 'fragment');
    },

get origin() {
      var host;
      if (this._isInvalid || !this._scheme) {
        return '';
      }
      // javascript: Gecko returns String(""), WebKit/Blink String("null")
      // Gecko throws error for "data://"
      // data: Gecko returns "", Blink returns "data://", WebKit returns "null"
      // Gecko returns String("") for file: mailto:
      // WebKit/Blink returns String("SCHEME://") for file: mailto:
      switch (this._scheme) {
        case 'data':
        case 'file':
        case 'javascript':
        case 'mailto':
          return 'null';
      }
      host = this.host;
      if (!host) {
        return '';
      }
      return this._scheme + '://' + host;
    }
  };

// Copy over the static methods
  var OriginalURL = scope.URL;
  if (OriginalURL) {
    jURL.createObjectURL = function(blob) {
      // IE extension allows a second optional options argument.
      // http://msdn.microsoft.com/en-us/library/ie/hh772302(v=vs.85).aspx
      return OriginalURL.createObjectURL.apply(OriginalURL, arguments);
    };
    jURL.revokeObjectURL = function(url) {
      OriginalURL.revokeObjectURL(url);
    };
  }

scope.URL = jURL;
  /* jshint ignore:end */
})(globalScope);

exports.FONT_IDENTITY_MATRIX = FONT_IDENTITY_MATRIX;
exports.IDENTITY_MATRIX = IDENTITY_MATRIX;
exports.OPS = OPS;
exports.UNSUPPORTED_FEATURES = UNSUPPORTED_FEATURES;
exports.AnnotationBorderStyleType = AnnotationBorderStyleType;
exports.AnnotationFlag = AnnotationFlag;
exports.AnnotationType = AnnotationType;
exports.FontType = FontType;
exports.ImageKind = ImageKind;
exports.InvalidPDFException = InvalidPDFException;
exports.LinkTarget = LinkTarget;
exports.LinkTargetStringMap = LinkTargetStringMap;
exports.MessageHandler = MessageHandler;
exports.MissingDataException = MissingDataException;
exports.MissingPDFException = MissingPDFException;
exports.NotImplementedException = NotImplementedException;
exports.PasswordException = PasswordException;
exports.PasswordResponses = PasswordResponses;
exports.StatTimer = StatTimer;
exports.StreamType = StreamType;
exports.TextRenderingMode = TextRenderingMode;
exports.UnexpectedResponseException = UnexpectedResponseException;
exports.UnknownErrorException = UnknownErrorException;
exports.Util = Util;
exports.XRefParseException = XRefParseException;
exports.assert = assert;
exports.bytesToString = bytesToString;
exports.combineUrl = combineUrl;
exports.createPromiseCapability = createPromiseCapability;
exports.deprecated = deprecated;
exports.error = error;
exports.info = info;
exports.isArray = isArray;
exports.isArrayBuffer = isArrayBuffer;
exports.isBool = isBool;
exports.isEmptyObj = isEmptyObj;
exports.isExternalLinkTargetSet = isExternalLinkTargetSet;
exports.isInt = isInt;
exports.isNum = isNum;
exports.isString = isString;
exports.isValidUrl = isValidUrl;
exports.addLinkAttributes = addLinkAttributes;
exports.loadJpegStream = loadJpegStream;
exports.log2 = log2;
exports.readInt8 = readInt8;
exports.readUint16 = readUint16;
exports.readUint32 = readUint32;
exports.removeNullCharacters = removeNullCharacters;
exports.shadow = shadow;
exports.string32 = string32;
exports.stringToBytes = stringToBytes;
exports.stringToPDFString = stringToPDFString;
exports.stringToUTF8String = stringToUTF8String;
exports.utf8StringToString = utf8StringToString;
exports.warn = warn;
}));

(function (root, factory) {
  {
    factory((root.pdfjsDisplayAnnotationLayer = {}), root.pdfjsSharedUtil,
      root.pdfjsDisplayDOMUtils);
  }
}(this, function (exports, sharedUtil, displayDOMUtils) {

var AnnotationBorderStyleType = sharedUtil.AnnotationBorderStyleType;
var AnnotationType = sharedUtil.AnnotationType;
var Util = sharedUtil.Util;
var addLinkAttributes = sharedUtil.addLinkAttributes;
var warn = sharedUtil.warn;
var CustomStyle = displayDOMUtils.CustomStyle;

/**
 * @typedef {Object} AnnotationElementParameters
 * @property {Object} data
 * @property {HTMLDivElement} layer
 * @property {PDFPage} page
 * @property {PageViewport} viewport
 * @property {IPDFLinkService} linkService
 */

/**
 * @class
 * @alias AnnotationElementFactory
 */
function AnnotationElementFactory() {}
AnnotationElementFactory.prototype =
    /** @lends AnnotationElementFactory.prototype */ {
  /**
   * @param {AnnotationElementParameters} parameters
   * @returns {AnnotationElement}
   */
  create: function AnnotationElementFactory_create(parameters) {
    var subtype = parameters.data.annotationType;

switch (subtype) {
      case AnnotationType.LINK:
        return new LinkAnnotationElement(parameters);

case AnnotationType.TEXT:
        return new TextAnnotationElement(parameters);

case AnnotationType.WIDGET:
        return new WidgetAnnotationElement(parameters);

case AnnotationType.POPUP:
        return new PopupAnnotationElement(parameters);

case AnnotationType.HIGHLIGHT:
        return new HighlightAnnotationElement(parameters);

case AnnotationType.UNDERLINE:
        return new UnderlineAnnotationElement(parameters);

case AnnotationType.SQUIGGLY:
        return new SquigglyAnnotationElement(parameters);

case AnnotationType.STRIKEOUT:
        return new StrikeOutAnnotationElement(parameters);

default:
        throw new Error('Unimplemented annotation type "' + subtype + '"');
    }
  }
};

/**
 * @class
 * @alias AnnotationElement
 */
var AnnotationElement = (function AnnotationElementClosure() {
  function AnnotationElement(parameters) {
    this.data = parameters.data;
    this.layer = parameters.layer;
    this.page = parameters.page;
    this.viewport = parameters.viewport;
    this.linkService = parameters.linkService;

this.container = this._createContainer();
  }

AnnotationElement.prototype = /** @lends AnnotationElement.prototype */ {
    /**
     * Create an empty container for the annotation's HTML element.
     *
     * @private
     * @memberof AnnotationElement
     * @returns {HTMLSectionElement}
     */
    _createContainer: function AnnotationElement_createContainer() {
      var data = this.data, page = this.page, viewport = this.viewport;
      var container = document.createElement('section');
      var width = data.rect[2] - data.rect[0];
      var height = data.rect[3] - data.rect[1];

container.setAttribute('data-annotation-id', data.id);

// Do *not* modify `data.rect`, since that will corrupt the annotation
      // position on subsequent calls to `_createContainer` (see issue 6804).
      var rect = Util.normalizeRect([
        data.rect[0],
        page.view[3] - data.rect[1] + page.view[1],
        data.rect[2],
        page.view[3] - data.rect[3] + page.view[1]
      ]);

CustomStyle.setProp('transform', container,
                          'matrix(' + viewport.transform.join(',') + ')');
      CustomStyle.setProp('transformOrigin', container,
                          -rect[0] + 'px ' + -rect[1] + 'px');

if (data.borderStyle.width > 0) {
        container.style.borderWidth = data.borderStyle.width + 'px';
        if (data.borderStyle.style !== AnnotationBorderStyleType.UNDERLINE) {
          // Underline styles only have a bottom border, so we do not need
          // to adjust for all borders. This yields a similar result as
          // Adobe Acrobat/Reader.
          width = width - 2 * data.borderStyle.width;
          height = height - 2 * data.borderStyle.width;
        }

var horizontalRadius = data.borderStyle.horizontalCornerRadius;
        var verticalRadius = data.borderStyle.verticalCornerRadius;
        if (horizontalRadius > 0 || verticalRadius > 0) {
          var radius = horizontalRadius + 'px / ' + verticalRadius + 'px';
          CustomStyle.setProp('borderRadius', container, radius);
        }

switch (data.borderStyle.style) {
          case AnnotationBorderStyleType.SOLID:
            container.style.borderStyle = 'solid';
            break;

case AnnotationBorderStyleType.DASHED:
            container.style.borderStyle = 'dashed';
            break;

case AnnotationBorderStyleType.BEVELED:
            warn('Unimplemented border style: beveled');
            break;

case AnnotationBorderStyleType.INSET:
            warn('Unimplemented border style: inset');
            break;

case AnnotationBorderStyleType.UNDERLINE:
            container.style.borderBottomStyle = 'solid';
            break;

default:
            break;
        }

if (data.color) {
          container.style.borderColor =
            Util.makeCssRgb(data.color[0] | 0,
                            data.color[1] | 0,
                            data.color[2] | 0);
        } else {
          // Transparent (invisible) border, so do not draw it at all.
          container.style.borderWidth = 0;
        }
      }

container.style.left = rect[0] + 'px';
      container.style.top = rect[1] + 'px';

container.style.width = width + 'px';
      container.style.height = height + 'px';

return container;
    },

/**
     * Render the annotation's HTML element in the empty container.
     *
     * @public
     * @memberof AnnotationElement
     */
    render: function AnnotationElement_render() {
      throw new Error('Abstract method AnnotationElement.render called');
    }
  };

return AnnotationElement;
})();

/**
 * @class
 * @alias LinkAnnotationElement
 */
var LinkAnnotationElement = (function LinkAnnotationElementClosure() {
  function LinkAnnotationElement(parameters) {
    AnnotationElement.call(this, parameters);
  }

Util.inherit(LinkAnnotationElement, AnnotationElement, {
    /**
     * Render the link annotation's HTML element in the empty container.
     *
     * @public
     * @memberof LinkAnnotationElement
     * @returns {HTMLSectionElement}
     */
    render: function LinkAnnotationElement_render() {
      this.container.className = 'linkAnnotation';

var link = document.createElement('a');
      addLinkAttributes(link, { url: this.data.url });

if (!this.data.url) {
        if (this.data.action) {
          this._bindNamedAction(link, this.data.action);
        } else {
          this._bindLink(link, ('dest' in this.data) ? this.data.dest : null);
        }
      }

this.container.appendChild(link);
      return this.container;
    },

/**
     * Bind internal links to the link element.
     *
     * @private
     * @param {Object} link
     * @param {Object} destination
     * @memberof LinkAnnotationElement
     */
    _bindLink: function LinkAnnotationElement_bindLink(link, destination) {
      var self = this;

link.href = this.linkService.getDestinationHash(destination);
      link.onclick = function() {
        if (destination) {
          self.linkService.navigateTo(destination);
        }
        return false;
      };
      if (destination) {
        link.className = 'internalLink';
      }
    },

/**
     * Bind named actions to the link element.
     *
     * @private
     * @param {Object} link
     * @param {Object} action
     * @memberof LinkAnnotationElement
     */
    _bindNamedAction:
        function LinkAnnotationElement_bindNamedAction(link, action) {
      var self = this;

link.href = this.linkService.getAnchorUrl('');
      link.onclick = function() {
        self.linkService.executeNamedAction(action);
        return false;
      };
      link.className = 'internalLink';
    }
  });

return LinkAnnotationElement;
})();

/**
 * @class
 * @alias TextAnnotationElement
 */
var TextAnnotationElement = (function TextAnnotationElementClosure() {
  function TextAnnotationElement(parameters) {
    AnnotationElement.call(this, parameters);
  }

Util.inherit(TextAnnotationElement, AnnotationElement, {
    /**
     * Render the text annotation's HTML element in the empty container.
     *
     * @public
     * @memberof TextAnnotationElement
     * @returns {HTMLSectionElement}
     */
    render: function TextAnnotationElement_render() {
      this.container.className = 'textAnnotation';

if (!this.data.hasPopup) {
        var popupElement = new PopupElement({
          container: this.container,
          trigger: image,
          color: this.data.color,
          title: this.data.title,
          contents: this.data.contents,
          hideWrapper: true
        });
        var popup = popupElement.render();

// Position the popup next to the Text annotation's container.
        popup.style.left = image.style.width;

this.container.appendChild(popup);
      }

this.container.appendChild(image);
      return this.container;
    }
  });

return TextAnnotationElement;
})();

/**
 * @class
 * @alias WidgetAnnotationElement
 */
var WidgetAnnotationElement = (function WidgetAnnotationElementClosure() {
  function WidgetAnnotationElement(parameters) {
    AnnotationElement.call(this, parameters);
  }

Util.inherit(WidgetAnnotationElement, AnnotationElement, {
    /**
     * Render the widget annotation's HTML element in the empty container.
     *
     * @public
     * @memberof WidgetAnnotationElement
     * @returns {HTMLSectionElement}
     */
    render: function WidgetAnnotationElement_render() {
      var content = document.createElement('div');
      content.textContent = this.data.fieldValue;
      var textAlignment = this.data.textAlignment;
      content.style.textAlign = ['left', 'center', 'right'][textAlignment];
      content.style.verticalAlign = 'middle';
      content.style.display = 'table-cell';

var font = (this.data.fontRefName ?
        this.page.commonObjs.getData(this.data.fontRefName) : null);
      this._setTextStyle(content, font);

this.container.appendChild(content);
      return this.container;
    },

/**
     * Apply text styles to the text in the element.
     *
     * @private
     * @param {HTMLDivElement} element
     * @param {Object} font
     * @memberof WidgetAnnotationElement
     */
    _setTextStyle:
        function WidgetAnnotationElement_setTextStyle(element, font) {
      // TODO: This duplicates some of the logic in CanvasGraphics.setFont().
      var style = element.style;
      style.fontSize = this.data.fontSize + 'px';
      style.direction = (this.data.fontDirection < 0 ? 'rtl': 'ltr');

if (!font) {
        return;
      }

style.fontWeight = (font.black ?
        (font.bold ? '900' : 'bold') :
        (font.bold ? 'bold' : 'normal'));
      style.fontStyle = (font.italic ? 'italic' : 'normal');

// Use a reasonable default font if the font doesn't specify a fallback.
      var fontFamily = font.loadedName ? '"' + font.loadedName + '", ' : '';
      var fallbackName = font.fallbackName || 'Helvetica, sans-serif';
      style.fontFamily = fontFamily + fallbackName;
    }
  });

return WidgetAnnotationElement;
})();

/**
 * @class
 * @alias PopupAnnotationElement
 */
var PopupAnnotationElement = (function PopupAnnotationElementClosure() {
  function PopupAnnotationElement(parameters) {
    AnnotationElement.call(this, parameters);
  }

Util.inherit(PopupAnnotationElement, AnnotationElement, {
    /**
     * Render the popup annotation's HTML element in the empty container.
     *
     * @public
     * @memberof PopupAnnotationElement
     * @returns {HTMLSectionElement}
     */
    render: function PopupAnnotationElement_render() {
      this.container.className = 'popupAnnotation';

var selector = '[data-annotation-id="' + this.data.parentId + '"]';
      var parentElement = this.layer.querySelector(selector);
      if (!parentElement) {
        return this.container;
      }

var popup = new PopupElement({
        container: this.container,
        trigger: parentElement,
        color: this.data.color,
        title: this.data.title,
        contents: this.data.contents
      });

// Position the popup next to the parent annotation's container.
      // PDF viewers ignore a popup annotation's rectangle.
      var parentLeft = parseFloat(parentElement.style.left);
      var parentWidth = parseFloat(parentElement.style.width);
      CustomStyle.setProp('transformOrigin', this.container,
                          -(parentLeft + parentWidth) + 'px -' +
                          parentElement.style.top);
      this.container.style.left = (parentLeft + parentWidth) + 'px';

this.container.appendChild(popup.render());
      return this.container;
    }
  });

return PopupAnnotationElement;
})();

/**
 * @class
 * @alias PopupElement
 */
var PopupElement = (function PopupElementClosure() {
  var BACKGROUND_ENLIGHT = 0.7;

function PopupElement(parameters) {
    this.container = parameters.container;
    this.trigger = parameters.trigger;
    this.color = parameters.color;
    this.title = parameters.title;
    this.contents = parameters.contents;
    this.hideWrapper = parameters.hideWrapper || false;

this.pinned = false;
  }

PopupElement.prototype = /** @lends PopupElement.prototype */ {
    /**
     * Render the popup's HTML element.
     *
     * @public
     * @memberof PopupElement
     * @returns {HTMLSectionElement}
     */
    render: function PopupElement_render() {
      var wrapper = document.createElement('div');
      wrapper.className = 'popupWrapper';

// For Popup annotations we hide the entire section because it contains
      // only the popup. However, for Text annotations without a separate Popup
      // annotation, we cannot hide the entire container as the image would
      // disappear too. In that special case, hiding the wrapper suffices.
      this.hideElement = (this.hideWrapper ? wrapper : this.container);
      this.hideElement.setAttribute('hidden', true);

var popup = document.createElement('div');
      popup.className = 'popup';

var color = this.color;
      if (color) {
        // Enlighten the color.
        var r = BACKGROUND_ENLIGHT * (255 - color[0]) + color[0];
        var g = BACKGROUND_ENLIGHT * (255 - color[1]) + color[1];
        var b = BACKGROUND_ENLIGHT * (255 - color[2]) + color[2];
        popup.style.backgroundColor = Util.makeCssRgb(r | 0, g | 0, b | 0);
      }

var contents = this._formatContents(this.contents);
      var title = document.createElement('h1');
      title.textContent = this.title;

// Attach the event listeners to the trigger element.
      this.trigger.addEventListener('click', this._toggle.bind(this));
      this.trigger.addEventListener('mouseover', this._show.bind(this, false));
      this.trigger.addEventListener('mouseout', this._hide.bind(this, false));
      popup.addEventListener('click', this._hide.bind(this, true));

popup.appendChild(title);
      popup.appendChild(contents);
      wrapper.appendChild(popup);
      return wrapper;
    },

/**
     * Format the contents of the popup by adding newlines where necessary.
     *
     * @private
     * @param {string} contents
     * @memberof PopupElement
     * @returns {HTMLParagraphElement}
     */
    _formatContents: function PopupElement_formatContents(contents) {
      var p = document.createElement('p');
      var lines = contents.split(/(?:\r\n?|\n)/);
      for (var i = 0, ii = lines.length; i < ii; ++i) {
        var line = lines[i];
        p.appendChild(document.createTextNode(line));
        if (i < (ii - 1)) {
          p.appendChild(document.createElement('br'));
        }
      }
      return p;
    },

/**
     * Toggle the visibility of the popup.
     *
     * @private
     * @memberof PopupElement
     */
    _toggle: function PopupElement_toggle() {
      if (this.pinned) {
        this._hide(true);
      } else {
        this._show(true);
      }
    },

/**
     * Show the popup.
     *
     * @private
     * @param {boolean} pin
     * @memberof PopupElement
     */
    _show: function PopupElement_show(pin) {
      if (pin) {
        this.pinned = true;
      }
      if (this.hideElement.hasAttribute('hidden')) {
        this.hideElement.removeAttribute('hidden');
        this.container.style.zIndex += 1;
      }
    },

/**
     * Hide the popup.
     *
     * @private
     * @param {boolean} unpin
     * @memberof PopupElement
     */
    _hide: function PopupElement_hide(unpin) {
      if (unpin) {
        this.pinned = false;
      }
      if (!this.hideElement.hasAttribute('hidden') && !this.pinned) {
        this.hideElement.setAttribute('hidden', true);
        this.container.style.zIndex -= 1;
      }
    }
  };

return PopupElement;
})();

/**
 * @class
 * @alias HighlightAnnotationElement
 */
var HighlightAnnotationElement = (
    function HighlightAnnotationElementClosure() {
  function HighlightAnnotationElement(parameters) {
    AnnotationElement.call(this, parameters);
  }

Util.inherit(HighlightAnnotationElement, AnnotationElement, {
    /**
     * Render the highlight annotation's HTML element in the empty container.
     *
     * @public
     * @memberof HighlightAnnotationElement
     * @returns {HTMLSectionElement}
     */
    render: function HighlightAnnotationElement_render() {
      this.container.className = 'highlightAnnotation';
      return this.container;
    }
  });

return HighlightAnnotationElement;
})();

/**
 * @class
 * @alias UnderlineAnnotationElement
 */
var UnderlineAnnotationElement = (
    function UnderlineAnnotationElementClosure() {
  function UnderlineAnnotationElement(parameters) {
    AnnotationElement.call(this, parameters);
  }

Util.inherit(UnderlineAnnotationElement, AnnotationElement, {
    /**
     * Render the underline annotation's HTML element in the empty container.
     *
     * @public
     * @memberof UnderlineAnnotationElement
     * @returns {HTMLSectionElement}
     */
    render: function UnderlineAnnotationElement_render() {
      this.container.className = 'underlineAnnotation';
      return this.container;
    }
  });

return UnderlineAnnotationElement;
})();

/**
 * @class
 * @alias SquigglyAnnotationElement
 */
var SquigglyAnnotationElement = (function SquigglyAnnotationElementClosure() {
  function SquigglyAnnotationElement(parameters) {
    AnnotationElement.call(this, parameters);
  }

Util.inherit(SquigglyAnnotationElement, AnnotationElement, {
    /**
     * Render the squiggly annotation's HTML element in the empty container.
     *
     * @public
     * @memberof SquigglyAnnotationElement
     * @returns {HTMLSectionElement}
     */
    render: function SquigglyAnnotationElement_render() {
      this.container.className = 'squigglyAnnotation';
      return this.container;
    }
  });

return SquigglyAnnotationElement;
})();

/**
 * @class
 * @alias StrikeOutAnnotationElement
 */
var StrikeOutAnnotationElement = (
    function StrikeOutAnnotationElementClosure() {
  function StrikeOutAnnotationElement(parameters) {
    AnnotationElement.call(this, parameters);
  }

Util.inherit(StrikeOutAnnotationElement, AnnotationElement, {
    /**
     * Render the strikeout annotation's HTML element in the empty container.
     *
     * @public
     * @memberof StrikeOutAnnotationElement
     * @returns {HTMLSectionElement}
     */
    render: function StrikeOutAnnotationElement_render() {
      this.container.className = 'strikeoutAnnotation';
      return this.container;
    }
  });

return StrikeOutAnnotationElement;
})();

/**
 * @typedef {Object} AnnotationLayerParameters
 * @property {PageViewport} viewport
 * @property {HTMLDivElement} div
 * @property {Array} annotations
 * @property {PDFPage} page
 * @property {IPDFLinkService} linkService
 */

/**
 * @class
 * @alias AnnotationLayer
 */
var AnnotationLayer = (function AnnotationLayerClosure() {
  return {
    /**
     * Render a new annotation layer with all annotation elements.
     *
     * @public
     * @param {AnnotationLayerParameters} parameters
     * @memberof AnnotationLayer
     */
    render: function AnnotationLayer_render(parameters) {
      var annotationElementFactory = new AnnotationElementFactory();

for (var i = 0, ii = parameters.annotations.length; i < ii; i++) {
        var data = parameters.annotations[i];
        if (!data || !data.hasHtml) {
          continue;
        }

var properties = {
          data: data,
          layer: parameters.div,
          page: parameters.page,
          viewport: parameters.viewport,
          linkService: parameters.linkService
        };
        var element = annotationElementFactory.create(properties);
        parameters.div.appendChild(element.render());
      }
    },

/**
     * Update the annotation elements on existing annotation layer.
     *
     * @public
     * @param {AnnotationLayerParameters} parameters
     * @memberof AnnotationLayer
     */
    update: function AnnotationLayer_update(parameters) {
      for (var i = 0, ii = parameters.annotations.length; i < ii; i++) {
        var data = parameters.annotations[i];
        var element = parameters.div.querySelector(
          '[data-annotation-id="' + data.id + '"]');
        if (element) {
          CustomStyle.setProp('transform', element,
            'matrix(' + parameters.viewport.transform.join(',') + ')');
        }
      }
      parameters.div.removeAttribute('hidden');
    }
  };
})();

PDFJS.AnnotationLayer = AnnotationLayer;

exports.AnnotationLayer = AnnotationLayer;
}));

(function (root, factory) {
  {
    factory((root.pdfjsDisplayFontLoader = {}), root.pdfjsSharedUtil,
      root.pdfjsSharedGlobal);
  }
}(this, function (exports, sharedUtil, sharedGlobal) {

var assert = sharedUtil.assert;
var bytesToString = sharedUtil.bytesToString;
var string32 = sharedUtil.string32;
var shadow = sharedUtil.shadow;
var warn = sharedUtil.warn;

var PDFJS = sharedGlobal.PDFJS;
var globalScope = sharedGlobal.globalScope;
var isWorker = sharedGlobal.isWorker;

var styleSheet = styleElement.sheet;
    styleSheet.insertRule(rule, styleSheet.cssRules.length);
  },

clear: function fontLoaderClear() {
    var styleElement = this.styleElement;
    if (styleElement) {
      styleElement.parentNode.removeChild(styleElement);
      styleElement = this.styleElement = null;
    }
    this.nativeFontFaces.forEach(function(nativeFontFace) {
      document.fonts.delete(nativeFontFace);
    });
    this.nativeFontFaces.length = 0;
  },
  get loadTestFont() {
    // This is a CFF font with 1 glyph for '.' that fills its entire width and
    // height.
    return shadow(this, 'loadTestFont', atob(
      'T1RUTwALAIAAAwAwQ0ZGIDHtZg4AAAOYAAAAgUZGVE1lkzZwAAAEHAAAABxHREVGABQAFQ' +
      'AABDgAAAAeT1MvMlYNYwkAAAEgAAAAYGNtYXABDQLUAAACNAAAAUJoZWFk/xVFDQAAALwA' +
      'AAA2aGhlYQdkA+oAAAD0AAAAJGhtdHgD6AAAAAAEWAAAAAZtYXhwAAJQAAAAARgAAAAGbm' +
      'FtZVjmdH4AAAGAAAAAsXBvc3T/hgAzAAADeAAAACAAAQAAAAEAALZRFsRfDzz1AAsD6AAA' +
      'AADOBOTLAAAAAM4KHDwAAAAAA+gDIQAAAAgAAgAAAAAAAAABAAADIQAAAFoD6AAAAAAD6A' +
      'ABAAAAAAAAAAAAAAAAAAAAAQAAUAAAAgAAAAQD6AH0AAUAAAKKArwAAACMAooCvAAAAeAA' +
      'MQECAAACAAYJAAAAAAAAAAAAAQAAAAAAAAAAAAAAAFBmRWQAwAAuAC4DIP84AFoDIQAAAA' +
      'AAAQAAAAAAAAAAACAAIAABAAAADgCuAAEAAAAAAAAAAQAAAAEAAAAAAAEAAQAAAAEAAAAA' +
      'AAIAAQAAAAEAAAAAAAMAAQAAAAEAAAAAAAQAAQAAAAEAAAAAAAUAAQAAAAEAAAAAAAYAAQ' +
      'AAAAMAAQQJAAAAAgABAAMAAQQJAAEAAgABAAMAAQQJAAIAAgABAAMAAQQJAAMAAgABAAMA' +
      'AQQJAAQAAgABAAMAAQQJAAUAAgABAAMAAQQJAAYAAgABWABYAAAAAAAAAwAAAAMAAAAcAA' +
      'EAAAAAADwAAwABAAAAHAAEACAAAAAEAAQAAQAAAC7//wAAAC7////TAAEAAAAAAAABBgAA' +
      'AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAA' +
      'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
      'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
      'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
      'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAAA' +
      'AAAAD/gwAyAAAAAQAAAAAAAAAAAAAAAAAAAAABAAQEAAEBAQJYAAEBASH4DwD4GwHEAvgc' +
      'A/gXBIwMAYuL+nz5tQXkD5j3CBLnEQACAQEBIVhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWF' +
      'hYWFhYWFhYAAABAQAADwACAQEEE/t3Dov6fAH6fAT+fPp8+nwHDosMCvm1Cvm1DAz6fBQA' +
      'AAAAAAABAAAAAMmJbzEAAAAAzgTjFQAAAADOBOQpAAEAAAAAAAAADAAUAAQAAAABAAAAAg' +
      'ABAAAAAAAAAAAD6AAAAAAAAA=='
    ));
  },

addNativeFontFace: function fontLoader_addNativeFontFace(nativeFontFace) {
    this.nativeFontFaces.push(nativeFontFace);
    document.fonts.add(nativeFontFace);
  },

bind: function fontLoaderBind(fonts, callback) {
    assert(!isWorker, 'bind() shall be called from main thread');

var rules = [];
    var fontsToLoad = [];
    var fontLoadPromises = [];
    var getNativeFontPromise = function(nativeFontFace) {
      // Return a promise that is always fulfilled, even when the font fails to
      // load.
      return nativeFontFace.loaded.catch(function(e) {
        warn('Failed to load font "' + nativeFontFace.family + '": ' + e);
      });
    };
    for (var i = 0, ii = fonts.length; i < ii; i++) {
      var font = fonts[i];

// Add the font to the DOM only once or skip if the font
      // is already loaded.
      if (font.attached || font.loading === false) {
        continue;
      }
      font.attached = true;

if (FontLoader.isFontLoadingAPISupported) {
        var nativeFontFace = font.createNativeFontFace();
        if (nativeFontFace) {
          this.addNativeFontFace(nativeFontFace);
          fontLoadPromises.push(getNativeFontPromise(nativeFontFace));
        }
      } else {
        var rule = font.createFontFaceRule();
        if (rule) {
          this.insertRule(rule);
          rules.push(rule);
          fontsToLoad.push(font);
        }
      }
    }

queueLoadingCallback: function FontLoader_queueLoadingCallback(callback) {
    function LoadLoader_completeRequest() {
      assert(!request.end, 'completeRequest() cannot be called twice');
      request.end = Date.now();

// sending all completed requests in order how they were queued
      while (context.requests.length > 0 && context.requests[0].end) {
        var otherRequest = context.requests.shift();
        setTimeout(otherRequest.callback, 0);
      }
    }

var context = this.loadingContext;
    var requestId = 'pdfjs-font-loading-' + (context.nextRequestId++);
    var request = {
      id: requestId,
      complete: LoadLoader_completeRequest,
      callback: callback,
      started: Date.now()
    };
    context.requests.push(request);
    return request;
  },

prepareFontLoadEvent: function fontLoaderPrepareFontLoadEvent(rules,
                                                                fonts,
                                                                request) {
      /** Hack begin */
      // There's currently no event when a font has finished downloading so the
      // following code is a dirty hack to 'guess' when a font is
      // ready. It's assumed fonts are loaded in order, so add a known test
      // font after the desired fonts and then test for the loading of that
      // test font.

function int32(data, offset) {
        return (data.charCodeAt(offset) << 24) |
               (data.charCodeAt(offset + 1) << 16) |
               (data.charCodeAt(offset + 2) << 8) |
               (data.charCodeAt(offset + 3) & 0xff);
      }

function spliceString(s, offset, remove, insert) {
        var chunk1 = s.substr(0, offset);
        var chunk2 = s.substr(offset + remove);
        return chunk1 + insert + chunk2;
      }

var i, ii;

var canvas = document.createElement('canvas');
      canvas.width = 1;
      canvas.height = 1;
      var ctx = canvas.getContext('2d');

var loadTestFontId = 'lt' + Date.now() + this.loadTestFontId++;
      // Chromium seems to cache fonts based on a hash of the actual font data,
      // so the font must be modified for each load test else it will appear to
      // be loaded already.
      // TODO: This could maybe be made faster by avoiding the btoa of the full
      // font by splitting it in chunks before hand and padding the font id.
      var data = this.loadTestFont;
      var COMMENT_OFFSET = 976; // has to be on 4 byte boundary (for checksum)
      data = spliceString(data, COMMENT_OFFSET, loadTestFontId.length,
                          loadTestFontId);
      // CFF checksum is important for IE, adjusting it
      var CFF_CHECKSUM_OFFSET = 16;
      var XXXX_VALUE = 0x58585858; // the "comment" filled with 'X'
      var checksum = int32(data, CFF_CHECKSUM_OFFSET);
      for (i = 0, ii = loadTestFontId.length - 3; i < ii; i += 4) {
        checksum = (checksum - XXXX_VALUE + int32(loadTestFontId, i)) | 0;
      }
      if (i < loadTestFontId.length) { // align to 4 bytes boundary
        checksum = (checksum - XXXX_VALUE +
                    int32(loadTestFontId + 'XXX', i)) | 0;
      }
      data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, string32(checksum));

var url = 'url(data:font/opentype;base64,' + btoa(data) + ');';
      var rule = '@font-face { font-family:"' + loadTestFontId + '";src:' +
                 url + '}';
      this.insertRule(rule);

var names = [];
      for (i = 0, ii = fonts.length; i < ii; i++) {
        names.push(fonts[i].loadedName);
      }
      names.push(loadTestFontId);

var div = document.createElement('div');
      div.setAttribute('style',
                       'visibility: hidden;' +
                       'width: 10px; height: 10px;' +
                       'position: absolute; top: 0px; left: 0px;');
      for (i = 0, ii = names.length; i < ii; ++i) {
        var span = document.createElement('span');
        span.textContent = 'Hi';
        span.style.fontFamily = names[i];
        div.appendChild(span);
      }
      document.body.appendChild(div);

isFontReady(loadTestFontId, function() {
        document.body.removeChild(div);
        request.complete();
      });
      /** Hack end */
  }
};
FontLoader.isFontLoadingAPISupported = (!isWorker &&
  typeof document !== 'undefined' && !!document.fonts);
Object.defineProperty(FontLoader, 'isSyncFontLoadingSupported', {
  get: function () {
    var supported = false;

// User agent string sniffing is bad, but there is no reliable way to tell
    // if font is fully loaded and ready to be used with canvas.
    var userAgent = window.navigator.userAgent;
    var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(userAgent);
    if (m && m[1] >= 14) {
      supported = true;
    }
    // TODO other browsers
    if (userAgent === 'node') {
      supported = true;
    }
    return shadow(FontLoader, 'isSyncFontLoadingSupported', supported);
  },
  enumerable: true,
  configurable: true
});

if (PDFJS.disableFontFace) {
        this.disableFontFace = true;
        return null;
      }

var nativeFontFace = new FontFace(this.loadedName, this.data, {});

if (PDFJS.pdfBug && 'FontInspector' in globalScope &&
          globalScope['FontInspector'].enabled) {
        globalScope['FontInspector'].fontAdded(this);
      }
      return nativeFontFace;
    },

createFontFaceRule: function FontFaceObject_createFontFaceRule() {
      if (!this.data) {
        return null;
      }

if (PDFJS.disableFontFace) {
        this.disableFontFace = true;
        return null;
      }

var data = bytesToString(new Uint8Array(this.data));
      var fontName = this.loadedName;

// Add the font-face rule to the document
      var url = ('url(data:' + this.mimetype + ';base64,' +
                 window.btoa(data) + ');');
      var rule = '@font-face { font-family:"' + fontName + '";src:' + url + '}';

if (PDFJS.pdfBug && 'FontInspector' in globalScope &&
          globalScope['FontInspector'].enabled) {
        globalScope['FontInspector'].fontAdded(this, url);
      }

return rule;
    },

getPathGenerator:
        function FontFaceObject_getPathGenerator(objs, character) {
      if (!(character in this.compiledGlyphs)) {
        var cmds = objs.get(this.loadedName + '_path_' + character);
        var current, i, len;

// If we can, compile cmds into JS for MAXIMUM SPEED
        if (FontFaceObject.isEvalSupported) {
          var args, js = '';
          for (i = 0, len = cmds.length; i < len; i++) {
            current = cmds[i];

if (current.args !== undefined) {
              args = current.args.join(',');
            } else {
              args = '';
            }

js += 'c.' + current.cmd + '(' + args + ');\n';
          }
          /* jshint -W054 */
          this.compiledGlyphs[character] = new Function('c', 'size', js);
        } else {
          // But fall back on using Function.prototype.apply() if we're
          // blocked from using eval() for whatever reason (like CSP policies)
          this.compiledGlyphs[character] = function(c, size) {
            for (i = 0, len = cmds.length; i < len; i++) {
              current = cmds[i];

if (current.cmd === 'scale') {
                current.args = [size, -size];
              }

c[current.cmd].apply(c, current.args);
            }
          };
        }
      }
      return this.compiledGlyphs[character];
    }
  };
  return FontFaceObject;
})();

exports.FontFaceObject = FontFaceObject;
exports.FontLoader = FontLoader;
}));

(function (root, factory) {
  {
    factory((root.pdfjsDisplayMetadata = {}), root.pdfjsSharedUtil);
  }
}(this, function (exports, sharedUtil) {

var error = sharedUtil.error;

function Metadata(meta) {
    if (typeof meta === 'string') {
      // Ghostscript produces invalid metadata
      meta = fixMetadata(meta);

var parser = new DOMParser();
      meta = parser.parseFromString(meta, 'application/xml');
    } else if (!(meta instanceof Document)) {
      error('Metadata: Invalid metadata object');
    }

this.metaDocument = meta;
    this.metadata = {};
    this.parse();
  }

Metadata.prototype = {
    parse: function Metadata_parse() {
      var doc = this.metaDocument;
      var rdf = doc.documentElement;

if (rdf.nodeName.toLowerCase() !== 'rdf:rdf') { // Wrapped in <xmpmeta>
        rdf = rdf.firstChild;
        while (rdf && rdf.nodeName.toLowerCase() !== 'rdf:rdf') {
          rdf = rdf.nextSibling;
        }
      }

var nodeName = (rdf) ? rdf.nodeName.toLowerCase() : null;
      if (!rdf || nodeName !== 'rdf:rdf' || !rdf.hasChildNodes()) {
        return;
      }

var children = rdf.childNodes, desc, entry, name, i, ii, length, iLength;
      for (i = 0, length = children.length; i < length; i++) {
        desc = children[i];
        if (desc.nodeName.toLowerCase() !== 'rdf:description') {
          continue;
        }

for (ii = 0, iLength = desc.childNodes.length; ii < iLength; ii++) {
          if (desc.childNodes[ii].nodeName.toLowerCase() !== '#text') {
            entry = desc.childNodes[ii];
            name = entry.nodeName.toLowerCase();
            this.metadata[name] = entry.textContent.trim();
          }
        }
      }
    },

get: function Metadata_get(name) {
      return this.metadata[name] || null;
    },

has: function Metadata_has(name) {
      return typeof this.metadata[name] !== 'undefined';
    }
  };

return Metadata;
})();

exports.Metadata = Metadata;
}));

(function (root, factory) {
  {
    factory((root.pdfjsDisplaySVG = {}), root.pdfjsSharedUtil);
  }
}(this, function (exports, sharedUtil) {

var SVG_DEFAULTS = {
  fontStyle: 'normal',
  fontWeight: 'normal',
  fillColor: '#000000'
};

var convertImgDataToPng = (function convertImgDataToPngClosure() {
  var PNG_HEADER =
    new Uint8Array([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]);

var CHUNK_WRAPPER_SIZE = 12;

function crc32(data, start, end) {
    var crc = -1;
    for (var i = start; i < end; i++) {
      var a = (crc ^ data[i]) & 0xff;
      var b = crcTable[a];
      crc = (crc >>> 8) ^ b;
    }
    return crc ^ -1;
  }

function writePngChunk(type, body, data, offset) {
    var p = offset;
    var len = body.length;

data[p] = len >> 24 & 0xff;
    data[p + 1] = len >> 16 & 0xff;
    data[p + 2] = len >> 8 & 0xff;
    data[p + 3] = len & 0xff;
    p += 4;

data[p] = type.charCodeAt(0) & 0xff;
    data[p + 1] = type.charCodeAt(1) & 0xff;
    data[p + 2] = type.charCodeAt(2) & 0xff;
    data[p + 3] = type.charCodeAt(3) & 0xff;
    p += 4;

data.set(body, p);
    p += body.length;

var crc = crc32(data, offset + 4, p);

data[p] = crc >> 24 & 0xff;
    data[p + 1] = crc >> 16 & 0xff;
    data[p + 2] = crc >> 8 & 0xff;
    data[p + 3] = crc & 0xff;
  }

function adler32(data, start, end) {
    var a = 1;
    var b = 0;
    for (var i = start; i < end; ++i) {
      a = (a + (data[i] & 0xff)) % 65521;
      b = (b + a) % 65521;
    }
    return (b << 16) | a;
  }

function encode(imgData, kind) {
    var width = imgData.width;
    var height = imgData.height;
    var bitDepth, colorType, lineSize;
    var bytes = imgData.data;

switch (kind) {
      case ImageKind.GRAYSCALE_1BPP:
        colorType = 0;
        bitDepth = 1;
        lineSize = (width + 7) >> 3;
        break;
      case ImageKind.RGB_24BPP:
        colorType = 2;
        bitDepth = 8;
        lineSize = width * 3;
        break;
      case ImageKind.RGBA_32BPP:
        colorType = 6;
        bitDepth = 8;
        lineSize = width * 4;
        break;
      default:
        throw new Error('invalid format');
    }

// prefix every row with predictor 0
    var literals = new Uint8Array((1 + lineSize) * height);
    var offsetLiterals = 0, offsetBytes = 0;
    var y, i;
    for (y = 0; y < height; ++y) {
      literals[offsetLiterals++] = 0; // no prediction
      literals.set(bytes.subarray(offsetBytes, offsetBytes + lineSize),
                   offsetLiterals);
      offsetBytes += lineSize;
      offsetLiterals += lineSize;
    }

if (kind === ImageKind.GRAYSCALE_1BPP) {
      // inverting for B/W
      offsetLiterals = 0;
      for (y = 0; y < height; y++) {
        offsetLiterals++; // skipping predictor
        for (i = 0; i < lineSize; i++) {
          literals[offsetLiterals++] ^= 0xFF;
        }
      }
    }

var ihdr = new Uint8Array([
      width >> 24 & 0xff,
      width >> 16 & 0xff,
      width >> 8 & 0xff,
      width & 0xff,
      height >> 24 & 0xff,
      height >> 16 & 0xff,
      height >> 8 & 0xff,
      height & 0xff,
      bitDepth, // bit depth
      colorType, // color type
      0x00, // compression method
      0x00, // filter method
      0x00 // interlace method
    ]);

var len = literals.length;
    var maxBlockLength = 0xFFFF;

var deflateBlocks = Math.ceil(len / maxBlockLength);
    var idat = new Uint8Array(2 + len + deflateBlocks * 5 + 4);
    var pi = 0;
    idat[pi++] = 0x78; // compression method and flags
    idat[pi++] = 0x9c; // flags

var pos = 0;
    while (len > maxBlockLength) {
      // writing non-final DEFLATE blocks type 0 and length of 65535
      idat[pi++] = 0x00;
      idat[pi++] = 0xff;
      idat[pi++] = 0xff;
      idat[pi++] = 0x00;
      idat[pi++] = 0x00;
      idat.set(literals.subarray(pos, pos + maxBlockLength), pi);
      pi += maxBlockLength;
      pos += maxBlockLength;
      len -= maxBlockLength;
    }

// writing non-final DEFLATE blocks type 0
    idat[pi++] = 0x01;
    idat[pi++] = len & 0xff;
    idat[pi++] = len >> 8 & 0xff;
    idat[pi++] = (~len & 0xffff) & 0xff;
    idat[pi++] = (~len & 0xffff) >> 8 & 0xff;
    idat.set(literals.subarray(pos), pi);
    pi += literals.length - pos;

var adler = adler32(literals, 0, literals.length); // checksum
    idat[pi++] = adler >> 24 & 0xff;
    idat[pi++] = adler >> 16 & 0xff;
    idat[pi++] = adler >> 8 & 0xff;
    idat[pi++] = adler & 0xff;

// PNG will consists: header, IHDR+data, IDAT+data, and IEND.
    var pngLength = PNG_HEADER.length + (CHUNK_WRAPPER_SIZE * 3) +
                    ihdr.length + idat.length;
    var data = new Uint8Array(pngLength);
    var offset = 0;
    data.set(PNG_HEADER, offset);
    offset += PNG_HEADER.length;
    writePngChunk('IHDR', ihdr, data, offset);
    offset += CHUNK_WRAPPER_SIZE + ihdr.length;
    writePngChunk('IDATA', idat, data, offset);
    offset += CHUNK_WRAPPER_SIZE + idat.length;
    writePngChunk('IEND', new Uint8Array(0), data, offset);

return PDFJS.createObjectURL(data, 'image/png');
  }

return function convertImgDataToPng(imgData) {
    var kind = (imgData.kind === undefined ?
                ImageKind.GRAYSCALE_1BPP : imgData.kind);
    return encode(imgData, kind);
  };
})();

var SVGExtraState = (function SVGExtraStateClosure() {
  function SVGExtraState() {
    this.fontSizeScale = 1;
    this.fontWeight = SVG_DEFAULTS.fontWeight;
    this.fontSize = 0;

this.textMatrix = IDENTITY_MATRIX;
    this.fontMatrix = FONT_IDENTITY_MATRIX;
    this.leading = 0;

// Current point (in user coordinates)
    this.x = 0;
    this.y = 0;

// Start of text line (in text coordinates)
    this.lineX = 0;
    this.lineY = 0;

// Character and word spacing
    this.charSpacing = 0;
    this.wordSpacing = 0;
    this.textHScale = 1;
    this.textRise = 0;

// Default foreground and background colors
    this.fillColor = SVG_DEFAULTS.fillColor;
    this.strokeColor = '#000000';

this.fillAlpha = 1;
    this.strokeAlpha = 1;
    this.lineWidth = 1;
    this.lineJoin = '';
    this.lineCap = '';
    this.miterLimit = 0;

this.dashArray = [];
    this.dashPhase = 0;

this.dependencies = [];

// Clipping
    this.clipId = '';
    this.pendingClip = false;

this.maskId = '';
  }

SVGExtraState.prototype = {
    clone: function SVGExtraState_clone() {
      return Object.create(this);
    },
    setCurrentPoint: function SVGExtraState_setCurrentPoint(x, y) {
      this.x = x;
      this.y = y;
    }
  };
  return SVGExtraState;
})();

var SVGGraphics = (function SVGGraphicsClosure() {
  function createScratchSVG(width, height) {
    var NS = 'http://www.w3.org/2000/svg';
    var svg = document.createElementNS(NS, 'svg:svg');
    svg.setAttributeNS(null, 'version', '1.1');
    svg.setAttributeNS(null, 'width', width + 'px');
    svg.setAttributeNS(null, 'height', height + 'px');
    svg.setAttributeNS(null, 'viewBox', '0 0 ' + width + ' ' + height);
    return svg;
  }

function opListToTree(opList) {
    var opTree = [];
    var tmp = [];
    var opListLen = opList.length;

for (var x = 0; x < opListLen; x++) {
      if (opList[x].fn === 'save') {
        opTree.push({'fnId': 92, 'fn': 'group', 'items': []});
        tmp.push(opTree);
        opTree = opTree[opTree.length - 1].items;
        continue;
      }

if(opList[x].fn === 'restore') {
        opTree = tmp.pop();
      } else {
        opTree.push(opList[x]);
      }
    }
    return opTree;
  }

/**
   * Formats float number.
   * @param value {number} number to format.
   * @returns {string}
   */
  function pf(value) {
    if (value === (value | 0)) { // integer number
      return value.toString();
    }
    var s = value.toFixed(10);
    var i = s.length - 1;
    if (s[i] !== '0') {
      return s;
    }
    // removing trailing zeros
    do {
      i--;
    } while (s[i] === '0');
    return s.substr(0, s[i] === '.' ? i : i + 1);
  }

/**
   * Formats transform matrix. The standard rotation, scale and translate
   * matrices are replaced by their shorter forms, and for identity matrix
   * returns empty string to save the memory.
   * @param m {Array} matrix to format.
   * @returns {string}
   */
  function pm(m) {
    if (m[4] === 0 && m[5] === 0) {
      if (m[1] === 0 && m[2] === 0) {
        if (m[0] === 1 && m[3] === 1) {
          return '';
        }
        return 'scale(' + pf(m[0]) + ' ' + pf(m[3]) + ')';
      }
      if (m[0] === m[3] && m[1] === -m[2]) {
        var a = Math.acos(m[0]) * 180 / Math.PI;
        return 'rotate(' + pf(a) + ')';
      }
    } else {
      if (m[0] === 1 && m[1] === 0 && m[2] === 0 && m[3] === 1) {
        return 'translate(' + pf(m[4]) + ' ' + pf(m[5]) + ')';
      }
    }
    return 'matrix(' + pf(m[0]) + ' ' + pf(m[1]) + ' ' + pf(m[2]) + ' ' +
      pf(m[3]) + ' ' + pf(m[4]) + ' ' + pf(m[5]) + ')';
  }

function SVGGraphics(commonObjs, objs) {
    this.current = new SVGExtraState();
    this.transformMatrix = IDENTITY_MATRIX; // Graphics state matrix
    this.transformStack = [];
    this.extraStack = [];
    this.commonObjs = commonObjs;
    this.objs = objs;
    this.pendingEOFill = false;

this.embedFonts = false;
    this.embeddedFonts = {};
    this.cssStyle = null;
  }

var NS = 'http://www.w3.org/2000/svg';
  var XML_NS = 'http://www.w3.org/XML/1998/namespace';
  var XLINK_NS = 'http://www.w3.org/1999/xlink';
  var LINE_CAP_STYLES = ['butt', 'round', 'square'];
  var LINE_JOIN_STYLES = ['miter', 'round', 'bevel'];
  var clipCount = 0;
  var maskCount = 0;

SVGGraphics.prototype = {
    save: function SVGGraphics_save() {
      this.transformStack.push(this.transformMatrix);
      var old = this.current;
      this.extraStack.push(old);
      this.current = old.clone();
    },

restore: function SVGGraphics_restore() {
      this.transformMatrix = this.transformStack.pop();
      this.current = this.extraStack.pop();

this.tgrp = document.createElementNS(NS, 'svg:g');
      this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
      this.pgrp.appendChild(this.tgrp);
    },

group: function SVGGraphics_group(items) {
      this.save();
      this.executeOpTree(items);
      this.restore();
    },

loadDependencies: function SVGGraphics_loadDependencies(operatorList) {
      var fnArray = operatorList.fnArray;
      var fnArrayLen = fnArray.length;
      var argsArray = operatorList.argsArray;

transform: function SVGGraphics_transform(a, b, c, d, e, f) {
      var transformMatrix = [a, b, c, d, e, f];
      this.transformMatrix = PDFJS.Util.transform(this.transformMatrix,
                                                  transformMatrix);

this.tgrp = document.createElementNS(NS, 'svg:g');
      this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
    },

getSVG: function SVGGraphics_getSVG(operatorList, viewport) {
      this.svg = createScratchSVG(viewport.width, viewport.height);
      this.viewport = viewport;

return this.loadDependencies(operatorList).then(function () {
        this.transformMatrix = IDENTITY_MATRIX;
        this.pgrp = document.createElementNS(NS, 'svg:g'); // Parent group
        this.pgrp.setAttributeNS(null, 'transform', pm(viewport.transform));
        this.tgrp = document.createElementNS(NS, 'svg:g'); // Transform group
        this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
        this.defs = document.createElementNS(NS, 'svg:defs');
        this.pgrp.appendChild(this.defs);
        this.pgrp.appendChild(this.tgrp);
        this.svg.appendChild(this.pgrp);
        var opTree = this.convertOpList(operatorList);
        this.executeOpTree(opTree);
        return this.svg;
      }.bind(this));
    },

convertOpList: function SVGGraphics_convertOpList(operatorList) {
      var argsArray = operatorList.argsArray;
      var fnArray = operatorList.fnArray;
      var fnArrayLen  = fnArray.length;
      var REVOPS = [];
      var opList = [];

for (var op in OPS) {
        REVOPS[OPS[op]] = op;
      }

for (var x = 0; x < fnArrayLen; x++) {
        var fnId = fnArray[x];
        opList.push({'fnId' : fnId, 'fn': REVOPS[fnId], 'args': argsArray[x]});
      }
      return opListToTree(opList);
    },

executeOpTree: function SVGGraphics_executeOpTree(opTree) {
      var opTreeLen = opTree.length;
      for(var x = 0; x < opTreeLen; x++) {
        var fn = opTree[x].fn;
        var fnId = opTree[x].fnId;
        var args = opTree[x].args;

switch (fnId | 0) {
          case OPS.beginText:
            this.beginText();
            break;
          case OPS.setLeading:
            this.setLeading(args);
            break;
          case OPS.setLeadingMoveText:
            this.setLeadingMoveText(args[0], args[1]);
            break;
          case OPS.setFont:
            this.setFont(args);
            break;
          case OPS.showText:
            this.showText(args[0]);
            break;
          case OPS.showSpacedText:
            this.showText(args[0]);
            break;
          case OPS.endText:
            this.endText();
            break;
          case OPS.moveText:
            this.moveText(args[0], args[1]);
            break;
          case OPS.setCharSpacing:
            this.setCharSpacing(args[0]);
            break;
          case OPS.setWordSpacing:
            this.setWordSpacing(args[0]);
            break;
          case OPS.setHScale:
            this.setHScale(args[0]);
            break;
          case OPS.setTextMatrix:
            this.setTextMatrix(args[0], args[1], args[2],
                               args[3], args[4], args[5]);
            break;
          case OPS.setLineWidth:
            this.setLineWidth(args[0]);
            break;
          case OPS.setLineJoin:
            this.setLineJoin(args[0]);
            break;
          case OPS.setLineCap:
            this.setLineCap(args[0]);
            break;
          case OPS.setMiterLimit:
            this.setMiterLimit(args[0]);
            break;
          case OPS.setFillRGBColor:
            this.setFillRGBColor(args[0], args[1], args[2]);
            break;
          case OPS.setStrokeRGBColor:
            this.setStrokeRGBColor(args[0], args[1], args[2]);
            break;
          case OPS.setDash:
            this.setDash(args[0], args[1]);
            break;
          case OPS.setGState:
            this.setGState(args[0]);
            break;
          case OPS.fill:
            this.fill();
            break;
          case OPS.eoFill:
            this.eoFill();
            break;
          case OPS.stroke:
            this.stroke();
            break;
          case OPS.fillStroke:
            this.fillStroke();
            break;
          case OPS.eoFillStroke:
            this.eoFillStroke();
            break;
          case OPS.clip:
            this.clip('nonzero');
            break;
          case OPS.eoClip:
            this.clip('evenodd');
            break;
          case OPS.paintSolidColorImageMask:
            this.paintSolidColorImageMask();
            break;
          case OPS.paintJpegXObject:
            this.paintJpegXObject(args[0], args[1], args[2]);
            break;
          case OPS.paintImageXObject:
            this.paintImageXObject(args[0]);
            break;
          case OPS.paintInlineImageXObject:
            this.paintInlineImageXObject(args[0]);
            break;
          case OPS.paintImageMaskXObject:
            this.paintImageMaskXObject(args[0]);
            break;
          case OPS.paintFormXObjectBegin:
            this.paintFormXObjectBegin(args[0], args[1]);
            break;
          case OPS.paintFormXObjectEnd:
            this.paintFormXObjectEnd();
            break;
          case OPS.closePath:
            this.closePath();
            break;
          case OPS.closeStroke:
            this.closeStroke();
            break;
          case OPS.closeFillStroke:
            this.closeFillStroke();
            break;
          case OPS.nextLine:
            this.nextLine();
            break;
          case OPS.transform:
            this.transform(args[0], args[1], args[2], args[3],
                           args[4], args[5]);
            break;
          case OPS.constructPath:
            this.constructPath(args[0], args[1]);
            break;
          case OPS.endPath:
            this.endPath();
            break;
          case 92:
            this.group(opTree[x].items);
            break;
          default:
            warn('Unimplemented method '+ fn);
            break;
        }
      }
    },

setWordSpacing: function SVGGraphics_setWordSpacing(wordSpacing) {
      this.current.wordSpacing = wordSpacing;
    },

setCharSpacing: function SVGGraphics_setCharSpacing(charSpacing) {
      this.current.charSpacing = charSpacing;
    },

nextLine: function SVGGraphics_nextLine() {
      this.moveText(0, this.current.leading);
    },

setTextMatrix: function SVGGraphics_setTextMatrix(a, b, c, d, e, f) {
      var current = this.current;
      this.current.textMatrix = this.current.lineMatrix = [a, b, c, d, e, f];

this.current.x = this.current.lineX = 0;
      this.current.y = this.current.lineY = 0;

current.xcoords = [];
      current.tspan = document.createElementNS(NS, 'svg:tspan');
      current.tspan.setAttributeNS(null, 'font-family', current.fontFamily);
      current.tspan.setAttributeNS(null, 'font-size',
                                   pf(current.fontSize) + 'px');
      current.tspan.setAttributeNS(null, 'y', pf(-current.y));

current.txtElement = document.createElementNS(NS, 'svg:text');
      current.txtElement.appendChild(current.tspan);
    },

beginText: function SVGGraphics_beginText() {
      this.current.x = this.current.lineX = 0;
      this.current.y = this.current.lineY = 0;
      this.current.textMatrix = IDENTITY_MATRIX;
      this.current.lineMatrix = IDENTITY_MATRIX;
      this.current.tspan = document.createElementNS(NS, 'svg:tspan');
      this.current.txtElement = document.createElementNS(NS, 'svg:text');
      this.current.txtgrp = document.createElementNS(NS, 'svg:g');
      this.current.xcoords = [];
    },

moveText: function SVGGraphics_moveText(x, y) {
      var current = this.current;
      this.current.x = this.current.lineX += x;
      this.current.y = this.current.lineY += y;

showText: function SVGGraphics_showText(glyphs) {
      var current = this.current;
      var font = current.font;
      var fontSize = current.fontSize;

if (fontSize === 0) {
        return;
      }

var charSpacing = current.charSpacing;
      var wordSpacing = current.wordSpacing;
      var fontDirection = current.fontDirection;
      var textHScale = current.textHScale * fontDirection;
      var glyphsLength = glyphs.length;
      var vertical = font.vertical;
      var widthAdvanceScale = fontSize * current.fontMatrix[0];

var x = 0, i;
      for (i = 0; i < glyphsLength; ++i) {
        var glyph = glyphs[i];
        if (glyph === null) {
          // word break
          x += fontDirection * wordSpacing;
          continue;
        } else if (isNum(glyph)) {
          x += -glyph * fontSize * 0.001;
          continue;
        }
        current.xcoords.push(current.x + x * textHScale);

var width = glyph.width;
        var character = glyph.fontChar;
        var charWidth = width * widthAdvanceScale + charSpacing * fontDirection;
        x += charWidth;

current.tspan.textContent += character;
      }
      if (vertical) {
        current.y -= x * textHScale;
      } else {
        current.x += x * textHScale;
      }

current.tspan.setAttributeNS(null, 'x',
                                   current.xcoords.map(pf).join(' '));
      current.tspan.setAttributeNS(null, 'y', pf(-current.y));
      current.tspan.setAttributeNS(null, 'font-family', current.fontFamily);
      current.tspan.setAttributeNS(null, 'font-size',
                                   pf(current.fontSize) + 'px');
      if (current.fontStyle !== SVG_DEFAULTS.fontStyle) {
        current.tspan.setAttributeNS(null, 'font-style', current.fontStyle);
      }
      if (current.fontWeight !== SVG_DEFAULTS.fontWeight) {
        current.tspan.setAttributeNS(null, 'font-weight', current.fontWeight);
      }
      if (current.fillColor !== SVG_DEFAULTS.fillColor) {
        current.tspan.setAttributeNS(null, 'fill', current.fillColor);
      }

current.txtElement.setAttributeNS(null, 'transform',
                                        pm(current.textMatrix) +
                                        ' scale(1, -1)' );
      current.txtElement.setAttributeNS(XML_NS, 'xml:space', 'preserve');
      current.txtElement.appendChild(current.tspan);
      current.txtgrp.appendChild(current.txtElement);

this.tgrp.appendChild(current.txtElement);

setLeadingMoveText: function SVGGraphics_setLeadingMoveText(x, y) {
      this.setLeading(-y);
      this.moveText(x, y);
    },

addFontStyle: function SVGGraphics_addFontStyle(fontObj) {
      if (!this.cssStyle) {
        this.cssStyle = document.createElementNS(NS, 'svg:style');
        this.cssStyle.setAttributeNS(null, 'type', 'text/css');
        this.defs.appendChild(this.cssStyle);
      }

var url = PDFJS.createObjectURL(fontObj.data, fontObj.mimetype);
      this.cssStyle.textContent +=
        '@font-face { font-family: "' + fontObj.loadedName + '";' +
        ' src: url(' + url + '); }\n';
    },

setFont: function SVGGraphics_setFont(details) {
      var current = this.current;
      var fontObj = this.commonObjs.get(details[0]);
      var size = details[1];
      this.current.font = fontObj;

if (this.embedFonts && fontObj.data &&
          !this.embeddedFonts[fontObj.loadedName]) {
        this.addFontStyle(fontObj);
        this.embeddedFonts[fontObj.loadedName] = fontObj;
      }

current.fontMatrix = (fontObj.fontMatrix ?
                            fontObj.fontMatrix : FONT_IDENTITY_MATRIX);

var bold = fontObj.black ? (fontObj.bold ? 'bolder' : 'bold') :
                                 (fontObj.bold ? 'bold' : 'normal');
      var italic = fontObj.italic ? 'italic' : 'normal';

if (size < 0) {
        size = -size;
        current.fontDirection = -1;
      } else {
        current.fontDirection = 1;
      }
      current.fontSize = size;
      current.fontFamily = fontObj.loadedName;
      current.fontWeight = bold;
      current.fontStyle = italic;

current.tspan = document.createElementNS(NS, 'svg:tspan');
      current.tspan.setAttributeNS(null, 'y', pf(-current.y));
      current.xcoords = [];
    },

endText: function SVGGraphics_endText() {
      if (this.current.pendingClip) {
        this.cgrp.appendChild(this.tgrp);
        this.pgrp.appendChild(this.cgrp);
      } else {
        this.pgrp.appendChild(this.tgrp);
      }
      this.tgrp = document.createElementNS(NS, 'svg:g');
      this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
    },

// Path properties
    setLineWidth: function SVGGraphics_setLineWidth(width) {
      this.current.lineWidth = width;
    },
    setLineCap: function SVGGraphics_setLineCap(style) {
      this.current.lineCap = LINE_CAP_STYLES[style];
    },
    setLineJoin: function SVGGraphics_setLineJoin(style) {
      this.current.lineJoin = LINE_JOIN_STYLES[style];
    },
    setMiterLimit: function SVGGraphics_setMiterLimit(limit) {
      this.current.miterLimit = limit;
    },
    setStrokeRGBColor: function SVGGraphics_setStrokeRGBColor(r, g, b) {
      var color = Util.makeCssRgb(r, g, b);
      this.current.strokeColor = color;
    },
    setFillRGBColor: function SVGGraphics_setFillRGBColor(r, g, b) {
      var color = Util.makeCssRgb(r, g, b);
      this.current.fillColor = color;
      this.current.tspan = document.createElementNS(NS, 'svg:tspan');
      this.current.xcoords = [];
    },
    setDash: function SVGGraphics_setDash(dashArray, dashPhase) {
      this.current.dashArray = dashArray;
      this.current.dashPhase = dashPhase;
    },

constructPath: function SVGGraphics_constructPath(ops, args) {
      var current = this.current;
      var x = current.x, y = current.y;
      current.path = document.createElementNS(NS, 'svg:path');
      var d = [];
      var opLength = ops.length;

for (var i = 0, j = 0; i < opLength; i++) {
        switch (ops[i] | 0) {
          case OPS.rectangle:
            x = args[j++];
            y = args[j++];
            var width = args[j++];
            var height = args[j++];
            var xw = x + width;
            var yh = y + height;
            d.push('M', pf(x), pf(y), 'L', pf(xw) , pf(y), 'L', pf(xw), pf(yh),
                   'L', pf(x), pf(yh), 'Z');
            break;
          case OPS.moveTo:
            x = args[j++];
            y = args[j++];
            d.push('M', pf(x), pf(y));
            break;
          case OPS.lineTo:
            x = args[j++];
            y = args[j++];
            d.push('L', pf(x) , pf(y));
            break;
          case OPS.curveTo:
            x = args[j + 4];
            y = args[j + 5];
            d.push('C', pf(args[j]), pf(args[j + 1]), pf(args[j + 2]),
                   pf(args[j + 3]), pf(x), pf(y));
            j += 6;
            break;
          case OPS.curveTo2:
            x = args[j + 2];
            y = args[j + 3];
            d.push('C', pf(x), pf(y), pf(args[j]), pf(args[j + 1]),
                   pf(args[j + 2]), pf(args[j + 3]));
            j += 4;
            break;
          case OPS.curveTo3:
            x = args[j + 2];
            y = args[j + 3];
            d.push('C', pf(args[j]), pf(args[j + 1]), pf(x), pf(y),
                   pf(x), pf(y));
            j += 4;
            break;
          case OPS.closePath:
            d.push('Z');
            break;
        }
      }
      current.path.setAttributeNS(null, 'd', d.join(' '));
      current.path.setAttributeNS(null, 'stroke-miterlimit',
                                  pf(current.miterLimit));
      current.path.setAttributeNS(null, 'stroke-linecap', current.lineCap);
      current.path.setAttributeNS(null, 'stroke-linejoin', current.lineJoin);
      current.path.setAttributeNS(null, 'stroke-width',
                                  pf(current.lineWidth) + 'px');
      current.path.setAttributeNS(null, 'stroke-dasharray',
                                  current.dashArray.map(pf).join(' '));
      current.path.setAttributeNS(null, 'stroke-dashoffset',
                                  pf(current.dashPhase) + 'px');
      current.path.setAttributeNS(null, 'fill', 'none');

this.tgrp.appendChild(current.path);
      if (current.pendingClip) {
        this.cgrp.appendChild(this.tgrp);
        this.pgrp.appendChild(this.cgrp);
      } else {
        this.pgrp.appendChild(this.tgrp);
      }
      // Saving a reference in current.element so that it can be addressed
      // in 'fill' and 'stroke'
      current.element = current.path;
      current.setCurrentPoint(x, y);
    },

endPath: function SVGGraphics_endPath() {
      var current = this.current;
      if (current.pendingClip) {
        this.cgrp.appendChild(this.tgrp);
        this.pgrp.appendChild(this.cgrp);
      } else {
        this.pgrp.appendChild(this.tgrp);
      }
      this.tgrp = document.createElementNS(NS, 'svg:g');
      this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix));
    },

clip: function SVGGraphics_clip(type) {
      var current = this.current;
      // Add current path to clipping path
      current.clipId = 'clippath' + clipCount;
      clipCount++;
      this.clippath = document.createElementNS(NS, 'svg:clipPath');
      this.clippath.setAttributeNS(null, 'id', current.clipId);
      var clipElement = current.element.cloneNode();
      if (type === 'evenodd') {
        clipElement.setAttributeNS(null, 'clip-rule', 'evenodd');
      } else {
        clipElement.setAttributeNS(null, 'clip-rule', 'nonzero');
      }
      this.clippath.setAttributeNS(null, 'transform', pm(this.transformMatrix));
      this.clippath.appendChild(clipElement);
      this.defs.appendChild(this.clippath);

// Create a new group with that attribute
      current.pendingClip = true;
      this.cgrp = document.createElementNS(NS, 'svg:g');
      this.cgrp.setAttributeNS(null, 'clip-path',
                               'url(#' + current.clipId + ')');
      this.pgrp.appendChild(this.cgrp);
    },

closePath: function SVGGraphics_closePath() {
      var current = this.current;
      var d = current.path.getAttributeNS(null, 'd');
      d += 'Z';
      current.path.setAttributeNS(null, 'd', d);
    },

setLeading: function SVGGraphics_setLeading(leading) {
      this.current.leading = -leading;
    },

setTextRise: function SVGGraphics_setTextRise(textRise) {
      this.current.textRise = textRise;
    },

setHScale: function SVGGraphics_setHScale(scale) {
      this.current.textHScale = scale / 100;
    },

setGState: function SVGGraphics_setGState(states) {
      for (var i = 0, ii = states.length; i < ii; i++) {
        var state = states[i];
        var key = state[0];
        var value = state[1];

fill: function SVGGraphics_fill() {
      var current = this.current;
      current.element.setAttributeNS(null, 'fill', current.fillColor);
    },

stroke: function SVGGraphics_stroke() {
      var current = this.current;
      current.element.setAttributeNS(null, 'stroke', current.strokeColor);
      current.element.setAttributeNS(null, 'fill', 'none');
    },

eoFill: function SVGGraphics_eoFill() {
      var current = this.current;
      current.element.setAttributeNS(null, 'fill', current.fillColor);
      current.element.setAttributeNS(null, 'fill-rule', 'evenodd');
    },

fillStroke: function SVGGraphics_fillStroke() {
      // Order is important since stroke wants fill to be none.
      // First stroke, then if fill needed, it will be overwritten.
      this.stroke();
      this.fill();
    },

eoFillStroke: function SVGGraphics_eoFillStroke() {
      this.current.element.setAttributeNS(null, 'fill-rule', 'evenodd');
      this.fillStroke();
    },

closeStroke: function SVGGraphics_closeStroke() {
      this.closePath();
      this.stroke();
    },

closeFillStroke: function SVGGraphics_closeFillStroke() {
      this.closePath();
      this.fillStroke();
    },

paintSolidColorImageMask:
        function SVGGraphics_paintSolidColorImageMask() {
      var current = this.current;
      var rect = document.createElementNS(NS, 'svg:rect');
      rect.setAttributeNS(null, 'x', '0');
      rect.setAttributeNS(null, 'y', '0');
      rect.setAttributeNS(null, 'width', '1px');
      rect.setAttributeNS(null, 'height', '1px');
      rect.setAttributeNS(null, 'fill', current.fillColor);
      this.tgrp.appendChild(rect);
    },

paintJpegXObject: function SVGGraphics_paintJpegXObject(objId, w, h) {
      var current = this.current;
      var imgObj = this.objs.get(objId);
      var imgEl = document.createElementNS(NS, 'svg:image');
      imgEl.setAttributeNS(XLINK_NS, 'xlink:href', imgObj.src);
      imgEl.setAttributeNS(null, 'width', imgObj.width + 'px');
      imgEl.setAttributeNS(null, 'height', imgObj.height + 'px');
      imgEl.setAttributeNS(null, 'x', '0');
      imgEl.setAttributeNS(null, 'y', pf(-h));
      imgEl.setAttributeNS(null, 'transform',
                           'scale(' + pf(1 / w) + ' ' + pf(-1 / h) + ')');

this.tgrp.appendChild(imgEl);
      if (current.pendingClip) {
        this.cgrp.appendChild(this.tgrp);
        this.pgrp.appendChild(this.cgrp);
      } else {
        this.pgrp.appendChild(this.tgrp);
      }
    },

paintImageXObject: function SVGGraphics_paintImageXObject(objId) {
      var imgData = this.objs.get(objId);
      if (!imgData) {
        warn('Dependent image isn\'t ready yet');
        return;
      }
      this.paintInlineImageXObject(imgData);
    },

paintInlineImageXObject:
        function SVGGraphics_paintInlineImageXObject(imgData, mask) {
      var current = this.current;
      var width = imgData.width;
      var height = imgData.height;

paintImageMaskXObject:
        function SVGGraphics_paintImageMaskXObject(imgData) {
      var current = this.current;
      var width = imgData.width;
      var height = imgData.height;
      var fillColor = current.fillColor;

current.maskId = 'mask' + maskCount++;
      var mask = document.createElementNS(NS, 'svg:mask');
      mask.setAttributeNS(null, 'id', current.maskId);

var rect = document.createElementNS(NS, 'svg:rect');
      rect.setAttributeNS(null, 'x', '0');
      rect.setAttributeNS(null, 'y', '0');
      rect.setAttributeNS(null, 'width', pf(width));
      rect.setAttributeNS(null, 'height', pf(height));
      rect.setAttributeNS(null, 'fill', fillColor);
      rect.setAttributeNS(null, 'mask', 'url(#' + current.maskId +')');
      this.defs.appendChild(mask);
      this.tgrp.appendChild(rect);

this.paintInlineImageXObject(imgData, mask);
    },

paintFormXObjectBegin:
        function SVGGraphics_paintFormXObjectBegin(matrix, bbox) {
      this.save();

if (isArray(matrix) && matrix.length === 6) {
        this.transform(matrix[0], matrix[1], matrix[2],
                       matrix[3], matrix[4], matrix[5]);
      }

if (isArray(bbox) && bbox.length === 4) {
        var width = bbox[2] - bbox[0];
        var height = bbox[3] - bbox[1];

var cliprect = document.createElementNS(NS, 'svg:rect');
        cliprect.setAttributeNS(null, 'x', bbox[0]);
        cliprect.setAttributeNS(null, 'y', bbox[1]);
        cliprect.setAttributeNS(null, 'width', pf(width));
        cliprect.setAttributeNS(null, 'height', pf(height));
        this.current.element = cliprect;
        this.clip('nonzero');
        this.endPath();
      }
    },

paintFormXObjectEnd:
        function SVGGraphics_paintFormXObjectEnd() {
      this.restore();
    }
  };
  return SVGGraphics;
})();

PDFJS.SVGGraphics = SVGGraphics;

exports.SVGGraphics = SVGGraphics;
}));

(function (root, factory) {
  {
    factory((root.pdfjsDisplayTextLayer = {}), root.pdfjsSharedUtil,
      root.pdfjsDisplayDOMUtils, root.pdfjsSharedGlobal);
  }
}(this, function (exports, sharedUtil, displayDOMUtils, sharedGlobal) {

var Util = sharedUtil.Util;
var createPromiseCapability = sharedUtil.createPromiseCapability;
var CustomStyle = displayDOMUtils.CustomStyle;
var PDFJS = sharedGlobal.PDFJS;

/**
 * Text layer render parameters.
 *
 * @typedef {Object} TextLayerRenderParameters
 * @property {TextContent} textContent - Text content to render (the object is
 *   returned by the page's getTextContent() method).
 * @property {HTMLElement} container - HTML element that will contain text runs.
 * @property {PDFJS.PageViewport} viewport - The target viewport to properly
 *   layout the text runs.
 * @property {Array} textDivs - (optional) HTML elements that are correspond
 *   the text items of the textContent input. This is output and shall be
 *   initially be set to empty array.
 * @property {number} timeout - (optional) Delay in milliseconds before
 *   rendering of the text  runs occurs.
 */
var renderTextLayer = (function renderTextLayerClosure() {
  var MAX_TEXT_DIVS_TO_RENDER = 100000;

var NonWhitespaceRegexp = /\S/;

function isAllWhitespace(str) {
    return !NonWhitespaceRegexp.test(str);
  }

var left;
    var top;
    if (angle === 0) {
      left = tx[4];
      top = tx[5] - fontAscent;
    } else {
      left = tx[4] + (fontAscent * Math.sin(angle));
      top = tx[5] - (fontAscent * Math.cos(angle));
    }
    textDiv.style.left = left + 'px';
    textDiv.style.top = top + 'px';
    textDiv.style.fontSize = fontHeight + 'px';
    textDiv.style.fontFamily = style.fontFamily;

textDiv.textContent = geom.str;
    // |fontName| is only used by the Font Inspector. This test will succeed
    // when e.g. the Font Inspector is off but the Stepper is on, but it's
    // not worth the effort to do a more accurate test.
    if (PDFJS.pdfBug) {
      textDiv.dataset.fontName = geom.fontName;
    }
    // Storing into dataset will convert number into string.
    if (angle !== 0) {
      textDiv.dataset.angle = angle * (180 / Math.PI);
    }
    // We don't bother scaling single-char text divs, because it has very
    // little effect on text highlighting. This makes scrolling on docs with
    // lots of such divs a lot faster.
    if (geom.str.length > 1) {
      if (style.vertical) {
        textDiv.dataset.canvasWidth = geom.height * viewport.scale;
      } else {
        textDiv.dataset.canvasWidth = geom.width * viewport.scale;
      }
    }
  }

function render(task) {
    if (task._canceled) {
      return;
    }
    var textLayerFrag = task._container;
    var textDivs = task._textDivs;
    var capability = task._capability;
    var textDivsLength = textDivs.length;

// No point in rendering many divs as it would make the browser
    // unusable even after the divs are rendered.
    if (textDivsLength > MAX_TEXT_DIVS_TO_RENDER) {
      capability.resolve();
      return;
    }

var canvas = document.createElement('canvas');
    canvas.mozOpaque = true;
    var ctx = canvas.getContext('2d', {alpha: false});

var lastFontSize;
    var lastFontFamily;
    for (var i = 0; i < textDivsLength; i++) {
      var textDiv = textDivs[i];
      if (textDiv.dataset.isWhitespace !== undefined) {
        continue;
      }

var fontSize = textDiv.style.fontSize;
      var fontFamily = textDiv.style.fontFamily;

// Only build font string and set to context if different from last.
      if (fontSize !== lastFontSize || fontFamily !== lastFontFamily) {
        ctx.font = fontSize + ' ' + fontFamily;
        lastFontSize = fontSize;
        lastFontFamily = fontFamily;
      }

/**
   * Text layer rendering task.
   *
   * @param {TextContent} textContent
   * @param {HTMLElement} container
   * @param {PDFJS.PageViewport} viewport
   * @param {Array} textDivs
   * @private
   */
  function TextLayerRenderTask(textContent, container, viewport, textDivs) {
    this._textContent = textContent;
    this._container = container;
    this._viewport = viewport;
    textDivs = textDivs || [];
    this._textDivs = textDivs;
    this._canceled = false;
    this._capability = createPromiseCapability();
    this._renderTimer = null;
  }
  TextLayerRenderTask.prototype = {
    get promise() {
      return this._capability.promise;
    },

cancel: function TextLayer_cancel() {
      this._canceled = true;
      if (this._renderTimer !== null) {
        clearTimeout(this._renderTimer);
        this._renderTimer = null;
      }
      this._capability.reject('canceled');
    },

_render: function TextLayer_render(timeout) {
      var textItems = this._textContent.items;
      var styles = this._textContent.styles;
      var textDivs = this._textDivs;
      var viewport = this._viewport;
      for (var i = 0, len = textItems.length; i < len; i++) {
        appendText(textDivs, viewport, textItems[i], styles);
      }

if (!timeout) { // Render right away
        render(this);
      } else { // Schedule
        var self = this;
        this._renderTimer = setTimeout(function() {
          render(self);
          self._renderTimer = null;
        }, timeout);
      }
    }
  };

/**
   * Starts rendering of the text layer.
   *
   * @param {TextLayerRenderParameters} renderParameters
   * @returns {TextLayerRenderTask}
   */
  function renderTextLayer(renderParameters) {
    var task = new TextLayerRenderTask(renderParameters.textContent,
                                       renderParameters.container,
                                       renderParameters.viewport,
                                       renderParameters.textDivs);
    task._render(renderParameters.timeout);
    return task;
  }

return renderTextLayer;
})();

PDFJS.renderTextLayer = renderTextLayer;

exports.renderTextLayer = renderTextLayer;
}));

(function (root, factory) {
  {
    factory((root.pdfjsDisplayWebGL = {}), root.pdfjsSharedUtil);
  }
}(this, function (exports, sharedUtil) {

var shadow = sharedUtil.shadow;

// Set the parameters so we can render any size image.
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);

// Upload the image into the texture.
    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);
    return texture;
  }

var currentGL, currentCanvas;
  function generateGL() {
    if (currentGL) {
      return;
    }
    currentCanvas = document.createElement('canvas');
    currentGL = currentCanvas.getContext('webgl',
      { premultipliedalpha: false });
  }

var smaskVertexShaderCode = '\
  attribute vec2 a_position;                                    \
  attribute vec2 a_texCoord;                                    \
                                                                \
  uniform vec2 u_resolution;                                    \
                                                                \
  varying vec2 v_texCoord;                                      \
                                                                \
  void main() {                                                 \
    vec2 clipSpace = (a_position / u_resolution) * 2.0 - 1.0;   \
    gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);          \
                                                                \
    v_texCoord = a_texCoord;                                    \
  }                                                             ';

var smaskCache = null;

function initSmaskGL() {
    var canvas, gl;

generateGL();
    canvas = currentCanvas;
    currentCanvas = null;
    gl = currentGL;
    currentGL = null;

// setup a GLSL program
    var vertexShader = createVertexShader(gl, smaskVertexShaderCode);
    var fragmentShader = createFragmentShader(gl, smaskFragmentShaderCode);
    var program = createProgram(gl, [vertexShader, fragmentShader]);
    gl.useProgram(program);

var cache = {};
    cache.gl = gl;
    cache.canvas = canvas;
    cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution');
    cache.positionLocation = gl.getAttribLocation(program, 'a_position');
    cache.backdropLocation = gl.getUniformLocation(program, 'u_backdrop');
    cache.subtypeLocation = gl.getUniformLocation(program, 'u_subtype');

var texCoordLocation = gl.getAttribLocation(program, 'a_texCoord');
    var texLayerLocation = gl.getUniformLocation(program, 'u_image');
    var texMaskLocation = gl.getUniformLocation(program, 'u_mask');

// provide texture coordinates for the rectangle.
    var texCoordBuffer = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
      0.0,  0.0,
      1.0,  0.0,
      0.0,  1.0,
      0.0,  1.0,
      1.0,  0.0,
      1.0,  1.0]), gl.STATIC_DRAW);
    gl.enableVertexAttribArray(texCoordLocation);
    gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0);

gl.uniform1i(texLayerLocation, 0);
    gl.uniform1i(texMaskLocation, 1);

smaskCache = cache;
  }

function composeSMask(layer, mask, properties) {
    var width = layer.width, height = layer.height;

if (!smaskCache) {
      initSmaskGL();
    }
    var cache = smaskCache,canvas = cache.canvas, gl = cache.gl;
    canvas.width = width;
    canvas.height = height;
    gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
    gl.uniform2f(cache.resolutionLocation, width, height);

if (properties.backdrop) {
      gl.uniform4f(cache.resolutionLocation, properties.backdrop[0],
                   properties.backdrop[1], properties.backdrop[2], 1);
    } else {
      gl.uniform4f(cache.resolutionLocation, 0, 0, 0, 0);
    }
    gl.uniform1i(cache.subtypeLocation,
                 properties.subtype === 'Luminosity' ? 1 : 0);

// Create a textures
    var texture = createTexture(gl, layer, gl.TEXTURE0);
    var maskTexture = createTexture(gl, mask, gl.TEXTURE1);

// Create a buffer and put a single clipspace rectangle in
    // it (2 triangles)
    var buffer = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
      0, 0,
      width, 0,
      0, height,
      0, height,
      width, 0,
      width, height]), gl.STATIC_DRAW);
    gl.enableVertexAttribArray(cache.positionLocation);
    gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0);

// draw
    gl.clearColor(0, 0, 0, 0);
    gl.enable(gl.BLEND);
    gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA);
    gl.clear(gl.COLOR_BUFFER_BIT);

gl.drawArrays(gl.TRIANGLES, 0, 6);

gl.flush();

gl.deleteTexture(texture);
    gl.deleteTexture(maskTexture);
    gl.deleteBuffer(buffer);

return canvas;
  }

var figuresVertexShaderCode = '\
  attribute vec2 a_position;                                    \
  attribute vec3 a_color;                                       \
                                                                \
  uniform vec2 u_resolution;                                    \
  uniform vec2 u_scale;                                         \
  uniform vec2 u_offset;                                        \
                                                                \
  varying vec4 v_color;                                         \
                                                                \
  void main() {                                                 \
    vec2 position = (a_position + u_offset) * u_scale;          \
    vec2 clipSpace = (position / u_resolution) * 2.0 - 1.0;     \
    gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1);          \
                                                                \
    v_color = vec4(a_color / 255.0, 1.0);                       \
  }                                                             ';

var figuresFragmentShaderCode = '\
  precision mediump float;                                      \
                                                                \
  varying vec4 v_color;                                         \
                                                                \
  void main() {                                                 \
    gl_FragColor = v_color;                                     \
  }                                                             ';

var figuresCache = null;

function initFiguresGL() {
    var canvas, gl;

generateGL();
    canvas = currentCanvas;
    currentCanvas = null;
    gl = currentGL;
    currentGL = null;

// setup a GLSL program
    var vertexShader = createVertexShader(gl, figuresVertexShaderCode);
    var fragmentShader = createFragmentShader(gl, figuresFragmentShaderCode);
    var program = createProgram(gl, [vertexShader, fragmentShader]);
    gl.useProgram(program);

var cache = {};
    cache.gl = gl;
    cache.canvas = canvas;
    cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution');
    cache.scaleLocation = gl.getUniformLocation(program, 'u_scale');
    cache.offsetLocation = gl.getUniformLocation(program, 'u_offset');
    cache.positionLocation = gl.getAttribLocation(program, 'a_position');
    cache.colorLocation = gl.getAttribLocation(program, 'a_color');

figuresCache = cache;
  }

function drawFigures(width, height, backgroundColor, figures, context) {
    if (!figuresCache) {
      initFiguresGL();
    }
    var cache = figuresCache, canvas = cache.canvas, gl = cache.gl;

canvas.width = width;
    canvas.height = height;
    gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight);
    gl.uniform2f(cache.resolutionLocation, width, height);

// count triangle points
    var count = 0;
    var i, ii, rows;
    for (i = 0, ii = figures.length; i < ii; i++) {
      switch (figures[i].type) {
        case 'lattice':
          rows = (figures[i].coords.length / figures[i].verticesPerRow) | 0;
          count += (rows - 1) * (figures[i].verticesPerRow - 1) * 6;
          break;
        case 'triangles':
          count += figures[i].coords.length;
          break;
      }
    }
    // transfer data
    var coords = new Float32Array(count * 2);
    var colors = new Uint8Array(count * 3);
    var coordsMap = context.coords, colorsMap = context.colors;
    var pIndex = 0, cIndex = 0;
    for (i = 0, ii = figures.length; i < ii; i++) {
      var figure = figures[i], ps = figure.coords, cs = figure.colors;
      switch (figure.type) {
        case 'lattice':
          var cols = figure.verticesPerRow;
          rows = (ps.length / cols) | 0;
          for (var row = 1; row < rows; row++) {
            var offset = row * cols + 1;
            for (var col = 1; col < cols; col++, offset++) {
              coords[pIndex] = coordsMap[ps[offset - cols - 1]];
              coords[pIndex + 1] = coordsMap[ps[offset - cols - 1] + 1];
              coords[pIndex + 2] = coordsMap[ps[offset - cols]];
              coords[pIndex + 3] = coordsMap[ps[offset - cols] + 1];
              coords[pIndex + 4] = coordsMap[ps[offset - 1]];
              coords[pIndex + 5] = coordsMap[ps[offset - 1] + 1];
              colors[cIndex] = colorsMap[cs[offset - cols - 1]];
              colors[cIndex + 1] = colorsMap[cs[offset - cols - 1] + 1];
              colors[cIndex + 2] = colorsMap[cs[offset - cols - 1] + 2];
              colors[cIndex + 3] = colorsMap[cs[offset - cols]];
              colors[cIndex + 4] = colorsMap[cs[offset - cols] + 1];
              colors[cIndex + 5] = colorsMap[cs[offset - cols] + 2];
              colors[cIndex + 6] = colorsMap[cs[offset - 1]];
              colors[cIndex + 7] = colorsMap[cs[offset - 1] + 1];
              colors[cIndex + 8] = colorsMap[cs[offset - 1] + 2];

coords[pIndex + 6] = coords[pIndex + 2];
              coords[pIndex + 7] = coords[pIndex + 3];
              coords[pIndex + 8] = coords[pIndex + 4];
              coords[pIndex + 9] = coords[pIndex + 5];
              coords[pIndex + 10] = coordsMap[ps[offset]];
              coords[pIndex + 11] = coordsMap[ps[offset] + 1];
              colors[cIndex + 9] = colors[cIndex + 3];
              colors[cIndex + 10] = colors[cIndex + 4];
              colors[cIndex + 11] = colors[cIndex + 5];
              colors[cIndex + 12] = colors[cIndex + 6];
              colors[cIndex + 13] = colors[cIndex + 7];
              colors[cIndex + 14] = colors[cIndex + 8];
              colors[cIndex + 15] = colorsMap[cs[offset]];
              colors[cIndex + 16] = colorsMap[cs[offset] + 1];
              colors[cIndex + 17] = colorsMap[cs[offset] + 2];
              pIndex += 12;
              cIndex += 18;
            }
          }
          break;
        case 'triangles':
          for (var j = 0, jj = ps.length; j < jj; j++) {
            coords[pIndex] = coordsMap[ps[j]];
            coords[pIndex + 1] = coordsMap[ps[j] + 1];
            colors[cIndex] = colorsMap[cs[j]];
            colors[cIndex + 1] = colorsMap[cs[j] + 1];
            colors[cIndex + 2] = colorsMap[cs[j] + 2];
            pIndex += 2;
            cIndex += 3;
          }
          break;
      }
    }

// draw
    if (backgroundColor) {
      gl.clearColor(backgroundColor[0] / 255, backgroundColor[1] / 255,
                    backgroundColor[2] / 255, 1.0);
    } else {
      gl.clearColor(0, 0, 0, 0);
    }
    gl.clear(gl.COLOR_BUFFER_BIT);

var coordsBuffer = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, coordsBuffer);
    gl.bufferData(gl.ARRAY_BUFFER, coords, gl.STATIC_DRAW);
    gl.enableVertexAttribArray(cache.positionLocation);
    gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0);

var colorsBuffer = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, colorsBuffer);
    gl.bufferData(gl.ARRAY_BUFFER, colors, gl.STATIC_DRAW);
    gl.enableVertexAttribArray(cache.colorLocation);
    gl.vertexAttribPointer(cache.colorLocation, 3, gl.UNSIGNED_BYTE, false,
                           0, 0);

gl.uniform2f(cache.scaleLocation, context.scaleX, context.scaleY);
    gl.uniform2f(cache.offsetLocation, context.offsetX, context.offsetY);

gl.drawArrays(gl.TRIANGLES, 0, count);

gl.flush();

gl.deleteBuffer(coordsBuffer);
    gl.deleteBuffer(colorsBuffer);

return canvas;
  }

return {
    get isEnabled() {
      if (PDFJS.disableWebGL) {
        return false;
      }
      var enabled = false;
      try {
        generateGL();
        enabled = !!currentGL;
      } catch (e) { }
      return shadow(this, 'isEnabled', enabled);
    },
    composeSMask: composeSMask,
    drawFigures: drawFigures,
    clear: cleanup
  };
})();

exports.WebGLUtils = WebGLUtils;
}));

(function (root, factory) {
  {
    factory((root.pdfjsDisplayPatternHelper = {}), root.pdfjsSharedUtil,
      root.pdfjsDisplayWebGL);
  }
}(this, function (exports, sharedUtil, displayWebGL) {

var Util = sharedUtil.Util;
var info = sharedUtil.info;
var isArray = sharedUtil.isArray;
var error = sharedUtil.error;
var WebGLUtils = displayWebGL.WebGLUtils;

var ShadingIRs = {};

ShadingIRs.RadialAxial = {
  fromIR: function RadialAxial_fromIR(raw) {
    var type = raw[1];
    var colorStops = raw[2];
    var p0 = raw[3];
    var p1 = raw[4];
    var r0 = raw[5];
    var r1 = raw[6];
    return {
      type: 'Pattern',
      getPattern: function RadialAxial_getPattern(ctx) {
        var grad;
        if (type === 'axial') {
          grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]);
        } else if (type === 'radial') {
          grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1);
        }

for (var i = 0, ii = colorStops.length; i < ii; ++i) {
          var c = colorStops[i];
          grad.addColorStop(c[0], c[1]);
        }
        return grad;
      }
    };
  }
};

function createMeshCanvas(bounds, combinesScale, coords, colors, figures,
                            backgroundColor, cachedCanvases) {
    // we will increase scale on some weird factor to let antialiasing take
    // care of "rough" edges
    var EXPECTED_SCALE = 1.1;
    // MAX_PATTERN_SIZE is used to avoid OOM situation.
    var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough

var offsetX = Math.floor(bounds[0]);
    var offsetY = Math.floor(bounds[1]);
    var boundsWidth = Math.ceil(bounds[2]) - offsetX;
    var boundsHeight = Math.ceil(bounds[3]) - offsetY;

var width = Math.min(Math.ceil(Math.abs(boundsWidth * combinesScale[0] *
      EXPECTED_SCALE)), MAX_PATTERN_SIZE);
    var height = Math.min(Math.ceil(Math.abs(boundsHeight * combinesScale[1] *
      EXPECTED_SCALE)), MAX_PATTERN_SIZE);
    var scaleX = boundsWidth / width;
    var scaleY = boundsHeight / height;

var context = {
      coords: coords,
      colors: colors,
      offsetX: -offsetX,
      offsetY: -offsetY,
      scaleX: 1 / scaleX,
      scaleY: 1 / scaleY
    };

var canvas, tmpCanvas, i, ii;
    if (WebGLUtils.isEnabled) {
      canvas = WebGLUtils.drawFigures(width, height, backgroundColor,
                                      figures, context);

// https://bugzilla.mozilla.org/show_bug.cgi?id=972126
      tmpCanvas = cachedCanvases.getCanvas('mesh', width, height, false);
      tmpCanvas.context.drawImage(canvas, 0, 0);
      canvas = tmpCanvas.canvas;
    } else {
      tmpCanvas = cachedCanvases.getCanvas('mesh', width, height, false);
      var tmpCtx = tmpCanvas.context;

return {canvas: canvas, offsetX: offsetX, offsetY: offsetY,
            scaleX: scaleX, scaleY: scaleY};
  }
  return createMeshCanvas;
})();

ShadingIRs.Mesh = {
  fromIR: function Mesh_fromIR(raw) {
    //var type = raw[1];
    var coords = raw[2];
    var colors = raw[3];
    var figures = raw[4];
    var bounds = raw[5];
    var matrix = raw[6];
    //var bbox = raw[7];
    var background = raw[8];
    return {
      type: 'Pattern',
      getPattern: function Mesh_getPattern(ctx, owner, shadingFill) {
        var scale;
        if (shadingFill) {
          scale = Util.singularValueDecompose2dScale(ctx.mozCurrentTransform);
        } else {
          // Obtain scale from matrix and current transformation matrix.
          scale = Util.singularValueDecompose2dScale(owner.baseTransform);
          if (matrix) {
            var matrixScale = Util.singularValueDecompose2dScale(matrix);
            scale = [scale[0] * matrixScale[0],
                     scale[1] * matrixScale[1]];
          }
        }

// Rasterizing on the main thread since sending/queue large canvases
        // might cause OOM.
        var temporaryPatternCanvas = createMeshCanvas(bounds, scale, coords,
          colors, figures, shadingFill ? null : background,
          owner.cachedCanvases);

if (!shadingFill) {
          ctx.setTransform.apply(ctx, owner.baseTransform);
          if (matrix) {
            ctx.transform.apply(ctx, matrix);
          }
        }

ctx.translate(temporaryPatternCanvas.offsetX,
                      temporaryPatternCanvas.offsetY);
        ctx.scale(temporaryPatternCanvas.scaleX,
                  temporaryPatternCanvas.scaleY);

return ctx.createPattern(temporaryPatternCanvas.canvas, 'no-repeat');
      }
    };
  }
};

ShadingIRs.Dummy = {
  fromIR: function Dummy_fromIR() {
    return {
      type: 'Pattern',
      getPattern: function Dummy_fromIR_getPattern() {
        return 'hotpink';
      }
    };
  }
};

function getShadingPatternFromIR(raw) {
  var shadingIR = ShadingIRs[raw[0]];
  if (!shadingIR) {
    error('Unknown IR type: ' + raw[0]);
  }
  return shadingIR.fromIR(raw);
}

var TilingPattern = (function TilingPatternClosure() {
  var PaintType = {
    COLORED: 1,
    UNCOLORED: 2
  };

var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough

function TilingPattern(IR, color, ctx, canvasGraphicsFactory, baseTransform) {
    this.operatorList = IR[2];
    this.matrix = IR[3] || [1, 0, 0, 1, 0, 0];
    this.bbox = IR[4];
    this.xstep = IR[5];
    this.ystep = IR[6];
    this.paintType = IR[7];
    this.tilingType = IR[8];
    this.color = color;
    this.canvasGraphicsFactory = canvasGraphicsFactory;
    this.baseTransform = baseTransform;
    this.type = 'Pattern';
    this.ctx = ctx;
  }

TilingPattern.prototype = {
    createPatternCanvas: function TilinPattern_createPatternCanvas(owner) {
      var operatorList = this.operatorList;
      var bbox = this.bbox;
      var xstep = this.xstep;
      var ystep = this.ystep;
      var paintType = this.paintType;
      var tilingType = this.tilingType;
      var color = this.color;
      var canvasGraphicsFactory = this.canvasGraphicsFactory;

info('TilingType: ' + tilingType);

var x0 = bbox[0], y0 = bbox[1], x1 = bbox[2], y1 = bbox[3];

var topLeft = [x0, y0];
      // we want the canvas to be as large as the step size
      var botRight = [x0 + xstep, y0 + ystep];

var width = botRight[0] - topLeft[0];
      var height = botRight[1] - topLeft[1];

// Obtain scale from matrix and current transformation matrix.
      var matrixScale = Util.singularValueDecompose2dScale(this.matrix);
      var curMatrixScale = Util.singularValueDecompose2dScale(
        this.baseTransform);
      var combinedScale = [matrixScale[0] * curMatrixScale[0],
        matrixScale[1] * curMatrixScale[1]];

// MAX_PATTERN_SIZE is used to avoid OOM situation.
      // Use width and height values that are as close as possible to the end
      // result when the pattern is used. Too low value makes the pattern look
      // blurry. Too large value makes it look too crispy.
      width = Math.min(Math.ceil(Math.abs(width * combinedScale[0])),
        MAX_PATTERN_SIZE);

height = Math.min(Math.ceil(Math.abs(height * combinedScale[1])),
        MAX_PATTERN_SIZE);

var tmpCanvas = owner.cachedCanvases.getCanvas('pattern',
        width, height, true);
      var tmpCtx = tmpCanvas.context;
      var graphics = canvasGraphicsFactory.createCanvasGraphics(tmpCtx);
      graphics.groupLevel = owner.groupLevel;

this.setFillAndStrokeStyleToContext(tmpCtx, paintType, color);

this.setScale(width, height, xstep, ystep);
      this.transformToScale(graphics);

// transform coordinates to pattern space
      var tmpTranslate = [1, 0, 0, 1, -topLeft[0], -topLeft[1]];
      graphics.transform.apply(graphics, tmpTranslate);

this.clipBbox(graphics, bbox, x0, y0, x1, y1);

graphics.executeOperatorList(operatorList);
      return tmpCanvas.canvas;
    },

setScale: function TilingPattern_setScale(width, height, xstep, ystep) {
      this.scale = [width / xstep, height / ystep];
    },

transformToScale: function TilingPattern_transformToScale(graphics) {
      var scale = this.scale;
      var tmpScale = [scale[0], 0, 0, scale[1], 0, 0];
      graphics.transform.apply(graphics, tmpScale);
    },

scaleToContext: function TilingPattern_scaleToContext() {
      var scale = this.scale;
      this.ctx.scale(1 / scale[0], 1 / scale[1]);
    },

clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) {
      if (bbox && isArray(bbox) && bbox.length === 4) {
        var bboxWidth = x1 - x0;
        var bboxHeight = y1 - y0;
        graphics.ctx.rect(x0, y0, bboxWidth, bboxHeight);
        graphics.clip();
        graphics.endPath();
      }
    },

setFillAndStrokeStyleToContext:
      function setFillAndStrokeStyleToContext(context, paintType, color) {
        switch (paintType) {
          case PaintType.COLORED:
            var ctx = this.ctx;
            context.fillStyle = ctx.fillStyle;
            context.strokeStyle = ctx.strokeStyle;
            break;
          case PaintType.UNCOLORED:
            var cssColor = Util.makeCssRgb(color[0], color[1], color[2]);
            context.fillStyle = cssColor;
            context.strokeStyle = cssColor;
            break;
          default:
            error('Unsupported paint type: ' + paintType);
        }
      },

getPattern: function TilingPattern_getPattern(ctx, owner) {
      var temporaryPatternCanvas = this.createPatternCanvas(owner);

ctx = this.ctx;
      ctx.setTransform.apply(ctx, this.baseTransform);
      ctx.transform.apply(ctx, this.matrix);
      this.scaleToContext();

return ctx.createPattern(temporaryPatternCanvas, 'repeat');
    }
  };

return TilingPattern;
})();

exports.getShadingPatternFromIR = getShadingPatternFromIR;
exports.TilingPattern = TilingPattern;
}));

(function (root, factory) {
  {
    factory((root.pdfjsDisplayCanvas = {}), root.pdfjsSharedUtil,
      root.pdfjsDisplayPatternHelper, root.pdfjsDisplayWebGL);
  }
}(this, function (exports, sharedUtil, displayPatternHelper, displayWebGL) {

var FONT_IDENTITY_MATRIX = sharedUtil.FONT_IDENTITY_MATRIX;
var IDENTITY_MATRIX = sharedUtil.IDENTITY_MATRIX;
var ImageKind = sharedUtil.ImageKind;
var OPS = sharedUtil.OPS;
var TextRenderingMode = sharedUtil.TextRenderingMode;
var Uint32ArrayView = sharedUtil.Uint32ArrayView;
var Util = sharedUtil.Util;
var assert = sharedUtil.assert;
var info = sharedUtil.info;
var isNum = sharedUtil.isNum;
var isArray = sharedUtil.isArray;
var error = sharedUtil.error;
var shadow = sharedUtil.shadow;
var warn = sharedUtil.warn;
var TilingPattern = displayPatternHelper.TilingPattern;
var getShadingPatternFromIR = displayPatternHelper.getShadingPatternFromIR;
var WebGLUtils = displayWebGL.WebGLUtils;

// <canvas> contexts store most of the state we need natively.
// However, PDF needs a bit more state, which we store here.

// Minimal font size that would be used during canvas fillText operations.
var MIN_FONT_SIZE = 16;
// Maximum font size that would be used during canvas fillText operations.
var MAX_FONT_SIZE = 100;
var MAX_GROUP_SIZE = 4096;

// Heuristic value used when enforcing minimum line widths.
var MIN_WIDTH_FACTOR = 0.65;

var COMPILE_TYPE3_GLYPHS = true;
var MAX_SIZE_TO_COMPILE = 1000;

var FULL_CHUNK_HEIGHT = 16;

function createScratchCanvas(width, height) {
  var canvas = document.createElement('canvas');
  canvas.width = width;
  canvas.height = height;
  return canvas;
}

function addContextCurrentTransform(ctx) {
  // If the context doesn't expose a `mozCurrentTransform`, add a JS based one.
  if (!ctx.mozCurrentTransform) {
    ctx._originalSave = ctx.save;
    ctx._originalRestore = ctx.restore;
    ctx._originalRotate = ctx.rotate;
    ctx._originalScale = ctx.scale;
    ctx._originalTranslate = ctx.translate;
    ctx._originalTransform = ctx.transform;
    ctx._originalSetTransform = ctx.setTransform;

ctx._transformMatrix = ctx._transformMatrix || [1, 0, 0, 1, 0, 0];
    ctx._transformStack = [];

Object.defineProperty(ctx, 'mozCurrentTransform', {
      get: function getCurrentTransform() {
        return this._transformMatrix;
      }
    });

Object.defineProperty(ctx, 'mozCurrentTransformInverse', {
      get: function getCurrentTransformInverse() {
        // Calculation done using WolframAlpha:
        // http://www.wolframalpha.com/input/?
        //   i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}}

var m = this._transformMatrix;
        var a = m[0], b = m[1], c = m[2], d = m[3], e = m[4], f = m[5];

var ad_bc = a * d - b * c;
        var bc_ad = b * c - a * d;

return [
          d / ad_bc,
          b / bc_ad,
          c / bc_ad,
          a / ad_bc,
          (d * e - c * f) / bc_ad,
          (b * e - a * f) / ad_bc
        ];
      }
    });

ctx.save = function ctxSave() {
      var old = this._transformMatrix;
      this._transformStack.push(old);
      this._transformMatrix = old.slice(0, 6);

this._originalSave();
    };

ctx.restore = function ctxRestore() {
      var prev = this._transformStack.pop();
      if (prev) {
        this._transformMatrix = prev;
        this._originalRestore();
      }
    };

ctx.translate = function ctxTranslate(x, y) {
      var m = this._transformMatrix;
      m[4] = m[0] * x + m[2] * y + m[4];
      m[5] = m[1] * x + m[3] * y + m[5];

this._originalTranslate(x, y);
    };

ctx.scale = function ctxScale(x, y) {
      var m = this._transformMatrix;
      m[0] = m[0] * x;
      m[1] = m[1] * x;
      m[2] = m[2] * y;
      m[3] = m[3] * y;

this._originalScale(x, y);
    };

ctx.transform = function ctxTransform(a, b, c, d, e, f) {
      var m = this._transformMatrix;
      this._transformMatrix = [
        m[0] * a + m[2] * b,
        m[1] * a + m[3] * b,
        m[0] * c + m[2] * d,
        m[1] * c + m[3] * d,
        m[0] * e + m[2] * f + m[4],
        m[1] * e + m[3] * f + m[5]
      ];

ctx._originalTransform(a, b, c, d, e, f);
    };

ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) {
      this._transformMatrix = [a, b, c, d, e, f];

ctx._originalSetTransform(a, b, c, d, e, f);
    };

ctx.rotate = function ctxRotate(angle) {
      var cosValue = Math.cos(angle);
      var sinValue = Math.sin(angle);

var m = this._transformMatrix;
      this._transformMatrix = [
        m[0] * cosValue + m[2] * sinValue,
        m[1] * cosValue + m[3] * sinValue,
        m[0] * (-sinValue) + m[2] * cosValue,
        m[1] * (-sinValue) + m[3] * cosValue,
        m[4],
        m[5]
      ];

this._originalRotate(angle);
    };
  }
}

function compileType3Glyph(imgData) {
  var POINT_TO_PROCESS_LIMIT = 1000;

var width = imgData.width, height = imgData.height;
  var i, j, j0, width1 = width + 1;
  var points = new Uint8Array(width1 * (height + 1));
  var POINT_TYPES =
      new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]);

// decodes bit-packed mask data
  var lineSize = (width + 7) & ~7, data0 = imgData.data;
  var data = new Uint8Array(lineSize * height), pos = 0, ii;
  for (i = 0, ii = data0.length; i < ii; i++) {
    var mask = 128, elem = data0[i];
    while (mask > 0) {
      data[pos++] = (elem & mask) ? 0 : 255;
      mask >>= 1;
    }
  }

// finding iteresting points: every point is located between mask pixels,
  // so there will be points of the (width + 1)x(height + 1) grid. Every point
  // will have flags assigned based on neighboring mask pixels:
  //   4 | 8
  //   --P--
  //   2 | 1
  // We are interested only in points with the flags:
  //   - outside corners: 1, 2, 4, 8;
  //   - inside corners: 7, 11, 13, 14;
  //   - and, intersections: 5, 10.
  var count = 0;
  pos = 0;
  if (data[pos] !== 0) {
    points[0] = 1;
    ++count;
  }
  for (j = 1; j < width; j++) {
    if (data[pos] !== data[pos + 1]) {
      points[j] = data[pos] ? 2 : 1;
      ++count;
    }
    pos++;
  }
  if (data[pos] !== 0) {
    points[j] = 2;
    ++count;
  }
  for (i = 1; i < height; i++) {
    pos = i * lineSize;
    j0 = i * width1;
    if (data[pos - lineSize] !== data[pos]) {
      points[j0] = data[pos] ? 1 : 8;
      ++count;
    }
    // 'sum' is the position of the current pixel configuration in the 'TYPES'
    // array (in order 8-1-2-4, so we can use '>>2' to shift the column).
    var sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0);
    for (j = 1; j < width; j++) {
      sum = (sum >> 2) + (data[pos + 1] ? 4 : 0) +
            (data[pos - lineSize + 1] ? 8 : 0);
      if (POINT_TYPES[sum]) {
        points[j0 + j] = POINT_TYPES[sum];
        ++count;
      }
      pos++;
    }
    if (data[pos - lineSize] !== data[pos]) {
      points[j0 + j] = data[pos] ? 2 : 4;
      ++count;
    }

if (count > POINT_TO_PROCESS_LIMIT) {
      return null;
    }
  }

pos = lineSize * (height - 1);
  j0 = i * width1;
  if (data[pos] !== 0) {
    points[j0] = 8;
    ++count;
  }
  for (j = 1; j < width; j++) {
    if (data[pos] !== data[pos + 1]) {
      points[j0 + j] = data[pos] ? 4 : 8;
      ++count;
    }
    pos++;
  }
  if (data[pos] !== 0) {
    points[j0 + j] = 4;
    ++count;
  }
  if (count > POINT_TO_PROCESS_LIMIT) {
    return null;
  }

// building outlines
  var steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]);
  var outlines = [];
  for (i = 0; count && i <= height; i++) {
    var p = i * width1;
    var end = p + width;
    while (p < end && !points[p]) {
      p++;
    }
    if (p === end) {
      continue;
    }
    var coords = [p % width1, i];

var type = points[p], p0 = p, pp;
    do {
      var step = steps[type];
      do {
        p += step;
      } while (!points[p]);

pp = points[p];
      if (pp !== 5 && pp !== 10) {
        // set new direction
        type = pp;
        // delete mark
        points[p] = 0;
      } else { // type is 5 or 10, ie, a crossing
        // set new direction
        type = pp & ((0x33 * type) >> 4);
        // set new type for "future hit"
        points[p] &= (type >> 2 | type << 2);
      }

coords.push(p % width1);
      coords.push((p / width1) | 0);
      --count;
    } while (p0 !== p);
    outlines.push(coords);
    --i;
  }

return drawOutline;
}

var CanvasExtraState = (function CanvasExtraStateClosure() {
  function CanvasExtraState(old) {
    // Are soft masks and alpha values shapes or opacities?
    this.alphaIsShape = false;
    this.fontSize = 0;
    this.fontSizeScale = 1;
    this.textMatrix = IDENTITY_MATRIX;
    this.textMatrixScale = 1;
    this.fontMatrix = FONT_IDENTITY_MATRIX;
    this.leading = 0;
    // Current point (in user coordinates)
    this.x = 0;
    this.y = 0;
    // Start of text line (in text coordinates)
    this.lineX = 0;
    this.lineY = 0;
    // Character and word spacing
    this.charSpacing = 0;
    this.wordSpacing = 0;
    this.textHScale = 1;
    this.textRenderingMode = TextRenderingMode.FILL;
    this.textRise = 0;
    // Default fore and background colors
    this.fillColor = '#000000';
    this.strokeColor = '#000000';
    this.patternFill = false;
    // Note: fill alpha applies to all non-stroking operations
    this.fillAlpha = 1;
    this.strokeAlpha = 1;
    this.lineWidth = 1;
    this.activeSMask = null; // nonclonable field (see the save method below)

this.old = old;
  }

CanvasExtraState.prototype = {
    clone: function CanvasExtraState_clone() {
      return Object.create(this);
    },
    setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) {
      this.x = x;
      this.y = y;
    }
  };
  return CanvasExtraState;
})();

var CanvasGraphics = (function CanvasGraphicsClosure() {
  // Defines the time the executeOperatorList is going to be executing
  // before it stops and shedules a continue of execution.
  var EXECUTION_TIME = 15;
  // Defines the number of steps before checking the execution time
  var EXECUTION_STEPS = 10;

function CanvasGraphics(canvasCtx, commonObjs, objs, imageLayer) {
    this.ctx = canvasCtx;
    this.current = new CanvasExtraState();
    this.stateStack = [];
    this.pendingClip = null;
    this.pendingEOFill = false;
    this.res = null;
    this.xobjs = null;
    this.commonObjs = commonObjs;
    this.objs = objs;
    this.imageLayer = imageLayer;
    this.groupStack = [];
    this.processingType3 = null;
    // Patterns are painted relative to the initial page/form transform, see pdf
    // spec 8.7.2 NOTE 1.
    this.baseTransform = null;
    this.baseTransformStack = [];
    this.groupLevel = 0;
    this.smaskStack = [];
    this.smaskCounter = 0;
    this.tempSMask = null;
    this.cachedCanvases = new CachedCanvases();
    if (canvasCtx) {
      // NOTE: if mozCurrentTransform is polyfilled, then the current state of
      // the transformation must already be set in canvasCtx._transformMatrix.
      addContextCurrentTransform(canvasCtx);
    }
    this.cachedGetSinglePixelWidth = null;
  }

function putBinaryImageData(ctx, imgData) {
    if (typeof ImageData !== 'undefined' && imgData instanceof ImageData) {
      ctx.putImageData(imgData, 0, 0);
      return;
    }

// Put the image data to the canvas in chunks, rather than putting the
    // whole image at once.  This saves JS memory, because the ImageData object
    // is smaller. It also possibly saves C++ memory within the implementation
    // of putImageData(). (E.g. in Firefox we make two short-lived copies of
    // the data passed to putImageData()). |n| shouldn't be too small, however,
    // because too many putImageData() calls will slow things down.
    //
    // Note: as written, if the last chunk is partial, the putImageData() call
    // will (conceptually) put pixels past the bounds of the canvas.  But
    // that's ok; any such pixels are ignored.

var height = imgData.height, width = imgData.width;
    var partialChunkHeight = height % FULL_CHUNK_HEIGHT;
    var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;
    var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;

var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);
    var srcPos = 0, destPos;
    var src = imgData.data;
    var dest = chunkImgData.data;
    var i, j, thisChunkHeight, elemsInThisChunk;

// There are multiple forms in which the pixel data can be passed, and
    // imgData.kind tells us which one this is.
    if (imgData.kind === ImageKind.GRAYSCALE_1BPP) {
      // Grayscale, 1 bit per pixel (i.e. black-and-white).
      var srcLength = src.byteLength;
      var dest32 = PDFJS.hasCanvasTypedArrays ? new Uint32Array(dest.buffer) :
        new Uint32ArrayView(dest);
      var dest32DataLength = dest32.length;
      var fullSrcDiff = (width + 7) >> 3;
      var white = 0xFFFFFFFF;
      var black = (PDFJS.isLittleEndian || !PDFJS.hasCanvasTypedArrays) ?
        0xFF000000 : 0x000000FF;
      for (i = 0; i < totalChunks; i++) {
        thisChunkHeight =
          (i < fullChunks) ? FULL_CHUNK_HEIGHT : partialChunkHeight;
        destPos = 0;
        for (j = 0; j < thisChunkHeight; j++) {
          var srcDiff = srcLength - srcPos;
          var k = 0;
          var kEnd = (srcDiff > fullSrcDiff) ? width : srcDiff * 8 - 7;
          var kEndUnrolled = kEnd & ~7;
          var mask = 0;
          var srcByte = 0;
          for (; k < kEndUnrolled; k += 8) {
            srcByte = src[srcPos++];
            dest32[destPos++] = (srcByte & 128) ? white : black;
            dest32[destPos++] = (srcByte & 64) ? white : black;
            dest32[destPos++] = (srcByte & 32) ? white : black;
            dest32[destPos++] = (srcByte & 16) ? white : black;
            dest32[destPos++] = (srcByte & 8) ? white : black;
            dest32[destPos++] = (srcByte & 4) ? white : black;
            dest32[destPos++] = (srcByte & 2) ? white : black;
            dest32[destPos++] = (srcByte & 1) ? white : black;
          }
          for (; k < kEnd; k++) {
             if (mask === 0) {
               srcByte = src[srcPos++];
               mask = 128;
             }

dest32[destPos++] = (srcByte & mask) ? white : black;
            mask >>= 1;
          }
        }
        // We ran out of input. Make all remaining pixels transparent.
        while (destPos < dest32DataLength) {
          dest32[destPos++] = 0;
        }

ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);
      }
    } else if (imgData.kind === ImageKind.RGBA_32BPP) {
      // RGBA, 32-bits per pixel.

j = 0;
      elemsInThisChunk = width * FULL_CHUNK_HEIGHT * 4;
      for (i = 0; i < fullChunks; i++) {
        dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));
        srcPos += elemsInThisChunk;

ctx.putImageData(chunkImgData, 0, j);
        j += FULL_CHUNK_HEIGHT;
      }
      if (i < totalChunks) {
        elemsInThisChunk = width * partialChunkHeight * 4;
        dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));
        ctx.putImageData(chunkImgData, 0, j);
      }

} else if (imgData.kind === ImageKind.RGB_24BPP) {
      // RGB, 24-bits per pixel.
      thisChunkHeight = FULL_CHUNK_HEIGHT;
      elemsInThisChunk = width * thisChunkHeight;
      for (i = 0; i < totalChunks; i++) {
        if (i >= fullChunks) {
          thisChunkHeight = partialChunkHeight;
          elemsInThisChunk = width * thisChunkHeight;
        }

destPos = 0;
        for (j = elemsInThisChunk; j--;) {
          dest[destPos++] = src[srcPos++];
          dest[destPos++] = src[srcPos++];
          dest[destPos++] = src[srcPos++];
          dest[destPos++] = 255;
        }
        ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);
      }
    } else {
      error('bad image kind: ' + imgData.kind);
    }
  }

function putBinaryImageMask(ctx, imgData) {
    var height = imgData.height, width = imgData.width;
    var partialChunkHeight = height % FULL_CHUNK_HEIGHT;
    var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;
    var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;

var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);
    var srcPos = 0;
    var src = imgData.data;
    var dest = chunkImgData.data;

for (var i = 0; i < totalChunks; i++) {
      var thisChunkHeight =
        (i < fullChunks) ? FULL_CHUNK_HEIGHT : partialChunkHeight;

// Expand the mask so it can be used by the canvas.  Any required
      // inversion has already been handled.
      var destPos = 3; // alpha component offset
      for (var j = 0; j < thisChunkHeight; j++) {
        var mask = 0;
        for (var k = 0; k < width; k++) {
          if (!mask) {
            var elem = src[srcPos++];
            mask = 128;
          }
          dest[destPos] = (elem & mask) ? 0 : 255;
          destPos += 4;
          mask >>= 1;
        }
      }
      ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);
    }
  }

function composeSMaskAlpha(maskData, layerData, transferMap) {
    var length = maskData.length;
    var scale = 1 / 255;
    for (var i = 3; i < length; i += 4) {
      var alpha = transferMap ? transferMap[maskData[i]] : maskData[i];
      layerData[i] = (layerData[i] * alpha * scale) | 0;
    }
  }

function composeSMaskLuminosity(maskData, layerData, transferMap) {
    var length = maskData.length;
    for (var i = 3; i < length; i += 4) {
      var y = (maskData[i - 3] * 77) +  // * 0.3 / 255 * 0x10000
              (maskData[i - 2] * 152) + // * 0.59 ....
              (maskData[i - 1] * 28);   // * 0.11 ....
      layerData[i] = transferMap ?
        (layerData[i] * transferMap[y >> 8]) >> 8 :
        (layerData[i] * y) >> 16;
    }
  }

function genericComposeSMask(maskCtx, layerCtx, width, height,
                               subtype, backdrop, transferMap) {
    var hasBackdrop = !!backdrop;
    var r0 = hasBackdrop ? backdrop[0] : 0;
    var g0 = hasBackdrop ? backdrop[1] : 0;
    var b0 = hasBackdrop ? backdrop[2] : 0;

var composeFn;
    if (subtype === 'Luminosity') {
      composeFn = composeSMaskLuminosity;
    } else {
      composeFn = composeSMaskAlpha;
    }

// processing image in chunks to save memory
    var PIXELS_TO_PROCESS = 1048576;
    var chunkSize = Math.min(height, Math.ceil(PIXELS_TO_PROCESS / width));
    for (var row = 0; row < height; row += chunkSize) {
      var chunkHeight = Math.min(chunkSize, height - row);
      var maskData = maskCtx.getImageData(0, row, width, chunkHeight);
      var layerData = layerCtx.getImageData(0, row, width, chunkHeight);

if (hasBackdrop) {
        composeSMaskBackdrop(maskData.data, r0, g0, b0);
      }
      composeFn(maskData.data, layerData.data, transferMap);

maskCtx.putImageData(layerData, 0, row);
    }
  }

function composeSMask(ctx, smask, layerCtx) {
    var mask = smask.canvas;
    var maskCtx = smask.context;

ctx.setTransform(smask.scaleX, 0, 0, smask.scaleY,
                     smask.offsetX, smask.offsetY);

var backdrop = smask.backdrop || null;
    if (!smask.transferMap && WebGLUtils.isEnabled) {
      var composed = WebGLUtils.composeSMask(layerCtx.canvas, mask,
        {subtype: smask.subtype, backdrop: backdrop});
      ctx.setTransform(1, 0, 0, 1, 0, 0);
      ctx.drawImage(composed, smask.offsetX, smask.offsetY);
      return;
    }
    genericComposeSMask(maskCtx, layerCtx, mask.width, mask.height,
                        smask.subtype, backdrop, smask.transferMap);
    ctx.drawImage(mask, 0, 0);
  }

var LINE_CAP_STYLES = ['butt', 'round', 'square'];
  var LINE_JOIN_STYLES = ['miter', 'round', 'bevel'];
  var NORMAL_CLIP = {};
  var EO_CLIP = {};

CanvasGraphics.prototype = {

beginDrawing: function CanvasGraphics_beginDrawing(transform, viewport,
                                                       transparency) {
      // For pdfs that use blend modes we have to clear the canvas else certain
      // blend modes can look wrong since we'd be blending with a white
      // backdrop. The problem with a transparent backdrop though is we then
      // don't get sub pixel anti aliasing on text, creating temporary
      // transparent canvas when we have blend modes.
      var width = this.ctx.canvas.width;
      var height = this.ctx.canvas.height;

this.ctx.save();
      this.ctx.fillStyle = 'rgb(255, 255, 255)';
      this.ctx.fillRect(0, 0, width, height);
      this.ctx.restore();

if (transparency) {
        var transparentCanvas = this.cachedCanvases.getCanvas(
          'transparent', width, height, true);
        this.compositeCtx = this.ctx;
        this.transparentCanvas = transparentCanvas.canvas;
        this.ctx = transparentCanvas.context;
        this.ctx.save();
        // The transform can be applied before rendering, transferring it to
        // the new canvas.
        this.ctx.transform.apply(this.ctx,
                                 this.compositeCtx.mozCurrentTransform);
      }

this.ctx.save();
      if (transform) {
        this.ctx.transform.apply(this.ctx, transform);
      }
      this.ctx.transform.apply(this.ctx, viewport.transform);

this.baseTransform = this.ctx.mozCurrentTransform.slice();

if (this.imageLayer) {
        this.imageLayer.beginLayout();
      }
    },

executeOperatorList: function CanvasGraphics_executeOperatorList(
                                    operatorList,
                                    executionStartIdx, continueCallback,
                                    stepper) {
      var argsArray = operatorList.argsArray;
      var fnArray = operatorList.fnArray;
      var i = executionStartIdx || 0;
      var argsArrayLen = argsArray.length;

// Sometimes the OperatorList to execute is empty.
      if (argsArrayLen === i) {
        return i;
      }

var chunkOperations = (argsArrayLen - i > EXECUTION_STEPS &&
                             typeof continueCallback === 'function');
      var endTime = chunkOperations ? Date.now() + EXECUTION_TIME : 0;
      var steps = 0;

var commonObjs = this.commonObjs;
      var objs = this.objs;
      var fnId;

while (true) {
        if (stepper !== undefined && i === stepper.nextBreakPoint) {
          stepper.breakIt(i, continueCallback);
          return i;
        }

fnId = fnArray[i];

if (fnId !== OPS.dependency) {
          this[fnId].apply(this, argsArray[i]);
        } else {
          var deps = argsArray[i];
          for (var n = 0, nn = deps.length; n < nn; n++) {
            var depObjId = deps[n];
            var common = depObjId[0] === 'g' && depObjId[1] === '_';
            var objsPool = common ? commonObjs : objs;

// If the promise isn't resolved yet, add the continueCallback
            // to the promise and bail out.
            if (!objsPool.isResolved(depObjId)) {
              objsPool.get(depObjId, continueCallback);
              return i;
            }
          }
        }

i++;

// If the entire operatorList was executed, stop as were done.
        if (i === argsArrayLen) {
          return i;
        }

// If the execution took longer then a certain amount of time and
        // `continueCallback` is specified, interrupt the execution.
        if (chunkOperations && ++steps > EXECUTION_STEPS) {
          if (Date.now() > endTime) {
            continueCallback();
            return i;
          }
          steps = 0;
        }

// If the operatorList isn't executed completely yet OR the execution
        // time was short enough, do another execution round.
      }
    },

endDrawing: function CanvasGraphics_endDrawing() {
      this.ctx.restore();

if (this.transparentCanvas) {
        this.ctx = this.compositeCtx;
        this.ctx.drawImage(this.transparentCanvas, 0, 0);
        this.transparentCanvas = null;
      }

this.cachedCanvases.clear();
      WebGLUtils.clear();

if (this.imageLayer) {
        this.imageLayer.endLayout();
      }
    },

// Graphics state
    setLineWidth: function CanvasGraphics_setLineWidth(width) {
      this.current.lineWidth = width;
      this.ctx.lineWidth = width;
    },
    setLineCap: function CanvasGraphics_setLineCap(style) {
      this.ctx.lineCap = LINE_CAP_STYLES[style];
    },
    setLineJoin: function CanvasGraphics_setLineJoin(style) {
      this.ctx.lineJoin = LINE_JOIN_STYLES[style];
    },
    setMiterLimit: function CanvasGraphics_setMiterLimit(limit) {
      this.ctx.miterLimit = limit;
    },
    setDash: function CanvasGraphics_setDash(dashArray, dashPhase) {
      var ctx = this.ctx;
      if (ctx.setLineDash !== undefined) {
        ctx.setLineDash(dashArray);
        ctx.lineDashOffset = dashPhase;
      } else {
        ctx.mozDash = dashArray;
        ctx.mozDashOffset = dashPhase;
      }
    },
    setRenderingIntent: function CanvasGraphics_setRenderingIntent(intent) {
      // Maybe if we one day fully support color spaces this will be important
      // for now we can ignore.
      // TODO set rendering intent?
    },
    setFlatness: function CanvasGraphics_setFlatness(flatness) {
      // There's no way to control this with canvas, but we can safely ignore.
      // TODO set flatness?
    },
    setGState: function CanvasGraphics_setGState(states) {
      for (var i = 0, ii = states.length; i < ii; i++) {
        var state = states[i];
        var key = state[0];
        var value = state[1];

switch (key) {
          case 'LW':
            this.setLineWidth(value);
            break;
          case 'LC':
            this.setLineCap(value);
            break;
          case 'LJ':
            this.setLineJoin(value);
            break;
          case 'ML':
            this.setMiterLimit(value);
            break;
          case 'D':
            this.setDash(value[0], value[1]);
            break;
          case 'RI':
            this.setRenderingIntent(value);
            break;
          case 'FL':
            this.setFlatness(value);
            break;
          case 'Font':
            this.setFont(value[0], value[1]);
            break;
          case 'CA':
            this.current.strokeAlpha = state[1];
            break;
          case 'ca':
            this.current.fillAlpha = state[1];
            this.ctx.globalAlpha = state[1];
            break;
          case 'BM':
            if (value && value.name && (value.name !== 'Normal')) {
              var mode = value.name.replace(/([A-Z])/g,
                function(c) {
                  return '-' + c.toLowerCase();
                }
              ).substring(1);
              this.ctx.globalCompositeOperation = mode;
              if (this.ctx.globalCompositeOperation !== mode) {
                warn('globalCompositeOperation "' + mode +
                     '" is not supported');
              }
            } else {
              this.ctx.globalCompositeOperation = 'source-over';
            }
            break;
          case 'SMask':
            if (this.current.activeSMask) {
              this.endSMaskGroup();
            }
            this.current.activeSMask = value ? this.tempSMask : null;
            if (this.current.activeSMask) {
              this.beginSMaskGroup();
            }
            this.tempSMask = null;
            break;
        }
      }
    },
    beginSMaskGroup: function CanvasGraphics_beginSMaskGroup() {

var activeSMask = this.current.activeSMask;
      var drawnWidth = activeSMask.canvas.width;
      var drawnHeight = activeSMask.canvas.height;
      var cacheId = 'smaskGroupAt' + this.groupLevel;
      var scratchCanvas = this.cachedCanvases.getCanvas(
        cacheId, drawnWidth, drawnHeight, true);

var currentCtx = this.ctx;
      var currentTransform = currentCtx.mozCurrentTransform;
      this.ctx.save();

var groupCtx = scratchCanvas.context;
      groupCtx.scale(1 / activeSMask.scaleX, 1 / activeSMask.scaleY);
      groupCtx.translate(-activeSMask.offsetX, -activeSMask.offsetY);
      groupCtx.transform.apply(groupCtx, currentTransform);

copyCtxState(currentCtx, groupCtx);
      this.ctx = groupCtx;
      this.setGState([
        ['BM', 'Normal'],
        ['ca', 1],
        ['CA', 1]
      ]);
      this.groupStack.push(currentCtx);
      this.groupLevel++;
    },
    endSMaskGroup: function CanvasGraphics_endSMaskGroup() {
      var groupCtx = this.ctx;
      this.groupLevel--;
      this.ctx = this.groupStack.pop();

composeSMask(this.ctx, this.current.activeSMask, groupCtx);
      this.ctx.restore();
      copyCtxState(groupCtx, this.ctx);
    },
    save: function CanvasGraphics_save() {
      this.ctx.save();
      var old = this.current;
      this.stateStack.push(old);
      this.current = old.clone();
      this.current.activeSMask = null;
    },
    restore: function CanvasGraphics_restore() {
      if (this.stateStack.length !== 0) {
        if (this.current.activeSMask !== null) {
          this.endSMaskGroup();
        }

this.current = this.stateStack.pop();
        this.ctx.restore();

// Ensure that the clipping path is reset (fixes issue6413.pdf).
        this.pendingClip = null;

this.cachedGetSinglePixelWidth = null;
      }
    },
    transform: function CanvasGraphics_transform(a, b, c, d, e, f) {
      this.ctx.transform(a, b, c, d, e, f);

this.cachedGetSinglePixelWidth = null;
    },

// Path
    constructPath: function CanvasGraphics_constructPath(ops, args) {
      var ctx = this.ctx;
      var current = this.current;
      var x = current.x, y = current.y;
      for (var i = 0, j = 0, ii = ops.length; i < ii; i++) {
        switch (ops[i] | 0) {
          case OPS.rectangle:
            x = args[j++];
            y = args[j++];
            var width = args[j++];
            var height = args[j++];
            if (width === 0) {
              width = this.getSinglePixelWidth();
            }
            if (height === 0) {
              height = this.getSinglePixelWidth();
            }
            var xw = x + width;
            var yh = y + height;
            this.ctx.moveTo(x, y);
            this.ctx.lineTo(xw, y);
            this.ctx.lineTo(xw, yh);
            this.ctx.lineTo(x, yh);
            this.ctx.lineTo(x, y);
            this.ctx.closePath();
            break;
          case OPS.moveTo:
            x = args[j++];
            y = args[j++];
            ctx.moveTo(x, y);
            break;
          case OPS.lineTo:
            x = args[j++];
            y = args[j++];
            ctx.lineTo(x, y);
            break;
          case OPS.curveTo:
            x = args[j + 4];
            y = args[j + 5];
            ctx.bezierCurveTo(args[j], args[j + 1], args[j + 2], args[j + 3],
                              x, y);
            j += 6;
            break;
          case OPS.curveTo2:
            ctx.bezierCurveTo(x, y, args[j], args[j + 1],
                              args[j + 2], args[j + 3]);
            x = args[j + 2];
            y = args[j + 3];
            j += 4;
            break;
          case OPS.curveTo3:
            x = args[j + 2];
            y = args[j + 3];
            ctx.bezierCurveTo(args[j], args[j + 1], x, y, x, y);
            j += 4;
            break;
          case OPS.closePath:
            ctx.closePath();
            break;
        }
      }
      current.setCurrentPoint(x, y);
    },
    closePath: function CanvasGraphics_closePath() {
      this.ctx.closePath();
    },
    stroke: function CanvasGraphics_stroke(consumePath) {
      consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
      var ctx = this.ctx;
      var strokeColor = this.current.strokeColor;
      // Prevent drawing too thin lines by enforcing a minimum line width.
      ctx.lineWidth = Math.max(this.getSinglePixelWidth() * MIN_WIDTH_FACTOR,
                               this.current.lineWidth);
      // For stroke we want to temporarily change the global alpha to the
      // stroking alpha.
      ctx.globalAlpha = this.current.strokeAlpha;
      if (strokeColor && strokeColor.hasOwnProperty('type') &&
          strokeColor.type === 'Pattern') {
        // for patterns, we transform to pattern space, calculate
        // the pattern, call stroke, and restore to user space
        ctx.save();
        ctx.strokeStyle = strokeColor.getPattern(ctx, this);
        ctx.stroke();
        ctx.restore();
      } else {
        ctx.stroke();
      }
      if (consumePath) {
        this.consumePath();
      }
      // Restore the global alpha to the fill alpha
      ctx.globalAlpha = this.current.fillAlpha;
    },
    closeStroke: function CanvasGraphics_closeStroke() {
      this.closePath();
      this.stroke();
    },
    fill: function CanvasGraphics_fill(consumePath) {
      consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
      var ctx = this.ctx;
      var fillColor = this.current.fillColor;
      var isPatternFill = this.current.patternFill;
      var needRestore = false;

if (isPatternFill) {
        ctx.save();
        if (this.baseTransform) {
          ctx.setTransform.apply(ctx, this.baseTransform);
        }
        ctx.fillStyle = fillColor.getPattern(ctx, this);
        needRestore = true;
      }

if (this.pendingEOFill) {
        if (ctx.mozFillRule !== undefined) {
          ctx.mozFillRule = 'evenodd';
          ctx.fill();
          ctx.mozFillRule = 'nonzero';
        } else {
          ctx.fill('evenodd');
        }
        this.pendingEOFill = false;
      } else {
        ctx.fill();
      }

if (needRestore) {
        ctx.restore();
      }
      if (consumePath) {
        this.consumePath();
      }
    },
    eoFill: function CanvasGraphics_eoFill() {
      this.pendingEOFill = true;
      this.fill();
    },
    fillStroke: function CanvasGraphics_fillStroke() {
      this.fill(false);
      this.stroke(false);

this.consumePath();
    },
    eoFillStroke: function CanvasGraphics_eoFillStroke() {
      this.pendingEOFill = true;
      this.fillStroke();
    },
    closeFillStroke: function CanvasGraphics_closeFillStroke() {
      this.closePath();
      this.fillStroke();
    },
    closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() {
      this.pendingEOFill = true;
      this.closePath();
      this.fillStroke();
    },
    endPath: function CanvasGraphics_endPath() {
      this.consumePath();
    },

// Clipping
    clip: function CanvasGraphics_clip() {
      this.pendingClip = NORMAL_CLIP;
    },
    eoClip: function CanvasGraphics_eoClip() {
      this.pendingClip = EO_CLIP;
    },

// Text
    beginText: function CanvasGraphics_beginText() {
      this.current.textMatrix = IDENTITY_MATRIX;
      this.current.textMatrixScale = 1;
      this.current.x = this.current.lineX = 0;
      this.current.y = this.current.lineY = 0;
    },
    endText: function CanvasGraphics_endText() {
      var paths = this.pendingTextPaths;
      var ctx = this.ctx;
      if (paths === undefined) {
        ctx.beginPath();
        return;
      }

ctx.save();
      ctx.beginPath();
      for (var i = 0; i < paths.length; i++) {
        var path = paths[i];
        ctx.setTransform.apply(ctx, path.transform);
        ctx.translate(path.x, path.y);
        path.addToPath(ctx, path.fontSize);
      }
      ctx.restore();
      ctx.clip();
      ctx.beginPath();
      delete this.pendingTextPaths;
    },
    setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) {
      this.current.charSpacing = spacing;
    },
    setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) {
      this.current.wordSpacing = spacing;
    },
    setHScale: function CanvasGraphics_setHScale(scale) {
      this.current.textHScale = scale / 100;
    },
    setLeading: function CanvasGraphics_setLeading(leading) {
      this.current.leading = -leading;
    },
    setFont: function CanvasGraphics_setFont(fontRefName, size) {
      var fontObj = this.commonObjs.get(fontRefName);
      var current = this.current;

if (!fontObj) {
        error('Can\'t find font for ' + fontRefName);
      }

current.fontMatrix = (fontObj.fontMatrix ?
                            fontObj.fontMatrix : FONT_IDENTITY_MATRIX);

// A valid matrix needs all main diagonal elements to be non-zero
      // This also ensures we bypass FF bugzilla bug #719844.
      if (current.fontMatrix[0] === 0 ||
          current.fontMatrix[3] === 0) {
        warn('Invalid font matrix for font ' + fontRefName);
      }

// The spec for Tf (setFont) says that 'size' specifies the font 'scale',
      // and in some docs this can be negative (inverted x-y axes).
      if (size < 0) {
        size = -size;
        current.fontDirection = -1;
      } else {
        current.fontDirection = 1;
      }

this.current.font = fontObj;
      this.current.fontSize = size;

if (fontObj.isType3Font) {
        return; // we don't need ctx.font for Type3 fonts
      }

var name = fontObj.loadedName || 'sans-serif';
      var bold = fontObj.black ? (fontObj.bold ? '900' : 'bold') :
                                 (fontObj.bold ? 'bold' : 'normal');

var italic = fontObj.italic ? 'italic' : 'normal';
      var typeface = '"' + name + '", ' + fontObj.fallbackName;

// Some font backends cannot handle fonts below certain size.
      // Keeping the font at minimal size and using the fontSizeScale to change
      // the current transformation matrix before the fillText/strokeText.
      // See https://bugzilla.mozilla.org/show_bug.cgi?id=726227
      var browserFontSize = size < MIN_FONT_SIZE ? MIN_FONT_SIZE :
                            size > MAX_FONT_SIZE ? MAX_FONT_SIZE : size;
      this.current.fontSizeScale = size / browserFontSize;

this.current.x = this.current.lineX = 0;
      this.current.y = this.current.lineY = 0;
    },
    nextLine: function CanvasGraphics_nextLine() {
      this.moveText(0, this.current.leading);
    },

paintChar: function CanvasGraphics_paintChar(character, x, y) {
      var ctx = this.ctx;
      var current = this.current;
      var font = current.font;
      var textRenderingMode = current.textRenderingMode;
      var fontSize = current.fontSize / current.fontSizeScale;
      var fillStrokeMode = textRenderingMode &
        TextRenderingMode.FILL_STROKE_MASK;
      var isAddToPathSet = !!(textRenderingMode &
        TextRenderingMode.ADD_TO_PATH_FLAG);

var addToPath;
      if (font.disableFontFace || isAddToPathSet) {
        addToPath = font.getPathGenerator(this.commonObjs, character);
      }

if (font.disableFontFace) {
        ctx.save();
        ctx.translate(x, y);
        ctx.beginPath();
        addToPath(ctx, fontSize);
        if (fillStrokeMode === TextRenderingMode.FILL ||
            fillStrokeMode === TextRenderingMode.FILL_STROKE) {
          ctx.fill();
        }
        if (fillStrokeMode === TextRenderingMode.STROKE ||
            fillStrokeMode === TextRenderingMode.FILL_STROKE) {
          ctx.stroke();
        }
        ctx.restore();
      } else {
        if (fillStrokeMode === TextRenderingMode.FILL ||
            fillStrokeMode === TextRenderingMode.FILL_STROKE) {
          ctx.fillText(character, x, y);
        }
        if (fillStrokeMode === TextRenderingMode.STROKE ||
            fillStrokeMode === TextRenderingMode.FILL_STROKE) {
          ctx.strokeText(character, x, y);
        }
      }

if (isAddToPathSet) {
        var paths = this.pendingTextPaths || (this.pendingTextPaths = []);
        paths.push({
          transform: ctx.mozCurrentTransform,
          x: x,
          y: y,
          fontSize: fontSize,
          addToPath: addToPath
        });
      }
    },

get isFontSubpixelAAEnabled() {
      // Checks if anti-aliasing is enabled when scaled text is painted.
      // On Windows GDI scaled fonts looks bad.
      var ctx = document.createElement('canvas').getContext('2d');
      ctx.scale(1.5, 1);
      ctx.fillText('I', 0, 10);
      var data = ctx.getImageData(0, 0, 10, 10).data;
      var enabled = false;
      for (var i = 3; i < data.length; i += 4) {
        if (data[i] > 0 && data[i] < 255) {
          enabled = true;
          break;
        }
      }
      return shadow(this, 'isFontSubpixelAAEnabled', enabled);
    },

showText: function CanvasGraphics_showText(glyphs) {
      var current = this.current;
      var font = current.font;
      if (font.isType3Font) {
        return this.showType3Text(glyphs);
      }

var fontSize = current.fontSize;
      if (fontSize === 0) {
        return;
      }

var ctx = this.ctx;
      var fontSizeScale = current.fontSizeScale;
      var charSpacing = current.charSpacing;
      var wordSpacing = current.wordSpacing;
      var fontDirection = current.fontDirection;
      var textHScale = current.textHScale * fontDirection;
      var glyphsLength = glyphs.length;
      var vertical = font.vertical;
      var spacingDir = vertical ? 1 : -1;
      var defaultVMetrics = font.defaultVMetrics;
      var widthAdvanceScale = fontSize * current.fontMatrix[0];

var simpleFillText =
        current.textRenderingMode === TextRenderingMode.FILL &&
        !font.disableFontFace;

ctx.save();
      ctx.transform.apply(ctx, current.textMatrix);
      ctx.translate(current.x, current.y + current.textRise);

if (current.patternFill) {
        // TODO: Some shading patterns are not applied correctly to text,
        //       e.g. issues 3988 and 5432, and ShowText-ShadingPattern.pdf.
        ctx.fillStyle = current.fillColor.getPattern(ctx, this);
      }

if (fontDirection > 0) {
        ctx.scale(textHScale, -1);
      } else {
        ctx.scale(textHScale, 1);
      }

if (fontSizeScale !== 1.0) {
        ctx.scale(fontSizeScale, fontSizeScale);
        lineWidth /= fontSizeScale;
      }

ctx.lineWidth = lineWidth;

var x = 0, i;
      for (i = 0; i < glyphsLength; ++i) {
        var glyph = glyphs[i];
        if (isNum(glyph)) {
          x += spacingDir * glyph * fontSize / 1000;
          continue;
        }

var restoreNeeded = false;
        var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing;
        var character = glyph.fontChar;
        var accent = glyph.accent;
        var scaledX, scaledY, scaledAccentX, scaledAccentY;
        var width = glyph.width;
        if (vertical) {
          var vmetric, vx, vy;
          vmetric = glyph.vmetric || defaultVMetrics;
          vx = glyph.vmetric ? vmetric[1] : width * 0.5;
          vx = -vx * widthAdvanceScale;
          vy = vmetric[2] * widthAdvanceScale;

width = vmetric ? -vmetric[0] : width;
          scaledX = vx / fontSizeScale;
          scaledY = (x + vy) / fontSizeScale;
        } else {
          scaledX = x / fontSizeScale;
          scaledY = 0;
        }

if (font.remeasure && width > 0) {
          // Some standard fonts may not have the exact width: rescale per
          // character if measured width is greater than expected glyph width
          // and subpixel-aa is enabled, otherwise just center the glyph.
          var measuredWidth = ctx.measureText(character).width * 1000 /
            fontSize * fontSizeScale;
          if (width < measuredWidth && this.isFontSubpixelAAEnabled) {
            var characterScaleX = width / measuredWidth;
            restoreNeeded = true;
            ctx.save();
            ctx.scale(characterScaleX, 1);
            scaledX /= characterScaleX;
          } else if (width !== measuredWidth) {
            scaledX += (width - measuredWidth) / 2000 *
              fontSize / fontSizeScale;
          }
        }

if (simpleFillText && !accent) {
          // common case
          ctx.fillText(character, scaledX, scaledY);
        } else {
          this.paintChar(character, scaledX, scaledY);
          if (accent) {
            scaledAccentX = scaledX + accent.offset.x / fontSizeScale;
            scaledAccentY = scaledY - accent.offset.y / fontSizeScale;
            this.paintChar(accent.fontChar, scaledAccentX, scaledAccentY);
          }
        }

var charWidth = width * widthAdvanceScale + spacing * fontDirection;
        x += charWidth;

if (restoreNeeded) {
          ctx.restore();
        }
      }
      if (vertical) {
        current.y -= x * textHScale;
      } else {
        current.x += x * textHScale;
      }
      ctx.restore();
    },

showType3Text: function CanvasGraphics_showType3Text(glyphs) {
      // Type3 fonts - each glyph is a "mini-PDF"
      var ctx = this.ctx;
      var current = this.current;
      var font = current.font;
      var fontSize = current.fontSize;
      var fontDirection = current.fontDirection;
      var spacingDir = font.vertical ? 1 : -1;
      var charSpacing = current.charSpacing;
      var wordSpacing = current.wordSpacing;
      var textHScale = current.textHScale * fontDirection;
      var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX;
      var glyphsLength = glyphs.length;
      var isTextInvisible =
        current.textRenderingMode === TextRenderingMode.INVISIBLE;
      var i, glyph, width, spacingLength;

if (isTextInvisible || fontSize === 0) {
        return;
      }
      this.cachedGetSinglePixelWidth = null;

ctx.save();
      ctx.transform.apply(ctx, current.textMatrix);
      ctx.translate(current.x, current.y);

ctx.scale(textHScale, fontDirection);

for (i = 0; i < glyphsLength; ++i) {
        glyph = glyphs[i];
        if (isNum(glyph)) {
          spacingLength = spacingDir * glyph * fontSize / 1000;
          this.ctx.translate(spacingLength, 0);
          current.x += spacingLength * textHScale;
          continue;
        }

var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing;
        var operatorList = font.charProcOperatorList[glyph.operatorListId];
        if (!operatorList) {
          warn('Type3 character \"' + glyph.operatorListId +
               '\" is not available');
          continue;
        }
        this.processingType3 = glyph;
        this.save();
        ctx.scale(fontSize, fontSize);
        ctx.transform.apply(ctx, fontMatrix);
        this.executeOperatorList(operatorList);
        this.restore();

var transformed = Util.applyTransform([glyph.width, 0], fontMatrix);
        width = transformed[0] * fontSize + spacing;

ctx.translate(width, 0);
        current.x += width * textHScale;
      }
      ctx.restore();
      this.processingType3 = null;
    },

// Type3 fonts
    setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) {
      // We can safely ignore this since the width should be the same
      // as the width in the Widths array.
    },
    setCharWidthAndBounds: function CanvasGraphics_setCharWidthAndBounds(xWidth,
                                                                        yWidth,
                                                                        llx,
                                                                        lly,
                                                                        urx,
                                                                        ury) {
      // TODO According to the spec we're also suppose to ignore any operators
      // that set color or include images while processing this type3 font.
      this.ctx.rect(llx, lly, urx - llx, ury - lly);
      this.clip();
      this.endPath();
    },

// Color
    getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR) {
      var pattern;
      if (IR[0] === 'TilingPattern') {
        var color = IR[1];
        var baseTransform = this.baseTransform ||
                            this.ctx.mozCurrentTransform.slice();
        var self = this;
        var canvasGraphicsFactory = {
          createCanvasGraphics: function (ctx) {
            return new CanvasGraphics(ctx, self.commonObjs, self.objs);
          }
        };
        pattern = new TilingPattern(IR, color, this.ctx, canvasGraphicsFactory,
                                    baseTransform);
      } else {
        pattern = getShadingPatternFromIR(IR);
      }
      return pattern;
    },
    setStrokeColorN: function CanvasGraphics_setStrokeColorN(/*...*/) {
      this.current.strokeColor = this.getColorN_Pattern(arguments);
    },
    setFillColorN: function CanvasGraphics_setFillColorN(/*...*/) {
      this.current.fillColor = this.getColorN_Pattern(arguments);
      this.current.patternFill = true;
    },
    setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) {
      var color = Util.makeCssRgb(r, g, b);
      this.ctx.strokeStyle = color;
      this.current.strokeColor = color;
    },
    setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) {
      var color = Util.makeCssRgb(r, g, b);
      this.ctx.fillStyle = color;
      this.current.fillColor = color;
      this.current.patternFill = false;
    },

shadingFill: function CanvasGraphics_shadingFill(patternIR) {
      var ctx = this.ctx;

this.save();
      var pattern = getShadingPatternFromIR(patternIR);
      ctx.fillStyle = pattern.getPattern(ctx, this, true);

var inv = ctx.mozCurrentTransformInverse;
      if (inv) {
        var canvas = ctx.canvas;
        var width = canvas.width;
        var height = canvas.height;

var bl = Util.applyTransform([0, 0], inv);
        var br = Util.applyTransform([0, height], inv);
        var ul = Util.applyTransform([width, 0], inv);
        var ur = Util.applyTransform([width, height], inv);

var x0 = Math.min(bl[0], br[0], ul[0], ur[0]);
        var y0 = Math.min(bl[1], br[1], ul[1], ur[1]);
        var x1 = Math.max(bl[0], br[0], ul[0], ur[0]);
        var y1 = Math.max(bl[1], br[1], ul[1], ur[1]);

this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0);
      } else {
        // HACK to draw the gradient onto an infinite rectangle.
        // PDF gradients are drawn across the entire image while
        // Canvas only allows gradients to be drawn in a rectangle
        // The following bug should allow us to remove this.
        // https://bugzilla.mozilla.org/show_bug.cgi?id=664884

this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10);
      }

this.restore();
    },

// Images
    beginInlineImage: function CanvasGraphics_beginInlineImage() {
      error('Should not call beginInlineImage');
    },
    beginImageData: function CanvasGraphics_beginImageData() {
      error('Should not call beginImageData');
    },

paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(matrix,
                                                                        bbox) {
      this.save();
      this.baseTransformStack.push(this.baseTransform);

if (isArray(matrix) && 6 === matrix.length) {
        this.transform.apply(this, matrix);
      }

this.baseTransform = this.ctx.mozCurrentTransform;

if (isArray(bbox) && 4 === bbox.length) {
        var width = bbox[2] - bbox[0];
        var height = bbox[3] - bbox[1];
        this.ctx.rect(bbox[0], bbox[1], width, height);
        this.clip();
        this.endPath();
      }
    },

paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() {
      this.restore();
      this.baseTransform = this.baseTransformStack.pop();
    },

beginGroup: function CanvasGraphics_beginGroup(group) {
      this.save();
      var currentCtx = this.ctx;
      // TODO non-isolated groups - according to Rik at adobe non-isolated
      // group results aren't usually that different and they even have tools
      // that ignore this setting. Notes from Rik on implmenting:
      // - When you encounter an transparency group, create a new canvas with
      // the dimensions of the bbox
      // - copy the content from the previous canvas to the new canvas
      // - draw as usual
      // - remove the backdrop alpha:
      // alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha
      // value of your transparency group and 'alphaBackdrop' the alpha of the
      // backdrop
      // - remove background color:
      // colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew)
      if (!group.isolated) {
        info('TODO: Support non-isolated groups.');
      }

// TODO knockout - supposedly possible with the clever use of compositing
      // modes.
      if (group.knockout) {
        warn('Knockout groups not supported.');
      }

var currentTransform = currentCtx.mozCurrentTransform;
      if (group.matrix) {
        currentCtx.transform.apply(currentCtx, group.matrix);
      }
      assert(group.bbox, 'Bounding box is required.');

// Based on the current transform figure out how big the bounding box
      // will actually be.
      var bounds = Util.getAxialAlignedBoundingBox(
                    group.bbox,
                    currentCtx.mozCurrentTransform);
      // Clip the bounding box to the current canvas.
      var canvasBounds = [0,
                          0,
                          currentCtx.canvas.width,
                          currentCtx.canvas.height];
      bounds = Util.intersect(bounds, canvasBounds) || [0, 0, 0, 0];
      // Use ceil in case we're between sizes so we don't create canvas that is
      // too small and make the canvas at least 1x1 pixels.
      var offsetX = Math.floor(bounds[0]);
      var offsetY = Math.floor(bounds[1]);
      var drawnWidth = Math.max(Math.ceil(bounds[2]) - offsetX, 1);
      var drawnHeight = Math.max(Math.ceil(bounds[3]) - offsetY, 1);
      var scaleX = 1, scaleY = 1;
      if (drawnWidth > MAX_GROUP_SIZE) {
        scaleX = drawnWidth / MAX_GROUP_SIZE;
        drawnWidth = MAX_GROUP_SIZE;
      }
      if (drawnHeight > MAX_GROUP_SIZE) {
        scaleY = drawnHeight / MAX_GROUP_SIZE;
        drawnHeight = MAX_GROUP_SIZE;
      }

var cacheId = 'groupAt' + this.groupLevel;
      if (group.smask) {
        // Using two cache entries is case if masks are used one after another.
        cacheId +=  '_smask_' + ((this.smaskCounter++) % 2);
      }
      var scratchCanvas = this.cachedCanvases.getCanvas(
        cacheId, drawnWidth, drawnHeight, true);
      var groupCtx = scratchCanvas.context;

// Since we created a new canvas that is just the size of the bounding box
      // we have to translate the group ctx.
      groupCtx.scale(1 / scaleX, 1 / scaleY);
      groupCtx.translate(-offsetX, -offsetY);
      groupCtx.transform.apply(groupCtx, currentTransform);

if (group.smask) {
        // Saving state and cached mask to be used in setGState.
        this.smaskStack.push({
          canvas: scratchCanvas.canvas,
          context: groupCtx,
          offsetX: offsetX,
          offsetY: offsetY,
          scaleX: scaleX,
          scaleY: scaleY,
          subtype: group.smask.subtype,
          backdrop: group.smask.backdrop,
          transferMap: group.smask.transferMap || null
        });
      } else {
        // Setup the current ctx so when the group is popped we draw it at the
        // right location.
        currentCtx.setTransform(1, 0, 0, 1, 0, 0);
        currentCtx.translate(offsetX, offsetY);
        currentCtx.scale(scaleX, scaleY);
      }
      // The transparency group inherits all off the current graphics state
      // except the blend mode, soft mask, and alpha constants.
      copyCtxState(currentCtx, groupCtx);
      this.ctx = groupCtx;
      this.setGState([
        ['BM', 'Normal'],
        ['ca', 1],
        ['CA', 1]
      ]);
      this.groupStack.push(currentCtx);
      this.groupLevel++;
    },

endGroup: function CanvasGraphics_endGroup(group) {
      this.groupLevel--;
      var groupCtx = this.ctx;
      this.ctx = this.groupStack.pop();
      // Turn off image smoothing to avoid sub pixel interpolation which can
      // look kind of blurry for some pdfs.
      if (this.ctx.imageSmoothingEnabled !== undefined) {
        this.ctx.imageSmoothingEnabled = false;
      } else {
        this.ctx.mozImageSmoothingEnabled = false;
      }
      if (group.smask) {
        this.tempSMask = this.smaskStack.pop();
      } else {
        this.ctx.drawImage(groupCtx.canvas, 0, 0);
      }
      this.restore();
    },

beginAnnotations: function CanvasGraphics_beginAnnotations() {
      this.save();
      this.current = new CanvasExtraState();

if (this.baseTransform) {
        this.ctx.setTransform.apply(this.ctx, this.baseTransform);
      }
    },

endAnnotations: function CanvasGraphics_endAnnotations() {
      this.restore();
    },

beginAnnotation: function CanvasGraphics_beginAnnotation(rect, transform,
                                                             matrix) {
      this.save();

if (isArray(rect) && 4 === rect.length) {
        var width = rect[2] - rect[0];
        var height = rect[3] - rect[1];
        this.ctx.rect(rect[0], rect[1], width, height);
        this.clip();
        this.endPath();
      }

this.transform.apply(this, transform);
      this.transform.apply(this, matrix);
    },

endAnnotation: function CanvasGraphics_endAnnotation() {
      this.restore();
    },

paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) {
      var domImage = this.objs.get(objId);
      if (!domImage) {
        warn('Dependent image isn\'t ready yet');
        return;
      }

this.save();

var ctx = this.ctx;
      // scale the image to the unit square
      ctx.scale(1 / w, -1 / h);

ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height,
                    0, -h, w, h);
      if (this.imageLayer) {
        var currentTransform = ctx.mozCurrentTransformInverse;
        var position = this.getCanvasPosition(0, 0);
        this.imageLayer.appendImage({
          objId: objId,
          left: position[0],
          top: position[1],
          width: w / currentTransform[0],
          height: h / currentTransform[3]
        });
      }
      this.restore();
    },

paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) {
      var ctx = this.ctx;
      var width = img.width, height = img.height;
      var fillColor = this.current.fillColor;
      var isPatternFill = this.current.patternFill;

var glyph = this.processingType3;

if (COMPILE_TYPE3_GLYPHS && glyph && glyph.compiled === undefined) {
        if (width <= MAX_SIZE_TO_COMPILE && height <= MAX_SIZE_TO_COMPILE) {
          glyph.compiled =
            compileType3Glyph({data: img.data, width: width, height: height});
        } else {
          glyph.compiled = null;
        }
      }

if (glyph && glyph.compiled) {
        glyph.compiled(ctx);
        return;
      }

var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas',
                                                     width, height);
      var maskCtx = maskCanvas.context;
      maskCtx.save();

putBinaryImageMask(maskCtx, img);

maskCtx.globalCompositeOperation = 'source-in';

maskCtx.fillStyle = isPatternFill ?
                          fillColor.getPattern(maskCtx, this) : fillColor;
      maskCtx.fillRect(0, 0, width, height);

maskCtx.restore();

this.paintInlineImageXObject(maskCanvas.canvas);
    },

paintImageMaskXObjectRepeat:
      function CanvasGraphics_paintImageMaskXObjectRepeat(imgData, scaleX,
                                                          scaleY, positions) {
      var width = imgData.width;
      var height = imgData.height;
      var fillColor = this.current.fillColor;
      var isPatternFill = this.current.patternFill;

var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas',
                                                     width, height);
      var maskCtx = maskCanvas.context;
      maskCtx.save();

putBinaryImageMask(maskCtx, imgData);

maskCtx.globalCompositeOperation = 'source-in';

maskCtx.fillStyle = isPatternFill ?
                          fillColor.getPattern(maskCtx, this) : fillColor;
      maskCtx.fillRect(0, 0, width, height);

maskCtx.restore();

var ctx = this.ctx;
      for (var i = 0, ii = positions.length; i < ii; i += 2) {
        ctx.save();
        ctx.transform(scaleX, 0, 0, scaleY, positions[i], positions[i + 1]);
        ctx.scale(1, -1);
        ctx.drawImage(maskCanvas.canvas, 0, 0, width, height,
          0, -1, 1, 1);
        ctx.restore();
      }
    },

paintImageMaskXObjectGroup:
      function CanvasGraphics_paintImageMaskXObjectGroup(images) {
      var ctx = this.ctx;

var fillColor = this.current.fillColor;
      var isPatternFill = this.current.patternFill;
      for (var i = 0, ii = images.length; i < ii; i++) {
        var image = images[i];
        var width = image.width, height = image.height;

var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas',
                                                       width, height);
        var maskCtx = maskCanvas.context;
        maskCtx.save();

putBinaryImageMask(maskCtx, image);

maskCtx.globalCompositeOperation = 'source-in';

maskCtx.fillStyle = isPatternFill ?
                            fillColor.getPattern(maskCtx, this) : fillColor;
        maskCtx.fillRect(0, 0, width, height);

maskCtx.restore();

ctx.save();
        ctx.transform.apply(ctx, image.transform);
        ctx.scale(1, -1);
        ctx.drawImage(maskCanvas.canvas, 0, 0, width, height,
                      0, -1, 1, 1);
        ctx.restore();
      }
    },

paintImageXObject: function CanvasGraphics_paintImageXObject(objId) {
      var imgData = this.objs.get(objId);
      if (!imgData) {
        warn('Dependent image isn\'t ready yet');
        return;
      }

this.paintInlineImageXObject(imgData);
    },

paintImageXObjectRepeat:
      function CanvasGraphics_paintImageXObjectRepeat(objId, scaleX, scaleY,
                                                          positions) {
      var imgData = this.objs.get(objId);
      if (!imgData) {
        warn('Dependent image isn\'t ready yet');
        return;
      }

var width = imgData.width;
      var height = imgData.height;
      var map = [];
      for (var i = 0, ii = positions.length; i < ii; i += 2) {
        map.push({transform: [scaleX, 0, 0, scaleY, positions[i],
                 positions[i + 1]], x: 0, y: 0, w: width, h: height});
      }
      this.paintInlineImageXObjectGroup(imgData, map);
    },

paintInlineImageXObject:
      function CanvasGraphics_paintInlineImageXObject(imgData) {
      var width = imgData.width;
      var height = imgData.height;
      var ctx = this.ctx;

this.save();
      // scale the image to the unit square
      ctx.scale(1 / width, -1 / height);

var currentTransform = ctx.mozCurrentTransformInverse;
      var a = currentTransform[0], b = currentTransform[1];
      var widthScale = Math.max(Math.sqrt(a * a + b * b), 1);
      var c = currentTransform[2], d = currentTransform[3];
      var heightScale = Math.max(Math.sqrt(c * c + d * d), 1);

var imgToPaint, tmpCanvas;
      // instanceof HTMLElement does not work in jsdom node.js module
      if (imgData instanceof HTMLElement || !imgData.data) {
        imgToPaint = imgData;
      } else {
        tmpCanvas = this.cachedCanvases.getCanvas('inlineImage',
                                                  width, height);
        var tmpCtx = tmpCanvas.context;
        putBinaryImageData(tmpCtx, imgData);
        imgToPaint = tmpCanvas.canvas;
      }

if (this.imageLayer) {
        var position = this.getCanvasPosition(0, -height);
        this.imageLayer.appendImage({
          imgData: imgData,
          left: position[0],
          top: position[1],
          width: width / currentTransform[0],
          height: height / currentTransform[3]
        });
      }
      this.restore();
    },

paintInlineImageXObjectGroup:
      function CanvasGraphics_paintInlineImageXObjectGroup(imgData, map) {
      var ctx = this.ctx;
      var w = imgData.width;
      var h = imgData.height;

var tmpCanvas = this.cachedCanvases.getCanvas('inlineImage', w, h);
      var tmpCtx = tmpCanvas.context;
      putBinaryImageData(tmpCtx, imgData);

for (var i = 0, ii = map.length; i < ii; i++) {
        var entry = map[i];
        ctx.save();
        ctx.transform.apply(ctx, entry.transform);
        ctx.scale(1, -1);
        ctx.drawImage(tmpCanvas.canvas, entry.x, entry.y, entry.w, entry.h,
                      0, -1, 1, 1);
        if (this.imageLayer) {
          var position = this.getCanvasPosition(entry.x, entry.y);
          this.imageLayer.appendImage({
            imgData: imgData,
            left: position[0],
            top: position[1],
            width: w,
            height: h
          });
        }
        ctx.restore();
      }
    },

paintSolidColorImageMask:
      function CanvasGraphics_paintSolidColorImageMask() {
        this.ctx.fillRect(0, 0, 1, 1);
    },

paintXObject: function CanvasGraphics_paintXObject() {
      warn('Unsupported \'paintXObject\' command.');
    },

// Marked content

markPoint: function CanvasGraphics_markPoint(tag) {
      // TODO Marked content.
    },
    markPointProps: function CanvasGraphics_markPointProps(tag, properties) {
      // TODO Marked content.
    },
    beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) {
      // TODO Marked content.
    },
    beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps(
                                        tag, properties) {
      // TODO Marked content.
    },
    endMarkedContent: function CanvasGraphics_endMarkedContent() {
      // TODO Marked content.
    },

// Compatibility

beginCompat: function CanvasGraphics_beginCompat() {
      // TODO ignore undefined operators (should we do that anyway?)
    },
    endCompat: function CanvasGraphics_endCompat() {
      // TODO stop ignoring undefined operators
    },

// Helper functions

consumePath: function CanvasGraphics_consumePath() {
      var ctx = this.ctx;
      if (this.pendingClip) {
        if (this.pendingClip === EO_CLIP) {
          if (ctx.mozFillRule !== undefined) {
            ctx.mozFillRule = 'evenodd';
            ctx.clip();
            ctx.mozFillRule = 'nonzero';
          } else {
            ctx.clip('evenodd');
          }
        } else {
          ctx.clip();
        }
        this.pendingClip = null;
      }
      ctx.beginPath();
    },
    getSinglePixelWidth: function CanvasGraphics_getSinglePixelWidth(scale) {
      if (this.cachedGetSinglePixelWidth === null) {
        var inverse = this.ctx.mozCurrentTransformInverse;
        // max of the current horizontal and vertical scale
        this.cachedGetSinglePixelWidth = Math.sqrt(Math.max(
          (inverse[0] * inverse[0] + inverse[1] * inverse[1]),
          (inverse[2] * inverse[2] + inverse[3] * inverse[3])));
      }
      return this.cachedGetSinglePixelWidth;
    },
    getCanvasPosition: function CanvasGraphics_getCanvasPosition(x, y) {
      var transform = this.ctx.mozCurrentTransform;
      return [
        transform[0] * x + transform[2] * y + transform[4],
        transform[1] * x + transform[3] * y + transform[5]
      ];
    }
  };

for (var op in OPS) {
    CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op];
  }

return CanvasGraphics;
})();

exports.CanvasGraphics = CanvasGraphics;
exports.createScratchCanvas = createScratchCanvas;
}));

(function (root, factory) {
  {
    factory((root.pdfjsDisplayAPI = {}), root.pdfjsSharedUtil,
      root.pdfjsDisplayFontLoader, root.pdfjsDisplayCanvas,
      root.pdfjsDisplayMetadata, root.pdfjsSharedGlobal);
  }
}(this, function (exports, sharedUtil, displayFontLoader, displayCanvas,
                  displayMetadata, sharedGlobal, amdRequire) {

var InvalidPDFException = sharedUtil.InvalidPDFException;
var MessageHandler = sharedUtil.MessageHandler;
var MissingPDFException = sharedUtil.MissingPDFException;
var PasswordResponses = sharedUtil.PasswordResponses;
var PasswordException = sharedUtil.PasswordException;
var StatTimer = sharedUtil.StatTimer;
var UnexpectedResponseException = sharedUtil.UnexpectedResponseException;
var UnknownErrorException = sharedUtil.UnknownErrorException;
var Util = sharedUtil.Util;
var createPromiseCapability = sharedUtil.createPromiseCapability;
var combineUrl = sharedUtil.combineUrl;
var error = sharedUtil.error;
var deprecated = sharedUtil.deprecated;
var info = sharedUtil.info;
var isArrayBuffer = sharedUtil.isArrayBuffer;
var loadJpegStream = sharedUtil.loadJpegStream;
var stringToBytes = sharedUtil.stringToBytes;
var warn = sharedUtil.warn;
var FontFaceObject = displayFontLoader.FontFaceObject;
var FontLoader = displayFontLoader.FontLoader;
var CanvasGraphics = displayCanvas.CanvasGraphics;
var createScratchCanvas = displayCanvas.createScratchCanvas;
var Metadata = displayMetadata.Metadata;
var PDFJS = sharedGlobal.PDFJS;
var globalScope = sharedGlobal.globalScope;

var DEFAULT_RANGE_CHUNK_SIZE = 65536; // 2^16 = 65536

/**
 * The maximum allowed image size in total pixels e.g. width * height. Images
 * above this value will not be drawn. Use -1 for no limit.
 * @var {number}
 */
PDFJS.maxImageSize = (PDFJS.maxImageSize === undefined ?
                      -1 : PDFJS.maxImageSize);

/**
 * The url of where the predefined Adobe CMaps are located. Include trailing
 * slash.
 * @var {string}
 */
PDFJS.cMapUrl = (PDFJS.cMapUrl === undefined ? null : PDFJS.cMapUrl);

/**
 * Specifies if CMaps are binary packed.
 * @var {boolean}
 */
PDFJS.cMapPacked = PDFJS.cMapPacked === undefined ? false : PDFJS.cMapPacked;

/**
 * By default fonts are converted to OpenType fonts and loaded via font face
 * rules. If disabled, the font will be rendered using a built in font renderer
 * that constructs the glyphs with primitive path commands.
 * @var {boolean}
 */
PDFJS.disableFontFace = (PDFJS.disableFontFace === undefined ?
                         false : PDFJS.disableFontFace);

/**
 * Path for image resources, mainly for annotation icons. Include trailing
 * slash.
 * @var {string}
 */
PDFJS.imageResourcesPath = (PDFJS.imageResourcesPath === undefined ?
                            '' : PDFJS.imageResourcesPath);

/**
 * Disable the web worker and run all code on the main thread. This will happen
 * automatically if the browser doesn't support workers or sending typed arrays
 * to workers.
 * @var {boolean}
 */
PDFJS.disableWorker = (PDFJS.disableWorker === undefined ?
                       false : PDFJS.disableWorker);

/**
 * Path and filename of the worker file. Required when the worker is enabled in
 * development mode. If unspecified in the production build, the worker will be
 * loaded based on the location of the pdf.js file. It is recommended that
 * the workerSrc is set in a custom application to prevent issues caused by
 * third-party frameworks and libraries.
 * @var {string}
 */
PDFJS.workerSrc = (PDFJS.workerSrc === undefined ? null : PDFJS.workerSrc);

/**
 * Disable range request loading of PDF files. When enabled and if the server
 * supports partial content requests then the PDF will be fetched in chunks.
 * Enabled (false) by default.
 * @var {boolean}
 */
PDFJS.disableRange = (PDFJS.disableRange === undefined ?
                      false : PDFJS.disableRange);

/**
 * Disable streaming of PDF file data. By default PDF.js attempts to load PDF
 * in chunks. This default behavior can be disabled.
 * @var {boolean}
 */
PDFJS.disableStream = (PDFJS.disableStream === undefined ?
                       false : PDFJS.disableStream);

/**
 * Disable pre-fetching of PDF file data. When range requests are enabled PDF.js
 * will automatically keep fetching more data even if it isn't needed to display
 * the current page. This default behavior can be disabled.
 *
 * NOTE: It is also necessary to disable streaming, see above,
 *       in order for disabling of pre-fetching to work correctly.
 * @var {boolean}
 */
PDFJS.disableAutoFetch = (PDFJS.disableAutoFetch === undefined ?
                          false : PDFJS.disableAutoFetch);

/**
 * Enables special hooks for debugging PDF.js.
 * @var {boolean}
 */
PDFJS.pdfBug = (PDFJS.pdfBug === undefined ? false : PDFJS.pdfBug);

/**
 * Enables transfer usage in postMessage for ArrayBuffers.
 * @var {boolean}
 */
PDFJS.postMessageTransfers = (PDFJS.postMessageTransfers === undefined ?
                              true : PDFJS.postMessageTransfers);

/**
 * Disables URL.createObjectURL usage.
 * @var {boolean}
 */
PDFJS.disableCreateObjectURL = (PDFJS.disableCreateObjectURL === undefined ?
                                false : PDFJS.disableCreateObjectURL);

/**
 * Disables WebGL usage.
 * @var {boolean}
 */
PDFJS.disableWebGL = (PDFJS.disableWebGL === undefined ?
                      true : PDFJS.disableWebGL);

/**
 * Disables fullscreen support, and by extension Presentation Mode,
 * in browsers which support the fullscreen API.
 * @var {boolean}
 */
PDFJS.disableFullscreen = (PDFJS.disableFullscreen === undefined ?
                           false : PDFJS.disableFullscreen);

/**
 * Enables CSS only zooming.
 * @var {boolean}
 */
PDFJS.useOnlyCssZoom = (PDFJS.useOnlyCssZoom === undefined ?
                        false : PDFJS.useOnlyCssZoom);

/**
 * Controls the logging level.
 * The constants from PDFJS.VERBOSITY_LEVELS should be used:
 * - errors
 * - warnings [default]
 * - infos
 * @var {number}
 */
PDFJS.verbosity = (PDFJS.verbosity === undefined ?
                   PDFJS.VERBOSITY_LEVELS.warnings : PDFJS.verbosity);

/**
 * The maximum supported canvas size in total pixels e.g. width * height.
 * The default value is 4096 * 4096. Use -1 for no limit.
 * @var {number}
 */
PDFJS.maxCanvasPixels = (PDFJS.maxCanvasPixels === undefined ?
                         16777216 : PDFJS.maxCanvasPixels);

/**
 * (Deprecated) Opens external links in a new window if enabled.
 * The default behavior opens external links in the PDF.js window.
 *
 * NOTE: This property has been deprecated, please use
 *       `PDFJS.externalLinkTarget = PDFJS.LinkTarget.BLANK` instead.
 * @var {boolean}
 */
PDFJS.openExternalLinksInNewWindow = (
  PDFJS.openExternalLinksInNewWindow === undefined ?
    false : PDFJS.openExternalLinksInNewWindow);

/**
 * Specifies the |target| attribute for external links.
 * The constants from PDFJS.LinkTarget should be used:
 *  - NONE [default]
 *  - SELF
 *  - BLANK
 *  - PARENT
 *  - TOP
 * @var {number}
 */
PDFJS.externalLinkTarget = (PDFJS.externalLinkTarget === undefined ?
                            PDFJS.LinkTarget.NONE : PDFJS.externalLinkTarget);

/**
 * Specifies the |rel| attribute for external links. Defaults to stripping
 * the referrer.
 * @var {string}
 */
PDFJS.externalLinkRel = (PDFJS.externalLinkRel === undefined ?
                         'noreferrer' : PDFJS.externalLinkRel);

/**
  * Determines if we can eval strings as JS. Primarily used to improve
  * performance for font rendering.
  * @var {boolean}
  */
PDFJS.isEvalSupported = (PDFJS.isEvalSupported === undefined ?
                         true : PDFJS.isEvalSupported);

/**
 * Document initialization / loading parameters object.
 *
 * @typedef {Object} DocumentInitParameters
 * @property {string}     url   - The URL of the PDF.
 * @property {TypedArray|Array|string} data - Binary PDF data. Use typed arrays
 *   (Uint8Array) to improve the memory usage. If PDF data is BASE64-encoded,
 *   use atob() to convert it to a binary string first.
 * @property {Object}     httpHeaders - Basic authentication headers.
 * @property {boolean}    withCredentials - Indicates whether or not cross-site
 *   Access-Control requests should be made using credentials such as cookies
 *   or authorization headers. The default is false.
 * @property {string}     password - For decrypting password-protected PDFs.
 * @property {TypedArray} initialData - A typed array with the first portion or
 *   all of the pdf data. Used by the extension since some data is already
 *   loaded before the switch to range requests.
 * @property {number}     length - The PDF file length. It's used for progress
 *   reports and range requests operations.
 * @property {PDFDataRangeTransport} range
 * @property {number}     rangeChunkSize - Optional parameter to specify
 *   maximum number of bytes fetched per range request. The default value is
 *   2^16 = 65536.
 * @property {PDFWorker}  worker - The worker that will be used for the loading
 *   and parsing of the PDF data.
 */

/**
 * @typedef {Object} PDFDocumentStats
 * @property {Array} streamTypes - Used stream types in the document (an item
 *   is set to true if specific stream ID was used in the document).
 * @property {Array} fontTypes - Used font type in the document (an item is set
 *   to true if specific font ID was used in the document).
 */

/**
 * This is the main entry point for loading a PDF and interacting with it.
 * NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR)
 * is used, which means it must follow the same origin rules that any XHR does
 * e.g. No cross domain requests without CORS.
 *
 * @param {string|TypedArray|DocumentInitParameters|PDFDataRangeTransport} src
 * Can be a url to where a PDF is located, a typed array (Uint8Array)
 * already populated with data or parameter object.
 *
 * @param {PDFDataRangeTransport} pdfDataRangeTransport (deprecated) It is used
 * if you want to manually serve range requests for data in the PDF.
 *
 * @param {function} passwordCallback (deprecated) It is used to request a
 * password if wrong or no password was provided. The callback receives two
 * parameters: function that needs to be called with new password and reason
 * (see {PasswordResponses}).
 *
 * @param {function} progressCallback (deprecated) It is used to be able to
 * monitor the loading progress of the PDF file (necessary to implement e.g.
 * a loading bar). The callback receives an {Object} with the properties:
 * {number} loaded and {number} total.
 *
 * @return {PDFDocumentLoadingTask}
 */
PDFJS.getDocument = function getDocument(src,
                                         pdfDataRangeTransport,
                                         passwordCallback,
                                         progressCallback) {
  var task = new PDFDocumentLoadingTask();

// Support of the obsolete arguments (for compatibility with API v1.0)
  if (arguments.length > 1) {
    deprecated('getDocument is called with pdfDataRangeTransport, ' +
               'passwordCallback or progressCallback argument');
  }
  if (pdfDataRangeTransport) {
    if (!(pdfDataRangeTransport instanceof PDFDataRangeTransport)) {
      // Not a PDFDataRangeTransport instance, trying to add missing properties.
      pdfDataRangeTransport = Object.create(pdfDataRangeTransport);
      pdfDataRangeTransport.length = src.length;
      pdfDataRangeTransport.initialData = src.initialData;
      if (!pdfDataRangeTransport.abort) {
        pdfDataRangeTransport.abort = function () {};
      }
    }
    src = Object.create(src);
    src.range = pdfDataRangeTransport;
  }
  task.onPassword = passwordCallback || null;
  task.onProgress = progressCallback || null;

var source;
  if (typeof src === 'string') {
    source = { url: src };
  } else if (isArrayBuffer(src)) {
    source = { data: src };
  } else if (src instanceof PDFDataRangeTransport) {
    source = { range: src };
  } else {
    if (typeof src !== 'object') {
      error('Invalid parameter in getDocument, need either Uint8Array, ' +
        'string or a parameter object');
    }
    if (!src.url && !src.data && !src.range) {
      error('Invalid parameter object: need either .data, .range or .url');
    }

source = src;
  }

params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE;

if (!worker) {
    // Worker was not provided -- creating and owning our own.
    worker = new PDFWorker();
    task._worker = worker;
  }
  var docId = task.docId;
  worker.promise.then(function () {
    if (task.destroyed) {
      throw new Error('Loading aborted');
    }
    return _fetchDocument(worker, params, rangeTransport, docId).then(
        function (workerId) {
      if (task.destroyed) {
        throw new Error('Loading aborted');
      }
      var messageHandler = new MessageHandler(docId, workerId, worker.port);
      messageHandler.send('Ready', null);
      var transport = new WorkerTransport(messageHandler, task, rangeTransport);
      task._transport = transport;
    });
  }).catch(task._capability.reject);

return task;
};

/**
 * Starts fetching of specified PDF document/data.
 * @param {PDFWorker} worker
 * @param {Object} source
 * @param {PDFDataRangeTransport} pdfDataRangeTransport
 * @param {string} docId Unique document id, used as MessageHandler id.
 * @returns {Promise} The promise, which is resolved when worker id of
 *                    MessageHandler is known.
 * @private
 */
function _fetchDocument(worker, source, pdfDataRangeTransport, docId) {
  if (worker.destroyed) {
    return Promise.reject(new Error('Worker was destroyed'));
  }

source.disableAutoFetch = PDFJS.disableAutoFetch;
  source.disableStream = PDFJS.disableStream;
  source.chunkedViewerLoading = !!pdfDataRangeTransport;
  if (pdfDataRangeTransport) {
    source.length = pdfDataRangeTransport.length;
    source.initialData = pdfDataRangeTransport.initialData;
  }
  return worker.messageHandler.sendWithPromise('GetDocRequest', {
    docId: docId,
    source: source,
    disableRange: PDFJS.disableRange,
    maxImageSize: PDFJS.maxImageSize,
    cMapUrl: PDFJS.cMapUrl,
    cMapPacked: PDFJS.cMapPacked,
    disableFontFace: PDFJS.disableFontFace,
    disableCreateObjectURL: PDFJS.disableCreateObjectURL,
    verbosity: PDFJS.verbosity
  }).then(function (workerId) {
    if (worker.destroyed) {
      throw new Error('Worker was destroyed');
    }
    return workerId;
  });
}

/**
 * PDF document loading operation.
 * @class
 * @alias PDFDocumentLoadingTask
 */
var PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() {
  var nextDocumentId = 0;

/** @constructs PDFDocumentLoadingTask */
  function PDFDocumentLoadingTask() {
    this._capability = createPromiseCapability();
    this._transport = null;
    this._worker = null;

/**
     * Unique document loading task id -- used in MessageHandlers.
     * @type {string}
     */
    this.docId = 'd' + (nextDocumentId++);

/**
     * Shows if loading task is destroyed.
     * @type {boolean}
     */
    this.destroyed = false;

/**
     * Callback to request a password if wrong or no password was provided.
     * The callback receives two parameters: function that needs to be called
     * with new password and reason (see {PasswordResponses}).
     */
    this.onPassword = null;

/**
     * Callback to be able to monitor the loading progress of the PDF file
     * (necessary to implement e.g. a loading bar). The callback receives
     * an {Object} with the properties: {number} loaded and {number} total.
     */
    this.onProgress = null;

/**
     * Callback to when unsupported feature is used. The callback receives
     * an {PDFJS.UNSUPPORTED_FEATURES} argument.
     */
    this.onUnsupportedFeature = null;
  }

PDFDocumentLoadingTask.prototype =
      /** @lends PDFDocumentLoadingTask.prototype */ {
    /**
     * @return {Promise}
     */
    get promise() {
      return this._capability.promise;
    },

/**
     * Aborts all network requests and destroys worker.
     * @return {Promise} A promise that is resolved after destruction activity
     *                   is completed.
     */
    destroy: function () {
      this.destroyed = true;

var transportDestroyed = !this._transport ? Promise.resolve() :
        this._transport.destroy();
      return transportDestroyed.then(function () {
        this._transport = null;
        if (this._worker) {
          this._worker.destroy();
          this._worker = null;
        }
      }.bind(this));
    },

/**
     * Registers callbacks to indicate the document loading completion.
     *
     * @param {function} onFulfilled The callback for the loading completion.
     * @param {function} onRejected The callback for the loading failure.
     * @return {Promise} A promise that is resolved after the onFulfilled or
     *                   onRejected callback.
     */
    then: function PDFDocumentLoadingTask_then(onFulfilled, onRejected) {
      return this.promise.then.apply(this.promise, arguments);
    }
  };

return PDFDocumentLoadingTask;
})();

/**
 * Abstract class to support range requests file loading.
 * @class
 * @alias PDFJS.PDFDataRangeTransport
 * @param {number} length
 * @param {Uint8Array} initialData
 */
var PDFDataRangeTransport = (function pdfDataRangeTransportClosure() {
  function PDFDataRangeTransport(length, initialData) {
    this.length = length;
    this.initialData = initialData;

this._rangeListeners = [];
    this._progressListeners = [];
    this._progressiveReadListeners = [];
    this._readyCapability = createPromiseCapability();
  }
  PDFDataRangeTransport.prototype =
      /** @lends PDFDataRangeTransport.prototype */ {
    addRangeListener:
        function PDFDataRangeTransport_addRangeListener(listener) {
      this._rangeListeners.push(listener);
    },

addProgressListener:
        function PDFDataRangeTransport_addProgressListener(listener) {
      this._progressListeners.push(listener);
    },

addProgressiveReadListener:
        function PDFDataRangeTransport_addProgressiveReadListener(listener) {
      this._progressiveReadListeners.push(listener);
    },

onDataRange: function PDFDataRangeTransport_onDataRange(begin, chunk) {
      var listeners = this._rangeListeners;
      for (var i = 0, n = listeners.length; i < n; ++i) {
        listeners[i](begin, chunk);
      }
    },

onDataProgress: function PDFDataRangeTransport_onDataProgress(loaded) {
      this._readyCapability.promise.then(function () {
        var listeners = this._progressListeners;
        for (var i = 0, n = listeners.length; i < n; ++i) {
          listeners[i](loaded);
        }
      }.bind(this));
    },

onDataProgressiveRead:
        function PDFDataRangeTransport_onDataProgress(chunk) {
      this._readyCapability.promise.then(function () {
        var listeners = this._progressiveReadListeners;
        for (var i = 0, n = listeners.length; i < n; ++i) {
          listeners[i](chunk);
        }
      }.bind(this));
    },

transportReady: function PDFDataRangeTransport_transportReady() {
      this._readyCapability.resolve();
    },

requestDataRange:
        function PDFDataRangeTransport_requestDataRange(begin, end) {
      throw new Error('Abstract method PDFDataRangeTransport.requestDataRange');
    },

abort: function PDFDataRangeTransport_abort() {
    }
  };
  return PDFDataRangeTransport;
})();

PDFJS.PDFDataRangeTransport = PDFDataRangeTransport;

/**
 * Proxy to a PDFDocument in the worker thread. Also, contains commonly used
 * properties that can be read synchronously.
 * @class
 * @alias PDFDocumentProxy
 */
var PDFDocumentProxy = (function PDFDocumentProxyClosure() {
  function PDFDocumentProxy(pdfInfo, transport, loadingTask) {
    this.pdfInfo = pdfInfo;
    this.transport = transport;
    this.loadingTask = loadingTask;
  }
  PDFDocumentProxy.prototype = /** @lends PDFDocumentProxy.prototype */ {
    /**
     * @return {number} Total number of pages the PDF contains.
     */
    get numPages() {
      return this.pdfInfo.numPages;
    },
    /**
     * @return {string} A unique ID to identify a PDF. Not guaranteed to be
     * unique.
     */
    get fingerprint() {
      return this.pdfInfo.fingerprint;
    },
    /**
     * @param {number} pageNumber The page number to get. The first page is 1.
     * @return {Promise} A promise that is resolved with a {@link PDFPageProxy}
     * object.
     */
    getPage: function PDFDocumentProxy_getPage(pageNumber) {
      return this.transport.getPage(pageNumber);
    },
    /**
     * @param {{num: number, gen: number}} ref The page reference. Must have
     *   the 'num' and 'gen' properties.
     * @return {Promise} A promise that is resolved with the page index that is
     * associated with the reference.
     */
    getPageIndex: function PDFDocumentProxy_getPageIndex(ref) {
      return this.transport.getPageIndex(ref);
    },
    /**
     * @return {Promise} A promise that is resolved with a lookup table for
     * mapping named destinations to reference numbers.
     *
     * This can be slow for large documents: use getDestination instead
     */
    getDestinations: function PDFDocumentProxy_getDestinations() {
      return this.transport.getDestinations();
    },
    /**
     * @param {string} id The named destination to get.
     * @return {Promise} A promise that is resolved with all information
     * of the given named destination.
     */
    getDestination: function PDFDocumentProxy_getDestination(id) {
      return this.transport.getDestination(id);
    },
    /**
     * @return {Promise} A promise that is resolved with:
     *   an Array containing the pageLabels that correspond to the pageIndexes,
     *   or `null` when no pageLabels are present in the PDF file.
     */
    getPageLabels: function PDFDocumentProxy_getPageLabels() {
      return this.transport.getPageLabels();
    },
    /**
     * @return {Promise} A promise that is resolved with a lookup table for
     * mapping named attachments to their content.
     */
    getAttachments: function PDFDocumentProxy_getAttachments() {
      return this.transport.getAttachments();
    },
    /**
     * @return {Promise} A promise that is resolved with an array of all the
     * JavaScript strings in the name tree.
     */
    getJavaScript: function PDFDocumentProxy_getJavaScript() {
      return this.transport.getJavaScript();
    },
    /**
     * @return {Promise} A promise that is resolved with an {Array} that is a
     * tree outline (if it has one) of the PDF. The tree is in the format of:
     * [
     *  {
     *   title: string,
     *   bold: boolean,
     *   italic: boolean,
     *   color: rgb array,
     *   dest: dest obj,
     *   url: string,
     *   items: array of more items like this
     *  },
     *  ...
     * ].
     */
    getOutline: function PDFDocumentProxy_getOutline() {
      return this.transport.getOutline();
    },
    /**
     * @return {Promise} A promise that is resolved with an {Object} that has
     * info and metadata properties.  Info is an {Object} filled with anything
     * available in the information dictionary and similarly metadata is a
     * {Metadata} object with information from the metadata section of the PDF.
     */
    getMetadata: function PDFDocumentProxy_getMetadata() {
      return this.transport.getMetadata();
    },
    /**
     * @return {Promise} A promise that is resolved with a TypedArray that has
     * the raw data from the PDF.
     */
    getData: function PDFDocumentProxy_getData() {
      return this.transport.getData();
    },
    /**
     * @return {Promise} A promise that is resolved when the document's data
     * is loaded. It is resolved with an {Object} that contains the length
     * property that indicates size of the PDF data in bytes.
     */
    getDownloadInfo: function PDFDocumentProxy_getDownloadInfo() {
      return this.transport.downloadInfoCapability.promise;
    },
    /**
     * @return {Promise} A promise this is resolved with current stats about
     * document structures (see {@link PDFDocumentStats}).
     */
    getStats: function PDFDocumentProxy_getStats() {
      return this.transport.getStats();
    },
    /**
     * Cleans up resources allocated by the document, e.g. created @font-face.
     */
    cleanup: function PDFDocumentProxy_cleanup() {
      this.transport.startCleanup();
    },
    /**
     * Destroys current document instance and terminates worker.
     */
    destroy: function PDFDocumentProxy_destroy() {
      return this.loadingTask.destroy();
    }
  };
  return PDFDocumentProxy;
})();

/**
 * Page getTextContent parameters.
 *
 * @typedef {Object} getTextContentParameters
 * @param {boolean} normalizeWhitespace - replaces all occurrences of
 *   whitespace with standard spaces (0x20). The default value is `false`.
 */

/**
 * Page text content.
 *
 * @typedef {Object} TextContent
 * @property {array} items - array of {@link TextItem}
 * @property {Object} styles - {@link TextStyles} objects, indexed by font
 *                    name.
 */

/**
 * Page text content part.
 *
 * @typedef {Object} TextItem
 * @property {string} str - text content.
 * @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'.
 * @property {array} transform - transformation matrix.
 * @property {number} width - width in device space.
 * @property {number} height - height in device space.
 * @property {string} fontName - font name used by pdf.js for converted font.
 */

/**
 * Text style.
 *
 * @typedef {Object} TextStyle
 * @property {number} ascent - font ascent.
 * @property {number} descent - font descent.
 * @property {boolean} vertical - text is in vertical mode.
 * @property {string} fontFamily - possible font family
 */

/**
 * Page annotation parameters.
 *
 * @typedef {Object} GetAnnotationsParameters
 * @param {string} intent - Determines the annotations that will be fetched,
 *                 can be either 'display' (viewable annotations) or 'print'
 *                 (printable annotations).
 *                 If the parameter is omitted, all annotations are fetched.
 */

/**
 * Page render parameters.
 *
 * @typedef {Object} RenderParameters
 * @property {Object} canvasContext - A 2D context of a DOM Canvas object.
 * @property {PDFJS.PageViewport} viewport - Rendering viewport obtained by
 *                                calling of PDFPage.getViewport method.
 * @property {string} intent - Rendering intent, can be 'display' or 'print'
 *                    (default value is 'display').
 * @property {Array}  transform - (optional) Additional transform, applied
 *                    just before viewport transform.
 * @property {Object} imageLayer - (optional) An object that has beginLayout,
 *                    endLayout and appendImage functions.
 * @property {function} continueCallback - (deprecated) A function that will be
 *                      called each time the rendering is paused.  To continue
 *                      rendering call the function that is the first argument
 *                      to the callback.
 */

/**
 * PDF page operator list.
 *
 * @typedef {Object} PDFOperatorList
 * @property {Array} fnArray - Array containing the operator functions.
 * @property {Array} argsArray - Array containing the arguments of the
 *                               functions.
 */

/**
 * Proxy to a PDFPage in the worker thread.
 * @class
 * @alias PDFPageProxy
 */
var PDFPageProxy = (function PDFPageProxyClosure() {
  function PDFPageProxy(pageIndex, pageInfo, transport) {
    this.pageIndex = pageIndex;
    this.pageInfo = pageInfo;
    this.transport = transport;
    this.stats = new StatTimer();
    this.stats.enabled = !!globalScope.PDFJS.enableStats;
    this.commonObjs = transport.commonObjs;
    this.objs = new PDFObjects();
    this.cleanupAfterRender = false;
    this.pendingCleanup = false;
    this.intentStates = {};
    this.destroyed = false;
  }
  PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */ {
    /**
     * @return {number} Page number of the page. First page is 1.
     */
    get pageNumber() {
      return this.pageIndex + 1;
    },
    /**
     * @return {number} The number of degrees the page is rotated clockwise.
     */
    get rotate() {
      return this.pageInfo.rotate;
    },
    /**
     * @return {Object} The reference that points to this page. It has 'num' and
     * 'gen' properties.
     */
    get ref() {
      return this.pageInfo.ref;
    },
    /**
     * @return {Array} An array of the visible portion of the PDF page in the
     * user space units - [x1, y1, x2, y2].
     */
    get view() {
      return this.pageInfo.view;
    },
    /**
     * @param {number} scale The desired scale of the viewport.
     * @param {number} rotate Degrees to rotate the viewport. If omitted this
     * defaults to the page rotation.
     * @return {PDFJS.PageViewport} Contains 'width' and 'height' properties
     * along with transforms required for rendering.
     */
    getViewport: function PDFPageProxy_getViewport(scale, rotate) {
      if (arguments.length < 2) {
        rotate = this.rotate;
      }
      return new PDFJS.PageViewport(this.view, scale, rotate, 0, 0);
    },
    /**
     * @param {GetAnnotationsParameters} params - Annotation parameters.
     * @return {Promise} A promise that is resolved with an {Array} of the
     * annotation objects.
     */
    getAnnotations: function PDFPageProxy_getAnnotations(params) {
      var intent = (params && params.intent) || null;

if (!this.annotationsPromise || this.annotationsIntent !== intent) {
        this.annotationsPromise = this.transport.getAnnotations(this.pageIndex,
                                                                intent);
        this.annotationsIntent = intent;
      }
      return this.annotationsPromise;
    },
    /**
     * Begins the process of rendering a page to the desired context.
     * @param {RenderParameters} params Page render parameters.
     * @return {RenderTask} An object that contains the promise, which
     *                      is resolved when the page finishes rendering.
     */
    render: function PDFPageProxy_render(params) {
      var stats = this.stats;
      stats.time('Overall');

// If there was a pending destroy cancel it so no cleanup happens during
      // this call to render.
      this.pendingCleanup = false;

var renderingIntent = (params.intent === 'print' ? 'print' : 'display');

if (!this.intentStates[renderingIntent]) {
        this.intentStates[renderingIntent] = {};
      }
      var intentState = this.intentStates[renderingIntent];

// If there's no displayReadyCapability yet, then the operatorList
      // was never requested before. Make the request and create the promise.
      if (!intentState.displayReadyCapability) {
        intentState.receivingOperatorList = true;
        intentState.displayReadyCapability = createPromiseCapability();
        intentState.operatorList = {
          fnArray: [],
          argsArray: [],
          lastChunk: false
        };

this.stats.time('Page Request');
        this.transport.messageHandler.send('RenderPageRequest', {
          pageIndex: this.pageNumber - 1,
          intent: renderingIntent
        });
      }

var internalRenderTask = new InternalRenderTask(complete, params,
                                                      this.objs,
                                                      this.commonObjs,
                                                      intentState.operatorList,
                                                      this.pageNumber);
      internalRenderTask.useRequestAnimationFrame = renderingIntent !== 'print';
      if (!intentState.renderTasks) {
        intentState.renderTasks = [];
      }
      intentState.renderTasks.push(internalRenderTask);
      var renderTask = internalRenderTask.task;

// Obsolete parameter support
      if (params.continueCallback) {
        deprecated('render is used with continueCallback parameter');
        renderTask.onContinue = params.continueCallback;
      }

function complete(error) {
        var i = intentState.renderTasks.indexOf(internalRenderTask);
        if (i >= 0) {
          intentState.renderTasks.splice(i, 1);
        }

if (self.cleanupAfterRender) {
          self.pendingCleanup = true;
        }
        self._tryCleanup();

if (error) {
          internalRenderTask.capability.reject(error);
        } else {
          internalRenderTask.capability.resolve();
        }
        stats.timeEnd('Rendering');
        stats.timeEnd('Overall');
      }

return renderTask;
    },

/**
     * @return {Promise} A promise resolved with an {@link PDFOperatorList}
     * object that represents page's operator list.
     */
    getOperatorList: function PDFPageProxy_getOperatorList() {
      function operatorListChanged() {
        if (intentState.operatorList.lastChunk) {
          intentState.opListReadCapability.resolve(intentState.operatorList);
        }
      }

var renderingIntent = 'oplist';
      if (!this.intentStates[renderingIntent]) {
        this.intentStates[renderingIntent] = {};
      }
      var intentState = this.intentStates[renderingIntent];

if (!intentState.opListReadCapability) {
        var opListTask = {};
        opListTask.operatorListChanged = operatorListChanged;
        intentState.receivingOperatorList = true;
        intentState.opListReadCapability = createPromiseCapability();
        intentState.renderTasks = [];
        intentState.renderTasks.push(opListTask);
        intentState.operatorList = {
          fnArray: [],
          argsArray: [],
          lastChunk: false
        };

this.transport.messageHandler.send('RenderPageRequest', {
          pageIndex: this.pageIndex,
          intent: renderingIntent
        });
      }
      return intentState.opListReadCapability.promise;
    },

/**
     * @param {getTextContentParameters} params - getTextContent parameters.
     * @return {Promise} That is resolved a {@link TextContent}
     * object that represent the page text content.
     */
    getTextContent: function PDFPageProxy_getTextContent(params) {
      var normalizeWhitespace = (params && params.normalizeWhitespace) || false;

return this.transport.messageHandler.sendWithPromise('GetTextContent', {
        pageIndex: this.pageNumber - 1,
        normalizeWhitespace: normalizeWhitespace,
      });
    },

/**
     * Destroys page object.
     */
    _destroy: function PDFPageProxy_destroy() {
      this.destroyed = true;
      this.transport.pageCache[this.pageIndex] = null;

/**
     * Cleans up resources allocated by the page. (deprecated)
     */
    destroy: function() {
      deprecated('page destroy method, use cleanup() instead');
      this.cleanup();
    },

/**
     * Cleans up resources allocated by the page.
     */
    cleanup: function PDFPageProxy_cleanup() {
      this.pendingCleanup = true;
      this._tryCleanup();
    },
    /**
     * For internal use only. Attempts to clean up if rendering is in a state
     * where that's possible.
     * @ignore
     */
    _tryCleanup: function PDFPageProxy_tryCleanup() {
      if (!this.pendingCleanup ||
          Object.keys(this.intentStates).some(function(intent) {
            var intentState = this.intentStates[intent];
            return (intentState.renderTasks.length !== 0 ||
                    intentState.receivingOperatorList);
          }, this)) {
        return;
      }

Object.keys(this.intentStates).forEach(function(intent) {
        delete this.intentStates[intent];
      }, this);
      this.objs.clear();
      this.annotationsPromise = null;
      this.pendingCleanup = false;
    },
    /**
     * For internal use only.
     * @ignore
     */
    _startRenderPage: function PDFPageProxy_startRenderPage(transparency,
                                                            intent) {
      var intentState = this.intentStates[intent];
      // TODO Refactor RenderPageRequest to separate rendering
      // and operator list logic
      if (intentState.displayReadyCapability) {
        intentState.displayReadyCapability.resolve(transparency);
      }
    },
    /**
     * For internal use only.
     * @ignore
     */
    _renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk,
                                                            intent) {
      var intentState = this.intentStates[intent];
      var i, ii;
      // Add the new chunk to the current operator list.
      for (i = 0, ii = operatorListChunk.length; i < ii; i++) {
        intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]);
        intentState.operatorList.argsArray.push(
          operatorListChunk.argsArray[i]);
      }
      intentState.operatorList.lastChunk = operatorListChunk.lastChunk;

// Notify all the rendering tasks there are more operators to be consumed.
      for (i = 0; i < intentState.renderTasks.length; i++) {
        intentState.renderTasks[i].operatorListChanged();
      }

if (operatorListChunk.lastChunk) {
        intentState.receivingOperatorList = false;
        this._tryCleanup();
      }
    }
  };
  return PDFPageProxy;
})();

/**
 * PDF.js web worker abstraction, it controls instantiation of PDF documents and
 * WorkerTransport for them.  If creation of a web worker is not possible,
 * a "fake" worker will be used instead.
 * @class
 */
var PDFWorker = (function PDFWorkerClosure() {
  var nextFakeWorkerId = 0;

// Loads worker code into main thread.
  function setupFakeWorkerGlobal() {
    if (!PDFJS.fakeWorkerFilesLoadedCapability) {
      PDFJS.fakeWorkerFilesLoadedCapability = createPromiseCapability();
      // In the developer build load worker_loader which in turn loads all the
      // other files and resolves the promise. In production only the
      // pdf.worker.js file is needed.
      var loader = fakeWorkerFilesLoader || function (callback) {
        Util.loadScript(getWorkerSrc(), callback);
      };
      loader(function () {
        PDFJS.fakeWorkerFilesLoadedCapability.resolve();
      });
    }
    return PDFJS.fakeWorkerFilesLoadedCapability.promise;
  }

function PDFWorker(name) {
    this.name = name;
    this.destroyed = false;

this._readyCapability = createPromiseCapability();
    this._port = null;
    this._webWorker = null;
    this._messageHandler = null;
    this._initialize();
  }

PDFWorker.prototype =  /** @lends PDFWorker.prototype */ {
    get promise() {
      return this._readyCapability.promise;
    },

get port() {
      return this._port;
    },

get messageHandler() {
      return this._messageHandler;
    },

_initialize: function PDFWorker_initialize() {
      // If worker support isn't disabled explicit and the browser has worker
      // support, create a new web worker and test if it/the browser fullfills
      // all requirements to run parts of pdf.js in a web worker.
      // Right now, the requirement is, that an Uint8Array is still an
      // Uint8Array as it arrives on the worker. (Chrome added this with v.15.)
      if (!globalScope.PDFJS.disableWorker && typeof Worker !== 'undefined') {
        var workerSrc = getWorkerSrc();

try {
          // Some versions of FF can't create a worker on localhost, see:
          // https://bugzilla.mozilla.org/show_bug.cgi?id=683280
          var worker = new Worker(workerSrc);
          var messageHandler = new MessageHandler('main', 'worker', worker);
          messageHandler.on('test', function PDFWorker_test(data) {
            if (this.destroyed) {
              this._readyCapability.reject(new Error('Worker was destroyed'));
              messageHandler.destroy();
              worker.terminate();
              return; // worker was destroyed
            }
            var supportTypedArray = data && data.supportTypedArray;
            if (supportTypedArray) {
              this._messageHandler = messageHandler;
              this._port = worker;
              this._webWorker = worker;
              if (!data.supportTransfers) {
                PDFJS.postMessageTransfers = false;
              }
              this._readyCapability.resolve();
            } else {
              this._setupFakeWorker();
              messageHandler.destroy();
              worker.terminate();
            }
          }.bind(this));

messageHandler.on('console_log', function (data) {
            console.log.apply(console, data);
          });
          messageHandler.on('console_error', function (data) {
            console.error.apply(console, data);
          });

messageHandler.on('ready', function (data) {
            if (this.destroyed) {
              this._readyCapability.reject(new Error('Worker was destroyed'));
              messageHandler.destroy();
              worker.terminate();
              return; // worker was destroyed
            }
            try {
              sendTest();
            } catch (e)  {
              // We need fallback to a faked worker.
              this._setupFakeWorker();
            }
          }.bind(this));

// It might take time for worker to initialize (especially when AMD
          // loader is used). We will try to send test immediately, and then
          // when 'ready' message will arrive. The worker shall process only
          // first received 'test'.
          sendTest();
          return;
        } catch (e) {
          info('The worker has been disabled.');
        }
      }
      // Either workers are disabled, not supported or have thrown an exception.
      // Thus, we fallback to a faked worker.
      this._setupFakeWorker();
    },

_setupFakeWorker: function PDFWorker_setupFakeWorker() {
      if (!globalScope.PDFJS.disableWorker) {
        warn('Setting up fake worker.');
        globalScope.PDFJS.disableWorker = true;
      }

setupFakeWorkerGlobal().then(function () {
        if (this.destroyed) {
          this._readyCapability.reject(new Error('Worker was destroyed'));
          return;
        }

// If we don't use a worker, just post/sendMessage to the main thread.
        var port = {
          _listeners: [],
          postMessage: function (obj) {
            var e = {data: obj};
            this._listeners.forEach(function (listener) {
              listener.call(this, e);
            }, this);
          },
          addEventListener: function (name, listener) {
            this._listeners.push(listener);
          },
          removeEventListener: function (name, listener) {
            var i = this._listeners.indexOf(listener);
            this._listeners.splice(i, 1);
          },
          terminate: function () {}
        };
        this._port = port;

// All fake workers use the same port, making id unique.
        var id = 'fake' + (nextFakeWorkerId++);

// If the main thread is our worker, setup the handling for the
        // messages -- the main thread sends to it self.
        var workerHandler = new MessageHandler(id + '_worker', id, port);
        PDFJS.WorkerMessageHandler.setup(workerHandler, port);

var messageHandler = new MessageHandler(id, id + '_worker', port);
        this._messageHandler = messageHandler;
        this._readyCapability.resolve();
      }.bind(this));
    },

/**
     * Destroys the worker instance.
     */
    destroy: function PDFWorker_destroy() {
      this.destroyed = true;
      if (this._webWorker) {
        // We need to terminate only web worker created resource.
        this._webWorker.terminate();
        this._webWorker = null;
      }
      this._port = null;
      if (this._messageHandler) {
        this._messageHandler.destroy();
        this._messageHandler = null;
      }
    }
  };

return PDFWorker;
})();
PDFJS.PDFWorker = PDFWorker;

/**
 * For internal use only.
 * @ignore
 */
var WorkerTransport = (function WorkerTransportClosure() {
  function WorkerTransport(messageHandler, loadingTask, pdfDataRangeTransport) {
    this.messageHandler = messageHandler;
    this.loadingTask = loadingTask;
    this.pdfDataRangeTransport = pdfDataRangeTransport;
    this.commonObjs = new PDFObjects();
    this.fontLoader = new FontLoader(loadingTask.docId);

this.destroyed = false;
    this.destroyCapability = null;

this.pageCache = [];
    this.pagePromises = [];
    this.downloadInfoCapability = createPromiseCapability();

this.setupMessageHandler();
  }
  WorkerTransport.prototype = {
    destroy: function WorkerTransport_destroy() {
      if (this.destroyCapability) {
        return this.destroyCapability.promise;
      }

this.destroyed = true;
      this.destroyCapability = createPromiseCapability();

setupMessageHandler:
      function WorkerTransport_setupMessageHandler() {
      var messageHandler = this.messageHandler;

function updatePassword(password) {
        messageHandler.send('UpdatePassword', password);
      }

var pdfDataRangeTransport = this.pdfDataRangeTransport;
      if (pdfDataRangeTransport) {
        pdfDataRangeTransport.addRangeListener(function(begin, chunk) {
          messageHandler.send('OnDataRange', {
            begin: begin,
            chunk: chunk
          });
        });

pdfDataRangeTransport.addProgressListener(function(loaded) {
          messageHandler.send('OnDataProgress', {
            loaded: loaded
          });
        });

pdfDataRangeTransport.addProgressiveReadListener(function(chunk) {
          messageHandler.send('OnDataRange', {
            chunk: chunk
          });
        });

messageHandler.on('RequestDataRange',
          function transportDataRange(data) {
            pdfDataRangeTransport.requestDataRange(data.begin, data.end);
          }, this);
      }

messageHandler.on('GetDoc', function transportDoc(data) {
        var pdfInfo = data.pdfInfo;
        this.numPages = data.pdfInfo.numPages;
        var loadingTask = this.loadingTask;
        var pdfDocument = new PDFDocumentProxy(pdfInfo, this, loadingTask);
        this.pdfDocument = pdfDocument;
        loadingTask._capability.resolve(pdfDocument);
      }, this);

messageHandler.on('NeedPassword',
                        function transportNeedPassword(exception) {
        var loadingTask = this.loadingTask;
        if (loadingTask.onPassword) {
          return loadingTask.onPassword(updatePassword,
                                        PasswordResponses.NEED_PASSWORD);
        }
        loadingTask._capability.reject(
          new PasswordException(exception.message, exception.code));
      }, this);

messageHandler.on('IncorrectPassword',
                        function transportIncorrectPassword(exception) {
        var loadingTask = this.loadingTask;
        if (loadingTask.onPassword) {
          return loadingTask.onPassword(updatePassword,
                                        PasswordResponses.INCORRECT_PASSWORD);
        }
        loadingTask._capability.reject(
          new PasswordException(exception.message, exception.code));
      }, this);

messageHandler.on('InvalidPDF', function transportInvalidPDF(exception) {
        this.loadingTask._capability.reject(
          new InvalidPDFException(exception.message));
      }, this);

messageHandler.on('MissingPDF', function transportMissingPDF(exception) {
        this.loadingTask._capability.reject(
          new MissingPDFException(exception.message));
      }, this);

messageHandler.on('UnexpectedResponse',
                        function transportUnexpectedResponse(exception) {
        this.loadingTask._capability.reject(
          new UnexpectedResponseException(exception.message, exception.status));
      }, this);

messageHandler.on('UnknownError',
                        function transportUnknownError(exception) {
        this.loadingTask._capability.reject(
          new UnknownErrorException(exception.message, exception.details));
      }, this);

messageHandler.on('DataLoaded', function transportPage(data) {
        this.downloadInfoCapability.resolve(data);
      }, this);

messageHandler.on('PDFManagerReady', function transportPage(data) {
        if (this.pdfDataRangeTransport) {
          this.pdfDataRangeTransport.transportReady();
        }
      }, this);

messageHandler.on('StartRenderPage', function transportRender(data) {
        if (this.destroyed) {
          return; // Ignore any pending requests if the worker was terminated.
        }
        var page = this.pageCache[data.pageIndex];

page.stats.timeEnd('Page Request');
        page._startRenderPage(data.transparency, data.intent);
      }, this);

messageHandler.on('RenderPageChunk', function transportRender(data) {
        if (this.destroyed) {
          return; // Ignore any pending requests if the worker was terminated.
        }
        var page = this.pageCache[data.pageIndex];

page._renderPageChunk(data.operatorList, data.intent);
      }, this);

messageHandler.on('commonobj', function transportObj(data) {
        if (this.destroyed) {
          return; // Ignore any pending requests if the worker was terminated.
        }

var id = data[0];
        var type = data[1];
        if (this.commonObjs.hasData(id)) {
          return;
        }

switch (type) {
          case 'Font':
            var exportedData = data[2];

var font;
            if ('error' in exportedData) {
              var error = exportedData.error;
              warn('Error during font loading: ' + error);
              this.commonObjs.resolve(id, error);
              break;
            } else {
              font = new FontFaceObject(exportedData);
            }

this.fontLoader.bind(
              [font],
              function fontReady(fontObjs) {
                this.commonObjs.resolve(id, font);
              }.bind(this)
            );
            break;
          case 'FontPath':
            this.commonObjs.resolve(id, data[2]);
            break;
          default:
            error('Got unknown common object type ' + type);
        }
      }, this);

messageHandler.on('obj', function transportObj(data) {
        if (this.destroyed) {
          return; // Ignore any pending requests if the worker was terminated.
        }

var id = data[0];
        var pageIndex = data[1];
        var type = data[2];
        var pageProxy = this.pageCache[pageIndex];
        var imageData;
        if (pageProxy.objs.hasData(id)) {
          return;
        }

switch (type) {
          case 'JpegStream':
            imageData = data[3];
            loadJpegStream(id, imageData, pageProxy.objs);
            break;
          case 'Image':
            imageData = data[3];
            pageProxy.objs.resolve(id, imageData);

// heuristics that will allow not to store large data
            var MAX_IMAGE_SIZE_TO_STORE = 8000000;
            if (imageData && 'data' in imageData &&
                imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) {
              pageProxy.cleanupAfterRender = true;
            }
            break;
          default:
            error('Got unknown object type ' + type);
        }
      }, this);

messageHandler.on('DocProgress', function transportDocProgress(data) {
        if (this.destroyed) {
          return; // Ignore any pending requests if the worker was terminated.
        }

var loadingTask = this.loadingTask;
        if (loadingTask.onProgress) {
          loadingTask.onProgress({
            loaded: data.loaded,
            total: data.total
          });
        }
      }, this);

messageHandler.on('PageError', function transportError(data) {
        if (this.destroyed) {
          return; // Ignore any pending requests if the worker was terminated.
        }

var page = this.pageCache[data.pageNum - 1];
        var intentState = page.intentStates[data.intent];
        if (intentState.displayReadyCapability) {
          intentState.displayReadyCapability.reject(data.error);
        } else {
          error(data.error);
        }
      }, this);

messageHandler.on('UnsupportedFeature',
          function transportUnsupportedFeature(data) {
        if (this.destroyed) {
          return; // Ignore any pending requests if the worker was terminated.
        }
        var featureId = data.featureId;
        var loadingTask = this.loadingTask;
        if (loadingTask.onUnsupportedFeature) {
          loadingTask.onUnsupportedFeature(featureId);
        }
        PDFJS.UnsupportedManager.notify(featureId);
      }, this);

messageHandler.on('JpegDecode', function(data) {
        if (this.destroyed) {
          return Promise.reject('Worker was terminated');
        }

var imageUrl = data[0];
        var components = data[1];
        if (components !== 3 && components !== 1) {
          return Promise.reject(
            new Error('Only 3 components or 1 component can be returned'));
        }

return new Promise(function (resolve, reject) {
          var img = new Image();
          img.onload = function () {
            var width = img.width;
            var height = img.height;
            var size = width * height;
            var rgbaLength = size * 4;
            var buf = new Uint8Array(size * components);
            var tmpCanvas = createScratchCanvas(width, height);
            var tmpCtx = tmpCanvas.getContext('2d');
            tmpCtx.drawImage(img, 0, 0);
            var data = tmpCtx.getImageData(0, 0, width, height).data;
            var i, j;

if (components === 3) {
              for (i = 0, j = 0; i < rgbaLength; i += 4, j += 3) {
                buf[j] = data[i];
                buf[j + 1] = data[i + 1];
                buf[j + 2] = data[i + 2];
              }
            } else if (components === 1) {
              for (i = 0, j = 0; i < rgbaLength; i += 4, j++) {
                buf[j] = data[i];
              }
            }
            resolve({ data: buf, width: width, height: height});
          };
          img.onerror = function () {
            reject(new Error('JpegDecode failed to load image'));
          };
          img.src = imageUrl;
        });
      }, this);
    },

getData: function WorkerTransport_getData() {
      return this.messageHandler.sendWithPromise('GetData', null);
    },

getPage: function WorkerTransport_getPage(pageNumber, capability) {
      if (pageNumber <= 0 || pageNumber > this.numPages ||
          (pageNumber|0) !== pageNumber) {
        return Promise.reject(new Error('Invalid page request'));
      }

getPageIndex: function WorkerTransport_getPageIndexByRef(ref) {
      return this.messageHandler.sendWithPromise('GetPageIndex', { ref: ref });
    },

getAnnotations: function WorkerTransport_getAnnotations(pageIndex, intent) {
      return this.messageHandler.sendWithPromise('GetAnnotations', {
        pageIndex: pageIndex,
        intent: intent,
      });
    },

getDestinations: function WorkerTransport_getDestinations() {
      return this.messageHandler.sendWithPromise('GetDestinations', null);
    },

getDestination: function WorkerTransport_getDestination(id) {
      return this.messageHandler.sendWithPromise('GetDestination', { id: id });
    },

getPageLabels: function WorkerTransport_getPageLabels() {
      return this.messageHandler.sendWithPromise('GetPageLabels', null);
    },

getAttachments: function WorkerTransport_getAttachments() {
      return this.messageHandler.sendWithPromise('GetAttachments', null);
    },

getJavaScript: function WorkerTransport_getJavaScript() {
      return this.messageHandler.sendWithPromise('GetJavaScript', null);
    },

getOutline: function WorkerTransport_getOutline() {
      return this.messageHandler.sendWithPromise('GetOutline', null);
    },

getMetadata: function WorkerTransport_getMetadata() {
      return this.messageHandler.sendWithPromise('GetMetadata', null).
        then(function transportMetadata(results) {
        return {
          info: results[0],
          metadata: (results[1] ? new Metadata(results[1]) : null)
        };
      });
    },

getStats: function WorkerTransport_getStats() {
      return this.messageHandler.sendWithPromise('GetStats', null);
    },

startCleanup: function WorkerTransport_startCleanup() {
      this.messageHandler.sendWithPromise('Cleanup', null).
        then(function endCleanup() {
        for (var i = 0, ii = this.pageCache.length; i < ii; i++) {
          var page = this.pageCache[i];
          if (page) {
            page.cleanup();
          }
        }
        this.commonObjs.clear();
        this.fontLoader.clear();
      }.bind(this));
    }
  };
  return WorkerTransport;

})();

/**
 * A PDF document and page is built of many objects. E.g. there are objects
 * for fonts, images, rendering code and such. These objects might get processed
 * inside of a worker. The `PDFObjects` implements some basic functions to
 * manage these objects.
 * @ignore
 */
var PDFObjects = (function PDFObjectsClosure() {
  function PDFObjects() {
    this.objs = {};
  }

PDFObjects.prototype = {
    /**
     * Internal function.
     * Ensures there is an object defined for `objId`.
     */
    ensureObj: function PDFObjects_ensureObj(objId) {
      if (this.objs[objId]) {
        return this.objs[objId];
      }

var obj = {
        capability: createPromiseCapability(),
        data: null,
        resolved: false
      };
      this.objs[objId] = obj;

return obj;
    },

/**
     * If called *without* callback, this returns the data of `objId` but the
     * object needs to be resolved. If it isn't, this function throws.
     *
     * If called *with* a callback, the callback is called with the data of the
     * object once the object is resolved. That means, if you call this
     * function and the object is already resolved, the callback gets called
     * right away.
     */
    get: function PDFObjects_get(objId, callback) {
      // If there is a callback, then the get can be async and the object is
      // not required to be resolved right now
      if (callback) {
        this.ensureObj(objId).capability.promise.then(callback);
        return null;
      }

// If there isn't a callback, the user expects to get the resolved data
      // directly.
      var obj = this.objs[objId];

// If there isn't an object yet or the object isn't resolved, then the
      // data isn't ready yet!
      if (!obj || !obj.resolved) {
        error('Requesting object that isn\'t resolved yet ' + objId);
      }

return obj.data;
    },

/**
     * Resolves the object `objId` with optional `data`.
     */
    resolve: function PDFObjects_resolve(objId, data) {
      var obj = this.ensureObj(objId);

obj.resolved = true;
      obj.data = data;
      obj.capability.resolve(data);
    },

isResolved: function PDFObjects_isResolved(objId) {
      var objs = this.objs;

if (!objs[objId]) {
        return false;
      } else {
        return objs[objId].resolved;
      }
    },

hasData: function PDFObjects_hasData(objId) {
      return this.isResolved(objId);
    },

/**
     * Returns the data of `objId` if object exists, null otherwise.
     */
    getData: function PDFObjects_getData(objId) {
      var objs = this.objs;
      if (!objs[objId] || !objs[objId].resolved) {
        return null;
      } else {
        return objs[objId].data;
      }
    },

clear: function PDFObjects_clear() {
      this.objs = {};
    }
  };
  return PDFObjects;
})();

/**
 * Allows controlling of the rendering tasks.
 * @class
 * @alias RenderTask
 */
var RenderTask = (function RenderTaskClosure() {
  function RenderTask(internalRenderTask) {
    this._internalRenderTask = internalRenderTask;

/**
     * Callback for incremental rendering -- a function that will be called
     * each time the rendering is paused.  To continue rendering call the
     * function that is the first argument to the callback.
     * @type {function}
     */
    this.onContinue = null;
  }

RenderTask.prototype = /** @lends RenderTask.prototype */ {
    /**
     * Promise for rendering task completion.
     * @return {Promise}
     */
    get promise() {
      return this._internalRenderTask.capability.promise;
    },

/**
     * Cancels the rendering task. If the task is currently rendering it will
     * not be cancelled until graphics pauses with a timeout. The promise that
     * this object extends will resolved when cancelled.
     */
    cancel: function RenderTask_cancel() {
      this._internalRenderTask.cancel();
    },

/**
     * Registers callbacks to indicate the rendering task completion.
     *
     * @param {function} onFulfilled The callback for the rendering completion.
     * @param {function} onRejected The callback for the rendering failure.
     * @return {Promise} A promise that is resolved after the onFulfilled or
     *                   onRejected callback.
     */
    then: function RenderTask_then(onFulfilled, onRejected) {
      return this.promise.then.apply(this.promise, arguments);
    }
  };

return RenderTask;
})();

/**
 * For internal use only.
 * @ignore
 */
var InternalRenderTask = (function InternalRenderTaskClosure() {

function InternalRenderTask(callback, params, objs, commonObjs, operatorList,
                              pageNumber) {
    this.callback = callback;
    this.params = params;
    this.objs = objs;
    this.commonObjs = commonObjs;
    this.operatorListIdx = null;
    this.operatorList = operatorList;
    this.pageNumber = pageNumber;
    this.running = false;
    this.graphicsReadyCallback = null;
    this.graphicsReady = false;
    this.useRequestAnimationFrame = false;
    this.cancelled = false;
    this.capability = createPromiseCapability();
    this.task = new RenderTask(this);
    // caching this-bound methods
    this._continueBound = this._continue.bind(this);
    this._scheduleNextBound = this._scheduleNext.bind(this);
    this._nextBound = this._next.bind(this);
  }

InternalRenderTask.prototype = {

initalizeGraphics:
        function InternalRenderTask_initalizeGraphics(transparency) {

if (this.cancelled) {
        return;
      }
      if (PDFJS.pdfBug && 'StepperManager' in globalScope &&
          globalScope.StepperManager.enabled) {
        this.stepper = globalScope.StepperManager.create(this.pageNumber - 1);
        this.stepper.init(this.operatorList);
        this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();
      }

var params = this.params;
      this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs,
                                    this.objs, params.imageLayer);

this.gfx.beginDrawing(params.transform, params.viewport, transparency);
      this.operatorListIdx = 0;
      this.graphicsReady = true;
      if (this.graphicsReadyCallback) {
        this.graphicsReadyCallback();
      }
    },

cancel: function InternalRenderTask_cancel() {
      this.running = false;
      this.cancelled = true;
      this.callback('cancelled');
    },

operatorListChanged: function InternalRenderTask_operatorListChanged() {
      if (!this.graphicsReady) {
        if (!this.graphicsReadyCallback) {
          this.graphicsReadyCallback = this._continueBound;
        }
        return;
      }

if (this.stepper) {
        this.stepper.updateOperatorList(this.operatorList);
      }

if (this.running) {
        return;
      }
      this._continue();
    },

_continue: function InternalRenderTask__continue() {
      this.running = true;
      if (this.cancelled) {
        return;
      }
      if (this.task.onContinue) {
        this.task.onContinue.call(this.task, this._scheduleNextBound);
      } else {
        this._scheduleNext();
      }
    },

_scheduleNext: function InternalRenderTask__scheduleNext() {
      if (this.useRequestAnimationFrame) {
        window.requestAnimationFrame(this._nextBound);
      } else {
        Promise.resolve(undefined).then(this._nextBound);
      }
    },

_next: function InternalRenderTask__next() {
      if (this.cancelled) {
        return;
      }
      this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList,
                                        this.operatorListIdx,
                                        this._continueBound,
                                        this.stepper);
      if (this.operatorListIdx === this.operatorList.argsArray.length) {
        this.running = false;
        if (this.operatorList.lastChunk) {
          this.gfx.endDrawing();
          this.callback();
        }
      }
    }

};

return InternalRenderTask;
})();

/**
 * (Deprecated) Global observer of unsupported feature usages. Use
 * onUnsupportedFeature callback of the {PDFDocumentLoadingTask} instance.
 */
PDFJS.UnsupportedManager = (function UnsupportedManagerClosure() {
  var listeners = [];
  return {
    listen: function (cb) {
      deprecated('Global UnsupportedManager.listen is used: ' +
                 ' use PDFDocumentLoadingTask.onUnsupportedFeature instead');
      listeners.push(cb);
    },
    notify: function (featureId) {
      for (var i = 0, ii = listeners.length; i < ii; i++) {
        listeners[i](featureId);
      }
    }
  };
})();

exports.getDocument = PDFJS.getDocument;
exports.PDFDataRangeTransport = PDFDataRangeTransport;
exports.PDFDocumentProxy = PDFDocumentProxy;
exports.PDFPageProxy = PDFPageProxy;
}));

}).call(pdfjsLibs);

exports.PDFJS = pdfjsLibs.pdfjsSharedGlobal.PDFJS;

exports.getDocument = pdfjsLibs.pdfjsDisplayAPI.getDocument;
  exports.PDFDataRangeTransport =
    pdfjsLibs.pdfjsDisplayAPI.PDFDataRangeTransport;
  exports.renderTextLayer = pdfjsLibs.pdfjsDisplayTextLayer.renderTextLayer;
  exports.AnnotationLayer =
    pdfjsLibs.pdfjsDisplayAnnotationLayer.AnnotationLayer;
  exports.CustomStyle = pdfjsLibs.pdfjsDisplayDOMUtils.CustomStyle;
  exports.PasswordResponses = pdfjsLibs.pdfjsSharedUtil.PasswordResponses;
  exports.InvalidPDFException = pdfjsLibs.pdfjsSharedUtil.InvalidPDFException;
  exports.MissingPDFException = pdfjsLibs.pdfjsSharedUtil.MissingPDFException;
  exports.UnexpectedResponseException =
    pdfjsLibs.pdfjsSharedUtil.UnexpectedResponseException;
}));