/* eslint-disable no-console */

// @if MODULE_FORMAT!='cjs'
import { saveAs } from "./libs/FileSaver.js";
// @endif
import { globalObject } from "./libs/globalObject.js";
import { RGBColor } from "./libs/rgbcolor.js";
import { btoa } from "./libs/AtobBtoa.js";
import { console } from "./libs/console.js";
import { PDFSecurity } from "./libs/pdfsecurity.js";
import { toPDFName } from "./libs/pdfname.js";
/**
 * jsPDF's Internal PubSub Implementation.
 * Backward compatible rewritten on 2014 by
 * Diego Casorran, https://github.com/diegocr
 *
 * @class
 * @name PubSub
 * @ignore
 */
function PubSub(context) {
  if (typeof context !== "object") {
    throw new Error(
      "Invalid Context passed to initialize PubSub (jsPDF-module)"
    );
  }
  var topics = {};

  this.subscribe = function(topic, callback, once) {
    once = once || false;
    if (
      typeof topic !== "string" ||
      typeof callback !== "function" ||
      typeof once !== "boolean"
    ) {
      throw new Error(
        "Invalid arguments passed to PubSub.subscribe (jsPDF-module)"
      );
    }

    if (!topics.hasOwnProperty(topic)) {
      topics[topic] = {};
    }

    var token = Math.random().toString(35);
    topics[topic][token] = [callback, !!once];

    return token;
  };

  this.unsubscribe = function(token) {
    for (var topic in topics) {
      if (topics[topic][token]) {
        delete topics[topic][token];
        if (Object.keys(topics[topic]).length === 0) {
          delete topics[topic];
        }
        return true;
      }
    }
    return false;
  };

  this.publish = function(topic) {
    if (topics.hasOwnProperty(topic)) {
      var args = Array.prototype.slice.call(arguments, 1),
        tokens = [];

      for (var token in topics[topic]) {
        var sub = topics[topic][token];
        try {
          sub[0].apply(context, args);
        } catch (ex) {
          if (globalObject.console) {
            console.error("jsPDF PubSub Error", ex.message, ex);
          }
        }
        if (sub[1]) tokens.push(token);
      }
      if (tokens.length) tokens.forEach(this.unsubscribe);
    }
  };

  this.getTopics = function() {
    return topics;
  };
}

function GState(parameters) {
  if (!(this instanceof GState)) {
    return new GState(parameters);
  }

  /**
   * @name GState#opacity
   * @type {any}
   */
  /**
   * @name GState#stroke-opacity
   * @type {any}
   */
  var supported = "opacity,stroke-opacity".split(",");
  for (var p in parameters) {
    if (parameters.hasOwnProperty(p) && supported.indexOf(p) >= 0) {
      this[p] = parameters[p];
    }
  }
  /**
   * @name GState#id
   * @type {string}
   */
  this.id = ""; // set by addGState()
  /**
   * @name GState#objectNumber
   * @type {number}
   */
  this.objectNumber = -1; // will be set by putGState()
}

GState.prototype.equals = function equals(other) {
  var ignore = "id,objectNumber,equals";
  var p;
  if (!other || typeof other !== typeof this) return false;
  var count = 0;
  for (p in this) {
    if (ignore.indexOf(p) >= 0) continue;
    if (this.hasOwnProperty(p) && !other.hasOwnProperty(p)) return false;
    if (this[p] !== other[p]) return false;
    count++;
  }
  for (p in other) {
    if (other.hasOwnProperty(p) && ignore.indexOf(p) < 0) count--;
  }
  return count === 0;
};

function Pattern(gState, matrix) {
  this.gState = gState;
  this.matrix = matrix;

  this.id = ""; // set by addPattern()
  this.objectNumber = -1; // will be set by putPattern()
}

function ShadingPattern(type, coords, colors, gState, matrix) {
  if (!(this instanceof ShadingPattern)) {
    return new ShadingPattern(type, coords, colors, gState, matrix);
  }

  // see putPattern() for information how they are realized
  this.type = type === "axial" ? 2 : 3;
  this.coords = coords;
  this.colors = colors;

  Pattern.call(this, gState, matrix);
}

function TilingPattern(boundingBox, xStep, yStep, gState, matrix) {
  if (!(this instanceof TilingPattern)) {
    return new TilingPattern(boundingBox, xStep, yStep, gState, matrix);
  }

  this.boundingBox = boundingBox;
  this.xStep = xStep;
  this.yStep = yStep;

  this.stream = ""; // set by endTilingPattern();

  this.cloneIndex = 0;

  Pattern.call(this, gState, matrix);
}

/**
 * Creates new jsPDF document object instance.
 * @name jsPDF
 * @class
 * @param {Object} [options] - Collection of settings initializing the jsPDF-instance
 * @param {string} [options.orientation=portrait] - Orientation of the first page. Possible values are "portrait" or "landscape" (or shortcuts "p" or "l").<br />
 * @param {string} [options.unit=mm] Measurement unit (base unit) to be used when coordinates are specified.<br />
 * Possible values are "pt" (points), "mm", "cm", "in", "px", "pc", "em" or "ex". Note that in order to get the correct scaling for "px"
 * units, you need to enable the hotfix "px_scaling" by setting options.hotfixes = ["px_scaling"].
 * @param {string/Array} [options.format=a4] The format of the first page. Can be:<ul><li>a0 - a10</li><li>b0 - b10</li><li>c0 - c10</li><li>dl</li><li>letter</li><li>government-letter</li><li>legal</li><li>junior-legal</li><li>ledger</li><li>tabloid</li><li>credit-card</li></ul><br />
 * Default is "a4". If you want to use your own format just pass instead of one of the above predefined formats the size as an number-array, e.g. [595.28, 841.89]
 * @param {boolean} [options.putOnlyUsedFonts=false] Only put fonts into the PDF, which were used.
 * @param {boolean} [options.compress=false] Compress the generated PDF.
 * @param {number} [options.precision=16] Precision of the element-positions.
 * @param {number} [options.userUnit=1.0] Not to be confused with the base unit. Please inform yourself before you use it.
 * @param {string[]} [options.hotfixes] An array of strings to enable hotfixes such as correct pixel scaling.
 * @param {Object} [options.encryption]
 * @param {string} [options.encryption.userPassword] Password for the user bound by the given permissions list.
 * @param {string} [options.encryption.ownerPassword] Both userPassword and ownerPassword should be set for proper authentication.
 * @param {string[]} [options.encryption.userPermissions] Array of permissions "print", "modify", "copy", "annot-forms", accessible by the user.
 * @param {number|"smart"} [options.floatPrecision=16]
 * @returns {jsPDF} jsPDF-instance
 * @description
 * ```
 * {
 *  orientation: 'p',
 *  unit: 'mm',
 *  format: 'a4',
 *  putOnlyUsedFonts:true,
 *  floatPrecision: 16 // or "smart", default is 16
 * }
 * ```
 *
 * @constructor
 */
function jsPDF(options) {
  var orientation = typeof arguments[0] === "string" ? arguments[0] : "p";
  var unit = arguments[1];
  var format = arguments[2];
  var compressPdf = arguments[3];
  var filters = [];
  var userUnit = 1.0;
  var precision;
  var floatPrecision = 16;
  var defaultPathOperation = "S";
  var encryptionOptions = null;

  options = options || {};

  if (typeof options === "object") {
    orientation = options.orientation;
    unit = options.unit || unit;
    format = options.format || format;
    compressPdf = options.compress || options.compressPdf || compressPdf;
    encryptionOptions = options.encryption || null;
    if (encryptionOptions !== null) {
      encryptionOptions.userPassword = encryptionOptions.userPassword || "";
      encryptionOptions.ownerPassword = encryptionOptions.ownerPassword || "";
      encryptionOptions.userPermissions =
        encryptionOptions.userPermissions || [];
    }
    userUnit =
      typeof options.userUnit === "number" ? Math.abs(options.userUnit) : 1.0;
    if (typeof options.precision !== "undefined") {
      precision = options.precision;
    }
    if (typeof options.floatPrecision !== "undefined") {
      floatPrecision = options.floatPrecision;
    }
    defaultPathOperation = options.defaultPathOperation || "S";
  }

  filters =
    options.filters || (compressPdf === true ? ["FlateEncode"] : filters);

  unit = unit || "mm";
  orientation = ("" + (orientation || "P")).toLowerCase();
  var putOnlyUsedFonts = options.putOnlyUsedFonts || false;
  var usedFonts = {};

  var API = {
    internal: {},
    __private__: {}
  };

  API.__private__.PubSub = PubSub;

  var pdfVersion = "1.3";
  var getPdfVersion = (API.__private__.getPdfVersion = function() {
    return pdfVersion;
  });

  API.__private__.setPdfVersion = function(value) {
    pdfVersion = value;
  };

  // Size in pt of various paper formats
  var pageFormats = {
    a0: [2383.94, 3370.39],
    a1: [1683.78, 2383.94],
    a2: [1190.55, 1683.78],
    a3: [841.89, 1190.55],
    a4: [595.28, 841.89],
    a5: [419.53, 595.28],
    a6: [297.64, 419.53],
    a7: [209.76, 297.64],
    a8: [147.4, 209.76],
    a9: [104.88, 147.4],
    a10: [73.7, 104.88],
    b0: [2834.65, 4008.19],
    b1: [2004.09, 2834.65],
    b2: [1417.32, 2004.09],
    b3: [1000.63, 1417.32],
    b4: [708.66, 1000.63],
    b5: [498.9, 708.66],
    b6: [354.33, 498.9],
    b7: [249.45, 354.33],
    b8: [175.75, 249.45],
    b9: [124.72, 175.75],
    b10: [87.87, 124.72],
    c0: [2599.37, 3676.54],
    c1: [1836.85, 2599.37],
    c2: [1298.27, 1836.85],
    c3: [918.43, 1298.27],
    c4: [649.13, 918.43],
    c5: [459.21, 649.13],
    c6: [323.15, 459.21],
    c7: [229.61, 323.15],
    c8: [161.57, 229.61],
    c9: [113.39, 161.57],
    c10: [79.37, 113.39],
    dl: [311.81, 623.62],
    letter: [612, 792],
    "government-letter": [576, 756],
    legal: [612, 1008],
    "junior-legal": [576, 360],
    ledger: [1224, 792],
    tabloid: [792, 1224],
    "credit-card": [153, 243]
  };

  API.__private__.getPageFormats = function() {
    return pageFormats;
  };

  var getPageFormat = (API.__private__.getPageFormat = function(value) {
    return pageFormats[value];
  });

  format = format || "a4";

  var ApiMode = {
    COMPAT: "compat",
    ADVANCED: "advanced"
  };
  var apiMode = ApiMode.COMPAT;

  function advancedAPI() {
    // prepend global change of basis matrix
    // (Now, instead of converting every coordinate to the pdf coordinate system, we apply a matrix
    // that does this job for us (however, texts, images and similar objects must be drawn bottom up))
    this.saveGraphicsState();
    out(
      new Matrix(
        scaleFactor,
        0,
        0,
        -scaleFactor,
        0,
        getPageHeight() * scaleFactor
      ).toString() + " cm"
    );
    this.setFontSize(this.getFontSize() / scaleFactor);

    // The default in MrRio's implementation is "S" (stroke), whereas the default in the yWorks implementation
    // was "n" (none). Although this has nothing to do with transforms, we should use the API switch here.
    defaultPathOperation = "n";

    apiMode = ApiMode.ADVANCED;
  }

  function compatAPI() {
    this.restoreGraphicsState();
    defaultPathOperation = "S";
    apiMode = ApiMode.COMPAT;
  }

  /**
   * @function combineFontStyleAndFontWeight
   * @param {string} fontStyle Fontstyle or variant. Example: "italic".
   * @param {number | string} fontWeight Weight of the Font. Example: "normal" | 400
   * @returns {string}
   * @private
   */
  var combineFontStyleAndFontWeight = (API.__private__.combineFontStyleAndFontWeight = function(
    fontStyle,
    fontWeight
  ) {
    if (
      (fontStyle == "bold" && fontWeight == "normal") ||
      (fontStyle == "bold" && fontWeight == 400) ||
      (fontStyle == "normal" && fontWeight == "italic") ||
      (fontStyle == "bold" && fontWeight == "italic")
    ) {
      throw new Error("Invalid Combination of fontweight and fontstyle");
    }
    if (fontWeight) {
      fontStyle =
        fontWeight == 400 || fontWeight === "normal"
          ? fontStyle === "italic"
            ? "italic"
            : "normal"
          : (fontWeight == 700 || fontWeight === "bold") &&
            fontStyle === "normal"
          ? "bold"
          : (fontWeight == 700 ? "bold" : fontWeight) + "" + fontStyle;
    }
    return fontStyle;
  });

  /**
   * @callback ApiSwitchBody
   * @param {jsPDF} pdf
   */

  /**
   * For compatibility reasons jsPDF offers two API modes which differ in the way they convert between the the usual
   * screen coordinates and the PDF coordinate system.
   *   - "compat": Offers full compatibility across all plugins but does not allow arbitrary transforms
   *   - "advanced": Allows arbitrary transforms and more advanced features like pattern fills. Some plugins might
   *     not support this mode, though.
   * Initial mode is "compat".
   *
   * You can either provide a callback to the body argument, which means that jsPDF will automatically switch back to
   * the original API mode afterwards; or you can omit the callback and switch back manually using {@link compatAPI}.
   *
   * Note, that the calls to {@link saveGraphicsState} and {@link restoreGraphicsState} need to be balanced within the
   * callback or between calls of this method and its counterpart {@link compatAPI}. Calls to {@link beginFormObject}
   * or {@link beginTilingPattern} need to be closed by their counterparts before switching back to "compat" API mode.
   *
   * @param {ApiSwitchBody=} body When provided, this callback will be called after the API mode has been switched.
   * The API mode will be switched back automatically afterwards.
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name advancedAPI
   */
  API.advancedAPI = function(body) {
    var doSwitch = apiMode === ApiMode.COMPAT;

    if (doSwitch) {
      advancedAPI.call(this);
    }

    if (typeof body !== "function") {
      return this;
    }

    body(this);

    if (doSwitch) {
      compatAPI.call(this);
    }

    return this;
  };

  /**
   * Switches to "compat" API mode. See {@link advancedAPI} for more details.
   *
   * @param {ApiSwitchBody=} body When provided, this callback will be called after the API mode has been switched.
   * The API mode will be switched back automatically afterwards.
   * @return {jsPDF}
   * @memberof jsPDF#
   * @name compatApi
   */
  API.compatAPI = function(body) {
    var doSwitch = apiMode === ApiMode.ADVANCED;

    if (doSwitch) {
      compatAPI.call(this);
    }

    if (typeof body !== "function") {
      return this;
    }

    body(this);

    if (doSwitch) {
      advancedAPI.call(this);
    }

    return this;
  };

  /**
   * @return {boolean} True iff the current API mode is "advanced". See {@link advancedAPI}.
   * @memberof jsPDF#
   * @name isAdvancedAPI
   */
  API.isAdvancedAPI = function() {
    return apiMode === ApiMode.ADVANCED;
  };

  var advancedApiModeTrap = function(methodName) {
    if (apiMode !== ApiMode.ADVANCED) {
      throw new Error(
        methodName +
          " is only available in 'advanced' API mode. " +
          "You need to call advancedAPI() first."
      );
    }
  };

  var roundToPrecision = (API.roundToPrecision = API.__private__.roundToPrecision = function(
    number,
    parmPrecision
  ) {
    var tmpPrecision = precision || parmPrecision;
    if (isNaN(number) || isNaN(tmpPrecision)) {
      throw new Error("Invalid argument passed to jsPDF.roundToPrecision");
    }
    return number.toFixed(tmpPrecision).replace(/0+$/, "");
  });

  // high precision float
  var hpf;
  if (typeof floatPrecision === "number") {
    hpf = API.hpf = API.__private__.hpf = function(number) {
      if (isNaN(number)) {
        throw new Error("Invalid argument passed to jsPDF.hpf");
      }
      return roundToPrecision(number, floatPrecision);
    };
  } else if (floatPrecision === "smart") {
    hpf = API.hpf = API.__private__.hpf = function(number) {
      if (isNaN(number)) {
        throw new Error("Invalid argument passed to jsPDF.hpf");
      }
      if (number > -1 && number < 1) {
        return roundToPrecision(number, 16);
      } else {
        return roundToPrecision(number, 5);
      }
    };
  } else {
    hpf = API.hpf = API.__private__.hpf = function(number) {
      if (isNaN(number)) {
        throw new Error("Invalid argument passed to jsPDF.hpf");
      }
      return roundToPrecision(number, 16);
    };
  }
  var f2 = (API.f2 = API.__private__.f2 = function(number) {
    if (isNaN(number)) {
      throw new Error("Invalid argument passed to jsPDF.f2");
    }
    return roundToPrecision(number, 2);
  });

  var f3 = (API.__private__.f3 = function(number) {
    if (isNaN(number)) {
      throw new Error("Invalid argument passed to jsPDF.f3");
    }
    return roundToPrecision(number, 3);
  });

  var scale = (API.scale = API.__private__.scale = function(number) {
    if (isNaN(number)) {
      throw new Error("Invalid argument passed to jsPDF.scale");
    }
    if (apiMode === ApiMode.COMPAT) {
      return number * scaleFactor;
    } else if (apiMode === ApiMode.ADVANCED) {
      return number;
    }
  });

  var transformY = function(y) {
    if (apiMode === ApiMode.COMPAT) {
      return getPageHeight() - y;
    } else if (apiMode === ApiMode.ADVANCED) {
      return y;
    }
  };

  var transformScaleY = function(y) {
    return scale(transformY(y));
  };

  /**
   * @name setPrecision
   * @memberof jsPDF#
   * @function
   * @instance
   * @param {string} precision
   * @returns {jsPDF}
   */
  API.__private__.setPrecision = API.setPrecision = function(value) {
    if (typeof parseInt(value, 10) === "number") {
      precision = parseInt(value, 10);
    }
  };

  var fileId = "00000000000000000000000000000000";

  var getFileId = (API.__private__.getFileId = function() {
    return fileId;
  });

  var setFileId = (API.__private__.setFileId = function(value) {
    if (typeof value !== "undefined" && /^[a-fA-F0-9]{32}$/.test(value)) {
      fileId = value.toUpperCase();
    } else {
      fileId = fileId
        .split("")
        .map(function() {
          return "ABCDEF0123456789".charAt(Math.floor(Math.random() * 16));
        })
        .join("");
    }

    if (encryptionOptions !== null) {
      encryption = new PDFSecurity(
        encryptionOptions.userPermissions,
        encryptionOptions.userPassword,
        encryptionOptions.ownerPassword,
        fileId
      );
    }
    return fileId;
  });

  /**
   * @name setFileId
   * @memberof jsPDF#
   * @function
   * @instance
   * @param {string} value GUID.
   * @returns {jsPDF}
   */
  API.setFileId = function(value) {
    setFileId(value);
    return this;
  };

  /**
   * @name getFileId
   * @memberof jsPDF#
   * @function
   * @instance
   *
   * @returns {string} GUID.
   */
  API.getFileId = function() {
    return getFileId();
  };

  var creationDate;

  var convertDateToPDFDate = (API.__private__.convertDateToPDFDate = function(
    parmDate
  ) {
    var result = "";
    var tzoffset = parmDate.getTimezoneOffset(),
      tzsign = tzoffset < 0 ? "+" : "-",
      tzhour = Math.floor(Math.abs(tzoffset / 60)),
      tzmin = Math.abs(tzoffset % 60),
      timeZoneString = [tzsign, padd2(tzhour), "'", padd2(tzmin), "'"].join("");

    result = [
      "D:",
      parmDate.getFullYear(),
      padd2(parmDate.getMonth() + 1),
      padd2(parmDate.getDate()),
      padd2(parmDate.getHours()),
      padd2(parmDate.getMinutes()),
      padd2(parmDate.getSeconds()),
      timeZoneString
    ].join("");
    return result;
  });

  var convertPDFDateToDate = (API.__private__.convertPDFDateToDate = function(
    parmPDFDate
  ) {
    var year = parseInt(parmPDFDate.substr(2, 4), 10);
    var month = parseInt(parmPDFDate.substr(6, 2), 10) - 1;
    var date = parseInt(parmPDFDate.substr(8, 2), 10);
    var hour = parseInt(parmPDFDate.substr(10, 2), 10);
    var minutes = parseInt(parmPDFDate.substr(12, 2), 10);
    var seconds = parseInt(parmPDFDate.substr(14, 2), 10);
    // var timeZoneHour = parseInt(parmPDFDate.substr(16, 2), 10);
    // var timeZoneMinutes = parseInt(parmPDFDate.substr(20, 2), 10);

    var resultingDate = new Date(year, month, date, hour, minutes, seconds, 0);
    return resultingDate;
  });

  var setCreationDate = (API.__private__.setCreationDate = function(date) {
    var tmpCreationDateString;
    var regexPDFCreationDate = /^D:(20[0-2][0-9]|203[0-7]|19[7-9][0-9])(0[0-9]|1[0-2])([0-2][0-9]|3[0-1])(0[0-9]|1[0-9]|2[0-3])(0[0-9]|[1-5][0-9])(0[0-9]|[1-5][0-9])(\+0[0-9]|\+1[0-4]|-0[0-9]|-1[0-1])'(0[0-9]|[1-5][0-9])'?$/;
    if (typeof date === "undefined") {
      date = new Date();
    }

    if (date instanceof Date) {
      tmpCreationDateString = convertDateToPDFDate(date);
    } else if (regexPDFCreationDate.test(date)) {
      tmpCreationDateString = date;
    } else {
      throw new Error("Invalid argument passed to jsPDF.setCreationDate");
    }
    creationDate = tmpCreationDateString;
    return creationDate;
  });

  var getCreationDate = (API.__private__.getCreationDate = function(type) {
    var result = creationDate;
    if (type === "jsDate") {
      result = convertPDFDateToDate(creationDate);
    }
    return result;
  });

  /**
   * @name setCreationDate
   * @memberof jsPDF#
   * @function
   * @instance
   * @param {Object} date
   * @returns {jsPDF}
   */
  API.setCreationDate = function(date) {
    setCreationDate(date);
    return this;
  };

  /**
   * @name getCreationDate
   * @memberof jsPDF#
   * @function
   * @instance
   * @param {Object} type
   * @returns {Object}
   */
  API.getCreationDate = function(type) {
    return getCreationDate(type);
  };

  var padd2 = (API.__private__.padd2 = function(number) {
    return ("0" + parseInt(number)).slice(-2);
  });

  var padd2Hex = (API.__private__.padd2Hex = function(hexString) {
    hexString = hexString.toString();
    return ("00" + hexString).substr(hexString.length);
  });

  var objectNumber = 0; // 'n' Current object number
  var offsets = []; // List of offsets. Activated and reset by buildDocument(). Pupulated by various calls buildDocument makes.
  var content = [];
  var contentLength = 0;
  var additionalObjects = [];

  var pages = [];
  var currentPage;
  var hasCustomDestination = false;
  var outputDestination = content;

  var resetDocument = function() {
    //reset fields relevant for objectNumber generation and xref.
    objectNumber = 0;
    contentLength = 0;
    content = [];
    offsets = [];
    additionalObjects = [];

    rootDictionaryObjId = newObjectDeferred();
    resourceDictionaryObjId = newObjectDeferred();
  };

  API.__private__.setCustomOutputDestination = function(destination) {
    hasCustomDestination = true;
    outputDestination = destination;
  };
  var setOutputDestination = function(destination) {
    if (!hasCustomDestination) {
      outputDestination = destination;
    }
  };

  API.__private__.resetCustomOutputDestination = function() {
    hasCustomDestination = false;
    outputDestination = content;
  };

  var out = (API.__private__.out = function(string) {
    string = string.toString();
    contentLength += string.length + 1;
    outputDestination.push(string);

    return outputDestination;
  });

  var write = (API.__private__.write = function(value) {
    return out(
      arguments.length === 1
        ? value.toString()
        : Array.prototype.join.call(arguments, " ")
    );
  });

  var getArrayBuffer = (API.__private__.getArrayBuffer = function(data) {
    var len = data.length,
      ab = new ArrayBuffer(len),
      u8 = new Uint8Array(ab);

    while (len--) u8[len] = data.charCodeAt(len);
    return ab;
  });

  var standardFonts = [
    ["Helvetica", "helvetica", "normal", "WinAnsiEncoding"],
    ["Helvetica-Bold", "helvetica", "bold", "WinAnsiEncoding"],
    ["Helvetica-Oblique", "helvetica", "italic", "WinAnsiEncoding"],
    ["Helvetica-BoldOblique", "helvetica", "bolditalic", "WinAnsiEncoding"],
    ["Courier", "courier", "normal", "WinAnsiEncoding"],
    ["Courier-Bold", "courier", "bold", "WinAnsiEncoding"],
    ["Courier-Oblique", "courier", "italic", "WinAnsiEncoding"],
    ["Courier-BoldOblique", "courier", "bolditalic", "WinAnsiEncoding"],
    ["Times-Roman", "times", "normal", "WinAnsiEncoding"],
    ["Times-Bold", "times", "bold", "WinAnsiEncoding"],
    ["Times-Italic", "times", "italic", "WinAnsiEncoding"],
    ["Times-BoldItalic", "times", "bolditalic", "WinAnsiEncoding"],
    ["ZapfDingbats", "zapfdingbats", "normal", null],
    ["Symbol", "symbol", "normal", null]
  ];

  API.__private__.getStandardFonts = function() {
    return standardFonts;
  };

  var activeFontSize = options.fontSize || 16;

  /**
   * Sets font size for upcoming text elements.
   *
   * @param {number} size Font size in points.
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name setFontSize
   */
  API.__private__.setFontSize = API.setFontSize = function(size) {
    if (apiMode === ApiMode.ADVANCED) {
      activeFontSize = size / scaleFactor;
    } else {
      activeFontSize = size;
    }
    return this;
  };

  /**
   * Gets the fontsize for upcoming text elements.
   *
   * @function
   * @instance
   * @returns {number}
   * @memberof jsPDF#
   * @name getFontSize
   */
  var getFontSize = (API.__private__.getFontSize = API.getFontSize = function() {
    if (apiMode === ApiMode.COMPAT) {
      return activeFontSize;
    } else {
      return activeFontSize * scaleFactor;
    }
  });

  var R2L = options.R2L || false;

  /**
   * Set value of R2L functionality.
   *
   * @param {boolean} value
   * @function
   * @instance
   * @returns {jsPDF} jsPDF-instance
   * @memberof jsPDF#
   * @name setR2L
   */
  API.__private__.setR2L = API.setR2L = function(value) {
    R2L = value;
    return this;
  };

  /**
   * Get value of R2L functionality.
   *
   * @function
   * @instance
   * @returns {boolean} jsPDF-instance
   * @memberof jsPDF#
   * @name getR2L
   */
  API.__private__.getR2L = API.getR2L = function() {
    return R2L;
  };

  var zoomMode; // default: 1;

  var setZoomMode = (API.__private__.setZoomMode = function(zoom) {
    var validZoomModes = [
      undefined,
      null,
      "fullwidth",
      "fullheight",
      "fullpage",
      "original"
    ];

    if (/^(?:\d+\.\d*|\d*\.\d+|\d+)%$/.test(zoom)) {
      zoomMode = zoom;
    } else if (!isNaN(zoom)) {
      zoomMode = parseInt(zoom, 10);
    } else if (validZoomModes.indexOf(zoom) !== -1) {
      zoomMode = zoom;
    } else {
      throw new Error(
        'zoom must be Integer (e.g. 2), a percentage Value (e.g. 300%) or fullwidth, fullheight, fullpage, original. "' +
          zoom +
          '" is not recognized.'
      );
    }
  });

  API.__private__.getZoomMode = function() {
    return zoomMode;
  };

  var pageMode; // default: 'UseOutlines';
  var setPageMode = (API.__private__.setPageMode = function(pmode) {
    var validPageModes = [
      undefined,
      null,
      "UseNone",
      "UseOutlines",
      "UseThumbs",
      "FullScreen"
    ];

    if (validPageModes.indexOf(pmode) == -1) {
      throw new Error(
        'Page mode must be one of UseNone, UseOutlines, UseThumbs, or FullScreen. "' +
          pmode +
          '" is not recognized.'
      );
    }
    pageMode = pmode;
  });

  API.__private__.getPageMode = function() {
    return pageMode;
  };

  var layoutMode; // default: 'continuous';
  var setLayoutMode = (API.__private__.setLayoutMode = function(layout) {
    var validLayoutModes = [
      undefined,
      null,
      "continuous",
      "single",
      "twoleft",
      "tworight",
      "two"
    ];

    if (validLayoutModes.indexOf(layout) == -1) {
      throw new Error(
        'Layout mode must be one of continuous, single, twoleft, tworight. "' +
          layout +
          '" is not recognized.'
      );
    }
    layoutMode = layout;
  });

  API.__private__.getLayoutMode = function() {
    return layoutMode;
  };

  /**
   * Set the display mode options of the page like zoom and layout.
   *
   * @name setDisplayMode
   * @memberof jsPDF#
   * @function
   * @instance
   * @param {integer|String} zoom   You can pass an integer or percentage as
   * a string. 2 will scale the document up 2x, '200%' will scale up by the
   * same amount. You can also set it to 'fullwidth', 'fullheight',
   * 'fullpage', or 'original'.
   *
   * Only certain PDF readers support this, such as Adobe Acrobat.
   *
   * @param {string} layout Layout mode can be: 'continuous' - this is the
   * default continuous scroll. 'single' - the single page mode only shows one
   * page at a time. 'twoleft' - two column left mode, first page starts on
   * the left, and 'tworight' - pages are laid out in two columns, with the
   * first page on the right. This would be used for books.
   * @param {string} pmode 'UseOutlines' - it shows the
   * outline of the document on the left. 'UseThumbs' - shows thumbnails along
   * the left. 'FullScreen' - prompts the user to enter fullscreen mode.
   *
   * @returns {jsPDF}
   */
  API.__private__.setDisplayMode = API.setDisplayMode = function(
    zoom,
    layout,
    pmode
  ) {
    setZoomMode(zoom);
    setLayoutMode(layout);
    setPageMode(pmode);
    return this;
  };

  var documentProperties = {
    title: "",
    subject: "",
    author: "",
    keywords: "",
    creator: ""
  };

  API.__private__.getDocumentProperty = function(key) {
    if (Object.keys(documentProperties).indexOf(key) === -1) {
      throw new Error("Invalid argument passed to jsPDF.getDocumentProperty");
    }
    return documentProperties[key];
  };

  API.__private__.getDocumentProperties = function() {
    return documentProperties;
  };

  /**
   * Adds a properties to the PDF document.
   *
   * @param {Object} A property_name-to-property_value object structure.
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name setDocumentProperties
   */
  API.__private__.setDocumentProperties = API.setProperties = API.setDocumentProperties = function(
    properties
  ) {
    // copying only those properties we can render.
    for (var property in documentProperties) {
      if (documentProperties.hasOwnProperty(property) && properties[property]) {
        documentProperties[property] = properties[property];
      }
    }
    return this;
  };

  API.__private__.setDocumentProperty = function(key, value) {
    if (Object.keys(documentProperties).indexOf(key) === -1) {
      throw new Error("Invalid arguments passed to jsPDF.setDocumentProperty");
    }
    return (documentProperties[key] = value);
  };

  var fonts = {}; // collection of font objects, where key is fontKey - a dynamically created label for a given font.
  var fontmap = {}; // mapping structure fontName > fontStyle > font key - performance layer. See addFont()
  var activeFontKey; // will be string representing the KEY of the font as combination of fontName + fontStyle
  var fontStateStack = []; //
  var patterns = {}; // collection of pattern objects
  var patternMap = {}; // see fonts
  var gStates = {}; // collection of graphic state objects
  var gStatesMap = {}; // see fonts
  var activeGState = null;
  var scaleFactor; // Scale factor
  var page = 0;
  var pagesContext = [];
  var events = new PubSub(API);
  var hotfixes = options.hotfixes || [];

  var renderTargets = {};
  var renderTargetMap = {};
  var renderTargetStack = [];
  var pageX;
  var pageY;
  var pageMatrix; // only used for FormObjects

  /**
   * A matrix object for 2D homogenous transformations: <br>
   * | a b 0 | <br>
   * | c d 0 | <br>
   * | e f 1 | <br>
   * pdf multiplies matrices righthand: v' = v x m1 x m2 x ...
   *
   * @class
   * @name Matrix
   * @param {number} sx
   * @param {number} shy
   * @param {number} shx
   * @param {number} sy
   * @param {number} tx
   * @param {number} ty
   * @constructor
   */
  var Matrix = function(sx, shy, shx, sy, tx, ty) {
    if (!(this instanceof Matrix)) {
      return new Matrix(sx, shy, shx, sy, tx, ty);
    }

    if (isNaN(sx)) sx = 1;
    if (isNaN(shy)) shy = 0;
    if (isNaN(shx)) shx = 0;
    if (isNaN(sy)) sy = 1;
    if (isNaN(tx)) tx = 0;
    if (isNaN(ty)) ty = 0;

    this._matrix = [sx, shy, shx, sy, tx, ty];
  };

  /**
   * @name sx
   * @memberof Matrix#
   */
  Object.defineProperty(Matrix.prototype, "sx", {
    get: function() {
      return this._matrix[0];
    },
    set: function(value) {
      this._matrix[0] = value;
    }
  });

  /**
   * @name shy
   * @memberof Matrix#
   */
  Object.defineProperty(Matrix.prototype, "shy", {
    get: function() {
      return this._matrix[1];
    },
    set: function(value) {
      this._matrix[1] = value;
    }
  });

  /**
   * @name shx
   * @memberof Matrix#
   */
  Object.defineProperty(Matrix.prototype, "shx", {
    get: function() {
      return this._matrix[2];
    },
    set: function(value) {
      this._matrix[2] = value;
    }
  });

  /**
   * @name sy
   * @memberof Matrix#
   */
  Object.defineProperty(Matrix.prototype, "sy", {
    get: function() {
      return this._matrix[3];
    },
    set: function(value) {
      this._matrix[3] = value;
    }
  });

  /**
   * @name tx
   * @memberof Matrix#
   */
  Object.defineProperty(Matrix.prototype, "tx", {
    get: function() {
      return this._matrix[4];
    },
    set: function(value) {
      this._matrix[4] = value;
    }
  });

  /**
   * @name ty
   * @memberof Matrix#
   */
  Object.defineProperty(Matrix.prototype, "ty", {
    get: function() {
      return this._matrix[5];
    },
    set: function(value) {
      this._matrix[5] = value;
    }
  });

  Object.defineProperty(Matrix.prototype, "a", {
    get: function() {
      return this._matrix[0];
    },
    set: function(value) {
      this._matrix[0] = value;
    }
  });

  Object.defineProperty(Matrix.prototype, "b", {
    get: function() {
      return this._matrix[1];
    },
    set: function(value) {
      this._matrix[1] = value;
    }
  });

  Object.defineProperty(Matrix.prototype, "c", {
    get: function() {
      return this._matrix[2];
    },
    set: function(value) {
      this._matrix[2] = value;
    }
  });

  Object.defineProperty(Matrix.prototype, "d", {
    get: function() {
      return this._matrix[3];
    },
    set: function(value) {
      this._matrix[3] = value;
    }
  });

  Object.defineProperty(Matrix.prototype, "e", {
    get: function() {
      return this._matrix[4];
    },
    set: function(value) {
      this._matrix[4] = value;
    }
  });

  Object.defineProperty(Matrix.prototype, "f", {
    get: function() {
      return this._matrix[5];
    },
    set: function(value) {
      this._matrix[5] = value;
    }
  });

  /**
   * @name rotation
   * @memberof Matrix#
   */
  Object.defineProperty(Matrix.prototype, "rotation", {
    get: function() {
      return Math.atan2(this.shx, this.sx);
    }
  });

  /**
   * @name scaleX
   * @memberof Matrix#
   */
  Object.defineProperty(Matrix.prototype, "scaleX", {
    get: function() {
      return this.decompose().scale.sx;
    }
  });

  /**
   * @name scaleY
   * @memberof Matrix#
   */
  Object.defineProperty(Matrix.prototype, "scaleY", {
    get: function() {
      return this.decompose().scale.sy;
    }
  });

  /**
   * @name isIdentity
   * @memberof Matrix#
   */
  Object.defineProperty(Matrix.prototype, "isIdentity", {
    get: function() {
      if (this.sx !== 1) {
        return false;
      }
      if (this.shy !== 0) {
        return false;
      }
      if (this.shx !== 0) {
        return false;
      }
      if (this.sy !== 1) {
        return false;
      }
      if (this.tx !== 0) {
        return false;
      }
      if (this.ty !== 0) {
        return false;
      }
      return true;
    }
  });

  /**
   * Join the Matrix Values to a String
   *
   * @function join
   * @param {string} separator Specifies a string to separate each pair of adjacent elements of the array. The separator is converted to a string if necessary. If omitted, the array elements are separated with a comma (","). If separator is an empty string, all elements are joined without any characters in between them.
   * @returns {string} A string with all array elements joined.
   * @memberof Matrix#
   */
  Matrix.prototype.join = function(separator) {
    return [this.sx, this.shy, this.shx, this.sy, this.tx, this.ty]
      .map(hpf)
      .join(separator);
  };

  /**
   * Multiply the matrix with given Matrix
   *
   * @function multiply
   * @param matrix
   * @returns {Matrix}
   * @memberof Matrix#
   */
  Matrix.prototype.multiply = function(matrix) {
    var sx = matrix.sx * this.sx + matrix.shy * this.shx;
    var shy = matrix.sx * this.shy + matrix.shy * this.sy;
    var shx = matrix.shx * this.sx + matrix.sy * this.shx;
    var sy = matrix.shx * this.shy + matrix.sy * this.sy;
    var tx = matrix.tx * this.sx + matrix.ty * this.shx + this.tx;
    var ty = matrix.tx * this.shy + matrix.ty * this.sy + this.ty;

    return new Matrix(sx, shy, shx, sy, tx, ty);
  };

  /**
   * @function decompose
   * @memberof Matrix#
   */
  Matrix.prototype.decompose = function() {
    var a = this.sx;
    var b = this.shy;
    var c = this.shx;
    var d = this.sy;
    var e = this.tx;
    var f = this.ty;

    var scaleX = Math.sqrt(a * a + b * b);
    a /= scaleX;
    b /= scaleX;

    var shear = a * c + b * d;
    c -= a * shear;
    d -= b * shear;

    var scaleY = Math.sqrt(c * c + d * d);
    c /= scaleY;
    d /= scaleY;
    shear /= scaleY;

    if (a * d < b * c) {
      a = -a;
      b = -b;
      shear = -shear;
      scaleX = -scaleX;
    }

    return {
      scale: new Matrix(scaleX, 0, 0, scaleY, 0, 0),
      translate: new Matrix(1, 0, 0, 1, e, f),
      rotate: new Matrix(a, b, -b, a, 0, 0),
      skew: new Matrix(1, 0, shear, 1, 0, 0)
    };
  };

  /**
   * @function toString
   * @memberof Matrix#
   */
  Matrix.prototype.toString = function(parmPrecision) {
    return this.join(" ");
  };

  /**
   * @function inversed
   * @memberof Matrix#
   */
  Matrix.prototype.inversed = function() {
    var a = this.sx,
      b = this.shy,
      c = this.shx,
      d = this.sy,
      e = this.tx,
      f = this.ty;

    var quot = 1 / (a * d - b * c);

    var aInv = d * quot;
    var bInv = -b * quot;
    var cInv = -c * quot;
    var dInv = a * quot;
    var eInv = -aInv * e - cInv * f;
    var fInv = -bInv * e - dInv * f;

    return new Matrix(aInv, bInv, cInv, dInv, eInv, fInv);
  };

  /**
   * @function applyToPoint
   * @memberof Matrix#
   */
  Matrix.prototype.applyToPoint = function(pt) {
    var x = pt.x * this.sx + pt.y * this.shx + this.tx;
    var y = pt.x * this.shy + pt.y * this.sy + this.ty;
    return new Point(x, y);
  };

  /**
   * @function applyToRectangle
   * @memberof Matrix#
   */
  Matrix.prototype.applyToRectangle = function(rect) {
    var pt1 = this.applyToPoint(rect);
    var pt2 = this.applyToPoint(new Point(rect.x + rect.w, rect.y + rect.h));
    return new Rectangle(pt1.x, pt1.y, pt2.x - pt1.x, pt2.y - pt1.y);
  };

  /**
   * Clone the Matrix
   *
   * @function clone
   * @memberof Matrix#
   * @name clone
   * @instance
   */
  Matrix.prototype.clone = function() {
    var sx = this.sx;
    var shy = this.shy;
    var shx = this.shx;
    var sy = this.sy;
    var tx = this.tx;
    var ty = this.ty;

    return new Matrix(sx, shy, shx, sy, tx, ty);
  };

  API.Matrix = Matrix;

  /**
   * Multiplies two matrices. (see {@link Matrix})
   * @param {Matrix} m1
   * @param {Matrix} m2
   * @memberof jsPDF#
   * @name matrixMult
   */
  var matrixMult = (API.matrixMult = function(m1, m2) {
    return m2.multiply(m1);
  });

  /**
   * The identity matrix (equivalent to new Matrix(1, 0, 0, 1, 0, 0)).
   * @type {Matrix}
   * @memberof! jsPDF#
   * @name identityMatrix
   */
  var identityMatrix = new Matrix(1, 0, 0, 1, 0, 0);
  API.unitMatrix = API.identityMatrix = identityMatrix;

  /**
   * Adds a new pattern for later use.
   * @param {String} key The key by it can be referenced later. The keys must be unique!
   * @param {API.Pattern} pattern The pattern
   */
  var addPattern = function(key, pattern) {
    // only add it if it is not already present (the keys provided by the user must be unique!)
    if (patternMap[key]) return;

    var prefix = pattern instanceof ShadingPattern ? "Sh" : "P";
    var patternKey = prefix + (Object.keys(patterns).length + 1).toString(10);
    pattern.id = patternKey;

    patternMap[key] = patternKey;
    patterns[patternKey] = pattern;

    events.publish("addPattern", pattern);
  };

  /**
   * A pattern describing a shading pattern.
   *
   * Only available in "advanced" API mode.
   *
   * @param {String} type One of "axial" or "radial"
   * @param {Array<Number>} coords Either [x1, y1, x2, y2] for "axial" type describing the two interpolation points
   * or [x1, y1, r, x2, y2, r2] for "radial" describing inner and the outer circle.
   * @param {Array<Object>} colors An array of objects with the fields "offset" and "color". "offset" describes
   * the offset in parameter space [0, 1]. "color" is an array of length 3 describing RGB values in [0, 255].
   * @param {GState=} gState An additional graphics state that gets applied to the pattern (optional).
   * @param {Matrix=} matrix A matrix that describes the transformation between the pattern coordinate system
   * and the use coordinate system (optional).
   * @constructor
   * @extends API.Pattern
   */
  API.ShadingPattern = ShadingPattern;

  /**
   * A PDF Tiling pattern.
   *
   * Only available in "advanced" API mode.
   *
   * @param {Array.<Number>} boundingBox The bounding box at which one pattern cell gets clipped.
   * @param {Number} xStep Horizontal spacing between pattern cells.
   * @param {Number} yStep Vertical spacing between pattern cells.
   * @param {API.GState=} gState An additional graphics state that gets applied to the pattern (optional).
   * @param {Matrix=} matrix A matrix that describes the transformation between the pattern coordinate system
   * and the use coordinate system (optional).
   * @constructor
   * @extends API.Pattern
   */
  API.TilingPattern = TilingPattern;

  /**
   * Adds a new {@link API.ShadingPattern} for later use. Only available in "advanced" API mode.
   * @param {String} key
   * @param {Pattern} pattern
   * @function
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name addPattern
   */
  API.addShadingPattern = function(key, pattern) {
    advancedApiModeTrap("addShadingPattern()");

    addPattern(key, pattern);
    return this;
  };

  /**
   * Begins a new tiling pattern. All subsequent render calls are drawn to this pattern until {@link API.endTilingPattern}
   * gets called. Only available in "advanced" API mode.
   * @param {API.Pattern} pattern
   * @memberof jsPDF#
   * @name beginTilingPattern
   */
  API.beginTilingPattern = function(pattern) {
    advancedApiModeTrap("beginTilingPattern()");

    beginNewRenderTarget(
      pattern.boundingBox[0],
      pattern.boundingBox[1],
      pattern.boundingBox[2] - pattern.boundingBox[0],
      pattern.boundingBox[3] - pattern.boundingBox[1],
      pattern.matrix
    );
  };

  /**
   * Ends a tiling pattern and sets the render target to the one active before {@link API.beginTilingPattern} has been called.
   *
   * Only available in "advanced" API mode.
   *
   * @param {string} key A unique key that is used to reference this pattern at later use.
   * @param {API.Pattern} pattern The pattern to end.
   * @memberof jsPDF#
   * @name endTilingPattern
   */
  API.endTilingPattern = function(key, pattern) {
    advancedApiModeTrap("endTilingPattern()");

    // retrieve the stream
    pattern.stream = pages[currentPage].join("\n");

    addPattern(key, pattern);

    events.publish("endTilingPattern", pattern);

    // restore state from stack
    renderTargetStack.pop().restore();
  };

  var newObject = (API.__private__.newObject = function() {
    var oid = newObjectDeferred();
    newObjectDeferredBegin(oid, true);
    return oid;
  });

  // Does not output the object.  The caller must call newObjectDeferredBegin(oid) before outputing any data
  var newObjectDeferred = (API.__private__.newObjectDeferred = function() {
    objectNumber++;
    offsets[objectNumber] = function() {
      return contentLength;
    };
    return objectNumber;
  });

  var newObjectDeferredBegin = function(oid, doOutput) {
    doOutput = typeof doOutput === "boolean" ? doOutput : false;
    offsets[oid] = contentLength;
    if (doOutput) {
      out(oid + " 0 obj");
    }
    return oid;
  };
  // Does not output the object until after the pages have been output.
  // Returns an object containing the objectId and content.
  // All pages have been added so the object ID can be estimated to start right after.
  // This does not modify the current objectNumber;  It must be updated after the newObjects are output.
  var newAdditionalObject = (API.__private__.newAdditionalObject = function() {
    var objId = newObjectDeferred();
    var obj = {
      objId: objId,
      content: ""
    };
    additionalObjects.push(obj);
    return obj;
  });

  var rootDictionaryObjId = newObjectDeferred();
  var resourceDictionaryObjId = newObjectDeferred();

  /////////////////////
  // Private functions
  /////////////////////

  var decodeColorString = (API.__private__.decodeColorString = function(color) {
    var colorEncoded = color.split(" ");
    if (
      colorEncoded.length === 2 &&
      (colorEncoded[1] === "g" || colorEncoded[1] === "G")
    ) {
      // convert grayscale value to rgb so that it can be converted to hex for consistency
      var floatVal = parseFloat(colorEncoded[0]);
      colorEncoded = [floatVal, floatVal, floatVal, "r"];
    } else if (
      colorEncoded.length === 5 &&
      (colorEncoded[4] === "k" || colorEncoded[4] === "K")
    ) {
      // convert CMYK values to rbg so that it can be converted to hex for consistency
      var red = (1.0 - colorEncoded[0]) * (1.0 - colorEncoded[3]);
      var green = (1.0 - colorEncoded[1]) * (1.0 - colorEncoded[3]);
      var blue = (1.0 - colorEncoded[2]) * (1.0 - colorEncoded[3]);

      colorEncoded = [red, green, blue, "r"];
    }
    var colorAsRGB = "#";
    for (var i = 0; i < 3; i++) {
      colorAsRGB += (
        "0" + Math.floor(parseFloat(colorEncoded[i]) * 255).toString(16)
      ).slice(-2);
    }
    return colorAsRGB;
  });

  var encodeColorString = (API.__private__.encodeColorString = function(
    options
  ) {
    var color;

    if (typeof options === "string") {
      options = {
        ch1: options
      };
    }
    var ch1 = options.ch1;
    var ch2 = options.ch2;
    var ch3 = options.ch3;
    var ch4 = options.ch4;
    var letterArray =
      options.pdfColorType === "draw" ? ["G", "RG", "K"] : ["g", "rg", "k"];

    if (typeof ch1 === "string" && ch1.charAt(0) !== "#") {
      var rgbColor = new RGBColor(ch1);
      if (rgbColor.ok) {
        ch1 = rgbColor.toHex();
      } else if (!/^\d*\.?\d*$/.test(ch1)) {
        throw new Error(
          'Invalid color "' + ch1 + '" passed to jsPDF.encodeColorString.'
        );
      }
    }
    //convert short rgb to long form
    if (typeof ch1 === "string" && /^#[0-9A-Fa-f]{3}$/.test(ch1)) {
      ch1 = "#" + ch1[1] + ch1[1] + ch1[2] + ch1[2] + ch1[3] + ch1[3];
    }

    if (typeof ch1 === "string" && /^#[0-9A-Fa-f]{6}$/.test(ch1)) {
      var hex = parseInt(ch1.substr(1), 16);
      ch1 = (hex >> 16) & 255;
      ch2 = (hex >> 8) & 255;
      ch3 = hex & 255;
    }

    if (
      typeof ch2 === "undefined" ||
      (typeof ch4 === "undefined" && ch1 === ch2 && ch2 === ch3)
    ) {
      // Gray color space.
      if (typeof ch1 === "string") {
        color = ch1 + " " + letterArray[0];
      } else {
        switch (options.precision) {
          case 2:
            color = f2(ch1 / 255) + " " + letterArray[0];
            break;
          case 3:
          default:
            color = f3(ch1 / 255) + " " + letterArray[0];
        }
      }
    } else if (typeof ch4 === "undefined" || typeof ch4 === "object") {
      // assume RGBA
      if (ch4 && !isNaN(ch4.a)) {
        //TODO Implement transparency.
        //WORKAROUND use white for now, if transparent, otherwise handle as rgb
        if (ch4.a === 0) {
          color = ["1.", "1.", "1.", letterArray[1]].join(" ");
          return color;
        }
      }
      // assume RGB
      if (typeof ch1 === "string") {
        color = [ch1, ch2, ch3, letterArray[1]].join(" ");
      } else {
        switch (options.precision) {
          case 2:
            color = [
              f2(ch1 / 255),
              f2(ch2 / 255),
              f2(ch3 / 255),
              letterArray[1]
            ].join(" ");
            break;
          default:
          case 3:
            color = [
              f3(ch1 / 255),
              f3(ch2 / 255),
              f3(ch3 / 255),
              letterArray[1]
            ].join(" ");
        }
      }
    } else {
      // assume CMYK
      if (typeof ch1 === "string") {
        color = [ch1, ch2, ch3, ch4, letterArray[2]].join(" ");
      } else {
        switch (options.precision) {
          case 2:
            color = [f2(ch1), f2(ch2), f2(ch3), f2(ch4), letterArray[2]].join(
              " "
            );
            break;
          case 3:
          default:
            color = [f3(ch1), f3(ch2), f3(ch3), f3(ch4), letterArray[2]].join(
              " "
            );
        }
      }
    }
    return color;
  });

  var getFilters = (API.__private__.getFilters = function() {
    return filters;
  });

  var putStream = (API.__private__.putStream = function(options) {
    options = options || {};
    var data = options.data || "";
    var filters = options.filters || getFilters();
    var alreadyAppliedFilters = options.alreadyAppliedFilters || [];
    var addLength1 = options.addLength1 || false;
    var valueOfLength1 = data.length;
    var objectId = options.objectId;
    var encryptor = function(data) {
      return data;
    };
    if (encryptionOptions !== null && typeof objectId == "undefined") {
      throw new Error(
        "ObjectId must be passed to putStream for file encryption"
      );
    }
    if (encryptionOptions !== null) {
      encryptor = encryption.encryptor(objectId, 0);
    }

    var processedData = {};
    if (filters === true) {
      filters = ["FlateEncode"];
    }
    var keyValues = options.additionalKeyValues || [];
    if (typeof jsPDF.API.processDataByFilters !== "undefined") {
      processedData = jsPDF.API.processDataByFilters(data, filters);
    } else {
      processedData = { data: data, reverseChain: [] };
    }
    var filterAsString =
      processedData.reverseChain +
      (Array.isArray(alreadyAppliedFilters)
        ? alreadyAppliedFilters.join(" ")
        : alreadyAppliedFilters.toString());

    if (processedData.data.length !== 0) {
      keyValues.push({
        key: "Length",
        value: processedData.data.length
      });
      if (addLength1 === true) {
        keyValues.push({
          key: "Length1",
          value: valueOfLength1
        });
      }
    }

    if (filterAsString.length != 0) {
      if (filterAsString.split("/").length - 1 === 1) {
        keyValues.push({
          key: "Filter",
          value: filterAsString
        });
      } else {
        keyValues.push({
          key: "Filter",
          value: "[" + filterAsString + "]"
        });

        for (var j = 0; j < keyValues.length; j += 1) {
          if (keyValues[j].key === "DecodeParms") {
            var decodeParmsArray = [];

            for (
              var i = 0;
              i < processedData.reverseChain.split("/").length - 1;
              i += 1
            ) {
              decodeParmsArray.push("null");
            }

            decodeParmsArray.push(keyValues[j].value);
            keyValues[j].value = "[" + decodeParmsArray.join(" ") + "]";
          }
        }
      }
    }

    out("<<");
    for (var k = 0; k < keyValues.length; k++) {
      out("/" + keyValues[k].key + " " + keyValues[k].value);
    }
    out(">>");
    if (processedData.data.length !== 0) {
      out("stream");
      out(encryptor(processedData.data));
      out("endstream");
    }
  });

  var putPage = (API.__private__.putPage = function(page) {
    var pageNumber = page.number;
    var data = page.data;
    var pageObjectNumber = page.objId;
    var pageContentsObjId = page.contentsObjId;

    newObjectDeferredBegin(pageObjectNumber, true);
    out("<</Type /Page");
    out("/Parent " + page.rootDictionaryObjId + " 0 R");
    out("/Resources " + page.resourceDictionaryObjId + " 0 R");
    out(
      "/MediaBox [" +
        parseFloat(hpf(page.mediaBox.bottomLeftX)) +
        " " +
        parseFloat(hpf(page.mediaBox.bottomLeftY)) +
        " " +
        hpf(page.mediaBox.topRightX) +
        " " +
        hpf(page.mediaBox.topRightY) +
        "]"
    );
    if (page.cropBox !== null) {
      out(
        "/CropBox [" +
          hpf(page.cropBox.bottomLeftX) +
          " " +
          hpf(page.cropBox.bottomLeftY) +
          " " +
          hpf(page.cropBox.topRightX) +
          " " +
          hpf(page.cropBox.topRightY) +
          "]"
      );
    }

    if (page.bleedBox !== null) {
      out(
        "/BleedBox [" +
          hpf(page.bleedBox.bottomLeftX) +
          " " +
          hpf(page.bleedBox.bottomLeftY) +
          " " +
          hpf(page.bleedBox.topRightX) +
          " " +
          hpf(page.bleedBox.topRightY) +
          "]"
      );
    }

    if (page.trimBox !== null) {
      out(
        "/TrimBox [" +
          hpf(page.trimBox.bottomLeftX) +
          " " +
          hpf(page.trimBox.bottomLeftY) +
          " " +
          hpf(page.trimBox.topRightX) +
          " " +
          hpf(page.trimBox.topRightY) +
          "]"
      );
    }

    if (page.artBox !== null) {
      out(
        "/ArtBox [" +
          hpf(page.artBox.bottomLeftX) +
          " " +
          hpf(page.artBox.bottomLeftY) +
          " " +
          hpf(page.artBox.topRightX) +
          " " +
          hpf(page.artBox.topRightY) +
          "]"
      );
    }

    if (typeof page.userUnit === "number" && page.userUnit !== 1.0) {
      out("/UserUnit " + page.userUnit);
    }

    events.publish("putPage", {
      objId: pageObjectNumber,
      pageContext: pagesContext[pageNumber],
      pageNumber: pageNumber,
      page: data
    });
    out("/Contents " + pageContentsObjId + " 0 R");
    out(">>");
    out("endobj");
    // Page content
    var pageContent = data.join("\n");

    if (apiMode === ApiMode.ADVANCED) {
      // if the user forgot to switch back to COMPAT mode, we must balance the graphics stack again
      pageContent += "\nQ";
    }

    newObjectDeferredBegin(pageContentsObjId, true);
    putStream({
      data: pageContent,
      filters: getFilters(),
      objectId: pageContentsObjId
    });
    out("endobj");
    return pageObjectNumber;
  });

  var putPages = (API.__private__.putPages = function() {
    var n,
      i,
      pageObjectNumbers = [];

    for (n = 1; n <= page; n++) {
      pagesContext[n].objId = newObjectDeferred();
      pagesContext[n].contentsObjId = newObjectDeferred();
    }

    for (n = 1; n <= page; n++) {
      pageObjectNumbers.push(
        putPage({
          number: n,
          data: pages[n],
          objId: pagesContext[n].objId,
          contentsObjId: pagesContext[n].contentsObjId,
          mediaBox: pagesContext[n].mediaBox,
          cropBox: pagesContext[n].cropBox,
          bleedBox: pagesContext[n].bleedBox,
          trimBox: pagesContext[n].trimBox,
          artBox: pagesContext[n].artBox,
          userUnit: pagesContext[n].userUnit,
          rootDictionaryObjId: rootDictionaryObjId,
          resourceDictionaryObjId: resourceDictionaryObjId
        })
      );
    }
    newObjectDeferredBegin(rootDictionaryObjId, true);
    out("<</Type /Pages");
    var kids = "/Kids [";
    for (i = 0; i < page; i++) {
      kids += pageObjectNumbers[i] + " 0 R ";
    }
    out(kids + "]");
    out("/Count " + page);
    out(">>");
    out("endobj");
    events.publish("postPutPages");
  });

  var putFont = function(font) {
    events.publish("putFont", {
      font: font,
      out: out,
      newObject: newObject,
      putStream: putStream
    });

    if (font.isAlreadyPutted !== true) {
      font.objectNumber = newObject();
      out("<<");
      out("/Type /Font");
      out("/BaseFont /" + toPDFName(font.postScriptName));
      out("/Subtype /Type1");
      if (typeof font.encoding === "string") {
        out("/Encoding /" + font.encoding);
      }
      out("/FirstChar 32");
      out("/LastChar 255");
      out(">>");
      out("endobj");
    }
  };

  var putFonts = function() {
    for (var fontKey in fonts) {
      if (fonts.hasOwnProperty(fontKey)) {
        if (
          putOnlyUsedFonts === false ||
          (putOnlyUsedFonts === true && usedFonts.hasOwnProperty(fontKey))
        ) {
          putFont(fonts[fontKey]);
        }
      }
    }
  };

  var putXObject = function(xObject) {
    xObject.objectNumber = newObject();

    var options = [];
    options.push({ key: "Type", value: "/XObject" });
    options.push({ key: "Subtype", value: "/Form" });
    options.push({
      key: "BBox",
      value:
        "[" +
        [
          hpf(xObject.x),
          hpf(xObject.y),
          hpf(xObject.x + xObject.width),
          hpf(xObject.y + xObject.height)
        ].join(" ") +
        "]"
    });
    options.push({
      key: "Matrix",
      value: "[" + xObject.matrix.toString() + "]"
    });
    // TODO: /Resources

    var stream = xObject.pages[1].join("\n");
    putStream({
      data: stream,
      additionalKeyValues: options,
      objectId: xObject.objectNumber
    });
    out("endobj");
  };

  var putXObjects = function() {
    for (var xObjectKey in renderTargets) {
      if (renderTargets.hasOwnProperty(xObjectKey)) {
        putXObject(renderTargets[xObjectKey]);
      }
    }
  };

  var interpolateAndEncodeRGBStream = function(colors, numberSamples) {
    var tValues = [];
    var t;
    var dT = 1.0 / (numberSamples - 1);
    for (t = 0.0; t < 1.0; t += dT) {
      tValues.push(t);
    }
    tValues.push(1.0);
    // add first and last control point if not present
    if (colors[0].offset != 0.0) {
      var c0 = {
        offset: 0.0,
        color: colors[0].color
      };
      colors.unshift(c0);
    }
    if (colors[colors.length - 1].offset != 1.0) {
      var c1 = {
        offset: 1.0,
        color: colors[colors.length - 1].color
      };
      colors.push(c1);
    }
    var out = "";
    var index = 0;

    for (var i = 0; i < tValues.length; i++) {
      t = tValues[i];
      while (t > colors[index + 1].offset) index++;
      var a = colors[index].offset;
      var b = colors[index + 1].offset;
      var d = (t - a) / (b - a);

      var aColor = colors[index].color;
      var bColor = colors[index + 1].color;

      out +=
        padd2Hex(Math.round((1 - d) * aColor[0] + d * bColor[0]).toString(16)) +
        padd2Hex(Math.round((1 - d) * aColor[1] + d * bColor[1]).toString(16)) +
        padd2Hex(Math.round((1 - d) * aColor[2] + d * bColor[2]).toString(16));
    }
    return out.trim();
  };

  var putShadingPattern = function(pattern, numberSamples) {
    /*
       Axial patterns shade between the two points specified in coords, radial patterns between the inner
       and outer circle.
       The user can specify an array (colors) that maps t-Values in [0, 1] to RGB colors. These are now
       interpolated to equidistant samples and written to pdf as a sample (type 0) function.
       */
    // The number of color samples that should be used to describe the shading.
    // The higher, the more accurate the gradient will be.
    numberSamples || (numberSamples = 21);
    var funcObjectNumber = newObject();
    var stream = interpolateAndEncodeRGBStream(pattern.colors, numberSamples);

    var options = [];
    options.push({ key: "FunctionType", value: "0" });
    options.push({ key: "Domain", value: "[0.0 1.0]" });
    options.push({ key: "Size", value: "[" + numberSamples + "]" });
    options.push({ key: "BitsPerSample", value: "8" });
    options.push({ key: "Range", value: "[0.0 1.0 0.0 1.0 0.0 1.0]" });
    options.push({ key: "Decode", value: "[0.0 1.0 0.0 1.0 0.0 1.0]" });

    putStream({
      data: stream,
      additionalKeyValues: options,
      alreadyAppliedFilters: ["/ASCIIHexDecode"],
      objectId: funcObjectNumber
    });
    out("endobj");

    pattern.objectNumber = newObject();
    out("<< /ShadingType " + pattern.type);
    out("/ColorSpace /DeviceRGB");
    var coords =
      "/Coords [" +
      hpf(parseFloat(pattern.coords[0])) +
      " " + // x1
      hpf(parseFloat(pattern.coords[1])) +
      " "; // y1
    if (pattern.type === 2) {
      // axial
      coords +=
        hpf(parseFloat(pattern.coords[2])) +
        " " + // x2
        hpf(parseFloat(pattern.coords[3])); // y2
    } else {
      // radial
      coords +=
        hpf(parseFloat(pattern.coords[2])) +
        " " + // r1
        hpf(parseFloat(pattern.coords[3])) +
        " " + // x2
        hpf(parseFloat(pattern.coords[4])) +
        " " + // y2
        hpf(parseFloat(pattern.coords[5])); // r2
    }
    coords += "]";
    out(coords);

    if (pattern.matrix) {
      out("/Matrix [" + pattern.matrix.toString() + "]");
    }
    out("/Function " + funcObjectNumber + " 0 R");
    out("/Extend [true true]");
    out(">>");
    out("endobj");
  };

  var putTilingPattern = function(pattern, deferredResourceDictionaryIds) {
    var resourcesObjectId = newObjectDeferred();
    var patternObjectId = newObject();

    deferredResourceDictionaryIds.push({
      resourcesOid: resourcesObjectId,
      objectOid: patternObjectId
    });

    pattern.objectNumber = patternObjectId;
    var options = [];
    options.push({ key: "Type", value: "/Pattern" });
    options.push({ key: "PatternType", value: "1" }); // tiling pattern
    options.push({ key: "PaintType", value: "1" }); // colored tiling pattern
    options.push({ key: "TilingType", value: "1" }); // constant spacing
    options.push({
      key: "BBox",
      value: "[" + pattern.boundingBox.map(hpf).join(" ") + "]"
    });
    options.push({ key: "XStep", value: hpf(pattern.xStep) });
    options.push({ key: "YStep", value: hpf(pattern.yStep) });
    options.push({ key: "Resources", value: resourcesObjectId + " 0 R" });
    if (pattern.matrix) {
      options.push({
        key: "Matrix",
        value: "[" + pattern.matrix.toString() + "]"
      });
    }

    putStream({
      data: pattern.stream,
      additionalKeyValues: options,
      objectId: pattern.objectNumber
    });
    out("endobj");
  };

  var putPatterns = function(deferredResourceDictionaryIds) {
    var patternKey;
    for (patternKey in patterns) {
      if (patterns.hasOwnProperty(patternKey)) {
        if (patterns[patternKey] instanceof ShadingPattern) {
          putShadingPattern(patterns[patternKey]);
        } else if (patterns[patternKey] instanceof TilingPattern) {
          putTilingPattern(patterns[patternKey], deferredResourceDictionaryIds);
        }
      }
    }
  };

  var putGState = function(gState) {
    gState.objectNumber = newObject();
    out("<<");
    for (var p in gState) {
      switch (p) {
        case "opacity":
          out("/ca " + f2(gState[p]));
          break;
        case "stroke-opacity":
          out("/CA " + f2(gState[p]));
          break;
      }
    }
    out(">>");
    out("endobj");
  };

  var putGStates = function() {
    var gStateKey;
    for (gStateKey in gStates) {
      if (gStates.hasOwnProperty(gStateKey)) {
        putGState(gStates[gStateKey]);
      }
    }
  };

  var putXobjectDict = function() {
    out("/XObject <<");
    for (var xObjectKey in renderTargets) {
      if (
        renderTargets.hasOwnProperty(xObjectKey) &&
        renderTargets[xObjectKey].objectNumber >= 0
      ) {
        out(
          "/" +
            xObjectKey +
            " " +
            renderTargets[xObjectKey].objectNumber +
            " 0 R"
        );
      }
    }

    // Loop through images, or other data objects
    events.publish("putXobjectDict");
    out(">>");
  };

  var putEncryptionDict = function() {
    encryption.oid = newObject();
    out("<<");
    out("/Filter /Standard");
    out("/V " + encryption.v);
    out("/R " + encryption.r);
    out("/U <" + encryption.toHexString(encryption.U) + ">");
    out("/O <" + encryption.toHexString(encryption.O) + ">");
    out("/P " + encryption.P);
    out(">>");
    out("endobj");
  };

  var putFontDict = function() {
    out("/Font <<");

    for (var fontKey in fonts) {
      if (fonts.hasOwnProperty(fontKey)) {
        if (
          putOnlyUsedFonts === false ||
          (putOnlyUsedFonts === true && usedFonts.hasOwnProperty(fontKey))
        ) {
          out("/" + fontKey + " " + fonts[fontKey].objectNumber + " 0 R");
        }
      }
    }
    out(">>");
  };

  var putShadingPatternDict = function() {
    if (Object.keys(patterns).length > 0) {
      out("/Shading <<");
      for (var patternKey in patterns) {
        if (
          patterns.hasOwnProperty(patternKey) &&
          patterns[patternKey] instanceof ShadingPattern &&
          patterns[patternKey].objectNumber >= 0
        ) {
          out(
            "/" + patternKey + " " + patterns[patternKey].objectNumber + " 0 R"
          );
        }
      }

      events.publish("putShadingPatternDict");
      out(">>");
    }
  };

  var putTilingPatternDict = function(objectOid) {
    if (Object.keys(patterns).length > 0) {
      out("/Pattern <<");
      for (var patternKey in patterns) {
        if (
          patterns.hasOwnProperty(patternKey) &&
          patterns[patternKey] instanceof API.TilingPattern &&
          patterns[patternKey].objectNumber >= 0 &&
          patterns[patternKey].objectNumber < objectOid // prevent cyclic dependencies
        ) {
          out(
            "/" + patternKey + " " + patterns[patternKey].objectNumber + " 0 R"
          );
        }
      }
      events.publish("putTilingPatternDict");
      out(">>");
    }
  };

  var putGStatesDict = function() {
    if (Object.keys(gStates).length > 0) {
      var gStateKey;
      out("/ExtGState <<");
      for (gStateKey in gStates) {
        if (
          gStates.hasOwnProperty(gStateKey) &&
          gStates[gStateKey].objectNumber >= 0
        ) {
          out("/" + gStateKey + " " + gStates[gStateKey].objectNumber + " 0 R");
        }
      }

      events.publish("putGStateDict");
      out(">>");
    }
  };

  var putResourceDictionary = function(objectIds) {
    newObjectDeferredBegin(objectIds.resourcesOid, true);
    out("<<");
    out("/ProcSet [/PDF /Text /ImageB /ImageC /ImageI]");
    putFontDict();
    putShadingPatternDict();
    putTilingPatternDict(objectIds.objectOid);
    putGStatesDict();
    putXobjectDict();
    out(">>");
    out("endobj");
  };

  var putResources = function() {
    // FormObjects, Patterns etc. might use other FormObjects/Patterns/Images
    // which means their resource dictionaries must contain the already resolved
    // object ids. For this reason we defer the serialization of the resource
    // dicts until all objects have been serialized and have object ids.
    //
    // In order to prevent cyclic dependencies (which Adobe Reader doesn't like),
    // we only put all oids that are smaller than the oid of the object the
    // resource dict belongs to. This is correct behavior, since the streams
    // may only use other objects that have already been defined and thus appear
    // earlier in their respective collection.
    // Currently, this only affects tiling patterns, but a (more) correct
    // implementation of FormObjects would also define their own resource dicts.
    var deferredResourceDictionaryIds = [];

    putFonts();
    putGStates();
    putXObjects();
    putPatterns(deferredResourceDictionaryIds);

    events.publish("putResources");
    deferredResourceDictionaryIds.forEach(putResourceDictionary);
    putResourceDictionary({
      resourcesOid: resourceDictionaryObjId,
      objectOid: Number.MAX_SAFE_INTEGER // output all objects
    });
    events.publish("postPutResources");
  };

  var putAdditionalObjects = function() {
    events.publish("putAdditionalObjects");
    for (var i = 0; i < additionalObjects.length; i++) {
      var obj = additionalObjects[i];
      newObjectDeferredBegin(obj.objId, true);
      out(obj.content);
      out("endobj");
    }
    events.publish("postPutAdditionalObjects");
  };

  var addFontToFontDictionary = function(font) {
    fontmap[font.fontName] = fontmap[font.fontName] || {};
    fontmap[font.fontName][font.fontStyle] = font.id;
  };

  var addFont = function(
    postScriptName,
    fontName,
    fontStyle,
    encoding,
    isStandardFont
  ) {
    var font = {
      id: "F" + (Object.keys(fonts).length + 1).toString(10),
      postScriptName: postScriptName,
      fontName: fontName,
      fontStyle: fontStyle,
      encoding: encoding,
      isStandardFont: isStandardFont || false,
      metadata: {}
    };

    events.publish("addFont", {
      font: font,
      instance: this
    });

    fonts[font.id] = font;
    addFontToFontDictionary(font);
    return font.id;
  };

  var addFonts = function(arrayOfFonts) {
    for (var i = 0, l = standardFonts.length; i < l; i++) {
      var fontKey = addFont.call(
        this,
        arrayOfFonts[i][0],
        arrayOfFonts[i][1],
        arrayOfFonts[i][2],
        standardFonts[i][3],
        true
      );

      if (putOnlyUsedFonts === false) {
        usedFonts[fontKey] = true;
      }
      // adding aliases for standard fonts, this time matching the capitalization
      var parts = arrayOfFonts[i][0].split("-");
      addFontToFontDictionary({
        id: fontKey,
        fontName: parts[0],
        fontStyle: parts[1] || ""
      });
    }
    events.publish("addFonts", {
      fonts: fonts,
      dictionary: fontmap
    });
  };

  var SAFE = function __safeCall(fn) {
    fn.foo = function __safeCallWrapper() {
      try {
        return fn.apply(this, arguments);
      } catch (e) {
        var stack = e.stack || "";
        if (~stack.indexOf(" at ")) stack = stack.split(" at ")[1];
        var m =
          "Error in function " +
          stack.split("\n")[0].split("<")[0] +
          ": " +
          e.message;
        if (globalObject.console) {
          globalObject.console.error(m, e);
          if (globalObject.alert) alert(m);
        } else {
          throw new Error(m);
        }
      }
    };
    fn.foo.bar = fn;
    return fn.foo;
  };

  var to8bitStream = function(text, flags) {
    /**
     * PDF 1.3 spec:
     * "For text strings encoded in Unicode, the first two bytes must be 254 followed by
     * 255, representing the Unicode byte order marker, U+FEFF. (This sequence conflicts
     * with the PDFDocEncoding character sequence thorn ydieresis, which is unlikely
     * to be a meaningful beginning of a word or phrase.) The remainder of the
     * string consists of Unicode character codes, according to the UTF-16 encoding
     * specified in the Unicode standard, version 2.0. Commonly used Unicode values
     * are represented as 2 bytes per character, with the high-order byte appearing first
     * in the string."
     *
     * In other words, if there are chars in a string with char code above 255, we
     * recode the string to UCS2 BE - string doubles in length and BOM is prepended.
     *
     * HOWEVER!
     * Actual *content* (body) text (as opposed to strings used in document properties etc)
     * does NOT expect BOM. There, it is treated as a literal GID (Glyph ID)
     *
     * Because of Adobe's focus on "you subset your fonts!" you are not supposed to have
     * a font that maps directly Unicode (UCS2 / UTF16BE) code to font GID, but you could
     * fudge it with "Identity-H" encoding and custom CIDtoGID map that mimics Unicode
     * code page. There, however, all characters in the stream are treated as GIDs,
     * including BOM, which is the reason we need to skip BOM in content text (i.e. that
     * that is tied to a font).
     *
     * To signal this "special" PDFEscape / to8bitStream handling mode,
     * API.text() function sets (unless you overwrite it with manual values
     * given to API.text(.., flags) )
     * flags.autoencode = true
     * flags.noBOM = true
     *
     * ===================================================================================
     * `flags` properties relied upon:
     *   .sourceEncoding = string with encoding label.
     *                     "Unicode" by default. = encoding of the incoming text.
     *                     pass some non-existing encoding name
     *                     (ex: 'Do not touch my strings! I know what I am doing.')
     *                     to make encoding code skip the encoding step.
     *   .outputEncoding = Either valid PDF encoding name
     *                     (must be supported by jsPDF font metrics, otherwise no encoding)
     *                     or a JS object, where key = sourceCharCode, value = outputCharCode
     *                     missing keys will be treated as: sourceCharCode === outputCharCode
     *   .noBOM
     *       See comment higher above for explanation for why this is important
     *   .autoencode
     *       See comment higher above for explanation for why this is important
     */

    var i,
      l,
      sourceEncoding,
      encodingBlock,
      outputEncoding,
      newtext,
      isUnicode,
      ch,
      bch;

    flags = flags || {};
    sourceEncoding = flags.sourceEncoding || "Unicode";
    outputEncoding = flags.outputEncoding;

    // This 'encoding' section relies on font metrics format
    // attached to font objects by, among others,
    // "Willow Systems' standard_font_metrics plugin"
    // see jspdf.plugin.standard_font_metrics.js for format
    // of the font.metadata.encoding Object.
    // It should be something like
    //   .encoding = {'codePages':['WinANSI....'], 'WinANSI...':{code:code, ...}}
    //   .widths = {0:width, code:width, ..., 'fof':divisor}
    //   .kerning = {code:{previous_char_code:shift, ..., 'fof':-divisor},...}
    if (
      (flags.autoencode || outputEncoding) &&
      fonts[activeFontKey].metadata &&
      fonts[activeFontKey].metadata[sourceEncoding] &&
      fonts[activeFontKey].metadata[sourceEncoding].encoding
    ) {
      encodingBlock = fonts[activeFontKey].metadata[sourceEncoding].encoding;

      // each font has default encoding. Some have it clearly defined.
      if (!outputEncoding && fonts[activeFontKey].encoding) {
        outputEncoding = fonts[activeFontKey].encoding;
      }

      // Hmmm, the above did not work? Let's try again, in different place.
      if (!outputEncoding && encodingBlock.codePages) {
        outputEncoding = encodingBlock.codePages[0]; // let's say, first one is the default
      }

      if (typeof outputEncoding === "string") {
        outputEncoding = encodingBlock[outputEncoding];
      }
      // we want output encoding to be a JS Object, where
      // key = sourceEncoding's character code and
      // value = outputEncoding's character code.
      if (outputEncoding) {
        isUnicode = false;
        newtext = [];
        for (i = 0, l = text.length; i < l; i++) {
          ch = outputEncoding[text.charCodeAt(i)];
          if (ch) {
            newtext.push(String.fromCharCode(ch));
          } else {
            newtext.push(text[i]);
          }

          // since we are looping over chars anyway, might as well
          // check for residual unicodeness
          if (newtext[i].charCodeAt(0) >> 8) {
            /* more than 255 */
            isUnicode = true;
          }
        }
        text = newtext.join("");
      }
    }

    i = text.length;
    // isUnicode may be set to false above. Hence the triple-equal to undefined
    while (isUnicode === undefined && i !== 0) {
      if (text.charCodeAt(i - 1) >> 8) {
        /* more than 255 */
        isUnicode = true;
      }
      i--;
    }
    if (!isUnicode) {
      return text;
    }

    newtext = flags.noBOM ? [] : [254, 255];
    for (i = 0, l = text.length; i < l; i++) {
      ch = text.charCodeAt(i);
      bch = ch >> 8; // divide by 256
      if (bch >> 8) {
        /* something left after dividing by 256 second time */
        throw new Error(
          "Character at position " +
            i +
            " of string '" +
            text +
            "' exceeds 16bits. Cannot be encoded into UCS-2 BE"
        );
      }
      newtext.push(bch);
      newtext.push(ch - (bch << 8));
    }
    return String.fromCharCode.apply(undefined, newtext);
  };

  var pdfEscape = (API.__private__.pdfEscape = API.pdfEscape = function(
    text,
    flags
  ) {
    /**
     * Replace '/', '(', and ')' with pdf-safe versions
     *
     * Doing to8bitStream does NOT make this PDF display unicode text. For that
     * we also need to reference a unicode font and embed it - royal pain in the rear.
     *
     * There is still a benefit to to8bitStream - PDF simply cannot handle 16bit chars,
     * which JavaScript Strings are happy to provide. So, while we still cannot display
     * 2-byte characters property, at least CONDITIONALLY converting (entire string containing)
     * 16bit chars to (USC-2-BE) 2-bytes per char + BOM streams we ensure that entire PDF
     * is still parseable.
     * This will allow immediate support for unicode in document properties strings.
     */
    return to8bitStream(text, flags)
      .replace(/\\/g, "\\\\")
      .replace(/\(/g, "\\(")
      .replace(/\)/g, "\\)");
  });

  var beginPage = (API.__private__.beginPage = function(format) {
    pages[++page] = [];
    pagesContext[page] = {
      objId: 0,
      contentsObjId: 0,
      userUnit: Number(userUnit),
      artBox: null,
      bleedBox: null,
      cropBox: null,
      trimBox: null,
      mediaBox: {
        bottomLeftX: 0,
        bottomLeftY: 0,
        topRightX: Number(format[0]),
        topRightY: Number(format[1])
      }
    };
    _setPage(page);
    setOutputDestination(pages[currentPage]);
  });

  var _addPage = function(parmFormat, parmOrientation) {
    var dimensions, width, height;

    orientation = parmOrientation || orientation;

    if (typeof parmFormat === "string") {
      dimensions = getPageFormat(parmFormat.toLowerCase());
      if (Array.isArray(dimensions)) {
        width = dimensions[0];
        height = dimensions[1];
      }
    }

    if (Array.isArray(parmFormat)) {
      width = parmFormat[0] * scaleFactor;
      height = parmFormat[1] * scaleFactor;
    }

    if (isNaN(width)) {
      width = format[0];
      height = format[1];
    }

    if (width > 14400 || height > 14400) {
      console.warn(
        "A page in a PDF can not be wider or taller than 14400 userUnit. jsPDF limits the width/height to 14400"
      );
      width = Math.min(14400, width);
      height = Math.min(14400, height);
    }

    format = [width, height];

    switch (orientation.substr(0, 1)) {
      case "l":
        if (height > width) {
          format = [height, width];
        }
        break;
      case "p":
        if (width > height) {
          format = [height, width];
        }
        break;
    }

    beginPage(format);

    // Set line width
    setLineWidth(lineWidth);
    // Set draw color
    out(strokeColor);
    // resurrecting non-default line caps, joins
    if (lineCapID !== 0) {
      out(lineCapID + " J");
    }
    if (lineJoinID !== 0) {
      out(lineJoinID + " j");
    }
    events.publish("addPage", {
      pageNumber: page
    });
  };

  var _deletePage = function(n) {
    if (n > 0 && n <= page) {
      pages.splice(n, 1);
      pagesContext.splice(n, 1);
      page--;
      if (currentPage > page) {
        currentPage = page;
      }
      this.setPage(currentPage);
    }
  };

  var _setPage = function(n) {
    if (n > 0 && n <= page) {
      currentPage = n;
    }
  };

  var getNumberOfPages = (API.__private__.getNumberOfPages = API.getNumberOfPages = function() {
    return pages.length - 1;
  });

  /**
   * Returns a document-specific font key - a label assigned to a
   * font name + font type combination at the time the font was added
   * to the font inventory.
   *
   * Font key is used as label for the desired font for a block of text
   * to be added to the PDF document stream.
   * @private
   * @function
   * @param fontName {string} can be undefined on "falthy" to indicate "use current"
   * @param fontStyle {string} can be undefined on "falthy" to indicate "use current"
   * @returns {string} Font key.
   * @ignore
   */
  var getFont = function(fontName, fontStyle, options) {
    var key = undefined,
      fontNameLowerCase;
    options = options || {};

    fontName =
      fontName !== undefined ? fontName : fonts[activeFontKey].fontName;
    fontStyle =
      fontStyle !== undefined ? fontStyle : fonts[activeFontKey].fontStyle;
    fontNameLowerCase = fontName.toLowerCase();

    if (
      fontmap[fontNameLowerCase] !== undefined &&
      fontmap[fontNameLowerCase][fontStyle] !== undefined
    ) {
      key = fontmap[fontNameLowerCase][fontStyle];
    } else if (
      fontmap[fontName] !== undefined &&
      fontmap[fontName][fontStyle] !== undefined
    ) {
      key = fontmap[fontName][fontStyle];
    } else {
      if (options.disableWarning === false) {
        console.warn(
          "Unable to look up font label for font '" +
            fontName +
            "', '" +
            fontStyle +
            "'. Refer to getFontList() for available fonts."
        );
      }
    }

    if (!key && !options.noFallback) {
      key = fontmap["times"][fontStyle];
      if (key == null) {
        key = fontmap["times"]["normal"];
      }
    }
    return key;
  };

  var putInfo = (API.__private__.putInfo = function() {
    var objectId = newObject();
    var encryptor = function(data) {
      return data;
    };
    if (encryptionOptions !== null) {
      encryptor = encryption.encryptor(objectId, 0);
    }
    out("<<");
    out("/Producer (" + pdfEscape(encryptor("jsPDF " + jsPDF.version)) + ")");
    for (var key in documentProperties) {
      if (documentProperties.hasOwnProperty(key) && documentProperties[key]) {
        out(
          "/" +
            key.substr(0, 1).toUpperCase() +
            key.substr(1) +
            " (" +
            pdfEscape(encryptor(documentProperties[key])) +
            ")"
        );
      }
    }
    out("/CreationDate (" + pdfEscape(encryptor(creationDate)) + ")");
    out(">>");
    out("endobj");
  });

  var putCatalog = (API.__private__.putCatalog = function(options) {
    options = options || {};
    var tmpRootDictionaryObjId =
      options.rootDictionaryObjId || rootDictionaryObjId;
    newObject();
    out("<<");
    out("/Type /Catalog");
    out("/Pages " + tmpRootDictionaryObjId + " 0 R");
    // PDF13ref Section 7.2.1
    if (!zoomMode) zoomMode = "fullwidth";
    switch (zoomMode) {
      case "fullwidth":
        out("/OpenAction [3 0 R /FitH null]");
        break;
      case "fullheight":
        out("/OpenAction [3 0 R /FitV null]");
        break;
      case "fullpage":
        out("/OpenAction [3 0 R /Fit]");
        break;
      case "original":
        out("/OpenAction [3 0 R /XYZ null null 1]");
        break;
      default:
        var pcn = "" + zoomMode;
        if (pcn.substr(pcn.length - 1) === "%")
          zoomMode = parseInt(zoomMode) / 100;
        if (typeof zoomMode === "number") {
          out("/OpenAction [3 0 R /XYZ null null " + f2(zoomMode) + "]");
        }
    }
    if (!layoutMode) layoutMode = "continuous";
    switch (layoutMode) {
      case "continuous":
        out("/PageLayout /OneColumn");
        break;
      case "single":
        out("/PageLayout /SinglePage");
        break;
      case "two":
      case "twoleft":
        out("/PageLayout /TwoColumnLeft");
        break;
      case "tworight":
        out("/PageLayout /TwoColumnRight");
        break;
    }
    if (pageMode) {
      /**
       * A name object specifying how the document should be displayed when opened:
       * UseNone      : Neither document outline nor thumbnail images visible -- DEFAULT
       * UseOutlines  : Document outline visible
       * UseThumbs    : Thumbnail images visible
       * FullScreen   : Full-screen mode, with no menu bar, window controls, or any other window visible
       */
      out("/PageMode /" + pageMode);
    }
    events.publish("putCatalog");
    out(">>");
    out("endobj");
  });

  var putTrailer = (API.__private__.putTrailer = function() {
    out("trailer");
    out("<<");
    out("/Size " + (objectNumber + 1));
    // Root and Info must be the last and second last objects written respectively
    out("/Root " + objectNumber + " 0 R");
    out("/Info " + (objectNumber - 1) + " 0 R");
    if (encryptionOptions !== null) {
      out("/Encrypt " + encryption.oid + " 0 R");
    }
    out("/ID [ <" + fileId + "> <" + fileId + "> ]");
    out(">>");
  });

  var putHeader = (API.__private__.putHeader = function() {
    out("%PDF-" + pdfVersion);
    out("%\xBA\xDF\xAC\xE0");
  });

  var putXRef = (API.__private__.putXRef = function() {
    var p = "0000000000";

    out("xref");
    out("0 " + (objectNumber + 1));
    out("0000000000 65535 f ");
    for (var i = 1; i <= objectNumber; i++) {
      var offset = offsets[i];
      if (typeof offset === "function") {
        out((p + offsets[i]()).slice(-10) + " 00000 n ");
      } else {
        if (typeof offsets[i] !== "undefined") {
          out((p + offsets[i]).slice(-10) + " 00000 n ");
        } else {
          out("0000000000 00000 n ");
        }
      }
    }
  });

  var buildDocument = (API.__private__.buildDocument = function() {
    resetDocument();
    setOutputDestination(content);

    events.publish("buildDocument");

    putHeader();
    putPages();
    putAdditionalObjects();
    putResources();
    if (encryptionOptions !== null) putEncryptionDict();
    putInfo();
    putCatalog();

    var offsetOfXRef = contentLength;
    putXRef();
    putTrailer();
    out("startxref");
    out("" + offsetOfXRef);
    out("%%EOF");

    setOutputDestination(pages[currentPage]);

    return content.join("\n");
  });

  var getBlob = (API.__private__.getBlob = function(data) {
    return new Blob([getArrayBuffer(data)], {
      type: "application/pdf"
    });
  });

  /**
   * Generates the PDF document.
   *
   * If `type` argument is undefined, output is raw body of resulting PDF returned as a string.
   *
   * @param {string} type A string identifying one of the possible output types.<br/>
   *                      Possible values are: <br/>
   *                          'arraybuffer' -> (ArrayBuffer)<br/>
   *                          'blob' -> (Blob)<br/>
   *                          'bloburi'/'bloburl' -> (string)<br/>
   *                          'datauristring'/'dataurlstring' -> (string)<br/>
   *                          'datauri'/'dataurl' -> (undefined) -> change location to generated datauristring/dataurlstring<br/>
   *                          'dataurlnewwindow' -> (window | null | undefined) throws error if global isn't a window object(node)<br/>
   *                          'pdfobjectnewwindow' -> (window | null) throws error if global isn't a window object(node)<br/>
   *                          'pdfjsnewwindow' -> (wind | null)
   * @param {Object|string} options An object providing some additional signalling to PDF generator.<br/>
   *                                Possible options are 'filename'.<br/>
   *                                A string can be passed instead of {filename:string} and defaults to 'generated.pdf'
   * @function
   * @instance
   * @returns {string|window|ArrayBuffer|Blob|jsPDF|null|undefined}
   * @memberof jsPDF#
   * @name output
   */
  var output = (API.output = API.__private__.output = SAFE(function output(
    type,
    options
  ) {
    options = options || {};

    if (typeof options === "string") {
      options = {
        filename: options
      };
    } else {
      options.filename = options.filename || "generated.pdf";
    }

    switch (type) {
      case undefined:
        return buildDocument();
      case "save":
        API.save(options.filename);
        break;
      case "arraybuffer":
        return getArrayBuffer(buildDocument());
      case "blob":
        return getBlob(buildDocument());
      case "bloburi":
      case "bloburl":
        // Developer is responsible of calling revokeObjectURL
        if (
          typeof globalObject.URL !== "undefined" &&
          typeof globalObject.URL.createObjectURL === "function"
        ) {
          return (
            (globalObject.URL &&
              globalObject.URL.createObjectURL(getBlob(buildDocument()))) ||
            void 0
          );
        } else {
          console.warn(
            "bloburl is not supported by your system, because URL.createObjectURL is not supported by your browser."
          );
        }
        break;
      case "datauristring":
      case "dataurlstring":
        var dataURI = "";
        var pdfDocument = buildDocument();
        try {
          dataURI = btoa(pdfDocument);
        } catch (e) {
          dataURI = btoa(unescape(encodeURIComponent(pdfDocument)));
        }
        return (
          "data:application/pdf;filename=" +
          options.filename +
          ";base64," +
          dataURI
        );
      case "pdfobjectnewwindow":
        if (
          Object.prototype.toString.call(globalObject) === "[object Window]"
        ) {
          var pdfObjectUrl =
            "https://cdnjs.cloudflare.com/ajax/libs/pdfobject/2.1.1/pdfobject.min.js";
          var integrity =
            ' integrity="sha512-4ze/a9/4jqu+tX9dfOqJYSvyYd5M6qum/3HpCLr+/Jqf0whc37VUbkpNGHR7/8pSnCFw47T1fmIpwBV7UySh3g==" crossorigin="anonymous"';

          if (options.pdfObjectUrl) {
            pdfObjectUrl = options.pdfObjectUrl;
            integrity = "";
          }

          var htmlForNewWindow =
            "<html>" +
            '<style>html, body { padding: 0; margin: 0; } iframe { width: 100%; height: 100%; border: 0;}  </style><body><script src="' +
            pdfObjectUrl +
            '"' +
            integrity +
            '></script><script >PDFObject.embed("' +
            this.output("dataurlstring") +
            '", ' +
            JSON.stringify(options) +
            ");</script></body></html>";
          var nW = globalObject.open();

          if (nW !== null) {
            nW.document.write(htmlForNewWindow);
          }
          return nW;
        } else {
          throw new Error(
            "The option pdfobjectnewwindow just works in a browser-environment."
          );
        }
      case "pdfjsnewwindow":
        if (
          Object.prototype.toString.call(globalObject) === "[object Window]"
        ) {
          var pdfJsUrl = options.pdfJsUrl || "examples/PDF.js/web/viewer.html";
          var htmlForPDFjsNewWindow =
            "<html>" +
            "<style>html, body { padding: 0; margin: 0; } iframe { width: 100%; height: 100%; border: 0;}  </style>" +
            '<body><iframe id="pdfViewer" src="' +
            pdfJsUrl +
            "?file=&downloadName=" +
            options.filename +
            '" width="500px" height="400px" />' +
            "</body></html>";
          var PDFjsNewWindow = globalObject.open();

          if (PDFjsNewWindow !== null) {
            PDFjsNewWindow.document.write(htmlForPDFjsNewWindow);
            var scope = this;
            PDFjsNewWindow.document.documentElement.querySelector(
              "#pdfViewer"
            ).onload = function() {
              PDFjsNewWindow.document.title = options.filename;
              PDFjsNewWindow.document.documentElement
                .querySelector("#pdfViewer")
                .contentWindow.PDFViewerApplication.open(
                  scope.output("bloburl")
                );
            };
          }
          return PDFjsNewWindow;
        } else {
          throw new Error(
            "The option pdfjsnewwindow just works in a browser-environment."
          );
        }
      case "dataurlnewwindow":
        if (
          Object.prototype.toString.call(globalObject) === "[object Window]"
        ) {
          var htmlForDataURLNewWindow =
            "<html>" +
            "<style>html, body { padding: 0; margin: 0; } iframe { width: 100%; height: 100%; border: 0;}  </style>" +
            "<body>" +
            '<iframe src="' +
            this.output("datauristring", options) +
            '"></iframe>' +
            "</body></html>";
          var dataURLNewWindow = globalObject.open();
          if (dataURLNewWindow !== null) {
            dataURLNewWindow.document.write(htmlForDataURLNewWindow);
            dataURLNewWindow.document.title = options.filename;
          }
          if (dataURLNewWindow || typeof safari === "undefined")
            return dataURLNewWindow;
        } else {
          throw new Error(
            "The option dataurlnewwindow just works in a browser-environment."
          );
        }
        break;
      case "datauri":
      case "dataurl":
        return (globalObject.document.location.href = this.output(
          "datauristring",
          options
        ));
      default:
        return null;
    }
  }));

  /**
   * Used to see if a supplied hotfix was requested when the pdf instance was created.
   * @param {string} hotfixName - The name of the hotfix to check.
   * @returns {boolean}
   */
  var hasHotfix = function(hotfixName) {
    return (
      Array.isArray(hotfixes) === true && hotfixes.indexOf(hotfixName) > -1
    );
  };

  switch (unit) {
    case "pt":
      scaleFactor = 1;
      break;
    case "mm":
      scaleFactor = 72 / 25.4;
      break;
    case "cm":
      scaleFactor = 72 / 2.54;
      break;
    case "in":
      scaleFactor = 72;
      break;
    case "px":
      if (hasHotfix("px_scaling") == true) {
        scaleFactor = 72 / 96;
      } else {
        scaleFactor = 96 / 72;
      }
      break;
    case "pc":
      scaleFactor = 12;
      break;
    case "em":
      scaleFactor = 12;
      break;
    case "ex":
      scaleFactor = 6;
      break;
    default:
      if (typeof unit === "number") {
        scaleFactor = unit;
      } else {
        throw new Error("Invalid unit: " + unit);
      }
  }

  var encryption = null;
  setCreationDate();
  setFileId();

  var getEncryptor = function(objectId) {
    if (encryptionOptions !== null) {
      return encryption.encryptor(objectId, 0);
    }
    return function(data) {
      return data;
    };
  };

  //---------------------------------------
  // Public API

  var getPageInfo = (API.__private__.getPageInfo = API.getPageInfo = function(
    pageNumberOneBased
  ) {
    if (isNaN(pageNumberOneBased) || pageNumberOneBased % 1 !== 0) {
      throw new Error("Invalid argument passed to jsPDF.getPageInfo");
    }
    var objId = pagesContext[pageNumberOneBased].objId;
    return {
      objId: objId,
      pageNumber: pageNumberOneBased,
      pageContext: pagesContext[pageNumberOneBased]
    };
  });

  var getPageInfoByObjId = (API.__private__.getPageInfoByObjId = function(
    objId
  ) {
    if (isNaN(objId) || objId % 1 !== 0) {
      throw new Error("Invalid argument passed to jsPDF.getPageInfoByObjId");
    }
    for (var pageNumber in pagesContext) {
      if (pagesContext[pageNumber].objId === objId) {
        break;
      }
    }
    return getPageInfo(pageNumber);
  });

  var getCurrentPageInfo = (API.__private__.getCurrentPageInfo = API.getCurrentPageInfo = function() {
    return {
      objId: pagesContext[currentPage].objId,
      pageNumber: currentPage,
      pageContext: pagesContext[currentPage]
    };
  });

  /**
   * Adds (and transfers the focus to) new page to the PDF document.
   * @param format {String/Array} The format of the new page. Can be: <ul><li>a0 - a10</li><li>b0 - b10</li><li>c0 - c10</li><li>dl</li><li>letter</li><li>government-letter</li><li>legal</li><li>junior-legal</li><li>ledger</li><li>tabloid</li><li>credit-card</li></ul><br />
   * Default is "a4". If you want to use your own format just pass instead of one of the above predefined formats the size as an number-array, e.g. [595.28, 841.89]
   * @param orientation {string} Orientation of the new page. Possible values are "portrait" or "landscape" (or shortcuts "p" (Default), "l").
   * @function
   * @instance
   * @returns {jsPDF}
   *
   * @memberof jsPDF#
   * @name addPage
   */
  API.addPage = function() {
    _addPage.apply(this, arguments);
    return this;
  };
  /**
   * Adds (and transfers the focus to) new page to the PDF document.
   * @function
   * @instance
   * @returns {jsPDF}
   *
   * @memberof jsPDF#
   * @name setPage
   * @param {number} page Switch the active page to the page number specified (indexed starting at 1).
   * @example
   * doc = jsPDF()
   * doc.addPage()
   * doc.addPage()
   * doc.text('I am on page 3', 10, 10)
   * doc.setPage(1)
   * doc.text('I am on page 1', 10, 10)
   */
  API.setPage = function() {
    _setPage.apply(this, arguments);
    setOutputDestination.call(this, pages[currentPage]);
    return this;
  };

  /**
   * @name insertPage
   * @memberof jsPDF#
   *
   * @function
   * @instance
   * @param {Object} beforePage
   * @returns {jsPDF}
   */
  API.insertPage = function(beforePage) {
    this.addPage();
    this.movePage(currentPage, beforePage);
    return this;
  };

  /**
   * @name movePage
   * @memberof jsPDF#
   * @function
   * @instance
   * @param {number} targetPage
   * @param {number} beforePage
   * @returns {jsPDF}
   */
  API.movePage = function(targetPage, beforePage) {
    var tmpPages, tmpPagesContext;
    if (targetPage > beforePage) {
      tmpPages = pages[targetPage];
      tmpPagesContext = pagesContext[targetPage];
      for (var i = targetPage; i > beforePage; i--) {
        pages[i] = pages[i - 1];
        pagesContext[i] = pagesContext[i - 1];
      }
      pages[beforePage] = tmpPages;
      pagesContext[beforePage] = tmpPagesContext;
      this.setPage(beforePage);
    } else if (targetPage < beforePage) {
      tmpPages = pages[targetPage];
      tmpPagesContext = pagesContext[targetPage];
      for (var j = targetPage; j < beforePage; j++) {
        pages[j] = pages[j + 1];
        pagesContext[j] = pagesContext[j + 1];
      }
      pages[beforePage] = tmpPages;
      pagesContext[beforePage] = tmpPagesContext;
      this.setPage(beforePage);
    }
    return this;
  };

  /**
   * Deletes a page from the PDF.
   * @name deletePage
   * @memberof jsPDF#
   * @function
   * @param {number} targetPage
   * @instance
   * @returns {jsPDF}
   */
  API.deletePage = function() {
    _deletePage.apply(this, arguments);
    return this;
  };

  /**
   * Adds text to page. Supports adding multiline text when 'text' argument is an Array of Strings.
   *
   * @function
   * @instance
   * @param {String|Array} text String or array of strings to be added to the page. Each line is shifted one line down per font, spacing settings declared before this call.
   * @param {number} x Coordinate (in units declared at inception of PDF document) against left edge of the page.
   * @param {number} y Coordinate (in units declared at inception of PDF document) against upper edge of the page.
   * @param {Object} [options] - Collection of settings signaling how the text must be encoded.
   * @param {string} [options.align=left] - The alignment of the text, possible values: left, center, right, justify.
   * @param {string} [options.baseline=alphabetic] - Sets text baseline used when drawing the text, possible values: alphabetic, ideographic, bottom, top, middle, hanging
   * @param {number|Matrix} [options.angle=0] - Rotate the text clockwise or counterclockwise. Expects the angle in degree.
   * @param {number} [options.rotationDirection=1] - Direction of the rotation. 0 = clockwise, 1 = counterclockwise.
   * @param {number} [options.charSpace=0] - The space between each letter.
   * @param {number} [options.horizontalScale=1] - Horizontal scale of the text as a factor of the regular size.
   * @param {number} [options.lineHeightFactor=1.15] - The lineheight of each line.
   * @param {Object} [options.flags] - Flags for to8bitStream.
   * @param {boolean} [options.flags.noBOM=true] - Don't add BOM to Unicode-text.
   * @param {boolean} [options.flags.autoencode=true] - Autoencode the Text.
   * @param {number} [options.maxWidth=0] - Split the text by given width, 0 = no split.
   * @param {string} [options.renderingMode=fill] - Set how the text should be rendered, possible values: fill, stroke, fillThenStroke, invisible, fillAndAddForClipping, strokeAndAddPathForClipping, fillThenStrokeAndAddToPathForClipping, addToPathForClipping.
   * @param {boolean} [options.isInputVisual] - Option for the BidiEngine
   * @param {boolean} [options.isOutputVisual] - Option for the BidiEngine
   * @param {boolean} [options.isInputRtl] - Option for the BidiEngine
   * @param {boolean} [options.isOutputRtl] - Option for the BidiEngine
   * @param {boolean} [options.isSymmetricSwapping] - Option for the BidiEngine
   * @param {number|Matrix} transform If transform is a number the text will be rotated by this value around the anchor set by x and y.
   *
   * If it is a Matrix, this matrix gets directly applied to the text, which allows shearing
   * effects etc.; the x and y offsets are then applied AFTER the coordinate system has been established by this
   * matrix. This means passing a rotation matrix that is equivalent to some rotation angle will in general yield a
   * DIFFERENT result. A matrix is only allowed in "advanced" API mode.
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name text
   */
  API.__private__.text = API.text = function(text, x, y, options, transform) {
    /*
     * Inserts something like this into PDF
     *   BT
     *    /F1 16 Tf  % Font name + size
     *    16 TL % How many units down for next line in multiline text
     *    0 g % color
     *    28.35 813.54 Td % position
     *    (line one) Tj
     *    T* (line two) Tj
     *    T* (line three) Tj
     *   ET
     */
    options = options || {};
    var scope = options.scope || this;
    var payload, da, angle, align, charSpace, maxWidth, flags, horizontalScale;

    // Pre-August-2012 the order of arguments was function(x, y, text, flags)
    // in effort to make all calls have similar signature like
    //   function(data, coordinates... , miscellaneous)
    // this method had its args flipped.
    // code below allows backward compatibility with old arg order.
    if (
      typeof text === "number" &&
      typeof x === "number" &&
      (typeof y === "string" || Array.isArray(y))
    ) {
      var tmp = y;
      y = x;
      x = text;
      text = tmp;
    }

    var transformationMatrix;

    if (arguments[3] instanceof Matrix === false) {
      flags = arguments[3];
      angle = arguments[4];
      align = arguments[5];

      if (typeof flags !== "object" || flags === null) {
        if (typeof angle === "string") {
          align = angle;
          angle = null;
        }
        if (typeof flags === "string") {
          align = flags;
          flags = null;
        }
        if (typeof flags === "number") {
          angle = flags;
          flags = null;
        }
        options = {
          flags: flags,
          angle: angle,
          align: align
        };
      }
    } else {
      advancedApiModeTrap(
        "The transform parameter of text() with a Matrix value"
      );
      transformationMatrix = transform;
    }

    if (isNaN(x) || isNaN(y) || typeof text === "undefined" || text === null) {
      throw new Error("Invalid arguments passed to jsPDF.text");
    }

    if (text.length === 0) {
      return scope;
    }

    var xtra = "";
    var isHex = false;
    var lineHeight =
      typeof options.lineHeightFactor === "number"
        ? options.lineHeightFactor
        : lineHeightFactor;
    var scaleFactor = scope.internal.scaleFactor;

    function ESC(s) {
      s = s.split("\t").join(Array(options.TabLen || 9).join(" "));
      return pdfEscape(s, flags);
    }

    function transformTextToSpecialArray(text) {
      //we don't want to destroy original text array, so cloning it
      var sa = text.concat();
      var da = [];
      var len = sa.length;
      var curDa;
      //we do array.join('text that must not be PDFescaped")
      //thus, pdfEscape each component separately
      while (len--) {
        curDa = sa.shift();
        if (typeof curDa === "string") {
          da.push(curDa);
        } else {
          if (
            Array.isArray(text) &&
            (curDa.length === 1 ||
              (curDa[1] === undefined && curDa[2] === undefined))
          ) {
            da.push(curDa[0]);
          } else {
            da.push([curDa[0], curDa[1], curDa[2]]);
          }
        }
      }
      return da;
    }

    function processTextByFunction(text, processingFunction) {
      var result;
      if (typeof text === "string") {
        result = processingFunction(text)[0];
      } else if (Array.isArray(text)) {
        //we don't want to destroy original text array, so cloning it
        var sa = text.concat();
        var da = [];
        var len = sa.length;
        var curDa;
        var tmpResult;
        //we do array.join('text that must not be PDFescaped")
        //thus, pdfEscape each component separately
        while (len--) {
          curDa = sa.shift();
          if (typeof curDa === "string") {
            da.push(processingFunction(curDa)[0]);
          } else if (Array.isArray(curDa) && typeof curDa[0] === "string") {
            tmpResult = processingFunction(curDa[0], curDa[1], curDa[2]);
            da.push([tmpResult[0], tmpResult[1], tmpResult[2]]);
          }
        }
        result = da;
      }
      return result;
    }

    //Check if text is of type String
    var textIsOfTypeString = false;
    var tmpTextIsOfTypeString = true;

    if (typeof text === "string") {
      textIsOfTypeString = true;
    } else if (Array.isArray(text)) {
      //we don't want to destroy original text array, so cloning it
      var sa = text.concat();
      da = [];
      var len = sa.length;
      var curDa;
      //we do array.join('text that must not be PDFescaped")
      //thus, pdfEscape each component separately
      while (len--) {
        curDa = sa.shift();
        if (
          typeof curDa !== "string" ||
          (Array.isArray(curDa) && typeof curDa[0] !== "string")
        ) {
          tmpTextIsOfTypeString = false;
        }
      }
      textIsOfTypeString = tmpTextIsOfTypeString;
    }
    if (textIsOfTypeString === false) {
      throw new Error(
        'Type of text must be string or Array. "' +
          text +
          '" is not recognized.'
      );
    }

    //If there are any newlines in text, we assume
    //the user wanted to print multiple lines, so break the
    //text up into an array. If the text is already an array,
    //we assume the user knows what they are doing.
    //Convert text into an array anyway to simplify
    //later code.

    if (typeof text === "string") {
      if (text.match(/[\r?\n]/)) {
        text = text.split(/\r\n|\r|\n/g);
      } else {
        text = [text];
      }
    }

    //baseline
    var height = activeFontSize / scope.internal.scaleFactor;
    var descent = height * (lineHeight - 1);

    switch (options.baseline) {
      case "bottom":
        y -= descent;
        break;
      case "top":
        y += height - descent;
        break;
      case "hanging":
        y += height - 2 * descent;
        break;
      case "middle":
        y += height / 2 - descent;
        break;
      case "ideographic":
      case "alphabetic":
      default:
        // do nothing, everything is fine
        break;
    }

    //multiline
    maxWidth = options.maxWidth || 0;

    if (maxWidth > 0) {
      if (typeof text === "string") {
        text = scope.splitTextToSize(text, maxWidth);
      } else if (Object.prototype.toString.call(text) === "[object Array]") {
        text = text.reduce(function(acc, textLine) {
          return acc.concat(scope.splitTextToSize(textLine, maxWidth));
        }, []);
      }
    }

    //creating Payload-Object to make text byRef
    payload = {
      text: text,
      x: x,
      y: y,
      options: options,
      mutex: {
        pdfEscape: pdfEscape,
        activeFontKey: activeFontKey,
        fonts: fonts,
        activeFontSize: activeFontSize
      }
    };
    events.publish("preProcessText", payload);

    text = payload.text;
    options = payload.options;

    //angle
    angle = options.angle;

    if (
      transformationMatrix instanceof Matrix === false &&
      angle &&
      typeof angle === "number"
    ) {
      angle *= Math.PI / 180;

      if (options.rotationDirection === 0) {
        angle = -angle;
      }

      if (apiMode === ApiMode.ADVANCED) {
        angle = -angle;
      }

      var c = Math.cos(angle);
      var s = Math.sin(angle);
      transformationMatrix = new Matrix(c, s, -s, c, 0, 0);
    } else if (angle && angle instanceof Matrix) {
      transformationMatrix = angle;
    }

    if (apiMode === ApiMode.ADVANCED && !transformationMatrix) {
      transformationMatrix = identityMatrix;
    }

    //charSpace

    charSpace = options.charSpace || activeCharSpace;

    if (typeof charSpace !== "undefined") {
      xtra += hpf(scale(charSpace)) + " Tc\n";
      this.setCharSpace(this.getCharSpace() || 0);
    }

    horizontalScale = options.horizontalScale;
    if (typeof horizontalScale !== "undefined") {
      xtra += hpf(horizontalScale * 100) + " Tz\n";
    }

    //lang

    var lang = options.lang;

    if (lang) {
      //    xtra += "/Lang (" + lang +")\n";
    }

    //renderingMode
    var renderingMode = -1;
    var parmRenderingMode =
      typeof options.renderingMode !== "undefined"
        ? options.renderingMode
        : options.stroke;
    var pageContext = scope.internal.getCurrentPageInfo().pageContext;

    switch (parmRenderingMode) {
      case 0:
      case false:
      case "fill":
        renderingMode = 0;
        break;
      case 1:
      case true:
      case "stroke":
        renderingMode = 1;
        break;
      case 2:
      case "fillThenStroke":
        renderingMode = 2;
        break;
      case 3:
      case "invisible":
        renderingMode = 3;
        break;
      case 4:
      case "fillAndAddForClipping":
        renderingMode = 4;
        break;
      case 5:
      case "strokeAndAddPathForClipping":
        renderingMode = 5;
        break;
      case 6:
      case "fillThenStrokeAndAddToPathForClipping":
        renderingMode = 6;
        break;
      case 7:
      case "addToPathForClipping":
        renderingMode = 7;
        break;
    }

    var usedRenderingMode =
      typeof pageContext.usedRenderingMode !== "undefined"
        ? pageContext.usedRenderingMode
        : -1;

    //if the coder wrote it explicitly to use a specific
    //renderingMode, then use it
    if (renderingMode !== -1) {
      xtra += renderingMode + " Tr\n";
      //otherwise check if we used the rendering Mode already
      //if so then set the rendering Mode...
    } else if (usedRenderingMode !== -1) {
      xtra += "0 Tr\n";
    }

    if (renderingMode !== -1) {
      pageContext.usedRenderingMode = renderingMode;
    }

    //align
    align = options.align || "left";
    var leading = activeFontSize * lineHeight;
    var pageWidth = scope.internal.pageSize.getWidth();
    var activeFont = fonts[activeFontKey];
    charSpace = options.charSpace || activeCharSpace;
    maxWidth = options.maxWidth || 0;

    var lineWidths;
    flags = Object.assign({ autoencode: true, noBOM: true }, options.flags);

    var wordSpacingPerLine = [];

    if (Object.prototype.toString.call(text) === "[object Array]") {
      da = transformTextToSpecialArray(text);
      var newY;
      if (align !== "left") {
        lineWidths = da.map(function(v) {
          return (
            (scope.getStringUnitWidth(v, {
              font: activeFont,
              charSpace: charSpace,
              fontSize: activeFontSize,
              doKerning: false
            }) *
              activeFontSize) /
            scaleFactor
          );
        });
      }
      //The first line uses the "main" Td setting,
      //and the subsequent lines are offset by the
      //previous line's x coordinate.
      var prevWidth = 0;
      var newX;
      if (align === "right") {
        //The passed in x coordinate defines the
        //rightmost point of the text.
        x -= lineWidths[0];
        text = [];
        len = da.length;
        for (var i = 0; i < len; i++) {
          if (i === 0) {
            newX = getHorizontalCoordinate(x);
            newY = getVerticalCoordinate(y);
          } else {
            newX = scale(prevWidth - lineWidths[i]);
            newY = -leading;
          }
          text.push([da[i], newX, newY]);
          prevWidth = lineWidths[i];
        }
      } else if (align === "center") {
        //The passed in x coordinate defines
        //the center point.
        x -= lineWidths[0] / 2;
        text = [];
        len = da.length;
        for (var j = 0; j < len; j++) {
          if (j === 0) {
            newX = getHorizontalCoordinate(x);
            newY = getVerticalCoordinate(y);
          } else {
            newX = scale((prevWidth - lineWidths[j]) / 2);
            newY = -leading;
          }
          text.push([da[j], newX, newY]);
          prevWidth = lineWidths[j];
        }
      } else if (align === "left") {
        text = [];
        len = da.length;
        for (var h = 0; h < len; h++) {
          text.push(da[h]);
        }
      } else if (align === "justify") {
        text = [];
        len = da.length;
        maxWidth = maxWidth !== 0 ? maxWidth : pageWidth;

        for (var l = 0; l < len; l++) {
          newY = l === 0 ? getVerticalCoordinate(y) : -leading;
          newX = l === 0 ? getHorizontalCoordinate(x) : 0;
          if (l < len - 1) {
            wordSpacingPerLine.push(
              hpf(
                scale(
                  (maxWidth - lineWidths[l]) / (da[l].split(" ").length - 1)
                )
              )
            );
          } else {
            wordSpacingPerLine.push(0);
          }
          text.push([da[l], newX, newY]);
        }
      } else {
        throw new Error(
          'Unrecognized alignment option, use "left", "center", "right" or "justify".'
        );
      }
    }

    //R2L
    var doReversing = typeof options.R2L === "boolean" ? options.R2L : R2L;
    if (doReversing === true) {
      text = processTextByFunction(text, function(text, posX, posY) {
        return [
          text
            .split("")
            .reverse()
            .join(""),
          posX,
          posY
        ];
      });
    }

    //creating Payload-Object to make text byRef
    payload = {
      text: text,
      x: x,
      y: y,
      options: options,
      mutex: {
        pdfEscape: pdfEscape,
        activeFontKey: activeFontKey,
        fonts: fonts,
        activeFontSize: activeFontSize
      }
    };
    events.publish("postProcessText", payload);

    text = payload.text;
    isHex = payload.mutex.isHex || false;

    //Escaping
    var activeFontEncoding = fonts[activeFontKey].encoding;

    if (
      activeFontEncoding === "WinAnsiEncoding" ||
      activeFontEncoding === "StandardEncoding"
    ) {
      text = processTextByFunction(text, function(text, posX, posY) {
        return [ESC(text), posX, posY];
      });
    }

    da = transformTextToSpecialArray(text);

    text = [];
    var STRING = 0;
    var ARRAY = 1;
    var variant = Array.isArray(da[0]) ? ARRAY : STRING;
    var posX;
    var posY;
    var content;
    var wordSpacing = "";

    var generatePosition = function(
      parmPosX,
      parmPosY,
      parmTransformationMatrix
    ) {
      var position = "";
      if (parmTransformationMatrix instanceof Matrix) {
        // It is kind of more intuitive to apply a plain rotation around the text anchor set by x and y
        // but when the user supplies an arbitrary transformation matrix, the x and y offsets should be applied
        // in the coordinate system established by this matrix
        if (typeof options.angle === "number") {
          parmTransformationMatrix = matrixMult(
            parmTransformationMatrix,
            new Matrix(1, 0, 0, 1, parmPosX, parmPosY)
          );
        } else {
          parmTransformationMatrix = matrixMult(
            new Matrix(1, 0, 0, 1, parmPosX, parmPosY),
            parmTransformationMatrix
          );
        }

        if (apiMode === ApiMode.ADVANCED) {
          parmTransformationMatrix = matrixMult(
            new Matrix(1, 0, 0, -1, 0, 0),
            parmTransformationMatrix
          );
        }

        position = parmTransformationMatrix.join(" ") + " Tm\n";
      } else {
        position = hpf(parmPosX) + " " + hpf(parmPosY) + " Td\n";
      }
      return position;
    };

    for (var lineIndex = 0; lineIndex < da.length; lineIndex++) {
      wordSpacing = "";

      switch (variant) {
        case ARRAY:
          content =
            (isHex ? "<" : "(") + da[lineIndex][0] + (isHex ? ">" : ")");
          posX = parseFloat(da[lineIndex][1]);
          posY = parseFloat(da[lineIndex][2]);
          break;
        case STRING:
          content = (isHex ? "<" : "(") + da[lineIndex] + (isHex ? ">" : ")");
          posX = getHorizontalCoordinate(x);
          posY = getVerticalCoordinate(y);
          break;
      }

      if (
        typeof wordSpacingPerLine !== "undefined" &&
        typeof wordSpacingPerLine[lineIndex] !== "undefined"
      ) {
        wordSpacing = wordSpacingPerLine[lineIndex] + " Tw\n";
      }

      if (lineIndex === 0) {
        text.push(
          wordSpacing +
            generatePosition(posX, posY, transformationMatrix) +
            content
        );
      } else if (variant === STRING) {
        text.push(wordSpacing + content);
      } else if (variant === ARRAY) {
        text.push(
          wordSpacing +
            generatePosition(posX, posY, transformationMatrix) +
            content
        );
      }
    }

    text = variant === STRING ? text.join(" Tj\nT* ") : text.join(" Tj\n");
    text += " Tj\n";

    var result = "BT\n/";
    result += activeFontKey + " " + activeFontSize + " Tf\n"; // font face, style, size
    result += hpf(activeFontSize * lineHeight) + " TL\n"; // line spacing
    result += textColor + "\n";
    result += xtra;
    result += text;
    result += "ET";

    out(result);
    usedFonts[activeFontKey] = true;
    return scope;
  };

  // PDF supports these path painting and clip path operators:
  //
  // S - stroke
  // s - close/stroke
  // f (F) - fill non-zero
  // f* - fill evenodd
  // B - fill stroke nonzero
  // B* - fill stroke evenodd
  // b - close fill stroke nonzero
  // b* - close fill stroke evenodd
  // n - nothing (consume path)
  // W - clip nonzero
  // W* - clip evenodd
  //
  // In order to keep the API small, we omit the close-and-fill/stroke operators and provide a separate close()
  // method.
  /**
   *
   * @name clip
   * @function
   * @instance
   * @param {string} rule Only possible value is 'evenodd'
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @description All .clip() after calling drawing ops with a style argument of null.
   */
  var clip = (API.__private__.clip = API.clip = function(rule) {
    // Call .clip() after calling drawing ops with a style argument of null
    // W is the PDF clipping op
    if ("evenodd" === rule) {
      out("W*");
    } else {
      out("W");
    }
    return this;
  });

  /**
   * @name clipEvenOdd
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @description Modify the current clip path by intersecting it with the current path using the even-odd rule. Note
   * that this will NOT consume the current path. In order to only use this path for clipping call
   * {@link API.discardPath} afterwards.
   */
  API.clipEvenOdd = function() {
    return clip("evenodd");
  };

  /**
   * Consumes the current path without any effect. Mainly used in combination with {@link clip} or
   * {@link clipEvenOdd}. The PDF "n" operator.
   * @name discardPath
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   */
  API.__private__.discardPath = API.discardPath = function() {
    out("n");
    return this;
  };

  var isValidStyle = (API.__private__.isValidStyle = function(style) {
    var validStyleVariants = [
      undefined,
      null,
      "S",
      "D",
      "F",
      "DF",
      "FD",
      "f",
      "f*",
      "B",
      "B*",
      "n"
    ];
    var result = false;
    if (validStyleVariants.indexOf(style) !== -1) {
      result = true;
    }
    return result;
  });

  API.__private__.setDefaultPathOperation = API.setDefaultPathOperation = function(
    operator
  ) {
    if (isValidStyle(operator)) {
      defaultPathOperation = operator;
    }
    return this;
  };

  var getStyle = (API.__private__.getStyle = API.getStyle = function(style) {
    // see path-painting operators in PDF spec
    var op = defaultPathOperation; // stroke

    switch (style) {
      case "D":
      case "S":
        op = "S"; // stroke
        break;
      case "F":
        op = "f"; // fill
        break;
      case "FD":
      case "DF":
        op = "B";
        break;
      case "f":
      case "f*":
      case "B":
      case "B*":
        /*
               Allow direct use of these PDF path-painting operators:
               - f    fill using nonzero winding number rule
               - f*    fill using even-odd rule
               - B    fill then stroke with fill using non-zero winding number rule
               - B*    fill then stroke with fill using even-odd rule
               */
        op = style;
        break;
    }
    return op;
  });

  /**
   * Close the current path. The PDF "h" operator.
   * @name close
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   */
  var close = (API.close = function() {
    out("h");
    return this;
  });

  /**
   * Stroke the path. The PDF "S" operator.
   * @name stroke
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   */
  API.stroke = function() {
    out("S");
    return this;
  };

  /**
   * Fill the current path using the nonzero winding number rule. If a pattern is provided, the path will be filled
   * with this pattern, otherwise with the current fill color. Equivalent to the PDF "f" operator.
   * @name fill
   * @function
   * @instance
   * @param {PatternData=} pattern If provided the path will be filled with this pattern
   * @returns {jsPDF}
   * @memberof jsPDF#
   */
  API.fill = function(pattern) {
    fillWithOptionalPattern("f", pattern);
    return this;
  };

  /**
   * Fill the current path using the even-odd rule. The PDF f* operator.
   * @see API.fill
   * @name fillEvenOdd
   * @function
   * @instance
   * @param {PatternData=} pattern If provided the path will be filled with this pattern
   * @returns {jsPDF}
   * @memberof jsPDF#
   */
  API.fillEvenOdd = function(pattern) {
    fillWithOptionalPattern("f*", pattern);
    return this;
  };

  /**
   * Fill using the nonzero winding number rule and then stroke the current Path. The PDF "B" operator.
   * @see API.fill
   * @name fillStroke
   * @function
   * @instance
   * @param {PatternData=} pattern If provided the path will be stroked with this pattern
   * @returns {jsPDF}
   * @memberof jsPDF#
   */
  API.fillStroke = function(pattern) {
    fillWithOptionalPattern("B", pattern);
    return this;
  };

  /**
   * Fill using the even-odd rule and then stroke the current Path. The PDF "B" operator.
   * @see API.fill
   * @name fillStrokeEvenOdd
   * @function
   * @instance
   * @param {PatternData=} pattern If provided the path will be fill-stroked with this pattern
   * @returns {jsPDF}
   * @memberof jsPDF#
   */
  API.fillStrokeEvenOdd = function(pattern) {
    fillWithOptionalPattern("B*", pattern);
    return this;
  };

  var fillWithOptionalPattern = function(style, pattern) {
    if (typeof pattern === "object") {
      fillWithPattern(pattern, style);
    } else {
      out(style);
    }
  };

  var putStyle = function(style) {
    if (
      style === null ||
      (apiMode === ApiMode.ADVANCED && style === undefined)
    ) {
      return;
    }

    style = getStyle(style);

    // stroking / filling / both the path
    out(style);
  };

  function cloneTilingPattern(patternKey, boundingBox, xStep, yStep, matrix) {
    var clone = new TilingPattern(
      boundingBox || this.boundingBox,
      xStep || this.xStep,
      yStep || this.yStep,
      this.gState,
      matrix || this.matrix
    );
    clone.stream = this.stream;
    var key = patternKey + "$$" + this.cloneIndex++ + "$$";
    addPattern(key, clone);
    return clone;
  }

  var fillWithPattern = function(patternData, style) {
    var patternId = patternMap[patternData.key];
    var pattern = patterns[patternId];

    if (pattern instanceof ShadingPattern) {
      out("q");

      out(clipRuleFromStyle(style));

      if (pattern.gState) {
        API.setGState(pattern.gState);
      }
      out(patternData.matrix.toString() + " cm");
      out("/" + patternId + " sh");
      out("Q");
    } else if (pattern instanceof TilingPattern) {
      // pdf draws patterns starting at the bottom left corner and they are not affected by the global transformation,
      // so we must flip them
      var matrix = new Matrix(1, 0, 0, -1, 0, getPageHeight());

      if (patternData.matrix) {
        matrix = matrix.multiply(patternData.matrix || identityMatrix);
        // we cannot apply a matrix to the pattern on use so we must abuse the pattern matrix and create new instances
        // for each use
        patternId = cloneTilingPattern.call(
          pattern,
          patternData.key,
          patternData.boundingBox,
          patternData.xStep,
          patternData.yStep,
          matrix
        ).id;
      }

      out("q");
      out("/Pattern cs");
      out("/" + patternId + " scn");

      if (pattern.gState) {
        API.setGState(pattern.gState);
      }

      out(style);
      out("Q");
    }
  };

  var clipRuleFromStyle = function(style) {
    switch (style) {
      case "f":
      case "F":
        return "W n";
      case "f*":
        return "W* n";
      case "B":
        return "W S";
      case "B*":
        return "W* S";

      // these two are for compatibility reasons (in the past, calling any primitive method with a shading pattern
      // and "n"/"S" as style would still fill/fill and stroke the path)
      case "S":
        return "W S";
      case "n":
        return "W n";
    }
  };

  /**
   * Begin a new subpath by moving the current point to coordinates (x, y). The PDF "m" operator.
   * @param {number} x
   * @param {number} y
   * @name moveTo
   * @function
   * @instance
   * @memberof jsPDF#
   * @returns {jsPDF}
   */
  var moveTo = (API.moveTo = function(x, y) {
    out(hpf(scale(x)) + " " + hpf(transformScaleY(y)) + " m");
    return this;
  });

  /**
   * Append a straight line segment from the current point to the point (x, y). The PDF "l" operator.
   * @param {number} x
   * @param {number} y
   * @memberof jsPDF#
   * @name lineTo
   * @function
   * @instance
   * @memberof jsPDF#
   * @returns {jsPDF}
   */
  var lineTo = (API.lineTo = function(x, y) {
    out(hpf(scale(x)) + " " + hpf(transformScaleY(y)) + " l");
    return this;
  });

  /**
   * Append a cubic Bézier curve to the current path. The curve shall extend from the current point to the point
   * (x3, y3), using (x1, y1) and (x2, y2) as Bézier control points. The new current point shall be (x3, x3).
   * @param {number} x1
   * @param {number} y1
   * @param {number} x2
   * @param {number} y2
   * @param {number} x3
   * @param {number} y3
   * @memberof jsPDF#
   * @name curveTo
   * @function
   * @instance
   * @memberof jsPDF#
   * @returns {jsPDF}
   */
  var curveTo = (API.curveTo = function(x1, y1, x2, y2, x3, y3) {
    out(
      [
        hpf(scale(x1)),
        hpf(transformScaleY(y1)),
        hpf(scale(x2)),
        hpf(transformScaleY(y2)),
        hpf(scale(x3)),
        hpf(transformScaleY(y3)),
        "c"
      ].join(" ")
    );
    return this;
  });

  /**
   * Draw a line on the current page.
   *
   * @name line
   * @function
   * @instance
   * @param {number} x1
   * @param {number} y1
   * @param {number} x2
   * @param {number} y2
   * @param {string} style A string specifying the painting style or null.  Valid styles include: 'S' [default] - stroke, 'F' - fill,  and 'DF' (or 'FD') -  fill then stroke. A null value postpones setting the style so that a shape may be composed using multiple method calls. The last drawing method call used to define the shape should not have a null style argument. default: 'S'
   * @returns {jsPDF}
   * @memberof jsPDF#
   */
  API.__private__.line = API.line = function(x1, y1, x2, y2, style) {
    if (
      isNaN(x1) ||
      isNaN(y1) ||
      isNaN(x2) ||
      isNaN(y2) ||
      !isValidStyle(style)
    ) {
      throw new Error("Invalid arguments passed to jsPDF.line");
    }
    if (apiMode === ApiMode.COMPAT) {
      return this.lines([[x2 - x1, y2 - y1]], x1, y1, [1, 1], style || "S");
    } else {
      return this.lines([[x2 - x1, y2 - y1]], x1, y1, [1, 1]).stroke();
    }
  };

  /**
   * @typedef {Object} PatternData
   * {Matrix|undefined} matrix
   * {Number|undefined} xStep
   * {Number|undefined} yStep
   * {Array.<Number>|undefined} boundingBox
   */

  /**
   * Adds series of curves (straight lines or cubic bezier curves) to canvas, starting at `x`, `y` coordinates.
   * All data points in `lines` are relative to last line origin.
   * `x`, `y` become x1,y1 for first line / curve in the set.
   * For lines you only need to specify [x2, y2] - (ending point) vector against x1, y1 starting point.
   * For bezier curves you need to specify [x2,y2,x3,y3,x4,y4] - vectors to control points 1, 2, ending point. All vectors are against the start of the curve - x1,y1.
   *
   * @example .lines([[2,2],[-2,2],[1,1,2,2,3,3],[2,1]], 212,110, [1,1], 'F', false) // line, line, bezier curve, line
   * @param {Array} lines Array of *vector* shifts as pairs (lines) or sextets (cubic bezier curves).
   * @param {number} x Coordinate (in units declared at inception of PDF document) against left edge of the page
   * @param {number} y Coordinate (in units declared at inception of PDF document) against upper edge of the page
   * @param {number} scale (Defaults to [1.0,1.0]) x,y Scaling factor for all vectors. Elements can be any floating number Sub-one makes drawing smaller. Over-one grows the drawing. Negative flips the direction.
   * @param {string=} style A string specifying the painting style or null. Valid styles include:
   * 'S' [default] - stroke,
   * 'F' - fill,
   * and 'DF' (or 'FD') -  fill then stroke.
   * In "compat" API mode, a null value postpones setting the style so that a shape may be composed using multiple
   * method calls. The last drawing method call used to define the shape should not have a null style argument.
   *
   * In "advanced" API mode this parameter is deprecated.
   * @param {Boolean=} closed If true, the path is closed with a straight line from the end of the last curve to the starting point.
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name lines
   */
  API.__private__.lines = API.lines = function(
    lines,
    x,
    y,
    scale,
    style,
    closed
  ) {
    var scalex, scaley, i, l, leg, x2, y2, x3, y3, x4, y4, tmp;

    // Pre-August-2012 the order of arguments was function(x, y, lines, scale, style)
    // in effort to make all calls have similar signature like
    //   function(content, coordinateX, coordinateY , miscellaneous)
    // this method had its args flipped.
    // code below allows backward compatibility with old arg order.
    if (typeof lines === "number") {
      tmp = y;
      y = x;
      x = lines;
      lines = tmp;
    }

    scale = scale || [1, 1];
    closed = closed || false;

    if (
      isNaN(x) ||
      isNaN(y) ||
      !Array.isArray(lines) ||
      !Array.isArray(scale) ||
      !isValidStyle(style) ||
      typeof closed !== "boolean"
    ) {
      throw new Error("Invalid arguments passed to jsPDF.lines");
    }

    // starting point
    moveTo(x, y);

    scalex = scale[0];
    scaley = scale[1];
    l = lines.length;
    //, x2, y2 // bezier only. In page default measurement "units", *after* scaling
    //, x3, y3 // bezier only. In page default measurement "units", *after* scaling
    // ending point for all, lines and bezier. . In page default measurement "units", *after* scaling
    x4 = x; // last / ending point = starting point for first item.
    y4 = y; // last / ending point = starting point for first item.

    for (i = 0; i < l; i++) {
      leg = lines[i];
      if (leg.length === 2) {
        // simple line
        x4 = leg[0] * scalex + x4; // here last x4 was prior ending point
        y4 = leg[1] * scaley + y4; // here last y4 was prior ending point
        lineTo(x4, y4);
      } else {
        // bezier curve
        x2 = leg[0] * scalex + x4; // here last x4 is prior ending point
        y2 = leg[1] * scaley + y4; // here last y4 is prior ending point
        x3 = leg[2] * scalex + x4; // here last x4 is prior ending point
        y3 = leg[3] * scaley + y4; // here last y4 is prior ending point
        x4 = leg[4] * scalex + x4; // here last x4 was prior ending point
        y4 = leg[5] * scaley + y4; // here last y4 was prior ending point
        curveTo(x2, y2, x3, y3, x4, y4);
      }
    }

    if (closed) {
      close();
    }

    putStyle(style);
    return this;
  };

  /**
   * Similar to {@link API.lines} but all coordinates are interpreted as absolute coordinates instead of relative.
   * @param {Array<Object>} lines An array of {op: operator, c: coordinates} object, where op is one of "m" (move to), "l" (line to)
   * "c" (cubic bezier curve) and "h" (close (sub)path)). c is an array of coordinates. "m" and "l" expect two, "c"
   * six and "h" an empty array (or undefined).
   * @function
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name path
   */
  API.path = function(lines) {
    for (var i = 0; i < lines.length; i++) {
      var leg = lines[i];
      var coords = leg.c;
      switch (leg.op) {
        case "m":
          moveTo(coords[0], coords[1]);
          break;
        case "l":
          lineTo(coords[0], coords[1]);
          break;
        case "c":
          curveTo.apply(this, coords);
          break;
        case "h":
          close();
          break;
      }
    }

    return this;
  };

  /**
   * Adds a rectangle to PDF.
   *
   * @param {number} x Coordinate (in units declared at inception of PDF document) against left edge of the page
   * @param {number} y Coordinate (in units declared at inception of PDF document) against upper edge of the page
   * @param {number} w Width (in units declared at inception of PDF document)
   * @param {number} h Height (in units declared at inception of PDF document)
   * @param {string=} style A string specifying the painting style or null. Valid styles include:
   * 'S' [default] - stroke,
   * 'F' - fill,
   * and 'DF' (or 'FD') -  fill then stroke.
   * In "compat" API mode, a null value postpones setting the style so that a shape may be composed using multiple
   * method calls. The last drawing method call used to define the shape should not have a null style argument.
   *
   * In "advanced" API mode this parameter is deprecated.
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name rect
   */
  API.__private__.rect = API.rect = function(x, y, w, h, style) {
    if (isNaN(x) || isNaN(y) || isNaN(w) || isNaN(h) || !isValidStyle(style)) {
      throw new Error("Invalid arguments passed to jsPDF.rect");
    }
    if (apiMode === ApiMode.COMPAT) {
      h = -h;
    }

    out(
      [
        hpf(scale(x)),
        hpf(transformScaleY(y)),
        hpf(scale(w)),
        hpf(scale(h)),
        "re"
      ].join(" ")
    );

    putStyle(style);
    return this;
  };

  /**
   * Adds a triangle to PDF.
   *
   * @param {number} x1 Coordinate (in units declared at inception of PDF document) against left edge of the page
   * @param {number} y1 Coordinate (in units declared at inception of PDF document) against upper edge of the page
   * @param {number} x2 Coordinate (in units declared at inception of PDF document) against left edge of the page
   * @param {number} y2 Coordinate (in units declared at inception of PDF document) against upper edge of the page
   * @param {number} x3 Coordinate (in units declared at inception of PDF document) against left edge of the page
   * @param {number} y3 Coordinate (in units declared at inception of PDF document) against upper edge of the page
   * @param {string=} style A string specifying the painting style or null. Valid styles include:
   * 'S' [default] - stroke,
   * 'F' - fill,
   * and 'DF' (or 'FD') -  fill then stroke.
   * In "compat" API mode, a null value postpones setting the style so that a shape may be composed using multiple
   * method calls. The last drawing method call used to define the shape should not have a null style argument.
   *
   * In "advanced" API mode this parameter is deprecated.
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name triangle
   */
  API.__private__.triangle = API.triangle = function(
    x1,
    y1,
    x2,
    y2,
    x3,
    y3,
    style
  ) {
    if (
      isNaN(x1) ||
      isNaN(y1) ||
      isNaN(x2) ||
      isNaN(y2) ||
      isNaN(x3) ||
      isNaN(y3) ||
      !isValidStyle(style)
    ) {
      throw new Error("Invalid arguments passed to jsPDF.triangle");
    }
    this.lines(
      [
        [x2 - x1, y2 - y1], // vector to point 2
        [x3 - x2, y3 - y2], // vector to point 3
        [x1 - x3, y1 - y3] // closing vector back to point 1
      ],
      x1,
      y1, // start of path
      [1, 1],
      style,
      true
    );
    return this;
  };

  /**
   * Adds a rectangle with rounded corners to PDF.
   *
   * @param {number} x Coordinate (in units declared at inception of PDF document) against left edge of the page
   * @param {number} y Coordinate (in units declared at inception of PDF document) against upper edge of the page
   * @param {number} w Width (in units declared at inception of PDF document)
   * @param {number} h Height (in units declared at inception of PDF document)
   * @param {number} rx Radius along x axis (in units declared at inception of PDF document)
   * @param {number} ry Radius along y axis (in units declared at inception of PDF document)
   * @param {string=} style A string specifying the painting style or null. Valid styles include:
   * 'S' [default] - stroke,
   * 'F' - fill,
   * and 'DF' (or 'FD') -  fill then stroke.
   * In "compat" API mode, a null value postpones setting the style so that a shape may be composed using multiple
   * method calls. The last drawing method call used to define the shape should not have a null style argument.
   *
   * In "advanced" API mode this parameter is deprecated.
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name roundedRect
   */
  API.__private__.roundedRect = API.roundedRect = function(
    x,
    y,
    w,
    h,
    rx,
    ry,
    style
  ) {
    if (
      isNaN(x) ||
      isNaN(y) ||
      isNaN(w) ||
      isNaN(h) ||
      isNaN(rx) ||
      isNaN(ry) ||
      !isValidStyle(style)
    ) {
      throw new Error("Invalid arguments passed to jsPDF.roundedRect");
    }
    var MyArc = (4 / 3) * (Math.SQRT2 - 1);

    rx = Math.min(rx, w * 0.5);
    ry = Math.min(ry, h * 0.5);

    this.lines(
      [
        [w - 2 * rx, 0],
        [rx * MyArc, 0, rx, ry - ry * MyArc, rx, ry],
        [0, h - 2 * ry],
        [0, ry * MyArc, -(rx * MyArc), ry, -rx, ry],
        [-w + 2 * rx, 0],
        [-(rx * MyArc), 0, -rx, -(ry * MyArc), -rx, -ry],
        [0, -h + 2 * ry],
        [0, -(ry * MyArc), rx * MyArc, -ry, rx, -ry]
      ],
      x + rx,
      y, // start of path
      [1, 1],
      style,
      true
    );
    return this;
  };

  /**
   * Adds an ellipse to PDF.
   *
   * @param {number} x Coordinate (in units declared at inception of PDF document) against left edge of the page
   * @param {number} y Coordinate (in units declared at inception of PDF document) against upper edge of the page
   * @param {number} rx Radius along x axis (in units declared at inception of PDF document)
   * @param {number} ry Radius along y axis (in units declared at inception of PDF document)
   * @param {string=} style A string specifying the painting style or null. Valid styles include:
   * 'S' [default] - stroke,
   * 'F' - fill,
   * and 'DF' (or 'FD') -  fill then stroke.
   * In "compat" API mode, a null value postpones setting the style so that a shape may be composed using multiple
   * method calls. The last drawing method call used to define the shape should not have a null style argument.
   *
   * In "advanced" API mode this parameter is deprecated.
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name ellipse
   */
  API.__private__.ellipse = API.ellipse = function(x, y, rx, ry, style) {
    if (
      isNaN(x) ||
      isNaN(y) ||
      isNaN(rx) ||
      isNaN(ry) ||
      !isValidStyle(style)
    ) {
      throw new Error("Invalid arguments passed to jsPDF.ellipse");
    }
    var lx = (4 / 3) * (Math.SQRT2 - 1) * rx,
      ly = (4 / 3) * (Math.SQRT2 - 1) * ry;

    moveTo(x + rx, y);
    curveTo(x + rx, y - ly, x + lx, y - ry, x, y - ry);
    curveTo(x - lx, y - ry, x - rx, y - ly, x - rx, y);
    curveTo(x - rx, y + ly, x - lx, y + ry, x, y + ry);
    curveTo(x + lx, y + ry, x + rx, y + ly, x + rx, y);

    putStyle(style);
    return this;
  };

  /**
   * Adds an circle to PDF.
   *
   * @param {number} x Coordinate (in units declared at inception of PDF document) against left edge of the page
   * @param {number} y Coordinate (in units declared at inception of PDF document) against upper edge of the page
   * @param {number} r Radius (in units declared at inception of PDF document)
   * @param {string=} style A string specifying the painting style or null. Valid styles include:
   * 'S' [default] - stroke,
   * 'F' - fill,
   * and 'DF' (or 'FD') -  fill then stroke.
   * In "compat" API mode, a null value postpones setting the style so that a shape may be composed using multiple
   * method calls. The last drawing method call used to define the shape should not have a null style argument.
   *
   * In "advanced" API mode this parameter is deprecated.
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name circle
   */
  API.__private__.circle = API.circle = function(x, y, r, style) {
    if (isNaN(x) || isNaN(y) || isNaN(r) || !isValidStyle(style)) {
      throw new Error("Invalid arguments passed to jsPDF.circle");
    }
    return this.ellipse(x, y, r, r, style);
  };

  /**
   * Sets text font face, variant for upcoming text elements.
   * See output of jsPDF.getFontList() for possible font names, styles.
   *
   * @param {string} fontName Font name or family. Example: "times".
   * @param {string} fontStyle Font style or variant. Example: "italic".
   * @param {number | string} fontWeight Weight of the Font. Example: "normal" | 400
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name setFont
   */
  API.setFont = function(fontName, fontStyle, fontWeight) {
    if (fontWeight) {
      fontStyle = combineFontStyleAndFontWeight(fontStyle, fontWeight);
    }
    activeFontKey = getFont(fontName, fontStyle, {
      disableWarning: false
    });
    return this;
  };

  /**
   * Gets text font face, variant for upcoming text elements.
   *
   * @function
   * @instance
   * @returns {Object}
   * @memberof jsPDF#
   * @name getFont
   */
  var getFontEntry = (API.__private__.getFont = API.getFont = function() {
    return fonts[getFont.apply(API, arguments)];
  });

  /**
   * Returns an object - a tree of fontName to fontStyle relationships available to
   * active PDF document.
   *
   * @public
   * @function
   * @instance
   * @returns {Object} Like {'times':['normal', 'italic', ... ], 'arial':['normal', 'bold', ... ], ... }
   * @memberof jsPDF#
   * @name getFontList
   */
  API.__private__.getFontList = API.getFontList = function() {
    var list = {},
      fontName,
      fontStyle;

    for (fontName in fontmap) {
      if (fontmap.hasOwnProperty(fontName)) {
        list[fontName] = [];
        for (fontStyle in fontmap[fontName]) {
          if (fontmap[fontName].hasOwnProperty(fontStyle)) {
            list[fontName].push(fontStyle);
          }
        }
      }
    }
    return list;
  };

  /**
   * Add a custom font to the current instance.
   *
   * @param {string} postScriptName PDF specification full name for the font.
   * @param {string} id PDF-document-instance-specific label assinged to the font.
   * @param {string} fontStyle Style of the Font.
   * @param {number | string} fontWeight Weight of the Font.
   * @param {Object} encoding Encoding_name-to-Font_metrics_object mapping.
   * @function
   * @instance
   * @memberof jsPDF#
   * @name addFont
   * @returns {string} fontId
   */
  API.addFont = function(
    postScriptName,
    fontName,
    fontStyle,
    fontWeight,
    encoding
  ) {
    var encodingOptions = [
      "StandardEncoding",
      "MacRomanEncoding",
      "Identity-H",
      "WinAnsiEncoding"
    ];
    if (arguments[3] && encodingOptions.indexOf(arguments[3]) !== -1) {
      //IE 11 fix
      encoding = arguments[3];
    } else if (arguments[3] && encodingOptions.indexOf(arguments[3]) == -1) {
      fontStyle = combineFontStyleAndFontWeight(fontStyle, fontWeight);
    }
    encoding = encoding || "Identity-H";
    return addFont.call(this, postScriptName, fontName, fontStyle, encoding);
  };

  var lineWidth = options.lineWidth || 0.200025; // 2mm
  /**
   * Gets the line width, default: 0.200025.
   *
   * @function
   * @instance
   * @returns {number} lineWidth
   * @memberof jsPDF#
   * @name getLineWidth
   */
  var getLineWidth = (API.__private__.getLineWidth = API.getLineWidth = function() {
    return lineWidth;
  });

  /**
   * Sets line width for upcoming lines.
   *
   * @param {number} width Line width (in units declared at inception of PDF document).
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name setLineWidth
   */
  var setLineWidth = (API.__private__.setLineWidth = API.setLineWidth = function(
    width
  ) {
    lineWidth = width;
    out(hpf(scale(width)) + " w");
    return this;
  });

  /**
   * Sets the dash pattern for upcoming lines.
   *
   * To reset the settings simply call the method without any parameters.
   * @param {Array<number>} dashArray An array containing 0-2 numbers. The first number sets the length of the
   * dashes, the second number the length of the gaps. If the second number is missing, the gaps are considered
   * to be as long as the dashes. An empty array means solid, unbroken lines.
   * @param {number} dashPhase The phase lines start with.
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name setLineDashPattern
   */
  API.__private__.setLineDash = jsPDF.API.setLineDash = jsPDF.API.setLineDashPattern = function(
    dashArray,
    dashPhase
  ) {
    dashArray = dashArray || [];
    dashPhase = dashPhase || 0;

    if (isNaN(dashPhase) || !Array.isArray(dashArray)) {
      throw new Error("Invalid arguments passed to jsPDF.setLineDash");
    }

    dashArray = dashArray
      .map(function(x) {
        return hpf(scale(x));
      })
      .join(" ");
    dashPhase = hpf(scale(dashPhase));

    out("[" + dashArray + "] " + dashPhase + " d");
    return this;
  };

  var lineHeightFactor;

  var getLineHeight = (API.__private__.getLineHeight = API.getLineHeight = function() {
    return activeFontSize * lineHeightFactor;
  });

  API.__private__.getLineHeight = API.getLineHeight = function() {
    return activeFontSize * lineHeightFactor;
  };

  /**
   * Sets the LineHeightFactor of proportion.
   *
   * @param {number} value LineHeightFactor value. Default: 1.15.
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name setLineHeightFactor
   */
  var setLineHeightFactor = (API.__private__.setLineHeightFactor = API.setLineHeightFactor = function(
    value
  ) {
    value = value || 1.15;
    if (typeof value === "number") {
      lineHeightFactor = value;
    }
    return this;
  });

  /**
   * Gets the LineHeightFactor, default: 1.15.
   *
   * @function
   * @instance
   * @returns {number} lineHeightFactor
   * @memberof jsPDF#
   * @name getLineHeightFactor
   */
  var getLineHeightFactor = (API.__private__.getLineHeightFactor = API.getLineHeightFactor = function() {
    return lineHeightFactor;
  });

  setLineHeightFactor(options.lineHeight);

  var getHorizontalCoordinate = (API.__private__.getHorizontalCoordinate = function(
    value
  ) {
    return scale(value);
  });

  var getVerticalCoordinate = (API.__private__.getVerticalCoordinate = function(
    value
  ) {
    if (apiMode === ApiMode.ADVANCED) {
      return value;
    } else {
      var pageHeight =
        pagesContext[currentPage].mediaBox.topRightY -
        pagesContext[currentPage].mediaBox.bottomLeftY;
      return pageHeight - scale(value);
    }
  });

  var getHorizontalCoordinateString = (API.__private__.getHorizontalCoordinateString = API.getHorizontalCoordinateString = function(
    value
  ) {
    return hpf(getHorizontalCoordinate(value));
  });

  var getVerticalCoordinateString = (API.__private__.getVerticalCoordinateString = API.getVerticalCoordinateString = function(
    value
  ) {
    return hpf(getVerticalCoordinate(value));
  });

  var strokeColor = options.strokeColor || "0 G";

  /**
   *  Gets the stroke color for upcoming elements.
   *
   * @function
   * @instance
   * @returns {string} colorAsHex
   * @memberof jsPDF#
   * @name getDrawColor
   */
  API.__private__.getStrokeColor = API.getDrawColor = function() {
    return decodeColorString(strokeColor);
  };

  /**
   * Sets the stroke color for upcoming elements.
   *
   * Depending on the number of arguments given, Gray, RGB, or CMYK
   * color space is implied.
   *
   * When only ch1 is given, "Gray" color space is implied and it
   * must be a value in the range from 0.00 (solid black) to to 1.00 (white)
   * if values are communicated as String types, or in range from 0 (black)
   * to 255 (white) if communicated as Number type.
   * The RGB-like 0-255 range is provided for backward compatibility.
   *
   * When only ch1,ch2,ch3 are given, "RGB" color space is implied and each
   * value must be in the range from 0.00 (minimum intensity) to to 1.00
   * (max intensity) if values are communicated as String types, or
   * from 0 (min intensity) to to 255 (max intensity) if values are communicated
   * as Number types.
   * The RGB-like 0-255 range is provided for backward compatibility.
   *
   * When ch1,ch2,ch3,ch4 are given, "CMYK" color space is implied and each
   * value must be a in the range from 0.00 (0% concentration) to to
   * 1.00 (100% concentration)
   *
   * Because JavaScript treats fixed point numbers badly (rounds to
   * floating point nearest to binary representation) it is highly advised to
   * communicate the fractional numbers as String types, not JavaScript Number type.
   *
   * @param {Number|String} ch1 Color channel value or {string} ch1 color value in hexadecimal, example: '#FFFFFF'.
   * @param {Number} ch2 Color channel value.
   * @param {Number} ch3 Color channel value.
   * @param {Number} ch4 Color channel value.
   *
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name setDrawColor
   */
  API.__private__.setStrokeColor = API.setDrawColor = function(
    ch1,
    ch2,
    ch3,
    ch4
  ) {
    var options = {
      ch1: ch1,
      ch2: ch2,
      ch3: ch3,
      ch4: ch4,
      pdfColorType: "draw",
      precision: 2
    };

    strokeColor = encodeColorString(options);
    out(strokeColor);
    return this;
  };

  var fillColor = options.fillColor || "0 g";

  /**
   * Gets the fill color for upcoming elements.
   *
   * @function
   * @instance
   * @returns {string} colorAsHex
   * @memberof jsPDF#
   * @name getFillColor
   */
  API.__private__.getFillColor = API.getFillColor = function() {
    return decodeColorString(fillColor);
  };

  /**
   * Sets the fill color for upcoming elements.
   *
   * Depending on the number of arguments given, Gray, RGB, or CMYK
   * color space is implied.
   *
   * When only ch1 is given, "Gray" color space is implied and it
   * must be a value in the range from 0.00 (solid black) to to 1.00 (white)
   * if values are communicated as String types, or in range from 0 (black)
   * to 255 (white) if communicated as Number type.
   * The RGB-like 0-255 range is provided for backward compatibility.
   *
   * When only ch1,ch2,ch3 are given, "RGB" color space is implied and each
   * value must be in the range from 0.00 (minimum intensity) to to 1.00
   * (max intensity) if values are communicated as String types, or
   * from 0 (min intensity) to to 255 (max intensity) if values are communicated
   * as Number types.
   * The RGB-like 0-255 range is provided for backward compatibility.
   *
   * When ch1,ch2,ch3,ch4 are given, "CMYK" color space is implied and each
   * value must be a in the range from 0.00 (0% concentration) to to
   * 1.00 (100% concentration)
   *
   * Because JavaScript treats fixed point numbers badly (rounds to
   * floating point nearest to binary representation) it is highly advised to
   * communicate the fractional numbers as String types, not JavaScript Number type.
   *
   * @param {Number|String} ch1 Color channel value or {string} ch1 color value in hexadecimal, example: '#FFFFFF'.
   * @param {Number} ch2 Color channel value.
   * @param {Number} ch3 Color channel value.
   * @param {Number} ch4 Color channel value.
   *
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name setFillColor
   */
  API.__private__.setFillColor = API.setFillColor = function(
    ch1,
    ch2,
    ch3,
    ch4
  ) {
    var options = {
      ch1: ch1,
      ch2: ch2,
      ch3: ch3,
      ch4: ch4,
      pdfColorType: "fill",
      precision: 2
    };

    fillColor = encodeColorString(options);
    out(fillColor);
    return this;
  };

  var textColor = options.textColor || "0 g";
  /**
   * Gets the text color for upcoming elements.
   *
   * @function
   * @instance
   * @returns {string} colorAsHex
   * @memberof jsPDF#
   * @name getTextColor
   */
  var getTextColor = (API.__private__.getTextColor = API.getTextColor = function() {
    return decodeColorString(textColor);
  });
  /**
   * Sets the text color for upcoming elements.
   *
   * Depending on the number of arguments given, Gray, RGB, or CMYK
   * color space is implied.
   *
   * When only ch1 is given, "Gray" color space is implied and it
   * must be a value in the range from 0.00 (solid black) to to 1.00 (white)
   * if values are communicated as String types, or in range from 0 (black)
   * to 255 (white) if communicated as Number type.
   * The RGB-like 0-255 range is provided for backward compatibility.
   *
   * When only ch1,ch2,ch3 are given, "RGB" color space is implied and each
   * value must be in the range from 0.00 (minimum intensity) to to 1.00
   * (max intensity) if values are communicated as String types, or
   * from 0 (min intensity) to to 255 (max intensity) if values are communicated
   * as Number types.
   * The RGB-like 0-255 range is provided for backward compatibility.
   *
   * When ch1,ch2,ch3,ch4 are given, "CMYK" color space is implied and each
   * value must be a in the range from 0.00 (0% concentration) to to
   * 1.00 (100% concentration)
   *
   * Because JavaScript treats fixed point numbers badly (rounds to
   * floating point nearest to binary representation) it is highly advised to
   * communicate the fractional numbers as String types, not JavaScript Number type.
   *
   * @param {Number|String} ch1 Color channel value or {string} ch1 color value in hexadecimal, example: '#FFFFFF'.
   * @param {Number} ch2 Color channel value.
   * @param {Number} ch3 Color channel value.
   * @param {Number} ch4 Color channel value.
   *
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name setTextColor
   */
  API.__private__.setTextColor = API.setTextColor = function(
    ch1,
    ch2,
    ch3,
    ch4
  ) {
    var options = {
      ch1: ch1,
      ch2: ch2,
      ch3: ch3,
      ch4: ch4,
      pdfColorType: "text",
      precision: 3
    };
    textColor = encodeColorString(options);

    return this;
  };

  var activeCharSpace = options.charSpace;

  /**
   * Get global value of CharSpace.
   *
   * @function
   * @instance
   * @returns {number} charSpace
   * @memberof jsPDF#
   * @name getCharSpace
   */
  var getCharSpace = (API.__private__.getCharSpace = API.getCharSpace = function() {
    return parseFloat(activeCharSpace || 0);
  });

  /**
   * Set global value of CharSpace.
   *
   * @param {number} charSpace
   * @function
   * @instance
   * @returns {jsPDF} jsPDF-instance
   * @memberof jsPDF#
   * @name setCharSpace
   */
  API.__private__.setCharSpace = API.setCharSpace = function(charSpace) {
    if (isNaN(charSpace)) {
      throw new Error("Invalid argument passed to jsPDF.setCharSpace");
    }
    activeCharSpace = charSpace;
    return this;
  };

  var lineCapID = 0;
  /**
   * Is an Object providing a mapping from human-readable to
   * integer flag values designating the varieties of line cap
   * and join styles.
   *
   * @memberof jsPDF#
   * @name CapJoinStyles
   */
  API.CapJoinStyles = {
    0: 0,
    butt: 0,
    but: 0,
    miter: 0,
    1: 1,
    round: 1,
    rounded: 1,
    circle: 1,
    2: 2,
    projecting: 2,
    project: 2,
    square: 2,
    bevel: 2
  };

  /**
   * Sets the line cap styles.
   * See {jsPDF.CapJoinStyles} for variants.
   *
   * @param {String|Number} style A string or number identifying the type of line cap.
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name setLineCap
   */
  API.__private__.setLineCap = API.setLineCap = function(style) {
    var id = API.CapJoinStyles[style];
    if (id === undefined) {
      throw new Error(
        "Line cap style of '" +
          style +
          "' is not recognized. See or extend .CapJoinStyles property for valid styles"
      );
    }
    lineCapID = id;
    out(id + " J");

    return this;
  };

  var lineJoinID = 0;
  /**
   * Sets the line join styles.
   * See {jsPDF.CapJoinStyles} for variants.
   *
   * @param {String|Number} style A string or number identifying the type of line join.
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name setLineJoin
   */
  API.__private__.setLineJoin = API.setLineJoin = function(style) {
    var id = API.CapJoinStyles[style];
    if (id === undefined) {
      throw new Error(
        "Line join style of '" +
          style +
          "' is not recognized. See or extend .CapJoinStyles property for valid styles"
      );
    }
    lineJoinID = id;
    out(id + " j");

    return this;
  };

  var miterLimit;
  /**
   * Sets the miterLimit property, which effects the maximum miter length.
   *
   * @param {number} length The length of the miter
   * @function
   * @instance
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name setLineMiterLimit
   */
  API.__private__.setLineMiterLimit = API.__private__.setMiterLimit = API.setLineMiterLimit = API.setMiterLimit = function(
    length
  ) {
    length = length || 0;
    if (isNaN(length)) {
      throw new Error("Invalid argument passed to jsPDF.setLineMiterLimit");
    }
    out(hpf(scale(length)) + " M");

    return this;
  };

  /**
   * An object representing a pdf graphics state.
   * @class GState
   */

  /**
   *
   * @param parameters A parameter object that contains all properties this graphics state wants to set.
   * Supported are: opacity, stroke-opacity
   * @constructor
   */
  API.GState = GState;

  /**
   * Sets a either previously added {@link GState} (via {@link addGState}) or a new {@link GState}.
   * @param {String|GState} gState If type is string, a previously added GState is used, if type is GState
   * it will be added before use.
   * @function
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name setGState
   */
  API.setGState = function(gState) {
    if (typeof gState === "string") {
      gState = gStates[gStatesMap[gState]];
    } else {
      gState = addGState(null, gState);
    }

    if (!gState.equals(activeGState)) {
      out("/" + gState.id + " gs");
      activeGState = gState;
    }
  };

  /**
   * Adds a new Graphics State. Duplicates are automatically eliminated.
   * @param {String} key Might also be null, if no later reference to this gState is needed
   * @param {Object} gState The gState object
   */
  var addGState = function(key, gState) {
    // only add it if it is not already present (the keys provided by the user must be unique!)
    if (key && gStatesMap[key]) return;
    var duplicate = false;
    for (var s in gStates) {
      if (gStates.hasOwnProperty(s)) {
        if (gStates[s].equals(gState)) {
          duplicate = true;
          break;
        }
      }
    }

    if (duplicate) {
      gState = gStates[s];
    } else {
      var gStateKey = "GS" + (Object.keys(gStates).length + 1).toString(10);
      gStates[gStateKey] = gState;
      gState.id = gStateKey;
    }

    // several user keys may point to the same GState object
    key && (gStatesMap[key] = gState.id);

    events.publish("addGState", gState);

    return gState;
  };

  /**
   * Adds a new {@link GState} for later use. See {@link setGState}.
   * @param {String} key
   * @param {GState} gState
   * @function
   * @instance
   * @returns {jsPDF}
   *
   * @memberof jsPDF#
   * @name addGState
   */
  API.addGState = function(key, gState) {
    addGState(key, gState);
    return this;
  };

  /**
   * Saves the current graphics state ("pushes it on the stack"). It can be restored by {@link restoreGraphicsState}
   * later. Here, the general pdf graphics state is meant, also including the current transformation matrix,
   * fill and stroke colors etc.
   * @function
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name saveGraphicsState
   */
  API.saveGraphicsState = function() {
    out("q");
    // as we cannot set font key and size independently we must keep track of both
    fontStateStack.push({
      key: activeFontKey,
      size: activeFontSize,
      color: textColor
    });
    return this;
  };

  /**
   * Restores a previously saved graphics state saved by {@link saveGraphicsState} ("pops the stack").
   * @function
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name restoreGraphicsState
   */
  API.restoreGraphicsState = function() {
    out("Q");

    // restore previous font state
    var fontState = fontStateStack.pop();
    activeFontKey = fontState.key;
    activeFontSize = fontState.size;
    textColor = fontState.color;

    activeGState = null;

    return this;
  };

  /**
   * Appends this matrix to the left of all previously applied matrices.
   *
   * @param {Matrix} matrix
   * @function
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name setCurrentTransformationMatrix
   */
  API.setCurrentTransformationMatrix = function(matrix) {
    out(matrix.toString() + " cm");
    return this;
  };

  /**
   * Inserts a debug comment into the generated pdf.
   * @function
   * @instance
   * @param {String} text
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name comment
   */
  API.comment = function(text) {
    out("#" + text);
    return this;
  };

  /**
   * Point
   */
  var Point = function(x, y) {
    var _x = x || 0;
    Object.defineProperty(this, "x", {
      enumerable: true,
      get: function() {
        return _x;
      },
      set: function(value) {
        if (!isNaN(value)) {
          _x = parseFloat(value);
        }
      }
    });

    var _y = y || 0;
    Object.defineProperty(this, "y", {
      enumerable: true,
      get: function() {
        return _y;
      },
      set: function(value) {
        if (!isNaN(value)) {
          _y = parseFloat(value);
        }
      }
    });

    var _type = "pt";
    Object.defineProperty(this, "type", {
      enumerable: true,
      get: function() {
        return _type;
      },
      set: function(value) {
        _type = value.toString();
      }
    });
    return this;
  };

  /**
   * Rectangle
   */
  var Rectangle = function(x, y, w, h) {
    Point.call(this, x, y);
    this.type = "rect";

    var _w = w || 0;
    Object.defineProperty(this, "w", {
      enumerable: true,
      get: function() {
        return _w;
      },
      set: function(value) {
        if (!isNaN(value)) {
          _w = parseFloat(value);
        }
      }
    });

    var _h = h || 0;
    Object.defineProperty(this, "h", {
      enumerable: true,
      get: function() {
        return _h;
      },
      set: function(value) {
        if (!isNaN(value)) {
          _h = parseFloat(value);
        }
      }
    });

    return this;
  };

  /**
   * FormObject/RenderTarget
   */

  var RenderTarget = function() {
    this.page = page;
    this.currentPage = currentPage;
    this.pages = pages.slice(0);
    this.pagesContext = pagesContext.slice(0);
    this.x = pageX;
    this.y = pageY;
    this.matrix = pageMatrix;
    this.width = getPageWidth(currentPage);
    this.height = getPageHeight(currentPage);
    this.outputDestination = outputDestination;

    this.id = ""; // set by endFormObject()
    this.objectNumber = -1; // will be set by putXObject()
  };

  RenderTarget.prototype.restore = function() {
    page = this.page;
    currentPage = this.currentPage;
    pagesContext = this.pagesContext;
    pages = this.pages;
    pageX = this.x;
    pageY = this.y;
    pageMatrix = this.matrix;
    setPageWidth(currentPage, this.width);
    setPageHeight(currentPage, this.height);
    outputDestination = this.outputDestination;
  };

  var beginNewRenderTarget = function(x, y, width, height, matrix) {
    // save current state
    renderTargetStack.push(new RenderTarget());

    // clear pages
    page = currentPage = 0;
    pages = [];
    pageX = x;
    pageY = y;

    pageMatrix = matrix;

    beginPage([width, height]);
  };

  var endFormObject = function(key) {
    // only add it if it is not already present (the keys provided by the user must be unique!)
    if (renderTargetMap[key]) {
      renderTargetStack.pop().restore();
      return;
    }

    // save the created xObject
    var newXObject = new RenderTarget();

    var xObjectId = "Xo" + (Object.keys(renderTargets).length + 1).toString(10);
    newXObject.id = xObjectId;

    renderTargetMap[key] = xObjectId;
    renderTargets[xObjectId] = newXObject;

    events.publish("addFormObject", newXObject);

    // restore state from stack
    renderTargetStack.pop().restore();
  };

  /**
   * Starts a new pdf form object, which means that all consequent draw calls target a new independent object
   * until {@link endFormObject} is called. The created object can be referenced and drawn later using
   * {@link doFormObject}. Nested form objects are possible.
   * x, y, width, height set the bounding box that is used to clip the content.
   *
   * @param {number} x
   * @param {number} y
   * @param {number} width
   * @param {number} height
   * @param {Matrix} matrix The matrix that will be applied to convert the form objects coordinate system to
   * the parent's.
   * @function
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name beginFormObject
   */
  API.beginFormObject = function(x, y, width, height, matrix) {
    // The user can set the output target to a new form object. Nested form objects are possible.
    // Currently, they use the resource dictionary of the surrounding stream. This should be changed, as
    // the PDF-Spec states:
    // "In PDF 1.2 and later versions, form XObjects may be independent of the content streams in which
    // they appear, and this is strongly recommended although not requiredIn PDF 1.2 and later versions,
    // form XObjects may be independent of the content streams in which they appear, and this is strongly
    // recommended although not required"
    beginNewRenderTarget(x, y, width, height, matrix);
    return this;
  };

  /**
   * Completes and saves the form object.
   * @param {String} key The key by which this form object can be referenced.
   * @function
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name endFormObject
   */
  API.endFormObject = function(key) {
    endFormObject(key);
    return this;
  };

  /**
   * Draws the specified form object by referencing to the respective pdf XObject created with
   * {@link API.beginFormObject} and {@link endFormObject}.
   * The location is determined by matrix.
   *
   * @param {String} key The key to the form object.
   * @param {Matrix} matrix The matrix applied before drawing the form object.
   * @function
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name doFormObject
   */
  API.doFormObject = function(key, matrix) {
    var xObject = renderTargets[renderTargetMap[key]];
    out("q");
    out(matrix.toString() + " cm");
    out("/" + xObject.id + " Do");
    out("Q");
    return this;
  };

  /**
   * Returns the form object specified by key.
   * @param key {String}
   * @returns {{x: number, y: number, width: number, height: number, matrix: Matrix}}
   * @function
   * @returns {jsPDF}
   * @memberof jsPDF#
   * @name getFormObject
   */
  API.getFormObject = function(key) {
    var xObject = renderTargets[renderTargetMap[key]];
    return {
      x: xObject.x,
      y: xObject.y,
      width: xObject.width,
      height: xObject.height,
      matrix: xObject.matrix
    };
  };

  /**
   * Saves as PDF document. An alias of jsPDF.output('save', 'filename.pdf').
   * Uses FileSaver.js-method saveAs.
   *
   * @memberof jsPDF#
   * @name save
   * @function
   * @instance
   * @param  {string} filename The filename including extension.
   * @param  {Object} options An Object with additional options, possible options: 'returnPromise'.
   * @returns {jsPDF|Promise} jsPDF-instance     */
  API.save = function(filename, options) {
    filename = filename || "generated.pdf";

    options = options || {};
    options.returnPromise = options.returnPromise || false;

    // @if MODULE_FORMAT!='cjs'
    if (options.returnPromise === false) {
      saveAs(getBlob(buildDocument()), filename);
      if (typeof saveAs.unload === "function") {
        if (globalObject.setTimeout) {
          setTimeout(saveAs.unload, 911);
        }
      }
      return this;
    } else {
      return new Promise(function(resolve, reject) {
        try {
          var result = saveAs(getBlob(buildDocument()), filename);
          if (typeof saveAs.unload === "function") {
            if (globalObject.setTimeout) {
              setTimeout(saveAs.unload, 911);
            }
          }
          resolve(result);
        } catch (e) {
          reject(e.message);
        }
      });
    }
    // @endif

    // @if MODULE_FORMAT='cjs'
    // eslint-disable-next-line no-unreachable
    var fs = require("fs");
    var buffer = Buffer.from(getArrayBuffer(buildDocument()));
    if (options.returnPromise === false) {
      fs.writeFileSync(filename, buffer);
    } else {
      return new Promise(function(resolve, reject) {
        fs.writeFile(filename, buffer, function(err) {
          if (err) {
            reject(err);
          } else {
            resolve();
          }
        });
      });
    }
    // @endif
  };

  // applying plugins (more methods) ON TOP of built-in API.
  // this is intentional as we allow plugins to override
  // built-ins
  for (var plugin in jsPDF.API) {
    if (jsPDF.API.hasOwnProperty(plugin)) {
      if (plugin === "events" && jsPDF.API.events.length) {
        (function(events, newEvents) {
          // jsPDF.API.events is a JS Array of Arrays
          // where each Array is a pair of event name, handler
          // Events were added by plugins to the jsPDF instantiator.
          // These are always added to the new instance and some ran
          // during instantiation.
          var eventname, handler_and_args, i;

          for (i = newEvents.length - 1; i !== -1; i--) {
            // subscribe takes 3 args: 'topic', function, runonce_flag
            // if undefined, runonce is false.
            // users can attach callback directly,
            // or they can attach an array with [callback, runonce_flag]
            // that's what the "apply" magic is for below.
            eventname = newEvents[i][0];
            handler_and_args = newEvents[i][1];
            events.subscribe.apply(
              events,
              [eventname].concat(
                typeof handler_and_args === "function"
                  ? [handler_and_args]
                  : handler_and_args
              )
            );
          }
        })(events, jsPDF.API.events);
      } else {
        API[plugin] = jsPDF.API[plugin];
      }
    }
  }

  var getPageWidth = (API.getPageWidth = function(pageNumber) {
    pageNumber = pageNumber || currentPage;
    return (
      (pagesContext[pageNumber].mediaBox.topRightX -
        pagesContext[pageNumber].mediaBox.bottomLeftX) /
      scaleFactor
    );
  });

  var setPageWidth = (API.setPageWidth = function(pageNumber, value) {
    pagesContext[pageNumber].mediaBox.topRightX =
      value * scaleFactor + pagesContext[pageNumber].mediaBox.bottomLeftX;
  });

  var getPageHeight = (API.getPageHeight = function(pageNumber) {
    pageNumber = pageNumber || currentPage;
    return (
      (pagesContext[pageNumber].mediaBox.topRightY -
        pagesContext[pageNumber].mediaBox.bottomLeftY) /
      scaleFactor
    );
  });

  var setPageHeight = (API.setPageHeight = function(pageNumber, value) {
    pagesContext[pageNumber].mediaBox.topRightY =
      value * scaleFactor + pagesContext[pageNumber].mediaBox.bottomLeftY;
  });

  /**
   * Object exposing internal API to plugins
   * @public
   * @ignore
   */
  API.internal = {
    pdfEscape: pdfEscape,
    getStyle: getStyle,
    getFont: getFontEntry,
    getFontSize: getFontSize,
    getCharSpace: getCharSpace,
    getTextColor: getTextColor,
    getLineHeight: getLineHeight,
    getLineHeightFactor: getLineHeightFactor,
    getLineWidth: getLineWidth,
    write: write,
    getHorizontalCoordinate: getHorizontalCoordinate,
    getVerticalCoordinate: getVerticalCoordinate,
    getCoordinateString: getHorizontalCoordinateString,
    getVerticalCoordinateString: getVerticalCoordinateString,
    collections: {},
    newObject: newObject,
    newAdditionalObject: newAdditionalObject,
    newObjectDeferred: newObjectDeferred,
    newObjectDeferredBegin: newObjectDeferredBegin,
    getFilters: getFilters,
    putStream: putStream,
    events: events,
    scaleFactor: scaleFactor,
    pageSize: {
      getWidth: function() {
        return getPageWidth(currentPage);
      },
      setWidth: function(value) {
        setPageWidth(currentPage, value);
      },
      getHeight: function() {
        return getPageHeight(currentPage);
      },
      setHeight: function(value) {
        setPageHeight(currentPage, value);
      }
    },
    encryptionOptions: encryptionOptions,
    encryption: encryption,
    getEncryptor: getEncryptor,
    output: output,
    getNumberOfPages: getNumberOfPages,
    pages: pages,
    out: out,
    f2: f2,
    f3: f3,
    getPageInfo: getPageInfo,
    getPageInfoByObjId: getPageInfoByObjId,
    getCurrentPageInfo: getCurrentPageInfo,
    getPDFVersion: getPdfVersion,
    Point: Point,
    Rectangle: Rectangle,
    Matrix: Matrix,
    hasHotfix: hasHotfix //Expose the hasHotfix check so plugins can also check them.
  };

  Object.defineProperty(API.internal.pageSize, "width", {
    get: function() {
      return getPageWidth(currentPage);
    },
    set: function(value) {
      setPageWidth(currentPage, value);
    },
    enumerable: true,
    configurable: true
  });
  Object.defineProperty(API.internal.pageSize, "height", {
    get: function() {
      return getPageHeight(currentPage);
    },
    set: function(value) {
      setPageHeight(currentPage, value);
    },
    enumerable: true,
    configurable: true
  });

  //////////////////////////////////////////////////////
  // continuing initialization of jsPDF Document object
  //////////////////////////////////////////////////////
  // Add the first page automatically
  addFonts.call(API, standardFonts);
  activeFontKey = "F1";
  _addPage(format, orientation);

  events.publish("initialized");
  return API;
}

/**
 * jsPDF.API is a STATIC property of jsPDF class.
 * jsPDF.API is an object you can add methods and properties to.
 * The methods / properties you add will show up in new jsPDF objects.
 *
 * One property is prepopulated. It is the 'events' Object. Plugin authors can add topics,
 * callbacks to this object. These will be reassigned to all new instances of jsPDF.
 *
 * @static
 * @public
 * @memberof jsPDF#
 * @name API
 *
 * @example
 * jsPDF.API.mymethod = function(){
 *   // 'this' will be ref to internal API object. see jsPDF source
 *   // , so you can refer to built-in methods like so:
 *   //     this.line(....)
 *   //     this.text(....)
 * }
 * var pdfdoc = new jsPDF()
 * pdfdoc.mymethod() // <- !!!!!!
 */
jsPDF.API = {
  events: []
};
/**
 * The version of jsPDF.
 * @name version
 * @type {string}
 * @memberof jsPDF#
 */
jsPDF.version = "0.0.0";

export { jsPDF, ShadingPattern, TilingPattern, GState };
export default jsPDF;
