pdf2json
Version:
PDF file parser that converts PDF binaries to JSON and text, powered by porting a fork of PDF.JS to Node.js
1,735 lines (1,571 loc) • 1.68 MB
JavaScript
import nodeUtil from 'util';import { Blob } from 'buffer';import { DOMParser } from '@xmldom/xmldom';import PDFAnno from './pdfanno.js';import Image from './pdfimage.js';import { createScratchCanvas } from './pdfcanvas.js';
export const PDFJS = {};
const globalScope = { console };
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals Cmd, ColorSpace, Dict, Blob, Name, PDFJS, Ref, URL */
"use strict";
//MQZ. Oct.10.2012. Moved globalScope definition to lib/pdf.js
//var globalScope = (typeof window === 'undefined') ? this : window;
var isWorker = typeof window == "undefined";
var ERRORS = 0,
WARNINGS = 1,
INFOS = 5;
var verbosity = WARNINGS;
var FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0];
var TextRenderingMode = {
FILL: 0,
STROKE: 1,
FILL_STROKE: 2,
INVISIBLE: 3,
FILL_ADD_TO_PATH: 4,
STROKE_ADD_TO_PATH: 5,
FILL_STROKE_ADD_TO_PATH: 6,
ADD_TO_PATH: 7,
FILL_STROKE_MASK: 3,
ADD_TO_PATH_FLAG: 4,
};
// The global PDFJS object exposes the API
// In production, it will be declared outside a global wrapper
// In development, it will be declared here
if (!globalScope.PDFJS) {
globalScope.PDFJS = {};
}
globalScope.PDFJS.pdfBug = false;
// All the possible operations for an operator list.
var OPS = (PDFJS.OPS = {
// Intentionally start from 1 so it is easy to spot bad operators that will be
// 0's.
dependency: 1,
setLineWidth: 2,
setLineCap: 3,
setLineJoin: 4,
setMiterLimit: 5,
setDash: 6,
setRenderingIntent: 7,
setFlatness: 8,
setGState: 9,
save: 10,
restore: 11,
transform: 12,
moveTo: 13,
lineTo: 14,
curveTo: 15,
curveTo2: 16,
curveTo3: 17,
closePath: 18,
rectangle: 19,
stroke: 20,
closeStroke: 21,
fill: 22,
eoFill: 23,
fillStroke: 24,
eoFillStroke: 25,
closeFillStroke: 26,
closeEOFillStroke: 27,
endPath: 28,
clip: 29,
eoClip: 30,
beginText: 31,
endText: 32,
setCharSpacing: 33,
setWordSpacing: 34,
setHScale: 35,
setLeading: 36,
setFont: 37,
setTextRenderingMode: 38,
setTextRise: 39,
moveText: 40,
setLeadingMoveText: 41,
setTextMatrix: 42,
nextLine: 43,
showText: 44,
showSpacedText: 45,
nextLineShowText: 46,
nextLineSetSpacingShowText: 47,
setCharWidth: 48,
setCharWidthAndBounds: 49,
setStrokeColorSpace: 50,
setFillColorSpace: 51,
setStrokeColor: 52,
setStrokeColorN: 53,
setFillColor: 54,
setFillColorN: 55,
setStrokeGray: 56,
setFillGray: 57,
setStrokeRGBColor: 58,
setFillRGBColor: 59,
setStrokeCMYKColor: 60,
setFillCMYKColor: 61,
shadingFill: 62,
beginInlineImage: 63,
beginImageData: 64,
endInlineImage: 65,
paintXObject: 66,
markPoint: 67,
markPointProps: 68,
beginMarkedContent: 69,
beginMarkedContentProps: 70,
endMarkedContent: 71,
beginCompat: 72,
endCompat: 73,
paintFormXObjectBegin: 74,
paintFormXObjectEnd: 75,
beginGroup: 76,
endGroup: 77,
beginAnnotations: 78,
endAnnotations: 79,
beginAnnotation: 80,
endAnnotation: 81,
paintJpegXObject: 82,
paintImageMaskXObject: 83,
paintImageMaskXObjectGroup: 84,
paintImageXObject: 85,
paintInlineImageXObject: 86,
paintInlineImageXObjectGroup: 87,
});
//MQZ.Mar.22 Disabled Operators (to prevent image painting & annotation default appearance)
//paintJpegXObject, paintImageMaskXObject, paintImageMaskXObjectGroup, paintImageXObject, paintInlineImageXObject, paintInlineImageXObjectGroup
var NO_OPS = (PDFJS.NO_OPS = [82, 83, 84, 85, 86, 87]);
var NO_OPS_RANGE = (PDFJS.NO_OPS_RANGE = [78, 79, 80, 81]); //range pairs, all ops with each pair will be skipped. !important!
// Use only for debugging purposes. This should not be used in any code that is
// in mozilla master.
var log = (function () {
var disableLogs = Boolean(Number(process?.env?.PDF2JSON_DISABLE_LOGS ?? "0"));
if (
!disableLogs &&
"console" in globalScope &&
"log" in globalScope["console"]
) {
return globalScope["console"]["log"].bind(globalScope["console"]);
} else {
return function nop() {};
}
})();
// A notice for devs that will not trigger the fallback UI. These are good
// for things that are helpful to devs, such as warning that Workers were
// disabled, which is important to devs but not end users.
function info(msg) {
if (verbosity >= INFOS) {
log("Info: " + msg);
PDFJS.LogManager.notify("info", msg);
}
}
// Non-fatal warnings that should trigger the fallback UI.
function warn(msg) {
if (verbosity >= WARNINGS) {
log("Warning: " + msg);
PDFJS.LogManager.notify("warn", msg);
}
}
// Fatal errors that should trigger the fallback UI and halt execution by
// throwing an exception.
function error(msg) {
// If multiple arguments were passed, pass them all to the log function.
if (arguments.length > 1) {
var logArguments = ["Error:"];
logArguments.push.apply(logArguments, arguments);
log.apply(null, logArguments);
// Join the arguments into a single string for the lines below.
msg = [].join.call(arguments, " ");
} else {
//log('Error: ' + msg);
}
// log(backtrace());
PDFJS.LogManager.notify('error', msg);
throw new Error(msg);
}
// Missing features that should trigger the fallback UI.
function TODO(what) {
warn("TODO: " + what);
}
function backtrace() {
try {
throw new Error();
} catch (e) {
return e.stack ? e.stack.split("\n").slice(2).join("\n") : "";
}
}
function assert(cond, msg) {
if (!cond) error(msg);
}
// Combines two URLs. The baseUrl shall be absolute URL. If the url is an
// absolute URL, it will be returned as is.
function combineUrl(baseUrl, url) {
if (!url) return baseUrl;
if (url.indexOf(":") >= 0) return url;
if (url.charAt(0) == "/") {
// absolute path
var i = baseUrl.indexOf("://");
i = baseUrl.indexOf("/", i + 3);
return baseUrl.substring(0, i) + url;
} else {
// relative path
var pathLength = baseUrl.length,
i;
i = baseUrl.lastIndexOf("#");
pathLength = i >= 0 ? i : pathLength;
i = baseUrl.lastIndexOf("?", pathLength);
pathLength = i >= 0 ? i : pathLength;
var prefixLength = baseUrl.lastIndexOf("/", pathLength);
return baseUrl.substring(0, prefixLength + 1) + url;
}
}
// Validates if URL is safe and allowed, e.g. to avoid XSS.
function isValidUrl(url, allowRelative) {
if (!url) {
return false;
}
var colon = url.indexOf(":");
if (colon < 0) {
return allowRelative;
}
var protocol = url.substring(0, colon);
switch (protocol) {
case "http":
case "https":
case "ftp":
case "mailto":
return true;
default:
return false;
}
}
PDFJS.isValidUrl = isValidUrl;
// In a well-formed PDF, |cond| holds. If it doesn't, subsequent
// behavior is undefined.
function assertWellFormed(cond, msg) {
if (!cond) error(msg);
}
var LogManager = (PDFJS.LogManager = (function LogManagerClosure() {
var loggers = [];
return {
addLogger: function logManager_addLogger(logger) {
loggers.push(logger);
},
notify: function (type, message) {
for (var i = 0, ii = loggers.length; i < ii; i++) {
var logger = loggers[i];
if (logger[type]) logger[type](message);
}
},
};
})());
function shadow(obj, prop, value) {
Object.defineProperty(obj, prop, {
value: value,
enumerable: true,
configurable: true,
writable: false,
});
return value;
}
var PasswordResponses = (PDFJS.PasswordResponses = {
NEED_PASSWORD: 1,
INCORRECT_PASSWORD: 2,
});
var PasswordException = (function PasswordExceptionClosure() {
function PasswordException(msg, code) {
this.name = "PasswordException";
this.message = msg;
this.code = code;
}
PasswordException.prototype = new Error();
PasswordException.constructor = PasswordException;
return PasswordException;
})();
var UnknownErrorException = (function UnknownErrorExceptionClosure() {
function UnknownErrorException(msg, details) {
this.name = "UnknownErrorException";
this.message = msg;
this.details = details;
}
UnknownErrorException.prototype = new Error();
UnknownErrorException.constructor = UnknownErrorException;
return UnknownErrorException;
})();
var InvalidPDFException = (function InvalidPDFExceptionClosure() {
function InvalidPDFException(msg) {
this.name = "InvalidPDFException";
this.message = msg;
}
InvalidPDFException.prototype = new Error();
InvalidPDFException.constructor = InvalidPDFException;
return InvalidPDFException;
})();
var MissingPDFException = (function MissingPDFExceptionClosure() {
function MissingPDFException(msg) {
this.name = "MissingPDFException";
this.message = msg;
}
MissingPDFException.prototype = new Error();
MissingPDFException.constructor = MissingPDFException;
return MissingPDFException;
})();
var NotImplementedException = (function NotImplementedExceptionClosure() {
function NotImplementedException(msg) {
this.message = msg;
}
NotImplementedException.prototype = new Error();
NotImplementedException.prototype.name = "NotImplementedException";
NotImplementedException.constructor = NotImplementedException;
return NotImplementedException;
})();
var MissingDataException = (function MissingDataExceptionClosure() {
function MissingDataException(begin, end) {
this.begin = begin;
this.end = end;
this.message = "Missing data [" + begin + ", " + end + ")";
}
MissingDataException.prototype = new Error();
MissingDataException.prototype.name = "MissingDataException";
MissingDataException.constructor = MissingDataException;
return MissingDataException;
})();
var XRefParseException = (function XRefParseExceptionClosure() {
function XRefParseException(msg) {
this.message = msg;
}
XRefParseException.prototype = new Error();
XRefParseException.prototype.name = "XRefParseException";
XRefParseException.constructor = XRefParseException;
return XRefParseException;
})();
function bytesToString(bytes) {
var str = "";
var length = bytes.length;
for (var n = 0; n < length; ++n) str += String.fromCharCode(bytes[n]);
return str;
}
function stringToBytes(str) {
var length = str.length;
var bytes = new Uint8Array(length);
for (var n = 0; n < length; ++n) bytes[n] = str.charCodeAt(n) & 0xff;
return bytes;
}
var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];
var Util = (PDFJS.Util = (function UtilClosure() {
function Util() {}
Util.makeCssRgb = function Util_makeCssRgb(rgb) {
return "rgb(" + rgb[0] + "," + rgb[1] + "," + rgb[2] + ")";
};
Util.makeCssCmyk = function Util_makeCssCmyk(cmyk) {
var rgb = ColorSpace.singletons.cmyk.getRgb(cmyk, 0);
return Util.makeCssRgb(rgb);
};
// Concatenates two transformation matrices together and returns the result.
Util.transform = function Util_transform(m1, m2) {
return [
m1[0] * m2[0] + m1[2] * m2[1],
m1[1] * m2[0] + m1[3] * m2[1],
m1[0] * m2[2] + m1[2] * m2[3],
m1[1] * m2[2] + m1[3] * m2[3],
m1[0] * m2[4] + m1[2] * m2[5] + m1[4],
m1[1] * m2[4] + m1[3] * m2[5] + m1[5],
];
};
// For 2d affine transforms
Util.applyTransform = function Util_applyTransform(p, m) {
var xt = p[0] * m[0] + p[1] * m[2] + m[4];
var yt = p[0] * m[1] + p[1] * m[3] + m[5];
return [xt, yt];
};
Util.applyInverseTransform = function Util_applyInverseTransform(p, m) {
var d = m[0] * m[3] - m[1] * m[2];
var xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;
var yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;
return [xt, yt];
};
// Applies the transform to the rectangle and finds the minimum axially
// aligned bounding box.
Util.getAxialAlignedBoundingBox = function Util_getAxialAlignedBoundingBox(
r,
m
) {
var p1 = Util.applyTransform(r, m);
var p2 = Util.applyTransform(r.slice(2, 4), m);
var p3 = Util.applyTransform([r[0], r[3]], m);
var p4 = Util.applyTransform([r[2], r[1]], m);
return [
Math.min(p1[0], p2[0], p3[0], p4[0]),
Math.min(p1[1], p2[1], p3[1], p4[1]),
Math.max(p1[0], p2[0], p3[0], p4[0]),
Math.max(p1[1], p2[1], p3[1], p4[1]),
];
};
Util.inverseTransform = function Util_inverseTransform(m) {
var d = m[0] * m[3] - m[1] * m[2];
return [
m[3] / d,
-m[1] / d,
-m[2] / d,
m[0] / d,
(m[2] * m[5] - m[4] * m[3]) / d,
(m[4] * m[1] - m[5] * m[0]) / d,
];
};
// Apply a generic 3d matrix M on a 3-vector v:
// | a b c | | X |
// | d e f | x | Y |
// | g h i | | Z |
// M is assumed to be serialized as [a,b,c,d,e,f,g,h,i],
// with v as [X,Y,Z]
Util.apply3dTransform = function Util_apply3dTransform(m, v) {
return [
m[0] * v[0] + m[1] * v[1] + m[2] * v[2],
m[3] * v[0] + m[4] * v[1] + m[5] * v[2],
m[6] * v[0] + m[7] * v[1] + m[8] * v[2],
];
};
// This calculation uses Singular Value Decomposition.
// The SVD can be represented with formula A = USV. We are interested in the
// matrix S here because it represents the scale values.
Util.singularValueDecompose2dScale =
function Util_singularValueDecompose2dScale(m) {
var transpose = [m[0], m[2], m[1], m[3]];
// Multiply matrix m with its transpose.
var a = m[0] * transpose[0] + m[1] * transpose[2];
var b = m[0] * transpose[1] + m[1] * transpose[3];
var c = m[2] * transpose[0] + m[3] * transpose[2];
var d = m[2] * transpose[1] + m[3] * transpose[3];
// Solve the second degree polynomial to get roots.
var first = (a + d) / 2;
var second = Math.sqrt((a + d) * (a + d) - 4 * (a * d - c * b)) / 2;
var sx = first + second || 1;
var sy = first - second || 1;
// Scale values are the square roots of the eigenvalues.
return [Math.sqrt(sx), Math.sqrt(sy)];
};
// Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2)
// For coordinate systems whose origin lies in the bottom-left, this
// means normalization to (BL,TR) ordering. For systems with origin in the
// top-left, this means (TL,BR) ordering.
Util.normalizeRect = function Util_normalizeRect(rect) {
var r = rect.slice(0); // clone rect
if (rect[0] > rect[2]) {
r[0] = rect[2];
r[2] = rect[0];
}
if (rect[1] > rect[3]) {
r[1] = rect[3];
r[3] = rect[1];
}
return r;
};
// Returns a rectangle [x1, y1, x2, y2] corresponding to the
// intersection of rect1 and rect2. If no intersection, returns 'null'
// The rectangle coordinates of rect1, rect2 should be [x1, y1, x2, y2]
Util.intersect = function Util_intersect(rect1, rect2) {
const xLow = Math.max(
Math.min(rect1[0], rect1[2]),
Math.min(rect2[0], rect2[2])
);
const xHigh = Math.min(
Math.max(rect1[0], rect1[2]),
Math.max(rect2[0], rect2[2])
);
if (xLow > xHigh) {
return null;
}
const yLow = Math.max(
Math.min(rect1[1], rect1[3]),
Math.min(rect2[1], rect2[3])
);
const yHigh = Math.min(
Math.max(rect1[1], rect1[3]),
Math.max(rect2[1], rect2[3])
);
if (yLow > yHigh) {
return null;
}
return [xLow, yLow, xHigh, yHigh];
};
Util.sign = function Util_sign(num) {
return num < 0 ? -1 : 1;
};
// TODO(mack): Rename appendToArray
Util.concatenateToArray = function concatenateToArray(arr1, arr2) {
Array.prototype.push.apply(arr1, arr2);
};
Util.prependToArray = function concatenateToArray(arr1, arr2) {
Array.prototype.unshift.apply(arr1, arr2);
};
Util.extendObj = function extendObj(obj1, obj2) {
for (var key in obj2) {
obj1[key] = obj2[key];
}
};
Util.getInheritableProperty = function Util_getInheritableProperty(
dict,
name
) {
while (dict && !dict.has(name)) {
dict = dict.get("Parent");
}
if (!dict) {
return null;
}
return dict.get(name);
};
Util.inherit = function Util_inherit(sub, base, prototype) {
sub.prototype = Object.create(base.prototype);
sub.prototype.constructor = sub;
for (var prop in prototype) {
sub.prototype[prop] = prototype[prop];
}
};
Util.loadScript = function Util_loadScript(src, callback) {
var script = document.createElement("script");
var loaded = false;
script.setAttribute("src", src);
if (callback) {
script.onload = function () {
if (!loaded) {
callback();
}
loaded = true;
};
}
document.getElementsByTagName("head")[0].appendChild(script);
};
return Util;
})());
var PageViewport = (PDFJS.PageViewport = (function PageViewportClosure() {
function PageViewport(viewBox, scale, rotation, offsetX, offsetY, dontFlip) {
this.viewBox = viewBox;
this.scale = scale;
this.rotation = rotation;
this.offsetX = offsetX;
this.offsetY = offsetY;
// creating transform to convert pdf coordinate system to the normal
// canvas like coordinates taking in account scale and rotation
var centerX = (viewBox[2] + viewBox[0]) / 2;
var centerY = (viewBox[3] + viewBox[1]) / 2;
var rotateA, rotateB, rotateC, rotateD;
rotation = rotation % 360;
rotation = rotation < 0 ? rotation + 360 : rotation;
switch (rotation) {
case 180:
rotateA = -1;
rotateB = 0;
rotateC = 0;
rotateD = 1;
break;
case 90:
rotateA = 0;
rotateB = 1;
rotateC = 1;
rotateD = 0;
break;
case 270:
rotateA = 0;
rotateB = -1;
rotateC = -1;
rotateD = 0;
break;
//case 0:
default:
rotateA = 1;
rotateB = 0;
rotateC = 0;
rotateD = -1;
break;
}
if (dontFlip) {
rotateC = -rotateC;
rotateD = -rotateD;
}
var offsetCanvasX, offsetCanvasY;
var width, height;
if (rotateA === 0) {
offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX;
offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY;
width = Math.abs(viewBox[3] - viewBox[1]) * scale;
height = Math.abs(viewBox[2] - viewBox[0]) * scale;
} else {
offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX;
offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY;
width = Math.abs(viewBox[2] - viewBox[0]) * scale;
height = Math.abs(viewBox[3] - viewBox[1]) * scale;
}
// creating transform for the following operations:
// translate(-centerX, -centerY), rotate and flip vertically,
// scale, and translate(offsetCanvasX, offsetCanvasY)
this.transform = [
rotateA * scale,
rotateB * scale,
rotateC * scale,
rotateD * scale,
offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY,
offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY,
];
this.width = width;
this.height = height;
this.fontScale = scale;
}
PageViewport.prototype = {
clone: function PageViewPort_clone(args) {
args = args || {};
var scale = "scale" in args ? args.scale : this.scale;
var rotation = "rotation" in args ? args.rotation : this.rotation;
return new PageViewport(
this.viewBox.slice(),
scale,
rotation,
this.offsetX,
this.offsetY,
args.dontFlip
);
},
convertToViewportPoint: function PageViewport_convertToViewportPoint(x, y) {
return Util.applyTransform([x, y], this.transform);
},
convertToViewportRectangle:
function PageViewport_convertToViewportRectangle(rect) {
var tl = Util.applyTransform([rect[0], rect[1]], this.transform);
var br = Util.applyTransform([rect[2], rect[3]], this.transform);
return [tl[0], tl[1], br[0], br[1]];
},
convertToPdfPoint: function PageViewport_convertToPdfPoint(x, y) {
return Util.applyInverseTransform([x, y], this.transform);
},
};
return PageViewport;
})());
var PDFStringTranslateTable = [
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2d8,
0x2c7, 0x2c6, 0x2d9, 0x2dd, 0x2db, 0x2da, 0x2dc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014, 0x2013, 0x192,
0x2044, 0x2039, 0x203a, 0x2212, 0x2030, 0x201e, 0x201c, 0x201d, 0x2018,
0x2019, 0x201a, 0x2122, 0xfb01, 0xfb02, 0x141, 0x152, 0x160, 0x178, 0x17d,
0x131, 0x142, 0x153, 0x161, 0x17e, 0, 0x20ac,
];
function stringToPDFString(str) {
var i,
n = str.length,
str2 = "";
if (str[0] === "\xFE" && str[1] === "\xFF") {
// UTF16BE BOM
for (i = 2; i < n; i += 2)
str2 += String.fromCharCode(
(str.charCodeAt(i) << 8) | str.charCodeAt(i + 1)
);
} else {
for (i = 0; i < n; ++i) {
var code = PDFStringTranslateTable[str.charCodeAt(i)];
str2 += code ? String.fromCharCode(code) : str.charAt(i);
}
}
return str2;
}
function stringToUTF8String(str) {
return decodeURIComponent(escape(str));
}
function isEmptyObj(obj) {
for (var key in obj) {
return false;
}
return true;
}
function isBool(v) {
return typeof v == "boolean";
}
function isInt(v) {
return typeof v == "number" && (v | 0) == v;
}
function isNum(v) {
return typeof v == "number";
}
function isString(v) {
return typeof v == "string";
}
function isNull(v) {
return v === null;
}
function isName(v) {
return v instanceof Name;
}
function isCmd(v, cmd) {
return v instanceof Cmd && (!cmd || v.cmd == cmd);
}
function isDict(v, type) {
if (!(v instanceof Dict)) {
return false;
}
if (!type) {
return true;
}
var dictType = v.get("Type");
return isName(dictType) && dictType.name == type;
}
function isArray(v) {
return v instanceof Array;
}
function isStream(v) {
return (
typeof v == "object" && v !== null && v !== undefined && "getBytes" in v
);
}
function isArrayBuffer(v) {
return (
typeof v == "object" && v !== null && v !== undefined && "byteLength" in v
);
}
function isRef(v) {
return v instanceof Ref;
}
function isPDFFunction(v) {
var fnDict;
if (typeof v != "object") return false;
else if (isDict(v)) fnDict = v;
else if (isStream(v)) fnDict = v.dict;
else return false;
return fnDict.has("FunctionType");
}
/**
* The following promise implementation tries to generally implment the
* Promise/A+ spec. Some notable differences from other promise libaries are:
* - There currently isn't a seperate deferred and promise object.
* - Unhandled rejections eventually show an error if they aren't handled.
*
* Based off of the work in:
* https://bugzilla.mozilla.org/show_bug.cgi?id=810490
*/
var Promise = (PDFJS.Promise = (function PromiseClosure() {
var STATUS_PENDING = 0;
var STATUS_RESOLVED = 1;
var STATUS_REJECTED = 2;
// In an attempt to avoid silent exceptions, unhandled rejections are
// tracked and if they aren't handled in a certain amount of time an
// error is logged.
var REJECTION_TIMEOUT = 500;
var HandlerManager = {
handlers: [],
running: false,
unhandledRejections: [],
pendingRejectionCheck: false,
scheduleHandlers: function scheduleHandlers(promise) {
if (promise._status == STATUS_PENDING) {
return;
}
this.handlers = this.handlers.concat(promise._handlers);
promise._handlers = [];
if (this.running) {
return;
}
this.running = true;
setTimeout(this.runHandlers.bind(this), 0);
},
runHandlers: function runHandlers() {
while (this.handlers.length > 0) {
var handler = this.handlers.shift();
var nextStatus = handler.thisPromise._status;
var nextValue = handler.thisPromise._value;
try {
if (nextStatus === STATUS_RESOLVED) {
if (typeof handler.onResolve == "function") {
nextValue = handler.onResolve(nextValue);
}
} else if (typeof handler.onReject === "function") {
nextValue = handler.onReject(nextValue);
nextStatus = STATUS_RESOLVED;
if (handler.thisPromise._unhandledRejection) {
this.removeUnhandeledRejection(handler.thisPromise);
}
}
} catch (ex) {
nextStatus = STATUS_REJECTED;
nextValue = ex;
}
handler.nextPromise._updateStatus(nextStatus, nextValue);
}
this.running = false;
},
addUnhandledRejection: function addUnhandledRejection(promise) {
this.unhandledRejections.push({
promise: promise,
time: Date.now(),
});
this.scheduleRejectionCheck();
},
removeUnhandeledRejection: function removeUnhandeledRejection(promise) {
promise._unhandledRejection = false;
for (var i = 0; i < this.unhandledRejections.length; i++) {
if (this.unhandledRejections[i].promise === promise) {
this.unhandledRejections.splice(i);
i--;
}
}
},
scheduleRejectionCheck: function scheduleRejectionCheck() {
if (this.pendingRejectionCheck) {
return;
}
this.pendingRejectionCheck = true;
setTimeout(
function rejectionCheck() {
this.pendingRejectionCheck = false;
var now = Date.now();
for (var i = 0; i < this.unhandledRejections.length; i++) {
if (now - this.unhandledRejections[i].time > REJECTION_TIMEOUT) {
var unhandled = this.unhandledRejections[i].promise._value;
var msg = "Unhandled rejection: " + unhandled;
if (unhandled.stack) {
msg += "\n" + unhandled.stack;
}
warn(msg);
this.unhandledRejections.splice(i);
i--;
}
}
if (this.unhandledRejections.length) {
this.scheduleRejectionCheck();
}
}.bind(this),
REJECTION_TIMEOUT
);
},
};
function Promise() {
this._status = STATUS_PENDING;
this._handlers = [];
}
/**
* Builds a promise that is resolved when all the passed in promises are
* resolved.
* @param {array} array of data and/or promises to wait for.
* @return {Promise} New dependant promise.
*/
Promise.all = function Promise_all(promises) {
var deferred = new Promise();
var unresolved = promises.length;
var results = [];
if (unresolved === 0) {
deferred.resolve(results);
return deferred;
}
function reject(reason) {
if (deferred._status === STATUS_REJECTED) {
return;
}
results = [];
deferred.reject(reason);
}
for (var i = 0, ii = promises.length; i < ii; ++i) {
var promise = promises[i];
var resolve = (function (i) {
return function (value) {
if (deferred._status === STATUS_REJECTED) {
return;
}
results[i] = value;
unresolved--;
if (unresolved === 0) deferred.resolve(results);
};
})(i);
if (Promise.isPromise(promise)) {
promise.then(resolve, reject);
} else {
resolve(promise);
}
}
return deferred;
};
/**
* Checks if the value is likely a promise (has a 'then' function).
* @return {boolean} true if x is thenable
*/
Promise.isPromise = function Promise_isPromise(value) {
return value && typeof value.then === "function";
};
Promise.prototype = {
_status: null,
_value: null,
_handlers: null,
_unhandledRejection: null,
_updateStatus: function Promise__updateStatus(status, value) {
if (
this._status === STATUS_RESOLVED ||
this._status === STATUS_REJECTED
) {
return;
}
if (status == STATUS_RESOLVED && Promise.isPromise(value)) {
value.then(
this._updateStatus.bind(this, STATUS_RESOLVED),
this._updateStatus.bind(this, STATUS_REJECTED)
);
return;
}
this._status = status;
this._value = value;
if (status === STATUS_REJECTED && this._handlers.length === 0) {
this._unhandledRejection = true;
HandlerManager.addUnhandledRejection(this);
}
HandlerManager.scheduleHandlers(this);
},
get isResolved() {
return this._status === STATUS_RESOLVED;
},
get isRejected() {
return this._status === STATUS_REJECTED;
},
resolve: function Promise_resolve(value) {
this._updateStatus(STATUS_RESOLVED, value);
},
reject: function Promise_reject(reason) {
this._updateStatus(STATUS_REJECTED, reason);
},
then: function Promise_then(onResolve, onReject) {
var nextPromise = new Promise();
this._handlers.push({
thisPromise: this,
onResolve: onResolve,
onReject: onReject,
nextPromise: nextPromise,
});
HandlerManager.scheduleHandlers(this);
return nextPromise;
},
};
return Promise;
})());
var StatTimer = (function StatTimerClosure() {
function rpad(str, pad, length) {
while (str.length < length) str += pad;
return str;
}
function StatTimer() {
this.started = {};
this.times = [];
this.enabled = true;
}
StatTimer.prototype = {
time: function StatTimer_time(name) {
if (!this.enabled) return;
if (name in this.started) warn("Timer is already running for " + name);
this.started[name] = Date.now();
},
timeEnd: function StatTimer_timeEnd(name) {
if (!this.enabled) return;
if (!(name in this.started))
warn("Timer has not been started for " + name);
this.times.push({
name: name,
start: this.started[name],
end: Date.now(),
});
// Remove timer from started so it can be called again.
delete this.started[name];
},
toString: function StatTimer_toString() {
var times = this.times;
var out = "";
// Find the longest name for padding purposes.
var longest = 0;
for (var i = 0, ii = times.length; i < ii; ++i) {
var name = times[i]["name"];
if (name.length > longest) longest = name.length;
}
for (var i = 0, ii = times.length; i < ii; ++i) {
var span = times[i];
var duration = span.end - span.start;
out += rpad(span["name"], " ", longest) + " " + duration + "ms\n";
}
return out;
},
};
return StatTimer;
})();
PDFJS.createBlob = function createBlob(data, contentType) {
return new Blob([data], { type: contentType });
};
PDFJS.createObjectURL = (function createObjectURLClosure() {
if (typeof URL !== "undefined" && URL.createObjectURL) {
return function createObjectURL(data, contentType) {
var blob = PDFJS.createBlob(data, contentType);
return URL.createObjectURL(blob);
};
}
// Blob/createObjectURL is not available, falling back to data schema.
var digits =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
return function createObjectURL(data, contentType) {
var buffer = "data:" + contentType + ";base64,";
for (var i = 0, ii = data.length; i < ii; i += 3) {
var b1 = data[i] & 0xff;
var b2 = data[i + 1] & 0xff;
var b3 = data[i + 2] & 0xff;
var d1 = b1 >> 2,
d2 = ((b1 & 3) << 4) | (b2 >> 4);
var d3 = i + 1 < ii ? ((b2 & 0xf) << 2) | (b3 >> 6) : 64;
var d4 = i + 2 < ii ? b3 & 0x3f : 64;
buffer += digits[d1] + digits[d2] + digits[d3] + digits[d4];
}
return buffer;
};
})();
function MessageHandler(name, comObj) {
this.name = name;
this.comObj = comObj;
this.callbackIndex = 1;
this.postMessageTransfers = true;
var callbacks = (this.callbacks = {});
var ah = (this.actionHandler = {});
ah["console_log"] = [
function ahConsoleLog(data) {
log.apply(null, data);
},
];
// If there's no console available, console_error in the
// action handler will do nothing.
if ("console" in globalScope) {
ah["console_error"] = [
function ahConsoleError(data) {
globalScope["console"].error.apply(null, data);
},
];
} else {
ah["console_error"] = [
function ahConsoleError(data) {
log.apply(null, data);
},
];
}
ah["_warn"] = [
function ah_Warn(data) {
warn(data);
},
];
if (typeof comObj === "object") {
comObj.onmessage = function messageHandlerComObjOnMessage(event) {
var data = event.data;
if (data.isReply) {
var callbackId = data.callbackId;
if (data.callbackId in callbacks) {
var callback = callbacks[callbackId];
delete callbacks[callbackId];
callback(data.data);
} else {
error("Cannot resolve callback " + callbackId);
}
} else if (data.action in ah) {
var action = ah[data.action];
if (data.callbackId) {
var promise = new Promise();
promise.then(function (resolvedData) {
comObj.postMessage({
isReply: true,
callbackId: data.callbackId,
data: resolvedData,
});
});
action[0].call(action[1], data.data, promise);
} else {
action[0].call(action[1], data.data);
}
} else {
error("Unkown action from worker: " + data.action);
}
};
}
}
MessageHandler.prototype = {
on: function messageHandlerOn(actionName, handler, scope) {
var ah = this.actionHandler;
if (ah[actionName]) {
error('There is already an actionName called "' + actionName + '"');
}
ah[actionName] = [handler, scope];
},
/**
* Sends a message to the comObj to invoke the action with the supplied data.
* @param {String} actionName Action to call.
* @param {JSON} data JSON data to send.
* @param {function} [callback] Optional callback that will handle a reply.
* @param {Array} [transfers] Optional list of transfers/ArrayBuffers
*/
send: function messageHandlerSend(actionName, data, callback, transfers) {
var message = {
action: actionName,
data: data,
};
if (callback) {
var callbackId = this.callbackIndex++;
this.callbacks[callbackId] = callback;
message.callbackId = callbackId;
}
if (transfers && this.postMessageTransfers) {
this.comObj.postMessage(message, transfers);
} else {
this.comObj.postMessage(message);
}
},
};
function loadJpegStream(id, imageUrl, objs) {
var img = new Image();
img.onload = function loadJpegStream_onloadClosure() {
objs.resolve(id, img);
};
// img.src = imageUrl;
//MQZ. Apr.09.2013 calls windows.btoa safely
img.src = "data:image/jpeg;base64," + img.btoa(imageUrl);
}
//MQZ Oct.18.2013 expose util methods
nodeUtil.p2jlog = log;
nodeUtil.p2jinfo = info;
nodeUtil.p2jwarn = warn;
nodeUtil.p2jerror = error;
nodeUtil.verbosity = function (verbo) {
if (isNaN(verbo)) {
verbosity = WARNINGS;
} else {
if (verbo <= ERRORS) {
verbosity = ERRORS;
} else if (verbo >= INFOS) {
verbosity = INFOS;
} else verbosity = verbo;
}
};
nodeUtil.verbosity();
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals error, info, isArray, isDict, isName, isStream, isString,
PDFFunction, warn, shadow, TODO */
'use strict';
var ColorSpace = (function ColorSpaceClosure() {
// Constructor should define this.numComps, this.defaultColor, this.name
function ColorSpace() {
error('should not call ColorSpace constructor');
}
ColorSpace.prototype = {
/**
* Converts the color value to the RGB color. The color components are
* located in the src array starting from the srcOffset. Returns the array
* of the rgb components, each value ranging from [0,255].
*/
getRgb: function ColorSpace_getRgb(src, srcOffset) {
error('Should not call ColorSpace.getRgb');
},
/**
* Converts the color value to the RGB color, similar to the getRgb method.
* The result placed into the dest array starting from the destOffset.
*/
getRgbItem: function ColorSpace_getRgb(src, srcOffset, dest, destOffset) {
error('Should not call ColorSpace.getRgbItem');
},
/**
* Converts the specified number of the color values to the RGB colors.
* The colors are located in the src array starting from the srcOffset.
* The result is placed into the dest array starting from the destOffset.
* The src array items shall be in [0,2^bits) range, the dest array items
* will be in [0,255] range.
*/
getRgbBuffer: function ColorSpace_getRgbBuffer(src, srcOffset, count,
dest, destOffset, bits) {
error('Should not call ColorSpace.getRgbBuffer');
},
/**
* Determines amount of the bytes is required to store the reslut of the
* conversion that done by the getRgbBuffer method.
*/
getOutputLength: function ColorSpace_getOutputLength(inputLength) {
error('Should not call ColorSpace.getOutputLength');
},
/**
* Returns true if source data will be equal the result/output data.
*/
isPassthrough: function ColorSpace_isPassthrough(bits) {
return false;
},
/**
* Creates the output buffer and converts the specified number of the color
* values to the RGB colors, similar to the getRgbBuffer.
*/
createRgbBuffer: function ColorSpace_createRgbBuffer(src, srcOffset,
count, bits) {
if (this.isPassthrough(bits)) {
return src.subarray(srcOffset);
}
var dest = new Uint8Array(count * 3);
var numComponentColors = 1 << bits;
// Optimization: create a color map when there is just one component and
// we are converting more colors than the size of the color map. We
// don't build the map if the colorspace is gray or rgb since those
// methods are faster than building a map. This mainly offers big speed
// ups for indexed and alternate colorspaces.
if (this.numComps === 1 && count > numComponentColors &&
this.name !== 'DeviceGray' && this.name !== 'DeviceRGB') {
// TODO it may be worth while to cache the color map. While running
// testing I never hit a cache so I will leave that out for now (perhaps
// we are reparsing colorspaces too much?).
var allColors = bits <= 8 ? new Uint8Array(numComponentColors) :
new Uint16Array(numComponentColors);
for (var i = 0; i < numComponentColors; i++) {
allColors[i] = i;
}
var colorMap = new Uint8Array(numComponentColors * 3);
this.getRgbBuffer(allColors, 0, numComponentColors, colorMap, 0, bits);
var destOffset = 0;
for (var i = 0; i < count; ++i) {
var key = src[srcOffset++] * 3;
dest[destOffset++] = colorMap[key];
dest[destOffset++] = colorMap[key + 1];
dest[destOffset++] = colorMap[key + 2];
}
return dest;
}
this.getRgbBuffer(src, srcOffset, count, dest, 0, bits);
return dest;
},
/**
* True if the colorspace has components in the default range of [0, 1].
* This should be true for all colorspaces except for lab color spaces
* which are [0,100], [-128, 127], [-128, 127].
*/
usesZeroToOneRange: true
};
ColorSpace.parse = function ColorSpace_parse(cs, xref, res) {
var IR = ColorSpace.parseToIR(cs, xref, res);
if (IR instanceof AlternateCS)
return IR;
return ColorSpace.fromIR(IR);
};
ColorSpace.fromIR = function ColorSpace_fromIR(IR) {
var name = isArray(IR) ? IR[0] : IR;
switch (name) {
case 'DeviceGrayCS':
return this.singletons.gray;
case 'DeviceRgbCS':
return this.singletons.rgb;
case 'DeviceCmykCS':
return this.singletons.cmyk;
case 'CalGrayCS':
var whitePoint = IR[1].WhitePoint;
var blackPoint = IR[1].BlackPoint;
var gamma = IR[1].Gamma;
return new CalGrayCS(whitePoint, blackPoint, gamma);
case 'PatternCS':
var basePatternCS = IR[1];
if (basePatternCS)
basePatternCS = ColorSpace.fromIR(basePatternCS);
return new PatternCS(basePatternCS);
case 'IndexedCS':
var baseIndexedCS = IR[1];
var hiVal = IR[2];
var lookup = IR[3];
return new IndexedCS(ColorSpace.fromIR(baseIndexedCS), hiVal, lookup);
case 'AlternateCS':
var numComps = IR[1];
var alt = IR[2];
var tintFnIR = IR[3];
return new AlternateCS(numComps, ColorSpace.fromIR(alt),
PDFFunction.fromIR(tintFnIR));
case 'LabCS':
var whitePoint = IR[1].WhitePoint;
var blackPoint = IR[1].BlackPoint;
var range = IR[1].Range;
return new LabCS(whitePoint, blackPoint, range);
default:
error('Unkown name ' + name);
}
return null;
};
ColorSpace.parseToIR = function ColorSpace_parseToIR(cs, xref, res) {
if (isName(cs)) {
var colorSpaces = res.get('ColorSpace');
if (isDict(colorSpaces)) {
var refcs = colorSpaces.get(cs.name);
if (refcs)
cs = refcs;
}
}
cs = xref.fetchIfRef(cs);
var mode;
if (isName(cs)) {
mode = cs.name;
this.mode = mode;
switch (mode) {
case 'DeviceGray':
case 'G':
return 'DeviceGrayCS';
case 'DeviceRGB':
case 'RGB':
return 'DeviceRgbCS';
case 'DeviceCMYK':
case 'CMYK':
return 'DeviceCmykCS';
case 'Pattern':
return ['PatternCS', null];
default:
error('unrecognized colorspace ' + mode);
}
} else if (isArray(cs)) {
mode = cs[0].name;
this.mode = mode;
switch (mode) {
case 'DeviceGray':
case 'G':
return 'DeviceGrayCS';
case 'DeviceRGB':
case 'RGB':
return 'DeviceRgbCS';
case 'DeviceCMYK':
case 'CMYK':
return 'DeviceCmykCS';
case 'CalGray':
var params = cs[1].getAll();
return ['CalGrayCS', params];
case 'CalRGB':
return 'DeviceRgbCS';
case 'ICCBased':
var stream = xref.fetchIfRef(cs[1]);
var dict = stream.dict;
var numComps = dict.get('N');
if (numComps == 1)
return 'DeviceGrayCS';
if (numComps == 3)
return 'DeviceRgbCS';
if (numComps == 4)
return 'DeviceCmykCS';
break;
case 'Pattern':
var basePatternCS = cs[1];
if (basePatternCS)
basePatternCS = ColorSpace.parseToIR(basePatternCS, xref, res);
return ['PatternCS', basePatternCS];
case 'Indexed':
case 'I':
var baseIndexedCS = ColorSpace.parseToIR(cs[1], xref, res);
var hiVal = cs[2] + 1;
var lookup = xref.fetchIfRef(cs[3]);
if (isStream(lookup)) {
lookup = lookup.getBytes();
}
return ['IndexedCS', baseIndexedCS, hiVal, lookup];
case 'Separation':
case 'DeviceN':
var name = cs[1];
var numComps = 1;
if (isName(name))
numComps = 1;
else if (isArray(name))
numComps = name.length;
var alt = ColorSpace.parseToIR(cs[2], xref, res);
var tintFnIR = PDFFunction.getIR(xref, xref.fetchIfRef(cs[3]));
return ['AlternateCS', numComps, alt, tintFnIR];
case 'Lab':
var params = cs[1].getAll();
return ['LabCS', params];
default:
error('unimplemented color space object "' + mode + '"');
}
} else {
error('unrecognized color space object: "' + cs + '"');
}
return null;
};
/**
* Checks if a decode map matches the default decode map for a color space.
* This handles the general decode maps where there are two values per
* component. e.g. [0, 1, 0, 1, 0, 1] for a RGB color.
* This does not handle Lab, Indexed, or Pattern decode maps since they are
* slightly different.
* @param {Array} decode Decode map (usually from an image).
* @param {Number} n Number of components the color space has.
*/
ColorSpace.isDefaultDecode = function ColorSpace_isDefaultDecode(decode, n) {
if (!decode)
return true;
if (n * 2 !== decode.length) {
warn('The decode map is not the correct length');
return true;
}
for (var i = 0, ii = decode.length; i < ii; i += 2) {
if (decode[i] !== 0 || decode[i + 1] != 1)
return false;
}
return true;
};
ColorSpace.singletons = {
get gray() {
return shadow(this, 'gray', new DeviceGrayCS());
},
get rgb() {
return shadow(this, 'rgb', new DeviceRgbCS());
},
get cmyk() {
return shadow(this, 'cmyk', new DeviceCmykCS());
}
};
return ColorSpace;
})();
/**
* Alternate color space handles both Separation and DeviceN color spaces. A
* Separation color space is actually just a DeviceN with one color component.
* Both color spaces use a tinting function to convert colors to a base color
* space.
*/
var AlternateCS = (function AlternateCSClosure() {
function AlternateCS(numComps, base, tintFn) {
this.name = 'Alternate';
this.numComps = numComps;
this.defaultColor = new Float32Array(numComps);
for (var i = 0; i < numComps; ++i) {
this.defaultColor[i] = 1;
}
this.base = base;
this.tintFn = tintFn;
}
AlternateCS.prototype = {
getRgb: function AlternateCS_getRgb(src, srcOffset) {
var rgb = new Uint8Array(3);
this.getRgbItem(src, srcOffset, rgb, 0);
return rgb;
},
getRgbItem: function AlternateCS_getRgbItem(src, srcOffset,
dest, destOffset) {
var baseNumComps = this.base.numComps;
var input = 'subarray' in src ?
src.subarray(srcOffset, srcOffset + this.numComps) :
Array.prototype.slice.call(src, srcOffset, srcOffset + this.numComps);
var tinted = this.tintFn(input);
this.base.getRgbItem(tinted, 0, dest, destOffset);
},
getRgbBuffer: function AlternateCS_getRgbBuffer(src, srcOffset, count,
dest, destOffset, bits) {
var tintFn = this.tintFn;
var base = this.base;
var scale = 1 / ((1 << bits) - 1);
var baseNumComps = base.numComps;
var usesZeroToOneRange = base.usesZeroToOneRange;
var isPassthrough = base.isPassthrough(8) || !usesZeroToOneRange;
var pos = isPassthrough ? destOffset : 0;
var baseBuf = isPassthrough ? dest : new Uint8Array(baseNumComps * count);
var numComps = this.numComps;
var scaled = new Float32Array(numComps);
for (var i = 0; i < count; i++) {
for (var j = 0; j < numComps; j++) {
scaled[j] = src[srcOffset++] * scale;
}
var tinted = tintFn(scaled);
if (usesZeroToOneRange) {
for (var j = 0; j < baseNumComps; j++) {
baseBuf[pos++] = tinted[j] * 255;
}
} else {
base.getRgbItem(tinted, 0, baseBuf, pos);
pos += baseNumComps;
}
}
if (!isPassthrough) {
base.getRgbBuffer(baseBuf, 0, count, dest, destOffset, 8);
}
},
getOutputLength: function AlternateCS_getOutputLength(inputLength) {
return this.base.getOutputLength(inputLength *
this.base.numComps / this.numComps);
},
isPassthrough: ColorSpace.prototype.isPassthrough,
createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
isDefaultDecode: function AlternateCS_isDefaultDecode(decodeMap) {
return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
},
usesZeroToOneRange: true
};
return AlternateCS;
})();
var PatternCS = (function PatternCSClosure() {
function PatternCS(baseCS) {
this.name = 'Pattern';
this.base = baseCS;
}
PatternCS.prototype = {};
return PatternCS;
})();
var IndexedCS = (function IndexedCSClosure() {
function IndexedCS(base, highVal, lookup) {
this.name = 'Indexed';
this.numComps = 1;
this.defaultColor = new Uint8Array([0]);
this.base = base;
this.highVal = highVal;
var baseNumComps = base.numComps;
var length = baseNumComps * highVal;
var lookupArray;
if (isStream(lookup)) {
lookupArray = new Uint8Array(length);
var bytes = lookup.getBytes(length);
lookupArray.set(bytes);
} else if (isString(lookup)) {
lookupArray = new Uint8Array(length);
for (var i = 0; i < length; ++i)
lookupArray[i] = lookup.charCodeAt(i);
} else if (lookup instanceof Uint8Array || lookup instanceof Array) {
lookupArray = lookup;
} else {
error('Unrecognized lookup table: ' + lookup);
}
this.lookup = lookupArray;
}
IndexedCS.prototype = {
getRgb: function IndexedCS_getRgb(src, srcOffset) {
var numComps = this.base.numComps;
var start = src[srcOffset] * numComps;
return this.base.getRgb(this.lookup, start);
},
getRgbItem: function IndexedCS_getRgbItem(src, srcOffset,
dest, destOffset) {
var numComps = this.base.numComps;
var start = src[srcOffset] * numComps;
this.base.getRgbItem(this.lookup, start, dest, destOffset);
},
getRgbBuffer: function IndexedCS_getRgbBuffer(src, srcOffset, count,
dest, destOffset) {
var base = this.base;
var numComps = base.numComps;
var outputDelta = base.getOutputLength(numComps);
var lookup = this.lookup;
for (var i = 0; i < count; ++i) {
var lookupPos = src[srcOffset++] * numComps;
base.getRgbBuffer(lookup, lookupPos, 1, dest, destOffset, 8);
destOffset += outputDelta;
}
},
getOutputLength: function IndexedCS_getOutputLength(inputLength) {
return this.base.getOutputLength(inputLength * this.base.numComps);
},
isPassthrough: ColorSpace.prototype.isPassthrough,
create