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8016 lines
234 KiB
8016 lines
234 KiB
/**
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* @licstart The following is the entire license notice for the
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* Javascript code in this page
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*
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* Copyright 2020 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @licend The above is the entire license notice for the
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* Javascript code in this page
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*/
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(function webpackUniversalModuleDefinition(root, factory) {
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if(typeof exports === 'object' && typeof module === 'object')
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module.exports = factory();
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else if(typeof define === 'function' && define.amd)
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define("pdfjs-dist/image_decoders/pdf.image_decoders", [], factory);
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else if(typeof exports === 'object')
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exports["pdfjs-dist/image_decoders/pdf.image_decoders"] = factory();
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else
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root["pdfjs-dist/image_decoders/pdf.image_decoders"] = root.pdfjsImageDecoders = factory();
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})(this, function() {
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return /******/ (function(modules) { // webpackBootstrap
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/******/ // The module cache
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/******/ var installedModules = {};
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/******/
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/******/ // The require function
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/******/ function __w_pdfjs_require__(moduleId) {
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/******/
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/******/ // Check if module is in cache
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/******/ if(installedModules[moduleId]) {
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/******/ return installedModules[moduleId].exports;
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/******/ }
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/******/ // Create a new module (and put it into the cache)
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/******/ var module = installedModules[moduleId] = {
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/******/ i: moduleId,
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/******/ l: false,
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/******/ exports: {}
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/******/ };
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/******/
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/******/ // Execute the module function
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/******/ modules[moduleId].call(module.exports, module, module.exports, __w_pdfjs_require__);
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/******/
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/******/ // Flag the module as loaded
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/******/ module.l = true;
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/******/
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/******/ // Return the exports of the module
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/******/ return module.exports;
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/******/ }
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/******/
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/******/
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/******/ // expose the modules object (__webpack_modules__)
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/******/ __w_pdfjs_require__.m = modules;
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/******/
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/******/ // expose the module cache
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/******/ __w_pdfjs_require__.c = installedModules;
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/******/
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/******/ // define getter function for harmony exports
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/******/ __w_pdfjs_require__.d = function(exports, name, getter) {
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/******/ if(!__w_pdfjs_require__.o(exports, name)) {
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/******/ Object.defineProperty(exports, name, { enumerable: true, get: getter });
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/******/ }
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/******/ };
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/******/
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/******/ // define __esModule on exports
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/******/ __w_pdfjs_require__.r = function(exports) {
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/******/ if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
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/******/ Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
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/******/ }
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/******/ Object.defineProperty(exports, '__esModule', { value: true });
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/******/ };
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/******/
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/******/ // create a fake namespace object
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/******/ // mode & 1: value is a module id, require it
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/******/ // mode & 2: merge all properties of value into the ns
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/******/ // mode & 4: return value when already ns object
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/******/ // mode & 8|1: behave like require
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/******/ __w_pdfjs_require__.t = function(value, mode) {
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/******/ if(mode & 1) value = __w_pdfjs_require__(value);
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/******/ if(mode & 8) return value;
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/******/ if((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;
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/******/ var ns = Object.create(null);
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/******/ __w_pdfjs_require__.r(ns);
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/******/ Object.defineProperty(ns, 'default', { enumerable: true, value: value });
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/******/ if(mode & 2 && typeof value != 'string') for(var key in value) __w_pdfjs_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));
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/******/ return ns;
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/******/ };
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/******/
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/******/ // getDefaultExport function for compatibility with non-harmony modules
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/******/ __w_pdfjs_require__.n = function(module) {
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/******/ var getter = module && module.__esModule ?
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/******/ function getDefault() { return module['default']; } :
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/******/ function getModuleExports() { return module; };
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/******/ __w_pdfjs_require__.d(getter, 'a', getter);
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/******/ return getter;
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/******/ };
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/******/
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/******/ // Object.prototype.hasOwnProperty.call
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/******/ __w_pdfjs_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
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/******/
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/******/ // __webpack_public_path__
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/******/ __w_pdfjs_require__.p = "";
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/******/
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/******/
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/******/ // Load entry module and return exports
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/******/ return __w_pdfjs_require__(__w_pdfjs_require__.s = 0);
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/******/ })
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/************************************************************************/
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/******/ ([
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/* 0 */
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/***/ (function(module, exports, __w_pdfjs_require__) {
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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Object.defineProperty(exports, "getVerbosityLevel", {
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enumerable: true,
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get: function () {
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return _util.getVerbosityLevel;
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}
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});
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Object.defineProperty(exports, "setVerbosityLevel", {
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enumerable: true,
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get: function () {
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return _util.setVerbosityLevel;
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}
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});
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Object.defineProperty(exports, "Jbig2mage", {
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enumerable: true,
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get: function () {
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return _jbig.Jbig2mage;
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}
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});
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Object.defineProperty(exports, "JpegImage", {
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enumerable: true,
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get: function () {
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return _jpg.JpegImage;
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}
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});
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Object.defineProperty(exports, "JpxImage", {
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enumerable: true,
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get: function () {
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return _jpx.JpxImage;
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}
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});
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var _util = __w_pdfjs_require__(1);
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var _jbig = __w_pdfjs_require__(4);
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var _jpg = __w_pdfjs_require__(8);
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var _jpx = __w_pdfjs_require__(9);
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const pdfjsVersion = '2.6.347';
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const pdfjsBuild = '3be9c65f';
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/***/ }),
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/* 1 */
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/***/ (function(module, exports, __w_pdfjs_require__) {
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.arrayByteLength = arrayByteLength;
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exports.arraysToBytes = arraysToBytes;
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exports.assert = assert;
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exports.bytesToString = bytesToString;
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exports.createPromiseCapability = createPromiseCapability;
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exports.escapeString = escapeString;
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exports.getModificationDate = getModificationDate;
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exports.getVerbosityLevel = getVerbosityLevel;
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exports.info = info;
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exports.isArrayBuffer = isArrayBuffer;
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exports.isArrayEqual = isArrayEqual;
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exports.isBool = isBool;
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exports.isNum = isNum;
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exports.isString = isString;
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exports.isSameOrigin = isSameOrigin;
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exports.createValidAbsoluteUrl = createValidAbsoluteUrl;
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exports.removeNullCharacters = removeNullCharacters;
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exports.setVerbosityLevel = setVerbosityLevel;
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exports.shadow = shadow;
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exports.string32 = string32;
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exports.stringToBytes = stringToBytes;
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exports.stringToPDFString = stringToPDFString;
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exports.stringToUTF8String = stringToUTF8String;
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exports.utf8StringToString = utf8StringToString;
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exports.warn = warn;
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exports.unreachable = unreachable;
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exports.IsEvalSupportedCached = exports.IsLittleEndianCached = exports.createObjectURL = exports.FormatError = exports.Util = exports.UnknownErrorException = exports.UnexpectedResponseException = exports.TextRenderingMode = exports.StreamType = exports.PermissionFlag = exports.PasswordResponses = exports.PasswordException = exports.MissingPDFException = exports.InvalidPDFException = exports.AbortException = exports.CMapCompressionType = exports.ImageKind = exports.FontType = exports.AnnotationType = exports.AnnotationStateModelType = exports.AnnotationReviewState = exports.AnnotationReplyType = exports.AnnotationMarkedState = exports.AnnotationFlag = exports.AnnotationFieldFlag = exports.AnnotationBorderStyleType = exports.UNSUPPORTED_FEATURES = exports.VerbosityLevel = exports.OPS = exports.IDENTITY_MATRIX = exports.FONT_IDENTITY_MATRIX = exports.BaseException = void 0;
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__w_pdfjs_require__(2);
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const IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];
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exports.IDENTITY_MATRIX = IDENTITY_MATRIX;
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const FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0];
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exports.FONT_IDENTITY_MATRIX = FONT_IDENTITY_MATRIX;
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const PermissionFlag = {
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PRINT: 0x04,
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MODIFY_CONTENTS: 0x08,
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COPY: 0x10,
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MODIFY_ANNOTATIONS: 0x20,
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FILL_INTERACTIVE_FORMS: 0x100,
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COPY_FOR_ACCESSIBILITY: 0x200,
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ASSEMBLE: 0x400,
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PRINT_HIGH_QUALITY: 0x800
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};
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exports.PermissionFlag = PermissionFlag;
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const TextRenderingMode = {
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FILL: 0,
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STROKE: 1,
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FILL_STROKE: 2,
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INVISIBLE: 3,
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FILL_ADD_TO_PATH: 4,
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STROKE_ADD_TO_PATH: 5,
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FILL_STROKE_ADD_TO_PATH: 6,
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ADD_TO_PATH: 7,
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FILL_STROKE_MASK: 3,
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ADD_TO_PATH_FLAG: 4
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};
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exports.TextRenderingMode = TextRenderingMode;
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const ImageKind = {
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GRAYSCALE_1BPP: 1,
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RGB_24BPP: 2,
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RGBA_32BPP: 3
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};
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exports.ImageKind = ImageKind;
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const AnnotationType = {
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TEXT: 1,
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LINK: 2,
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FREETEXT: 3,
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LINE: 4,
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SQUARE: 5,
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CIRCLE: 6,
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POLYGON: 7,
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POLYLINE: 8,
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HIGHLIGHT: 9,
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UNDERLINE: 10,
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SQUIGGLY: 11,
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STRIKEOUT: 12,
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STAMP: 13,
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CARET: 14,
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INK: 15,
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POPUP: 16,
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FILEATTACHMENT: 17,
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SOUND: 18,
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MOVIE: 19,
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WIDGET: 20,
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SCREEN: 21,
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PRINTERMARK: 22,
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TRAPNET: 23,
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WATERMARK: 24,
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THREED: 25,
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REDACT: 26
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};
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exports.AnnotationType = AnnotationType;
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const AnnotationStateModelType = {
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MARKED: "Marked",
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REVIEW: "Review"
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};
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exports.AnnotationStateModelType = AnnotationStateModelType;
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const AnnotationMarkedState = {
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MARKED: "Marked",
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UNMARKED: "Unmarked"
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};
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exports.AnnotationMarkedState = AnnotationMarkedState;
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const AnnotationReviewState = {
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ACCEPTED: "Accepted",
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REJECTED: "Rejected",
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CANCELLED: "Cancelled",
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COMPLETED: "Completed",
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NONE: "None"
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};
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exports.AnnotationReviewState = AnnotationReviewState;
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const AnnotationReplyType = {
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GROUP: "Group",
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REPLY: "R"
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};
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exports.AnnotationReplyType = AnnotationReplyType;
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const AnnotationFlag = {
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INVISIBLE: 0x01,
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HIDDEN: 0x02,
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PRINT: 0x04,
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NOZOOM: 0x08,
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NOROTATE: 0x10,
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NOVIEW: 0x20,
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READONLY: 0x40,
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LOCKED: 0x80,
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TOGGLENOVIEW: 0x100,
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LOCKEDCONTENTS: 0x200
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};
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exports.AnnotationFlag = AnnotationFlag;
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const AnnotationFieldFlag = {
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READONLY: 0x0000001,
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REQUIRED: 0x0000002,
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NOEXPORT: 0x0000004,
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MULTILINE: 0x0001000,
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PASSWORD: 0x0002000,
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NOTOGGLETOOFF: 0x0004000,
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RADIO: 0x0008000,
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PUSHBUTTON: 0x0010000,
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COMBO: 0x0020000,
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EDIT: 0x0040000,
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SORT: 0x0080000,
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FILESELECT: 0x0100000,
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MULTISELECT: 0x0200000,
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DONOTSPELLCHECK: 0x0400000,
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DONOTSCROLL: 0x0800000,
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COMB: 0x1000000,
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RICHTEXT: 0x2000000,
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RADIOSINUNISON: 0x2000000,
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COMMITONSELCHANGE: 0x4000000
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};
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exports.AnnotationFieldFlag = AnnotationFieldFlag;
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const AnnotationBorderStyleType = {
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SOLID: 1,
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DASHED: 2,
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BEVELED: 3,
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INSET: 4,
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UNDERLINE: 5
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};
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exports.AnnotationBorderStyleType = AnnotationBorderStyleType;
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const StreamType = {
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UNKNOWN: "UNKNOWN",
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FLATE: "FLATE",
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LZW: "LZW",
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DCT: "DCT",
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JPX: "JPX",
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JBIG: "JBIG",
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A85: "A85",
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AHX: "AHX",
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CCF: "CCF",
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RLX: "RLX"
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};
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exports.StreamType = StreamType;
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const FontType = {
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UNKNOWN: "UNKNOWN",
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TYPE1: "TYPE1",
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TYPE1C: "TYPE1C",
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CIDFONTTYPE0: "CIDFONTTYPE0",
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CIDFONTTYPE0C: "CIDFONTTYPE0C",
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TRUETYPE: "TRUETYPE",
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CIDFONTTYPE2: "CIDFONTTYPE2",
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TYPE3: "TYPE3",
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OPENTYPE: "OPENTYPE",
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TYPE0: "TYPE0",
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MMTYPE1: "MMTYPE1"
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};
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exports.FontType = FontType;
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const VerbosityLevel = {
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ERRORS: 0,
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WARNINGS: 1,
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INFOS: 5
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};
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exports.VerbosityLevel = VerbosityLevel;
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const CMapCompressionType = {
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NONE: 0,
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BINARY: 1,
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STREAM: 2
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};
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exports.CMapCompressionType = CMapCompressionType;
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const OPS = {
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dependency: 1,
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setLineWidth: 2,
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setLineCap: 3,
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setLineJoin: 4,
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setMiterLimit: 5,
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setDash: 6,
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setRenderingIntent: 7,
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setFlatness: 8,
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setGState: 9,
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save: 10,
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restore: 11,
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transform: 12,
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moveTo: 13,
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lineTo: 14,
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curveTo: 15,
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curveTo2: 16,
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curveTo3: 17,
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closePath: 18,
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rectangle: 19,
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stroke: 20,
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|
closeStroke: 21,
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|
fill: 22,
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|
eoFill: 23,
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|
fillStroke: 24,
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|
eoFillStroke: 25,
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|
closeFillStroke: 26,
|
|
closeEOFillStroke: 27,
|
|
endPath: 28,
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|
clip: 29,
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|
eoClip: 30,
|
|
beginText: 31,
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|
endText: 32,
|
|
setCharSpacing: 33,
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|
setWordSpacing: 34,
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|
setHScale: 35,
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|
setLeading: 36,
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|
setFont: 37,
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|
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,
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|
paintInlineImageXObject: 86,
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|
paintInlineImageXObjectGroup: 87,
|
|
paintImageXObjectRepeat: 88,
|
|
paintImageMaskXObjectRepeat: 89,
|
|
paintSolidColorImageMask: 90,
|
|
constructPath: 91
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|
};
|
|
exports.OPS = OPS;
|
|
const UNSUPPORTED_FEATURES = {
|
|
unknown: "unknown",
|
|
forms: "forms",
|
|
javaScript: "javaScript",
|
|
smask: "smask",
|
|
shadingPattern: "shadingPattern",
|
|
font: "font",
|
|
errorTilingPattern: "errorTilingPattern",
|
|
errorExtGState: "errorExtGState",
|
|
errorXObject: "errorXObject",
|
|
errorFontLoadType3: "errorFontLoadType3",
|
|
errorFontState: "errorFontState",
|
|
errorFontMissing: "errorFontMissing",
|
|
errorFontTranslate: "errorFontTranslate",
|
|
errorColorSpace: "errorColorSpace",
|
|
errorOperatorList: "errorOperatorList",
|
|
errorFontToUnicode: "errorFontToUnicode",
|
|
errorFontLoadNative: "errorFontLoadNative",
|
|
errorFontGetPath: "errorFontGetPath",
|
|
errorMarkedContent: "errorMarkedContent"
|
|
};
|
|
exports.UNSUPPORTED_FEATURES = UNSUPPORTED_FEATURES;
|
|
const PasswordResponses = {
|
|
NEED_PASSWORD: 1,
|
|
INCORRECT_PASSWORD: 2
|
|
};
|
|
exports.PasswordResponses = PasswordResponses;
|
|
let verbosity = VerbosityLevel.WARNINGS;
|
|
|
|
function setVerbosityLevel(level) {
|
|
if (Number.isInteger(level)) {
|
|
verbosity = level;
|
|
}
|
|
}
|
|
|
|
function getVerbosityLevel() {
|
|
return verbosity;
|
|
}
|
|
|
|
function info(msg) {
|
|
if (verbosity >= VerbosityLevel.INFOS) {
|
|
console.log(`Info: ${msg}`);
|
|
}
|
|
}
|
|
|
|
function warn(msg) {
|
|
if (verbosity >= VerbosityLevel.WARNINGS) {
|
|
console.log(`Warning: ${msg}`);
|
|
}
|
|
}
|
|
|
|
function unreachable(msg) {
|
|
throw new Error(msg);
|
|
}
|
|
|
|
function assert(cond, msg) {
|
|
if (!cond) {
|
|
unreachable(msg);
|
|
}
|
|
}
|
|
|
|
function isSameOrigin(baseUrl, otherUrl) {
|
|
let base;
|
|
|
|
try {
|
|
base = new URL(baseUrl);
|
|
|
|
if (!base.origin || base.origin === "null") {
|
|
return false;
|
|
}
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
|
|
const other = new URL(otherUrl, base);
|
|
return base.origin === other.origin;
|
|
}
|
|
|
|
function _isValidProtocol(url) {
|
|
if (!url) {
|
|
return false;
|
|
}
|
|
|
|
switch (url.protocol) {
|
|
case "http:":
|
|
case "https:":
|
|
case "ftp:":
|
|
case "mailto:":
|
|
case "tel:":
|
|
return true;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
function createValidAbsoluteUrl(url, baseUrl) {
|
|
if (!url) {
|
|
return null;
|
|
}
|
|
|
|
try {
|
|
const absoluteUrl = baseUrl ? new URL(url, baseUrl) : new URL(url);
|
|
|
|
if (_isValidProtocol(absoluteUrl)) {
|
|
return absoluteUrl;
|
|
}
|
|
} catch (ex) {}
|
|
|
|
return null;
|
|
}
|
|
|
|
function shadow(obj, prop, value) {
|
|
Object.defineProperty(obj, prop, {
|
|
value,
|
|
enumerable: true,
|
|
configurable: true,
|
|
writable: false
|
|
});
|
|
return value;
|
|
}
|
|
|
|
const BaseException = function BaseExceptionClosure() {
|
|
function BaseException(message) {
|
|
if (this.constructor === BaseException) {
|
|
unreachable("Cannot initialize BaseException.");
|
|
}
|
|
|
|
this.message = message;
|
|
this.name = this.constructor.name;
|
|
}
|
|
|
|
BaseException.prototype = new Error();
|
|
BaseException.constructor = BaseException;
|
|
return BaseException;
|
|
}();
|
|
|
|
exports.BaseException = BaseException;
|
|
|
|
class PasswordException extends BaseException {
|
|
constructor(msg, code) {
|
|
super(msg);
|
|
this.code = code;
|
|
}
|
|
|
|
}
|
|
|
|
exports.PasswordException = PasswordException;
|
|
|
|
class UnknownErrorException extends BaseException {
|
|
constructor(msg, details) {
|
|
super(msg);
|
|
this.details = details;
|
|
}
|
|
|
|
}
|
|
|
|
exports.UnknownErrorException = UnknownErrorException;
|
|
|
|
class InvalidPDFException extends BaseException {}
|
|
|
|
exports.InvalidPDFException = InvalidPDFException;
|
|
|
|
class MissingPDFException extends BaseException {}
|
|
|
|
exports.MissingPDFException = MissingPDFException;
|
|
|
|
class UnexpectedResponseException extends BaseException {
|
|
constructor(msg, status) {
|
|
super(msg);
|
|
this.status = status;
|
|
}
|
|
|
|
}
|
|
|
|
exports.UnexpectedResponseException = UnexpectedResponseException;
|
|
|
|
class FormatError extends BaseException {}
|
|
|
|
exports.FormatError = FormatError;
|
|
|
|
class AbortException extends BaseException {}
|
|
|
|
exports.AbortException = AbortException;
|
|
const NullCharactersRegExp = /\x00/g;
|
|
|
|
function removeNullCharacters(str) {
|
|
if (typeof str !== "string") {
|
|
warn("The argument for removeNullCharacters must be a string.");
|
|
return str;
|
|
}
|
|
|
|
return str.replace(NullCharactersRegExp, "");
|
|
}
|
|
|
|
function bytesToString(bytes) {
|
|
assert(bytes !== null && typeof bytes === "object" && bytes.length !== undefined, "Invalid argument for bytesToString");
|
|
const length = bytes.length;
|
|
const MAX_ARGUMENT_COUNT = 8192;
|
|
|
|
if (length < MAX_ARGUMENT_COUNT) {
|
|
return String.fromCharCode.apply(null, bytes);
|
|
}
|
|
|
|
const strBuf = [];
|
|
|
|
for (let i = 0; i < length; i += MAX_ARGUMENT_COUNT) {
|
|
const chunkEnd = Math.min(i + MAX_ARGUMENT_COUNT, length);
|
|
const chunk = bytes.subarray(i, chunkEnd);
|
|
strBuf.push(String.fromCharCode.apply(null, chunk));
|
|
}
|
|
|
|
return strBuf.join("");
|
|
}
|
|
|
|
function stringToBytes(str) {
|
|
assert(typeof str === "string", "Invalid argument for stringToBytes");
|
|
const length = str.length;
|
|
const bytes = new Uint8Array(length);
|
|
|
|
for (let i = 0; i < length; ++i) {
|
|
bytes[i] = str.charCodeAt(i) & 0xff;
|
|
}
|
|
|
|
return bytes;
|
|
}
|
|
|
|
function arrayByteLength(arr) {
|
|
if (arr.length !== undefined) {
|
|
return arr.length;
|
|
}
|
|
|
|
assert(arr.byteLength !== undefined, "arrayByteLength - invalid argument.");
|
|
return arr.byteLength;
|
|
}
|
|
|
|
function arraysToBytes(arr) {
|
|
const length = arr.length;
|
|
|
|
if (length === 1 && arr[0] instanceof Uint8Array) {
|
|
return arr[0];
|
|
}
|
|
|
|
let resultLength = 0;
|
|
|
|
for (let i = 0; i < length; i++) {
|
|
resultLength += arrayByteLength(arr[i]);
|
|
}
|
|
|
|
let pos = 0;
|
|
const data = new Uint8Array(resultLength);
|
|
|
|
for (let i = 0; i < length; i++) {
|
|
let item = arr[i];
|
|
|
|
if (!(item instanceof Uint8Array)) {
|
|
if (typeof item === "string") {
|
|
item = stringToBytes(item);
|
|
} else {
|
|
item = new Uint8Array(item);
|
|
}
|
|
}
|
|
|
|
const itemLength = item.byteLength;
|
|
data.set(item, pos);
|
|
pos += itemLength;
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
function string32(value) {
|
|
return String.fromCharCode(value >> 24 & 0xff, value >> 16 & 0xff, value >> 8 & 0xff, value & 0xff);
|
|
}
|
|
|
|
function isLittleEndian() {
|
|
const buffer8 = new Uint8Array(4);
|
|
buffer8[0] = 1;
|
|
const view32 = new Uint32Array(buffer8.buffer, 0, 1);
|
|
return view32[0] === 1;
|
|
}
|
|
|
|
const IsLittleEndianCached = {
|
|
get value() {
|
|
return shadow(this, "value", isLittleEndian());
|
|
}
|
|
|
|
};
|
|
exports.IsLittleEndianCached = IsLittleEndianCached;
|
|
|
|
function isEvalSupported() {
|
|
try {
|
|
new Function("");
|
|
return true;
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
const IsEvalSupportedCached = {
|
|
get value() {
|
|
return shadow(this, "value", isEvalSupported());
|
|
}
|
|
|
|
};
|
|
exports.IsEvalSupportedCached = IsEvalSupportedCached;
|
|
const rgbBuf = ["rgb(", 0, ",", 0, ",", 0, ")"];
|
|
|
|
class Util {
|
|
static makeCssRgb(r, g, b) {
|
|
rgbBuf[1] = r;
|
|
rgbBuf[3] = g;
|
|
rgbBuf[5] = b;
|
|
return rgbBuf.join("");
|
|
}
|
|
|
|
static 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]];
|
|
}
|
|
|
|
static applyTransform(p, m) {
|
|
const xt = p[0] * m[0] + p[1] * m[2] + m[4];
|
|
const yt = p[0] * m[1] + p[1] * m[3] + m[5];
|
|
return [xt, yt];
|
|
}
|
|
|
|
static applyInverseTransform(p, m) {
|
|
const d = m[0] * m[3] - m[1] * m[2];
|
|
const xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;
|
|
const yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;
|
|
return [xt, yt];
|
|
}
|
|
|
|
static getAxialAlignedBoundingBox(r, m) {
|
|
const p1 = Util.applyTransform(r, m);
|
|
const p2 = Util.applyTransform(r.slice(2, 4), m);
|
|
const p3 = Util.applyTransform([r[0], r[3]], m);
|
|
const 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])];
|
|
}
|
|
|
|
static inverseTransform(m) {
|
|
const 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];
|
|
}
|
|
|
|
static 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]];
|
|
}
|
|
|
|
static singularValueDecompose2dScale(m) {
|
|
const transpose = [m[0], m[2], m[1], m[3]];
|
|
const a = m[0] * transpose[0] + m[1] * transpose[2];
|
|
const b = m[0] * transpose[1] + m[1] * transpose[3];
|
|
const c = m[2] * transpose[0] + m[3] * transpose[2];
|
|
const d = m[2] * transpose[1] + m[3] * transpose[3];
|
|
const first = (a + d) / 2;
|
|
const second = Math.sqrt((a + d) * (a + d) - 4 * (a * d - c * b)) / 2;
|
|
const sx = first + second || 1;
|
|
const sy = first - second || 1;
|
|
return [Math.sqrt(sx), Math.sqrt(sy)];
|
|
}
|
|
|
|
static normalizeRect(rect) {
|
|
const r = rect.slice(0);
|
|
|
|
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;
|
|
}
|
|
|
|
static intersect(rect1, rect2) {
|
|
function compare(a, b) {
|
|
return a - b;
|
|
}
|
|
|
|
const orderedX = [rect1[0], rect1[2], rect2[0], rect2[2]].sort(compare);
|
|
const orderedY = [rect1[1], rect1[3], rect2[1], rect2[3]].sort(compare);
|
|
const result = [];
|
|
rect1 = Util.normalizeRect(rect1);
|
|
rect2 = Util.normalizeRect(rect2);
|
|
|
|
if (orderedX[0] === rect1[0] && orderedX[1] === rect2[0] || orderedX[0] === rect2[0] && orderedX[1] === rect1[0]) {
|
|
result[0] = orderedX[1];
|
|
result[2] = orderedX[2];
|
|
} else {
|
|
return null;
|
|
}
|
|
|
|
if (orderedY[0] === rect1[1] && orderedY[1] === rect2[1] || orderedY[0] === rect2[1] && orderedY[1] === rect1[1]) {
|
|
result[1] = orderedY[1];
|
|
result[3] = orderedY[2];
|
|
} else {
|
|
return null;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
}
|
|
|
|
exports.Util = Util;
|
|
const 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) {
|
|
const length = str.length,
|
|
strBuf = [];
|
|
|
|
if (str[0] === "\xFE" && str[1] === "\xFF") {
|
|
for (let i = 2; i < length; i += 2) {
|
|
strBuf.push(String.fromCharCode(str.charCodeAt(i) << 8 | str.charCodeAt(i + 1)));
|
|
}
|
|
} else if (str[0] === "\xFF" && str[1] === "\xFE") {
|
|
for (let i = 2; i < length; i += 2) {
|
|
strBuf.push(String.fromCharCode(str.charCodeAt(i + 1) << 8 | str.charCodeAt(i)));
|
|
}
|
|
} else {
|
|
for (let i = 0; i < length; ++i) {
|
|
const code = PDFStringTranslateTable[str.charCodeAt(i)];
|
|
strBuf.push(code ? String.fromCharCode(code) : str.charAt(i));
|
|
}
|
|
}
|
|
|
|
return strBuf.join("");
|
|
}
|
|
|
|
function escapeString(str) {
|
|
return str.replace(/([\(\)\\])/g, "\\$1");
|
|
}
|
|
|
|
function stringToUTF8String(str) {
|
|
return decodeURIComponent(escape(str));
|
|
}
|
|
|
|
function utf8StringToString(str) {
|
|
return unescape(encodeURIComponent(str));
|
|
}
|
|
|
|
function isBool(v) {
|
|
return typeof v === "boolean";
|
|
}
|
|
|
|
function isNum(v) {
|
|
return typeof v === "number";
|
|
}
|
|
|
|
function isString(v) {
|
|
return typeof v === "string";
|
|
}
|
|
|
|
function isArrayBuffer(v) {
|
|
return typeof v === "object" && v !== null && v.byteLength !== undefined;
|
|
}
|
|
|
|
function isArrayEqual(arr1, arr2) {
|
|
if (arr1.length !== arr2.length) {
|
|
return false;
|
|
}
|
|
|
|
return arr1.every(function (element, index) {
|
|
return element === arr2[index];
|
|
});
|
|
}
|
|
|
|
function getModificationDate(date = new Date(Date.now())) {
|
|
const buffer = [date.getUTCFullYear().toString(), (date.getUTCMonth() + 1).toString().padStart(2, "0"), (date.getUTCDate() + 1).toString().padStart(2, "0"), date.getUTCHours().toString().padStart(2, "0"), date.getUTCMinutes().toString().padStart(2, "0"), date.getUTCSeconds().toString().padStart(2, "0")];
|
|
return buffer.join("");
|
|
}
|
|
|
|
function createPromiseCapability() {
|
|
const capability = Object.create(null);
|
|
let isSettled = false;
|
|
Object.defineProperty(capability, "settled", {
|
|
get() {
|
|
return isSettled;
|
|
}
|
|
|
|
});
|
|
capability.promise = new Promise(function (resolve, reject) {
|
|
capability.resolve = function (data) {
|
|
isSettled = true;
|
|
resolve(data);
|
|
};
|
|
|
|
capability.reject = function (reason) {
|
|
isSettled = true;
|
|
reject(reason);
|
|
};
|
|
});
|
|
return capability;
|
|
}
|
|
|
|
const createObjectURL = function createObjectURLClosure() {
|
|
const digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
|
|
return function createObjectURL(data, contentType, forceDataSchema = false) {
|
|
if (!forceDataSchema && URL.createObjectURL) {
|
|
const blob = new Blob([data], {
|
|
type: contentType
|
|
});
|
|
return URL.createObjectURL(blob);
|
|
}
|
|
|
|
let buffer = `data:${contentType};base64,`;
|
|
|
|
for (let i = 0, ii = data.length; i < ii; i += 3) {
|
|
const b1 = data[i] & 0xff;
|
|
const b2 = data[i + 1] & 0xff;
|
|
const b3 = data[i + 2] & 0xff;
|
|
const d1 = b1 >> 2,
|
|
d2 = (b1 & 3) << 4 | b2 >> 4;
|
|
const d3 = i + 1 < ii ? (b2 & 0xf) << 2 | b3 >> 6 : 64;
|
|
const d4 = i + 2 < ii ? b3 & 0x3f : 64;
|
|
buffer += digits[d1] + digits[d2] + digits[d3] + digits[d4];
|
|
}
|
|
|
|
return buffer;
|
|
};
|
|
}();
|
|
|
|
exports.createObjectURL = createObjectURL;
|
|
|
|
/***/ }),
|
|
/* 2 */
|
|
/***/ (function(module, exports, __w_pdfjs_require__) {
|
|
|
|
"use strict";
|
|
|
|
|
|
var _is_node = __w_pdfjs_require__(3);
|
|
|
|
;
|
|
|
|
/***/ }),
|
|
/* 3 */
|
|
/***/ (function(module, exports, __w_pdfjs_require__) {
|
|
|
|
"use strict";
|
|
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.isNodeJS = void 0;
|
|
const isNodeJS = typeof process === "object" && process + "" === "[object process]" && !process.versions.nw && !(process.versions.electron && process.type && process.type !== "browser");
|
|
exports.isNodeJS = isNodeJS;
|
|
|
|
/***/ }),
|
|
/* 4 */
|
|
/***/ (function(module, exports, __w_pdfjs_require__) {
|
|
|
|
"use strict";
|
|
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.Jbig2Image = void 0;
|
|
|
|
var _util = __w_pdfjs_require__(1);
|
|
|
|
var _core_utils = __w_pdfjs_require__(5);
|
|
|
|
var _arithmetic_decoder = __w_pdfjs_require__(6);
|
|
|
|
var _ccitt = __w_pdfjs_require__(7);
|
|
|
|
class Jbig2Error extends _util.BaseException {
|
|
constructor(msg) {
|
|
super(`JBIG2 error: ${msg}`);
|
|
}
|
|
|
|
}
|
|
|
|
var Jbig2Image = function Jbig2ImageClosure() {
|
|
function ContextCache() {}
|
|
|
|
ContextCache.prototype = {
|
|
getContexts(id) {
|
|
if (id in this) {
|
|
return this[id];
|
|
}
|
|
|
|
return this[id] = new Int8Array(1 << 16);
|
|
}
|
|
|
|
};
|
|
|
|
function DecodingContext(data, start, end) {
|
|
this.data = data;
|
|
this.start = start;
|
|
this.end = end;
|
|
}
|
|
|
|
DecodingContext.prototype = {
|
|
get decoder() {
|
|
var decoder = new _arithmetic_decoder.ArithmeticDecoder(this.data, this.start, this.end);
|
|
return (0, _util.shadow)(this, "decoder", decoder);
|
|
},
|
|
|
|
get contextCache() {
|
|
var cache = new ContextCache();
|
|
return (0, _util.shadow)(this, "contextCache", cache);
|
|
}
|
|
|
|
};
|
|
|
|
function decodeInteger(contextCache, procedure, decoder) {
|
|
var contexts = contextCache.getContexts(procedure);
|
|
var prev = 1;
|
|
|
|
function readBits(length) {
|
|
var v = 0;
|
|
|
|
for (var i = 0; i < length; i++) {
|
|
var bit = decoder.readBit(contexts, prev);
|
|
prev = prev < 256 ? prev << 1 | bit : (prev << 1 | bit) & 511 | 256;
|
|
v = v << 1 | bit;
|
|
}
|
|
|
|
return v >>> 0;
|
|
}
|
|
|
|
var sign = readBits(1);
|
|
var value = readBits(1) ? readBits(1) ? readBits(1) ? readBits(1) ? readBits(1) ? readBits(32) + 4436 : readBits(12) + 340 : readBits(8) + 84 : readBits(6) + 20 : readBits(4) + 4 : readBits(2);
|
|
|
|
if (sign === 0) {
|
|
return value;
|
|
} else if (value > 0) {
|
|
return -value;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
function decodeIAID(contextCache, decoder, codeLength) {
|
|
var contexts = contextCache.getContexts("IAID");
|
|
var prev = 1;
|
|
|
|
for (var i = 0; i < codeLength; i++) {
|
|
var bit = decoder.readBit(contexts, prev);
|
|
prev = prev << 1 | bit;
|
|
}
|
|
|
|
if (codeLength < 31) {
|
|
return prev & (1 << codeLength) - 1;
|
|
}
|
|
|
|
return prev & 0x7fffffff;
|
|
}
|
|
|
|
var SegmentTypes = ["SymbolDictionary", null, null, null, "IntermediateTextRegion", null, "ImmediateTextRegion", "ImmediateLosslessTextRegion", null, null, null, null, null, null, null, null, "PatternDictionary", null, null, null, "IntermediateHalftoneRegion", null, "ImmediateHalftoneRegion", "ImmediateLosslessHalftoneRegion", null, null, null, null, null, null, null, null, null, null, null, null, "IntermediateGenericRegion", null, "ImmediateGenericRegion", "ImmediateLosslessGenericRegion", "IntermediateGenericRefinementRegion", null, "ImmediateGenericRefinementRegion", "ImmediateLosslessGenericRefinementRegion", null, null, null, null, "PageInformation", "EndOfPage", "EndOfStripe", "EndOfFile", "Profiles", "Tables", null, null, null, null, null, null, null, null, "Extension"];
|
|
var CodingTemplates = [[{
|
|
x: -1,
|
|
y: -2
|
|
}, {
|
|
x: 0,
|
|
y: -2
|
|
}, {
|
|
x: 1,
|
|
y: -2
|
|
}, {
|
|
x: -2,
|
|
y: -1
|
|
}, {
|
|
x: -1,
|
|
y: -1
|
|
}, {
|
|
x: 0,
|
|
y: -1
|
|
}, {
|
|
x: 1,
|
|
y: -1
|
|
}, {
|
|
x: 2,
|
|
y: -1
|
|
}, {
|
|
x: -4,
|
|
y: 0
|
|
}, {
|
|
x: -3,
|
|
y: 0
|
|
}, {
|
|
x: -2,
|
|
y: 0
|
|
}, {
|
|
x: -1,
|
|
y: 0
|
|
}], [{
|
|
x: -1,
|
|
y: -2
|
|
}, {
|
|
x: 0,
|
|
y: -2
|
|
}, {
|
|
x: 1,
|
|
y: -2
|
|
}, {
|
|
x: 2,
|
|
y: -2
|
|
}, {
|
|
x: -2,
|
|
y: -1
|
|
}, {
|
|
x: -1,
|
|
y: -1
|
|
}, {
|
|
x: 0,
|
|
y: -1
|
|
}, {
|
|
x: 1,
|
|
y: -1
|
|
}, {
|
|
x: 2,
|
|
y: -1
|
|
}, {
|
|
x: -3,
|
|
y: 0
|
|
}, {
|
|
x: -2,
|
|
y: 0
|
|
}, {
|
|
x: -1,
|
|
y: 0
|
|
}], [{
|
|
x: -1,
|
|
y: -2
|
|
}, {
|
|
x: 0,
|
|
y: -2
|
|
}, {
|
|
x: 1,
|
|
y: -2
|
|
}, {
|
|
x: -2,
|
|
y: -1
|
|
}, {
|
|
x: -1,
|
|
y: -1
|
|
}, {
|
|
x: 0,
|
|
y: -1
|
|
}, {
|
|
x: 1,
|
|
y: -1
|
|
}, {
|
|
x: -2,
|
|
y: 0
|
|
}, {
|
|
x: -1,
|
|
y: 0
|
|
}], [{
|
|
x: -3,
|
|
y: -1
|
|
}, {
|
|
x: -2,
|
|
y: -1
|
|
}, {
|
|
x: -1,
|
|
y: -1
|
|
}, {
|
|
x: 0,
|
|
y: -1
|
|
}, {
|
|
x: 1,
|
|
y: -1
|
|
}, {
|
|
x: -4,
|
|
y: 0
|
|
}, {
|
|
x: -3,
|
|
y: 0
|
|
}, {
|
|
x: -2,
|
|
y: 0
|
|
}, {
|
|
x: -1,
|
|
y: 0
|
|
}]];
|
|
var RefinementTemplates = [{
|
|
coding: [{
|
|
x: 0,
|
|
y: -1
|
|
}, {
|
|
x: 1,
|
|
y: -1
|
|
}, {
|
|
x: -1,
|
|
y: 0
|
|
}],
|
|
reference: [{
|
|
x: 0,
|
|
y: -1
|
|
}, {
|
|
x: 1,
|
|
y: -1
|
|
}, {
|
|
x: -1,
|
|
y: 0
|
|
}, {
|
|
x: 0,
|
|
y: 0
|
|
}, {
|
|
x: 1,
|
|
y: 0
|
|
}, {
|
|
x: -1,
|
|
y: 1
|
|
}, {
|
|
x: 0,
|
|
y: 1
|
|
}, {
|
|
x: 1,
|
|
y: 1
|
|
}]
|
|
}, {
|
|
coding: [{
|
|
x: -1,
|
|
y: -1
|
|
}, {
|
|
x: 0,
|
|
y: -1
|
|
}, {
|
|
x: 1,
|
|
y: -1
|
|
}, {
|
|
x: -1,
|
|
y: 0
|
|
}],
|
|
reference: [{
|
|
x: 0,
|
|
y: -1
|
|
}, {
|
|
x: -1,
|
|
y: 0
|
|
}, {
|
|
x: 0,
|
|
y: 0
|
|
}, {
|
|
x: 1,
|
|
y: 0
|
|
}, {
|
|
x: 0,
|
|
y: 1
|
|
}, {
|
|
x: 1,
|
|
y: 1
|
|
}]
|
|
}];
|
|
var ReusedContexts = [0x9b25, 0x0795, 0x00e5, 0x0195];
|
|
var RefinementReusedContexts = [0x0020, 0x0008];
|
|
|
|
function decodeBitmapTemplate0(width, height, decodingContext) {
|
|
var decoder = decodingContext.decoder;
|
|
var contexts = decodingContext.contextCache.getContexts("GB");
|
|
var contextLabel,
|
|
i,
|
|
j,
|
|
pixel,
|
|
row,
|
|
row1,
|
|
row2,
|
|
bitmap = [];
|
|
var OLD_PIXEL_MASK = 0x7bf7;
|
|
|
|
for (i = 0; i < height; i++) {
|
|
row = bitmap[i] = new Uint8Array(width);
|
|
row1 = i < 1 ? row : bitmap[i - 1];
|
|
row2 = i < 2 ? row : bitmap[i - 2];
|
|
contextLabel = row2[0] << 13 | row2[1] << 12 | row2[2] << 11 | row1[0] << 7 | row1[1] << 6 | row1[2] << 5 | row1[3] << 4;
|
|
|
|
for (j = 0; j < width; j++) {
|
|
row[j] = pixel = decoder.readBit(contexts, contextLabel);
|
|
contextLabel = (contextLabel & OLD_PIXEL_MASK) << 1 | (j + 3 < width ? row2[j + 3] << 11 : 0) | (j + 4 < width ? row1[j + 4] << 4 : 0) | pixel;
|
|
}
|
|
}
|
|
|
|
return bitmap;
|
|
}
|
|
|
|
function decodeBitmap(mmr, width, height, templateIndex, prediction, skip, at, decodingContext) {
|
|
if (mmr) {
|
|
const input = new Reader(decodingContext.data, decodingContext.start, decodingContext.end);
|
|
return decodeMMRBitmap(input, width, height, false);
|
|
}
|
|
|
|
if (templateIndex === 0 && !skip && !prediction && at.length === 4 && at[0].x === 3 && at[0].y === -1 && at[1].x === -3 && at[1].y === -1 && at[2].x === 2 && at[2].y === -2 && at[3].x === -2 && at[3].y === -2) {
|
|
return decodeBitmapTemplate0(width, height, decodingContext);
|
|
}
|
|
|
|
var useskip = !!skip;
|
|
var template = CodingTemplates[templateIndex].concat(at);
|
|
template.sort(function (a, b) {
|
|
return a.y - b.y || a.x - b.x;
|
|
});
|
|
var templateLength = template.length;
|
|
var templateX = new Int8Array(templateLength);
|
|
var templateY = new Int8Array(templateLength);
|
|
var changingTemplateEntries = [];
|
|
var reuseMask = 0,
|
|
minX = 0,
|
|
maxX = 0,
|
|
minY = 0;
|
|
var c, k;
|
|
|
|
for (k = 0; k < templateLength; k++) {
|
|
templateX[k] = template[k].x;
|
|
templateY[k] = template[k].y;
|
|
minX = Math.min(minX, template[k].x);
|
|
maxX = Math.max(maxX, template[k].x);
|
|
minY = Math.min(minY, template[k].y);
|
|
|
|
if (k < templateLength - 1 && template[k].y === template[k + 1].y && template[k].x === template[k + 1].x - 1) {
|
|
reuseMask |= 1 << templateLength - 1 - k;
|
|
} else {
|
|
changingTemplateEntries.push(k);
|
|
}
|
|
}
|
|
|
|
var changingEntriesLength = changingTemplateEntries.length;
|
|
var changingTemplateX = new Int8Array(changingEntriesLength);
|
|
var changingTemplateY = new Int8Array(changingEntriesLength);
|
|
var changingTemplateBit = new Uint16Array(changingEntriesLength);
|
|
|
|
for (c = 0; c < changingEntriesLength; c++) {
|
|
k = changingTemplateEntries[c];
|
|
changingTemplateX[c] = template[k].x;
|
|
changingTemplateY[c] = template[k].y;
|
|
changingTemplateBit[c] = 1 << templateLength - 1 - k;
|
|
}
|
|
|
|
var sbb_left = -minX;
|
|
var sbb_top = -minY;
|
|
var sbb_right = width - maxX;
|
|
var pseudoPixelContext = ReusedContexts[templateIndex];
|
|
var row = new Uint8Array(width);
|
|
var bitmap = [];
|
|
var decoder = decodingContext.decoder;
|
|
var contexts = decodingContext.contextCache.getContexts("GB");
|
|
var ltp = 0,
|
|
j,
|
|
i0,
|
|
j0,
|
|
contextLabel = 0,
|
|
bit,
|
|
shift;
|
|
|
|
for (var i = 0; i < height; i++) {
|
|
if (prediction) {
|
|
var sltp = decoder.readBit(contexts, pseudoPixelContext);
|
|
ltp ^= sltp;
|
|
|
|
if (ltp) {
|
|
bitmap.push(row);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
row = new Uint8Array(row);
|
|
bitmap.push(row);
|
|
|
|
for (j = 0; j < width; j++) {
|
|
if (useskip && skip[i][j]) {
|
|
row[j] = 0;
|
|
continue;
|
|
}
|
|
|
|
if (j >= sbb_left && j < sbb_right && i >= sbb_top) {
|
|
contextLabel = contextLabel << 1 & reuseMask;
|
|
|
|
for (k = 0; k < changingEntriesLength; k++) {
|
|
i0 = i + changingTemplateY[k];
|
|
j0 = j + changingTemplateX[k];
|
|
bit = bitmap[i0][j0];
|
|
|
|
if (bit) {
|
|
bit = changingTemplateBit[k];
|
|
contextLabel |= bit;
|
|
}
|
|
}
|
|
} else {
|
|
contextLabel = 0;
|
|
shift = templateLength - 1;
|
|
|
|
for (k = 0; k < templateLength; k++, shift--) {
|
|
j0 = j + templateX[k];
|
|
|
|
if (j0 >= 0 && j0 < width) {
|
|
i0 = i + templateY[k];
|
|
|
|
if (i0 >= 0) {
|
|
bit = bitmap[i0][j0];
|
|
|
|
if (bit) {
|
|
contextLabel |= bit << shift;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
var pixel = decoder.readBit(contexts, contextLabel);
|
|
row[j] = pixel;
|
|
}
|
|
}
|
|
|
|
return bitmap;
|
|
}
|
|
|
|
function decodeRefinement(width, height, templateIndex, referenceBitmap, offsetX, offsetY, prediction, at, decodingContext) {
|
|
var codingTemplate = RefinementTemplates[templateIndex].coding;
|
|
|
|
if (templateIndex === 0) {
|
|
codingTemplate = codingTemplate.concat([at[0]]);
|
|
}
|
|
|
|
var codingTemplateLength = codingTemplate.length;
|
|
var codingTemplateX = new Int32Array(codingTemplateLength);
|
|
var codingTemplateY = new Int32Array(codingTemplateLength);
|
|
var k;
|
|
|
|
for (k = 0; k < codingTemplateLength; k++) {
|
|
codingTemplateX[k] = codingTemplate[k].x;
|
|
codingTemplateY[k] = codingTemplate[k].y;
|
|
}
|
|
|
|
var referenceTemplate = RefinementTemplates[templateIndex].reference;
|
|
|
|
if (templateIndex === 0) {
|
|
referenceTemplate = referenceTemplate.concat([at[1]]);
|
|
}
|
|
|
|
var referenceTemplateLength = referenceTemplate.length;
|
|
var referenceTemplateX = new Int32Array(referenceTemplateLength);
|
|
var referenceTemplateY = new Int32Array(referenceTemplateLength);
|
|
|
|
for (k = 0; k < referenceTemplateLength; k++) {
|
|
referenceTemplateX[k] = referenceTemplate[k].x;
|
|
referenceTemplateY[k] = referenceTemplate[k].y;
|
|
}
|
|
|
|
var referenceWidth = referenceBitmap[0].length;
|
|
var referenceHeight = referenceBitmap.length;
|
|
var pseudoPixelContext = RefinementReusedContexts[templateIndex];
|
|
var bitmap = [];
|
|
var decoder = decodingContext.decoder;
|
|
var contexts = decodingContext.contextCache.getContexts("GR");
|
|
var ltp = 0;
|
|
|
|
for (var i = 0; i < height; i++) {
|
|
if (prediction) {
|
|
var sltp = decoder.readBit(contexts, pseudoPixelContext);
|
|
ltp ^= sltp;
|
|
|
|
if (ltp) {
|
|
throw new Jbig2Error("prediction is not supported");
|
|
}
|
|
}
|
|
|
|
var row = new Uint8Array(width);
|
|
bitmap.push(row);
|
|
|
|
for (var j = 0; j < width; j++) {
|
|
var i0, j0;
|
|
var contextLabel = 0;
|
|
|
|
for (k = 0; k < codingTemplateLength; k++) {
|
|
i0 = i + codingTemplateY[k];
|
|
j0 = j + codingTemplateX[k];
|
|
|
|
if (i0 < 0 || j0 < 0 || j0 >= width) {
|
|
contextLabel <<= 1;
|
|
} else {
|
|
contextLabel = contextLabel << 1 | bitmap[i0][j0];
|
|
}
|
|
}
|
|
|
|
for (k = 0; k < referenceTemplateLength; k++) {
|
|
i0 = i + referenceTemplateY[k] - offsetY;
|
|
j0 = j + referenceTemplateX[k] - offsetX;
|
|
|
|
if (i0 < 0 || i0 >= referenceHeight || j0 < 0 || j0 >= referenceWidth) {
|
|
contextLabel <<= 1;
|
|
} else {
|
|
contextLabel = contextLabel << 1 | referenceBitmap[i0][j0];
|
|
}
|
|
}
|
|
|
|
var pixel = decoder.readBit(contexts, contextLabel);
|
|
row[j] = pixel;
|
|
}
|
|
}
|
|
|
|
return bitmap;
|
|
}
|
|
|
|
function decodeSymbolDictionary(huffman, refinement, symbols, numberOfNewSymbols, numberOfExportedSymbols, huffmanTables, templateIndex, at, refinementTemplateIndex, refinementAt, decodingContext, huffmanInput) {
|
|
if (huffman && refinement) {
|
|
throw new Jbig2Error("symbol refinement with Huffman is not supported");
|
|
}
|
|
|
|
var newSymbols = [];
|
|
var currentHeight = 0;
|
|
var symbolCodeLength = (0, _core_utils.log2)(symbols.length + numberOfNewSymbols);
|
|
var decoder = decodingContext.decoder;
|
|
var contextCache = decodingContext.contextCache;
|
|
let tableB1, symbolWidths;
|
|
|
|
if (huffman) {
|
|
tableB1 = getStandardTable(1);
|
|
symbolWidths = [];
|
|
symbolCodeLength = Math.max(symbolCodeLength, 1);
|
|
}
|
|
|
|
while (newSymbols.length < numberOfNewSymbols) {
|
|
var deltaHeight = huffman ? huffmanTables.tableDeltaHeight.decode(huffmanInput) : decodeInteger(contextCache, "IADH", decoder);
|
|
currentHeight += deltaHeight;
|
|
let currentWidth = 0,
|
|
totalWidth = 0;
|
|
const firstSymbol = huffman ? symbolWidths.length : 0;
|
|
|
|
while (true) {
|
|
var deltaWidth = huffman ? huffmanTables.tableDeltaWidth.decode(huffmanInput) : decodeInteger(contextCache, "IADW", decoder);
|
|
|
|
if (deltaWidth === null) {
|
|
break;
|
|
}
|
|
|
|
currentWidth += deltaWidth;
|
|
totalWidth += currentWidth;
|
|
var bitmap;
|
|
|
|
if (refinement) {
|
|
var numberOfInstances = decodeInteger(contextCache, "IAAI", decoder);
|
|
|
|
if (numberOfInstances > 1) {
|
|
bitmap = decodeTextRegion(huffman, refinement, currentWidth, currentHeight, 0, numberOfInstances, 1, symbols.concat(newSymbols), symbolCodeLength, 0, 0, 1, 0, huffmanTables, refinementTemplateIndex, refinementAt, decodingContext, 0, huffmanInput);
|
|
} else {
|
|
var symbolId = decodeIAID(contextCache, decoder, symbolCodeLength);
|
|
var rdx = decodeInteger(contextCache, "IARDX", decoder);
|
|
var rdy = decodeInteger(contextCache, "IARDY", decoder);
|
|
var symbol = symbolId < symbols.length ? symbols[symbolId] : newSymbols[symbolId - symbols.length];
|
|
bitmap = decodeRefinement(currentWidth, currentHeight, refinementTemplateIndex, symbol, rdx, rdy, false, refinementAt, decodingContext);
|
|
}
|
|
|
|
newSymbols.push(bitmap);
|
|
} else if (huffman) {
|
|
symbolWidths.push(currentWidth);
|
|
} else {
|
|
bitmap = decodeBitmap(false, currentWidth, currentHeight, templateIndex, false, null, at, decodingContext);
|
|
newSymbols.push(bitmap);
|
|
}
|
|
}
|
|
|
|
if (huffman && !refinement) {
|
|
const bitmapSize = huffmanTables.tableBitmapSize.decode(huffmanInput);
|
|
huffmanInput.byteAlign();
|
|
let collectiveBitmap;
|
|
|
|
if (bitmapSize === 0) {
|
|
collectiveBitmap = readUncompressedBitmap(huffmanInput, totalWidth, currentHeight);
|
|
} else {
|
|
const originalEnd = huffmanInput.end;
|
|
const bitmapEnd = huffmanInput.position + bitmapSize;
|
|
huffmanInput.end = bitmapEnd;
|
|
collectiveBitmap = decodeMMRBitmap(huffmanInput, totalWidth, currentHeight, false);
|
|
huffmanInput.end = originalEnd;
|
|
huffmanInput.position = bitmapEnd;
|
|
}
|
|
|
|
const numberOfSymbolsDecoded = symbolWidths.length;
|
|
|
|
if (firstSymbol === numberOfSymbolsDecoded - 1) {
|
|
newSymbols.push(collectiveBitmap);
|
|
} else {
|
|
let i,
|
|
y,
|
|
xMin = 0,
|
|
xMax,
|
|
bitmapWidth,
|
|
symbolBitmap;
|
|
|
|
for (i = firstSymbol; i < numberOfSymbolsDecoded; i++) {
|
|
bitmapWidth = symbolWidths[i];
|
|
xMax = xMin + bitmapWidth;
|
|
symbolBitmap = [];
|
|
|
|
for (y = 0; y < currentHeight; y++) {
|
|
symbolBitmap.push(collectiveBitmap[y].subarray(xMin, xMax));
|
|
}
|
|
|
|
newSymbols.push(symbolBitmap);
|
|
xMin = xMax;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
var exportedSymbols = [];
|
|
var flags = [],
|
|
currentFlag = false;
|
|
var totalSymbolsLength = symbols.length + numberOfNewSymbols;
|
|
|
|
while (flags.length < totalSymbolsLength) {
|
|
var runLength = huffman ? tableB1.decode(huffmanInput) : decodeInteger(contextCache, "IAEX", decoder);
|
|
|
|
while (runLength--) {
|
|
flags.push(currentFlag);
|
|
}
|
|
|
|
currentFlag = !currentFlag;
|
|
}
|
|
|
|
for (var i = 0, ii = symbols.length; i < ii; i++) {
|
|
if (flags[i]) {
|
|
exportedSymbols.push(symbols[i]);
|
|
}
|
|
}
|
|
|
|
for (var j = 0; j < numberOfNewSymbols; i++, j++) {
|
|
if (flags[i]) {
|
|
exportedSymbols.push(newSymbols[j]);
|
|
}
|
|
}
|
|
|
|
return exportedSymbols;
|
|
}
|
|
|
|
function decodeTextRegion(huffman, refinement, width, height, defaultPixelValue, numberOfSymbolInstances, stripSize, inputSymbols, symbolCodeLength, transposed, dsOffset, referenceCorner, combinationOperator, huffmanTables, refinementTemplateIndex, refinementAt, decodingContext, logStripSize, huffmanInput) {
|
|
if (huffman && refinement) {
|
|
throw new Jbig2Error("refinement with Huffman is not supported");
|
|
}
|
|
|
|
var bitmap = [];
|
|
var i, row;
|
|
|
|
for (i = 0; i < height; i++) {
|
|
row = new Uint8Array(width);
|
|
|
|
if (defaultPixelValue) {
|
|
for (var j = 0; j < width; j++) {
|
|
row[j] = defaultPixelValue;
|
|
}
|
|
}
|
|
|
|
bitmap.push(row);
|
|
}
|
|
|
|
var decoder = decodingContext.decoder;
|
|
var contextCache = decodingContext.contextCache;
|
|
var stripT = huffman ? -huffmanTables.tableDeltaT.decode(huffmanInput) : -decodeInteger(contextCache, "IADT", decoder);
|
|
var firstS = 0;
|
|
i = 0;
|
|
|
|
while (i < numberOfSymbolInstances) {
|
|
var deltaT = huffman ? huffmanTables.tableDeltaT.decode(huffmanInput) : decodeInteger(contextCache, "IADT", decoder);
|
|
stripT += deltaT;
|
|
var deltaFirstS = huffman ? huffmanTables.tableFirstS.decode(huffmanInput) : decodeInteger(contextCache, "IAFS", decoder);
|
|
firstS += deltaFirstS;
|
|
var currentS = firstS;
|
|
|
|
do {
|
|
let currentT = 0;
|
|
|
|
if (stripSize > 1) {
|
|
currentT = huffman ? huffmanInput.readBits(logStripSize) : decodeInteger(contextCache, "IAIT", decoder);
|
|
}
|
|
|
|
var t = stripSize * stripT + currentT;
|
|
var symbolId = huffman ? huffmanTables.symbolIDTable.decode(huffmanInput) : decodeIAID(contextCache, decoder, symbolCodeLength);
|
|
var applyRefinement = refinement && (huffman ? huffmanInput.readBit() : decodeInteger(contextCache, "IARI", decoder));
|
|
var symbolBitmap = inputSymbols[symbolId];
|
|
var symbolWidth = symbolBitmap[0].length;
|
|
var symbolHeight = symbolBitmap.length;
|
|
|
|
if (applyRefinement) {
|
|
var rdw = decodeInteger(contextCache, "IARDW", decoder);
|
|
var rdh = decodeInteger(contextCache, "IARDH", decoder);
|
|
var rdx = decodeInteger(contextCache, "IARDX", decoder);
|
|
var rdy = decodeInteger(contextCache, "IARDY", decoder);
|
|
symbolWidth += rdw;
|
|
symbolHeight += rdh;
|
|
symbolBitmap = decodeRefinement(symbolWidth, symbolHeight, refinementTemplateIndex, symbolBitmap, (rdw >> 1) + rdx, (rdh >> 1) + rdy, false, refinementAt, decodingContext);
|
|
}
|
|
|
|
var offsetT = t - (referenceCorner & 1 ? 0 : symbolHeight - 1);
|
|
var offsetS = currentS - (referenceCorner & 2 ? symbolWidth - 1 : 0);
|
|
var s2, t2, symbolRow;
|
|
|
|
if (transposed) {
|
|
for (s2 = 0; s2 < symbolHeight; s2++) {
|
|
row = bitmap[offsetS + s2];
|
|
|
|
if (!row) {
|
|
continue;
|
|
}
|
|
|
|
symbolRow = symbolBitmap[s2];
|
|
var maxWidth = Math.min(width - offsetT, symbolWidth);
|
|
|
|
switch (combinationOperator) {
|
|
case 0:
|
|
for (t2 = 0; t2 < maxWidth; t2++) {
|
|
row[offsetT + t2] |= symbolRow[t2];
|
|
}
|
|
|
|
break;
|
|
|
|
case 2:
|
|
for (t2 = 0; t2 < maxWidth; t2++) {
|
|
row[offsetT + t2] ^= symbolRow[t2];
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
throw new Jbig2Error(`operator ${combinationOperator} is not supported`);
|
|
}
|
|
}
|
|
|
|
currentS += symbolHeight - 1;
|
|
} else {
|
|
for (t2 = 0; t2 < symbolHeight; t2++) {
|
|
row = bitmap[offsetT + t2];
|
|
|
|
if (!row) {
|
|
continue;
|
|
}
|
|
|
|
symbolRow = symbolBitmap[t2];
|
|
|
|
switch (combinationOperator) {
|
|
case 0:
|
|
for (s2 = 0; s2 < symbolWidth; s2++) {
|
|
row[offsetS + s2] |= symbolRow[s2];
|
|
}
|
|
|
|
break;
|
|
|
|
case 2:
|
|
for (s2 = 0; s2 < symbolWidth; s2++) {
|
|
row[offsetS + s2] ^= symbolRow[s2];
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
throw new Jbig2Error(`operator ${combinationOperator} is not supported`);
|
|
}
|
|
}
|
|
|
|
currentS += symbolWidth - 1;
|
|
}
|
|
|
|
i++;
|
|
var deltaS = huffman ? huffmanTables.tableDeltaS.decode(huffmanInput) : decodeInteger(contextCache, "IADS", decoder);
|
|
|
|
if (deltaS === null) {
|
|
break;
|
|
}
|
|
|
|
currentS += deltaS + dsOffset;
|
|
} while (true);
|
|
}
|
|
|
|
return bitmap;
|
|
}
|
|
|
|
function decodePatternDictionary(mmr, patternWidth, patternHeight, maxPatternIndex, template, decodingContext) {
|
|
const at = [];
|
|
|
|
if (!mmr) {
|
|
at.push({
|
|
x: -patternWidth,
|
|
y: 0
|
|
});
|
|
|
|
if (template === 0) {
|
|
at.push({
|
|
x: -3,
|
|
y: -1
|
|
});
|
|
at.push({
|
|
x: 2,
|
|
y: -2
|
|
});
|
|
at.push({
|
|
x: -2,
|
|
y: -2
|
|
});
|
|
}
|
|
}
|
|
|
|
const collectiveWidth = (maxPatternIndex + 1) * patternWidth;
|
|
const collectiveBitmap = decodeBitmap(mmr, collectiveWidth, patternHeight, template, false, null, at, decodingContext);
|
|
const patterns = [];
|
|
|
|
for (let i = 0; i <= maxPatternIndex; i++) {
|
|
const patternBitmap = [];
|
|
const xMin = patternWidth * i;
|
|
const xMax = xMin + patternWidth;
|
|
|
|
for (let y = 0; y < patternHeight; y++) {
|
|
patternBitmap.push(collectiveBitmap[y].subarray(xMin, xMax));
|
|
}
|
|
|
|
patterns.push(patternBitmap);
|
|
}
|
|
|
|
return patterns;
|
|
}
|
|
|
|
function decodeHalftoneRegion(mmr, patterns, template, regionWidth, regionHeight, defaultPixelValue, enableSkip, combinationOperator, gridWidth, gridHeight, gridOffsetX, gridOffsetY, gridVectorX, gridVectorY, decodingContext) {
|
|
const skip = null;
|
|
|
|
if (enableSkip) {
|
|
throw new Jbig2Error("skip is not supported");
|
|
}
|
|
|
|
if (combinationOperator !== 0) {
|
|
throw new Jbig2Error("operator " + combinationOperator + " is not supported in halftone region");
|
|
}
|
|
|
|
const regionBitmap = [];
|
|
let i, j, row;
|
|
|
|
for (i = 0; i < regionHeight; i++) {
|
|
row = new Uint8Array(regionWidth);
|
|
|
|
if (defaultPixelValue) {
|
|
for (j = 0; j < regionWidth; j++) {
|
|
row[j] = defaultPixelValue;
|
|
}
|
|
}
|
|
|
|
regionBitmap.push(row);
|
|
}
|
|
|
|
const numberOfPatterns = patterns.length;
|
|
const pattern0 = patterns[0];
|
|
const patternWidth = pattern0[0].length,
|
|
patternHeight = pattern0.length;
|
|
const bitsPerValue = (0, _core_utils.log2)(numberOfPatterns);
|
|
const at = [];
|
|
|
|
if (!mmr) {
|
|
at.push({
|
|
x: template <= 1 ? 3 : 2,
|
|
y: -1
|
|
});
|
|
|
|
if (template === 0) {
|
|
at.push({
|
|
x: -3,
|
|
y: -1
|
|
});
|
|
at.push({
|
|
x: 2,
|
|
y: -2
|
|
});
|
|
at.push({
|
|
x: -2,
|
|
y: -2
|
|
});
|
|
}
|
|
}
|
|
|
|
const grayScaleBitPlanes = [];
|
|
let mmrInput, bitmap;
|
|
|
|
if (mmr) {
|
|
mmrInput = new Reader(decodingContext.data, decodingContext.start, decodingContext.end);
|
|
}
|
|
|
|
for (i = bitsPerValue - 1; i >= 0; i--) {
|
|
if (mmr) {
|
|
bitmap = decodeMMRBitmap(mmrInput, gridWidth, gridHeight, true);
|
|
} else {
|
|
bitmap = decodeBitmap(false, gridWidth, gridHeight, template, false, skip, at, decodingContext);
|
|
}
|
|
|
|
grayScaleBitPlanes[i] = bitmap;
|
|
}
|
|
|
|
let mg, ng, bit, patternIndex, patternBitmap, x, y, patternRow, regionRow;
|
|
|
|
for (mg = 0; mg < gridHeight; mg++) {
|
|
for (ng = 0; ng < gridWidth; ng++) {
|
|
bit = 0;
|
|
patternIndex = 0;
|
|
|
|
for (j = bitsPerValue - 1; j >= 0; j--) {
|
|
bit = grayScaleBitPlanes[j][mg][ng] ^ bit;
|
|
patternIndex |= bit << j;
|
|
}
|
|
|
|
patternBitmap = patterns[patternIndex];
|
|
x = gridOffsetX + mg * gridVectorY + ng * gridVectorX >> 8;
|
|
y = gridOffsetY + mg * gridVectorX - ng * gridVectorY >> 8;
|
|
|
|
if (x >= 0 && x + patternWidth <= regionWidth && y >= 0 && y + patternHeight <= regionHeight) {
|
|
for (i = 0; i < patternHeight; i++) {
|
|
regionRow = regionBitmap[y + i];
|
|
patternRow = patternBitmap[i];
|
|
|
|
for (j = 0; j < patternWidth; j++) {
|
|
regionRow[x + j] |= patternRow[j];
|
|
}
|
|
}
|
|
} else {
|
|
let regionX, regionY;
|
|
|
|
for (i = 0; i < patternHeight; i++) {
|
|
regionY = y + i;
|
|
|
|
if (regionY < 0 || regionY >= regionHeight) {
|
|
continue;
|
|
}
|
|
|
|
regionRow = regionBitmap[regionY];
|
|
patternRow = patternBitmap[i];
|
|
|
|
for (j = 0; j < patternWidth; j++) {
|
|
regionX = x + j;
|
|
|
|
if (regionX >= 0 && regionX < regionWidth) {
|
|
regionRow[regionX] |= patternRow[j];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return regionBitmap;
|
|
}
|
|
|
|
function readSegmentHeader(data, start) {
|
|
var segmentHeader = {};
|
|
segmentHeader.number = (0, _core_utils.readUint32)(data, start);
|
|
var flags = data[start + 4];
|
|
var segmentType = flags & 0x3f;
|
|
|
|
if (!SegmentTypes[segmentType]) {
|
|
throw new Jbig2Error("invalid segment type: " + segmentType);
|
|
}
|
|
|
|
segmentHeader.type = segmentType;
|
|
segmentHeader.typeName = SegmentTypes[segmentType];
|
|
segmentHeader.deferredNonRetain = !!(flags & 0x80);
|
|
var pageAssociationFieldSize = !!(flags & 0x40);
|
|
var referredFlags = data[start + 5];
|
|
var referredToCount = referredFlags >> 5 & 7;
|
|
var retainBits = [referredFlags & 31];
|
|
var position = start + 6;
|
|
|
|
if (referredFlags === 7) {
|
|
referredToCount = (0, _core_utils.readUint32)(data, position - 1) & 0x1fffffff;
|
|
position += 3;
|
|
var bytes = referredToCount + 7 >> 3;
|
|
retainBits[0] = data[position++];
|
|
|
|
while (--bytes > 0) {
|
|
retainBits.push(data[position++]);
|
|
}
|
|
} else if (referredFlags === 5 || referredFlags === 6) {
|
|
throw new Jbig2Error("invalid referred-to flags");
|
|
}
|
|
|
|
segmentHeader.retainBits = retainBits;
|
|
let referredToSegmentNumberSize = 4;
|
|
|
|
if (segmentHeader.number <= 256) {
|
|
referredToSegmentNumberSize = 1;
|
|
} else if (segmentHeader.number <= 65536) {
|
|
referredToSegmentNumberSize = 2;
|
|
}
|
|
|
|
var referredTo = [];
|
|
var i, ii;
|
|
|
|
for (i = 0; i < referredToCount; i++) {
|
|
let number;
|
|
|
|
if (referredToSegmentNumberSize === 1) {
|
|
number = data[position];
|
|
} else if (referredToSegmentNumberSize === 2) {
|
|
number = (0, _core_utils.readUint16)(data, position);
|
|
} else {
|
|
number = (0, _core_utils.readUint32)(data, position);
|
|
}
|
|
|
|
referredTo.push(number);
|
|
position += referredToSegmentNumberSize;
|
|
}
|
|
|
|
segmentHeader.referredTo = referredTo;
|
|
|
|
if (!pageAssociationFieldSize) {
|
|
segmentHeader.pageAssociation = data[position++];
|
|
} else {
|
|
segmentHeader.pageAssociation = (0, _core_utils.readUint32)(data, position);
|
|
position += 4;
|
|
}
|
|
|
|
segmentHeader.length = (0, _core_utils.readUint32)(data, position);
|
|
position += 4;
|
|
|
|
if (segmentHeader.length === 0xffffffff) {
|
|
if (segmentType === 38) {
|
|
var genericRegionInfo = readRegionSegmentInformation(data, position);
|
|
var genericRegionSegmentFlags = data[position + RegionSegmentInformationFieldLength];
|
|
var genericRegionMmr = !!(genericRegionSegmentFlags & 1);
|
|
var searchPatternLength = 6;
|
|
var searchPattern = new Uint8Array(searchPatternLength);
|
|
|
|
if (!genericRegionMmr) {
|
|
searchPattern[0] = 0xff;
|
|
searchPattern[1] = 0xac;
|
|
}
|
|
|
|
searchPattern[2] = genericRegionInfo.height >>> 24 & 0xff;
|
|
searchPattern[3] = genericRegionInfo.height >> 16 & 0xff;
|
|
searchPattern[4] = genericRegionInfo.height >> 8 & 0xff;
|
|
searchPattern[5] = genericRegionInfo.height & 0xff;
|
|
|
|
for (i = position, ii = data.length; i < ii; i++) {
|
|
var j = 0;
|
|
|
|
while (j < searchPatternLength && searchPattern[j] === data[i + j]) {
|
|
j++;
|
|
}
|
|
|
|
if (j === searchPatternLength) {
|
|
segmentHeader.length = i + searchPatternLength;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (segmentHeader.length === 0xffffffff) {
|
|
throw new Jbig2Error("segment end was not found");
|
|
}
|
|
} else {
|
|
throw new Jbig2Error("invalid unknown segment length");
|
|
}
|
|
}
|
|
|
|
segmentHeader.headerEnd = position;
|
|
return segmentHeader;
|
|
}
|
|
|
|
function readSegments(header, data, start, end) {
|
|
var segments = [];
|
|
var position = start;
|
|
|
|
while (position < end) {
|
|
var segmentHeader = readSegmentHeader(data, position);
|
|
position = segmentHeader.headerEnd;
|
|
var segment = {
|
|
header: segmentHeader,
|
|
data
|
|
};
|
|
|
|
if (!header.randomAccess) {
|
|
segment.start = position;
|
|
position += segmentHeader.length;
|
|
segment.end = position;
|
|
}
|
|
|
|
segments.push(segment);
|
|
|
|
if (segmentHeader.type === 51) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (header.randomAccess) {
|
|
for (var i = 0, ii = segments.length; i < ii; i++) {
|
|
segments[i].start = position;
|
|
position += segments[i].header.length;
|
|
segments[i].end = position;
|
|
}
|
|
}
|
|
|
|
return segments;
|
|
}
|
|
|
|
function readRegionSegmentInformation(data, start) {
|
|
return {
|
|
width: (0, _core_utils.readUint32)(data, start),
|
|
height: (0, _core_utils.readUint32)(data, start + 4),
|
|
x: (0, _core_utils.readUint32)(data, start + 8),
|
|
y: (0, _core_utils.readUint32)(data, start + 12),
|
|
combinationOperator: data[start + 16] & 7
|
|
};
|
|
}
|
|
|
|
var RegionSegmentInformationFieldLength = 17;
|
|
|
|
function processSegment(segment, visitor) {
|
|
var header = segment.header;
|
|
var data = segment.data,
|
|
position = segment.start,
|
|
end = segment.end;
|
|
var args, at, i, atLength;
|
|
|
|
switch (header.type) {
|
|
case 0:
|
|
var dictionary = {};
|
|
var dictionaryFlags = (0, _core_utils.readUint16)(data, position);
|
|
dictionary.huffman = !!(dictionaryFlags & 1);
|
|
dictionary.refinement = !!(dictionaryFlags & 2);
|
|
dictionary.huffmanDHSelector = dictionaryFlags >> 2 & 3;
|
|
dictionary.huffmanDWSelector = dictionaryFlags >> 4 & 3;
|
|
dictionary.bitmapSizeSelector = dictionaryFlags >> 6 & 1;
|
|
dictionary.aggregationInstancesSelector = dictionaryFlags >> 7 & 1;
|
|
dictionary.bitmapCodingContextUsed = !!(dictionaryFlags & 256);
|
|
dictionary.bitmapCodingContextRetained = !!(dictionaryFlags & 512);
|
|
dictionary.template = dictionaryFlags >> 10 & 3;
|
|
dictionary.refinementTemplate = dictionaryFlags >> 12 & 1;
|
|
position += 2;
|
|
|
|
if (!dictionary.huffman) {
|
|
atLength = dictionary.template === 0 ? 4 : 1;
|
|
at = [];
|
|
|
|
for (i = 0; i < atLength; i++) {
|
|
at.push({
|
|
x: (0, _core_utils.readInt8)(data, position),
|
|
y: (0, _core_utils.readInt8)(data, position + 1)
|
|
});
|
|
position += 2;
|
|
}
|
|
|
|
dictionary.at = at;
|
|
}
|
|
|
|
if (dictionary.refinement && !dictionary.refinementTemplate) {
|
|
at = [];
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
at.push({
|
|
x: (0, _core_utils.readInt8)(data, position),
|
|
y: (0, _core_utils.readInt8)(data, position + 1)
|
|
});
|
|
position += 2;
|
|
}
|
|
|
|
dictionary.refinementAt = at;
|
|
}
|
|
|
|
dictionary.numberOfExportedSymbols = (0, _core_utils.readUint32)(data, position);
|
|
position += 4;
|
|
dictionary.numberOfNewSymbols = (0, _core_utils.readUint32)(data, position);
|
|
position += 4;
|
|
args = [dictionary, header.number, header.referredTo, data, position, end];
|
|
break;
|
|
|
|
case 6:
|
|
case 7:
|
|
var textRegion = {};
|
|
textRegion.info = readRegionSegmentInformation(data, position);
|
|
position += RegionSegmentInformationFieldLength;
|
|
var textRegionSegmentFlags = (0, _core_utils.readUint16)(data, position);
|
|
position += 2;
|
|
textRegion.huffman = !!(textRegionSegmentFlags & 1);
|
|
textRegion.refinement = !!(textRegionSegmentFlags & 2);
|
|
textRegion.logStripSize = textRegionSegmentFlags >> 2 & 3;
|
|
textRegion.stripSize = 1 << textRegion.logStripSize;
|
|
textRegion.referenceCorner = textRegionSegmentFlags >> 4 & 3;
|
|
textRegion.transposed = !!(textRegionSegmentFlags & 64);
|
|
textRegion.combinationOperator = textRegionSegmentFlags >> 7 & 3;
|
|
textRegion.defaultPixelValue = textRegionSegmentFlags >> 9 & 1;
|
|
textRegion.dsOffset = textRegionSegmentFlags << 17 >> 27;
|
|
textRegion.refinementTemplate = textRegionSegmentFlags >> 15 & 1;
|
|
|
|
if (textRegion.huffman) {
|
|
var textRegionHuffmanFlags = (0, _core_utils.readUint16)(data, position);
|
|
position += 2;
|
|
textRegion.huffmanFS = textRegionHuffmanFlags & 3;
|
|
textRegion.huffmanDS = textRegionHuffmanFlags >> 2 & 3;
|
|
textRegion.huffmanDT = textRegionHuffmanFlags >> 4 & 3;
|
|
textRegion.huffmanRefinementDW = textRegionHuffmanFlags >> 6 & 3;
|
|
textRegion.huffmanRefinementDH = textRegionHuffmanFlags >> 8 & 3;
|
|
textRegion.huffmanRefinementDX = textRegionHuffmanFlags >> 10 & 3;
|
|
textRegion.huffmanRefinementDY = textRegionHuffmanFlags >> 12 & 3;
|
|
textRegion.huffmanRefinementSizeSelector = !!(textRegionHuffmanFlags & 0x4000);
|
|
}
|
|
|
|
if (textRegion.refinement && !textRegion.refinementTemplate) {
|
|
at = [];
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
at.push({
|
|
x: (0, _core_utils.readInt8)(data, position),
|
|
y: (0, _core_utils.readInt8)(data, position + 1)
|
|
});
|
|
position += 2;
|
|
}
|
|
|
|
textRegion.refinementAt = at;
|
|
}
|
|
|
|
textRegion.numberOfSymbolInstances = (0, _core_utils.readUint32)(data, position);
|
|
position += 4;
|
|
args = [textRegion, header.referredTo, data, position, end];
|
|
break;
|
|
|
|
case 16:
|
|
const patternDictionary = {};
|
|
const patternDictionaryFlags = data[position++];
|
|
patternDictionary.mmr = !!(patternDictionaryFlags & 1);
|
|
patternDictionary.template = patternDictionaryFlags >> 1 & 3;
|
|
patternDictionary.patternWidth = data[position++];
|
|
patternDictionary.patternHeight = data[position++];
|
|
patternDictionary.maxPatternIndex = (0, _core_utils.readUint32)(data, position);
|
|
position += 4;
|
|
args = [patternDictionary, header.number, data, position, end];
|
|
break;
|
|
|
|
case 22:
|
|
case 23:
|
|
const halftoneRegion = {};
|
|
halftoneRegion.info = readRegionSegmentInformation(data, position);
|
|
position += RegionSegmentInformationFieldLength;
|
|
const halftoneRegionFlags = data[position++];
|
|
halftoneRegion.mmr = !!(halftoneRegionFlags & 1);
|
|
halftoneRegion.template = halftoneRegionFlags >> 1 & 3;
|
|
halftoneRegion.enableSkip = !!(halftoneRegionFlags & 8);
|
|
halftoneRegion.combinationOperator = halftoneRegionFlags >> 4 & 7;
|
|
halftoneRegion.defaultPixelValue = halftoneRegionFlags >> 7 & 1;
|
|
halftoneRegion.gridWidth = (0, _core_utils.readUint32)(data, position);
|
|
position += 4;
|
|
halftoneRegion.gridHeight = (0, _core_utils.readUint32)(data, position);
|
|
position += 4;
|
|
halftoneRegion.gridOffsetX = (0, _core_utils.readUint32)(data, position) & 0xffffffff;
|
|
position += 4;
|
|
halftoneRegion.gridOffsetY = (0, _core_utils.readUint32)(data, position) & 0xffffffff;
|
|
position += 4;
|
|
halftoneRegion.gridVectorX = (0, _core_utils.readUint16)(data, position);
|
|
position += 2;
|
|
halftoneRegion.gridVectorY = (0, _core_utils.readUint16)(data, position);
|
|
position += 2;
|
|
args = [halftoneRegion, header.referredTo, data, position, end];
|
|
break;
|
|
|
|
case 38:
|
|
case 39:
|
|
var genericRegion = {};
|
|
genericRegion.info = readRegionSegmentInformation(data, position);
|
|
position += RegionSegmentInformationFieldLength;
|
|
var genericRegionSegmentFlags = data[position++];
|
|
genericRegion.mmr = !!(genericRegionSegmentFlags & 1);
|
|
genericRegion.template = genericRegionSegmentFlags >> 1 & 3;
|
|
genericRegion.prediction = !!(genericRegionSegmentFlags & 8);
|
|
|
|
if (!genericRegion.mmr) {
|
|
atLength = genericRegion.template === 0 ? 4 : 1;
|
|
at = [];
|
|
|
|
for (i = 0; i < atLength; i++) {
|
|
at.push({
|
|
x: (0, _core_utils.readInt8)(data, position),
|
|
y: (0, _core_utils.readInt8)(data, position + 1)
|
|
});
|
|
position += 2;
|
|
}
|
|
|
|
genericRegion.at = at;
|
|
}
|
|
|
|
args = [genericRegion, data, position, end];
|
|
break;
|
|
|
|
case 48:
|
|
var pageInfo = {
|
|
width: (0, _core_utils.readUint32)(data, position),
|
|
height: (0, _core_utils.readUint32)(data, position + 4),
|
|
resolutionX: (0, _core_utils.readUint32)(data, position + 8),
|
|
resolutionY: (0, _core_utils.readUint32)(data, position + 12)
|
|
};
|
|
|
|
if (pageInfo.height === 0xffffffff) {
|
|
delete pageInfo.height;
|
|
}
|
|
|
|
var pageSegmentFlags = data[position + 16];
|
|
(0, _core_utils.readUint16)(data, position + 17);
|
|
pageInfo.lossless = !!(pageSegmentFlags & 1);
|
|
pageInfo.refinement = !!(pageSegmentFlags & 2);
|
|
pageInfo.defaultPixelValue = pageSegmentFlags >> 2 & 1;
|
|
pageInfo.combinationOperator = pageSegmentFlags >> 3 & 3;
|
|
pageInfo.requiresBuffer = !!(pageSegmentFlags & 32);
|
|
pageInfo.combinationOperatorOverride = !!(pageSegmentFlags & 64);
|
|
args = [pageInfo];
|
|
break;
|
|
|
|
case 49:
|
|
break;
|
|
|
|
case 50:
|
|
break;
|
|
|
|
case 51:
|
|
break;
|
|
|
|
case 53:
|
|
args = [header.number, data, position, end];
|
|
break;
|
|
|
|
case 62:
|
|
break;
|
|
|
|
default:
|
|
throw new Jbig2Error(`segment type ${header.typeName}(${header.type})` + " is not implemented");
|
|
}
|
|
|
|
var callbackName = "on" + header.typeName;
|
|
|
|
if (callbackName in visitor) {
|
|
visitor[callbackName].apply(visitor, args);
|
|
}
|
|
}
|
|
|
|
function processSegments(segments, visitor) {
|
|
for (var i = 0, ii = segments.length; i < ii; i++) {
|
|
processSegment(segments[i], visitor);
|
|
}
|
|
}
|
|
|
|
function parseJbig2Chunks(chunks) {
|
|
var visitor = new SimpleSegmentVisitor();
|
|
|
|
for (var i = 0, ii = chunks.length; i < ii; i++) {
|
|
var chunk = chunks[i];
|
|
var segments = readSegments({}, chunk.data, chunk.start, chunk.end);
|
|
processSegments(segments, visitor);
|
|
}
|
|
|
|
return visitor.buffer;
|
|
}
|
|
|
|
function parseJbig2(data) {
|
|
const end = data.length;
|
|
let position = 0;
|
|
|
|
if (data[position] !== 0x97 || data[position + 1] !== 0x4a || data[position + 2] !== 0x42 || data[position + 3] !== 0x32 || data[position + 4] !== 0x0d || data[position + 5] !== 0x0a || data[position + 6] !== 0x1a || data[position + 7] !== 0x0a) {
|
|
throw new Jbig2Error("parseJbig2 - invalid header.");
|
|
}
|
|
|
|
const header = Object.create(null);
|
|
position += 8;
|
|
const flags = data[position++];
|
|
header.randomAccess = !(flags & 1);
|
|
|
|
if (!(flags & 2)) {
|
|
header.numberOfPages = (0, _core_utils.readUint32)(data, position);
|
|
position += 4;
|
|
}
|
|
|
|
const segments = readSegments(header, data, position, end);
|
|
const visitor = new SimpleSegmentVisitor();
|
|
processSegments(segments, visitor);
|
|
const {
|
|
width,
|
|
height
|
|
} = visitor.currentPageInfo;
|
|
const bitPacked = visitor.buffer;
|
|
const imgData = new Uint8ClampedArray(width * height);
|
|
let q = 0,
|
|
k = 0;
|
|
|
|
for (let i = 0; i < height; i++) {
|
|
let mask = 0,
|
|
buffer;
|
|
|
|
for (let j = 0; j < width; j++) {
|
|
if (!mask) {
|
|
mask = 128;
|
|
buffer = bitPacked[k++];
|
|
}
|
|
|
|
imgData[q++] = buffer & mask ? 0 : 255;
|
|
mask >>= 1;
|
|
}
|
|
}
|
|
|
|
return {
|
|
imgData,
|
|
width,
|
|
height
|
|
};
|
|
}
|
|
|
|
function SimpleSegmentVisitor() {}
|
|
|
|
SimpleSegmentVisitor.prototype = {
|
|
onPageInformation: function SimpleSegmentVisitor_onPageInformation(info) {
|
|
this.currentPageInfo = info;
|
|
var rowSize = info.width + 7 >> 3;
|
|
var buffer = new Uint8ClampedArray(rowSize * info.height);
|
|
|
|
if (info.defaultPixelValue) {
|
|
for (var i = 0, ii = buffer.length; i < ii; i++) {
|
|
buffer[i] = 0xff;
|
|
}
|
|
}
|
|
|
|
this.buffer = buffer;
|
|
},
|
|
drawBitmap: function SimpleSegmentVisitor_drawBitmap(regionInfo, bitmap) {
|
|
var pageInfo = this.currentPageInfo;
|
|
var width = regionInfo.width,
|
|
height = regionInfo.height;
|
|
var rowSize = pageInfo.width + 7 >> 3;
|
|
var combinationOperator = pageInfo.combinationOperatorOverride ? regionInfo.combinationOperator : pageInfo.combinationOperator;
|
|
var buffer = this.buffer;
|
|
var mask0 = 128 >> (regionInfo.x & 7);
|
|
var offset0 = regionInfo.y * rowSize + (regionInfo.x >> 3);
|
|
var i, j, mask, offset;
|
|
|
|
switch (combinationOperator) {
|
|
case 0:
|
|
for (i = 0; i < height; i++) {
|
|
mask = mask0;
|
|
offset = offset0;
|
|
|
|
for (j = 0; j < width; j++) {
|
|
if (bitmap[i][j]) {
|
|
buffer[offset] |= mask;
|
|
}
|
|
|
|
mask >>= 1;
|
|
|
|
if (!mask) {
|
|
mask = 128;
|
|
offset++;
|
|
}
|
|
}
|
|
|
|
offset0 += rowSize;
|
|
}
|
|
|
|
break;
|
|
|
|
case 2:
|
|
for (i = 0; i < height; i++) {
|
|
mask = mask0;
|
|
offset = offset0;
|
|
|
|
for (j = 0; j < width; j++) {
|
|
if (bitmap[i][j]) {
|
|
buffer[offset] ^= mask;
|
|
}
|
|
|
|
mask >>= 1;
|
|
|
|
if (!mask) {
|
|
mask = 128;
|
|
offset++;
|
|
}
|
|
}
|
|
|
|
offset0 += rowSize;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
throw new Jbig2Error(`operator ${combinationOperator} is not supported`);
|
|
}
|
|
},
|
|
onImmediateGenericRegion: function SimpleSegmentVisitor_onImmediateGenericRegion(region, data, start, end) {
|
|
var regionInfo = region.info;
|
|
var decodingContext = new DecodingContext(data, start, end);
|
|
var bitmap = decodeBitmap(region.mmr, regionInfo.width, regionInfo.height, region.template, region.prediction, null, region.at, decodingContext);
|
|
this.drawBitmap(regionInfo, bitmap);
|
|
},
|
|
onImmediateLosslessGenericRegion: function SimpleSegmentVisitor_onImmediateLosslessGenericRegion() {
|
|
this.onImmediateGenericRegion.apply(this, arguments);
|
|
},
|
|
onSymbolDictionary: function SimpleSegmentVisitor_onSymbolDictionary(dictionary, currentSegment, referredSegments, data, start, end) {
|
|
let huffmanTables, huffmanInput;
|
|
|
|
if (dictionary.huffman) {
|
|
huffmanTables = getSymbolDictionaryHuffmanTables(dictionary, referredSegments, this.customTables);
|
|
huffmanInput = new Reader(data, start, end);
|
|
}
|
|
|
|
var symbols = this.symbols;
|
|
|
|
if (!symbols) {
|
|
this.symbols = symbols = {};
|
|
}
|
|
|
|
var inputSymbols = [];
|
|
|
|
for (var i = 0, ii = referredSegments.length; i < ii; i++) {
|
|
const referredSymbols = symbols[referredSegments[i]];
|
|
|
|
if (referredSymbols) {
|
|
inputSymbols = inputSymbols.concat(referredSymbols);
|
|
}
|
|
}
|
|
|
|
var decodingContext = new DecodingContext(data, start, end);
|
|
symbols[currentSegment] = decodeSymbolDictionary(dictionary.huffman, dictionary.refinement, inputSymbols, dictionary.numberOfNewSymbols, dictionary.numberOfExportedSymbols, huffmanTables, dictionary.template, dictionary.at, dictionary.refinementTemplate, dictionary.refinementAt, decodingContext, huffmanInput);
|
|
},
|
|
onImmediateTextRegion: function SimpleSegmentVisitor_onImmediateTextRegion(region, referredSegments, data, start, end) {
|
|
var regionInfo = region.info;
|
|
let huffmanTables, huffmanInput;
|
|
var symbols = this.symbols;
|
|
var inputSymbols = [];
|
|
|
|
for (var i = 0, ii = referredSegments.length; i < ii; i++) {
|
|
const referredSymbols = symbols[referredSegments[i]];
|
|
|
|
if (referredSymbols) {
|
|
inputSymbols = inputSymbols.concat(referredSymbols);
|
|
}
|
|
}
|
|
|
|
var symbolCodeLength = (0, _core_utils.log2)(inputSymbols.length);
|
|
|
|
if (region.huffman) {
|
|
huffmanInput = new Reader(data, start, end);
|
|
huffmanTables = getTextRegionHuffmanTables(region, referredSegments, this.customTables, inputSymbols.length, huffmanInput);
|
|
}
|
|
|
|
var decodingContext = new DecodingContext(data, start, end);
|
|
var bitmap = decodeTextRegion(region.huffman, region.refinement, regionInfo.width, regionInfo.height, region.defaultPixelValue, region.numberOfSymbolInstances, region.stripSize, inputSymbols, symbolCodeLength, region.transposed, region.dsOffset, region.referenceCorner, region.combinationOperator, huffmanTables, region.refinementTemplate, region.refinementAt, decodingContext, region.logStripSize, huffmanInput);
|
|
this.drawBitmap(regionInfo, bitmap);
|
|
},
|
|
onImmediateLosslessTextRegion: function SimpleSegmentVisitor_onImmediateLosslessTextRegion() {
|
|
this.onImmediateTextRegion.apply(this, arguments);
|
|
},
|
|
|
|
onPatternDictionary(dictionary, currentSegment, data, start, end) {
|
|
let patterns = this.patterns;
|
|
|
|
if (!patterns) {
|
|
this.patterns = patterns = {};
|
|
}
|
|
|
|
const decodingContext = new DecodingContext(data, start, end);
|
|
patterns[currentSegment] = decodePatternDictionary(dictionary.mmr, dictionary.patternWidth, dictionary.patternHeight, dictionary.maxPatternIndex, dictionary.template, decodingContext);
|
|
},
|
|
|
|
onImmediateHalftoneRegion(region, referredSegments, data, start, end) {
|
|
const patterns = this.patterns[referredSegments[0]];
|
|
const regionInfo = region.info;
|
|
const decodingContext = new DecodingContext(data, start, end);
|
|
const bitmap = decodeHalftoneRegion(region.mmr, patterns, region.template, regionInfo.width, regionInfo.height, region.defaultPixelValue, region.enableSkip, region.combinationOperator, region.gridWidth, region.gridHeight, region.gridOffsetX, region.gridOffsetY, region.gridVectorX, region.gridVectorY, decodingContext);
|
|
this.drawBitmap(regionInfo, bitmap);
|
|
},
|
|
|
|
onImmediateLosslessHalftoneRegion() {
|
|
this.onImmediateHalftoneRegion.apply(this, arguments);
|
|
},
|
|
|
|
onTables(currentSegment, data, start, end) {
|
|
let customTables = this.customTables;
|
|
|
|
if (!customTables) {
|
|
this.customTables = customTables = {};
|
|
}
|
|
|
|
customTables[currentSegment] = decodeTablesSegment(data, start, end);
|
|
}
|
|
|
|
};
|
|
|
|
function HuffmanLine(lineData) {
|
|
if (lineData.length === 2) {
|
|
this.isOOB = true;
|
|
this.rangeLow = 0;
|
|
this.prefixLength = lineData[0];
|
|
this.rangeLength = 0;
|
|
this.prefixCode = lineData[1];
|
|
this.isLowerRange = false;
|
|
} else {
|
|
this.isOOB = false;
|
|
this.rangeLow = lineData[0];
|
|
this.prefixLength = lineData[1];
|
|
this.rangeLength = lineData[2];
|
|
this.prefixCode = lineData[3];
|
|
this.isLowerRange = lineData[4] === "lower";
|
|
}
|
|
}
|
|
|
|
function HuffmanTreeNode(line) {
|
|
this.children = [];
|
|
|
|
if (line) {
|
|
this.isLeaf = true;
|
|
this.rangeLength = line.rangeLength;
|
|
this.rangeLow = line.rangeLow;
|
|
this.isLowerRange = line.isLowerRange;
|
|
this.isOOB = line.isOOB;
|
|
} else {
|
|
this.isLeaf = false;
|
|
}
|
|
}
|
|
|
|
HuffmanTreeNode.prototype = {
|
|
buildTree(line, shift) {
|
|
const bit = line.prefixCode >> shift & 1;
|
|
|
|
if (shift <= 0) {
|
|
this.children[bit] = new HuffmanTreeNode(line);
|
|
} else {
|
|
let node = this.children[bit];
|
|
|
|
if (!node) {
|
|
this.children[bit] = node = new HuffmanTreeNode(null);
|
|
}
|
|
|
|
node.buildTree(line, shift - 1);
|
|
}
|
|
},
|
|
|
|
decodeNode(reader) {
|
|
if (this.isLeaf) {
|
|
if (this.isOOB) {
|
|
return null;
|
|
}
|
|
|
|
const htOffset = reader.readBits(this.rangeLength);
|
|
return this.rangeLow + (this.isLowerRange ? -htOffset : htOffset);
|
|
}
|
|
|
|
const node = this.children[reader.readBit()];
|
|
|
|
if (!node) {
|
|
throw new Jbig2Error("invalid Huffman data");
|
|
}
|
|
|
|
return node.decodeNode(reader);
|
|
}
|
|
|
|
};
|
|
|
|
function HuffmanTable(lines, prefixCodesDone) {
|
|
if (!prefixCodesDone) {
|
|
this.assignPrefixCodes(lines);
|
|
}
|
|
|
|
this.rootNode = new HuffmanTreeNode(null);
|
|
|
|
for (let i = 0, ii = lines.length; i < ii; i++) {
|
|
const line = lines[i];
|
|
|
|
if (line.prefixLength > 0) {
|
|
this.rootNode.buildTree(line, line.prefixLength - 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
HuffmanTable.prototype = {
|
|
decode(reader) {
|
|
return this.rootNode.decodeNode(reader);
|
|
},
|
|
|
|
assignPrefixCodes(lines) {
|
|
const linesLength = lines.length;
|
|
let prefixLengthMax = 0;
|
|
|
|
for (let i = 0; i < linesLength; i++) {
|
|
prefixLengthMax = Math.max(prefixLengthMax, lines[i].prefixLength);
|
|
}
|
|
|
|
const histogram = new Uint32Array(prefixLengthMax + 1);
|
|
|
|
for (let i = 0; i < linesLength; i++) {
|
|
histogram[lines[i].prefixLength]++;
|
|
}
|
|
|
|
let currentLength = 1,
|
|
firstCode = 0,
|
|
currentCode,
|
|
currentTemp,
|
|
line;
|
|
histogram[0] = 0;
|
|
|
|
while (currentLength <= prefixLengthMax) {
|
|
firstCode = firstCode + histogram[currentLength - 1] << 1;
|
|
currentCode = firstCode;
|
|
currentTemp = 0;
|
|
|
|
while (currentTemp < linesLength) {
|
|
line = lines[currentTemp];
|
|
|
|
if (line.prefixLength === currentLength) {
|
|
line.prefixCode = currentCode;
|
|
currentCode++;
|
|
}
|
|
|
|
currentTemp++;
|
|
}
|
|
|
|
currentLength++;
|
|
}
|
|
}
|
|
|
|
};
|
|
|
|
function decodeTablesSegment(data, start, end) {
|
|
const flags = data[start];
|
|
const lowestValue = (0, _core_utils.readUint32)(data, start + 1) & 0xffffffff;
|
|
const highestValue = (0, _core_utils.readUint32)(data, start + 5) & 0xffffffff;
|
|
const reader = new Reader(data, start + 9, end);
|
|
const prefixSizeBits = (flags >> 1 & 7) + 1;
|
|
const rangeSizeBits = (flags >> 4 & 7) + 1;
|
|
const lines = [];
|
|
let prefixLength,
|
|
rangeLength,
|
|
currentRangeLow = lowestValue;
|
|
|
|
do {
|
|
prefixLength = reader.readBits(prefixSizeBits);
|
|
rangeLength = reader.readBits(rangeSizeBits);
|
|
lines.push(new HuffmanLine([currentRangeLow, prefixLength, rangeLength, 0]));
|
|
currentRangeLow += 1 << rangeLength;
|
|
} while (currentRangeLow < highestValue);
|
|
|
|
prefixLength = reader.readBits(prefixSizeBits);
|
|
lines.push(new HuffmanLine([lowestValue - 1, prefixLength, 32, 0, "lower"]));
|
|
prefixLength = reader.readBits(prefixSizeBits);
|
|
lines.push(new HuffmanLine([highestValue, prefixLength, 32, 0]));
|
|
|
|
if (flags & 1) {
|
|
prefixLength = reader.readBits(prefixSizeBits);
|
|
lines.push(new HuffmanLine([prefixLength, 0]));
|
|
}
|
|
|
|
return new HuffmanTable(lines, false);
|
|
}
|
|
|
|
const standardTablesCache = {};
|
|
|
|
function getStandardTable(number) {
|
|
let table = standardTablesCache[number];
|
|
|
|
if (table) {
|
|
return table;
|
|
}
|
|
|
|
let lines;
|
|
|
|
switch (number) {
|
|
case 1:
|
|
lines = [[0, 1, 4, 0x0], [16, 2, 8, 0x2], [272, 3, 16, 0x6], [65808, 3, 32, 0x7]];
|
|
break;
|
|
|
|
case 2:
|
|
lines = [[0, 1, 0, 0x0], [1, 2, 0, 0x2], [2, 3, 0, 0x6], [3, 4, 3, 0xe], [11, 5, 6, 0x1e], [75, 6, 32, 0x3e], [6, 0x3f]];
|
|
break;
|
|
|
|
case 3:
|
|
lines = [[-256, 8, 8, 0xfe], [0, 1, 0, 0x0], [1, 2, 0, 0x2], [2, 3, 0, 0x6], [3, 4, 3, 0xe], [11, 5, 6, 0x1e], [-257, 8, 32, 0xff, "lower"], [75, 7, 32, 0x7e], [6, 0x3e]];
|
|
break;
|
|
|
|
case 4:
|
|
lines = [[1, 1, 0, 0x0], [2, 2, 0, 0x2], [3, 3, 0, 0x6], [4, 4, 3, 0xe], [12, 5, 6, 0x1e], [76, 5, 32, 0x1f]];
|
|
break;
|
|
|
|
case 5:
|
|
lines = [[-255, 7, 8, 0x7e], [1, 1, 0, 0x0], [2, 2, 0, 0x2], [3, 3, 0, 0x6], [4, 4, 3, 0xe], [12, 5, 6, 0x1e], [-256, 7, 32, 0x7f, "lower"], [76, 6, 32, 0x3e]];
|
|
break;
|
|
|
|
case 6:
|
|
lines = [[-2048, 5, 10, 0x1c], [-1024, 4, 9, 0x8], [-512, 4, 8, 0x9], [-256, 4, 7, 0xa], [-128, 5, 6, 0x1d], [-64, 5, 5, 0x1e], [-32, 4, 5, 0xb], [0, 2, 7, 0x0], [128, 3, 7, 0x2], [256, 3, 8, 0x3], [512, 4, 9, 0xc], [1024, 4, 10, 0xd], [-2049, 6, 32, 0x3e, "lower"], [2048, 6, 32, 0x3f]];
|
|
break;
|
|
|
|
case 7:
|
|
lines = [[-1024, 4, 9, 0x8], [-512, 3, 8, 0x0], [-256, 4, 7, 0x9], [-128, 5, 6, 0x1a], [-64, 5, 5, 0x1b], [-32, 4, 5, 0xa], [0, 4, 5, 0xb], [32, 5, 5, 0x1c], [64, 5, 6, 0x1d], [128, 4, 7, 0xc], [256, 3, 8, 0x1], [512, 3, 9, 0x2], [1024, 3, 10, 0x3], [-1025, 5, 32, 0x1e, "lower"], [2048, 5, 32, 0x1f]];
|
|
break;
|
|
|
|
case 8:
|
|
lines = [[-15, 8, 3, 0xfc], [-7, 9, 1, 0x1fc], [-5, 8, 1, 0xfd], [-3, 9, 0, 0x1fd], [-2, 7, 0, 0x7c], [-1, 4, 0, 0xa], [0, 2, 1, 0x0], [2, 5, 0, 0x1a], [3, 6, 0, 0x3a], [4, 3, 4, 0x4], [20, 6, 1, 0x3b], [22, 4, 4, 0xb], [38, 4, 5, 0xc], [70, 5, 6, 0x1b], [134, 5, 7, 0x1c], [262, 6, 7, 0x3c], [390, 7, 8, 0x7d], [646, 6, 10, 0x3d], [-16, 9, 32, 0x1fe, "lower"], [1670, 9, 32, 0x1ff], [2, 0x1]];
|
|
break;
|
|
|
|
case 9:
|
|
lines = [[-31, 8, 4, 0xfc], [-15, 9, 2, 0x1fc], [-11, 8, 2, 0xfd], [-7, 9, 1, 0x1fd], [-5, 7, 1, 0x7c], [-3, 4, 1, 0xa], [-1, 3, 1, 0x2], [1, 3, 1, 0x3], [3, 5, 1, 0x1a], [5, 6, 1, 0x3a], [7, 3, 5, 0x4], [39, 6, 2, 0x3b], [43, 4, 5, 0xb], [75, 4, 6, 0xc], [139, 5, 7, 0x1b], [267, 5, 8, 0x1c], [523, 6, 8, 0x3c], [779, 7, 9, 0x7d], [1291, 6, 11, 0x3d], [-32, 9, 32, 0x1fe, "lower"], [3339, 9, 32, 0x1ff], [2, 0x0]];
|
|
break;
|
|
|
|
case 10:
|
|
lines = [[-21, 7, 4, 0x7a], [-5, 8, 0, 0xfc], [-4, 7, 0, 0x7b], [-3, 5, 0, 0x18], [-2, 2, 2, 0x0], [2, 5, 0, 0x19], [3, 6, 0, 0x36], [4, 7, 0, 0x7c], [5, 8, 0, 0xfd], [6, 2, 6, 0x1], [70, 5, 5, 0x1a], [102, 6, 5, 0x37], [134, 6, 6, 0x38], [198, 6, 7, 0x39], [326, 6, 8, 0x3a], [582, 6, 9, 0x3b], [1094, 6, 10, 0x3c], [2118, 7, 11, 0x7d], [-22, 8, 32, 0xfe, "lower"], [4166, 8, 32, 0xff], [2, 0x2]];
|
|
break;
|
|
|
|
case 11:
|
|
lines = [[1, 1, 0, 0x0], [2, 2, 1, 0x2], [4, 4, 0, 0xc], [5, 4, 1, 0xd], [7, 5, 1, 0x1c], [9, 5, 2, 0x1d], [13, 6, 2, 0x3c], [17, 7, 2, 0x7a], [21, 7, 3, 0x7b], [29, 7, 4, 0x7c], [45, 7, 5, 0x7d], [77, 7, 6, 0x7e], [141, 7, 32, 0x7f]];
|
|
break;
|
|
|
|
case 12:
|
|
lines = [[1, 1, 0, 0x0], [2, 2, 0, 0x2], [3, 3, 1, 0x6], [5, 5, 0, 0x1c], [6, 5, 1, 0x1d], [8, 6, 1, 0x3c], [10, 7, 0, 0x7a], [11, 7, 1, 0x7b], [13, 7, 2, 0x7c], [17, 7, 3, 0x7d], [25, 7, 4, 0x7e], [41, 8, 5, 0xfe], [73, 8, 32, 0xff]];
|
|
break;
|
|
|
|
case 13:
|
|
lines = [[1, 1, 0, 0x0], [2, 3, 0, 0x4], [3, 4, 0, 0xc], [4, 5, 0, 0x1c], [5, 4, 1, 0xd], [7, 3, 3, 0x5], [15, 6, 1, 0x3a], [17, 6, 2, 0x3b], [21, 6, 3, 0x3c], [29, 6, 4, 0x3d], [45, 6, 5, 0x3e], [77, 7, 6, 0x7e], [141, 7, 32, 0x7f]];
|
|
break;
|
|
|
|
case 14:
|
|
lines = [[-2, 3, 0, 0x4], [-1, 3, 0, 0x5], [0, 1, 0, 0x0], [1, 3, 0, 0x6], [2, 3, 0, 0x7]];
|
|
break;
|
|
|
|
case 15:
|
|
lines = [[-24, 7, 4, 0x7c], [-8, 6, 2, 0x3c], [-4, 5, 1, 0x1c], [-2, 4, 0, 0xc], [-1, 3, 0, 0x4], [0, 1, 0, 0x0], [1, 3, 0, 0x5], [2, 4, 0, 0xd], [3, 5, 1, 0x1d], [5, 6, 2, 0x3d], [9, 7, 4, 0x7d], [-25, 7, 32, 0x7e, "lower"], [25, 7, 32, 0x7f]];
|
|
break;
|
|
|
|
default:
|
|
throw new Jbig2Error(`standard table B.${number} does not exist`);
|
|
}
|
|
|
|
for (let i = 0, ii = lines.length; i < ii; i++) {
|
|
lines[i] = new HuffmanLine(lines[i]);
|
|
}
|
|
|
|
table = new HuffmanTable(lines, true);
|
|
standardTablesCache[number] = table;
|
|
return table;
|
|
}
|
|
|
|
function Reader(data, start, end) {
|
|
this.data = data;
|
|
this.start = start;
|
|
this.end = end;
|
|
this.position = start;
|
|
this.shift = -1;
|
|
this.currentByte = 0;
|
|
}
|
|
|
|
Reader.prototype = {
|
|
readBit() {
|
|
if (this.shift < 0) {
|
|
if (this.position >= this.end) {
|
|
throw new Jbig2Error("end of data while reading bit");
|
|
}
|
|
|
|
this.currentByte = this.data[this.position++];
|
|
this.shift = 7;
|
|
}
|
|
|
|
const bit = this.currentByte >> this.shift & 1;
|
|
this.shift--;
|
|
return bit;
|
|
},
|
|
|
|
readBits(numBits) {
|
|
let result = 0,
|
|
i;
|
|
|
|
for (i = numBits - 1; i >= 0; i--) {
|
|
result |= this.readBit() << i;
|
|
}
|
|
|
|
return result;
|
|
},
|
|
|
|
byteAlign() {
|
|
this.shift = -1;
|
|
},
|
|
|
|
next() {
|
|
if (this.position >= this.end) {
|
|
return -1;
|
|
}
|
|
|
|
return this.data[this.position++];
|
|
}
|
|
|
|
};
|
|
|
|
function getCustomHuffmanTable(index, referredTo, customTables) {
|
|
let currentIndex = 0;
|
|
|
|
for (let i = 0, ii = referredTo.length; i < ii; i++) {
|
|
const table = customTables[referredTo[i]];
|
|
|
|
if (table) {
|
|
if (index === currentIndex) {
|
|
return table;
|
|
}
|
|
|
|
currentIndex++;
|
|
}
|
|
}
|
|
|
|
throw new Jbig2Error("can't find custom Huffman table");
|
|
}
|
|
|
|
function getTextRegionHuffmanTables(textRegion, referredTo, customTables, numberOfSymbols, reader) {
|
|
const codes = [];
|
|
|
|
for (let i = 0; i <= 34; i++) {
|
|
const codeLength = reader.readBits(4);
|
|
codes.push(new HuffmanLine([i, codeLength, 0, 0]));
|
|
}
|
|
|
|
const runCodesTable = new HuffmanTable(codes, false);
|
|
codes.length = 0;
|
|
|
|
for (let i = 0; i < numberOfSymbols;) {
|
|
const codeLength = runCodesTable.decode(reader);
|
|
|
|
if (codeLength >= 32) {
|
|
let repeatedLength, numberOfRepeats, j;
|
|
|
|
switch (codeLength) {
|
|
case 32:
|
|
if (i === 0) {
|
|
throw new Jbig2Error("no previous value in symbol ID table");
|
|
}
|
|
|
|
numberOfRepeats = reader.readBits(2) + 3;
|
|
repeatedLength = codes[i - 1].prefixLength;
|
|
break;
|
|
|
|
case 33:
|
|
numberOfRepeats = reader.readBits(3) + 3;
|
|
repeatedLength = 0;
|
|
break;
|
|
|
|
case 34:
|
|
numberOfRepeats = reader.readBits(7) + 11;
|
|
repeatedLength = 0;
|
|
break;
|
|
|
|
default:
|
|
throw new Jbig2Error("invalid code length in symbol ID table");
|
|
}
|
|
|
|
for (j = 0; j < numberOfRepeats; j++) {
|
|
codes.push(new HuffmanLine([i, repeatedLength, 0, 0]));
|
|
i++;
|
|
}
|
|
} else {
|
|
codes.push(new HuffmanLine([i, codeLength, 0, 0]));
|
|
i++;
|
|
}
|
|
}
|
|
|
|
reader.byteAlign();
|
|
const symbolIDTable = new HuffmanTable(codes, false);
|
|
let customIndex = 0,
|
|
tableFirstS,
|
|
tableDeltaS,
|
|
tableDeltaT;
|
|
|
|
switch (textRegion.huffmanFS) {
|
|
case 0:
|
|
case 1:
|
|
tableFirstS = getStandardTable(textRegion.huffmanFS + 6);
|
|
break;
|
|
|
|
case 3:
|
|
tableFirstS = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
|
customIndex++;
|
|
break;
|
|
|
|
default:
|
|
throw new Jbig2Error("invalid Huffman FS selector");
|
|
}
|
|
|
|
switch (textRegion.huffmanDS) {
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
tableDeltaS = getStandardTable(textRegion.huffmanDS + 8);
|
|
break;
|
|
|
|
case 3:
|
|
tableDeltaS = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
|
customIndex++;
|
|
break;
|
|
|
|
default:
|
|
throw new Jbig2Error("invalid Huffman DS selector");
|
|
}
|
|
|
|
switch (textRegion.huffmanDT) {
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
tableDeltaT = getStandardTable(textRegion.huffmanDT + 11);
|
|
break;
|
|
|
|
case 3:
|
|
tableDeltaT = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
|
customIndex++;
|
|
break;
|
|
|
|
default:
|
|
throw new Jbig2Error("invalid Huffman DT selector");
|
|
}
|
|
|
|
if (textRegion.refinement) {
|
|
throw new Jbig2Error("refinement with Huffman is not supported");
|
|
}
|
|
|
|
return {
|
|
symbolIDTable,
|
|
tableFirstS,
|
|
tableDeltaS,
|
|
tableDeltaT
|
|
};
|
|
}
|
|
|
|
function getSymbolDictionaryHuffmanTables(dictionary, referredTo, customTables) {
|
|
let customIndex = 0,
|
|
tableDeltaHeight,
|
|
tableDeltaWidth;
|
|
|
|
switch (dictionary.huffmanDHSelector) {
|
|
case 0:
|
|
case 1:
|
|
tableDeltaHeight = getStandardTable(dictionary.huffmanDHSelector + 4);
|
|
break;
|
|
|
|
case 3:
|
|
tableDeltaHeight = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
|
customIndex++;
|
|
break;
|
|
|
|
default:
|
|
throw new Jbig2Error("invalid Huffman DH selector");
|
|
}
|
|
|
|
switch (dictionary.huffmanDWSelector) {
|
|
case 0:
|
|
case 1:
|
|
tableDeltaWidth = getStandardTable(dictionary.huffmanDWSelector + 2);
|
|
break;
|
|
|
|
case 3:
|
|
tableDeltaWidth = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
|
customIndex++;
|
|
break;
|
|
|
|
default:
|
|
throw new Jbig2Error("invalid Huffman DW selector");
|
|
}
|
|
|
|
let tableBitmapSize, tableAggregateInstances;
|
|
|
|
if (dictionary.bitmapSizeSelector) {
|
|
tableBitmapSize = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
|
customIndex++;
|
|
} else {
|
|
tableBitmapSize = getStandardTable(1);
|
|
}
|
|
|
|
if (dictionary.aggregationInstancesSelector) {
|
|
tableAggregateInstances = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
|
} else {
|
|
tableAggregateInstances = getStandardTable(1);
|
|
}
|
|
|
|
return {
|
|
tableDeltaHeight,
|
|
tableDeltaWidth,
|
|
tableBitmapSize,
|
|
tableAggregateInstances
|
|
};
|
|
}
|
|
|
|
function readUncompressedBitmap(reader, width, height) {
|
|
const bitmap = [];
|
|
|
|
for (let y = 0; y < height; y++) {
|
|
const row = new Uint8Array(width);
|
|
bitmap.push(row);
|
|
|
|
for (let x = 0; x < width; x++) {
|
|
row[x] = reader.readBit();
|
|
}
|
|
|
|
reader.byteAlign();
|
|
}
|
|
|
|
return bitmap;
|
|
}
|
|
|
|
function decodeMMRBitmap(input, width, height, endOfBlock) {
|
|
const params = {
|
|
K: -1,
|
|
Columns: width,
|
|
Rows: height,
|
|
BlackIs1: true,
|
|
EndOfBlock: endOfBlock
|
|
};
|
|
const decoder = new _ccitt.CCITTFaxDecoder(input, params);
|
|
const bitmap = [];
|
|
let currentByte,
|
|
eof = false;
|
|
|
|
for (let y = 0; y < height; y++) {
|
|
const row = new Uint8Array(width);
|
|
bitmap.push(row);
|
|
let shift = -1;
|
|
|
|
for (let x = 0; x < width; x++) {
|
|
if (shift < 0) {
|
|
currentByte = decoder.readNextChar();
|
|
|
|
if (currentByte === -1) {
|
|
currentByte = 0;
|
|
eof = true;
|
|
}
|
|
|
|
shift = 7;
|
|
}
|
|
|
|
row[x] = currentByte >> shift & 1;
|
|
shift--;
|
|
}
|
|
}
|
|
|
|
if (endOfBlock && !eof) {
|
|
const lookForEOFLimit = 5;
|
|
|
|
for (let i = 0; i < lookForEOFLimit; i++) {
|
|
if (decoder.readNextChar() === -1) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return bitmap;
|
|
}
|
|
|
|
function Jbig2Image() {}
|
|
|
|
Jbig2Image.prototype = {
|
|
parseChunks(chunks) {
|
|
return parseJbig2Chunks(chunks);
|
|
},
|
|
|
|
parse(data) {
|
|
const {
|
|
imgData,
|
|
width,
|
|
height
|
|
} = parseJbig2(data);
|
|
this.width = width;
|
|
this.height = height;
|
|
return imgData;
|
|
}
|
|
|
|
};
|
|
return Jbig2Image;
|
|
}();
|
|
|
|
exports.Jbig2Image = Jbig2Image;
|
|
|
|
/***/ }),
|
|
/* 5 */
|
|
/***/ (function(module, exports, __w_pdfjs_require__) {
|
|
|
|
"use strict";
|
|
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.getLookupTableFactory = getLookupTableFactory;
|
|
exports.getInheritableProperty = getInheritableProperty;
|
|
exports.toRomanNumerals = toRomanNumerals;
|
|
exports.log2 = log2;
|
|
exports.readInt8 = readInt8;
|
|
exports.readUint16 = readUint16;
|
|
exports.readUint32 = readUint32;
|
|
exports.isWhiteSpace = isWhiteSpace;
|
|
exports.XRefParseException = exports.XRefEntryException = exports.MissingDataException = void 0;
|
|
|
|
var _util = __w_pdfjs_require__(1);
|
|
|
|
function getLookupTableFactory(initializer) {
|
|
let lookup;
|
|
return function () {
|
|
if (initializer) {
|
|
lookup = Object.create(null);
|
|
initializer(lookup);
|
|
initializer = null;
|
|
}
|
|
|
|
return lookup;
|
|
};
|
|
}
|
|
|
|
class MissingDataException extends _util.BaseException {
|
|
constructor(begin, end) {
|
|
super(`Missing data [${begin}, ${end})`);
|
|
this.begin = begin;
|
|
this.end = end;
|
|
}
|
|
|
|
}
|
|
|
|
exports.MissingDataException = MissingDataException;
|
|
|
|
class XRefEntryException extends _util.BaseException {}
|
|
|
|
exports.XRefEntryException = XRefEntryException;
|
|
|
|
class XRefParseException extends _util.BaseException {}
|
|
|
|
exports.XRefParseException = XRefParseException;
|
|
|
|
function getInheritableProperty({
|
|
dict,
|
|
key,
|
|
getArray = false,
|
|
stopWhenFound = true
|
|
}) {
|
|
const LOOP_LIMIT = 100;
|
|
let loopCount = 0;
|
|
let values;
|
|
|
|
while (dict) {
|
|
const value = getArray ? dict.getArray(key) : dict.get(key);
|
|
|
|
if (value !== undefined) {
|
|
if (stopWhenFound) {
|
|
return value;
|
|
}
|
|
|
|
if (!values) {
|
|
values = [];
|
|
}
|
|
|
|
values.push(value);
|
|
}
|
|
|
|
if (++loopCount > LOOP_LIMIT) {
|
|
(0, _util.warn)(`getInheritableProperty: maximum loop count exceeded for "${key}"`);
|
|
break;
|
|
}
|
|
|
|
dict = dict.get("Parent");
|
|
}
|
|
|
|
return values;
|
|
}
|
|
|
|
const ROMAN_NUMBER_MAP = ["", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM", "", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC", "", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"];
|
|
|
|
function toRomanNumerals(number, lowerCase = false) {
|
|
(0, _util.assert)(Number.isInteger(number) && number > 0, "The number should be a positive integer.");
|
|
const romanBuf = [];
|
|
let pos;
|
|
|
|
while (number >= 1000) {
|
|
number -= 1000;
|
|
romanBuf.push("M");
|
|
}
|
|
|
|
pos = number / 100 | 0;
|
|
number %= 100;
|
|
romanBuf.push(ROMAN_NUMBER_MAP[pos]);
|
|
pos = number / 10 | 0;
|
|
number %= 10;
|
|
romanBuf.push(ROMAN_NUMBER_MAP[10 + pos]);
|
|
romanBuf.push(ROMAN_NUMBER_MAP[20 + number]);
|
|
const romanStr = romanBuf.join("");
|
|
return lowerCase ? romanStr.toLowerCase() : romanStr;
|
|
}
|
|
|
|
function log2(x) {
|
|
if (x <= 0) {
|
|
return 0;
|
|
}
|
|
|
|
return Math.ceil(Math.log2(x));
|
|
}
|
|
|
|
function readInt8(data, offset) {
|
|
return data[offset] << 24 >> 24;
|
|
}
|
|
|
|
function readUint16(data, offset) {
|
|
return data[offset] << 8 | data[offset + 1];
|
|
}
|
|
|
|
function readUint32(data, offset) {
|
|
return (data[offset] << 24 | data[offset + 1] << 16 | data[offset + 2] << 8 | data[offset + 3]) >>> 0;
|
|
}
|
|
|
|
function isWhiteSpace(ch) {
|
|
return ch === 0x20 || ch === 0x09 || ch === 0x0d || ch === 0x0a;
|
|
}
|
|
|
|
/***/ }),
|
|
/* 6 */
|
|
/***/ (function(module, exports, __w_pdfjs_require__) {
|
|
|
|
"use strict";
|
|
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.ArithmeticDecoder = void 0;
|
|
const QeTable = [{
|
|
qe: 0x5601,
|
|
nmps: 1,
|
|
nlps: 1,
|
|
switchFlag: 1
|
|
}, {
|
|
qe: 0x3401,
|
|
nmps: 2,
|
|
nlps: 6,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x1801,
|
|
nmps: 3,
|
|
nlps: 9,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0ac1,
|
|
nmps: 4,
|
|
nlps: 12,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0521,
|
|
nmps: 5,
|
|
nlps: 29,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0221,
|
|
nmps: 38,
|
|
nlps: 33,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x5601,
|
|
nmps: 7,
|
|
nlps: 6,
|
|
switchFlag: 1
|
|
}, {
|
|
qe: 0x5401,
|
|
nmps: 8,
|
|
nlps: 14,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x4801,
|
|
nmps: 9,
|
|
nlps: 14,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x3801,
|
|
nmps: 10,
|
|
nlps: 14,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x3001,
|
|
nmps: 11,
|
|
nlps: 17,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x2401,
|
|
nmps: 12,
|
|
nlps: 18,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x1c01,
|
|
nmps: 13,
|
|
nlps: 20,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x1601,
|
|
nmps: 29,
|
|
nlps: 21,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x5601,
|
|
nmps: 15,
|
|
nlps: 14,
|
|
switchFlag: 1
|
|
}, {
|
|
qe: 0x5401,
|
|
nmps: 16,
|
|
nlps: 14,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x5101,
|
|
nmps: 17,
|
|
nlps: 15,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x4801,
|
|
nmps: 18,
|
|
nlps: 16,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x3801,
|
|
nmps: 19,
|
|
nlps: 17,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x3401,
|
|
nmps: 20,
|
|
nlps: 18,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x3001,
|
|
nmps: 21,
|
|
nlps: 19,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x2801,
|
|
nmps: 22,
|
|
nlps: 19,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x2401,
|
|
nmps: 23,
|
|
nlps: 20,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x2201,
|
|
nmps: 24,
|
|
nlps: 21,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x1c01,
|
|
nmps: 25,
|
|
nlps: 22,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x1801,
|
|
nmps: 26,
|
|
nlps: 23,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x1601,
|
|
nmps: 27,
|
|
nlps: 24,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x1401,
|
|
nmps: 28,
|
|
nlps: 25,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x1201,
|
|
nmps: 29,
|
|
nlps: 26,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x1101,
|
|
nmps: 30,
|
|
nlps: 27,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0ac1,
|
|
nmps: 31,
|
|
nlps: 28,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x09c1,
|
|
nmps: 32,
|
|
nlps: 29,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x08a1,
|
|
nmps: 33,
|
|
nlps: 30,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0521,
|
|
nmps: 34,
|
|
nlps: 31,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0441,
|
|
nmps: 35,
|
|
nlps: 32,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x02a1,
|
|
nmps: 36,
|
|
nlps: 33,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0221,
|
|
nmps: 37,
|
|
nlps: 34,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0141,
|
|
nmps: 38,
|
|
nlps: 35,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0111,
|
|
nmps: 39,
|
|
nlps: 36,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0085,
|
|
nmps: 40,
|
|
nlps: 37,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0049,
|
|
nmps: 41,
|
|
nlps: 38,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0025,
|
|
nmps: 42,
|
|
nlps: 39,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0015,
|
|
nmps: 43,
|
|
nlps: 40,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0009,
|
|
nmps: 44,
|
|
nlps: 41,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0005,
|
|
nmps: 45,
|
|
nlps: 42,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x0001,
|
|
nmps: 45,
|
|
nlps: 43,
|
|
switchFlag: 0
|
|
}, {
|
|
qe: 0x5601,
|
|
nmps: 46,
|
|
nlps: 46,
|
|
switchFlag: 0
|
|
}];
|
|
|
|
class ArithmeticDecoder {
|
|
constructor(data, start, end) {
|
|
this.data = data;
|
|
this.bp = start;
|
|
this.dataEnd = end;
|
|
this.chigh = data[start];
|
|
this.clow = 0;
|
|
this.byteIn();
|
|
this.chigh = this.chigh << 7 & 0xffff | this.clow >> 9 & 0x7f;
|
|
this.clow = this.clow << 7 & 0xffff;
|
|
this.ct -= 7;
|
|
this.a = 0x8000;
|
|
}
|
|
|
|
byteIn() {
|
|
const data = this.data;
|
|
let bp = this.bp;
|
|
|
|
if (data[bp] === 0xff) {
|
|
if (data[bp + 1] > 0x8f) {
|
|
this.clow += 0xff00;
|
|
this.ct = 8;
|
|
} else {
|
|
bp++;
|
|
this.clow += data[bp] << 9;
|
|
this.ct = 7;
|
|
this.bp = bp;
|
|
}
|
|
} else {
|
|
bp++;
|
|
this.clow += bp < this.dataEnd ? data[bp] << 8 : 0xff00;
|
|
this.ct = 8;
|
|
this.bp = bp;
|
|
}
|
|
|
|
if (this.clow > 0xffff) {
|
|
this.chigh += this.clow >> 16;
|
|
this.clow &= 0xffff;
|
|
}
|
|
}
|
|
|
|
readBit(contexts, pos) {
|
|
let cx_index = contexts[pos] >> 1,
|
|
cx_mps = contexts[pos] & 1;
|
|
const qeTableIcx = QeTable[cx_index];
|
|
const qeIcx = qeTableIcx.qe;
|
|
let d;
|
|
let a = this.a - qeIcx;
|
|
|
|
if (this.chigh < qeIcx) {
|
|
if (a < qeIcx) {
|
|
a = qeIcx;
|
|
d = cx_mps;
|
|
cx_index = qeTableIcx.nmps;
|
|
} else {
|
|
a = qeIcx;
|
|
d = 1 ^ cx_mps;
|
|
|
|
if (qeTableIcx.switchFlag === 1) {
|
|
cx_mps = d;
|
|
}
|
|
|
|
cx_index = qeTableIcx.nlps;
|
|
}
|
|
} else {
|
|
this.chigh -= qeIcx;
|
|
|
|
if ((a & 0x8000) !== 0) {
|
|
this.a = a;
|
|
return cx_mps;
|
|
}
|
|
|
|
if (a < qeIcx) {
|
|
d = 1 ^ cx_mps;
|
|
|
|
if (qeTableIcx.switchFlag === 1) {
|
|
cx_mps = d;
|
|
}
|
|
|
|
cx_index = qeTableIcx.nlps;
|
|
} else {
|
|
d = cx_mps;
|
|
cx_index = qeTableIcx.nmps;
|
|
}
|
|
}
|
|
|
|
do {
|
|
if (this.ct === 0) {
|
|
this.byteIn();
|
|
}
|
|
|
|
a <<= 1;
|
|
this.chigh = this.chigh << 1 & 0xffff | this.clow >> 15 & 1;
|
|
this.clow = this.clow << 1 & 0xffff;
|
|
this.ct--;
|
|
} while ((a & 0x8000) === 0);
|
|
|
|
this.a = a;
|
|
contexts[pos] = cx_index << 1 | cx_mps;
|
|
return d;
|
|
}
|
|
|
|
}
|
|
|
|
exports.ArithmeticDecoder = ArithmeticDecoder;
|
|
|
|
/***/ }),
|
|
/* 7 */
|
|
/***/ (function(module, exports, __w_pdfjs_require__) {
|
|
|
|
"use strict";
|
|
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.CCITTFaxDecoder = void 0;
|
|
|
|
var _util = __w_pdfjs_require__(1);
|
|
|
|
const CCITTFaxDecoder = function CCITTFaxDecoder() {
|
|
const ccittEOL = -2;
|
|
const ccittEOF = -1;
|
|
const twoDimPass = 0;
|
|
const twoDimHoriz = 1;
|
|
const twoDimVert0 = 2;
|
|
const twoDimVertR1 = 3;
|
|
const twoDimVertL1 = 4;
|
|
const twoDimVertR2 = 5;
|
|
const twoDimVertL2 = 6;
|
|
const twoDimVertR3 = 7;
|
|
const twoDimVertL3 = 8;
|
|
const twoDimTable = [[-1, -1], [-1, -1], [7, twoDimVertL3], [7, twoDimVertR3], [6, twoDimVertL2], [6, twoDimVertL2], [6, twoDimVertR2], [6, twoDimVertR2], [4, twoDimPass], [4, twoDimPass], [4, twoDimPass], [4, twoDimPass], [4, twoDimPass], [4, twoDimPass], [4, twoDimPass], [4, twoDimPass], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0]];
|
|
const whiteTable1 = [[-1, -1], [12, ccittEOL], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [11, 1792], [11, 1792], [12, 1984], [12, 2048], [12, 2112], [12, 2176], [12, 2240], [12, 2304], [11, 1856], [11, 1856], [11, 1920], [11, 1920], [12, 2368], [12, 2432], [12, 2496], [12, 2560]];
|
|
const whiteTable2 = [[-1, -1], [-1, -1], [-1, -1], [-1, -1], [8, 29], [8, 29], [8, 30], [8, 30], [8, 45], [8, 45], [8, 46], [8, 46], [7, 22], [7, 22], [7, 22], [7, 22], [7, 23], [7, 23], [7, 23], [7, 23], [8, 47], [8, 47], [8, 48], [8, 48], [6, 13], [6, 13], [6, 13], [6, 13], [6, 13], [6, 13], [6, 13], [6, 13], [7, 20], [7, 20], [7, 20], [7, 20], [8, 33], [8, 33], [8, 34], [8, 34], [8, 35], [8, 35], [8, 36], [8, 36], [8, 37], [8, 37], [8, 38], [8, 38], [7, 19], [7, 19], [7, 19], [7, 19], [8, 31], [8, 31], [8, 32], [8, 32], [6, 1], [6, 1], [6, 1], [6, 1], [6, 1], [6, 1], [6, 1], [6, 1], [6, 12], [6, 12], [6, 12], [6, 12], [6, 12], [6, 12], [6, 12], [6, 12], [8, 53], [8, 53], [8, 54], [8, 54], [7, 26], [7, 26], [7, 26], [7, 26], [8, 39], [8, 39], [8, 40], [8, 40], [8, 41], [8, 41], [8, 42], [8, 42], [8, 43], [8, 43], [8, 44], [8, 44], [7, 21], [7, 21], [7, 21], [7, 21], [7, 28], [7, 28], [7, 28], [7, 28], [8, 61], [8, 61], [8, 62], [8, 62], [8, 63], [8, 63], [8, 0], [8, 0], [8, 320], [8, 320], [8, 384], [8, 384], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [7, 27], [7, 27], [7, 27], [7, 27], [8, 59], [8, 59], [8, 60], [8, 60], [9, 1472], [9, 1536], [9, 1600], [9, 1728], [7, 18], [7, 18], [7, 18], [7, 18], [7, 24], [7, 24], [7, 24], [7, 24], [8, 49], [8, 49], [8, 50], [8, 50], [8, 51], [8, 51], [8, 52], [8, 52], [7, 25], [7, 25], [7, 25], [7, 25], [8, 55], [8, 55], [8, 56], [8, 56], [8, 57], [8, 57], [8, 58], [8, 58], [6, 192], [6, 192], [6, 192], [6, 192], [6, 192], [6, 192], [6, 192], [6, 192], [6, 1664], [6, 1664], [6, 1664], [6, 1664], [6, 1664], [6, 1664], [6, 1664], [6, 1664], [8, 448], [8, 448], [8, 512], [8, 512], [9, 704], [9, 768], [8, 640], [8, 640], [8, 576], [8, 576], [9, 832], [9, 896], [9, 960], [9, 1024], [9, 1088], [9, 1152], [9, 1216], [9, 1280], [9, 1344], [9, 1408], [7, 256], [7, 256], [7, 256], [7, 256], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [6, 16], [6, 16], [6, 16], [6, 16], [6, 16], [6, 16], [6, 16], [6, 16], [6, 17], [6, 17], [6, 17], [6, 17], [6, 17], [6, 17], [6, 17], [6, 17], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [6, 14], [6, 14], [6, 14], [6, 14], [6, 14], [6, 14], [6, 14], [6, 14], [6, 15], [6, 15], [6, 15], [6, 15], [6, 15], [6, 15], [6, 15], [6, 15], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7]];
|
|
const blackTable1 = [[-1, -1], [-1, -1], [12, ccittEOL], [12, ccittEOL], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [11, 1792], [11, 1792], [11, 1792], [11, 1792], [12, 1984], [12, 1984], [12, 2048], [12, 2048], [12, 2112], [12, 2112], [12, 2176], [12, 2176], [12, 2240], [12, 2240], [12, 2304], [12, 2304], [11, 1856], [11, 1856], [11, 1856], [11, 1856], [11, 1920], [11, 1920], [11, 1920], [11, 1920], [12, 2368], [12, 2368], [12, 2432], [12, 2432], [12, 2496], [12, 2496], [12, 2560], [12, 2560], [10, 18], [10, 18], [10, 18], [10, 18], [10, 18], [10, 18], [10, 18], [10, 18], [12, 52], [12, 52], [13, 640], [13, 704], [13, 768], [13, 832], [12, 55], [12, 55], [12, 56], [12, 56], [13, 1280], [13, 1344], [13, 1408], [13, 1472], [12, 59], [12, 59], [12, 60], [12, 60], [13, 1536], [13, 1600], [11, 24], [11, 24], [11, 24], [11, 24], [11, 25], [11, 25], [11, 25], [11, 25], [13, 1664], [13, 1728], [12, 320], [12, 320], [12, 384], [12, 384], [12, 448], [12, 448], [13, 512], [13, 576], [12, 53], [12, 53], [12, 54], [12, 54], [13, 896], [13, 960], [13, 1024], [13, 1088], [13, 1152], [13, 1216], [10, 64], [10, 64], [10, 64], [10, 64], [10, 64], [10, 64], [10, 64], [10, 64]];
|
|
const blackTable2 = [[8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [11, 23], [11, 23], [12, 50], [12, 51], [12, 44], [12, 45], [12, 46], [12, 47], [12, 57], [12, 58], [12, 61], [12, 256], [10, 16], [10, 16], [10, 16], [10, 16], [10, 17], [10, 17], [10, 17], [10, 17], [12, 48], [12, 49], [12, 62], [12, 63], [12, 30], [12, 31], [12, 32], [12, 33], [12, 40], [12, 41], [11, 22], [11, 22], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [9, 15], [9, 15], [9, 15], [9, 15], [9, 15], [9, 15], [9, 15], [9, 15], [12, 128], [12, 192], [12, 26], [12, 27], [12, 28], [12, 29], [11, 19], [11, 19], [11, 20], [11, 20], [12, 34], [12, 35], [12, 36], [12, 37], [12, 38], [12, 39], [11, 21], [11, 21], [12, 42], [12, 43], [10, 0], [10, 0], [10, 0], [10, 0], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12]];
|
|
const blackTable3 = [[-1, -1], [-1, -1], [-1, -1], [-1, -1], [6, 9], [6, 8], [5, 7], [5, 7], [4, 6], [4, 6], [4, 6], [4, 6], [4, 5], [4, 5], [4, 5], [4, 5], [3, 1], [3, 1], [3, 1], [3, 1], [3, 1], [3, 1], [3, 1], [3, 1], [3, 4], [3, 4], [3, 4], [3, 4], [3, 4], [3, 4], [3, 4], [3, 4], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2]];
|
|
|
|
function CCITTFaxDecoder(source, options = {}) {
|
|
if (!source || typeof source.next !== "function") {
|
|
throw new Error('CCITTFaxDecoder - invalid "source" parameter.');
|
|
}
|
|
|
|
this.source = source;
|
|
this.eof = false;
|
|
this.encoding = options.K || 0;
|
|
this.eoline = options.EndOfLine || false;
|
|
this.byteAlign = options.EncodedByteAlign || false;
|
|
this.columns = options.Columns || 1728;
|
|
this.rows = options.Rows || 0;
|
|
let eoblock = options.EndOfBlock;
|
|
|
|
if (eoblock === null || eoblock === undefined) {
|
|
eoblock = true;
|
|
}
|
|
|
|
this.eoblock = eoblock;
|
|
this.black = options.BlackIs1 || false;
|
|
this.codingLine = new Uint32Array(this.columns + 1);
|
|
this.refLine = new Uint32Array(this.columns + 2);
|
|
this.codingLine[0] = this.columns;
|
|
this.codingPos = 0;
|
|
this.row = 0;
|
|
this.nextLine2D = this.encoding < 0;
|
|
this.inputBits = 0;
|
|
this.inputBuf = 0;
|
|
this.outputBits = 0;
|
|
this.rowsDone = false;
|
|
let code1;
|
|
|
|
while ((code1 = this._lookBits(12)) === 0) {
|
|
this._eatBits(1);
|
|
}
|
|
|
|
if (code1 === 1) {
|
|
this._eatBits(12);
|
|
}
|
|
|
|
if (this.encoding > 0) {
|
|
this.nextLine2D = !this._lookBits(1);
|
|
|
|
this._eatBits(1);
|
|
}
|
|
}
|
|
|
|
CCITTFaxDecoder.prototype = {
|
|
readNextChar() {
|
|
if (this.eof) {
|
|
return -1;
|
|
}
|
|
|
|
const refLine = this.refLine;
|
|
const codingLine = this.codingLine;
|
|
const columns = this.columns;
|
|
let refPos, blackPixels, bits, i;
|
|
|
|
if (this.outputBits === 0) {
|
|
if (this.rowsDone) {
|
|
this.eof = true;
|
|
}
|
|
|
|
if (this.eof) {
|
|
return -1;
|
|
}
|
|
|
|
this.err = false;
|
|
let code1, code2, code3;
|
|
|
|
if (this.nextLine2D) {
|
|
for (i = 0; codingLine[i] < columns; ++i) {
|
|
refLine[i] = codingLine[i];
|
|
}
|
|
|
|
refLine[i++] = columns;
|
|
refLine[i] = columns;
|
|
codingLine[0] = 0;
|
|
this.codingPos = 0;
|
|
refPos = 0;
|
|
blackPixels = 0;
|
|
|
|
while (codingLine[this.codingPos] < columns) {
|
|
code1 = this._getTwoDimCode();
|
|
|
|
switch (code1) {
|
|
case twoDimPass:
|
|
this._addPixels(refLine[refPos + 1], blackPixels);
|
|
|
|
if (refLine[refPos + 1] < columns) {
|
|
refPos += 2;
|
|
}
|
|
|
|
break;
|
|
|
|
case twoDimHoriz:
|
|
code1 = code2 = 0;
|
|
|
|
if (blackPixels) {
|
|
do {
|
|
code1 += code3 = this._getBlackCode();
|
|
} while (code3 >= 64);
|
|
|
|
do {
|
|
code2 += code3 = this._getWhiteCode();
|
|
} while (code3 >= 64);
|
|
} else {
|
|
do {
|
|
code1 += code3 = this._getWhiteCode();
|
|
} while (code3 >= 64);
|
|
|
|
do {
|
|
code2 += code3 = this._getBlackCode();
|
|
} while (code3 >= 64);
|
|
}
|
|
|
|
this._addPixels(codingLine[this.codingPos] + code1, blackPixels);
|
|
|
|
if (codingLine[this.codingPos] < columns) {
|
|
this._addPixels(codingLine[this.codingPos] + code2, blackPixels ^ 1);
|
|
}
|
|
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|
refPos += 2;
|
|
}
|
|
|
|
break;
|
|
|
|
case twoDimVertR3:
|
|
this._addPixels(refLine[refPos] + 3, blackPixels);
|
|
|
|
blackPixels ^= 1;
|
|
|
|
if (codingLine[this.codingPos] < columns) {
|
|
++refPos;
|
|
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|
refPos += 2;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case twoDimVertR2:
|
|
this._addPixels(refLine[refPos] + 2, blackPixels);
|
|
|
|
blackPixels ^= 1;
|
|
|
|
if (codingLine[this.codingPos] < columns) {
|
|
++refPos;
|
|
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|
refPos += 2;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case twoDimVertR1:
|
|
this._addPixels(refLine[refPos] + 1, blackPixels);
|
|
|
|
blackPixels ^= 1;
|
|
|
|
if (codingLine[this.codingPos] < columns) {
|
|
++refPos;
|
|
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|
refPos += 2;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case twoDimVert0:
|
|
this._addPixels(refLine[refPos], blackPixels);
|
|
|
|
blackPixels ^= 1;
|
|
|
|
if (codingLine[this.codingPos] < columns) {
|
|
++refPos;
|
|
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|
refPos += 2;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case twoDimVertL3:
|
|
this._addPixelsNeg(refLine[refPos] - 3, blackPixels);
|
|
|
|
blackPixels ^= 1;
|
|
|
|
if (codingLine[this.codingPos] < columns) {
|
|
if (refPos > 0) {
|
|
--refPos;
|
|
} else {
|
|
++refPos;
|
|
}
|
|
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|
refPos += 2;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case twoDimVertL2:
|
|
this._addPixelsNeg(refLine[refPos] - 2, blackPixels);
|
|
|
|
blackPixels ^= 1;
|
|
|
|
if (codingLine[this.codingPos] < columns) {
|
|
if (refPos > 0) {
|
|
--refPos;
|
|
} else {
|
|
++refPos;
|
|
}
|
|
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|
refPos += 2;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case twoDimVertL1:
|
|
this._addPixelsNeg(refLine[refPos] - 1, blackPixels);
|
|
|
|
blackPixels ^= 1;
|
|
|
|
if (codingLine[this.codingPos] < columns) {
|
|
if (refPos > 0) {
|
|
--refPos;
|
|
} else {
|
|
++refPos;
|
|
}
|
|
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|
refPos += 2;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case ccittEOF:
|
|
this._addPixels(columns, 0);
|
|
|
|
this.eof = true;
|
|
break;
|
|
|
|
default:
|
|
(0, _util.info)("bad 2d code");
|
|
|
|
this._addPixels(columns, 0);
|
|
|
|
this.err = true;
|
|
}
|
|
}
|
|
} else {
|
|
codingLine[0] = 0;
|
|
this.codingPos = 0;
|
|
blackPixels = 0;
|
|
|
|
while (codingLine[this.codingPos] < columns) {
|
|
code1 = 0;
|
|
|
|
if (blackPixels) {
|
|
do {
|
|
code1 += code3 = this._getBlackCode();
|
|
} while (code3 >= 64);
|
|
} else {
|
|
do {
|
|
code1 += code3 = this._getWhiteCode();
|
|
} while (code3 >= 64);
|
|
}
|
|
|
|
this._addPixels(codingLine[this.codingPos] + code1, blackPixels);
|
|
|
|
blackPixels ^= 1;
|
|
}
|
|
}
|
|
|
|
let gotEOL = false;
|
|
|
|
if (this.byteAlign) {
|
|
this.inputBits &= ~7;
|
|
}
|
|
|
|
if (!this.eoblock && this.row === this.rows - 1) {
|
|
this.rowsDone = true;
|
|
} else {
|
|
code1 = this._lookBits(12);
|
|
|
|
if (this.eoline) {
|
|
while (code1 !== ccittEOF && code1 !== 1) {
|
|
this._eatBits(1);
|
|
|
|
code1 = this._lookBits(12);
|
|
}
|
|
} else {
|
|
while (code1 === 0) {
|
|
this._eatBits(1);
|
|
|
|
code1 = this._lookBits(12);
|
|
}
|
|
}
|
|
|
|
if (code1 === 1) {
|
|
this._eatBits(12);
|
|
|
|
gotEOL = true;
|
|
} else if (code1 === ccittEOF) {
|
|
this.eof = true;
|
|
}
|
|
}
|
|
|
|
if (!this.eof && this.encoding > 0 && !this.rowsDone) {
|
|
this.nextLine2D = !this._lookBits(1);
|
|
|
|
this._eatBits(1);
|
|
}
|
|
|
|
if (this.eoblock && gotEOL && this.byteAlign) {
|
|
code1 = this._lookBits(12);
|
|
|
|
if (code1 === 1) {
|
|
this._eatBits(12);
|
|
|
|
if (this.encoding > 0) {
|
|
this._lookBits(1);
|
|
|
|
this._eatBits(1);
|
|
}
|
|
|
|
if (this.encoding >= 0) {
|
|
for (i = 0; i < 4; ++i) {
|
|
code1 = this._lookBits(12);
|
|
|
|
if (code1 !== 1) {
|
|
(0, _util.info)("bad rtc code: " + code1);
|
|
}
|
|
|
|
this._eatBits(12);
|
|
|
|
if (this.encoding > 0) {
|
|
this._lookBits(1);
|
|
|
|
this._eatBits(1);
|
|
}
|
|
}
|
|
}
|
|
|
|
this.eof = true;
|
|
}
|
|
} else if (this.err && this.eoline) {
|
|
while (true) {
|
|
code1 = this._lookBits(13);
|
|
|
|
if (code1 === ccittEOF) {
|
|
this.eof = true;
|
|
return -1;
|
|
}
|
|
|
|
if (code1 >> 1 === 1) {
|
|
break;
|
|
}
|
|
|
|
this._eatBits(1);
|
|
}
|
|
|
|
this._eatBits(12);
|
|
|
|
if (this.encoding > 0) {
|
|
this._eatBits(1);
|
|
|
|
this.nextLine2D = !(code1 & 1);
|
|
}
|
|
}
|
|
|
|
if (codingLine[0] > 0) {
|
|
this.outputBits = codingLine[this.codingPos = 0];
|
|
} else {
|
|
this.outputBits = codingLine[this.codingPos = 1];
|
|
}
|
|
|
|
this.row++;
|
|
}
|
|
|
|
let c;
|
|
|
|
if (this.outputBits >= 8) {
|
|
c = this.codingPos & 1 ? 0 : 0xff;
|
|
this.outputBits -= 8;
|
|
|
|
if (this.outputBits === 0 && codingLine[this.codingPos] < columns) {
|
|
this.codingPos++;
|
|
this.outputBits = codingLine[this.codingPos] - codingLine[this.codingPos - 1];
|
|
}
|
|
} else {
|
|
bits = 8;
|
|
c = 0;
|
|
|
|
do {
|
|
if (this.outputBits > bits) {
|
|
c <<= bits;
|
|
|
|
if (!(this.codingPos & 1)) {
|
|
c |= 0xff >> 8 - bits;
|
|
}
|
|
|
|
this.outputBits -= bits;
|
|
bits = 0;
|
|
} else {
|
|
c <<= this.outputBits;
|
|
|
|
if (!(this.codingPos & 1)) {
|
|
c |= 0xff >> 8 - this.outputBits;
|
|
}
|
|
|
|
bits -= this.outputBits;
|
|
this.outputBits = 0;
|
|
|
|
if (codingLine[this.codingPos] < columns) {
|
|
this.codingPos++;
|
|
this.outputBits = codingLine[this.codingPos] - codingLine[this.codingPos - 1];
|
|
} else if (bits > 0) {
|
|
c <<= bits;
|
|
bits = 0;
|
|
}
|
|
}
|
|
} while (bits);
|
|
}
|
|
|
|
if (this.black) {
|
|
c ^= 0xff;
|
|
}
|
|
|
|
return c;
|
|
},
|
|
|
|
_addPixels(a1, blackPixels) {
|
|
const codingLine = this.codingLine;
|
|
let codingPos = this.codingPos;
|
|
|
|
if (a1 > codingLine[codingPos]) {
|
|
if (a1 > this.columns) {
|
|
(0, _util.info)("row is wrong length");
|
|
this.err = true;
|
|
a1 = this.columns;
|
|
}
|
|
|
|
if (codingPos & 1 ^ blackPixels) {
|
|
++codingPos;
|
|
}
|
|
|
|
codingLine[codingPos] = a1;
|
|
}
|
|
|
|
this.codingPos = codingPos;
|
|
},
|
|
|
|
_addPixelsNeg(a1, blackPixels) {
|
|
const codingLine = this.codingLine;
|
|
let codingPos = this.codingPos;
|
|
|
|
if (a1 > codingLine[codingPos]) {
|
|
if (a1 > this.columns) {
|
|
(0, _util.info)("row is wrong length");
|
|
this.err = true;
|
|
a1 = this.columns;
|
|
}
|
|
|
|
if (codingPos & 1 ^ blackPixels) {
|
|
++codingPos;
|
|
}
|
|
|
|
codingLine[codingPos] = a1;
|
|
} else if (a1 < codingLine[codingPos]) {
|
|
if (a1 < 0) {
|
|
(0, _util.info)("invalid code");
|
|
this.err = true;
|
|
a1 = 0;
|
|
}
|
|
|
|
while (codingPos > 0 && a1 < codingLine[codingPos - 1]) {
|
|
--codingPos;
|
|
}
|
|
|
|
codingLine[codingPos] = a1;
|
|
}
|
|
|
|
this.codingPos = codingPos;
|
|
},
|
|
|
|
_findTableCode(start, end, table, limit) {
|
|
const limitValue = limit || 0;
|
|
|
|
for (let i = start; i <= end; ++i) {
|
|
let code = this._lookBits(i);
|
|
|
|
if (code === ccittEOF) {
|
|
return [true, 1, false];
|
|
}
|
|
|
|
if (i < end) {
|
|
code <<= end - i;
|
|
}
|
|
|
|
if (!limitValue || code >= limitValue) {
|
|
const p = table[code - limitValue];
|
|
|
|
if (p[0] === i) {
|
|
this._eatBits(i);
|
|
|
|
return [true, p[1], true];
|
|
}
|
|
}
|
|
}
|
|
|
|
return [false, 0, false];
|
|
},
|
|
|
|
_getTwoDimCode() {
|
|
let code = 0;
|
|
let p;
|
|
|
|
if (this.eoblock) {
|
|
code = this._lookBits(7);
|
|
p = twoDimTable[code];
|
|
|
|
if (p && p[0] > 0) {
|
|
this._eatBits(p[0]);
|
|
|
|
return p[1];
|
|
}
|
|
} else {
|
|
const result = this._findTableCode(1, 7, twoDimTable);
|
|
|
|
if (result[0] && result[2]) {
|
|
return result[1];
|
|
}
|
|
}
|
|
|
|
(0, _util.info)("Bad two dim code");
|
|
return ccittEOF;
|
|
},
|
|
|
|
_getWhiteCode() {
|
|
let code = 0;
|
|
let p;
|
|
|
|
if (this.eoblock) {
|
|
code = this._lookBits(12);
|
|
|
|
if (code === ccittEOF) {
|
|
return 1;
|
|
}
|
|
|
|
if (code >> 5 === 0) {
|
|
p = whiteTable1[code];
|
|
} else {
|
|
p = whiteTable2[code >> 3];
|
|
}
|
|
|
|
if (p[0] > 0) {
|
|
this._eatBits(p[0]);
|
|
|
|
return p[1];
|
|
}
|
|
} else {
|
|
let result = this._findTableCode(1, 9, whiteTable2);
|
|
|
|
if (result[0]) {
|
|
return result[1];
|
|
}
|
|
|
|
result = this._findTableCode(11, 12, whiteTable1);
|
|
|
|
if (result[0]) {
|
|
return result[1];
|
|
}
|
|
}
|
|
|
|
(0, _util.info)("bad white code");
|
|
|
|
this._eatBits(1);
|
|
|
|
return 1;
|
|
},
|
|
|
|
_getBlackCode() {
|
|
let code, p;
|
|
|
|
if (this.eoblock) {
|
|
code = this._lookBits(13);
|
|
|
|
if (code === ccittEOF) {
|
|
return 1;
|
|
}
|
|
|
|
if (code >> 7 === 0) {
|
|
p = blackTable1[code];
|
|
} else if (code >> 9 === 0 && code >> 7 !== 0) {
|
|
p = blackTable2[(code >> 1) - 64];
|
|
} else {
|
|
p = blackTable3[code >> 7];
|
|
}
|
|
|
|
if (p[0] > 0) {
|
|
this._eatBits(p[0]);
|
|
|
|
return p[1];
|
|
}
|
|
} else {
|
|
let result = this._findTableCode(2, 6, blackTable3);
|
|
|
|
if (result[0]) {
|
|
return result[1];
|
|
}
|
|
|
|
result = this._findTableCode(7, 12, blackTable2, 64);
|
|
|
|
if (result[0]) {
|
|
return result[1];
|
|
}
|
|
|
|
result = this._findTableCode(10, 13, blackTable1);
|
|
|
|
if (result[0]) {
|
|
return result[1];
|
|
}
|
|
}
|
|
|
|
(0, _util.info)("bad black code");
|
|
|
|
this._eatBits(1);
|
|
|
|
return 1;
|
|
},
|
|
|
|
_lookBits(n) {
|
|
let c;
|
|
|
|
while (this.inputBits < n) {
|
|
if ((c = this.source.next()) === -1) {
|
|
if (this.inputBits === 0) {
|
|
return ccittEOF;
|
|
}
|
|
|
|
return this.inputBuf << n - this.inputBits & 0xffff >> 16 - n;
|
|
}
|
|
|
|
this.inputBuf = this.inputBuf << 8 | c;
|
|
this.inputBits += 8;
|
|
}
|
|
|
|
return this.inputBuf >> this.inputBits - n & 0xffff >> 16 - n;
|
|
},
|
|
|
|
_eatBits(n) {
|
|
if ((this.inputBits -= n) < 0) {
|
|
this.inputBits = 0;
|
|
}
|
|
}
|
|
|
|
};
|
|
return CCITTFaxDecoder;
|
|
}();
|
|
|
|
exports.CCITTFaxDecoder = CCITTFaxDecoder;
|
|
|
|
/***/ }),
|
|
/* 8 */
|
|
/***/ (function(module, exports, __w_pdfjs_require__) {
|
|
|
|
"use strict";
|
|
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.JpegImage = void 0;
|
|
|
|
var _util = __w_pdfjs_require__(1);
|
|
|
|
var _core_utils = __w_pdfjs_require__(5);
|
|
|
|
class JpegError extends _util.BaseException {
|
|
constructor(msg) {
|
|
super(`JPEG error: ${msg}`);
|
|
}
|
|
|
|
}
|
|
|
|
class DNLMarkerError extends _util.BaseException {
|
|
constructor(message, scanLines) {
|
|
super(message);
|
|
this.scanLines = scanLines;
|
|
}
|
|
|
|
}
|
|
|
|
class EOIMarkerError extends _util.BaseException {}
|
|
|
|
var JpegImage = function JpegImageClosure() {
|
|
var dctZigZag = new Uint8Array([0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, 18, 11, 4, 5, 12, 19, 26, 33, 40, 48, 41, 34, 27, 20, 13, 6, 7, 14, 21, 28, 35, 42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23, 30, 37, 44, 51, 58, 59, 52, 45, 38, 31, 39, 46, 53, 60, 61, 54, 47, 55, 62, 63]);
|
|
var dctCos1 = 4017;
|
|
var dctSin1 = 799;
|
|
var dctCos3 = 3406;
|
|
var dctSin3 = 2276;
|
|
var dctCos6 = 1567;
|
|
var dctSin6 = 3784;
|
|
var dctSqrt2 = 5793;
|
|
var dctSqrt1d2 = 2896;
|
|
|
|
function JpegImage({
|
|
decodeTransform = null,
|
|
colorTransform = -1
|
|
} = {}) {
|
|
this._decodeTransform = decodeTransform;
|
|
this._colorTransform = colorTransform;
|
|
}
|
|
|
|
function buildHuffmanTable(codeLengths, values) {
|
|
var k = 0,
|
|
code = [],
|
|
i,
|
|
j,
|
|
length = 16;
|
|
|
|
while (length > 0 && !codeLengths[length - 1]) {
|
|
length--;
|
|
}
|
|
|
|
code.push({
|
|
children: [],
|
|
index: 0
|
|
});
|
|
var p = code[0],
|
|
q;
|
|
|
|
for (i = 0; i < length; i++) {
|
|
for (j = 0; j < codeLengths[i]; j++) {
|
|
p = code.pop();
|
|
p.children[p.index] = values[k];
|
|
|
|
while (p.index > 0) {
|
|
p = code.pop();
|
|
}
|
|
|
|
p.index++;
|
|
code.push(p);
|
|
|
|
while (code.length <= i) {
|
|
code.push(q = {
|
|
children: [],
|
|
index: 0
|
|
});
|
|
p.children[p.index] = q.children;
|
|
p = q;
|
|
}
|
|
|
|
k++;
|
|
}
|
|
|
|
if (i + 1 < length) {
|
|
code.push(q = {
|
|
children: [],
|
|
index: 0
|
|
});
|
|
p.children[p.index] = q.children;
|
|
p = q;
|
|
}
|
|
}
|
|
|
|
return code[0].children;
|
|
}
|
|
|
|
function getBlockBufferOffset(component, row, col) {
|
|
return 64 * ((component.blocksPerLine + 1) * row + col);
|
|
}
|
|
|
|
function decodeScan(data, offset, frame, components, resetInterval, spectralStart, spectralEnd, successivePrev, successive, parseDNLMarker = false) {
|
|
var mcusPerLine = frame.mcusPerLine;
|
|
var progressive = frame.progressive;
|
|
const startOffset = offset;
|
|
let bitsData = 0,
|
|
bitsCount = 0;
|
|
|
|
function readBit() {
|
|
if (bitsCount > 0) {
|
|
bitsCount--;
|
|
return bitsData >> bitsCount & 1;
|
|
}
|
|
|
|
bitsData = data[offset++];
|
|
|
|
if (bitsData === 0xff) {
|
|
var nextByte = data[offset++];
|
|
|
|
if (nextByte) {
|
|
if (nextByte === 0xdc && parseDNLMarker) {
|
|
offset += 2;
|
|
const scanLines = (0, _core_utils.readUint16)(data, offset);
|
|
offset += 2;
|
|
|
|
if (scanLines > 0 && scanLines !== frame.scanLines) {
|
|
throw new DNLMarkerError("Found DNL marker (0xFFDC) while parsing scan data", scanLines);
|
|
}
|
|
} else if (nextByte === 0xd9) {
|
|
if (parseDNLMarker) {
|
|
const maybeScanLines = blockRow * (frame.precision === 8 ? 8 : 0);
|
|
|
|
if (maybeScanLines > 0 && Math.round(frame.scanLines / maybeScanLines) >= 10) {
|
|
throw new DNLMarkerError("Found EOI marker (0xFFD9) while parsing scan data, " + "possibly caused by incorrect `scanLines` parameter", maybeScanLines);
|
|
}
|
|
}
|
|
|
|
throw new EOIMarkerError("Found EOI marker (0xFFD9) while parsing scan data");
|
|
}
|
|
|
|
throw new JpegError(`unexpected marker ${(bitsData << 8 | nextByte).toString(16)}`);
|
|
}
|
|
}
|
|
|
|
bitsCount = 7;
|
|
return bitsData >>> 7;
|
|
}
|
|
|
|
function decodeHuffman(tree) {
|
|
var node = tree;
|
|
|
|
while (true) {
|
|
node = node[readBit()];
|
|
|
|
switch (typeof node) {
|
|
case "number":
|
|
return node;
|
|
|
|
case "object":
|
|
continue;
|
|
}
|
|
|
|
throw new JpegError("invalid huffman sequence");
|
|
}
|
|
}
|
|
|
|
function receive(length) {
|
|
var n = 0;
|
|
|
|
while (length > 0) {
|
|
n = n << 1 | readBit();
|
|
length--;
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
function receiveAndExtend(length) {
|
|
if (length === 1) {
|
|
return readBit() === 1 ? 1 : -1;
|
|
}
|
|
|
|
var n = receive(length);
|
|
|
|
if (n >= 1 << length - 1) {
|
|
return n;
|
|
}
|
|
|
|
return n + (-1 << length) + 1;
|
|
}
|
|
|
|
function decodeBaseline(component, blockOffset) {
|
|
var t = decodeHuffman(component.huffmanTableDC);
|
|
var diff = t === 0 ? 0 : receiveAndExtend(t);
|
|
component.blockData[blockOffset] = component.pred += diff;
|
|
var k = 1;
|
|
|
|
while (k < 64) {
|
|
var rs = decodeHuffman(component.huffmanTableAC);
|
|
var s = rs & 15,
|
|
r = rs >> 4;
|
|
|
|
if (s === 0) {
|
|
if (r < 15) {
|
|
break;
|
|
}
|
|
|
|
k += 16;
|
|
continue;
|
|
}
|
|
|
|
k += r;
|
|
var z = dctZigZag[k];
|
|
component.blockData[blockOffset + z] = receiveAndExtend(s);
|
|
k++;
|
|
}
|
|
}
|
|
|
|
function decodeDCFirst(component, blockOffset) {
|
|
var t = decodeHuffman(component.huffmanTableDC);
|
|
var diff = t === 0 ? 0 : receiveAndExtend(t) << successive;
|
|
component.blockData[blockOffset] = component.pred += diff;
|
|
}
|
|
|
|
function decodeDCSuccessive(component, blockOffset) {
|
|
component.blockData[blockOffset] |= readBit() << successive;
|
|
}
|
|
|
|
var eobrun = 0;
|
|
|
|
function decodeACFirst(component, blockOffset) {
|
|
if (eobrun > 0) {
|
|
eobrun--;
|
|
return;
|
|
}
|
|
|
|
var k = spectralStart,
|
|
e = spectralEnd;
|
|
|
|
while (k <= e) {
|
|
var rs = decodeHuffman(component.huffmanTableAC);
|
|
var s = rs & 15,
|
|
r = rs >> 4;
|
|
|
|
if (s === 0) {
|
|
if (r < 15) {
|
|
eobrun = receive(r) + (1 << r) - 1;
|
|
break;
|
|
}
|
|
|
|
k += 16;
|
|
continue;
|
|
}
|
|
|
|
k += r;
|
|
var z = dctZigZag[k];
|
|
component.blockData[blockOffset + z] = receiveAndExtend(s) * (1 << successive);
|
|
k++;
|
|
}
|
|
}
|
|
|
|
var successiveACState = 0,
|
|
successiveACNextValue;
|
|
|
|
function decodeACSuccessive(component, blockOffset) {
|
|
var k = spectralStart;
|
|
var e = spectralEnd;
|
|
var r = 0;
|
|
var s;
|
|
var rs;
|
|
|
|
while (k <= e) {
|
|
const offsetZ = blockOffset + dctZigZag[k];
|
|
const sign = component.blockData[offsetZ] < 0 ? -1 : 1;
|
|
|
|
switch (successiveACState) {
|
|
case 0:
|
|
rs = decodeHuffman(component.huffmanTableAC);
|
|
s = rs & 15;
|
|
r = rs >> 4;
|
|
|
|
if (s === 0) {
|
|
if (r < 15) {
|
|
eobrun = receive(r) + (1 << r);
|
|
successiveACState = 4;
|
|
} else {
|
|
r = 16;
|
|
successiveACState = 1;
|
|
}
|
|
} else {
|
|
if (s !== 1) {
|
|
throw new JpegError("invalid ACn encoding");
|
|
}
|
|
|
|
successiveACNextValue = receiveAndExtend(s);
|
|
successiveACState = r ? 2 : 3;
|
|
}
|
|
|
|
continue;
|
|
|
|
case 1:
|
|
case 2:
|
|
if (component.blockData[offsetZ]) {
|
|
component.blockData[offsetZ] += sign * (readBit() << successive);
|
|
} else {
|
|
r--;
|
|
|
|
if (r === 0) {
|
|
successiveACState = successiveACState === 2 ? 3 : 0;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case 3:
|
|
if (component.blockData[offsetZ]) {
|
|
component.blockData[offsetZ] += sign * (readBit() << successive);
|
|
} else {
|
|
component.blockData[offsetZ] = successiveACNextValue << successive;
|
|
successiveACState = 0;
|
|
}
|
|
|
|
break;
|
|
|
|
case 4:
|
|
if (component.blockData[offsetZ]) {
|
|
component.blockData[offsetZ] += sign * (readBit() << successive);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
k++;
|
|
}
|
|
|
|
if (successiveACState === 4) {
|
|
eobrun--;
|
|
|
|
if (eobrun === 0) {
|
|
successiveACState = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
let blockRow = 0;
|
|
|
|
function decodeMcu(component, decode, mcu, row, col) {
|
|
var mcuRow = mcu / mcusPerLine | 0;
|
|
var mcuCol = mcu % mcusPerLine;
|
|
blockRow = mcuRow * component.v + row;
|
|
var blockCol = mcuCol * component.h + col;
|
|
const blockOffset = getBlockBufferOffset(component, blockRow, blockCol);
|
|
decode(component, blockOffset);
|
|
}
|
|
|
|
function decodeBlock(component, decode, mcu) {
|
|
blockRow = mcu / component.blocksPerLine | 0;
|
|
var blockCol = mcu % component.blocksPerLine;
|
|
const blockOffset = getBlockBufferOffset(component, blockRow, blockCol);
|
|
decode(component, blockOffset);
|
|
}
|
|
|
|
var componentsLength = components.length;
|
|
var component, i, j, k, n;
|
|
var decodeFn;
|
|
|
|
if (progressive) {
|
|
if (spectralStart === 0) {
|
|
decodeFn = successivePrev === 0 ? decodeDCFirst : decodeDCSuccessive;
|
|
} else {
|
|
decodeFn = successivePrev === 0 ? decodeACFirst : decodeACSuccessive;
|
|
}
|
|
} else {
|
|
decodeFn = decodeBaseline;
|
|
}
|
|
|
|
var mcu = 0,
|
|
fileMarker;
|
|
var mcuExpected;
|
|
|
|
if (componentsLength === 1) {
|
|
mcuExpected = components[0].blocksPerLine * components[0].blocksPerColumn;
|
|
} else {
|
|
mcuExpected = mcusPerLine * frame.mcusPerColumn;
|
|
}
|
|
|
|
var h, v;
|
|
|
|
while (mcu <= mcuExpected) {
|
|
var mcuToRead = resetInterval ? Math.min(mcuExpected - mcu, resetInterval) : mcuExpected;
|
|
|
|
if (mcuToRead > 0) {
|
|
for (i = 0; i < componentsLength; i++) {
|
|
components[i].pred = 0;
|
|
}
|
|
|
|
eobrun = 0;
|
|
|
|
if (componentsLength === 1) {
|
|
component = components[0];
|
|
|
|
for (n = 0; n < mcuToRead; n++) {
|
|
decodeBlock(component, decodeFn, mcu);
|
|
mcu++;
|
|
}
|
|
} else {
|
|
for (n = 0; n < mcuToRead; n++) {
|
|
for (i = 0; i < componentsLength; i++) {
|
|
component = components[i];
|
|
h = component.h;
|
|
v = component.v;
|
|
|
|
for (j = 0; j < v; j++) {
|
|
for (k = 0; k < h; k++) {
|
|
decodeMcu(component, decodeFn, mcu, j, k);
|
|
}
|
|
}
|
|
}
|
|
|
|
mcu++;
|
|
}
|
|
}
|
|
}
|
|
|
|
bitsCount = 0;
|
|
fileMarker = findNextFileMarker(data, offset);
|
|
|
|
if (!fileMarker) {
|
|
break;
|
|
}
|
|
|
|
if (fileMarker.invalid) {
|
|
const partialMsg = mcuToRead > 0 ? "unexpected" : "excessive";
|
|
(0, _util.warn)(`decodeScan - ${partialMsg} MCU data, current marker is: ${fileMarker.invalid}`);
|
|
offset = fileMarker.offset;
|
|
}
|
|
|
|
if (fileMarker.marker >= 0xffd0 && fileMarker.marker <= 0xffd7) {
|
|
offset += 2;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return offset - startOffset;
|
|
}
|
|
|
|
function quantizeAndInverse(component, blockBufferOffset, p) {
|
|
var qt = component.quantizationTable,
|
|
blockData = component.blockData;
|
|
var v0, v1, v2, v3, v4, v5, v6, v7;
|
|
var p0, p1, p2, p3, p4, p5, p6, p7;
|
|
var t;
|
|
|
|
if (!qt) {
|
|
throw new JpegError("missing required Quantization Table.");
|
|
}
|
|
|
|
for (var row = 0; row < 64; row += 8) {
|
|
p0 = blockData[blockBufferOffset + row];
|
|
p1 = blockData[blockBufferOffset + row + 1];
|
|
p2 = blockData[blockBufferOffset + row + 2];
|
|
p3 = blockData[blockBufferOffset + row + 3];
|
|
p4 = blockData[blockBufferOffset + row + 4];
|
|
p5 = blockData[blockBufferOffset + row + 5];
|
|
p6 = blockData[blockBufferOffset + row + 6];
|
|
p7 = blockData[blockBufferOffset + row + 7];
|
|
p0 *= qt[row];
|
|
|
|
if ((p1 | p2 | p3 | p4 | p5 | p6 | p7) === 0) {
|
|
t = dctSqrt2 * p0 + 512 >> 10;
|
|
p[row] = t;
|
|
p[row + 1] = t;
|
|
p[row + 2] = t;
|
|
p[row + 3] = t;
|
|
p[row + 4] = t;
|
|
p[row + 5] = t;
|
|
p[row + 6] = t;
|
|
p[row + 7] = t;
|
|
continue;
|
|
}
|
|
|
|
p1 *= qt[row + 1];
|
|
p2 *= qt[row + 2];
|
|
p3 *= qt[row + 3];
|
|
p4 *= qt[row + 4];
|
|
p5 *= qt[row + 5];
|
|
p6 *= qt[row + 6];
|
|
p7 *= qt[row + 7];
|
|
v0 = dctSqrt2 * p0 + 128 >> 8;
|
|
v1 = dctSqrt2 * p4 + 128 >> 8;
|
|
v2 = p2;
|
|
v3 = p6;
|
|
v4 = dctSqrt1d2 * (p1 - p7) + 128 >> 8;
|
|
v7 = dctSqrt1d2 * (p1 + p7) + 128 >> 8;
|
|
v5 = p3 << 4;
|
|
v6 = p5 << 4;
|
|
v0 = v0 + v1 + 1 >> 1;
|
|
v1 = v0 - v1;
|
|
t = v2 * dctSin6 + v3 * dctCos6 + 128 >> 8;
|
|
v2 = v2 * dctCos6 - v3 * dctSin6 + 128 >> 8;
|
|
v3 = t;
|
|
v4 = v4 + v6 + 1 >> 1;
|
|
v6 = v4 - v6;
|
|
v7 = v7 + v5 + 1 >> 1;
|
|
v5 = v7 - v5;
|
|
v0 = v0 + v3 + 1 >> 1;
|
|
v3 = v0 - v3;
|
|
v1 = v1 + v2 + 1 >> 1;
|
|
v2 = v1 - v2;
|
|
t = v4 * dctSin3 + v7 * dctCos3 + 2048 >> 12;
|
|
v4 = v4 * dctCos3 - v7 * dctSin3 + 2048 >> 12;
|
|
v7 = t;
|
|
t = v5 * dctSin1 + v6 * dctCos1 + 2048 >> 12;
|
|
v5 = v5 * dctCos1 - v6 * dctSin1 + 2048 >> 12;
|
|
v6 = t;
|
|
p[row] = v0 + v7;
|
|
p[row + 7] = v0 - v7;
|
|
p[row + 1] = v1 + v6;
|
|
p[row + 6] = v1 - v6;
|
|
p[row + 2] = v2 + v5;
|
|
p[row + 5] = v2 - v5;
|
|
p[row + 3] = v3 + v4;
|
|
p[row + 4] = v3 - v4;
|
|
}
|
|
|
|
for (var col = 0; col < 8; ++col) {
|
|
p0 = p[col];
|
|
p1 = p[col + 8];
|
|
p2 = p[col + 16];
|
|
p3 = p[col + 24];
|
|
p4 = p[col + 32];
|
|
p5 = p[col + 40];
|
|
p6 = p[col + 48];
|
|
p7 = p[col + 56];
|
|
|
|
if ((p1 | p2 | p3 | p4 | p5 | p6 | p7) === 0) {
|
|
t = dctSqrt2 * p0 + 8192 >> 14;
|
|
|
|
if (t < -2040) {
|
|
t = 0;
|
|
} else if (t >= 2024) {
|
|
t = 255;
|
|
} else {
|
|
t = t + 2056 >> 4;
|
|
}
|
|
|
|
blockData[blockBufferOffset + col] = t;
|
|
blockData[blockBufferOffset + col + 8] = t;
|
|
blockData[blockBufferOffset + col + 16] = t;
|
|
blockData[blockBufferOffset + col + 24] = t;
|
|
blockData[blockBufferOffset + col + 32] = t;
|
|
blockData[blockBufferOffset + col + 40] = t;
|
|
blockData[blockBufferOffset + col + 48] = t;
|
|
blockData[blockBufferOffset + col + 56] = t;
|
|
continue;
|
|
}
|
|
|
|
v0 = dctSqrt2 * p0 + 2048 >> 12;
|
|
v1 = dctSqrt2 * p4 + 2048 >> 12;
|
|
v2 = p2;
|
|
v3 = p6;
|
|
v4 = dctSqrt1d2 * (p1 - p7) + 2048 >> 12;
|
|
v7 = dctSqrt1d2 * (p1 + p7) + 2048 >> 12;
|
|
v5 = p3;
|
|
v6 = p5;
|
|
v0 = (v0 + v1 + 1 >> 1) + 4112;
|
|
v1 = v0 - v1;
|
|
t = v2 * dctSin6 + v3 * dctCos6 + 2048 >> 12;
|
|
v2 = v2 * dctCos6 - v3 * dctSin6 + 2048 >> 12;
|
|
v3 = t;
|
|
v4 = v4 + v6 + 1 >> 1;
|
|
v6 = v4 - v6;
|
|
v7 = v7 + v5 + 1 >> 1;
|
|
v5 = v7 - v5;
|
|
v0 = v0 + v3 + 1 >> 1;
|
|
v3 = v0 - v3;
|
|
v1 = v1 + v2 + 1 >> 1;
|
|
v2 = v1 - v2;
|
|
t = v4 * dctSin3 + v7 * dctCos3 + 2048 >> 12;
|
|
v4 = v4 * dctCos3 - v7 * dctSin3 + 2048 >> 12;
|
|
v7 = t;
|
|
t = v5 * dctSin1 + v6 * dctCos1 + 2048 >> 12;
|
|
v5 = v5 * dctCos1 - v6 * dctSin1 + 2048 >> 12;
|
|
v6 = t;
|
|
p0 = v0 + v7;
|
|
p7 = v0 - v7;
|
|
p1 = v1 + v6;
|
|
p6 = v1 - v6;
|
|
p2 = v2 + v5;
|
|
p5 = v2 - v5;
|
|
p3 = v3 + v4;
|
|
p4 = v3 - v4;
|
|
|
|
if (p0 < 16) {
|
|
p0 = 0;
|
|
} else if (p0 >= 4080) {
|
|
p0 = 255;
|
|
} else {
|
|
p0 >>= 4;
|
|
}
|
|
|
|
if (p1 < 16) {
|
|
p1 = 0;
|
|
} else if (p1 >= 4080) {
|
|
p1 = 255;
|
|
} else {
|
|
p1 >>= 4;
|
|
}
|
|
|
|
if (p2 < 16) {
|
|
p2 = 0;
|
|
} else if (p2 >= 4080) {
|
|
p2 = 255;
|
|
} else {
|
|
p2 >>= 4;
|
|
}
|
|
|
|
if (p3 < 16) {
|
|
p3 = 0;
|
|
} else if (p3 >= 4080) {
|
|
p3 = 255;
|
|
} else {
|
|
p3 >>= 4;
|
|
}
|
|
|
|
if (p4 < 16) {
|
|
p4 = 0;
|
|
} else if (p4 >= 4080) {
|
|
p4 = 255;
|
|
} else {
|
|
p4 >>= 4;
|
|
}
|
|
|
|
if (p5 < 16) {
|
|
p5 = 0;
|
|
} else if (p5 >= 4080) {
|
|
p5 = 255;
|
|
} else {
|
|
p5 >>= 4;
|
|
}
|
|
|
|
if (p6 < 16) {
|
|
p6 = 0;
|
|
} else if (p6 >= 4080) {
|
|
p6 = 255;
|
|
} else {
|
|
p6 >>= 4;
|
|
}
|
|
|
|
if (p7 < 16) {
|
|
p7 = 0;
|
|
} else if (p7 >= 4080) {
|
|
p7 = 255;
|
|
} else {
|
|
p7 >>= 4;
|
|
}
|
|
|
|
blockData[blockBufferOffset + col] = p0;
|
|
blockData[blockBufferOffset + col + 8] = p1;
|
|
blockData[blockBufferOffset + col + 16] = p2;
|
|
blockData[blockBufferOffset + col + 24] = p3;
|
|
blockData[blockBufferOffset + col + 32] = p4;
|
|
blockData[blockBufferOffset + col + 40] = p5;
|
|
blockData[blockBufferOffset + col + 48] = p6;
|
|
blockData[blockBufferOffset + col + 56] = p7;
|
|
}
|
|
}
|
|
|
|
function buildComponentData(frame, component) {
|
|
var blocksPerLine = component.blocksPerLine;
|
|
var blocksPerColumn = component.blocksPerColumn;
|
|
var computationBuffer = new Int16Array(64);
|
|
|
|
for (var blockRow = 0; blockRow < blocksPerColumn; blockRow++) {
|
|
for (var blockCol = 0; blockCol < blocksPerLine; blockCol++) {
|
|
var offset = getBlockBufferOffset(component, blockRow, blockCol);
|
|
quantizeAndInverse(component, offset, computationBuffer);
|
|
}
|
|
}
|
|
|
|
return component.blockData;
|
|
}
|
|
|
|
function findNextFileMarker(data, currentPos, startPos = currentPos) {
|
|
const maxPos = data.length - 1;
|
|
var newPos = startPos < currentPos ? startPos : currentPos;
|
|
|
|
if (currentPos >= maxPos) {
|
|
return null;
|
|
}
|
|
|
|
var currentMarker = (0, _core_utils.readUint16)(data, currentPos);
|
|
|
|
if (currentMarker >= 0xffc0 && currentMarker <= 0xfffe) {
|
|
return {
|
|
invalid: null,
|
|
marker: currentMarker,
|
|
offset: currentPos
|
|
};
|
|
}
|
|
|
|
var newMarker = (0, _core_utils.readUint16)(data, newPos);
|
|
|
|
while (!(newMarker >= 0xffc0 && newMarker <= 0xfffe)) {
|
|
if (++newPos >= maxPos) {
|
|
return null;
|
|
}
|
|
|
|
newMarker = (0, _core_utils.readUint16)(data, newPos);
|
|
}
|
|
|
|
return {
|
|
invalid: currentMarker.toString(16),
|
|
marker: newMarker,
|
|
offset: newPos
|
|
};
|
|
}
|
|
|
|
JpegImage.prototype = {
|
|
parse(data, {
|
|
dnlScanLines = null
|
|
} = {}) {
|
|
function readDataBlock() {
|
|
const length = (0, _core_utils.readUint16)(data, offset);
|
|
offset += 2;
|
|
let endOffset = offset + length - 2;
|
|
var fileMarker = findNextFileMarker(data, endOffset, offset);
|
|
|
|
if (fileMarker && fileMarker.invalid) {
|
|
(0, _util.warn)("readDataBlock - incorrect length, current marker is: " + fileMarker.invalid);
|
|
endOffset = fileMarker.offset;
|
|
}
|
|
|
|
var array = data.subarray(offset, endOffset);
|
|
offset += array.length;
|
|
return array;
|
|
}
|
|
|
|
function prepareComponents(frame) {
|
|
var mcusPerLine = Math.ceil(frame.samplesPerLine / 8 / frame.maxH);
|
|
var mcusPerColumn = Math.ceil(frame.scanLines / 8 / frame.maxV);
|
|
|
|
for (var i = 0; i < frame.components.length; i++) {
|
|
component = frame.components[i];
|
|
var blocksPerLine = Math.ceil(Math.ceil(frame.samplesPerLine / 8) * component.h / frame.maxH);
|
|
var blocksPerColumn = Math.ceil(Math.ceil(frame.scanLines / 8) * component.v / frame.maxV);
|
|
var blocksPerLineForMcu = mcusPerLine * component.h;
|
|
var blocksPerColumnForMcu = mcusPerColumn * component.v;
|
|
var blocksBufferSize = 64 * blocksPerColumnForMcu * (blocksPerLineForMcu + 1);
|
|
component.blockData = new Int16Array(blocksBufferSize);
|
|
component.blocksPerLine = blocksPerLine;
|
|
component.blocksPerColumn = blocksPerColumn;
|
|
}
|
|
|
|
frame.mcusPerLine = mcusPerLine;
|
|
frame.mcusPerColumn = mcusPerColumn;
|
|
}
|
|
|
|
var offset = 0;
|
|
var jfif = null;
|
|
var adobe = null;
|
|
var frame, resetInterval;
|
|
let numSOSMarkers = 0;
|
|
var quantizationTables = [];
|
|
var huffmanTablesAC = [],
|
|
huffmanTablesDC = [];
|
|
let fileMarker = (0, _core_utils.readUint16)(data, offset);
|
|
offset += 2;
|
|
|
|
if (fileMarker !== 0xffd8) {
|
|
throw new JpegError("SOI not found");
|
|
}
|
|
|
|
fileMarker = (0, _core_utils.readUint16)(data, offset);
|
|
offset += 2;
|
|
|
|
markerLoop: while (fileMarker !== 0xffd9) {
|
|
var i, j, l;
|
|
|
|
switch (fileMarker) {
|
|
case 0xffe0:
|
|
case 0xffe1:
|
|
case 0xffe2:
|
|
case 0xffe3:
|
|
case 0xffe4:
|
|
case 0xffe5:
|
|
case 0xffe6:
|
|
case 0xffe7:
|
|
case 0xffe8:
|
|
case 0xffe9:
|
|
case 0xffea:
|
|
case 0xffeb:
|
|
case 0xffec:
|
|
case 0xffed:
|
|
case 0xffee:
|
|
case 0xffef:
|
|
case 0xfffe:
|
|
var appData = readDataBlock();
|
|
|
|
if (fileMarker === 0xffe0) {
|
|
if (appData[0] === 0x4a && appData[1] === 0x46 && appData[2] === 0x49 && appData[3] === 0x46 && appData[4] === 0) {
|
|
jfif = {
|
|
version: {
|
|
major: appData[5],
|
|
minor: appData[6]
|
|
},
|
|
densityUnits: appData[7],
|
|
xDensity: appData[8] << 8 | appData[9],
|
|
yDensity: appData[10] << 8 | appData[11],
|
|
thumbWidth: appData[12],
|
|
thumbHeight: appData[13],
|
|
thumbData: appData.subarray(14, 14 + 3 * appData[12] * appData[13])
|
|
};
|
|
}
|
|
}
|
|
|
|
if (fileMarker === 0xffee) {
|
|
if (appData[0] === 0x41 && appData[1] === 0x64 && appData[2] === 0x6f && appData[3] === 0x62 && appData[4] === 0x65) {
|
|
adobe = {
|
|
version: appData[5] << 8 | appData[6],
|
|
flags0: appData[7] << 8 | appData[8],
|
|
flags1: appData[9] << 8 | appData[10],
|
|
transformCode: appData[11]
|
|
};
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case 0xffdb:
|
|
const quantizationTablesLength = (0, _core_utils.readUint16)(data, offset);
|
|
offset += 2;
|
|
var quantizationTablesEnd = quantizationTablesLength + offset - 2;
|
|
var z;
|
|
|
|
while (offset < quantizationTablesEnd) {
|
|
var quantizationTableSpec = data[offset++];
|
|
var tableData = new Uint16Array(64);
|
|
|
|
if (quantizationTableSpec >> 4 === 0) {
|
|
for (j = 0; j < 64; j++) {
|
|
z = dctZigZag[j];
|
|
tableData[z] = data[offset++];
|
|
}
|
|
} else if (quantizationTableSpec >> 4 === 1) {
|
|
for (j = 0; j < 64; j++) {
|
|
z = dctZigZag[j];
|
|
tableData[z] = (0, _core_utils.readUint16)(data, offset);
|
|
offset += 2;
|
|
}
|
|
} else {
|
|
throw new JpegError("DQT - invalid table spec");
|
|
}
|
|
|
|
quantizationTables[quantizationTableSpec & 15] = tableData;
|
|
}
|
|
|
|
break;
|
|
|
|
case 0xffc0:
|
|
case 0xffc1:
|
|
case 0xffc2:
|
|
if (frame) {
|
|
throw new JpegError("Only single frame JPEGs supported");
|
|
}
|
|
|
|
offset += 2;
|
|
frame = {};
|
|
frame.extended = fileMarker === 0xffc1;
|
|
frame.progressive = fileMarker === 0xffc2;
|
|
frame.precision = data[offset++];
|
|
const sofScanLines = (0, _core_utils.readUint16)(data, offset);
|
|
offset += 2;
|
|
frame.scanLines = dnlScanLines || sofScanLines;
|
|
frame.samplesPerLine = (0, _core_utils.readUint16)(data, offset);
|
|
offset += 2;
|
|
frame.components = [];
|
|
frame.componentIds = {};
|
|
var componentsCount = data[offset++],
|
|
componentId;
|
|
var maxH = 0,
|
|
maxV = 0;
|
|
|
|
for (i = 0; i < componentsCount; i++) {
|
|
componentId = data[offset];
|
|
var h = data[offset + 1] >> 4;
|
|
var v = data[offset + 1] & 15;
|
|
|
|
if (maxH < h) {
|
|
maxH = h;
|
|
}
|
|
|
|
if (maxV < v) {
|
|
maxV = v;
|
|
}
|
|
|
|
var qId = data[offset + 2];
|
|
l = frame.components.push({
|
|
h,
|
|
v,
|
|
quantizationId: qId,
|
|
quantizationTable: null
|
|
});
|
|
frame.componentIds[componentId] = l - 1;
|
|
offset += 3;
|
|
}
|
|
|
|
frame.maxH = maxH;
|
|
frame.maxV = maxV;
|
|
prepareComponents(frame);
|
|
break;
|
|
|
|
case 0xffc4:
|
|
const huffmanLength = (0, _core_utils.readUint16)(data, offset);
|
|
offset += 2;
|
|
|
|
for (i = 2; i < huffmanLength;) {
|
|
var huffmanTableSpec = data[offset++];
|
|
var codeLengths = new Uint8Array(16);
|
|
var codeLengthSum = 0;
|
|
|
|
for (j = 0; j < 16; j++, offset++) {
|
|
codeLengthSum += codeLengths[j] = data[offset];
|
|
}
|
|
|
|
var huffmanValues = new Uint8Array(codeLengthSum);
|
|
|
|
for (j = 0; j < codeLengthSum; j++, offset++) {
|
|
huffmanValues[j] = data[offset];
|
|
}
|
|
|
|
i += 17 + codeLengthSum;
|
|
(huffmanTableSpec >> 4 === 0 ? huffmanTablesDC : huffmanTablesAC)[huffmanTableSpec & 15] = buildHuffmanTable(codeLengths, huffmanValues);
|
|
}
|
|
|
|
break;
|
|
|
|
case 0xffdd:
|
|
offset += 2;
|
|
resetInterval = (0, _core_utils.readUint16)(data, offset);
|
|
offset += 2;
|
|
break;
|
|
|
|
case 0xffda:
|
|
const parseDNLMarker = ++numSOSMarkers === 1 && !dnlScanLines;
|
|
offset += 2;
|
|
var selectorsCount = data[offset++];
|
|
var components = [],
|
|
component;
|
|
|
|
for (i = 0; i < selectorsCount; i++) {
|
|
const index = data[offset++];
|
|
var componentIndex = frame.componentIds[index];
|
|
component = frame.components[componentIndex];
|
|
component.index = index;
|
|
var tableSpec = data[offset++];
|
|
component.huffmanTableDC = huffmanTablesDC[tableSpec >> 4];
|
|
component.huffmanTableAC = huffmanTablesAC[tableSpec & 15];
|
|
components.push(component);
|
|
}
|
|
|
|
var spectralStart = data[offset++];
|
|
var spectralEnd = data[offset++];
|
|
var successiveApproximation = data[offset++];
|
|
|
|
try {
|
|
var processed = decodeScan(data, offset, frame, components, resetInterval, spectralStart, spectralEnd, successiveApproximation >> 4, successiveApproximation & 15, parseDNLMarker);
|
|
offset += processed;
|
|
} catch (ex) {
|
|
if (ex instanceof DNLMarkerError) {
|
|
(0, _util.warn)(`${ex.message} -- attempting to re-parse the JPEG image.`);
|
|
return this.parse(data, {
|
|
dnlScanLines: ex.scanLines
|
|
});
|
|
} else if (ex instanceof EOIMarkerError) {
|
|
(0, _util.warn)(`${ex.message} -- ignoring the rest of the image data.`);
|
|
break markerLoop;
|
|
}
|
|
|
|
throw ex;
|
|
}
|
|
|
|
break;
|
|
|
|
case 0xffdc:
|
|
offset += 4;
|
|
break;
|
|
|
|
case 0xffff:
|
|
if (data[offset] !== 0xff) {
|
|
offset--;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
const nextFileMarker = findNextFileMarker(data, offset - 2, offset - 3);
|
|
|
|
if (nextFileMarker && nextFileMarker.invalid) {
|
|
(0, _util.warn)("JpegImage.parse - unexpected data, current marker is: " + nextFileMarker.invalid);
|
|
offset = nextFileMarker.offset;
|
|
break;
|
|
}
|
|
|
|
if (offset >= data.length - 1) {
|
|
(0, _util.warn)("JpegImage.parse - reached the end of the image data " + "without finding an EOI marker (0xFFD9).");
|
|
break markerLoop;
|
|
}
|
|
|
|
throw new JpegError("JpegImage.parse - unknown marker: " + fileMarker.toString(16));
|
|
}
|
|
|
|
fileMarker = (0, _core_utils.readUint16)(data, offset);
|
|
offset += 2;
|
|
}
|
|
|
|
this.width = frame.samplesPerLine;
|
|
this.height = frame.scanLines;
|
|
this.jfif = jfif;
|
|
this.adobe = adobe;
|
|
this.components = [];
|
|
|
|
for (i = 0; i < frame.components.length; i++) {
|
|
component = frame.components[i];
|
|
var quantizationTable = quantizationTables[component.quantizationId];
|
|
|
|
if (quantizationTable) {
|
|
component.quantizationTable = quantizationTable;
|
|
}
|
|
|
|
this.components.push({
|
|
index: component.index,
|
|
output: buildComponentData(frame, component),
|
|
scaleX: component.h / frame.maxH,
|
|
scaleY: component.v / frame.maxV,
|
|
blocksPerLine: component.blocksPerLine,
|
|
blocksPerColumn: component.blocksPerColumn
|
|
});
|
|
}
|
|
|
|
this.numComponents = this.components.length;
|
|
return undefined;
|
|
},
|
|
|
|
_getLinearizedBlockData(width, height, isSourcePDF = false) {
|
|
var scaleX = this.width / width,
|
|
scaleY = this.height / height;
|
|
var component, componentScaleX, componentScaleY, blocksPerScanline;
|
|
var x, y, i, j, k;
|
|
var index;
|
|
var offset = 0;
|
|
var output;
|
|
var numComponents = this.components.length;
|
|
var dataLength = width * height * numComponents;
|
|
var data = new Uint8ClampedArray(dataLength);
|
|
var xScaleBlockOffset = new Uint32Array(width);
|
|
var mask3LSB = 0xfffffff8;
|
|
let lastComponentScaleX;
|
|
|
|
for (i = 0; i < numComponents; i++) {
|
|
component = this.components[i];
|
|
componentScaleX = component.scaleX * scaleX;
|
|
componentScaleY = component.scaleY * scaleY;
|
|
offset = i;
|
|
output = component.output;
|
|
blocksPerScanline = component.blocksPerLine + 1 << 3;
|
|
|
|
if (componentScaleX !== lastComponentScaleX) {
|
|
for (x = 0; x < width; x++) {
|
|
j = 0 | x * componentScaleX;
|
|
xScaleBlockOffset[x] = (j & mask3LSB) << 3 | j & 7;
|
|
}
|
|
|
|
lastComponentScaleX = componentScaleX;
|
|
}
|
|
|
|
for (y = 0; y < height; y++) {
|
|
j = 0 | y * componentScaleY;
|
|
index = blocksPerScanline * (j & mask3LSB) | (j & 7) << 3;
|
|
|
|
for (x = 0; x < width; x++) {
|
|
data[offset] = output[index + xScaleBlockOffset[x]];
|
|
offset += numComponents;
|
|
}
|
|
}
|
|
}
|
|
|
|
let transform = this._decodeTransform;
|
|
|
|
if (!isSourcePDF && numComponents === 4 && !transform) {
|
|
transform = new Int32Array([-256, 255, -256, 255, -256, 255, -256, 255]);
|
|
}
|
|
|
|
if (transform) {
|
|
for (i = 0; i < dataLength;) {
|
|
for (j = 0, k = 0; j < numComponents; j++, i++, k += 2) {
|
|
data[i] = (data[i] * transform[k] >> 8) + transform[k + 1];
|
|
}
|
|
}
|
|
}
|
|
|
|
return data;
|
|
},
|
|
|
|
get _isColorConversionNeeded() {
|
|
if (this.adobe) {
|
|
return !!this.adobe.transformCode;
|
|
}
|
|
|
|
if (this.numComponents === 3) {
|
|
if (this._colorTransform === 0) {
|
|
return false;
|
|
} else if (this.components[0].index === 0x52 && this.components[1].index === 0x47 && this.components[2].index === 0x42) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
if (this._colorTransform === 1) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
},
|
|
|
|
_convertYccToRgb: function convertYccToRgb(data) {
|
|
var Y, Cb, Cr;
|
|
|
|
for (var i = 0, length = data.length; i < length; i += 3) {
|
|
Y = data[i];
|
|
Cb = data[i + 1];
|
|
Cr = data[i + 2];
|
|
data[i] = Y - 179.456 + 1.402 * Cr;
|
|
data[i + 1] = Y + 135.459 - 0.344 * Cb - 0.714 * Cr;
|
|
data[i + 2] = Y - 226.816 + 1.772 * Cb;
|
|
}
|
|
|
|
return data;
|
|
},
|
|
_convertYcckToRgb: function convertYcckToRgb(data) {
|
|
var Y, Cb, Cr, k;
|
|
var offset = 0;
|
|
|
|
for (var i = 0, length = data.length; i < length; i += 4) {
|
|
Y = data[i];
|
|
Cb = data[i + 1];
|
|
Cr = data[i + 2];
|
|
k = data[i + 3];
|
|
data[offset++] = -122.67195406894 + Cb * (-6.60635669420364e-5 * Cb + 0.000437130475926232 * Cr - 5.4080610064599e-5 * Y + 0.00048449797120281 * k - 0.154362151871126) + Cr * (-0.000957964378445773 * Cr + 0.000817076911346625 * Y - 0.00477271405408747 * k + 1.53380253221734) + Y * (0.000961250184130688 * Y - 0.00266257332283933 * k + 0.48357088451265) + k * (-0.000336197177618394 * k + 0.484791561490776);
|
|
data[offset++] = 107.268039397724 + Cb * (2.19927104525741e-5 * Cb - 0.000640992018297945 * Cr + 0.000659397001245577 * Y + 0.000426105652938837 * k - 0.176491792462875) + Cr * (-0.000778269941513683 * Cr + 0.00130872261408275 * Y + 0.000770482631801132 * k - 0.151051492775562) + Y * (0.00126935368114843 * Y - 0.00265090189010898 * k + 0.25802910206845) + k * (-0.000318913117588328 * k - 0.213742400323665);
|
|
data[offset++] = -20.810012546947 + Cb * (-0.000570115196973677 * Cb - 2.63409051004589e-5 * Cr + 0.0020741088115012 * Y - 0.00288260236853442 * k + 0.814272968359295) + Cr * (-1.53496057440975e-5 * Cr - 0.000132689043961446 * Y + 0.000560833691242812 * k - 0.195152027534049) + Y * (0.00174418132927582 * Y - 0.00255243321439347 * k + 0.116935020465145) + k * (-0.000343531996510555 * k + 0.24165260232407);
|
|
}
|
|
|
|
return data.subarray(0, offset);
|
|
},
|
|
_convertYcckToCmyk: function convertYcckToCmyk(data) {
|
|
var Y, Cb, Cr;
|
|
|
|
for (var i = 0, length = data.length; i < length; i += 4) {
|
|
Y = data[i];
|
|
Cb = data[i + 1];
|
|
Cr = data[i + 2];
|
|
data[i] = 434.456 - Y - 1.402 * Cr;
|
|
data[i + 1] = 119.541 - Y + 0.344 * Cb + 0.714 * Cr;
|
|
data[i + 2] = 481.816 - Y - 1.772 * Cb;
|
|
}
|
|
|
|
return data;
|
|
},
|
|
_convertCmykToRgb: function convertCmykToRgb(data) {
|
|
var c, m, y, k;
|
|
var offset = 0;
|
|
|
|
for (var i = 0, length = data.length; i < length; i += 4) {
|
|
c = data[i];
|
|
m = data[i + 1];
|
|
y = data[i + 2];
|
|
k = data[i + 3];
|
|
data[offset++] = 255 + c * (-0.00006747147073602441 * c + 0.0008379262121013727 * m + 0.0002894718188643294 * y + 0.003264231057537806 * k - 1.1185611867203937) + m * (0.000026374107616089405 * m - 0.00008626949158638572 * y - 0.0002748769067499491 * k - 0.02155688794978967) + y * (-0.00003878099212869363 * y - 0.0003267808279485286 * k + 0.0686742238595345) - k * (0.0003361971776183937 * k + 0.7430659151342254);
|
|
data[offset++] = 255 + c * (0.00013596372813588848 * c + 0.000924537132573585 * m + 0.00010567359618683593 * y + 0.0004791864687436512 * k - 0.3109689587515875) + m * (-0.00023545346108370344 * m + 0.0002702845253534714 * y + 0.0020200308977307156 * k - 0.7488052167015494) + y * (0.00006834815998235662 * y + 0.00015168452363460973 * k - 0.09751927774728933) - k * (0.00031891311758832814 * k + 0.7364883807733168);
|
|
data[offset++] = 255 + c * (0.000013598650411385307 * c + 0.00012423956175490851 * m + 0.0004751985097583589 * y - 0.0000036729317476630422 * k - 0.05562186980264034) + m * (0.00016141380598724676 * m + 0.0009692239130725186 * y + 0.0007782692450036253 * k - 0.44015232367526463) + y * (5.068882914068769e-7 * y + 0.0017778369011375071 * k - 0.7591454649749609) - k * (0.0003435319965105553 * k + 0.7063770186160144);
|
|
}
|
|
|
|
return data.subarray(0, offset);
|
|
},
|
|
|
|
getData({
|
|
width,
|
|
height,
|
|
forceRGB = false,
|
|
isSourcePDF = false
|
|
}) {
|
|
if (this.numComponents > 4) {
|
|
throw new JpegError("Unsupported color mode");
|
|
}
|
|
|
|
var data = this._getLinearizedBlockData(width, height, isSourcePDF);
|
|
|
|
if (this.numComponents === 1 && forceRGB) {
|
|
var dataLength = data.length;
|
|
var rgbData = new Uint8ClampedArray(dataLength * 3);
|
|
var offset = 0;
|
|
|
|
for (var i = 0; i < dataLength; i++) {
|
|
var grayColor = data[i];
|
|
rgbData[offset++] = grayColor;
|
|
rgbData[offset++] = grayColor;
|
|
rgbData[offset++] = grayColor;
|
|
}
|
|
|
|
return rgbData;
|
|
} else if (this.numComponents === 3 && this._isColorConversionNeeded) {
|
|
return this._convertYccToRgb(data);
|
|
} else if (this.numComponents === 4) {
|
|
if (this._isColorConversionNeeded) {
|
|
if (forceRGB) {
|
|
return this._convertYcckToRgb(data);
|
|
}
|
|
|
|
return this._convertYcckToCmyk(data);
|
|
} else if (forceRGB) {
|
|
return this._convertCmykToRgb(data);
|
|
}
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
};
|
|
return JpegImage;
|
|
}();
|
|
|
|
exports.JpegImage = JpegImage;
|
|
|
|
/***/ }),
|
|
/* 9 */
|
|
/***/ (function(module, exports, __w_pdfjs_require__) {
|
|
|
|
"use strict";
|
|
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.JpxImage = void 0;
|
|
|
|
var _util = __w_pdfjs_require__(1);
|
|
|
|
var _core_utils = __w_pdfjs_require__(5);
|
|
|
|
var _arithmetic_decoder = __w_pdfjs_require__(6);
|
|
|
|
class JpxError extends _util.BaseException {
|
|
constructor(msg) {
|
|
super(`JPX error: ${msg}`);
|
|
}
|
|
|
|
}
|
|
|
|
var JpxImage = function JpxImageClosure() {
|
|
var SubbandsGainLog2 = {
|
|
LL: 0,
|
|
LH: 1,
|
|
HL: 1,
|
|
HH: 2
|
|
};
|
|
|
|
function JpxImage() {
|
|
this.failOnCorruptedImage = false;
|
|
}
|
|
|
|
JpxImage.prototype = {
|
|
parse: function JpxImage_parse(data) {
|
|
var head = (0, _core_utils.readUint16)(data, 0);
|
|
|
|
if (head === 0xff4f) {
|
|
this.parseCodestream(data, 0, data.length);
|
|
return;
|
|
}
|
|
|
|
var position = 0,
|
|
length = data.length;
|
|
|
|
while (position < length) {
|
|
var headerSize = 8;
|
|
var lbox = (0, _core_utils.readUint32)(data, position);
|
|
var tbox = (0, _core_utils.readUint32)(data, position + 4);
|
|
position += headerSize;
|
|
|
|
if (lbox === 1) {
|
|
lbox = (0, _core_utils.readUint32)(data, position) * 4294967296 + (0, _core_utils.readUint32)(data, position + 4);
|
|
position += 8;
|
|
headerSize += 8;
|
|
}
|
|
|
|
if (lbox === 0) {
|
|
lbox = length - position + headerSize;
|
|
}
|
|
|
|
if (lbox < headerSize) {
|
|
throw new JpxError("Invalid box field size");
|
|
}
|
|
|
|
var dataLength = lbox - headerSize;
|
|
var jumpDataLength = true;
|
|
|
|
switch (tbox) {
|
|
case 0x6a703268:
|
|
jumpDataLength = false;
|
|
break;
|
|
|
|
case 0x636f6c72:
|
|
var method = data[position];
|
|
|
|
if (method === 1) {
|
|
var colorspace = (0, _core_utils.readUint32)(data, position + 3);
|
|
|
|
switch (colorspace) {
|
|
case 16:
|
|
case 17:
|
|
case 18:
|
|
break;
|
|
|
|
default:
|
|
(0, _util.warn)("Unknown colorspace " + colorspace);
|
|
break;
|
|
}
|
|
} else if (method === 2) {
|
|
(0, _util.info)("ICC profile not supported");
|
|
}
|
|
|
|
break;
|
|
|
|
case 0x6a703263:
|
|
this.parseCodestream(data, position, position + dataLength);
|
|
break;
|
|
|
|
case 0x6a502020:
|
|
if ((0, _core_utils.readUint32)(data, position) !== 0x0d0a870a) {
|
|
(0, _util.warn)("Invalid JP2 signature");
|
|
}
|
|
|
|
break;
|
|
|
|
case 0x6a501a1a:
|
|
case 0x66747970:
|
|
case 0x72726571:
|
|
case 0x72657320:
|
|
case 0x69686472:
|
|
break;
|
|
|
|
default:
|
|
var headerType = String.fromCharCode(tbox >> 24 & 0xff, tbox >> 16 & 0xff, tbox >> 8 & 0xff, tbox & 0xff);
|
|
(0, _util.warn)("Unsupported header type " + tbox + " (" + headerType + ")");
|
|
break;
|
|
}
|
|
|
|
if (jumpDataLength) {
|
|
position += dataLength;
|
|
}
|
|
}
|
|
},
|
|
parseImageProperties: function JpxImage_parseImageProperties(stream) {
|
|
var newByte = stream.getByte();
|
|
|
|
while (newByte >= 0) {
|
|
var oldByte = newByte;
|
|
newByte = stream.getByte();
|
|
var code = oldByte << 8 | newByte;
|
|
|
|
if (code === 0xff51) {
|
|
stream.skip(4);
|
|
var Xsiz = stream.getInt32() >>> 0;
|
|
var Ysiz = stream.getInt32() >>> 0;
|
|
var XOsiz = stream.getInt32() >>> 0;
|
|
var YOsiz = stream.getInt32() >>> 0;
|
|
stream.skip(16);
|
|
var Csiz = stream.getUint16();
|
|
this.width = Xsiz - XOsiz;
|
|
this.height = Ysiz - YOsiz;
|
|
this.componentsCount = Csiz;
|
|
this.bitsPerComponent = 8;
|
|
return;
|
|
}
|
|
}
|
|
|
|
throw new JpxError("No size marker found in JPX stream");
|
|
},
|
|
parseCodestream: function JpxImage_parseCodestream(data, start, end) {
|
|
var context = {};
|
|
var doNotRecover = false;
|
|
|
|
try {
|
|
var position = start;
|
|
|
|
while (position + 1 < end) {
|
|
var code = (0, _core_utils.readUint16)(data, position);
|
|
position += 2;
|
|
var length = 0,
|
|
j,
|
|
sqcd,
|
|
spqcds,
|
|
spqcdSize,
|
|
scalarExpounded,
|
|
tile;
|
|
|
|
switch (code) {
|
|
case 0xff4f:
|
|
context.mainHeader = true;
|
|
break;
|
|
|
|
case 0xffd9:
|
|
break;
|
|
|
|
case 0xff51:
|
|
length = (0, _core_utils.readUint16)(data, position);
|
|
var siz = {};
|
|
siz.Xsiz = (0, _core_utils.readUint32)(data, position + 4);
|
|
siz.Ysiz = (0, _core_utils.readUint32)(data, position + 8);
|
|
siz.XOsiz = (0, _core_utils.readUint32)(data, position + 12);
|
|
siz.YOsiz = (0, _core_utils.readUint32)(data, position + 16);
|
|
siz.XTsiz = (0, _core_utils.readUint32)(data, position + 20);
|
|
siz.YTsiz = (0, _core_utils.readUint32)(data, position + 24);
|
|
siz.XTOsiz = (0, _core_utils.readUint32)(data, position + 28);
|
|
siz.YTOsiz = (0, _core_utils.readUint32)(data, position + 32);
|
|
var componentsCount = (0, _core_utils.readUint16)(data, position + 36);
|
|
siz.Csiz = componentsCount;
|
|
var components = [];
|
|
j = position + 38;
|
|
|
|
for (var i = 0; i < componentsCount; i++) {
|
|
var component = {
|
|
precision: (data[j] & 0x7f) + 1,
|
|
isSigned: !!(data[j] & 0x80),
|
|
XRsiz: data[j + 1],
|
|
YRsiz: data[j + 2]
|
|
};
|
|
j += 3;
|
|
calculateComponentDimensions(component, siz);
|
|
components.push(component);
|
|
}
|
|
|
|
context.SIZ = siz;
|
|
context.components = components;
|
|
calculateTileGrids(context, components);
|
|
context.QCC = [];
|
|
context.COC = [];
|
|
break;
|
|
|
|
case 0xff5c:
|
|
length = (0, _core_utils.readUint16)(data, position);
|
|
var qcd = {};
|
|
j = position + 2;
|
|
sqcd = data[j++];
|
|
|
|
switch (sqcd & 0x1f) {
|
|
case 0:
|
|
spqcdSize = 8;
|
|
scalarExpounded = true;
|
|
break;
|
|
|
|
case 1:
|
|
spqcdSize = 16;
|
|
scalarExpounded = false;
|
|
break;
|
|
|
|
case 2:
|
|
spqcdSize = 16;
|
|
scalarExpounded = true;
|
|
break;
|
|
|
|
default:
|
|
throw new Error("Invalid SQcd value " + sqcd);
|
|
}
|
|
|
|
qcd.noQuantization = spqcdSize === 8;
|
|
qcd.scalarExpounded = scalarExpounded;
|
|
qcd.guardBits = sqcd >> 5;
|
|
spqcds = [];
|
|
|
|
while (j < length + position) {
|
|
var spqcd = {};
|
|
|
|
if (spqcdSize === 8) {
|
|
spqcd.epsilon = data[j++] >> 3;
|
|
spqcd.mu = 0;
|
|
} else {
|
|
spqcd.epsilon = data[j] >> 3;
|
|
spqcd.mu = (data[j] & 0x7) << 8 | data[j + 1];
|
|
j += 2;
|
|
}
|
|
|
|
spqcds.push(spqcd);
|
|
}
|
|
|
|
qcd.SPqcds = spqcds;
|
|
|
|
if (context.mainHeader) {
|
|
context.QCD = qcd;
|
|
} else {
|
|
context.currentTile.QCD = qcd;
|
|
context.currentTile.QCC = [];
|
|
}
|
|
|
|
break;
|
|
|
|
case 0xff5d:
|
|
length = (0, _core_utils.readUint16)(data, position);
|
|
var qcc = {};
|
|
j = position + 2;
|
|
var cqcc;
|
|
|
|
if (context.SIZ.Csiz < 257) {
|
|
cqcc = data[j++];
|
|
} else {
|
|
cqcc = (0, _core_utils.readUint16)(data, j);
|
|
j += 2;
|
|
}
|
|
|
|
sqcd = data[j++];
|
|
|
|
switch (sqcd & 0x1f) {
|
|
case 0:
|
|
spqcdSize = 8;
|
|
scalarExpounded = true;
|
|
break;
|
|
|
|
case 1:
|
|
spqcdSize = 16;
|
|
scalarExpounded = false;
|
|
break;
|
|
|
|
case 2:
|
|
spqcdSize = 16;
|
|
scalarExpounded = true;
|
|
break;
|
|
|
|
default:
|
|
throw new Error("Invalid SQcd value " + sqcd);
|
|
}
|
|
|
|
qcc.noQuantization = spqcdSize === 8;
|
|
qcc.scalarExpounded = scalarExpounded;
|
|
qcc.guardBits = sqcd >> 5;
|
|
spqcds = [];
|
|
|
|
while (j < length + position) {
|
|
spqcd = {};
|
|
|
|
if (spqcdSize === 8) {
|
|
spqcd.epsilon = data[j++] >> 3;
|
|
spqcd.mu = 0;
|
|
} else {
|
|
spqcd.epsilon = data[j] >> 3;
|
|
spqcd.mu = (data[j] & 0x7) << 8 | data[j + 1];
|
|
j += 2;
|
|
}
|
|
|
|
spqcds.push(spqcd);
|
|
}
|
|
|
|
qcc.SPqcds = spqcds;
|
|
|
|
if (context.mainHeader) {
|
|
context.QCC[cqcc] = qcc;
|
|
} else {
|
|
context.currentTile.QCC[cqcc] = qcc;
|
|
}
|
|
|
|
break;
|
|
|
|
case 0xff52:
|
|
length = (0, _core_utils.readUint16)(data, position);
|
|
var cod = {};
|
|
j = position + 2;
|
|
var scod = data[j++];
|
|
cod.entropyCoderWithCustomPrecincts = !!(scod & 1);
|
|
cod.sopMarkerUsed = !!(scod & 2);
|
|
cod.ephMarkerUsed = !!(scod & 4);
|
|
cod.progressionOrder = data[j++];
|
|
cod.layersCount = (0, _core_utils.readUint16)(data, j);
|
|
j += 2;
|
|
cod.multipleComponentTransform = data[j++];
|
|
cod.decompositionLevelsCount = data[j++];
|
|
cod.xcb = (data[j++] & 0xf) + 2;
|
|
cod.ycb = (data[j++] & 0xf) + 2;
|
|
var blockStyle = data[j++];
|
|
cod.selectiveArithmeticCodingBypass = !!(blockStyle & 1);
|
|
cod.resetContextProbabilities = !!(blockStyle & 2);
|
|
cod.terminationOnEachCodingPass = !!(blockStyle & 4);
|
|
cod.verticallyStripe = !!(blockStyle & 8);
|
|
cod.predictableTermination = !!(blockStyle & 16);
|
|
cod.segmentationSymbolUsed = !!(blockStyle & 32);
|
|
cod.reversibleTransformation = data[j++];
|
|
|
|
if (cod.entropyCoderWithCustomPrecincts) {
|
|
var precinctsSizes = [];
|
|
|
|
while (j < length + position) {
|
|
var precinctsSize = data[j++];
|
|
precinctsSizes.push({
|
|
PPx: precinctsSize & 0xf,
|
|
PPy: precinctsSize >> 4
|
|
});
|
|
}
|
|
|
|
cod.precinctsSizes = precinctsSizes;
|
|
}
|
|
|
|
var unsupported = [];
|
|
|
|
if (cod.selectiveArithmeticCodingBypass) {
|
|
unsupported.push("selectiveArithmeticCodingBypass");
|
|
}
|
|
|
|
if (cod.resetContextProbabilities) {
|
|
unsupported.push("resetContextProbabilities");
|
|
}
|
|
|
|
if (cod.terminationOnEachCodingPass) {
|
|
unsupported.push("terminationOnEachCodingPass");
|
|
}
|
|
|
|
if (cod.verticallyStripe) {
|
|
unsupported.push("verticallyStripe");
|
|
}
|
|
|
|
if (cod.predictableTermination) {
|
|
unsupported.push("predictableTermination");
|
|
}
|
|
|
|
if (unsupported.length > 0) {
|
|
doNotRecover = true;
|
|
throw new Error("Unsupported COD options (" + unsupported.join(", ") + ")");
|
|
}
|
|
|
|
if (context.mainHeader) {
|
|
context.COD = cod;
|
|
} else {
|
|
context.currentTile.COD = cod;
|
|
context.currentTile.COC = [];
|
|
}
|
|
|
|
break;
|
|
|
|
case 0xff90:
|
|
length = (0, _core_utils.readUint16)(data, position);
|
|
tile = {};
|
|
tile.index = (0, _core_utils.readUint16)(data, position + 2);
|
|
tile.length = (0, _core_utils.readUint32)(data, position + 4);
|
|
tile.dataEnd = tile.length + position - 2;
|
|
tile.partIndex = data[position + 8];
|
|
tile.partsCount = data[position + 9];
|
|
context.mainHeader = false;
|
|
|
|
if (tile.partIndex === 0) {
|
|
tile.COD = context.COD;
|
|
tile.COC = context.COC.slice(0);
|
|
tile.QCD = context.QCD;
|
|
tile.QCC = context.QCC.slice(0);
|
|
}
|
|
|
|
context.currentTile = tile;
|
|
break;
|
|
|
|
case 0xff93:
|
|
tile = context.currentTile;
|
|
|
|
if (tile.partIndex === 0) {
|
|
initializeTile(context, tile.index);
|
|
buildPackets(context);
|
|
}
|
|
|
|
length = tile.dataEnd - position;
|
|
parseTilePackets(context, data, position, length);
|
|
break;
|
|
|
|
case 0xff55:
|
|
case 0xff57:
|
|
case 0xff58:
|
|
case 0xff64:
|
|
length = (0, _core_utils.readUint16)(data, position);
|
|
break;
|
|
|
|
case 0xff53:
|
|
throw new Error("Codestream code 0xFF53 (COC) is not implemented");
|
|
|
|
default:
|
|
throw new Error("Unknown codestream code: " + code.toString(16));
|
|
}
|
|
|
|
position += length;
|
|
}
|
|
} catch (e) {
|
|
if (doNotRecover || this.failOnCorruptedImage) {
|
|
throw new JpxError(e.message);
|
|
} else {
|
|
(0, _util.warn)("JPX: Trying to recover from: " + e.message);
|
|
}
|
|
}
|
|
|
|
this.tiles = transformComponents(context);
|
|
this.width = context.SIZ.Xsiz - context.SIZ.XOsiz;
|
|
this.height = context.SIZ.Ysiz - context.SIZ.YOsiz;
|
|
this.componentsCount = context.SIZ.Csiz;
|
|
}
|
|
};
|
|
|
|
function calculateComponentDimensions(component, siz) {
|
|
component.x0 = Math.ceil(siz.XOsiz / component.XRsiz);
|
|
component.x1 = Math.ceil(siz.Xsiz / component.XRsiz);
|
|
component.y0 = Math.ceil(siz.YOsiz / component.YRsiz);
|
|
component.y1 = Math.ceil(siz.Ysiz / component.YRsiz);
|
|
component.width = component.x1 - component.x0;
|
|
component.height = component.y1 - component.y0;
|
|
}
|
|
|
|
function calculateTileGrids(context, components) {
|
|
var siz = context.SIZ;
|
|
var tile,
|
|
tiles = [];
|
|
var numXtiles = Math.ceil((siz.Xsiz - siz.XTOsiz) / siz.XTsiz);
|
|
var numYtiles = Math.ceil((siz.Ysiz - siz.YTOsiz) / siz.YTsiz);
|
|
|
|
for (var q = 0; q < numYtiles; q++) {
|
|
for (var p = 0; p < numXtiles; p++) {
|
|
tile = {};
|
|
tile.tx0 = Math.max(siz.XTOsiz + p * siz.XTsiz, siz.XOsiz);
|
|
tile.ty0 = Math.max(siz.YTOsiz + q * siz.YTsiz, siz.YOsiz);
|
|
tile.tx1 = Math.min(siz.XTOsiz + (p + 1) * siz.XTsiz, siz.Xsiz);
|
|
tile.ty1 = Math.min(siz.YTOsiz + (q + 1) * siz.YTsiz, siz.Ysiz);
|
|
tile.width = tile.tx1 - tile.tx0;
|
|
tile.height = tile.ty1 - tile.ty0;
|
|
tile.components = [];
|
|
tiles.push(tile);
|
|
}
|
|
}
|
|
|
|
context.tiles = tiles;
|
|
var componentsCount = siz.Csiz;
|
|
|
|
for (var i = 0, ii = componentsCount; i < ii; i++) {
|
|
var component = components[i];
|
|
|
|
for (var j = 0, jj = tiles.length; j < jj; j++) {
|
|
var tileComponent = {};
|
|
tile = tiles[j];
|
|
tileComponent.tcx0 = Math.ceil(tile.tx0 / component.XRsiz);
|
|
tileComponent.tcy0 = Math.ceil(tile.ty0 / component.YRsiz);
|
|
tileComponent.tcx1 = Math.ceil(tile.tx1 / component.XRsiz);
|
|
tileComponent.tcy1 = Math.ceil(tile.ty1 / component.YRsiz);
|
|
tileComponent.width = tileComponent.tcx1 - tileComponent.tcx0;
|
|
tileComponent.height = tileComponent.tcy1 - tileComponent.tcy0;
|
|
tile.components[i] = tileComponent;
|
|
}
|
|
}
|
|
}
|
|
|
|
function getBlocksDimensions(context, component, r) {
|
|
var codOrCoc = component.codingStyleParameters;
|
|
var result = {};
|
|
|
|
if (!codOrCoc.entropyCoderWithCustomPrecincts) {
|
|
result.PPx = 15;
|
|
result.PPy = 15;
|
|
} else {
|
|
result.PPx = codOrCoc.precinctsSizes[r].PPx;
|
|
result.PPy = codOrCoc.precinctsSizes[r].PPy;
|
|
}
|
|
|
|
result.xcb_ = r > 0 ? Math.min(codOrCoc.xcb, result.PPx - 1) : Math.min(codOrCoc.xcb, result.PPx);
|
|
result.ycb_ = r > 0 ? Math.min(codOrCoc.ycb, result.PPy - 1) : Math.min(codOrCoc.ycb, result.PPy);
|
|
return result;
|
|
}
|
|
|
|
function buildPrecincts(context, resolution, dimensions) {
|
|
var precinctWidth = 1 << dimensions.PPx;
|
|
var precinctHeight = 1 << dimensions.PPy;
|
|
var isZeroRes = resolution.resLevel === 0;
|
|
var precinctWidthInSubband = 1 << dimensions.PPx + (isZeroRes ? 0 : -1);
|
|
var precinctHeightInSubband = 1 << dimensions.PPy + (isZeroRes ? 0 : -1);
|
|
var numprecinctswide = resolution.trx1 > resolution.trx0 ? Math.ceil(resolution.trx1 / precinctWidth) - Math.floor(resolution.trx0 / precinctWidth) : 0;
|
|
var numprecinctshigh = resolution.try1 > resolution.try0 ? Math.ceil(resolution.try1 / precinctHeight) - Math.floor(resolution.try0 / precinctHeight) : 0;
|
|
var numprecincts = numprecinctswide * numprecinctshigh;
|
|
resolution.precinctParameters = {
|
|
precinctWidth,
|
|
precinctHeight,
|
|
numprecinctswide,
|
|
numprecinctshigh,
|
|
numprecincts,
|
|
precinctWidthInSubband,
|
|
precinctHeightInSubband
|
|
};
|
|
}
|
|
|
|
function buildCodeblocks(context, subband, dimensions) {
|
|
var xcb_ = dimensions.xcb_;
|
|
var ycb_ = dimensions.ycb_;
|
|
var codeblockWidth = 1 << xcb_;
|
|
var codeblockHeight = 1 << ycb_;
|
|
var cbx0 = subband.tbx0 >> xcb_;
|
|
var cby0 = subband.tby0 >> ycb_;
|
|
var cbx1 = subband.tbx1 + codeblockWidth - 1 >> xcb_;
|
|
var cby1 = subband.tby1 + codeblockHeight - 1 >> ycb_;
|
|
var precinctParameters = subband.resolution.precinctParameters;
|
|
var codeblocks = [];
|
|
var precincts = [];
|
|
var i, j, codeblock, precinctNumber;
|
|
|
|
for (j = cby0; j < cby1; j++) {
|
|
for (i = cbx0; i < cbx1; i++) {
|
|
codeblock = {
|
|
cbx: i,
|
|
cby: j,
|
|
tbx0: codeblockWidth * i,
|
|
tby0: codeblockHeight * j,
|
|
tbx1: codeblockWidth * (i + 1),
|
|
tby1: codeblockHeight * (j + 1)
|
|
};
|
|
codeblock.tbx0_ = Math.max(subband.tbx0, codeblock.tbx0);
|
|
codeblock.tby0_ = Math.max(subband.tby0, codeblock.tby0);
|
|
codeblock.tbx1_ = Math.min(subband.tbx1, codeblock.tbx1);
|
|
codeblock.tby1_ = Math.min(subband.tby1, codeblock.tby1);
|
|
var pi = Math.floor((codeblock.tbx0_ - subband.tbx0) / precinctParameters.precinctWidthInSubband);
|
|
var pj = Math.floor((codeblock.tby0_ - subband.tby0) / precinctParameters.precinctHeightInSubband);
|
|
precinctNumber = pi + pj * precinctParameters.numprecinctswide;
|
|
codeblock.precinctNumber = precinctNumber;
|
|
codeblock.subbandType = subband.type;
|
|
codeblock.Lblock = 3;
|
|
|
|
if (codeblock.tbx1_ <= codeblock.tbx0_ || codeblock.tby1_ <= codeblock.tby0_) {
|
|
continue;
|
|
}
|
|
|
|
codeblocks.push(codeblock);
|
|
var precinct = precincts[precinctNumber];
|
|
|
|
if (precinct !== undefined) {
|
|
if (i < precinct.cbxMin) {
|
|
precinct.cbxMin = i;
|
|
} else if (i > precinct.cbxMax) {
|
|
precinct.cbxMax = i;
|
|
}
|
|
|
|
if (j < precinct.cbyMin) {
|
|
precinct.cbxMin = j;
|
|
} else if (j > precinct.cbyMax) {
|
|
precinct.cbyMax = j;
|
|
}
|
|
} else {
|
|
precincts[precinctNumber] = precinct = {
|
|
cbxMin: i,
|
|
cbyMin: j,
|
|
cbxMax: i,
|
|
cbyMax: j
|
|
};
|
|
}
|
|
|
|
codeblock.precinct = precinct;
|
|
}
|
|
}
|
|
|
|
subband.codeblockParameters = {
|
|
codeblockWidth: xcb_,
|
|
codeblockHeight: ycb_,
|
|
numcodeblockwide: cbx1 - cbx0 + 1,
|
|
numcodeblockhigh: cby1 - cby0 + 1
|
|
};
|
|
subband.codeblocks = codeblocks;
|
|
subband.precincts = precincts;
|
|
}
|
|
|
|
function createPacket(resolution, precinctNumber, layerNumber) {
|
|
var precinctCodeblocks = [];
|
|
var subbands = resolution.subbands;
|
|
|
|
for (var i = 0, ii = subbands.length; i < ii; i++) {
|
|
var subband = subbands[i];
|
|
var codeblocks = subband.codeblocks;
|
|
|
|
for (var j = 0, jj = codeblocks.length; j < jj; j++) {
|
|
var codeblock = codeblocks[j];
|
|
|
|
if (codeblock.precinctNumber !== precinctNumber) {
|
|
continue;
|
|
}
|
|
|
|
precinctCodeblocks.push(codeblock);
|
|
}
|
|
}
|
|
|
|
return {
|
|
layerNumber,
|
|
codeblocks: precinctCodeblocks
|
|
};
|
|
}
|
|
|
|
function LayerResolutionComponentPositionIterator(context) {
|
|
var siz = context.SIZ;
|
|
var tileIndex = context.currentTile.index;
|
|
var tile = context.tiles[tileIndex];
|
|
var layersCount = tile.codingStyleDefaultParameters.layersCount;
|
|
var componentsCount = siz.Csiz;
|
|
var maxDecompositionLevelsCount = 0;
|
|
|
|
for (var q = 0; q < componentsCount; q++) {
|
|
maxDecompositionLevelsCount = Math.max(maxDecompositionLevelsCount, tile.components[q].codingStyleParameters.decompositionLevelsCount);
|
|
}
|
|
|
|
var l = 0,
|
|
r = 0,
|
|
i = 0,
|
|
k = 0;
|
|
|
|
this.nextPacket = function JpxImage_nextPacket() {
|
|
for (; l < layersCount; l++) {
|
|
for (; r <= maxDecompositionLevelsCount; r++) {
|
|
for (; i < componentsCount; i++) {
|
|
var component = tile.components[i];
|
|
|
|
if (r > component.codingStyleParameters.decompositionLevelsCount) {
|
|
continue;
|
|
}
|
|
|
|
var resolution = component.resolutions[r];
|
|
var numprecincts = resolution.precinctParameters.numprecincts;
|
|
|
|
for (; k < numprecincts;) {
|
|
var packet = createPacket(resolution, k, l);
|
|
k++;
|
|
return packet;
|
|
}
|
|
|
|
k = 0;
|
|
}
|
|
|
|
i = 0;
|
|
}
|
|
|
|
r = 0;
|
|
}
|
|
|
|
throw new JpxError("Out of packets");
|
|
};
|
|
}
|
|
|
|
function ResolutionLayerComponentPositionIterator(context) {
|
|
var siz = context.SIZ;
|
|
var tileIndex = context.currentTile.index;
|
|
var tile = context.tiles[tileIndex];
|
|
var layersCount = tile.codingStyleDefaultParameters.layersCount;
|
|
var componentsCount = siz.Csiz;
|
|
var maxDecompositionLevelsCount = 0;
|
|
|
|
for (var q = 0; q < componentsCount; q++) {
|
|
maxDecompositionLevelsCount = Math.max(maxDecompositionLevelsCount, tile.components[q].codingStyleParameters.decompositionLevelsCount);
|
|
}
|
|
|
|
var r = 0,
|
|
l = 0,
|
|
i = 0,
|
|
k = 0;
|
|
|
|
this.nextPacket = function JpxImage_nextPacket() {
|
|
for (; r <= maxDecompositionLevelsCount; r++) {
|
|
for (; l < layersCount; l++) {
|
|
for (; i < componentsCount; i++) {
|
|
var component = tile.components[i];
|
|
|
|
if (r > component.codingStyleParameters.decompositionLevelsCount) {
|
|
continue;
|
|
}
|
|
|
|
var resolution = component.resolutions[r];
|
|
var numprecincts = resolution.precinctParameters.numprecincts;
|
|
|
|
for (; k < numprecincts;) {
|
|
var packet = createPacket(resolution, k, l);
|
|
k++;
|
|
return packet;
|
|
}
|
|
|
|
k = 0;
|
|
}
|
|
|
|
i = 0;
|
|
}
|
|
|
|
l = 0;
|
|
}
|
|
|
|
throw new JpxError("Out of packets");
|
|
};
|
|
}
|
|
|
|
function ResolutionPositionComponentLayerIterator(context) {
|
|
var siz = context.SIZ;
|
|
var tileIndex = context.currentTile.index;
|
|
var tile = context.tiles[tileIndex];
|
|
var layersCount = tile.codingStyleDefaultParameters.layersCount;
|
|
var componentsCount = siz.Csiz;
|
|
var l, r, c, p;
|
|
var maxDecompositionLevelsCount = 0;
|
|
|
|
for (c = 0; c < componentsCount; c++) {
|
|
const component = tile.components[c];
|
|
maxDecompositionLevelsCount = Math.max(maxDecompositionLevelsCount, component.codingStyleParameters.decompositionLevelsCount);
|
|
}
|
|
|
|
var maxNumPrecinctsInLevel = new Int32Array(maxDecompositionLevelsCount + 1);
|
|
|
|
for (r = 0; r <= maxDecompositionLevelsCount; ++r) {
|
|
var maxNumPrecincts = 0;
|
|
|
|
for (c = 0; c < componentsCount; ++c) {
|
|
var resolutions = tile.components[c].resolutions;
|
|
|
|
if (r < resolutions.length) {
|
|
maxNumPrecincts = Math.max(maxNumPrecincts, resolutions[r].precinctParameters.numprecincts);
|
|
}
|
|
}
|
|
|
|
maxNumPrecinctsInLevel[r] = maxNumPrecincts;
|
|
}
|
|
|
|
l = 0;
|
|
r = 0;
|
|
c = 0;
|
|
p = 0;
|
|
|
|
this.nextPacket = function JpxImage_nextPacket() {
|
|
for (; r <= maxDecompositionLevelsCount; r++) {
|
|
for (; p < maxNumPrecinctsInLevel[r]; p++) {
|
|
for (; c < componentsCount; c++) {
|
|
const component = tile.components[c];
|
|
|
|
if (r > component.codingStyleParameters.decompositionLevelsCount) {
|
|
continue;
|
|
}
|
|
|
|
var resolution = component.resolutions[r];
|
|
var numprecincts = resolution.precinctParameters.numprecincts;
|
|
|
|
if (p >= numprecincts) {
|
|
continue;
|
|
}
|
|
|
|
for (; l < layersCount;) {
|
|
var packet = createPacket(resolution, p, l);
|
|
l++;
|
|
return packet;
|
|
}
|
|
|
|
l = 0;
|
|
}
|
|
|
|
c = 0;
|
|
}
|
|
|
|
p = 0;
|
|
}
|
|
|
|
throw new JpxError("Out of packets");
|
|
};
|
|
}
|
|
|
|
function PositionComponentResolutionLayerIterator(context) {
|
|
var siz = context.SIZ;
|
|
var tileIndex = context.currentTile.index;
|
|
var tile = context.tiles[tileIndex];
|
|
var layersCount = tile.codingStyleDefaultParameters.layersCount;
|
|
var componentsCount = siz.Csiz;
|
|
var precinctsSizes = getPrecinctSizesInImageScale(tile);
|
|
var precinctsIterationSizes = precinctsSizes;
|
|
var l = 0,
|
|
r = 0,
|
|
c = 0,
|
|
px = 0,
|
|
py = 0;
|
|
|
|
this.nextPacket = function JpxImage_nextPacket() {
|
|
for (; py < precinctsIterationSizes.maxNumHigh; py++) {
|
|
for (; px < precinctsIterationSizes.maxNumWide; px++) {
|
|
for (; c < componentsCount; c++) {
|
|
var component = tile.components[c];
|
|
var decompositionLevelsCount = component.codingStyleParameters.decompositionLevelsCount;
|
|
|
|
for (; r <= decompositionLevelsCount; r++) {
|
|
var resolution = component.resolutions[r];
|
|
var sizeInImageScale = precinctsSizes.components[c].resolutions[r];
|
|
var k = getPrecinctIndexIfExist(px, py, sizeInImageScale, precinctsIterationSizes, resolution);
|
|
|
|
if (k === null) {
|
|
continue;
|
|
}
|
|
|
|
for (; l < layersCount;) {
|
|
var packet = createPacket(resolution, k, l);
|
|
l++;
|
|
return packet;
|
|
}
|
|
|
|
l = 0;
|
|
}
|
|
|
|
r = 0;
|
|
}
|
|
|
|
c = 0;
|
|
}
|
|
|
|
px = 0;
|
|
}
|
|
|
|
throw new JpxError("Out of packets");
|
|
};
|
|
}
|
|
|
|
function ComponentPositionResolutionLayerIterator(context) {
|
|
var siz = context.SIZ;
|
|
var tileIndex = context.currentTile.index;
|
|
var tile = context.tiles[tileIndex];
|
|
var layersCount = tile.codingStyleDefaultParameters.layersCount;
|
|
var componentsCount = siz.Csiz;
|
|
var precinctsSizes = getPrecinctSizesInImageScale(tile);
|
|
var l = 0,
|
|
r = 0,
|
|
c = 0,
|
|
px = 0,
|
|
py = 0;
|
|
|
|
this.nextPacket = function JpxImage_nextPacket() {
|
|
for (; c < componentsCount; ++c) {
|
|
var component = tile.components[c];
|
|
var precinctsIterationSizes = precinctsSizes.components[c];
|
|
var decompositionLevelsCount = component.codingStyleParameters.decompositionLevelsCount;
|
|
|
|
for (; py < precinctsIterationSizes.maxNumHigh; py++) {
|
|
for (; px < precinctsIterationSizes.maxNumWide; px++) {
|
|
for (; r <= decompositionLevelsCount; r++) {
|
|
var resolution = component.resolutions[r];
|
|
var sizeInImageScale = precinctsIterationSizes.resolutions[r];
|
|
var k = getPrecinctIndexIfExist(px, py, sizeInImageScale, precinctsIterationSizes, resolution);
|
|
|
|
if (k === null) {
|
|
continue;
|
|
}
|
|
|
|
for (; l < layersCount;) {
|
|
var packet = createPacket(resolution, k, l);
|
|
l++;
|
|
return packet;
|
|
}
|
|
|
|
l = 0;
|
|
}
|
|
|
|
r = 0;
|
|
}
|
|
|
|
px = 0;
|
|
}
|
|
|
|
py = 0;
|
|
}
|
|
|
|
throw new JpxError("Out of packets");
|
|
};
|
|
}
|
|
|
|
function getPrecinctIndexIfExist(pxIndex, pyIndex, sizeInImageScale, precinctIterationSizes, resolution) {
|
|
var posX = pxIndex * precinctIterationSizes.minWidth;
|
|
var posY = pyIndex * precinctIterationSizes.minHeight;
|
|
|
|
if (posX % sizeInImageScale.width !== 0 || posY % sizeInImageScale.height !== 0) {
|
|
return null;
|
|
}
|
|
|
|
var startPrecinctRowIndex = posY / sizeInImageScale.width * resolution.precinctParameters.numprecinctswide;
|
|
return posX / sizeInImageScale.height + startPrecinctRowIndex;
|
|
}
|
|
|
|
function getPrecinctSizesInImageScale(tile) {
|
|
var componentsCount = tile.components.length;
|
|
var minWidth = Number.MAX_VALUE;
|
|
var minHeight = Number.MAX_VALUE;
|
|
var maxNumWide = 0;
|
|
var maxNumHigh = 0;
|
|
var sizePerComponent = new Array(componentsCount);
|
|
|
|
for (var c = 0; c < componentsCount; c++) {
|
|
var component = tile.components[c];
|
|
var decompositionLevelsCount = component.codingStyleParameters.decompositionLevelsCount;
|
|
var sizePerResolution = new Array(decompositionLevelsCount + 1);
|
|
var minWidthCurrentComponent = Number.MAX_VALUE;
|
|
var minHeightCurrentComponent = Number.MAX_VALUE;
|
|
var maxNumWideCurrentComponent = 0;
|
|
var maxNumHighCurrentComponent = 0;
|
|
var scale = 1;
|
|
|
|
for (var r = decompositionLevelsCount; r >= 0; --r) {
|
|
var resolution = component.resolutions[r];
|
|
var widthCurrentResolution = scale * resolution.precinctParameters.precinctWidth;
|
|
var heightCurrentResolution = scale * resolution.precinctParameters.precinctHeight;
|
|
minWidthCurrentComponent = Math.min(minWidthCurrentComponent, widthCurrentResolution);
|
|
minHeightCurrentComponent = Math.min(minHeightCurrentComponent, heightCurrentResolution);
|
|
maxNumWideCurrentComponent = Math.max(maxNumWideCurrentComponent, resolution.precinctParameters.numprecinctswide);
|
|
maxNumHighCurrentComponent = Math.max(maxNumHighCurrentComponent, resolution.precinctParameters.numprecinctshigh);
|
|
sizePerResolution[r] = {
|
|
width: widthCurrentResolution,
|
|
height: heightCurrentResolution
|
|
};
|
|
scale <<= 1;
|
|
}
|
|
|
|
minWidth = Math.min(minWidth, minWidthCurrentComponent);
|
|
minHeight = Math.min(minHeight, minHeightCurrentComponent);
|
|
maxNumWide = Math.max(maxNumWide, maxNumWideCurrentComponent);
|
|
maxNumHigh = Math.max(maxNumHigh, maxNumHighCurrentComponent);
|
|
sizePerComponent[c] = {
|
|
resolutions: sizePerResolution,
|
|
minWidth: minWidthCurrentComponent,
|
|
minHeight: minHeightCurrentComponent,
|
|
maxNumWide: maxNumWideCurrentComponent,
|
|
maxNumHigh: maxNumHighCurrentComponent
|
|
};
|
|
}
|
|
|
|
return {
|
|
components: sizePerComponent,
|
|
minWidth,
|
|
minHeight,
|
|
maxNumWide,
|
|
maxNumHigh
|
|
};
|
|
}
|
|
|
|
function buildPackets(context) {
|
|
var siz = context.SIZ;
|
|
var tileIndex = context.currentTile.index;
|
|
var tile = context.tiles[tileIndex];
|
|
var componentsCount = siz.Csiz;
|
|
|
|
for (var c = 0; c < componentsCount; c++) {
|
|
var component = tile.components[c];
|
|
var decompositionLevelsCount = component.codingStyleParameters.decompositionLevelsCount;
|
|
var resolutions = [];
|
|
var subbands = [];
|
|
|
|
for (var r = 0; r <= decompositionLevelsCount; r++) {
|
|
var blocksDimensions = getBlocksDimensions(context, component, r);
|
|
var resolution = {};
|
|
var scale = 1 << decompositionLevelsCount - r;
|
|
resolution.trx0 = Math.ceil(component.tcx0 / scale);
|
|
resolution.try0 = Math.ceil(component.tcy0 / scale);
|
|
resolution.trx1 = Math.ceil(component.tcx1 / scale);
|
|
resolution.try1 = Math.ceil(component.tcy1 / scale);
|
|
resolution.resLevel = r;
|
|
buildPrecincts(context, resolution, blocksDimensions);
|
|
resolutions.push(resolution);
|
|
var subband;
|
|
|
|
if (r === 0) {
|
|
subband = {};
|
|
subband.type = "LL";
|
|
subband.tbx0 = Math.ceil(component.tcx0 / scale);
|
|
subband.tby0 = Math.ceil(component.tcy0 / scale);
|
|
subband.tbx1 = Math.ceil(component.tcx1 / scale);
|
|
subband.tby1 = Math.ceil(component.tcy1 / scale);
|
|
subband.resolution = resolution;
|
|
buildCodeblocks(context, subband, blocksDimensions);
|
|
subbands.push(subband);
|
|
resolution.subbands = [subband];
|
|
} else {
|
|
var bscale = 1 << decompositionLevelsCount - r + 1;
|
|
var resolutionSubbands = [];
|
|
subband = {};
|
|
subband.type = "HL";
|
|
subband.tbx0 = Math.ceil(component.tcx0 / bscale - 0.5);
|
|
subband.tby0 = Math.ceil(component.tcy0 / bscale);
|
|
subband.tbx1 = Math.ceil(component.tcx1 / bscale - 0.5);
|
|
subband.tby1 = Math.ceil(component.tcy1 / bscale);
|
|
subband.resolution = resolution;
|
|
buildCodeblocks(context, subband, blocksDimensions);
|
|
subbands.push(subband);
|
|
resolutionSubbands.push(subband);
|
|
subband = {};
|
|
subband.type = "LH";
|
|
subband.tbx0 = Math.ceil(component.tcx0 / bscale);
|
|
subband.tby0 = Math.ceil(component.tcy0 / bscale - 0.5);
|
|
subband.tbx1 = Math.ceil(component.tcx1 / bscale);
|
|
subband.tby1 = Math.ceil(component.tcy1 / bscale - 0.5);
|
|
subband.resolution = resolution;
|
|
buildCodeblocks(context, subband, blocksDimensions);
|
|
subbands.push(subband);
|
|
resolutionSubbands.push(subband);
|
|
subband = {};
|
|
subband.type = "HH";
|
|
subband.tbx0 = Math.ceil(component.tcx0 / bscale - 0.5);
|
|
subband.tby0 = Math.ceil(component.tcy0 / bscale - 0.5);
|
|
subband.tbx1 = Math.ceil(component.tcx1 / bscale - 0.5);
|
|
subband.tby1 = Math.ceil(component.tcy1 / bscale - 0.5);
|
|
subband.resolution = resolution;
|
|
buildCodeblocks(context, subband, blocksDimensions);
|
|
subbands.push(subband);
|
|
resolutionSubbands.push(subband);
|
|
resolution.subbands = resolutionSubbands;
|
|
}
|
|
}
|
|
|
|
component.resolutions = resolutions;
|
|
component.subbands = subbands;
|
|
}
|
|
|
|
var progressionOrder = tile.codingStyleDefaultParameters.progressionOrder;
|
|
|
|
switch (progressionOrder) {
|
|
case 0:
|
|
tile.packetsIterator = new LayerResolutionComponentPositionIterator(context);
|
|
break;
|
|
|
|
case 1:
|
|
tile.packetsIterator = new ResolutionLayerComponentPositionIterator(context);
|
|
break;
|
|
|
|
case 2:
|
|
tile.packetsIterator = new ResolutionPositionComponentLayerIterator(context);
|
|
break;
|
|
|
|
case 3:
|
|
tile.packetsIterator = new PositionComponentResolutionLayerIterator(context);
|
|
break;
|
|
|
|
case 4:
|
|
tile.packetsIterator = new ComponentPositionResolutionLayerIterator(context);
|
|
break;
|
|
|
|
default:
|
|
throw new JpxError(`Unsupported progression order ${progressionOrder}`);
|
|
}
|
|
}
|
|
|
|
function parseTilePackets(context, data, offset, dataLength) {
|
|
var position = 0;
|
|
var buffer,
|
|
bufferSize = 0,
|
|
skipNextBit = false;
|
|
|
|
function readBits(count) {
|
|
while (bufferSize < count) {
|
|
var b = data[offset + position];
|
|
position++;
|
|
|
|
if (skipNextBit) {
|
|
buffer = buffer << 7 | b;
|
|
bufferSize += 7;
|
|
skipNextBit = false;
|
|
} else {
|
|
buffer = buffer << 8 | b;
|
|
bufferSize += 8;
|
|
}
|
|
|
|
if (b === 0xff) {
|
|
skipNextBit = true;
|
|
}
|
|
}
|
|
|
|
bufferSize -= count;
|
|
return buffer >>> bufferSize & (1 << count) - 1;
|
|
}
|
|
|
|
function skipMarkerIfEqual(value) {
|
|
if (data[offset + position - 1] === 0xff && data[offset + position] === value) {
|
|
skipBytes(1);
|
|
return true;
|
|
} else if (data[offset + position] === 0xff && data[offset + position + 1] === value) {
|
|
skipBytes(2);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
function skipBytes(count) {
|
|
position += count;
|
|
}
|
|
|
|
function alignToByte() {
|
|
bufferSize = 0;
|
|
|
|
if (skipNextBit) {
|
|
position++;
|
|
skipNextBit = false;
|
|
}
|
|
}
|
|
|
|
function readCodingpasses() {
|
|
if (readBits(1) === 0) {
|
|
return 1;
|
|
}
|
|
|
|
if (readBits(1) === 0) {
|
|
return 2;
|
|
}
|
|
|
|
var value = readBits(2);
|
|
|
|
if (value < 3) {
|
|
return value + 3;
|
|
}
|
|
|
|
value = readBits(5);
|
|
|
|
if (value < 31) {
|
|
return value + 6;
|
|
}
|
|
|
|
value = readBits(7);
|
|
return value + 37;
|
|
}
|
|
|
|
var tileIndex = context.currentTile.index;
|
|
var tile = context.tiles[tileIndex];
|
|
var sopMarkerUsed = context.COD.sopMarkerUsed;
|
|
var ephMarkerUsed = context.COD.ephMarkerUsed;
|
|
var packetsIterator = tile.packetsIterator;
|
|
|
|
while (position < dataLength) {
|
|
alignToByte();
|
|
|
|
if (sopMarkerUsed && skipMarkerIfEqual(0x91)) {
|
|
skipBytes(4);
|
|
}
|
|
|
|
var packet = packetsIterator.nextPacket();
|
|
|
|
if (!readBits(1)) {
|
|
continue;
|
|
}
|
|
|
|
var layerNumber = packet.layerNumber;
|
|
var queue = [],
|
|
codeblock;
|
|
|
|
for (var i = 0, ii = packet.codeblocks.length; i < ii; i++) {
|
|
codeblock = packet.codeblocks[i];
|
|
var precinct = codeblock.precinct;
|
|
var codeblockColumn = codeblock.cbx - precinct.cbxMin;
|
|
var codeblockRow = codeblock.cby - precinct.cbyMin;
|
|
var codeblockIncluded = false;
|
|
var firstTimeInclusion = false;
|
|
var valueReady;
|
|
|
|
if (codeblock.included !== undefined) {
|
|
codeblockIncluded = !!readBits(1);
|
|
} else {
|
|
precinct = codeblock.precinct;
|
|
var inclusionTree, zeroBitPlanesTree;
|
|
|
|
if (precinct.inclusionTree !== undefined) {
|
|
inclusionTree = precinct.inclusionTree;
|
|
} else {
|
|
var width = precinct.cbxMax - precinct.cbxMin + 1;
|
|
var height = precinct.cbyMax - precinct.cbyMin + 1;
|
|
inclusionTree = new InclusionTree(width, height, layerNumber);
|
|
zeroBitPlanesTree = new TagTree(width, height);
|
|
precinct.inclusionTree = inclusionTree;
|
|
precinct.zeroBitPlanesTree = zeroBitPlanesTree;
|
|
}
|
|
|
|
if (inclusionTree.reset(codeblockColumn, codeblockRow, layerNumber)) {
|
|
while (true) {
|
|
if (readBits(1)) {
|
|
valueReady = !inclusionTree.nextLevel();
|
|
|
|
if (valueReady) {
|
|
codeblock.included = true;
|
|
codeblockIncluded = firstTimeInclusion = true;
|
|
break;
|
|
}
|
|
} else {
|
|
inclusionTree.incrementValue(layerNumber);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!codeblockIncluded) {
|
|
continue;
|
|
}
|
|
|
|
if (firstTimeInclusion) {
|
|
zeroBitPlanesTree = precinct.zeroBitPlanesTree;
|
|
zeroBitPlanesTree.reset(codeblockColumn, codeblockRow);
|
|
|
|
while (true) {
|
|
if (readBits(1)) {
|
|
valueReady = !zeroBitPlanesTree.nextLevel();
|
|
|
|
if (valueReady) {
|
|
break;
|
|
}
|
|
} else {
|
|
zeroBitPlanesTree.incrementValue();
|
|
}
|
|
}
|
|
|
|
codeblock.zeroBitPlanes = zeroBitPlanesTree.value;
|
|
}
|
|
|
|
var codingpasses = readCodingpasses();
|
|
|
|
while (readBits(1)) {
|
|
codeblock.Lblock++;
|
|
}
|
|
|
|
var codingpassesLog2 = (0, _core_utils.log2)(codingpasses);
|
|
var bits = (codingpasses < 1 << codingpassesLog2 ? codingpassesLog2 - 1 : codingpassesLog2) + codeblock.Lblock;
|
|
var codedDataLength = readBits(bits);
|
|
queue.push({
|
|
codeblock,
|
|
codingpasses,
|
|
dataLength: codedDataLength
|
|
});
|
|
}
|
|
|
|
alignToByte();
|
|
|
|
if (ephMarkerUsed) {
|
|
skipMarkerIfEqual(0x92);
|
|
}
|
|
|
|
while (queue.length > 0) {
|
|
var packetItem = queue.shift();
|
|
codeblock = packetItem.codeblock;
|
|
|
|
if (codeblock.data === undefined) {
|
|
codeblock.data = [];
|
|
}
|
|
|
|
codeblock.data.push({
|
|
data,
|
|
start: offset + position,
|
|
end: offset + position + packetItem.dataLength,
|
|
codingpasses: packetItem.codingpasses
|
|
});
|
|
position += packetItem.dataLength;
|
|
}
|
|
}
|
|
|
|
return position;
|
|
}
|
|
|
|
function copyCoefficients(coefficients, levelWidth, levelHeight, subband, delta, mb, reversible, segmentationSymbolUsed) {
|
|
var x0 = subband.tbx0;
|
|
var y0 = subband.tby0;
|
|
var width = subband.tbx1 - subband.tbx0;
|
|
var codeblocks = subband.codeblocks;
|
|
var right = subband.type.charAt(0) === "H" ? 1 : 0;
|
|
var bottom = subband.type.charAt(1) === "H" ? levelWidth : 0;
|
|
|
|
for (var i = 0, ii = codeblocks.length; i < ii; ++i) {
|
|
var codeblock = codeblocks[i];
|
|
var blockWidth = codeblock.tbx1_ - codeblock.tbx0_;
|
|
var blockHeight = codeblock.tby1_ - codeblock.tby0_;
|
|
|
|
if (blockWidth === 0 || blockHeight === 0) {
|
|
continue;
|
|
}
|
|
|
|
if (codeblock.data === undefined) {
|
|
continue;
|
|
}
|
|
|
|
var bitModel, currentCodingpassType;
|
|
bitModel = new BitModel(blockWidth, blockHeight, codeblock.subbandType, codeblock.zeroBitPlanes, mb);
|
|
currentCodingpassType = 2;
|
|
var data = codeblock.data,
|
|
totalLength = 0,
|
|
codingpasses = 0;
|
|
var j, jj, dataItem;
|
|
|
|
for (j = 0, jj = data.length; j < jj; j++) {
|
|
dataItem = data[j];
|
|
totalLength += dataItem.end - dataItem.start;
|
|
codingpasses += dataItem.codingpasses;
|
|
}
|
|
|
|
var encodedData = new Uint8Array(totalLength);
|
|
var position = 0;
|
|
|
|
for (j = 0, jj = data.length; j < jj; j++) {
|
|
dataItem = data[j];
|
|
var chunk = dataItem.data.subarray(dataItem.start, dataItem.end);
|
|
encodedData.set(chunk, position);
|
|
position += chunk.length;
|
|
}
|
|
|
|
var decoder = new _arithmetic_decoder.ArithmeticDecoder(encodedData, 0, totalLength);
|
|
bitModel.setDecoder(decoder);
|
|
|
|
for (j = 0; j < codingpasses; j++) {
|
|
switch (currentCodingpassType) {
|
|
case 0:
|
|
bitModel.runSignificancePropagationPass();
|
|
break;
|
|
|
|
case 1:
|
|
bitModel.runMagnitudeRefinementPass();
|
|
break;
|
|
|
|
case 2:
|
|
bitModel.runCleanupPass();
|
|
|
|
if (segmentationSymbolUsed) {
|
|
bitModel.checkSegmentationSymbol();
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
currentCodingpassType = (currentCodingpassType + 1) % 3;
|
|
}
|
|
|
|
var offset = codeblock.tbx0_ - x0 + (codeblock.tby0_ - y0) * width;
|
|
var sign = bitModel.coefficentsSign;
|
|
var magnitude = bitModel.coefficentsMagnitude;
|
|
var bitsDecoded = bitModel.bitsDecoded;
|
|
var magnitudeCorrection = reversible ? 0 : 0.5;
|
|
var k, n, nb;
|
|
position = 0;
|
|
var interleave = subband.type !== "LL";
|
|
|
|
for (j = 0; j < blockHeight; j++) {
|
|
var row = offset / width | 0;
|
|
var levelOffset = 2 * row * (levelWidth - width) + right + bottom;
|
|
|
|
for (k = 0; k < blockWidth; k++) {
|
|
n = magnitude[position];
|
|
|
|
if (n !== 0) {
|
|
n = (n + magnitudeCorrection) * delta;
|
|
|
|
if (sign[position] !== 0) {
|
|
n = -n;
|
|
}
|
|
|
|
nb = bitsDecoded[position];
|
|
var pos = interleave ? levelOffset + (offset << 1) : offset;
|
|
|
|
if (reversible && nb >= mb) {
|
|
coefficients[pos] = n;
|
|
} else {
|
|
coefficients[pos] = n * (1 << mb - nb);
|
|
}
|
|
}
|
|
|
|
offset++;
|
|
position++;
|
|
}
|
|
|
|
offset += width - blockWidth;
|
|
}
|
|
}
|
|
}
|
|
|
|
function transformTile(context, tile, c) {
|
|
var component = tile.components[c];
|
|
var codingStyleParameters = component.codingStyleParameters;
|
|
var quantizationParameters = component.quantizationParameters;
|
|
var decompositionLevelsCount = codingStyleParameters.decompositionLevelsCount;
|
|
var spqcds = quantizationParameters.SPqcds;
|
|
var scalarExpounded = quantizationParameters.scalarExpounded;
|
|
var guardBits = quantizationParameters.guardBits;
|
|
var segmentationSymbolUsed = codingStyleParameters.segmentationSymbolUsed;
|
|
var precision = context.components[c].precision;
|
|
var reversible = codingStyleParameters.reversibleTransformation;
|
|
var transform = reversible ? new ReversibleTransform() : new IrreversibleTransform();
|
|
var subbandCoefficients = [];
|
|
var b = 0;
|
|
|
|
for (var i = 0; i <= decompositionLevelsCount; i++) {
|
|
var resolution = component.resolutions[i];
|
|
var width = resolution.trx1 - resolution.trx0;
|
|
var height = resolution.try1 - resolution.try0;
|
|
var coefficients = new Float32Array(width * height);
|
|
|
|
for (var j = 0, jj = resolution.subbands.length; j < jj; j++) {
|
|
var mu, epsilon;
|
|
|
|
if (!scalarExpounded) {
|
|
mu = spqcds[0].mu;
|
|
epsilon = spqcds[0].epsilon + (i > 0 ? 1 - i : 0);
|
|
} else {
|
|
mu = spqcds[b].mu;
|
|
epsilon = spqcds[b].epsilon;
|
|
b++;
|
|
}
|
|
|
|
var subband = resolution.subbands[j];
|
|
var gainLog2 = SubbandsGainLog2[subband.type];
|
|
var delta = reversible ? 1 : 2 ** (precision + gainLog2 - epsilon) * (1 + mu / 2048);
|
|
var mb = guardBits + epsilon - 1;
|
|
copyCoefficients(coefficients, width, height, subband, delta, mb, reversible, segmentationSymbolUsed);
|
|
}
|
|
|
|
subbandCoefficients.push({
|
|
width,
|
|
height,
|
|
items: coefficients
|
|
});
|
|
}
|
|
|
|
var result = transform.calculate(subbandCoefficients, component.tcx0, component.tcy0);
|
|
return {
|
|
left: component.tcx0,
|
|
top: component.tcy0,
|
|
width: result.width,
|
|
height: result.height,
|
|
items: result.items
|
|
};
|
|
}
|
|
|
|
function transformComponents(context) {
|
|
var siz = context.SIZ;
|
|
var components = context.components;
|
|
var componentsCount = siz.Csiz;
|
|
var resultImages = [];
|
|
|
|
for (var i = 0, ii = context.tiles.length; i < ii; i++) {
|
|
var tile = context.tiles[i];
|
|
var transformedTiles = [];
|
|
var c;
|
|
|
|
for (c = 0; c < componentsCount; c++) {
|
|
transformedTiles[c] = transformTile(context, tile, c);
|
|
}
|
|
|
|
var tile0 = transformedTiles[0];
|
|
var out = new Uint8ClampedArray(tile0.items.length * componentsCount);
|
|
var result = {
|
|
left: tile0.left,
|
|
top: tile0.top,
|
|
width: tile0.width,
|
|
height: tile0.height,
|
|
items: out
|
|
};
|
|
var shift, offset;
|
|
var pos = 0,
|
|
j,
|
|
jj,
|
|
y0,
|
|
y1,
|
|
y2;
|
|
|
|
if (tile.codingStyleDefaultParameters.multipleComponentTransform) {
|
|
var fourComponents = componentsCount === 4;
|
|
var y0items = transformedTiles[0].items;
|
|
var y1items = transformedTiles[1].items;
|
|
var y2items = transformedTiles[2].items;
|
|
var y3items = fourComponents ? transformedTiles[3].items : null;
|
|
shift = components[0].precision - 8;
|
|
offset = (128 << shift) + 0.5;
|
|
var component0 = tile.components[0];
|
|
var alpha01 = componentsCount - 3;
|
|
jj = y0items.length;
|
|
|
|
if (!component0.codingStyleParameters.reversibleTransformation) {
|
|
for (j = 0; j < jj; j++, pos += alpha01) {
|
|
y0 = y0items[j] + offset;
|
|
y1 = y1items[j];
|
|
y2 = y2items[j];
|
|
out[pos++] = y0 + 1.402 * y2 >> shift;
|
|
out[pos++] = y0 - 0.34413 * y1 - 0.71414 * y2 >> shift;
|
|
out[pos++] = y0 + 1.772 * y1 >> shift;
|
|
}
|
|
} else {
|
|
for (j = 0; j < jj; j++, pos += alpha01) {
|
|
y0 = y0items[j] + offset;
|
|
y1 = y1items[j];
|
|
y2 = y2items[j];
|
|
const g = y0 - (y2 + y1 >> 2);
|
|
out[pos++] = g + y2 >> shift;
|
|
out[pos++] = g >> shift;
|
|
out[pos++] = g + y1 >> shift;
|
|
}
|
|
}
|
|
|
|
if (fourComponents) {
|
|
for (j = 0, pos = 3; j < jj; j++, pos += 4) {
|
|
out[pos] = y3items[j] + offset >> shift;
|
|
}
|
|
}
|
|
} else {
|
|
for (c = 0; c < componentsCount; c++) {
|
|
var items = transformedTiles[c].items;
|
|
shift = components[c].precision - 8;
|
|
offset = (128 << shift) + 0.5;
|
|
|
|
for (pos = c, j = 0, jj = items.length; j < jj; j++) {
|
|
out[pos] = items[j] + offset >> shift;
|
|
pos += componentsCount;
|
|
}
|
|
}
|
|
}
|
|
|
|
resultImages.push(result);
|
|
}
|
|
|
|
return resultImages;
|
|
}
|
|
|
|
function initializeTile(context, tileIndex) {
|
|
var siz = context.SIZ;
|
|
var componentsCount = siz.Csiz;
|
|
var tile = context.tiles[tileIndex];
|
|
|
|
for (var c = 0; c < componentsCount; c++) {
|
|
var component = tile.components[c];
|
|
var qcdOrQcc = context.currentTile.QCC[c] !== undefined ? context.currentTile.QCC[c] : context.currentTile.QCD;
|
|
component.quantizationParameters = qcdOrQcc;
|
|
var codOrCoc = context.currentTile.COC[c] !== undefined ? context.currentTile.COC[c] : context.currentTile.COD;
|
|
component.codingStyleParameters = codOrCoc;
|
|
}
|
|
|
|
tile.codingStyleDefaultParameters = context.currentTile.COD;
|
|
}
|
|
|
|
var TagTree = function TagTreeClosure() {
|
|
function TagTree(width, height) {
|
|
var levelsLength = (0, _core_utils.log2)(Math.max(width, height)) + 1;
|
|
this.levels = [];
|
|
|
|
for (var i = 0; i < levelsLength; i++) {
|
|
var level = {
|
|
width,
|
|
height,
|
|
items: []
|
|
};
|
|
this.levels.push(level);
|
|
width = Math.ceil(width / 2);
|
|
height = Math.ceil(height / 2);
|
|
}
|
|
}
|
|
|
|
TagTree.prototype = {
|
|
reset: function TagTree_reset(i, j) {
|
|
var currentLevel = 0,
|
|
value = 0,
|
|
level;
|
|
|
|
while (currentLevel < this.levels.length) {
|
|
level = this.levels[currentLevel];
|
|
var index = i + j * level.width;
|
|
|
|
if (level.items[index] !== undefined) {
|
|
value = level.items[index];
|
|
break;
|
|
}
|
|
|
|
level.index = index;
|
|
i >>= 1;
|
|
j >>= 1;
|
|
currentLevel++;
|
|
}
|
|
|
|
currentLevel--;
|
|
level = this.levels[currentLevel];
|
|
level.items[level.index] = value;
|
|
this.currentLevel = currentLevel;
|
|
delete this.value;
|
|
},
|
|
incrementValue: function TagTree_incrementValue() {
|
|
var level = this.levels[this.currentLevel];
|
|
level.items[level.index]++;
|
|
},
|
|
nextLevel: function TagTree_nextLevel() {
|
|
var currentLevel = this.currentLevel;
|
|
var level = this.levels[currentLevel];
|
|
var value = level.items[level.index];
|
|
currentLevel--;
|
|
|
|
if (currentLevel < 0) {
|
|
this.value = value;
|
|
return false;
|
|
}
|
|
|
|
this.currentLevel = currentLevel;
|
|
level = this.levels[currentLevel];
|
|
level.items[level.index] = value;
|
|
return true;
|
|
}
|
|
};
|
|
return TagTree;
|
|
}();
|
|
|
|
var InclusionTree = function InclusionTreeClosure() {
|
|
function InclusionTree(width, height, defaultValue) {
|
|
var levelsLength = (0, _core_utils.log2)(Math.max(width, height)) + 1;
|
|
this.levels = [];
|
|
|
|
for (var i = 0; i < levelsLength; i++) {
|
|
var items = new Uint8Array(width * height);
|
|
|
|
for (var j = 0, jj = items.length; j < jj; j++) {
|
|
items[j] = defaultValue;
|
|
}
|
|
|
|
var level = {
|
|
width,
|
|
height,
|
|
items
|
|
};
|
|
this.levels.push(level);
|
|
width = Math.ceil(width / 2);
|
|
height = Math.ceil(height / 2);
|
|
}
|
|
}
|
|
|
|
InclusionTree.prototype = {
|
|
reset: function InclusionTree_reset(i, j, stopValue) {
|
|
var currentLevel = 0;
|
|
|
|
while (currentLevel < this.levels.length) {
|
|
var level = this.levels[currentLevel];
|
|
var index = i + j * level.width;
|
|
level.index = index;
|
|
var value = level.items[index];
|
|
|
|
if (value === 0xff) {
|
|
break;
|
|
}
|
|
|
|
if (value > stopValue) {
|
|
this.currentLevel = currentLevel;
|
|
this.propagateValues();
|
|
return false;
|
|
}
|
|
|
|
i >>= 1;
|
|
j >>= 1;
|
|
currentLevel++;
|
|
}
|
|
|
|
this.currentLevel = currentLevel - 1;
|
|
return true;
|
|
},
|
|
incrementValue: function InclusionTree_incrementValue(stopValue) {
|
|
var level = this.levels[this.currentLevel];
|
|
level.items[level.index] = stopValue + 1;
|
|
this.propagateValues();
|
|
},
|
|
propagateValues: function InclusionTree_propagateValues() {
|
|
var levelIndex = this.currentLevel;
|
|
var level = this.levels[levelIndex];
|
|
var currentValue = level.items[level.index];
|
|
|
|
while (--levelIndex >= 0) {
|
|
level = this.levels[levelIndex];
|
|
level.items[level.index] = currentValue;
|
|
}
|
|
},
|
|
nextLevel: function InclusionTree_nextLevel() {
|
|
var currentLevel = this.currentLevel;
|
|
var level = this.levels[currentLevel];
|
|
var value = level.items[level.index];
|
|
level.items[level.index] = 0xff;
|
|
currentLevel--;
|
|
|
|
if (currentLevel < 0) {
|
|
return false;
|
|
}
|
|
|
|
this.currentLevel = currentLevel;
|
|
level = this.levels[currentLevel];
|
|
level.items[level.index] = value;
|
|
return true;
|
|
}
|
|
};
|
|
return InclusionTree;
|
|
}();
|
|
|
|
var BitModel = function BitModelClosure() {
|
|
var UNIFORM_CONTEXT = 17;
|
|
var RUNLENGTH_CONTEXT = 18;
|
|
var LLAndLHContextsLabel = new Uint8Array([0, 5, 8, 0, 3, 7, 8, 0, 4, 7, 8, 0, 0, 0, 0, 0, 1, 6, 8, 0, 3, 7, 8, 0, 4, 7, 8, 0, 0, 0, 0, 0, 2, 6, 8, 0, 3, 7, 8, 0, 4, 7, 8, 0, 0, 0, 0, 0, 2, 6, 8, 0, 3, 7, 8, 0, 4, 7, 8, 0, 0, 0, 0, 0, 2, 6, 8, 0, 3, 7, 8, 0, 4, 7, 8]);
|
|
var HLContextLabel = new Uint8Array([0, 3, 4, 0, 5, 7, 7, 0, 8, 8, 8, 0, 0, 0, 0, 0, 1, 3, 4, 0, 6, 7, 7, 0, 8, 8, 8, 0, 0, 0, 0, 0, 2, 3, 4, 0, 6, 7, 7, 0, 8, 8, 8, 0, 0, 0, 0, 0, 2, 3, 4, 0, 6, 7, 7, 0, 8, 8, 8, 0, 0, 0, 0, 0, 2, 3, 4, 0, 6, 7, 7, 0, 8, 8, 8]);
|
|
var HHContextLabel = new Uint8Array([0, 1, 2, 0, 1, 2, 2, 0, 2, 2, 2, 0, 0, 0, 0, 0, 3, 4, 5, 0, 4, 5, 5, 0, 5, 5, 5, 0, 0, 0, 0, 0, 6, 7, 7, 0, 7, 7, 7, 0, 7, 7, 7, 0, 0, 0, 0, 0, 8, 8, 8, 0, 8, 8, 8, 0, 8, 8, 8, 0, 0, 0, 0, 0, 8, 8, 8, 0, 8, 8, 8, 0, 8, 8, 8]);
|
|
|
|
function BitModel(width, height, subband, zeroBitPlanes, mb) {
|
|
this.width = width;
|
|
this.height = height;
|
|
let contextLabelTable;
|
|
|
|
if (subband === "HH") {
|
|
contextLabelTable = HHContextLabel;
|
|
} else if (subband === "HL") {
|
|
contextLabelTable = HLContextLabel;
|
|
} else {
|
|
contextLabelTable = LLAndLHContextsLabel;
|
|
}
|
|
|
|
this.contextLabelTable = contextLabelTable;
|
|
var coefficientCount = width * height;
|
|
this.neighborsSignificance = new Uint8Array(coefficientCount);
|
|
this.coefficentsSign = new Uint8Array(coefficientCount);
|
|
let coefficentsMagnitude;
|
|
|
|
if (mb > 14) {
|
|
coefficentsMagnitude = new Uint32Array(coefficientCount);
|
|
} else if (mb > 6) {
|
|
coefficentsMagnitude = new Uint16Array(coefficientCount);
|
|
} else {
|
|
coefficentsMagnitude = new Uint8Array(coefficientCount);
|
|
}
|
|
|
|
this.coefficentsMagnitude = coefficentsMagnitude;
|
|
this.processingFlags = new Uint8Array(coefficientCount);
|
|
var bitsDecoded = new Uint8Array(coefficientCount);
|
|
|
|
if (zeroBitPlanes !== 0) {
|
|
for (var i = 0; i < coefficientCount; i++) {
|
|
bitsDecoded[i] = zeroBitPlanes;
|
|
}
|
|
}
|
|
|
|
this.bitsDecoded = bitsDecoded;
|
|
this.reset();
|
|
}
|
|
|
|
BitModel.prototype = {
|
|
setDecoder: function BitModel_setDecoder(decoder) {
|
|
this.decoder = decoder;
|
|
},
|
|
reset: function BitModel_reset() {
|
|
this.contexts = new Int8Array(19);
|
|
this.contexts[0] = 4 << 1 | 0;
|
|
this.contexts[UNIFORM_CONTEXT] = 46 << 1 | 0;
|
|
this.contexts[RUNLENGTH_CONTEXT] = 3 << 1 | 0;
|
|
},
|
|
setNeighborsSignificance: function BitModel_setNeighborsSignificance(row, column, index) {
|
|
var neighborsSignificance = this.neighborsSignificance;
|
|
var width = this.width,
|
|
height = this.height;
|
|
var left = column > 0;
|
|
var right = column + 1 < width;
|
|
var i;
|
|
|
|
if (row > 0) {
|
|
i = index - width;
|
|
|
|
if (left) {
|
|
neighborsSignificance[i - 1] += 0x10;
|
|
}
|
|
|
|
if (right) {
|
|
neighborsSignificance[i + 1] += 0x10;
|
|
}
|
|
|
|
neighborsSignificance[i] += 0x04;
|
|
}
|
|
|
|
if (row + 1 < height) {
|
|
i = index + width;
|
|
|
|
if (left) {
|
|
neighborsSignificance[i - 1] += 0x10;
|
|
}
|
|
|
|
if (right) {
|
|
neighborsSignificance[i + 1] += 0x10;
|
|
}
|
|
|
|
neighborsSignificance[i] += 0x04;
|
|
}
|
|
|
|
if (left) {
|
|
neighborsSignificance[index - 1] += 0x01;
|
|
}
|
|
|
|
if (right) {
|
|
neighborsSignificance[index + 1] += 0x01;
|
|
}
|
|
|
|
neighborsSignificance[index] |= 0x80;
|
|
},
|
|
runSignificancePropagationPass: function BitModel_runSignificancePropagationPass() {
|
|
var decoder = this.decoder;
|
|
var width = this.width,
|
|
height = this.height;
|
|
var coefficentsMagnitude = this.coefficentsMagnitude;
|
|
var coefficentsSign = this.coefficentsSign;
|
|
var neighborsSignificance = this.neighborsSignificance;
|
|
var processingFlags = this.processingFlags;
|
|
var contexts = this.contexts;
|
|
var labels = this.contextLabelTable;
|
|
var bitsDecoded = this.bitsDecoded;
|
|
var processedInverseMask = ~1;
|
|
var processedMask = 1;
|
|
var firstMagnitudeBitMask = 2;
|
|
|
|
for (var i0 = 0; i0 < height; i0 += 4) {
|
|
for (var j = 0; j < width; j++) {
|
|
var index = i0 * width + j;
|
|
|
|
for (var i1 = 0; i1 < 4; i1++, index += width) {
|
|
var i = i0 + i1;
|
|
|
|
if (i >= height) {
|
|
break;
|
|
}
|
|
|
|
processingFlags[index] &= processedInverseMask;
|
|
|
|
if (coefficentsMagnitude[index] || !neighborsSignificance[index]) {
|
|
continue;
|
|
}
|
|
|
|
var contextLabel = labels[neighborsSignificance[index]];
|
|
var decision = decoder.readBit(contexts, contextLabel);
|
|
|
|
if (decision) {
|
|
var sign = this.decodeSignBit(i, j, index);
|
|
coefficentsSign[index] = sign;
|
|
coefficentsMagnitude[index] = 1;
|
|
this.setNeighborsSignificance(i, j, index);
|
|
processingFlags[index] |= firstMagnitudeBitMask;
|
|
}
|
|
|
|
bitsDecoded[index]++;
|
|
processingFlags[index] |= processedMask;
|
|
}
|
|
}
|
|
}
|
|
},
|
|
decodeSignBit: function BitModel_decodeSignBit(row, column, index) {
|
|
var width = this.width,
|
|
height = this.height;
|
|
var coefficentsMagnitude = this.coefficentsMagnitude;
|
|
var coefficentsSign = this.coefficentsSign;
|
|
var contribution, sign0, sign1, significance1;
|
|
var contextLabel, decoded;
|
|
significance1 = column > 0 && coefficentsMagnitude[index - 1] !== 0;
|
|
|
|
if (column + 1 < width && coefficentsMagnitude[index + 1] !== 0) {
|
|
sign1 = coefficentsSign[index + 1];
|
|
|
|
if (significance1) {
|
|
sign0 = coefficentsSign[index - 1];
|
|
contribution = 1 - sign1 - sign0;
|
|
} else {
|
|
contribution = 1 - sign1 - sign1;
|
|
}
|
|
} else if (significance1) {
|
|
sign0 = coefficentsSign[index - 1];
|
|
contribution = 1 - sign0 - sign0;
|
|
} else {
|
|
contribution = 0;
|
|
}
|
|
|
|
var horizontalContribution = 3 * contribution;
|
|
significance1 = row > 0 && coefficentsMagnitude[index - width] !== 0;
|
|
|
|
if (row + 1 < height && coefficentsMagnitude[index + width] !== 0) {
|
|
sign1 = coefficentsSign[index + width];
|
|
|
|
if (significance1) {
|
|
sign0 = coefficentsSign[index - width];
|
|
contribution = 1 - sign1 - sign0 + horizontalContribution;
|
|
} else {
|
|
contribution = 1 - sign1 - sign1 + horizontalContribution;
|
|
}
|
|
} else if (significance1) {
|
|
sign0 = coefficentsSign[index - width];
|
|
contribution = 1 - sign0 - sign0 + horizontalContribution;
|
|
} else {
|
|
contribution = horizontalContribution;
|
|
}
|
|
|
|
if (contribution >= 0) {
|
|
contextLabel = 9 + contribution;
|
|
decoded = this.decoder.readBit(this.contexts, contextLabel);
|
|
} else {
|
|
contextLabel = 9 - contribution;
|
|
decoded = this.decoder.readBit(this.contexts, contextLabel) ^ 1;
|
|
}
|
|
|
|
return decoded;
|
|
},
|
|
runMagnitudeRefinementPass: function BitModel_runMagnitudeRefinementPass() {
|
|
var decoder = this.decoder;
|
|
var width = this.width,
|
|
height = this.height;
|
|
var coefficentsMagnitude = this.coefficentsMagnitude;
|
|
var neighborsSignificance = this.neighborsSignificance;
|
|
var contexts = this.contexts;
|
|
var bitsDecoded = this.bitsDecoded;
|
|
var processingFlags = this.processingFlags;
|
|
var processedMask = 1;
|
|
var firstMagnitudeBitMask = 2;
|
|
var length = width * height;
|
|
var width4 = width * 4;
|
|
|
|
for (var index0 = 0, indexNext; index0 < length; index0 = indexNext) {
|
|
indexNext = Math.min(length, index0 + width4);
|
|
|
|
for (var j = 0; j < width; j++) {
|
|
for (var index = index0 + j; index < indexNext; index += width) {
|
|
if (!coefficentsMagnitude[index] || (processingFlags[index] & processedMask) !== 0) {
|
|
continue;
|
|
}
|
|
|
|
var contextLabel = 16;
|
|
|
|
if ((processingFlags[index] & firstMagnitudeBitMask) !== 0) {
|
|
processingFlags[index] ^= firstMagnitudeBitMask;
|
|
var significance = neighborsSignificance[index] & 127;
|
|
contextLabel = significance === 0 ? 15 : 14;
|
|
}
|
|
|
|
var bit = decoder.readBit(contexts, contextLabel);
|
|
coefficentsMagnitude[index] = coefficentsMagnitude[index] << 1 | bit;
|
|
bitsDecoded[index]++;
|
|
processingFlags[index] |= processedMask;
|
|
}
|
|
}
|
|
}
|
|
},
|
|
runCleanupPass: function BitModel_runCleanupPass() {
|
|
var decoder = this.decoder;
|
|
var width = this.width,
|
|
height = this.height;
|
|
var neighborsSignificance = this.neighborsSignificance;
|
|
var coefficentsMagnitude = this.coefficentsMagnitude;
|
|
var coefficentsSign = this.coefficentsSign;
|
|
var contexts = this.contexts;
|
|
var labels = this.contextLabelTable;
|
|
var bitsDecoded = this.bitsDecoded;
|
|
var processingFlags = this.processingFlags;
|
|
var processedMask = 1;
|
|
var firstMagnitudeBitMask = 2;
|
|
var oneRowDown = width;
|
|
var twoRowsDown = width * 2;
|
|
var threeRowsDown = width * 3;
|
|
var iNext;
|
|
|
|
for (var i0 = 0; i0 < height; i0 = iNext) {
|
|
iNext = Math.min(i0 + 4, height);
|
|
var indexBase = i0 * width;
|
|
var checkAllEmpty = i0 + 3 < height;
|
|
|
|
for (var j = 0; j < width; j++) {
|
|
var index0 = indexBase + j;
|
|
var allEmpty = checkAllEmpty && processingFlags[index0] === 0 && processingFlags[index0 + oneRowDown] === 0 && processingFlags[index0 + twoRowsDown] === 0 && processingFlags[index0 + threeRowsDown] === 0 && neighborsSignificance[index0] === 0 && neighborsSignificance[index0 + oneRowDown] === 0 && neighborsSignificance[index0 + twoRowsDown] === 0 && neighborsSignificance[index0 + threeRowsDown] === 0;
|
|
var i1 = 0,
|
|
index = index0;
|
|
var i = i0,
|
|
sign;
|
|
|
|
if (allEmpty) {
|
|
var hasSignificantCoefficent = decoder.readBit(contexts, RUNLENGTH_CONTEXT);
|
|
|
|
if (!hasSignificantCoefficent) {
|
|
bitsDecoded[index0]++;
|
|
bitsDecoded[index0 + oneRowDown]++;
|
|
bitsDecoded[index0 + twoRowsDown]++;
|
|
bitsDecoded[index0 + threeRowsDown]++;
|
|
continue;
|
|
}
|
|
|
|
i1 = decoder.readBit(contexts, UNIFORM_CONTEXT) << 1 | decoder.readBit(contexts, UNIFORM_CONTEXT);
|
|
|
|
if (i1 !== 0) {
|
|
i = i0 + i1;
|
|
index += i1 * width;
|
|
}
|
|
|
|
sign = this.decodeSignBit(i, j, index);
|
|
coefficentsSign[index] = sign;
|
|
coefficentsMagnitude[index] = 1;
|
|
this.setNeighborsSignificance(i, j, index);
|
|
processingFlags[index] |= firstMagnitudeBitMask;
|
|
index = index0;
|
|
|
|
for (var i2 = i0; i2 <= i; i2++, index += width) {
|
|
bitsDecoded[index]++;
|
|
}
|
|
|
|
i1++;
|
|
}
|
|
|
|
for (i = i0 + i1; i < iNext; i++, index += width) {
|
|
if (coefficentsMagnitude[index] || (processingFlags[index] & processedMask) !== 0) {
|
|
continue;
|
|
}
|
|
|
|
var contextLabel = labels[neighborsSignificance[index]];
|
|
var decision = decoder.readBit(contexts, contextLabel);
|
|
|
|
if (decision === 1) {
|
|
sign = this.decodeSignBit(i, j, index);
|
|
coefficentsSign[index] = sign;
|
|
coefficentsMagnitude[index] = 1;
|
|
this.setNeighborsSignificance(i, j, index);
|
|
processingFlags[index] |= firstMagnitudeBitMask;
|
|
}
|
|
|
|
bitsDecoded[index]++;
|
|
}
|
|
}
|
|
}
|
|
},
|
|
checkSegmentationSymbol: function BitModel_checkSegmentationSymbol() {
|
|
var decoder = this.decoder;
|
|
var contexts = this.contexts;
|
|
var symbol = decoder.readBit(contexts, UNIFORM_CONTEXT) << 3 | decoder.readBit(contexts, UNIFORM_CONTEXT) << 2 | decoder.readBit(contexts, UNIFORM_CONTEXT) << 1 | decoder.readBit(contexts, UNIFORM_CONTEXT);
|
|
|
|
if (symbol !== 0xa) {
|
|
throw new JpxError("Invalid segmentation symbol");
|
|
}
|
|
}
|
|
};
|
|
return BitModel;
|
|
}();
|
|
|
|
var Transform = function TransformClosure() {
|
|
function Transform() {}
|
|
|
|
Transform.prototype.calculate = function transformCalculate(subbands, u0, v0) {
|
|
var ll = subbands[0];
|
|
|
|
for (var i = 1, ii = subbands.length; i < ii; i++) {
|
|
ll = this.iterate(ll, subbands[i], u0, v0);
|
|
}
|
|
|
|
return ll;
|
|
};
|
|
|
|
Transform.prototype.extend = function extend(buffer, offset, size) {
|
|
var i1 = offset - 1,
|
|
j1 = offset + 1;
|
|
var i2 = offset + size - 2,
|
|
j2 = offset + size;
|
|
buffer[i1--] = buffer[j1++];
|
|
buffer[j2++] = buffer[i2--];
|
|
buffer[i1--] = buffer[j1++];
|
|
buffer[j2++] = buffer[i2--];
|
|
buffer[i1--] = buffer[j1++];
|
|
buffer[j2++] = buffer[i2--];
|
|
buffer[i1] = buffer[j1];
|
|
buffer[j2] = buffer[i2];
|
|
};
|
|
|
|
Transform.prototype.iterate = function Transform_iterate(ll, hl_lh_hh, u0, v0) {
|
|
var llWidth = ll.width,
|
|
llHeight = ll.height,
|
|
llItems = ll.items;
|
|
var width = hl_lh_hh.width;
|
|
var height = hl_lh_hh.height;
|
|
var items = hl_lh_hh.items;
|
|
var i, j, k, l, u, v;
|
|
|
|
for (k = 0, i = 0; i < llHeight; i++) {
|
|
l = i * 2 * width;
|
|
|
|
for (j = 0; j < llWidth; j++, k++, l += 2) {
|
|
items[l] = llItems[k];
|
|
}
|
|
}
|
|
|
|
llItems = ll.items = null;
|
|
var bufferPadding = 4;
|
|
var rowBuffer = new Float32Array(width + 2 * bufferPadding);
|
|
|
|
if (width === 1) {
|
|
if ((u0 & 1) !== 0) {
|
|
for (v = 0, k = 0; v < height; v++, k += width) {
|
|
items[k] *= 0.5;
|
|
}
|
|
}
|
|
} else {
|
|
for (v = 0, k = 0; v < height; v++, k += width) {
|
|
rowBuffer.set(items.subarray(k, k + width), bufferPadding);
|
|
this.extend(rowBuffer, bufferPadding, width);
|
|
this.filter(rowBuffer, bufferPadding, width);
|
|
items.set(rowBuffer.subarray(bufferPadding, bufferPadding + width), k);
|
|
}
|
|
}
|
|
|
|
var numBuffers = 16;
|
|
var colBuffers = [];
|
|
|
|
for (i = 0; i < numBuffers; i++) {
|
|
colBuffers.push(new Float32Array(height + 2 * bufferPadding));
|
|
}
|
|
|
|
var b,
|
|
currentBuffer = 0;
|
|
ll = bufferPadding + height;
|
|
|
|
if (height === 1) {
|
|
if ((v0 & 1) !== 0) {
|
|
for (u = 0; u < width; u++) {
|
|
items[u] *= 0.5;
|
|
}
|
|
}
|
|
} else {
|
|
for (u = 0; u < width; u++) {
|
|
if (currentBuffer === 0) {
|
|
numBuffers = Math.min(width - u, numBuffers);
|
|
|
|
for (k = u, l = bufferPadding; l < ll; k += width, l++) {
|
|
for (b = 0; b < numBuffers; b++) {
|
|
colBuffers[b][l] = items[k + b];
|
|
}
|
|
}
|
|
|
|
currentBuffer = numBuffers;
|
|
}
|
|
|
|
currentBuffer--;
|
|
var buffer = colBuffers[currentBuffer];
|
|
this.extend(buffer, bufferPadding, height);
|
|
this.filter(buffer, bufferPadding, height);
|
|
|
|
if (currentBuffer === 0) {
|
|
k = u - numBuffers + 1;
|
|
|
|
for (l = bufferPadding; l < ll; k += width, l++) {
|
|
for (b = 0; b < numBuffers; b++) {
|
|
items[k + b] = colBuffers[b][l];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return {
|
|
width,
|
|
height,
|
|
items
|
|
};
|
|
};
|
|
|
|
return Transform;
|
|
}();
|
|
|
|
var IrreversibleTransform = function IrreversibleTransformClosure() {
|
|
function IrreversibleTransform() {
|
|
Transform.call(this);
|
|
}
|
|
|
|
IrreversibleTransform.prototype = Object.create(Transform.prototype);
|
|
|
|
IrreversibleTransform.prototype.filter = function irreversibleTransformFilter(x, offset, length) {
|
|
var len = length >> 1;
|
|
offset = offset | 0;
|
|
var j, n, current, next;
|
|
var alpha = -1.586134342059924;
|
|
var beta = -0.052980118572961;
|
|
var gamma = 0.882911075530934;
|
|
var delta = 0.443506852043971;
|
|
var K = 1.230174104914001;
|
|
var K_ = 1 / K;
|
|
j = offset - 3;
|
|
|
|
for (n = len + 4; n--; j += 2) {
|
|
x[j] *= K_;
|
|
}
|
|
|
|
j = offset - 2;
|
|
current = delta * x[j - 1];
|
|
|
|
for (n = len + 3; n--; j += 2) {
|
|
next = delta * x[j + 1];
|
|
x[j] = K * x[j] - current - next;
|
|
|
|
if (n--) {
|
|
j += 2;
|
|
current = delta * x[j + 1];
|
|
x[j] = K * x[j] - current - next;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
j = offset - 1;
|
|
current = gamma * x[j - 1];
|
|
|
|
for (n = len + 2; n--; j += 2) {
|
|
next = gamma * x[j + 1];
|
|
x[j] -= current + next;
|
|
|
|
if (n--) {
|
|
j += 2;
|
|
current = gamma * x[j + 1];
|
|
x[j] -= current + next;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
j = offset;
|
|
current = beta * x[j - 1];
|
|
|
|
for (n = len + 1; n--; j += 2) {
|
|
next = beta * x[j + 1];
|
|
x[j] -= current + next;
|
|
|
|
if (n--) {
|
|
j += 2;
|
|
current = beta * x[j + 1];
|
|
x[j] -= current + next;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (len !== 0) {
|
|
j = offset + 1;
|
|
current = alpha * x[j - 1];
|
|
|
|
for (n = len; n--; j += 2) {
|
|
next = alpha * x[j + 1];
|
|
x[j] -= current + next;
|
|
|
|
if (n--) {
|
|
j += 2;
|
|
current = alpha * x[j + 1];
|
|
x[j] -= current + next;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
return IrreversibleTransform;
|
|
}();
|
|
|
|
var ReversibleTransform = function ReversibleTransformClosure() {
|
|
function ReversibleTransform() {
|
|
Transform.call(this);
|
|
}
|
|
|
|
ReversibleTransform.prototype = Object.create(Transform.prototype);
|
|
|
|
ReversibleTransform.prototype.filter = function reversibleTransformFilter(x, offset, length) {
|
|
var len = length >> 1;
|
|
offset = offset | 0;
|
|
var j, n;
|
|
|
|
for (j = offset, n = len + 1; n--; j += 2) {
|
|
x[j] -= x[j - 1] + x[j + 1] + 2 >> 2;
|
|
}
|
|
|
|
for (j = offset + 1, n = len; n--; j += 2) {
|
|
x[j] += x[j - 1] + x[j + 1] >> 1;
|
|
}
|
|
};
|
|
|
|
return ReversibleTransform;
|
|
}();
|
|
|
|
return JpxImage;
|
|
}();
|
|
|
|
exports.JpxImage = JpxImage;
|
|
|
|
/***/ })
|
|
/******/ ]);
|
|
});
|
|
//# sourceMappingURL=pdf.image_decoders.js.map
|