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23 | (function webpackUniversalModuleDefinition(root, factory) {
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24 | if(typeof exports === 'object' && typeof module === 'object')
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25 | module.exports = factory();
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26 | else if(typeof define === 'function' && define.amd)
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27 | define("pdfjs-dist/image_decoders/pdf.image_decoders", [], factory);
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28 | else if(typeof exports === 'object')
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29 | exports["pdfjs-dist/image_decoders/pdf.image_decoders"] = factory();
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30 | else
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31 | root["pdfjs-dist/image_decoders/pdf.image_decoders"] = root.pdfjsImageDecoders = factory();
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32 | })(globalThis, () => {
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33 | return (() => {
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34 | "use strict";
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35 | var __webpack_modules__ = ([
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36 | ,
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37 |
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38 | ((__unused_webpack_module, exports, __w_pdfjs_require__) => {
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39 |
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40 |
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41 |
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42 | Object.defineProperty(exports, "__esModule", ({
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43 | value: true
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44 | }));
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45 | exports.VerbosityLevel = exports.Util = exports.UnknownErrorException = exports.UnexpectedResponseException = exports.UNSUPPORTED_FEATURES = exports.TextRenderingMode = exports.StreamType = exports.RenderingIntentFlag = exports.PermissionFlag = exports.PasswordResponses = exports.PasswordException = exports.PageActionEventType = exports.OPS = exports.MissingPDFException = exports.LINE_FACTOR = exports.LINE_DESCENT_FACTOR = exports.InvalidPDFException = exports.ImageKind = exports.IDENTITY_MATRIX = exports.FormatError = exports.FontType = exports.FeatureTest = exports.FONT_IDENTITY_MATRIX = exports.DocumentActionEventType = exports.CMapCompressionType = exports.BaseException = exports.AnnotationType = exports.AnnotationStateModelType = exports.AnnotationReviewState = exports.AnnotationReplyType = exports.AnnotationMode = exports.AnnotationMarkedState = exports.AnnotationFlag = exports.AnnotationFieldFlag = exports.AnnotationEditorType = exports.AnnotationEditorPrefix = exports.AnnotationEditorParamsType = exports.AnnotationBorderStyleType = exports.AnnotationActionEventType = exports.AbortException = void 0;
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46 | exports.arrayByteLength = arrayByteLength;
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47 | exports.arraysToBytes = arraysToBytes;
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48 | exports.assert = assert;
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49 | exports.bytesToString = bytesToString;
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50 | exports.createPromiseCapability = createPromiseCapability;
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51 | exports.createValidAbsoluteUrl = createValidAbsoluteUrl;
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52 | exports.escapeString = escapeString;
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53 | exports.getModificationDate = getModificationDate;
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54 | exports.getVerbosityLevel = getVerbosityLevel;
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55 | exports.info = info;
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56 | exports.isArrayBuffer = isArrayBuffer;
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57 | exports.isArrayEqual = isArrayEqual;
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58 | exports.isAscii = isAscii;
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59 | exports.objectFromMap = objectFromMap;
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60 | exports.objectSize = objectSize;
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61 | exports.setVerbosityLevel = setVerbosityLevel;
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62 | exports.shadow = shadow;
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63 | exports.string32 = string32;
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64 | exports.stringToBytes = stringToBytes;
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65 | exports.stringToPDFString = stringToPDFString;
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66 | exports.stringToUTF16BEString = stringToUTF16BEString;
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67 | exports.stringToUTF8String = stringToUTF8String;
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68 | exports.unreachable = unreachable;
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69 | exports.utf8StringToString = utf8StringToString;
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70 | exports.warn = warn;
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71 |
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72 | __w_pdfjs_require__(2);
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73 |
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74 | const IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];
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75 | exports.IDENTITY_MATRIX = IDENTITY_MATRIX;
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76 | const FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0];
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77 | exports.FONT_IDENTITY_MATRIX = FONT_IDENTITY_MATRIX;
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78 | const LINE_FACTOR = 1.35;
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79 | exports.LINE_FACTOR = LINE_FACTOR;
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80 | const LINE_DESCENT_FACTOR = 0.35;
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81 | exports.LINE_DESCENT_FACTOR = LINE_DESCENT_FACTOR;
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82 | const RenderingIntentFlag = {
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83 | ANY: 0x01,
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84 | DISPLAY: 0x02,
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85 | PRINT: 0x04,
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86 | ANNOTATIONS_FORMS: 0x10,
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87 | ANNOTATIONS_STORAGE: 0x20,
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88 | ANNOTATIONS_DISABLE: 0x40,
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89 | OPLIST: 0x100
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90 | };
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91 | exports.RenderingIntentFlag = RenderingIntentFlag;
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92 | const AnnotationMode = {
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93 | DISABLE: 0,
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94 | ENABLE: 1,
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95 | ENABLE_FORMS: 2,
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96 | ENABLE_STORAGE: 3
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97 | };
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98 | exports.AnnotationMode = AnnotationMode;
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99 | const AnnotationEditorPrefix = "pdfjs_internal_editor_";
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100 | exports.AnnotationEditorPrefix = AnnotationEditorPrefix;
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101 | const AnnotationEditorType = {
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102 | DISABLE: -1,
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103 | NONE: 0,
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104 | FREETEXT: 3,
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105 | INK: 15
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106 | };
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107 | exports.AnnotationEditorType = AnnotationEditorType;
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108 | const AnnotationEditorParamsType = {
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109 | FREETEXT_SIZE: 1,
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110 | FREETEXT_COLOR: 2,
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111 | FREETEXT_OPACITY: 3,
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112 | INK_COLOR: 11,
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113 | INK_THICKNESS: 12,
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114 | INK_OPACITY: 13
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115 | };
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116 | exports.AnnotationEditorParamsType = AnnotationEditorParamsType;
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117 | const PermissionFlag = {
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118 | PRINT: 0x04,
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119 | MODIFY_CONTENTS: 0x08,
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120 | COPY: 0x10,
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121 | MODIFY_ANNOTATIONS: 0x20,
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122 | FILL_INTERACTIVE_FORMS: 0x100,
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123 | COPY_FOR_ACCESSIBILITY: 0x200,
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124 | ASSEMBLE: 0x400,
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125 | PRINT_HIGH_QUALITY: 0x800
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126 | };
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127 | exports.PermissionFlag = PermissionFlag;
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128 | const TextRenderingMode = {
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129 | FILL: 0,
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130 | STROKE: 1,
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131 | FILL_STROKE: 2,
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132 | INVISIBLE: 3,
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133 | FILL_ADD_TO_PATH: 4,
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134 | STROKE_ADD_TO_PATH: 5,
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135 | FILL_STROKE_ADD_TO_PATH: 6,
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136 | ADD_TO_PATH: 7,
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137 | FILL_STROKE_MASK: 3,
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138 | ADD_TO_PATH_FLAG: 4
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139 | };
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140 | exports.TextRenderingMode = TextRenderingMode;
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141 | const ImageKind = {
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142 | GRAYSCALE_1BPP: 1,
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143 | RGB_24BPP: 2,
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144 | RGBA_32BPP: 3
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145 | };
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146 | exports.ImageKind = ImageKind;
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147 | const AnnotationType = {
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148 | TEXT: 1,
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149 | LINK: 2,
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150 | FREETEXT: 3,
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151 | LINE: 4,
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152 | SQUARE: 5,
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153 | CIRCLE: 6,
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154 | POLYGON: 7,
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155 | POLYLINE: 8,
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156 | HIGHLIGHT: 9,
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157 | UNDERLINE: 10,
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158 | SQUIGGLY: 11,
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159 | STRIKEOUT: 12,
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160 | STAMP: 13,
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161 | CARET: 14,
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162 | INK: 15,
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163 | POPUP: 16,
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164 | FILEATTACHMENT: 17,
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165 | SOUND: 18,
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166 | MOVIE: 19,
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167 | WIDGET: 20,
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168 | SCREEN: 21,
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169 | PRINTERMARK: 22,
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170 | TRAPNET: 23,
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171 | WATERMARK: 24,
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172 | THREED: 25,
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173 | REDACT: 26
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174 | };
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175 | exports.AnnotationType = AnnotationType;
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176 | const AnnotationStateModelType = {
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177 | MARKED: "Marked",
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178 | REVIEW: "Review"
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179 | };
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180 | exports.AnnotationStateModelType = AnnotationStateModelType;
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181 | const AnnotationMarkedState = {
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182 | MARKED: "Marked",
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183 | UNMARKED: "Unmarked"
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184 | };
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185 | exports.AnnotationMarkedState = AnnotationMarkedState;
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186 | const AnnotationReviewState = {
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187 | ACCEPTED: "Accepted",
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188 | REJECTED: "Rejected",
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189 | CANCELLED: "Cancelled",
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190 | COMPLETED: "Completed",
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191 | NONE: "None"
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192 | };
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193 | exports.AnnotationReviewState = AnnotationReviewState;
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194 | const AnnotationReplyType = {
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195 | GROUP: "Group",
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196 | REPLY: "R"
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197 | };
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198 | exports.AnnotationReplyType = AnnotationReplyType;
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199 | const AnnotationFlag = {
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200 | INVISIBLE: 0x01,
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201 | HIDDEN: 0x02,
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202 | PRINT: 0x04,
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203 | NOZOOM: 0x08,
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204 | NOROTATE: 0x10,
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205 | NOVIEW: 0x20,
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206 | READONLY: 0x40,
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207 | LOCKED: 0x80,
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208 | TOGGLENOVIEW: 0x100,
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209 | LOCKEDCONTENTS: 0x200
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210 | };
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211 | exports.AnnotationFlag = AnnotationFlag;
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212 | const AnnotationFieldFlag = {
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213 | READONLY: 0x0000001,
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214 | REQUIRED: 0x0000002,
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215 | NOEXPORT: 0x0000004,
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216 | MULTILINE: 0x0001000,
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217 | PASSWORD: 0x0002000,
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218 | NOTOGGLETOOFF: 0x0004000,
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219 | RADIO: 0x0008000,
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220 | PUSHBUTTON: 0x0010000,
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221 | COMBO: 0x0020000,
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222 | EDIT: 0x0040000,
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223 | SORT: 0x0080000,
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224 | FILESELECT: 0x0100000,
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225 | MULTISELECT: 0x0200000,
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226 | DONOTSPELLCHECK: 0x0400000,
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227 | DONOTSCROLL: 0x0800000,
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228 | COMB: 0x1000000,
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229 | RICHTEXT: 0x2000000,
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230 | RADIOSINUNISON: 0x2000000,
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231 | COMMITONSELCHANGE: 0x4000000
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232 | };
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233 | exports.AnnotationFieldFlag = AnnotationFieldFlag;
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234 | const AnnotationBorderStyleType = {
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235 | SOLID: 1,
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236 | DASHED: 2,
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237 | BEVELED: 3,
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238 | INSET: 4,
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239 | UNDERLINE: 5
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240 | };
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241 | exports.AnnotationBorderStyleType = AnnotationBorderStyleType;
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242 | const AnnotationActionEventType = {
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243 | E: "Mouse Enter",
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244 | X: "Mouse Exit",
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245 | D: "Mouse Down",
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246 | U: "Mouse Up",
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247 | Fo: "Focus",
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248 | Bl: "Blur",
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249 | PO: "PageOpen",
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250 | PC: "PageClose",
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251 | PV: "PageVisible",
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252 | PI: "PageInvisible",
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253 | K: "Keystroke",
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254 | F: "Format",
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255 | V: "Validate",
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256 | C: "Calculate"
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257 | };
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258 | exports.AnnotationActionEventType = AnnotationActionEventType;
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259 | const DocumentActionEventType = {
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260 | WC: "WillClose",
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261 | WS: "WillSave",
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262 | DS: "DidSave",
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263 | WP: "WillPrint",
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264 | DP: "DidPrint"
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265 | };
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266 | exports.DocumentActionEventType = DocumentActionEventType;
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267 | const PageActionEventType = {
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268 | O: "PageOpen",
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269 | C: "PageClose"
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270 | };
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271 | exports.PageActionEventType = PageActionEventType;
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272 | const StreamType = {
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273 | UNKNOWN: "UNKNOWN",
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274 | FLATE: "FLATE",
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275 | LZW: "LZW",
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276 | DCT: "DCT",
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277 | JPX: "JPX",
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278 | JBIG: "JBIG",
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279 | A85: "A85",
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280 | AHX: "AHX",
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281 | CCF: "CCF",
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282 | RLX: "RLX"
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283 | };
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284 | exports.StreamType = StreamType;
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285 | const FontType = {
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286 | UNKNOWN: "UNKNOWN",
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287 | TYPE1: "TYPE1",
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288 | TYPE1STANDARD: "TYPE1STANDARD",
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289 | TYPE1C: "TYPE1C",
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290 | CIDFONTTYPE0: "CIDFONTTYPE0",
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291 | CIDFONTTYPE0C: "CIDFONTTYPE0C",
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292 | TRUETYPE: "TRUETYPE",
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293 | CIDFONTTYPE2: "CIDFONTTYPE2",
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294 | TYPE3: "TYPE3",
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295 | OPENTYPE: "OPENTYPE",
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296 | TYPE0: "TYPE0",
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297 | MMTYPE1: "MMTYPE1"
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298 | };
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299 | exports.FontType = FontType;
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300 | const VerbosityLevel = {
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301 | ERRORS: 0,
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302 | WARNINGS: 1,
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303 | INFOS: 5
|
304 | };
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305 | exports.VerbosityLevel = VerbosityLevel;
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306 | const CMapCompressionType = {
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307 | NONE: 0,
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308 | BINARY: 1,
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309 | STREAM: 2
|
310 | };
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311 | exports.CMapCompressionType = CMapCompressionType;
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312 | const OPS = {
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313 | dependency: 1,
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314 | setLineWidth: 2,
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315 | setLineCap: 3,
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316 | setLineJoin: 4,
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317 | setMiterLimit: 5,
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318 | setDash: 6,
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319 | setRenderingIntent: 7,
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320 | setFlatness: 8,
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321 | setGState: 9,
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322 | save: 10,
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323 | restore: 11,
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324 | transform: 12,
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325 | moveTo: 13,
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326 | lineTo: 14,
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327 | curveTo: 15,
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328 | curveTo2: 16,
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329 | curveTo3: 17,
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330 | closePath: 18,
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331 | rectangle: 19,
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332 | stroke: 20,
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333 | closeStroke: 21,
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334 | fill: 22,
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335 | eoFill: 23,
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336 | fillStroke: 24,
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337 | eoFillStroke: 25,
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338 | closeFillStroke: 26,
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339 | closeEOFillStroke: 27,
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340 | endPath: 28,
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341 | clip: 29,
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342 | eoClip: 30,
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343 | beginText: 31,
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344 | endText: 32,
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345 | setCharSpacing: 33,
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346 | setWordSpacing: 34,
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347 | setHScale: 35,
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348 | setLeading: 36,
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349 | setFont: 37,
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350 | setTextRenderingMode: 38,
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351 | setTextRise: 39,
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352 | moveText: 40,
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353 | setLeadingMoveText: 41,
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354 | setTextMatrix: 42,
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355 | nextLine: 43,
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356 | showText: 44,
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357 | showSpacedText: 45,
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358 | nextLineShowText: 46,
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359 | nextLineSetSpacingShowText: 47,
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360 | setCharWidth: 48,
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361 | setCharWidthAndBounds: 49,
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362 | setStrokeColorSpace: 50,
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363 | setFillColorSpace: 51,
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364 | setStrokeColor: 52,
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365 | setStrokeColorN: 53,
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366 | setFillColor: 54,
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367 | setFillColorN: 55,
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368 | setStrokeGray: 56,
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369 | setFillGray: 57,
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370 | setStrokeRGBColor: 58,
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371 | setFillRGBColor: 59,
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372 | setStrokeCMYKColor: 60,
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373 | setFillCMYKColor: 61,
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374 | shadingFill: 62,
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375 | beginInlineImage: 63,
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376 | beginImageData: 64,
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377 | endInlineImage: 65,
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378 | paintXObject: 66,
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379 | markPoint: 67,
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380 | markPointProps: 68,
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381 | beginMarkedContent: 69,
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382 | beginMarkedContentProps: 70,
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383 | endMarkedContent: 71,
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384 | beginCompat: 72,
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385 | endCompat: 73,
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386 | paintFormXObjectBegin: 74,
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387 | paintFormXObjectEnd: 75,
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388 | beginGroup: 76,
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389 | endGroup: 77,
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390 | beginAnnotations: 78,
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391 | endAnnotations: 79,
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392 | beginAnnotation: 80,
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393 | endAnnotation: 81,
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394 | paintJpegXObject: 82,
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395 | paintImageMaskXObject: 83,
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396 | paintImageMaskXObjectGroup: 84,
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397 | paintImageXObject: 85,
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398 | paintInlineImageXObject: 86,
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399 | paintInlineImageXObjectGroup: 87,
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400 | paintImageXObjectRepeat: 88,
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401 | paintImageMaskXObjectRepeat: 89,
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402 | paintSolidColorImageMask: 90,
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403 | constructPath: 91
|
404 | };
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405 | exports.OPS = OPS;
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406 | const UNSUPPORTED_FEATURES = {
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407 | unknown: "unknown",
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408 | forms: "forms",
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409 | javaScript: "javaScript",
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410 | signatures: "signatures",
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411 | smask: "smask",
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412 | shadingPattern: "shadingPattern",
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413 | font: "font",
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414 | errorTilingPattern: "errorTilingPattern",
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415 | errorExtGState: "errorExtGState",
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416 | errorXObject: "errorXObject",
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417 | errorFontLoadType3: "errorFontLoadType3",
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418 | errorFontState: "errorFontState",
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419 | errorFontMissing: "errorFontMissing",
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420 | errorFontTranslate: "errorFontTranslate",
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421 | errorColorSpace: "errorColorSpace",
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422 | errorOperatorList: "errorOperatorList",
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423 | errorFontToUnicode: "errorFontToUnicode",
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424 | errorFontLoadNative: "errorFontLoadNative",
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425 | errorFontBuildPath: "errorFontBuildPath",
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426 | errorFontGetPath: "errorFontGetPath",
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427 | errorMarkedContent: "errorMarkedContent",
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428 | errorContentSubStream: "errorContentSubStream"
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429 | };
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430 | exports.UNSUPPORTED_FEATURES = UNSUPPORTED_FEATURES;
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431 | const PasswordResponses = {
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432 | NEED_PASSWORD: 1,
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433 | INCORRECT_PASSWORD: 2
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434 | };
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435 | exports.PasswordResponses = PasswordResponses;
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436 | let verbosity = VerbosityLevel.WARNINGS;
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437 |
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438 | function setVerbosityLevel(level) {
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439 | if (Number.isInteger(level)) {
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440 | verbosity = level;
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441 | }
|
442 | }
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443 |
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444 | function getVerbosityLevel() {
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445 | return verbosity;
|
446 | }
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447 |
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448 | function info(msg) {
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449 | if (verbosity >= VerbosityLevel.INFOS) {
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450 | console.log(`Info: ${msg}`);
|
451 | }
|
452 | }
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453 |
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454 | function warn(msg) {
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455 | if (verbosity >= VerbosityLevel.WARNINGS) {
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456 | console.log(`Warning: ${msg}`);
|
457 | }
|
458 | }
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459 |
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460 | function unreachable(msg) {
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461 | throw new Error(msg);
|
462 | }
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463 |
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464 | function assert(cond, msg) {
|
465 | if (!cond) {
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466 | unreachable(msg);
|
467 | }
|
468 | }
|
469 |
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470 | function _isValidProtocol(url) {
|
471 | if (!url) {
|
472 | return false;
|
473 | }
|
474 |
|
475 | switch (url.protocol) {
|
476 | case "http:":
|
477 | case "https:":
|
478 | case "ftp:":
|
479 | case "mailto:":
|
480 | case "tel:":
|
481 | return true;
|
482 |
|
483 | default:
|
484 | return false;
|
485 | }
|
486 | }
|
487 |
|
488 | function createValidAbsoluteUrl(url, baseUrl = null, options = null) {
|
489 | if (!url) {
|
490 | return null;
|
491 | }
|
492 |
|
493 | try {
|
494 | if (options && typeof url === "string") {
|
495 | if (options.addDefaultProtocol && url.startsWith("www.")) {
|
496 | const dots = url.match(/\./g);
|
497 |
|
498 | if (dots && dots.length >= 2) {
|
499 | url = `http://${url}`;
|
500 | }
|
501 | }
|
502 |
|
503 | if (options.tryConvertEncoding) {
|
504 | try {
|
505 | url = stringToUTF8String(url);
|
506 | } catch (ex) {}
|
507 | }
|
508 | }
|
509 |
|
510 | const absoluteUrl = baseUrl ? new URL(url, baseUrl) : new URL(url);
|
511 |
|
512 | if (_isValidProtocol(absoluteUrl)) {
|
513 | return absoluteUrl;
|
514 | }
|
515 | } catch (ex) {}
|
516 |
|
517 | return null;
|
518 | }
|
519 |
|
520 | function shadow(obj, prop, value) {
|
521 | Object.defineProperty(obj, prop, {
|
522 | value,
|
523 | enumerable: true,
|
524 | configurable: true,
|
525 | writable: false
|
526 | });
|
527 | return value;
|
528 | }
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529 |
|
530 | const BaseException = function BaseExceptionClosure() {
|
531 | function BaseException(message, name) {
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532 | if (this.constructor === BaseException) {
|
533 | unreachable("Cannot initialize BaseException.");
|
534 | }
|
535 |
|
536 | this.message = message;
|
537 | this.name = name;
|
538 | }
|
539 |
|
540 | BaseException.prototype = new Error();
|
541 | BaseException.constructor = BaseException;
|
542 | return BaseException;
|
543 | }();
|
544 |
|
545 | exports.BaseException = BaseException;
|
546 |
|
547 | class PasswordException extends BaseException {
|
548 | constructor(msg, code) {
|
549 | super(msg, "PasswordException");
|
550 | this.code = code;
|
551 | }
|
552 |
|
553 | }
|
554 |
|
555 | exports.PasswordException = PasswordException;
|
556 |
|
557 | class UnknownErrorException extends BaseException {
|
558 | constructor(msg, details) {
|
559 | super(msg, "UnknownErrorException");
|
560 | this.details = details;
|
561 | }
|
562 |
|
563 | }
|
564 |
|
565 | exports.UnknownErrorException = UnknownErrorException;
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566 |
|
567 | class InvalidPDFException extends BaseException {
|
568 | constructor(msg) {
|
569 | super(msg, "InvalidPDFException");
|
570 | }
|
571 |
|
572 | }
|
573 |
|
574 | exports.InvalidPDFException = InvalidPDFException;
|
575 |
|
576 | class MissingPDFException extends BaseException {
|
577 | constructor(msg) {
|
578 | super(msg, "MissingPDFException");
|
579 | }
|
580 |
|
581 | }
|
582 |
|
583 | exports.MissingPDFException = MissingPDFException;
|
584 |
|
585 | class UnexpectedResponseException extends BaseException {
|
586 | constructor(msg, status) {
|
587 | super(msg, "UnexpectedResponseException");
|
588 | this.status = status;
|
589 | }
|
590 |
|
591 | }
|
592 |
|
593 | exports.UnexpectedResponseException = UnexpectedResponseException;
|
594 |
|
595 | class FormatError extends BaseException {
|
596 | constructor(msg) {
|
597 | super(msg, "FormatError");
|
598 | }
|
599 |
|
600 | }
|
601 |
|
602 | exports.FormatError = FormatError;
|
603 |
|
604 | class AbortException extends BaseException {
|
605 | constructor(msg) {
|
606 | super(msg, "AbortException");
|
607 | }
|
608 |
|
609 | }
|
610 |
|
611 | exports.AbortException = AbortException;
|
612 |
|
613 | function bytesToString(bytes) {
|
614 | if (typeof bytes !== "object" || bytes === null || bytes.length === undefined) {
|
615 | unreachable("Invalid argument for bytesToString");
|
616 | }
|
617 |
|
618 | const length = bytes.length;
|
619 | const MAX_ARGUMENT_COUNT = 8192;
|
620 |
|
621 | if (length < MAX_ARGUMENT_COUNT) {
|
622 | return String.fromCharCode.apply(null, bytes);
|
623 | }
|
624 |
|
625 | const strBuf = [];
|
626 |
|
627 | for (let i = 0; i < length; i += MAX_ARGUMENT_COUNT) {
|
628 | const chunkEnd = Math.min(i + MAX_ARGUMENT_COUNT, length);
|
629 | const chunk = bytes.subarray(i, chunkEnd);
|
630 | strBuf.push(String.fromCharCode.apply(null, chunk));
|
631 | }
|
632 |
|
633 | return strBuf.join("");
|
634 | }
|
635 |
|
636 | function stringToBytes(str) {
|
637 | if (typeof str !== "string") {
|
638 | unreachable("Invalid argument for stringToBytes");
|
639 | }
|
640 |
|
641 | const length = str.length;
|
642 | const bytes = new Uint8Array(length);
|
643 |
|
644 | for (let i = 0; i < length; ++i) {
|
645 | bytes[i] = str.charCodeAt(i) & 0xff;
|
646 | }
|
647 |
|
648 | return bytes;
|
649 | }
|
650 |
|
651 | function arrayByteLength(arr) {
|
652 | if (arr.length !== undefined) {
|
653 | return arr.length;
|
654 | }
|
655 |
|
656 | if (arr.byteLength !== undefined) {
|
657 | return arr.byteLength;
|
658 | }
|
659 |
|
660 | unreachable("Invalid argument for arrayByteLength");
|
661 | }
|
662 |
|
663 | function arraysToBytes(arr) {
|
664 | const length = arr.length;
|
665 |
|
666 | if (length === 1 && arr[0] instanceof Uint8Array) {
|
667 | return arr[0];
|
668 | }
|
669 |
|
670 | let resultLength = 0;
|
671 |
|
672 | for (let i = 0; i < length; i++) {
|
673 | resultLength += arrayByteLength(arr[i]);
|
674 | }
|
675 |
|
676 | let pos = 0;
|
677 | const data = new Uint8Array(resultLength);
|
678 |
|
679 | for (let i = 0; i < length; i++) {
|
680 | let item = arr[i];
|
681 |
|
682 | if (!(item instanceof Uint8Array)) {
|
683 | if (typeof item === "string") {
|
684 | item = stringToBytes(item);
|
685 | } else {
|
686 | item = new Uint8Array(item);
|
687 | }
|
688 | }
|
689 |
|
690 | const itemLength = item.byteLength;
|
691 | data.set(item, pos);
|
692 | pos += itemLength;
|
693 | }
|
694 |
|
695 | return data;
|
696 | }
|
697 |
|
698 | function string32(value) {
|
699 | return String.fromCharCode(value >> 24 & 0xff, value >> 16 & 0xff, value >> 8 & 0xff, value & 0xff);
|
700 | }
|
701 |
|
702 | function objectSize(obj) {
|
703 | return Object.keys(obj).length;
|
704 | }
|
705 |
|
706 | function objectFromMap(map) {
|
707 | const obj = Object.create(null);
|
708 |
|
709 | for (const [key, value] of map) {
|
710 | obj[key] = value;
|
711 | }
|
712 |
|
713 | return obj;
|
714 | }
|
715 |
|
716 | function isLittleEndian() {
|
717 | const buffer8 = new Uint8Array(4);
|
718 | buffer8[0] = 1;
|
719 | const view32 = new Uint32Array(buffer8.buffer, 0, 1);
|
720 | return view32[0] === 1;
|
721 | }
|
722 |
|
723 | function isEvalSupported() {
|
724 | try {
|
725 | new Function("");
|
726 | return true;
|
727 | } catch (e) {
|
728 | return false;
|
729 | }
|
730 | }
|
731 |
|
732 | class FeatureTest {
|
733 | static get isLittleEndian() {
|
734 | return shadow(this, "isLittleEndian", isLittleEndian());
|
735 | }
|
736 |
|
737 | static get isEvalSupported() {
|
738 | return shadow(this, "isEvalSupported", isEvalSupported());
|
739 | }
|
740 |
|
741 | static get isOffscreenCanvasSupported() {
|
742 | return shadow(this, "isOffscreenCanvasSupported", typeof OffscreenCanvas !== "undefined");
|
743 | }
|
744 |
|
745 | }
|
746 |
|
747 | exports.FeatureTest = FeatureTest;
|
748 | const hexNumbers = [...Array(256).keys()].map(n => n.toString(16).padStart(2, "0"));
|
749 |
|
750 | class Util {
|
751 | static makeHexColor(r, g, b) {
|
752 | return `#${hexNumbers[r]}${hexNumbers[g]}${hexNumbers[b]}`;
|
753 | }
|
754 |
|
755 | static scaleMinMax(transform, minMax) {
|
756 | let temp;
|
757 |
|
758 | if (transform[0]) {
|
759 | if (transform[0] < 0) {
|
760 | temp = minMax[0];
|
761 | minMax[0] = minMax[1];
|
762 | minMax[1] = temp;
|
763 | }
|
764 |
|
765 | minMax[0] *= transform[0];
|
766 | minMax[1] *= transform[0];
|
767 |
|
768 | if (transform[3] < 0) {
|
769 | temp = minMax[2];
|
770 | minMax[2] = minMax[3];
|
771 | minMax[3] = temp;
|
772 | }
|
773 |
|
774 | minMax[2] *= transform[3];
|
775 | minMax[3] *= transform[3];
|
776 | } else {
|
777 | temp = minMax[0];
|
778 | minMax[0] = minMax[2];
|
779 | minMax[2] = temp;
|
780 | temp = minMax[1];
|
781 | minMax[1] = minMax[3];
|
782 | minMax[3] = temp;
|
783 |
|
784 | if (transform[1] < 0) {
|
785 | temp = minMax[2];
|
786 | minMax[2] = minMax[3];
|
787 | minMax[3] = temp;
|
788 | }
|
789 |
|
790 | minMax[2] *= transform[1];
|
791 | minMax[3] *= transform[1];
|
792 |
|
793 | if (transform[2] < 0) {
|
794 | temp = minMax[0];
|
795 | minMax[0] = minMax[1];
|
796 | minMax[1] = temp;
|
797 | }
|
798 |
|
799 | minMax[0] *= transform[2];
|
800 | minMax[1] *= transform[2];
|
801 | }
|
802 |
|
803 | minMax[0] += transform[4];
|
804 | minMax[1] += transform[4];
|
805 | minMax[2] += transform[5];
|
806 | minMax[3] += transform[5];
|
807 | }
|
808 |
|
809 | static transform(m1, m2) {
|
810 | 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]];
|
811 | }
|
812 |
|
813 | static applyTransform(p, m) {
|
814 | const xt = p[0] * m[0] + p[1] * m[2] + m[4];
|
815 | const yt = p[0] * m[1] + p[1] * m[3] + m[5];
|
816 | return [xt, yt];
|
817 | }
|
818 |
|
819 | static applyInverseTransform(p, m) {
|
820 | const d = m[0] * m[3] - m[1] * m[2];
|
821 | const xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d;
|
822 | const yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d;
|
823 | return [xt, yt];
|
824 | }
|
825 |
|
826 | static getAxialAlignedBoundingBox(r, m) {
|
827 | const p1 = Util.applyTransform(r, m);
|
828 | const p2 = Util.applyTransform(r.slice(2, 4), m);
|
829 | const p3 = Util.applyTransform([r[0], r[3]], m);
|
830 | const p4 = Util.applyTransform([r[2], r[1]], m);
|
831 | 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])];
|
832 | }
|
833 |
|
834 | static inverseTransform(m) {
|
835 | const d = m[0] * m[3] - m[1] * m[2];
|
836 | 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];
|
837 | }
|
838 |
|
839 | static apply3dTransform(m, v) {
|
840 | 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]];
|
841 | }
|
842 |
|
843 | static singularValueDecompose2dScale(m) {
|
844 | const transpose = [m[0], m[2], m[1], m[3]];
|
845 | const a = m[0] * transpose[0] + m[1] * transpose[2];
|
846 | const b = m[0] * transpose[1] + m[1] * transpose[3];
|
847 | const c = m[2] * transpose[0] + m[3] * transpose[2];
|
848 | const d = m[2] * transpose[1] + m[3] * transpose[3];
|
849 | const first = (a + d) / 2;
|
850 | const second = Math.sqrt((a + d) ** 2 - 4 * (a * d - c * b)) / 2;
|
851 | const sx = first + second || 1;
|
852 | const sy = first - second || 1;
|
853 | return [Math.sqrt(sx), Math.sqrt(sy)];
|
854 | }
|
855 |
|
856 | static normalizeRect(rect) {
|
857 | const r = rect.slice(0);
|
858 |
|
859 | if (rect[0] > rect[2]) {
|
860 | r[0] = rect[2];
|
861 | r[2] = rect[0];
|
862 | }
|
863 |
|
864 | if (rect[1] > rect[3]) {
|
865 | r[1] = rect[3];
|
866 | r[3] = rect[1];
|
867 | }
|
868 |
|
869 | return r;
|
870 | }
|
871 |
|
872 | static intersect(rect1, rect2) {
|
873 | const xLow = Math.max(Math.min(rect1[0], rect1[2]), Math.min(rect2[0], rect2[2]));
|
874 | const xHigh = Math.min(Math.max(rect1[0], rect1[2]), Math.max(rect2[0], rect2[2]));
|
875 |
|
876 | if (xLow > xHigh) {
|
877 | return null;
|
878 | }
|
879 |
|
880 | const yLow = Math.max(Math.min(rect1[1], rect1[3]), Math.min(rect2[1], rect2[3]));
|
881 | const yHigh = Math.min(Math.max(rect1[1], rect1[3]), Math.max(rect2[1], rect2[3]));
|
882 |
|
883 | if (yLow > yHigh) {
|
884 | return null;
|
885 | }
|
886 |
|
887 | return [xLow, yLow, xHigh, yHigh];
|
888 | }
|
889 |
|
890 | static bezierBoundingBox(x0, y0, x1, y1, x2, y2, x3, y3) {
|
891 | const tvalues = [],
|
892 | bounds = [[], []];
|
893 | let a, b, c, t, t1, t2, b2ac, sqrtb2ac;
|
894 |
|
895 | for (let i = 0; i < 2; ++i) {
|
896 | if (i === 0) {
|
897 | b = 6 * x0 - 12 * x1 + 6 * x2;
|
898 | a = -3 * x0 + 9 * x1 - 9 * x2 + 3 * x3;
|
899 | c = 3 * x1 - 3 * x0;
|
900 | } else {
|
901 | b = 6 * y0 - 12 * y1 + 6 * y2;
|
902 | a = -3 * y0 + 9 * y1 - 9 * y2 + 3 * y3;
|
903 | c = 3 * y1 - 3 * y0;
|
904 | }
|
905 |
|
906 | if (Math.abs(a) < 1e-12) {
|
907 | if (Math.abs(b) < 1e-12) {
|
908 | continue;
|
909 | }
|
910 |
|
911 | t = -c / b;
|
912 |
|
913 | if (0 < t && t < 1) {
|
914 | tvalues.push(t);
|
915 | }
|
916 |
|
917 | continue;
|
918 | }
|
919 |
|
920 | b2ac = b * b - 4 * c * a;
|
921 | sqrtb2ac = Math.sqrt(b2ac);
|
922 |
|
923 | if (b2ac < 0) {
|
924 | continue;
|
925 | }
|
926 |
|
927 | t1 = (-b + sqrtb2ac) / (2 * a);
|
928 |
|
929 | if (0 < t1 && t1 < 1) {
|
930 | tvalues.push(t1);
|
931 | }
|
932 |
|
933 | t2 = (-b - sqrtb2ac) / (2 * a);
|
934 |
|
935 | if (0 < t2 && t2 < 1) {
|
936 | tvalues.push(t2);
|
937 | }
|
938 | }
|
939 |
|
940 | let j = tvalues.length,
|
941 | mt;
|
942 | const jlen = j;
|
943 |
|
944 | while (j--) {
|
945 | t = tvalues[j];
|
946 | mt = 1 - t;
|
947 | bounds[0][j] = mt * mt * mt * x0 + 3 * mt * mt * t * x1 + 3 * mt * t * t * x2 + t * t * t * x3;
|
948 | bounds[1][j] = mt * mt * mt * y0 + 3 * mt * mt * t * y1 + 3 * mt * t * t * y2 + t * t * t * y3;
|
949 | }
|
950 |
|
951 | bounds[0][jlen] = x0;
|
952 | bounds[1][jlen] = y0;
|
953 | bounds[0][jlen + 1] = x3;
|
954 | bounds[1][jlen + 1] = y3;
|
955 | bounds[0].length = bounds[1].length = jlen + 2;
|
956 | return [Math.min(...bounds[0]), Math.min(...bounds[1]), Math.max(...bounds[0]), Math.max(...bounds[1])];
|
957 | }
|
958 |
|
959 | }
|
960 |
|
961 | exports.Util = Util;
|
962 | 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];
|
963 |
|
964 | function stringToPDFString(str) {
|
965 | if (str[0] >= "\xEF") {
|
966 | let encoding;
|
967 |
|
968 | if (str[0] === "\xFE" && str[1] === "\xFF") {
|
969 | encoding = "utf-16be";
|
970 | } else if (str[0] === "\xFF" && str[1] === "\xFE") {
|
971 | encoding = "utf-16le";
|
972 | } else if (str[0] === "\xEF" && str[1] === "\xBB" && str[2] === "\xBF") {
|
973 | encoding = "utf-8";
|
974 | }
|
975 |
|
976 | if (encoding) {
|
977 | try {
|
978 | const decoder = new TextDecoder(encoding, {
|
979 | fatal: true
|
980 | });
|
981 | const buffer = stringToBytes(str);
|
982 | return decoder.decode(buffer);
|
983 | } catch (ex) {
|
984 | warn(`stringToPDFString: "${ex}".`);
|
985 | }
|
986 | }
|
987 | }
|
988 |
|
989 | const strBuf = [];
|
990 |
|
991 | for (let i = 0, ii = str.length; i < ii; i++) {
|
992 | const code = PDFStringTranslateTable[str.charCodeAt(i)];
|
993 | strBuf.push(code ? String.fromCharCode(code) : str.charAt(i));
|
994 | }
|
995 |
|
996 | return strBuf.join("");
|
997 | }
|
998 |
|
999 | function escapeString(str) {
|
1000 | return str.replace(/([()\\\n\r])/g, match => {
|
1001 | if (match === "\n") {
|
1002 | return "\\n";
|
1003 | } else if (match === "\r") {
|
1004 | return "\\r";
|
1005 | }
|
1006 |
|
1007 | return `\\${match}`;
|
1008 | });
|
1009 | }
|
1010 |
|
1011 | function isAscii(str) {
|
1012 | return /^[\x00-\x7F]*$/.test(str);
|
1013 | }
|
1014 |
|
1015 | function stringToUTF16BEString(str) {
|
1016 | const buf = ["\xFE\xFF"];
|
1017 |
|
1018 | for (let i = 0, ii = str.length; i < ii; i++) {
|
1019 | const char = str.charCodeAt(i);
|
1020 | buf.push(String.fromCharCode(char >> 8 & 0xff), String.fromCharCode(char & 0xff));
|
1021 | }
|
1022 |
|
1023 | return buf.join("");
|
1024 | }
|
1025 |
|
1026 | function stringToUTF8String(str) {
|
1027 | return decodeURIComponent(escape(str));
|
1028 | }
|
1029 |
|
1030 | function utf8StringToString(str) {
|
1031 | return unescape(encodeURIComponent(str));
|
1032 | }
|
1033 |
|
1034 | function isArrayBuffer(v) {
|
1035 | return typeof v === "object" && v !== null && v.byteLength !== undefined;
|
1036 | }
|
1037 |
|
1038 | function isArrayEqual(arr1, arr2) {
|
1039 | if (arr1.length !== arr2.length) {
|
1040 | return false;
|
1041 | }
|
1042 |
|
1043 | for (let i = 0, ii = arr1.length; i < ii; i++) {
|
1044 | if (arr1[i] !== arr2[i]) {
|
1045 | return false;
|
1046 | }
|
1047 | }
|
1048 |
|
1049 | return true;
|
1050 | }
|
1051 |
|
1052 | function getModificationDate(date = new Date()) {
|
1053 | const buffer = [date.getUTCFullYear().toString(), (date.getUTCMonth() + 1).toString().padStart(2, "0"), date.getUTCDate().toString().padStart(2, "0"), date.getUTCHours().toString().padStart(2, "0"), date.getUTCMinutes().toString().padStart(2, "0"), date.getUTCSeconds().toString().padStart(2, "0")];
|
1054 | return buffer.join("");
|
1055 | }
|
1056 |
|
1057 | function createPromiseCapability() {
|
1058 | const capability = Object.create(null);
|
1059 | let isSettled = false;
|
1060 | Object.defineProperty(capability, "settled", {
|
1061 | get() {
|
1062 | return isSettled;
|
1063 | }
|
1064 |
|
1065 | });
|
1066 | capability.promise = new Promise(function (resolve, reject) {
|
1067 | capability.resolve = function (data) {
|
1068 | isSettled = true;
|
1069 | resolve(data);
|
1070 | };
|
1071 |
|
1072 | capability.reject = function (reason) {
|
1073 | isSettled = true;
|
1074 | reject(reason);
|
1075 | };
|
1076 | });
|
1077 | return capability;
|
1078 | }
|
1079 |
|
1080 | }),
|
1081 |
|
1082 | ((__unused_webpack_module, __unused_webpack_exports, __w_pdfjs_require__) => {
|
1083 |
|
1084 |
|
1085 |
|
1086 | var _is_node = __w_pdfjs_require__(3);
|
1087 |
|
1088 | ;
|
1089 |
|
1090 | }),
|
1091 |
|
1092 | ((__unused_webpack_module, exports) => {
|
1093 |
|
1094 |
|
1095 |
|
1096 | Object.defineProperty(exports, "__esModule", ({
|
1097 | value: true
|
1098 | }));
|
1099 | exports.isNodeJS = void 0;
|
1100 | const isNodeJS = typeof process === "object" && process + "" === "[object process]" && !process.versions.nw && !(process.versions.electron && process.type && process.type !== "browser");
|
1101 | exports.isNodeJS = isNodeJS;
|
1102 |
|
1103 | }),
|
1104 |
|
1105 | ((__unused_webpack_module, exports, __w_pdfjs_require__) => {
|
1106 |
|
1107 |
|
1108 |
|
1109 | Object.defineProperty(exports, "__esModule", ({
|
1110 | value: true
|
1111 | }));
|
1112 | exports.Jbig2Image = void 0;
|
1113 |
|
1114 | var _util = __w_pdfjs_require__(1);
|
1115 |
|
1116 | var _core_utils = __w_pdfjs_require__(5);
|
1117 |
|
1118 | var _arithmetic_decoder = __w_pdfjs_require__(8);
|
1119 |
|
1120 | var _ccitt = __w_pdfjs_require__(9);
|
1121 |
|
1122 | class Jbig2Error extends _util.BaseException {
|
1123 | constructor(msg) {
|
1124 | super(`JBIG2 error: ${msg}`, "Jbig2Error");
|
1125 | }
|
1126 |
|
1127 | }
|
1128 |
|
1129 | class ContextCache {
|
1130 | getContexts(id) {
|
1131 | if (id in this) {
|
1132 | return this[id];
|
1133 | }
|
1134 |
|
1135 | return this[id] = new Int8Array(1 << 16);
|
1136 | }
|
1137 |
|
1138 | }
|
1139 |
|
1140 | class DecodingContext {
|
1141 | constructor(data, start, end) {
|
1142 | this.data = data;
|
1143 | this.start = start;
|
1144 | this.end = end;
|
1145 | }
|
1146 |
|
1147 | get decoder() {
|
1148 | const decoder = new _arithmetic_decoder.ArithmeticDecoder(this.data, this.start, this.end);
|
1149 | return (0, _util.shadow)(this, "decoder", decoder);
|
1150 | }
|
1151 |
|
1152 | get contextCache() {
|
1153 | const cache = new ContextCache();
|
1154 | return (0, _util.shadow)(this, "contextCache", cache);
|
1155 | }
|
1156 |
|
1157 | }
|
1158 |
|
1159 | function decodeInteger(contextCache, procedure, decoder) {
|
1160 | const contexts = contextCache.getContexts(procedure);
|
1161 | let prev = 1;
|
1162 |
|
1163 | function readBits(length) {
|
1164 | let v = 0;
|
1165 |
|
1166 | for (let i = 0; i < length; i++) {
|
1167 | const bit = decoder.readBit(contexts, prev);
|
1168 | prev = prev < 256 ? prev << 1 | bit : (prev << 1 | bit) & 511 | 256;
|
1169 | v = v << 1 | bit;
|
1170 | }
|
1171 |
|
1172 | return v >>> 0;
|
1173 | }
|
1174 |
|
1175 | const sign = readBits(1);
|
1176 | const 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);
|
1177 |
|
1178 | if (sign === 0) {
|
1179 | return value;
|
1180 | } else if (value > 0) {
|
1181 | return -value;
|
1182 | }
|
1183 |
|
1184 | return null;
|
1185 | }
|
1186 |
|
1187 | function decodeIAID(contextCache, decoder, codeLength) {
|
1188 | const contexts = contextCache.getContexts("IAID");
|
1189 | let prev = 1;
|
1190 |
|
1191 | for (let i = 0; i < codeLength; i++) {
|
1192 | const bit = decoder.readBit(contexts, prev);
|
1193 | prev = prev << 1 | bit;
|
1194 | }
|
1195 |
|
1196 | if (codeLength < 31) {
|
1197 | return prev & (1 << codeLength) - 1;
|
1198 | }
|
1199 |
|
1200 | return prev & 0x7fffffff;
|
1201 | }
|
1202 |
|
1203 | const 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"];
|
1204 | const CodingTemplates = [[{
|
1205 | x: -1,
|
1206 | y: -2
|
1207 | }, {
|
1208 | x: 0,
|
1209 | y: -2
|
1210 | }, {
|
1211 | x: 1,
|
1212 | y: -2
|
1213 | }, {
|
1214 | x: -2,
|
1215 | y: -1
|
1216 | }, {
|
1217 | x: -1,
|
1218 | y: -1
|
1219 | }, {
|
1220 | x: 0,
|
1221 | y: -1
|
1222 | }, {
|
1223 | x: 1,
|
1224 | y: -1
|
1225 | }, {
|
1226 | x: 2,
|
1227 | y: -1
|
1228 | }, {
|
1229 | x: -4,
|
1230 | y: 0
|
1231 | }, {
|
1232 | x: -3,
|
1233 | y: 0
|
1234 | }, {
|
1235 | x: -2,
|
1236 | y: 0
|
1237 | }, {
|
1238 | x: -1,
|
1239 | y: 0
|
1240 | }], [{
|
1241 | x: -1,
|
1242 | y: -2
|
1243 | }, {
|
1244 | x: 0,
|
1245 | y: -2
|
1246 | }, {
|
1247 | x: 1,
|
1248 | y: -2
|
1249 | }, {
|
1250 | x: 2,
|
1251 | y: -2
|
1252 | }, {
|
1253 | x: -2,
|
1254 | y: -1
|
1255 | }, {
|
1256 | x: -1,
|
1257 | y: -1
|
1258 | }, {
|
1259 | x: 0,
|
1260 | y: -1
|
1261 | }, {
|
1262 | x: 1,
|
1263 | y: -1
|
1264 | }, {
|
1265 | x: 2,
|
1266 | y: -1
|
1267 | }, {
|
1268 | x: -3,
|
1269 | y: 0
|
1270 | }, {
|
1271 | x: -2,
|
1272 | y: 0
|
1273 | }, {
|
1274 | x: -1,
|
1275 | y: 0
|
1276 | }], [{
|
1277 | x: -1,
|
1278 | y: -2
|
1279 | }, {
|
1280 | x: 0,
|
1281 | y: -2
|
1282 | }, {
|
1283 | x: 1,
|
1284 | y: -2
|
1285 | }, {
|
1286 | x: -2,
|
1287 | y: -1
|
1288 | }, {
|
1289 | x: -1,
|
1290 | y: -1
|
1291 | }, {
|
1292 | x: 0,
|
1293 | y: -1
|
1294 | }, {
|
1295 | x: 1,
|
1296 | y: -1
|
1297 | }, {
|
1298 | x: -2,
|
1299 | y: 0
|
1300 | }, {
|
1301 | x: -1,
|
1302 | y: 0
|
1303 | }], [{
|
1304 | x: -3,
|
1305 | y: -1
|
1306 | }, {
|
1307 | x: -2,
|
1308 | y: -1
|
1309 | }, {
|
1310 | x: -1,
|
1311 | y: -1
|
1312 | }, {
|
1313 | x: 0,
|
1314 | y: -1
|
1315 | }, {
|
1316 | x: 1,
|
1317 | y: -1
|
1318 | }, {
|
1319 | x: -4,
|
1320 | y: 0
|
1321 | }, {
|
1322 | x: -3,
|
1323 | y: 0
|
1324 | }, {
|
1325 | x: -2,
|
1326 | y: 0
|
1327 | }, {
|
1328 | x: -1,
|
1329 | y: 0
|
1330 | }]];
|
1331 | const RefinementTemplates = [{
|
1332 | coding: [{
|
1333 | x: 0,
|
1334 | y: -1
|
1335 | }, {
|
1336 | x: 1,
|
1337 | y: -1
|
1338 | }, {
|
1339 | x: -1,
|
1340 | y: 0
|
1341 | }],
|
1342 | reference: [{
|
1343 | x: 0,
|
1344 | y: -1
|
1345 | }, {
|
1346 | x: 1,
|
1347 | y: -1
|
1348 | }, {
|
1349 | x: -1,
|
1350 | y: 0
|
1351 | }, {
|
1352 | x: 0,
|
1353 | y: 0
|
1354 | }, {
|
1355 | x: 1,
|
1356 | y: 0
|
1357 | }, {
|
1358 | x: -1,
|
1359 | y: 1
|
1360 | }, {
|
1361 | x: 0,
|
1362 | y: 1
|
1363 | }, {
|
1364 | x: 1,
|
1365 | y: 1
|
1366 | }]
|
1367 | }, {
|
1368 | coding: [{
|
1369 | x: -1,
|
1370 | y: -1
|
1371 | }, {
|
1372 | x: 0,
|
1373 | y: -1
|
1374 | }, {
|
1375 | x: 1,
|
1376 | y: -1
|
1377 | }, {
|
1378 | x: -1,
|
1379 | y: 0
|
1380 | }],
|
1381 | reference: [{
|
1382 | x: 0,
|
1383 | y: -1
|
1384 | }, {
|
1385 | x: -1,
|
1386 | y: 0
|
1387 | }, {
|
1388 | x: 0,
|
1389 | y: 0
|
1390 | }, {
|
1391 | x: 1,
|
1392 | y: 0
|
1393 | }, {
|
1394 | x: 0,
|
1395 | y: 1
|
1396 | }, {
|
1397 | x: 1,
|
1398 | y: 1
|
1399 | }]
|
1400 | }];
|
1401 | const ReusedContexts = [0x9b25, 0x0795, 0x00e5, 0x0195];
|
1402 | const RefinementReusedContexts = [0x0020, 0x0008];
|
1403 |
|
1404 | function decodeBitmapTemplate0(width, height, decodingContext) {
|
1405 | const decoder = decodingContext.decoder;
|
1406 | const contexts = decodingContext.contextCache.getContexts("GB");
|
1407 | const bitmap = [];
|
1408 | let contextLabel, i, j, pixel, row, row1, row2;
|
1409 | const OLD_PIXEL_MASK = 0x7bf7;
|
1410 |
|
1411 | for (i = 0; i < height; i++) {
|
1412 | row = bitmap[i] = new Uint8Array(width);
|
1413 | row1 = i < 1 ? row : bitmap[i - 1];
|
1414 | row2 = i < 2 ? row : bitmap[i - 2];
|
1415 | contextLabel = row2[0] << 13 | row2[1] << 12 | row2[2] << 11 | row1[0] << 7 | row1[1] << 6 | row1[2] << 5 | row1[3] << 4;
|
1416 |
|
1417 | for (j = 0; j < width; j++) {
|
1418 | row[j] = pixel = decoder.readBit(contexts, contextLabel);
|
1419 | contextLabel = (contextLabel & OLD_PIXEL_MASK) << 1 | (j + 3 < width ? row2[j + 3] << 11 : 0) | (j + 4 < width ? row1[j + 4] << 4 : 0) | pixel;
|
1420 | }
|
1421 | }
|
1422 |
|
1423 | return bitmap;
|
1424 | }
|
1425 |
|
1426 | function decodeBitmap(mmr, width, height, templateIndex, prediction, skip, at, decodingContext) {
|
1427 | if (mmr) {
|
1428 | const input = new Reader(decodingContext.data, decodingContext.start, decodingContext.end);
|
1429 | return decodeMMRBitmap(input, width, height, false);
|
1430 | }
|
1431 |
|
1432 | 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) {
|
1433 | return decodeBitmapTemplate0(width, height, decodingContext);
|
1434 | }
|
1435 |
|
1436 | const useskip = !!skip;
|
1437 | const template = CodingTemplates[templateIndex].concat(at);
|
1438 | template.sort(function (a, b) {
|
1439 | return a.y - b.y || a.x - b.x;
|
1440 | });
|
1441 | const templateLength = template.length;
|
1442 | const templateX = new Int8Array(templateLength);
|
1443 | const templateY = new Int8Array(templateLength);
|
1444 | const changingTemplateEntries = [];
|
1445 | let reuseMask = 0,
|
1446 | minX = 0,
|
1447 | maxX = 0,
|
1448 | minY = 0;
|
1449 | let c, k;
|
1450 |
|
1451 | for (k = 0; k < templateLength; k++) {
|
1452 | templateX[k] = template[k].x;
|
1453 | templateY[k] = template[k].y;
|
1454 | minX = Math.min(minX, template[k].x);
|
1455 | maxX = Math.max(maxX, template[k].x);
|
1456 | minY = Math.min(minY, template[k].y);
|
1457 |
|
1458 | if (k < templateLength - 1 && template[k].y === template[k + 1].y && template[k].x === template[k + 1].x - 1) {
|
1459 | reuseMask |= 1 << templateLength - 1 - k;
|
1460 | } else {
|
1461 | changingTemplateEntries.push(k);
|
1462 | }
|
1463 | }
|
1464 |
|
1465 | const changingEntriesLength = changingTemplateEntries.length;
|
1466 | const changingTemplateX = new Int8Array(changingEntriesLength);
|
1467 | const changingTemplateY = new Int8Array(changingEntriesLength);
|
1468 | const changingTemplateBit = new Uint16Array(changingEntriesLength);
|
1469 |
|
1470 | for (c = 0; c < changingEntriesLength; c++) {
|
1471 | k = changingTemplateEntries[c];
|
1472 | changingTemplateX[c] = template[k].x;
|
1473 | changingTemplateY[c] = template[k].y;
|
1474 | changingTemplateBit[c] = 1 << templateLength - 1 - k;
|
1475 | }
|
1476 |
|
1477 | const sbb_left = -minX;
|
1478 | const sbb_top = -minY;
|
1479 | const sbb_right = width - maxX;
|
1480 | const pseudoPixelContext = ReusedContexts[templateIndex];
|
1481 | let row = new Uint8Array(width);
|
1482 | const bitmap = [];
|
1483 | const decoder = decodingContext.decoder;
|
1484 | const contexts = decodingContext.contextCache.getContexts("GB");
|
1485 | let ltp = 0,
|
1486 | j,
|
1487 | i0,
|
1488 | j0,
|
1489 | contextLabel = 0,
|
1490 | bit,
|
1491 | shift;
|
1492 |
|
1493 | for (let i = 0; i < height; i++) {
|
1494 | if (prediction) {
|
1495 | const sltp = decoder.readBit(contexts, pseudoPixelContext);
|
1496 | ltp ^= sltp;
|
1497 |
|
1498 | if (ltp) {
|
1499 | bitmap.push(row);
|
1500 | continue;
|
1501 | }
|
1502 | }
|
1503 |
|
1504 | row = new Uint8Array(row);
|
1505 | bitmap.push(row);
|
1506 |
|
1507 | for (j = 0; j < width; j++) {
|
1508 | if (useskip && skip[i][j]) {
|
1509 | row[j] = 0;
|
1510 | continue;
|
1511 | }
|
1512 |
|
1513 | if (j >= sbb_left && j < sbb_right && i >= sbb_top) {
|
1514 | contextLabel = contextLabel << 1 & reuseMask;
|
1515 |
|
1516 | for (k = 0; k < changingEntriesLength; k++) {
|
1517 | i0 = i + changingTemplateY[k];
|
1518 | j0 = j + changingTemplateX[k];
|
1519 | bit = bitmap[i0][j0];
|
1520 |
|
1521 | if (bit) {
|
1522 | bit = changingTemplateBit[k];
|
1523 | contextLabel |= bit;
|
1524 | }
|
1525 | }
|
1526 | } else {
|
1527 | contextLabel = 0;
|
1528 | shift = templateLength - 1;
|
1529 |
|
1530 | for (k = 0; k < templateLength; k++, shift--) {
|
1531 | j0 = j + templateX[k];
|
1532 |
|
1533 | if (j0 >= 0 && j0 < width) {
|
1534 | i0 = i + templateY[k];
|
1535 |
|
1536 | if (i0 >= 0) {
|
1537 | bit = bitmap[i0][j0];
|
1538 |
|
1539 | if (bit) {
|
1540 | contextLabel |= bit << shift;
|
1541 | }
|
1542 | }
|
1543 | }
|
1544 | }
|
1545 | }
|
1546 |
|
1547 | const pixel = decoder.readBit(contexts, contextLabel);
|
1548 | row[j] = pixel;
|
1549 | }
|
1550 | }
|
1551 |
|
1552 | return bitmap;
|
1553 | }
|
1554 |
|
1555 | function decodeRefinement(width, height, templateIndex, referenceBitmap, offsetX, offsetY, prediction, at, decodingContext) {
|
1556 | let codingTemplate = RefinementTemplates[templateIndex].coding;
|
1557 |
|
1558 | if (templateIndex === 0) {
|
1559 | codingTemplate = codingTemplate.concat([at[0]]);
|
1560 | }
|
1561 |
|
1562 | const codingTemplateLength = codingTemplate.length;
|
1563 | const codingTemplateX = new Int32Array(codingTemplateLength);
|
1564 | const codingTemplateY = new Int32Array(codingTemplateLength);
|
1565 | let k;
|
1566 |
|
1567 | for (k = 0; k < codingTemplateLength; k++) {
|
1568 | codingTemplateX[k] = codingTemplate[k].x;
|
1569 | codingTemplateY[k] = codingTemplate[k].y;
|
1570 | }
|
1571 |
|
1572 | let referenceTemplate = RefinementTemplates[templateIndex].reference;
|
1573 |
|
1574 | if (templateIndex === 0) {
|
1575 | referenceTemplate = referenceTemplate.concat([at[1]]);
|
1576 | }
|
1577 |
|
1578 | const referenceTemplateLength = referenceTemplate.length;
|
1579 | const referenceTemplateX = new Int32Array(referenceTemplateLength);
|
1580 | const referenceTemplateY = new Int32Array(referenceTemplateLength);
|
1581 |
|
1582 | for (k = 0; k < referenceTemplateLength; k++) {
|
1583 | referenceTemplateX[k] = referenceTemplate[k].x;
|
1584 | referenceTemplateY[k] = referenceTemplate[k].y;
|
1585 | }
|
1586 |
|
1587 | const referenceWidth = referenceBitmap[0].length;
|
1588 | const referenceHeight = referenceBitmap.length;
|
1589 | const pseudoPixelContext = RefinementReusedContexts[templateIndex];
|
1590 | const bitmap = [];
|
1591 | const decoder = decodingContext.decoder;
|
1592 | const contexts = decodingContext.contextCache.getContexts("GR");
|
1593 | let ltp = 0;
|
1594 |
|
1595 | for (let i = 0; i < height; i++) {
|
1596 | if (prediction) {
|
1597 | const sltp = decoder.readBit(contexts, pseudoPixelContext);
|
1598 | ltp ^= sltp;
|
1599 |
|
1600 | if (ltp) {
|
1601 | throw new Jbig2Error("prediction is not supported");
|
1602 | }
|
1603 | }
|
1604 |
|
1605 | const row = new Uint8Array(width);
|
1606 | bitmap.push(row);
|
1607 |
|
1608 | for (let j = 0; j < width; j++) {
|
1609 | let i0, j0;
|
1610 | let contextLabel = 0;
|
1611 |
|
1612 | for (k = 0; k < codingTemplateLength; k++) {
|
1613 | i0 = i + codingTemplateY[k];
|
1614 | j0 = j + codingTemplateX[k];
|
1615 |
|
1616 | if (i0 < 0 || j0 < 0 || j0 >= width) {
|
1617 | contextLabel <<= 1;
|
1618 | } else {
|
1619 | contextLabel = contextLabel << 1 | bitmap[i0][j0];
|
1620 | }
|
1621 | }
|
1622 |
|
1623 | for (k = 0; k < referenceTemplateLength; k++) {
|
1624 | i0 = i + referenceTemplateY[k] - offsetY;
|
1625 | j0 = j + referenceTemplateX[k] - offsetX;
|
1626 |
|
1627 | if (i0 < 0 || i0 >= referenceHeight || j0 < 0 || j0 >= referenceWidth) {
|
1628 | contextLabel <<= 1;
|
1629 | } else {
|
1630 | contextLabel = contextLabel << 1 | referenceBitmap[i0][j0];
|
1631 | }
|
1632 | }
|
1633 |
|
1634 | const pixel = decoder.readBit(contexts, contextLabel);
|
1635 | row[j] = pixel;
|
1636 | }
|
1637 | }
|
1638 |
|
1639 | return bitmap;
|
1640 | }
|
1641 |
|
1642 | function decodeSymbolDictionary(huffman, refinement, symbols, numberOfNewSymbols, numberOfExportedSymbols, huffmanTables, templateIndex, at, refinementTemplateIndex, refinementAt, decodingContext, huffmanInput) {
|
1643 | if (huffman && refinement) {
|
1644 | throw new Jbig2Error("symbol refinement with Huffman is not supported");
|
1645 | }
|
1646 |
|
1647 | const newSymbols = [];
|
1648 | let currentHeight = 0;
|
1649 | let symbolCodeLength = (0, _core_utils.log2)(symbols.length + numberOfNewSymbols);
|
1650 | const decoder = decodingContext.decoder;
|
1651 | const contextCache = decodingContext.contextCache;
|
1652 | let tableB1, symbolWidths;
|
1653 |
|
1654 | if (huffman) {
|
1655 | tableB1 = getStandardTable(1);
|
1656 | symbolWidths = [];
|
1657 | symbolCodeLength = Math.max(symbolCodeLength, 1);
|
1658 | }
|
1659 |
|
1660 | while (newSymbols.length < numberOfNewSymbols) {
|
1661 | const deltaHeight = huffman ? huffmanTables.tableDeltaHeight.decode(huffmanInput) : decodeInteger(contextCache, "IADH", decoder);
|
1662 | currentHeight += deltaHeight;
|
1663 | let currentWidth = 0,
|
1664 | totalWidth = 0;
|
1665 | const firstSymbol = huffman ? symbolWidths.length : 0;
|
1666 |
|
1667 | while (true) {
|
1668 | const deltaWidth = huffman ? huffmanTables.tableDeltaWidth.decode(huffmanInput) : decodeInteger(contextCache, "IADW", decoder);
|
1669 |
|
1670 | if (deltaWidth === null) {
|
1671 | break;
|
1672 | }
|
1673 |
|
1674 | currentWidth += deltaWidth;
|
1675 | totalWidth += currentWidth;
|
1676 | let bitmap;
|
1677 |
|
1678 | if (refinement) {
|
1679 | const numberOfInstances = decodeInteger(contextCache, "IAAI", decoder);
|
1680 |
|
1681 | if (numberOfInstances > 1) {
|
1682 | bitmap = decodeTextRegion(huffman, refinement, currentWidth, currentHeight, 0, numberOfInstances, 1, symbols.concat(newSymbols), symbolCodeLength, 0, 0, 1, 0, huffmanTables, refinementTemplateIndex, refinementAt, decodingContext, 0, huffmanInput);
|
1683 | } else {
|
1684 | const symbolId = decodeIAID(contextCache, decoder, symbolCodeLength);
|
1685 | const rdx = decodeInteger(contextCache, "IARDX", decoder);
|
1686 | const rdy = decodeInteger(contextCache, "IARDY", decoder);
|
1687 | const symbol = symbolId < symbols.length ? symbols[symbolId] : newSymbols[symbolId - symbols.length];
|
1688 | bitmap = decodeRefinement(currentWidth, currentHeight, refinementTemplateIndex, symbol, rdx, rdy, false, refinementAt, decodingContext);
|
1689 | }
|
1690 |
|
1691 | newSymbols.push(bitmap);
|
1692 | } else if (huffman) {
|
1693 | symbolWidths.push(currentWidth);
|
1694 | } else {
|
1695 | bitmap = decodeBitmap(false, currentWidth, currentHeight, templateIndex, false, null, at, decodingContext);
|
1696 | newSymbols.push(bitmap);
|
1697 | }
|
1698 | }
|
1699 |
|
1700 | if (huffman && !refinement) {
|
1701 | const bitmapSize = huffmanTables.tableBitmapSize.decode(huffmanInput);
|
1702 | huffmanInput.byteAlign();
|
1703 | let collectiveBitmap;
|
1704 |
|
1705 | if (bitmapSize === 0) {
|
1706 | collectiveBitmap = readUncompressedBitmap(huffmanInput, totalWidth, currentHeight);
|
1707 | } else {
|
1708 | const originalEnd = huffmanInput.end;
|
1709 | const bitmapEnd = huffmanInput.position + bitmapSize;
|
1710 | huffmanInput.end = bitmapEnd;
|
1711 | collectiveBitmap = decodeMMRBitmap(huffmanInput, totalWidth, currentHeight, false);
|
1712 | huffmanInput.end = originalEnd;
|
1713 | huffmanInput.position = bitmapEnd;
|
1714 | }
|
1715 |
|
1716 | const numberOfSymbolsDecoded = symbolWidths.length;
|
1717 |
|
1718 | if (firstSymbol === numberOfSymbolsDecoded - 1) {
|
1719 | newSymbols.push(collectiveBitmap);
|
1720 | } else {
|
1721 | let i,
|
1722 | y,
|
1723 | xMin = 0,
|
1724 | xMax,
|
1725 | bitmapWidth,
|
1726 | symbolBitmap;
|
1727 |
|
1728 | for (i = firstSymbol; i < numberOfSymbolsDecoded; i++) {
|
1729 | bitmapWidth = symbolWidths[i];
|
1730 | xMax = xMin + bitmapWidth;
|
1731 | symbolBitmap = [];
|
1732 |
|
1733 | for (y = 0; y < currentHeight; y++) {
|
1734 | symbolBitmap.push(collectiveBitmap[y].subarray(xMin, xMax));
|
1735 | }
|
1736 |
|
1737 | newSymbols.push(symbolBitmap);
|
1738 | xMin = xMax;
|
1739 | }
|
1740 | }
|
1741 | }
|
1742 | }
|
1743 |
|
1744 | const exportedSymbols = [],
|
1745 | flags = [];
|
1746 | let currentFlag = false,
|
1747 | i,
|
1748 | ii;
|
1749 | const totalSymbolsLength = symbols.length + numberOfNewSymbols;
|
1750 |
|
1751 | while (flags.length < totalSymbolsLength) {
|
1752 | let runLength = huffman ? tableB1.decode(huffmanInput) : decodeInteger(contextCache, "IAEX", decoder);
|
1753 |
|
1754 | while (runLength--) {
|
1755 | flags.push(currentFlag);
|
1756 | }
|
1757 |
|
1758 | currentFlag = !currentFlag;
|
1759 | }
|
1760 |
|
1761 | for (i = 0, ii = symbols.length; i < ii; i++) {
|
1762 | if (flags[i]) {
|
1763 | exportedSymbols.push(symbols[i]);
|
1764 | }
|
1765 | }
|
1766 |
|
1767 | for (let j = 0; j < numberOfNewSymbols; i++, j++) {
|
1768 | if (flags[i]) {
|
1769 | exportedSymbols.push(newSymbols[j]);
|
1770 | }
|
1771 | }
|
1772 |
|
1773 | return exportedSymbols;
|
1774 | }
|
1775 |
|
1776 | function decodeTextRegion(huffman, refinement, width, height, defaultPixelValue, numberOfSymbolInstances, stripSize, inputSymbols, symbolCodeLength, transposed, dsOffset, referenceCorner, combinationOperator, huffmanTables, refinementTemplateIndex, refinementAt, decodingContext, logStripSize, huffmanInput) {
|
1777 | if (huffman && refinement) {
|
1778 | throw new Jbig2Error("refinement with Huffman is not supported");
|
1779 | }
|
1780 |
|
1781 | const bitmap = [];
|
1782 | let i, row;
|
1783 |
|
1784 | for (i = 0; i < height; i++) {
|
1785 | row = new Uint8Array(width);
|
1786 |
|
1787 | if (defaultPixelValue) {
|
1788 | for (let j = 0; j < width; j++) {
|
1789 | row[j] = defaultPixelValue;
|
1790 | }
|
1791 | }
|
1792 |
|
1793 | bitmap.push(row);
|
1794 | }
|
1795 |
|
1796 | const decoder = decodingContext.decoder;
|
1797 | const contextCache = decodingContext.contextCache;
|
1798 | let stripT = huffman ? -huffmanTables.tableDeltaT.decode(huffmanInput) : -decodeInteger(contextCache, "IADT", decoder);
|
1799 | let firstS = 0;
|
1800 | i = 0;
|
1801 |
|
1802 | while (i < numberOfSymbolInstances) {
|
1803 | const deltaT = huffman ? huffmanTables.tableDeltaT.decode(huffmanInput) : decodeInteger(contextCache, "IADT", decoder);
|
1804 | stripT += deltaT;
|
1805 | const deltaFirstS = huffman ? huffmanTables.tableFirstS.decode(huffmanInput) : decodeInteger(contextCache, "IAFS", decoder);
|
1806 | firstS += deltaFirstS;
|
1807 | let currentS = firstS;
|
1808 |
|
1809 | do {
|
1810 | let currentT = 0;
|
1811 |
|
1812 | if (stripSize > 1) {
|
1813 | currentT = huffman ? huffmanInput.readBits(logStripSize) : decodeInteger(contextCache, "IAIT", decoder);
|
1814 | }
|
1815 |
|
1816 | const t = stripSize * stripT + currentT;
|
1817 | const symbolId = huffman ? huffmanTables.symbolIDTable.decode(huffmanInput) : decodeIAID(contextCache, decoder, symbolCodeLength);
|
1818 | const applyRefinement = refinement && (huffman ? huffmanInput.readBit() : decodeInteger(contextCache, "IARI", decoder));
|
1819 | let symbolBitmap = inputSymbols[symbolId];
|
1820 | let symbolWidth = symbolBitmap[0].length;
|
1821 | let symbolHeight = symbolBitmap.length;
|
1822 |
|
1823 | if (applyRefinement) {
|
1824 | const rdw = decodeInteger(contextCache, "IARDW", decoder);
|
1825 | const rdh = decodeInteger(contextCache, "IARDH", decoder);
|
1826 | const rdx = decodeInteger(contextCache, "IARDX", decoder);
|
1827 | const rdy = decodeInteger(contextCache, "IARDY", decoder);
|
1828 | symbolWidth += rdw;
|
1829 | symbolHeight += rdh;
|
1830 | symbolBitmap = decodeRefinement(symbolWidth, symbolHeight, refinementTemplateIndex, symbolBitmap, (rdw >> 1) + rdx, (rdh >> 1) + rdy, false, refinementAt, decodingContext);
|
1831 | }
|
1832 |
|
1833 | const offsetT = t - (referenceCorner & 1 ? 0 : symbolHeight - 1);
|
1834 | const offsetS = currentS - (referenceCorner & 2 ? symbolWidth - 1 : 0);
|
1835 | let s2, t2, symbolRow;
|
1836 |
|
1837 | if (transposed) {
|
1838 | for (s2 = 0; s2 < symbolHeight; s2++) {
|
1839 | row = bitmap[offsetS + s2];
|
1840 |
|
1841 | if (!row) {
|
1842 | continue;
|
1843 | }
|
1844 |
|
1845 | symbolRow = symbolBitmap[s2];
|
1846 | const maxWidth = Math.min(width - offsetT, symbolWidth);
|
1847 |
|
1848 | switch (combinationOperator) {
|
1849 | case 0:
|
1850 | for (t2 = 0; t2 < maxWidth; t2++) {
|
1851 | row[offsetT + t2] |= symbolRow[t2];
|
1852 | }
|
1853 |
|
1854 | break;
|
1855 |
|
1856 | case 2:
|
1857 | for (t2 = 0; t2 < maxWidth; t2++) {
|
1858 | row[offsetT + t2] ^= symbolRow[t2];
|
1859 | }
|
1860 |
|
1861 | break;
|
1862 |
|
1863 | default:
|
1864 | throw new Jbig2Error(`operator ${combinationOperator} is not supported`);
|
1865 | }
|
1866 | }
|
1867 |
|
1868 | currentS += symbolHeight - 1;
|
1869 | } else {
|
1870 | for (t2 = 0; t2 < symbolHeight; t2++) {
|
1871 | row = bitmap[offsetT + t2];
|
1872 |
|
1873 | if (!row) {
|
1874 | continue;
|
1875 | }
|
1876 |
|
1877 | symbolRow = symbolBitmap[t2];
|
1878 |
|
1879 | switch (combinationOperator) {
|
1880 | case 0:
|
1881 | for (s2 = 0; s2 < symbolWidth; s2++) {
|
1882 | row[offsetS + s2] |= symbolRow[s2];
|
1883 | }
|
1884 |
|
1885 | break;
|
1886 |
|
1887 | case 2:
|
1888 | for (s2 = 0; s2 < symbolWidth; s2++) {
|
1889 | row[offsetS + s2] ^= symbolRow[s2];
|
1890 | }
|
1891 |
|
1892 | break;
|
1893 |
|
1894 | default:
|
1895 | throw new Jbig2Error(`operator ${combinationOperator} is not supported`);
|
1896 | }
|
1897 | }
|
1898 |
|
1899 | currentS += symbolWidth - 1;
|
1900 | }
|
1901 |
|
1902 | i++;
|
1903 | const deltaS = huffman ? huffmanTables.tableDeltaS.decode(huffmanInput) : decodeInteger(contextCache, "IADS", decoder);
|
1904 |
|
1905 | if (deltaS === null) {
|
1906 | break;
|
1907 | }
|
1908 |
|
1909 | currentS += deltaS + dsOffset;
|
1910 | } while (true);
|
1911 | }
|
1912 |
|
1913 | return bitmap;
|
1914 | }
|
1915 |
|
1916 | function decodePatternDictionary(mmr, patternWidth, patternHeight, maxPatternIndex, template, decodingContext) {
|
1917 | const at = [];
|
1918 |
|
1919 | if (!mmr) {
|
1920 | at.push({
|
1921 | x: -patternWidth,
|
1922 | y: 0
|
1923 | });
|
1924 |
|
1925 | if (template === 0) {
|
1926 | at.push({
|
1927 | x: -3,
|
1928 | y: -1
|
1929 | }, {
|
1930 | x: 2,
|
1931 | y: -2
|
1932 | }, {
|
1933 | x: -2,
|
1934 | y: -2
|
1935 | });
|
1936 | }
|
1937 | }
|
1938 |
|
1939 | const collectiveWidth = (maxPatternIndex + 1) * patternWidth;
|
1940 | const collectiveBitmap = decodeBitmap(mmr, collectiveWidth, patternHeight, template, false, null, at, decodingContext);
|
1941 | const patterns = [];
|
1942 |
|
1943 | for (let i = 0; i <= maxPatternIndex; i++) {
|
1944 | const patternBitmap = [];
|
1945 | const xMin = patternWidth * i;
|
1946 | const xMax = xMin + patternWidth;
|
1947 |
|
1948 | for (let y = 0; y < patternHeight; y++) {
|
1949 | patternBitmap.push(collectiveBitmap[y].subarray(xMin, xMax));
|
1950 | }
|
1951 |
|
1952 | patterns.push(patternBitmap);
|
1953 | }
|
1954 |
|
1955 | return patterns;
|
1956 | }
|
1957 |
|
1958 | function decodeHalftoneRegion(mmr, patterns, template, regionWidth, regionHeight, defaultPixelValue, enableSkip, combinationOperator, gridWidth, gridHeight, gridOffsetX, gridOffsetY, gridVectorX, gridVectorY, decodingContext) {
|
1959 | const skip = null;
|
1960 |
|
1961 | if (enableSkip) {
|
1962 | throw new Jbig2Error("skip is not supported");
|
1963 | }
|
1964 |
|
1965 | if (combinationOperator !== 0) {
|
1966 | throw new Jbig2Error(`operator "${combinationOperator}" is not supported in halftone region`);
|
1967 | }
|
1968 |
|
1969 | const regionBitmap = [];
|
1970 | let i, j, row;
|
1971 |
|
1972 | for (i = 0; i < regionHeight; i++) {
|
1973 | row = new Uint8Array(regionWidth);
|
1974 |
|
1975 | if (defaultPixelValue) {
|
1976 | for (j = 0; j < regionWidth; j++) {
|
1977 | row[j] = defaultPixelValue;
|
1978 | }
|
1979 | }
|
1980 |
|
1981 | regionBitmap.push(row);
|
1982 | }
|
1983 |
|
1984 | const numberOfPatterns = patterns.length;
|
1985 | const pattern0 = patterns[0];
|
1986 | const patternWidth = pattern0[0].length,
|
1987 | patternHeight = pattern0.length;
|
1988 | const bitsPerValue = (0, _core_utils.log2)(numberOfPatterns);
|
1989 | const at = [];
|
1990 |
|
1991 | if (!mmr) {
|
1992 | at.push({
|
1993 | x: template <= 1 ? 3 : 2,
|
1994 | y: -1
|
1995 | });
|
1996 |
|
1997 | if (template === 0) {
|
1998 | at.push({
|
1999 | x: -3,
|
2000 | y: -1
|
2001 | }, {
|
2002 | x: 2,
|
2003 | y: -2
|
2004 | }, {
|
2005 | x: -2,
|
2006 | y: -2
|
2007 | });
|
2008 | }
|
2009 | }
|
2010 |
|
2011 | const grayScaleBitPlanes = [];
|
2012 | let mmrInput, bitmap;
|
2013 |
|
2014 | if (mmr) {
|
2015 | mmrInput = new Reader(decodingContext.data, decodingContext.start, decodingContext.end);
|
2016 | }
|
2017 |
|
2018 | for (i = bitsPerValue - 1; i >= 0; i--) {
|
2019 | if (mmr) {
|
2020 | bitmap = decodeMMRBitmap(mmrInput, gridWidth, gridHeight, true);
|
2021 | } else {
|
2022 | bitmap = decodeBitmap(false, gridWidth, gridHeight, template, false, skip, at, decodingContext);
|
2023 | }
|
2024 |
|
2025 | grayScaleBitPlanes[i] = bitmap;
|
2026 | }
|
2027 |
|
2028 | let mg, ng, bit, patternIndex, patternBitmap, x, y, patternRow, regionRow;
|
2029 |
|
2030 | for (mg = 0; mg < gridHeight; mg++) {
|
2031 | for (ng = 0; ng < gridWidth; ng++) {
|
2032 | bit = 0;
|
2033 | patternIndex = 0;
|
2034 |
|
2035 | for (j = bitsPerValue - 1; j >= 0; j--) {
|
2036 | bit ^= grayScaleBitPlanes[j][mg][ng];
|
2037 | patternIndex |= bit << j;
|
2038 | }
|
2039 |
|
2040 | patternBitmap = patterns[patternIndex];
|
2041 | x = gridOffsetX + mg * gridVectorY + ng * gridVectorX >> 8;
|
2042 | y = gridOffsetY + mg * gridVectorX - ng * gridVectorY >> 8;
|
2043 |
|
2044 | if (x >= 0 && x + patternWidth <= regionWidth && y >= 0 && y + patternHeight <= regionHeight) {
|
2045 | for (i = 0; i < patternHeight; i++) {
|
2046 | regionRow = regionBitmap[y + i];
|
2047 | patternRow = patternBitmap[i];
|
2048 |
|
2049 | for (j = 0; j < patternWidth; j++) {
|
2050 | regionRow[x + j] |= patternRow[j];
|
2051 | }
|
2052 | }
|
2053 | } else {
|
2054 | let regionX, regionY;
|
2055 |
|
2056 | for (i = 0; i < patternHeight; i++) {
|
2057 | regionY = y + i;
|
2058 |
|
2059 | if (regionY < 0 || regionY >= regionHeight) {
|
2060 | continue;
|
2061 | }
|
2062 |
|
2063 | regionRow = regionBitmap[regionY];
|
2064 | patternRow = patternBitmap[i];
|
2065 |
|
2066 | for (j = 0; j < patternWidth; j++) {
|
2067 | regionX = x + j;
|
2068 |
|
2069 | if (regionX >= 0 && regionX < regionWidth) {
|
2070 | regionRow[regionX] |= patternRow[j];
|
2071 | }
|
2072 | }
|
2073 | }
|
2074 | }
|
2075 | }
|
2076 | }
|
2077 |
|
2078 | return regionBitmap;
|
2079 | }
|
2080 |
|
2081 | function readSegmentHeader(data, start) {
|
2082 | const segmentHeader = {};
|
2083 | segmentHeader.number = (0, _core_utils.readUint32)(data, start);
|
2084 | const flags = data[start + 4];
|
2085 | const segmentType = flags & 0x3f;
|
2086 |
|
2087 | if (!SegmentTypes[segmentType]) {
|
2088 | throw new Jbig2Error("invalid segment type: " + segmentType);
|
2089 | }
|
2090 |
|
2091 | segmentHeader.type = segmentType;
|
2092 | segmentHeader.typeName = SegmentTypes[segmentType];
|
2093 | segmentHeader.deferredNonRetain = !!(flags & 0x80);
|
2094 | const pageAssociationFieldSize = !!(flags & 0x40);
|
2095 | const referredFlags = data[start + 5];
|
2096 | let referredToCount = referredFlags >> 5 & 7;
|
2097 | const retainBits = [referredFlags & 31];
|
2098 | let position = start + 6;
|
2099 |
|
2100 | if (referredFlags === 7) {
|
2101 | referredToCount = (0, _core_utils.readUint32)(data, position - 1) & 0x1fffffff;
|
2102 | position += 3;
|
2103 | let bytes = referredToCount + 7 >> 3;
|
2104 | retainBits[0] = data[position++];
|
2105 |
|
2106 | while (--bytes > 0) {
|
2107 | retainBits.push(data[position++]);
|
2108 | }
|
2109 | } else if (referredFlags === 5 || referredFlags === 6) {
|
2110 | throw new Jbig2Error("invalid referred-to flags");
|
2111 | }
|
2112 |
|
2113 | segmentHeader.retainBits = retainBits;
|
2114 | let referredToSegmentNumberSize = 4;
|
2115 |
|
2116 | if (segmentHeader.number <= 256) {
|
2117 | referredToSegmentNumberSize = 1;
|
2118 | } else if (segmentHeader.number <= 65536) {
|
2119 | referredToSegmentNumberSize = 2;
|
2120 | }
|
2121 |
|
2122 | const referredTo = [];
|
2123 | let i, ii;
|
2124 |
|
2125 | for (i = 0; i < referredToCount; i++) {
|
2126 | let number;
|
2127 |
|
2128 | if (referredToSegmentNumberSize === 1) {
|
2129 | number = data[position];
|
2130 | } else if (referredToSegmentNumberSize === 2) {
|
2131 | number = (0, _core_utils.readUint16)(data, position);
|
2132 | } else {
|
2133 | number = (0, _core_utils.readUint32)(data, position);
|
2134 | }
|
2135 |
|
2136 | referredTo.push(number);
|
2137 | position += referredToSegmentNumberSize;
|
2138 | }
|
2139 |
|
2140 | segmentHeader.referredTo = referredTo;
|
2141 |
|
2142 | if (!pageAssociationFieldSize) {
|
2143 | segmentHeader.pageAssociation = data[position++];
|
2144 | } else {
|
2145 | segmentHeader.pageAssociation = (0, _core_utils.readUint32)(data, position);
|
2146 | position += 4;
|
2147 | }
|
2148 |
|
2149 | segmentHeader.length = (0, _core_utils.readUint32)(data, position);
|
2150 | position += 4;
|
2151 |
|
2152 | if (segmentHeader.length === 0xffffffff) {
|
2153 | if (segmentType === 38) {
|
2154 | const genericRegionInfo = readRegionSegmentInformation(data, position);
|
2155 | const genericRegionSegmentFlags = data[position + RegionSegmentInformationFieldLength];
|
2156 | const genericRegionMmr = !!(genericRegionSegmentFlags & 1);
|
2157 | const searchPatternLength = 6;
|
2158 | const searchPattern = new Uint8Array(searchPatternLength);
|
2159 |
|
2160 | if (!genericRegionMmr) {
|
2161 | searchPattern[0] = 0xff;
|
2162 | searchPattern[1] = 0xac;
|
2163 | }
|
2164 |
|
2165 | searchPattern[2] = genericRegionInfo.height >>> 24 & 0xff;
|
2166 | searchPattern[3] = genericRegionInfo.height >> 16 & 0xff;
|
2167 | searchPattern[4] = genericRegionInfo.height >> 8 & 0xff;
|
2168 | searchPattern[5] = genericRegionInfo.height & 0xff;
|
2169 |
|
2170 | for (i = position, ii = data.length; i < ii; i++) {
|
2171 | let j = 0;
|
2172 |
|
2173 | while (j < searchPatternLength && searchPattern[j] === data[i + j]) {
|
2174 | j++;
|
2175 | }
|
2176 |
|
2177 | if (j === searchPatternLength) {
|
2178 | segmentHeader.length = i + searchPatternLength;
|
2179 | break;
|
2180 | }
|
2181 | }
|
2182 |
|
2183 | if (segmentHeader.length === 0xffffffff) {
|
2184 | throw new Jbig2Error("segment end was not found");
|
2185 | }
|
2186 | } else {
|
2187 | throw new Jbig2Error("invalid unknown segment length");
|
2188 | }
|
2189 | }
|
2190 |
|
2191 | segmentHeader.headerEnd = position;
|
2192 | return segmentHeader;
|
2193 | }
|
2194 |
|
2195 | function readSegments(header, data, start, end) {
|
2196 | const segments = [];
|
2197 | let position = start;
|
2198 |
|
2199 | while (position < end) {
|
2200 | const segmentHeader = readSegmentHeader(data, position);
|
2201 | position = segmentHeader.headerEnd;
|
2202 | const segment = {
|
2203 | header: segmentHeader,
|
2204 | data
|
2205 | };
|
2206 |
|
2207 | if (!header.randomAccess) {
|
2208 | segment.start = position;
|
2209 | position += segmentHeader.length;
|
2210 | segment.end = position;
|
2211 | }
|
2212 |
|
2213 | segments.push(segment);
|
2214 |
|
2215 | if (segmentHeader.type === 51) {
|
2216 | break;
|
2217 | }
|
2218 | }
|
2219 |
|
2220 | if (header.randomAccess) {
|
2221 | for (let i = 0, ii = segments.length; i < ii; i++) {
|
2222 | segments[i].start = position;
|
2223 | position += segments[i].header.length;
|
2224 | segments[i].end = position;
|
2225 | }
|
2226 | }
|
2227 |
|
2228 | return segments;
|
2229 | }
|
2230 |
|
2231 | function readRegionSegmentInformation(data, start) {
|
2232 | return {
|
2233 | width: (0, _core_utils.readUint32)(data, start),
|
2234 | height: (0, _core_utils.readUint32)(data, start + 4),
|
2235 | x: (0, _core_utils.readUint32)(data, start + 8),
|
2236 | y: (0, _core_utils.readUint32)(data, start + 12),
|
2237 | combinationOperator: data[start + 16] & 7
|
2238 | };
|
2239 | }
|
2240 |
|
2241 | const RegionSegmentInformationFieldLength = 17;
|
2242 |
|
2243 | function processSegment(segment, visitor) {
|
2244 | const header = segment.header;
|
2245 | const data = segment.data,
|
2246 | end = segment.end;
|
2247 | let position = segment.start;
|
2248 | let args, at, i, atLength;
|
2249 |
|
2250 | switch (header.type) {
|
2251 | case 0:
|
2252 | const dictionary = {};
|
2253 | const dictionaryFlags = (0, _core_utils.readUint16)(data, position);
|
2254 | dictionary.huffman = !!(dictionaryFlags & 1);
|
2255 | dictionary.refinement = !!(dictionaryFlags & 2);
|
2256 | dictionary.huffmanDHSelector = dictionaryFlags >> 2 & 3;
|
2257 | dictionary.huffmanDWSelector = dictionaryFlags >> 4 & 3;
|
2258 | dictionary.bitmapSizeSelector = dictionaryFlags >> 6 & 1;
|
2259 | dictionary.aggregationInstancesSelector = dictionaryFlags >> 7 & 1;
|
2260 | dictionary.bitmapCodingContextUsed = !!(dictionaryFlags & 256);
|
2261 | dictionary.bitmapCodingContextRetained = !!(dictionaryFlags & 512);
|
2262 | dictionary.template = dictionaryFlags >> 10 & 3;
|
2263 | dictionary.refinementTemplate = dictionaryFlags >> 12 & 1;
|
2264 | position += 2;
|
2265 |
|
2266 | if (!dictionary.huffman) {
|
2267 | atLength = dictionary.template === 0 ? 4 : 1;
|
2268 | at = [];
|
2269 |
|
2270 | for (i = 0; i < atLength; i++) {
|
2271 | at.push({
|
2272 | x: (0, _core_utils.readInt8)(data, position),
|
2273 | y: (0, _core_utils.readInt8)(data, position + 1)
|
2274 | });
|
2275 | position += 2;
|
2276 | }
|
2277 |
|
2278 | dictionary.at = at;
|
2279 | }
|
2280 |
|
2281 | if (dictionary.refinement && !dictionary.refinementTemplate) {
|
2282 | at = [];
|
2283 |
|
2284 | for (i = 0; i < 2; i++) {
|
2285 | at.push({
|
2286 | x: (0, _core_utils.readInt8)(data, position),
|
2287 | y: (0, _core_utils.readInt8)(data, position + 1)
|
2288 | });
|
2289 | position += 2;
|
2290 | }
|
2291 |
|
2292 | dictionary.refinementAt = at;
|
2293 | }
|
2294 |
|
2295 | dictionary.numberOfExportedSymbols = (0, _core_utils.readUint32)(data, position);
|
2296 | position += 4;
|
2297 | dictionary.numberOfNewSymbols = (0, _core_utils.readUint32)(data, position);
|
2298 | position += 4;
|
2299 | args = [dictionary, header.number, header.referredTo, data, position, end];
|
2300 | break;
|
2301 |
|
2302 | case 6:
|
2303 | case 7:
|
2304 | const textRegion = {};
|
2305 | textRegion.info = readRegionSegmentInformation(data, position);
|
2306 | position += RegionSegmentInformationFieldLength;
|
2307 | const textRegionSegmentFlags = (0, _core_utils.readUint16)(data, position);
|
2308 | position += 2;
|
2309 | textRegion.huffman = !!(textRegionSegmentFlags & 1);
|
2310 | textRegion.refinement = !!(textRegionSegmentFlags & 2);
|
2311 | textRegion.logStripSize = textRegionSegmentFlags >> 2 & 3;
|
2312 | textRegion.stripSize = 1 << textRegion.logStripSize;
|
2313 | textRegion.referenceCorner = textRegionSegmentFlags >> 4 & 3;
|
2314 | textRegion.transposed = !!(textRegionSegmentFlags & 64);
|
2315 | textRegion.combinationOperator = textRegionSegmentFlags >> 7 & 3;
|
2316 | textRegion.defaultPixelValue = textRegionSegmentFlags >> 9 & 1;
|
2317 | textRegion.dsOffset = textRegionSegmentFlags << 17 >> 27;
|
2318 | textRegion.refinementTemplate = textRegionSegmentFlags >> 15 & 1;
|
2319 |
|
2320 | if (textRegion.huffman) {
|
2321 | const textRegionHuffmanFlags = (0, _core_utils.readUint16)(data, position);
|
2322 | position += 2;
|
2323 | textRegion.huffmanFS = textRegionHuffmanFlags & 3;
|
2324 | textRegion.huffmanDS = textRegionHuffmanFlags >> 2 & 3;
|
2325 | textRegion.huffmanDT = textRegionHuffmanFlags >> 4 & 3;
|
2326 | textRegion.huffmanRefinementDW = textRegionHuffmanFlags >> 6 & 3;
|
2327 | textRegion.huffmanRefinementDH = textRegionHuffmanFlags >> 8 & 3;
|
2328 | textRegion.huffmanRefinementDX = textRegionHuffmanFlags >> 10 & 3;
|
2329 | textRegion.huffmanRefinementDY = textRegionHuffmanFlags >> 12 & 3;
|
2330 | textRegion.huffmanRefinementSizeSelector = !!(textRegionHuffmanFlags & 0x4000);
|
2331 | }
|
2332 |
|
2333 | if (textRegion.refinement && !textRegion.refinementTemplate) {
|
2334 | at = [];
|
2335 |
|
2336 | for (i = 0; i < 2; i++) {
|
2337 | at.push({
|
2338 | x: (0, _core_utils.readInt8)(data, position),
|
2339 | y: (0, _core_utils.readInt8)(data, position + 1)
|
2340 | });
|
2341 | position += 2;
|
2342 | }
|
2343 |
|
2344 | textRegion.refinementAt = at;
|
2345 | }
|
2346 |
|
2347 | textRegion.numberOfSymbolInstances = (0, _core_utils.readUint32)(data, position);
|
2348 | position += 4;
|
2349 | args = [textRegion, header.referredTo, data, position, end];
|
2350 | break;
|
2351 |
|
2352 | case 16:
|
2353 | const patternDictionary = {};
|
2354 | const patternDictionaryFlags = data[position++];
|
2355 | patternDictionary.mmr = !!(patternDictionaryFlags & 1);
|
2356 | patternDictionary.template = patternDictionaryFlags >> 1 & 3;
|
2357 | patternDictionary.patternWidth = data[position++];
|
2358 | patternDictionary.patternHeight = data[position++];
|
2359 | patternDictionary.maxPatternIndex = (0, _core_utils.readUint32)(data, position);
|
2360 | position += 4;
|
2361 | args = [patternDictionary, header.number, data, position, end];
|
2362 | break;
|
2363 |
|
2364 | case 22:
|
2365 | case 23:
|
2366 | const halftoneRegion = {};
|
2367 | halftoneRegion.info = readRegionSegmentInformation(data, position);
|
2368 | position += RegionSegmentInformationFieldLength;
|
2369 | const halftoneRegionFlags = data[position++];
|
2370 | halftoneRegion.mmr = !!(halftoneRegionFlags & 1);
|
2371 | halftoneRegion.template = halftoneRegionFlags >> 1 & 3;
|
2372 | halftoneRegion.enableSkip = !!(halftoneRegionFlags & 8);
|
2373 | halftoneRegion.combinationOperator = halftoneRegionFlags >> 4 & 7;
|
2374 | halftoneRegion.defaultPixelValue = halftoneRegionFlags >> 7 & 1;
|
2375 | halftoneRegion.gridWidth = (0, _core_utils.readUint32)(data, position);
|
2376 | position += 4;
|
2377 | halftoneRegion.gridHeight = (0, _core_utils.readUint32)(data, position);
|
2378 | position += 4;
|
2379 | halftoneRegion.gridOffsetX = (0, _core_utils.readUint32)(data, position) & 0xffffffff;
|
2380 | position += 4;
|
2381 | halftoneRegion.gridOffsetY = (0, _core_utils.readUint32)(data, position) & 0xffffffff;
|
2382 | position += 4;
|
2383 | halftoneRegion.gridVectorX = (0, _core_utils.readUint16)(data, position);
|
2384 | position += 2;
|
2385 | halftoneRegion.gridVectorY = (0, _core_utils.readUint16)(data, position);
|
2386 | position += 2;
|
2387 | args = [halftoneRegion, header.referredTo, data, position, end];
|
2388 | break;
|
2389 |
|
2390 | case 38:
|
2391 | case 39:
|
2392 | const genericRegion = {};
|
2393 | genericRegion.info = readRegionSegmentInformation(data, position);
|
2394 | position += RegionSegmentInformationFieldLength;
|
2395 | const genericRegionSegmentFlags = data[position++];
|
2396 | genericRegion.mmr = !!(genericRegionSegmentFlags & 1);
|
2397 | genericRegion.template = genericRegionSegmentFlags >> 1 & 3;
|
2398 | genericRegion.prediction = !!(genericRegionSegmentFlags & 8);
|
2399 |
|
2400 | if (!genericRegion.mmr) {
|
2401 | atLength = genericRegion.template === 0 ? 4 : 1;
|
2402 | at = [];
|
2403 |
|
2404 | for (i = 0; i < atLength; i++) {
|
2405 | at.push({
|
2406 | x: (0, _core_utils.readInt8)(data, position),
|
2407 | y: (0, _core_utils.readInt8)(data, position + 1)
|
2408 | });
|
2409 | position += 2;
|
2410 | }
|
2411 |
|
2412 | genericRegion.at = at;
|
2413 | }
|
2414 |
|
2415 | args = [genericRegion, data, position, end];
|
2416 | break;
|
2417 |
|
2418 | case 48:
|
2419 | const pageInfo = {
|
2420 | width: (0, _core_utils.readUint32)(data, position),
|
2421 | height: (0, _core_utils.readUint32)(data, position + 4),
|
2422 | resolutionX: (0, _core_utils.readUint32)(data, position + 8),
|
2423 | resolutionY: (0, _core_utils.readUint32)(data, position + 12)
|
2424 | };
|
2425 |
|
2426 | if (pageInfo.height === 0xffffffff) {
|
2427 | delete pageInfo.height;
|
2428 | }
|
2429 |
|
2430 | const pageSegmentFlags = data[position + 16];
|
2431 | (0, _core_utils.readUint16)(data, position + 17);
|
2432 | pageInfo.lossless = !!(pageSegmentFlags & 1);
|
2433 | pageInfo.refinement = !!(pageSegmentFlags & 2);
|
2434 | pageInfo.defaultPixelValue = pageSegmentFlags >> 2 & 1;
|
2435 | pageInfo.combinationOperator = pageSegmentFlags >> 3 & 3;
|
2436 | pageInfo.requiresBuffer = !!(pageSegmentFlags & 32);
|
2437 | pageInfo.combinationOperatorOverride = !!(pageSegmentFlags & 64);
|
2438 | args = [pageInfo];
|
2439 | break;
|
2440 |
|
2441 | case 49:
|
2442 | break;
|
2443 |
|
2444 | case 50:
|
2445 | break;
|
2446 |
|
2447 | case 51:
|
2448 | break;
|
2449 |
|
2450 | case 53:
|
2451 | args = [header.number, data, position, end];
|
2452 | break;
|
2453 |
|
2454 | case 62:
|
2455 | break;
|
2456 |
|
2457 | default:
|
2458 | throw new Jbig2Error(`segment type ${header.typeName}(${header.type}) is not implemented`);
|
2459 | }
|
2460 |
|
2461 | const callbackName = "on" + header.typeName;
|
2462 |
|
2463 | if (callbackName in visitor) {
|
2464 | visitor[callbackName].apply(visitor, args);
|
2465 | }
|
2466 | }
|
2467 |
|
2468 | function processSegments(segments, visitor) {
|
2469 | for (let i = 0, ii = segments.length; i < ii; i++) {
|
2470 | processSegment(segments[i], visitor);
|
2471 | }
|
2472 | }
|
2473 |
|
2474 | function parseJbig2Chunks(chunks) {
|
2475 | const visitor = new SimpleSegmentVisitor();
|
2476 |
|
2477 | for (let i = 0, ii = chunks.length; i < ii; i++) {
|
2478 | const chunk = chunks[i];
|
2479 | const segments = readSegments({}, chunk.data, chunk.start, chunk.end);
|
2480 | processSegments(segments, visitor);
|
2481 | }
|
2482 |
|
2483 | return visitor.buffer;
|
2484 | }
|
2485 |
|
2486 | function parseJbig2(data) {
|
2487 | const end = data.length;
|
2488 | let position = 0;
|
2489 |
|
2490 | 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) {
|
2491 | throw new Jbig2Error("parseJbig2 - invalid header.");
|
2492 | }
|
2493 |
|
2494 | const header = Object.create(null);
|
2495 | position += 8;
|
2496 | const flags = data[position++];
|
2497 | header.randomAccess = !(flags & 1);
|
2498 |
|
2499 | if (!(flags & 2)) {
|
2500 | header.numberOfPages = (0, _core_utils.readUint32)(data, position);
|
2501 | position += 4;
|
2502 | }
|
2503 |
|
2504 | const segments = readSegments(header, data, position, end);
|
2505 | const visitor = new SimpleSegmentVisitor();
|
2506 | processSegments(segments, visitor);
|
2507 | const {
|
2508 | width,
|
2509 | height
|
2510 | } = visitor.currentPageInfo;
|
2511 | const bitPacked = visitor.buffer;
|
2512 | const imgData = new Uint8ClampedArray(width * height);
|
2513 | let q = 0,
|
2514 | k = 0;
|
2515 |
|
2516 | for (let i = 0; i < height; i++) {
|
2517 | let mask = 0,
|
2518 | buffer;
|
2519 |
|
2520 | for (let j = 0; j < width; j++) {
|
2521 | if (!mask) {
|
2522 | mask = 128;
|
2523 | buffer = bitPacked[k++];
|
2524 | }
|
2525 |
|
2526 | imgData[q++] = buffer & mask ? 0 : 255;
|
2527 | mask >>= 1;
|
2528 | }
|
2529 | }
|
2530 |
|
2531 | return {
|
2532 | imgData,
|
2533 | width,
|
2534 | height
|
2535 | };
|
2536 | }
|
2537 |
|
2538 | class SimpleSegmentVisitor {
|
2539 | onPageInformation(info) {
|
2540 | this.currentPageInfo = info;
|
2541 | const rowSize = info.width + 7 >> 3;
|
2542 | const buffer = new Uint8ClampedArray(rowSize * info.height);
|
2543 |
|
2544 | if (info.defaultPixelValue) {
|
2545 | buffer.fill(0xff);
|
2546 | }
|
2547 |
|
2548 | this.buffer = buffer;
|
2549 | }
|
2550 |
|
2551 | drawBitmap(regionInfo, bitmap) {
|
2552 | const pageInfo = this.currentPageInfo;
|
2553 | const width = regionInfo.width,
|
2554 | height = regionInfo.height;
|
2555 | const rowSize = pageInfo.width + 7 >> 3;
|
2556 | const combinationOperator = pageInfo.combinationOperatorOverride ? regionInfo.combinationOperator : pageInfo.combinationOperator;
|
2557 | const buffer = this.buffer;
|
2558 | const mask0 = 128 >> (regionInfo.x & 7);
|
2559 | let offset0 = regionInfo.y * rowSize + (regionInfo.x >> 3);
|
2560 | let i, j, mask, offset;
|
2561 |
|
2562 | switch (combinationOperator) {
|
2563 | case 0:
|
2564 | for (i = 0; i < height; i++) {
|
2565 | mask = mask0;
|
2566 | offset = offset0;
|
2567 |
|
2568 | for (j = 0; j < width; j++) {
|
2569 | if (bitmap[i][j]) {
|
2570 | buffer[offset] |= mask;
|
2571 | }
|
2572 |
|
2573 | mask >>= 1;
|
2574 |
|
2575 | if (!mask) {
|
2576 | mask = 128;
|
2577 | offset++;
|
2578 | }
|
2579 | }
|
2580 |
|
2581 | offset0 += rowSize;
|
2582 | }
|
2583 |
|
2584 | break;
|
2585 |
|
2586 | case 2:
|
2587 | for (i = 0; i < height; i++) {
|
2588 | mask = mask0;
|
2589 | offset = offset0;
|
2590 |
|
2591 | for (j = 0; j < width; j++) {
|
2592 | if (bitmap[i][j]) {
|
2593 | buffer[offset] ^= mask;
|
2594 | }
|
2595 |
|
2596 | mask >>= 1;
|
2597 |
|
2598 | if (!mask) {
|
2599 | mask = 128;
|
2600 | offset++;
|
2601 | }
|
2602 | }
|
2603 |
|
2604 | offset0 += rowSize;
|
2605 | }
|
2606 |
|
2607 | break;
|
2608 |
|
2609 | default:
|
2610 | throw new Jbig2Error(`operator ${combinationOperator} is not supported`);
|
2611 | }
|
2612 | }
|
2613 |
|
2614 | onImmediateGenericRegion(region, data, start, end) {
|
2615 | const regionInfo = region.info;
|
2616 | const decodingContext = new DecodingContext(data, start, end);
|
2617 | const bitmap = decodeBitmap(region.mmr, regionInfo.width, regionInfo.height, region.template, region.prediction, null, region.at, decodingContext);
|
2618 | this.drawBitmap(regionInfo, bitmap);
|
2619 | }
|
2620 |
|
2621 | onImmediateLosslessGenericRegion() {
|
2622 | this.onImmediateGenericRegion.apply(this, arguments);
|
2623 | }
|
2624 |
|
2625 | onSymbolDictionary(dictionary, currentSegment, referredSegments, data, start, end) {
|
2626 | let huffmanTables, huffmanInput;
|
2627 |
|
2628 | if (dictionary.huffman) {
|
2629 | huffmanTables = getSymbolDictionaryHuffmanTables(dictionary, referredSegments, this.customTables);
|
2630 | huffmanInput = new Reader(data, start, end);
|
2631 | }
|
2632 |
|
2633 | let symbols = this.symbols;
|
2634 |
|
2635 | if (!symbols) {
|
2636 | this.symbols = symbols = {};
|
2637 | }
|
2638 |
|
2639 | const inputSymbols = [];
|
2640 |
|
2641 | for (const referredSegment of referredSegments) {
|
2642 | const referredSymbols = symbols[referredSegment];
|
2643 |
|
2644 | if (referredSymbols) {
|
2645 | inputSymbols.push(...referredSymbols);
|
2646 | }
|
2647 | }
|
2648 |
|
2649 | const decodingContext = new DecodingContext(data, start, end);
|
2650 | symbols[currentSegment] = decodeSymbolDictionary(dictionary.huffman, dictionary.refinement, inputSymbols, dictionary.numberOfNewSymbols, dictionary.numberOfExportedSymbols, huffmanTables, dictionary.template, dictionary.at, dictionary.refinementTemplate, dictionary.refinementAt, decodingContext, huffmanInput);
|
2651 | }
|
2652 |
|
2653 | onImmediateTextRegion(region, referredSegments, data, start, end) {
|
2654 | const regionInfo = region.info;
|
2655 | let huffmanTables, huffmanInput;
|
2656 | const symbols = this.symbols;
|
2657 | const inputSymbols = [];
|
2658 |
|
2659 | for (const referredSegment of referredSegments) {
|
2660 | const referredSymbols = symbols[referredSegment];
|
2661 |
|
2662 | if (referredSymbols) {
|
2663 | inputSymbols.push(...referredSymbols);
|
2664 | }
|
2665 | }
|
2666 |
|
2667 | const symbolCodeLength = (0, _core_utils.log2)(inputSymbols.length);
|
2668 |
|
2669 | if (region.huffman) {
|
2670 | huffmanInput = new Reader(data, start, end);
|
2671 | huffmanTables = getTextRegionHuffmanTables(region, referredSegments, this.customTables, inputSymbols.length, huffmanInput);
|
2672 | }
|
2673 |
|
2674 | const decodingContext = new DecodingContext(data, start, end);
|
2675 | const 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);
|
2676 | this.drawBitmap(regionInfo, bitmap);
|
2677 | }
|
2678 |
|
2679 | onImmediateLosslessTextRegion() {
|
2680 | this.onImmediateTextRegion.apply(this, arguments);
|
2681 | }
|
2682 |
|
2683 | onPatternDictionary(dictionary, currentSegment, data, start, end) {
|
2684 | let patterns = this.patterns;
|
2685 |
|
2686 | if (!patterns) {
|
2687 | this.patterns = patterns = {};
|
2688 | }
|
2689 |
|
2690 | const decodingContext = new DecodingContext(data, start, end);
|
2691 | patterns[currentSegment] = decodePatternDictionary(dictionary.mmr, dictionary.patternWidth, dictionary.patternHeight, dictionary.maxPatternIndex, dictionary.template, decodingContext);
|
2692 | }
|
2693 |
|
2694 | onImmediateHalftoneRegion(region, referredSegments, data, start, end) {
|
2695 | const patterns = this.patterns[referredSegments[0]];
|
2696 | const regionInfo = region.info;
|
2697 | const decodingContext = new DecodingContext(data, start, end);
|
2698 | 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);
|
2699 | this.drawBitmap(regionInfo, bitmap);
|
2700 | }
|
2701 |
|
2702 | onImmediateLosslessHalftoneRegion() {
|
2703 | this.onImmediateHalftoneRegion.apply(this, arguments);
|
2704 | }
|
2705 |
|
2706 | onTables(currentSegment, data, start, end) {
|
2707 | let customTables = this.customTables;
|
2708 |
|
2709 | if (!customTables) {
|
2710 | this.customTables = customTables = {};
|
2711 | }
|
2712 |
|
2713 | customTables[currentSegment] = decodeTablesSegment(data, start, end);
|
2714 | }
|
2715 |
|
2716 | }
|
2717 |
|
2718 | class HuffmanLine {
|
2719 | constructor(lineData) {
|
2720 | if (lineData.length === 2) {
|
2721 | this.isOOB = true;
|
2722 | this.rangeLow = 0;
|
2723 | this.prefixLength = lineData[0];
|
2724 | this.rangeLength = 0;
|
2725 | this.prefixCode = lineData[1];
|
2726 | this.isLowerRange = false;
|
2727 | } else {
|
2728 | this.isOOB = false;
|
2729 | this.rangeLow = lineData[0];
|
2730 | this.prefixLength = lineData[1];
|
2731 | this.rangeLength = lineData[2];
|
2732 | this.prefixCode = lineData[3];
|
2733 | this.isLowerRange = lineData[4] === "lower";
|
2734 | }
|
2735 | }
|
2736 |
|
2737 | }
|
2738 |
|
2739 | class HuffmanTreeNode {
|
2740 | constructor(line) {
|
2741 | this.children = [];
|
2742 |
|
2743 | if (line) {
|
2744 | this.isLeaf = true;
|
2745 | this.rangeLength = line.rangeLength;
|
2746 | this.rangeLow = line.rangeLow;
|
2747 | this.isLowerRange = line.isLowerRange;
|
2748 | this.isOOB = line.isOOB;
|
2749 | } else {
|
2750 | this.isLeaf = false;
|
2751 | }
|
2752 | }
|
2753 |
|
2754 | buildTree(line, shift) {
|
2755 | const bit = line.prefixCode >> shift & 1;
|
2756 |
|
2757 | if (shift <= 0) {
|
2758 | this.children[bit] = new HuffmanTreeNode(line);
|
2759 | } else {
|
2760 | let node = this.children[bit];
|
2761 |
|
2762 | if (!node) {
|
2763 | this.children[bit] = node = new HuffmanTreeNode(null);
|
2764 | }
|
2765 |
|
2766 | node.buildTree(line, shift - 1);
|
2767 | }
|
2768 | }
|
2769 |
|
2770 | decodeNode(reader) {
|
2771 | if (this.isLeaf) {
|
2772 | if (this.isOOB) {
|
2773 | return null;
|
2774 | }
|
2775 |
|
2776 | const htOffset = reader.readBits(this.rangeLength);
|
2777 | return this.rangeLow + (this.isLowerRange ? -htOffset : htOffset);
|
2778 | }
|
2779 |
|
2780 | const node = this.children[reader.readBit()];
|
2781 |
|
2782 | if (!node) {
|
2783 | throw new Jbig2Error("invalid Huffman data");
|
2784 | }
|
2785 |
|
2786 | return node.decodeNode(reader);
|
2787 | }
|
2788 |
|
2789 | }
|
2790 |
|
2791 | class HuffmanTable {
|
2792 | constructor(lines, prefixCodesDone) {
|
2793 | if (!prefixCodesDone) {
|
2794 | this.assignPrefixCodes(lines);
|
2795 | }
|
2796 |
|
2797 | this.rootNode = new HuffmanTreeNode(null);
|
2798 |
|
2799 | for (let i = 0, ii = lines.length; i < ii; i++) {
|
2800 | const line = lines[i];
|
2801 |
|
2802 | if (line.prefixLength > 0) {
|
2803 | this.rootNode.buildTree(line, line.prefixLength - 1);
|
2804 | }
|
2805 | }
|
2806 | }
|
2807 |
|
2808 | decode(reader) {
|
2809 | return this.rootNode.decodeNode(reader);
|
2810 | }
|
2811 |
|
2812 | assignPrefixCodes(lines) {
|
2813 | const linesLength = lines.length;
|
2814 | let prefixLengthMax = 0;
|
2815 |
|
2816 | for (let i = 0; i < linesLength; i++) {
|
2817 | prefixLengthMax = Math.max(prefixLengthMax, lines[i].prefixLength);
|
2818 | }
|
2819 |
|
2820 | const histogram = new Uint32Array(prefixLengthMax + 1);
|
2821 |
|
2822 | for (let i = 0; i < linesLength; i++) {
|
2823 | histogram[lines[i].prefixLength]++;
|
2824 | }
|
2825 |
|
2826 | let currentLength = 1,
|
2827 | firstCode = 0,
|
2828 | currentCode,
|
2829 | currentTemp,
|
2830 | line;
|
2831 | histogram[0] = 0;
|
2832 |
|
2833 | while (currentLength <= prefixLengthMax) {
|
2834 | firstCode = firstCode + histogram[currentLength - 1] << 1;
|
2835 | currentCode = firstCode;
|
2836 | currentTemp = 0;
|
2837 |
|
2838 | while (currentTemp < linesLength) {
|
2839 | line = lines[currentTemp];
|
2840 |
|
2841 | if (line.prefixLength === currentLength) {
|
2842 | line.prefixCode = currentCode;
|
2843 | currentCode++;
|
2844 | }
|
2845 |
|
2846 | currentTemp++;
|
2847 | }
|
2848 |
|
2849 | currentLength++;
|
2850 | }
|
2851 | }
|
2852 |
|
2853 | }
|
2854 |
|
2855 | function decodeTablesSegment(data, start, end) {
|
2856 | const flags = data[start];
|
2857 | const lowestValue = (0, _core_utils.readUint32)(data, start + 1) & 0xffffffff;
|
2858 | const highestValue = (0, _core_utils.readUint32)(data, start + 5) & 0xffffffff;
|
2859 | const reader = new Reader(data, start + 9, end);
|
2860 | const prefixSizeBits = (flags >> 1 & 7) + 1;
|
2861 | const rangeSizeBits = (flags >> 4 & 7) + 1;
|
2862 | const lines = [];
|
2863 | let prefixLength,
|
2864 | rangeLength,
|
2865 | currentRangeLow = lowestValue;
|
2866 |
|
2867 | do {
|
2868 | prefixLength = reader.readBits(prefixSizeBits);
|
2869 | rangeLength = reader.readBits(rangeSizeBits);
|
2870 | lines.push(new HuffmanLine([currentRangeLow, prefixLength, rangeLength, 0]));
|
2871 | currentRangeLow += 1 << rangeLength;
|
2872 | } while (currentRangeLow < highestValue);
|
2873 |
|
2874 | prefixLength = reader.readBits(prefixSizeBits);
|
2875 | lines.push(new HuffmanLine([lowestValue - 1, prefixLength, 32, 0, "lower"]));
|
2876 | prefixLength = reader.readBits(prefixSizeBits);
|
2877 | lines.push(new HuffmanLine([highestValue, prefixLength, 32, 0]));
|
2878 |
|
2879 | if (flags & 1) {
|
2880 | prefixLength = reader.readBits(prefixSizeBits);
|
2881 | lines.push(new HuffmanLine([prefixLength, 0]));
|
2882 | }
|
2883 |
|
2884 | return new HuffmanTable(lines, false);
|
2885 | }
|
2886 |
|
2887 | const standardTablesCache = {};
|
2888 |
|
2889 | function getStandardTable(number) {
|
2890 | let table = standardTablesCache[number];
|
2891 |
|
2892 | if (table) {
|
2893 | return table;
|
2894 | }
|
2895 |
|
2896 | let lines;
|
2897 |
|
2898 | switch (number) {
|
2899 | case 1:
|
2900 | lines = [[0, 1, 4, 0x0], [16, 2, 8, 0x2], [272, 3, 16, 0x6], [65808, 3, 32, 0x7]];
|
2901 | break;
|
2902 |
|
2903 | case 2:
|
2904 | 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]];
|
2905 | break;
|
2906 |
|
2907 | case 3:
|
2908 | 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]];
|
2909 | break;
|
2910 |
|
2911 | case 4:
|
2912 | 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]];
|
2913 | break;
|
2914 |
|
2915 | case 5:
|
2916 | 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]];
|
2917 | break;
|
2918 |
|
2919 | case 6:
|
2920 | 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]];
|
2921 | break;
|
2922 |
|
2923 | case 7:
|
2924 | 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]];
|
2925 | break;
|
2926 |
|
2927 | case 8:
|
2928 | 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]];
|
2929 | break;
|
2930 |
|
2931 | case 9:
|
2932 | 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]];
|
2933 | break;
|
2934 |
|
2935 | case 10:
|
2936 | 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]];
|
2937 | break;
|
2938 |
|
2939 | case 11:
|
2940 | 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]];
|
2941 | break;
|
2942 |
|
2943 | case 12:
|
2944 | 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]];
|
2945 | break;
|
2946 |
|
2947 | case 13:
|
2948 | 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]];
|
2949 | break;
|
2950 |
|
2951 | case 14:
|
2952 | lines = [[-2, 3, 0, 0x4], [-1, 3, 0, 0x5], [0, 1, 0, 0x0], [1, 3, 0, 0x6], [2, 3, 0, 0x7]];
|
2953 | break;
|
2954 |
|
2955 | case 15:
|
2956 | 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]];
|
2957 | break;
|
2958 |
|
2959 | default:
|
2960 | throw new Jbig2Error(`standard table B.${number} does not exist`);
|
2961 | }
|
2962 |
|
2963 | for (let i = 0, ii = lines.length; i < ii; i++) {
|
2964 | lines[i] = new HuffmanLine(lines[i]);
|
2965 | }
|
2966 |
|
2967 | table = new HuffmanTable(lines, true);
|
2968 | standardTablesCache[number] = table;
|
2969 | return table;
|
2970 | }
|
2971 |
|
2972 | class Reader {
|
2973 | constructor(data, start, end) {
|
2974 | this.data = data;
|
2975 | this.start = start;
|
2976 | this.end = end;
|
2977 | this.position = start;
|
2978 | this.shift = -1;
|
2979 | this.currentByte = 0;
|
2980 | }
|
2981 |
|
2982 | readBit() {
|
2983 | if (this.shift < 0) {
|
2984 | if (this.position >= this.end) {
|
2985 | throw new Jbig2Error("end of data while reading bit");
|
2986 | }
|
2987 |
|
2988 | this.currentByte = this.data[this.position++];
|
2989 | this.shift = 7;
|
2990 | }
|
2991 |
|
2992 | const bit = this.currentByte >> this.shift & 1;
|
2993 | this.shift--;
|
2994 | return bit;
|
2995 | }
|
2996 |
|
2997 | readBits(numBits) {
|
2998 | let result = 0,
|
2999 | i;
|
3000 |
|
3001 | for (i = numBits - 1; i >= 0; i--) {
|
3002 | result |= this.readBit() << i;
|
3003 | }
|
3004 |
|
3005 | return result;
|
3006 | }
|
3007 |
|
3008 | byteAlign() {
|
3009 | this.shift = -1;
|
3010 | }
|
3011 |
|
3012 | next() {
|
3013 | if (this.position >= this.end) {
|
3014 | return -1;
|
3015 | }
|
3016 |
|
3017 | return this.data[this.position++];
|
3018 | }
|
3019 |
|
3020 | }
|
3021 |
|
3022 | function getCustomHuffmanTable(index, referredTo, customTables) {
|
3023 | let currentIndex = 0;
|
3024 |
|
3025 | for (let i = 0, ii = referredTo.length; i < ii; i++) {
|
3026 | const table = customTables[referredTo[i]];
|
3027 |
|
3028 | if (table) {
|
3029 | if (index === currentIndex) {
|
3030 | return table;
|
3031 | }
|
3032 |
|
3033 | currentIndex++;
|
3034 | }
|
3035 | }
|
3036 |
|
3037 | throw new Jbig2Error("can't find custom Huffman table");
|
3038 | }
|
3039 |
|
3040 | function getTextRegionHuffmanTables(textRegion, referredTo, customTables, numberOfSymbols, reader) {
|
3041 | const codes = [];
|
3042 |
|
3043 | for (let i = 0; i <= 34; i++) {
|
3044 | const codeLength = reader.readBits(4);
|
3045 | codes.push(new HuffmanLine([i, codeLength, 0, 0]));
|
3046 | }
|
3047 |
|
3048 | const runCodesTable = new HuffmanTable(codes, false);
|
3049 | codes.length = 0;
|
3050 |
|
3051 | for (let i = 0; i < numberOfSymbols;) {
|
3052 | const codeLength = runCodesTable.decode(reader);
|
3053 |
|
3054 | if (codeLength >= 32) {
|
3055 | let repeatedLength, numberOfRepeats, j;
|
3056 |
|
3057 | switch (codeLength) {
|
3058 | case 32:
|
3059 | if (i === 0) {
|
3060 | throw new Jbig2Error("no previous value in symbol ID table");
|
3061 | }
|
3062 |
|
3063 | numberOfRepeats = reader.readBits(2) + 3;
|
3064 | repeatedLength = codes[i - 1].prefixLength;
|
3065 | break;
|
3066 |
|
3067 | case 33:
|
3068 | numberOfRepeats = reader.readBits(3) + 3;
|
3069 | repeatedLength = 0;
|
3070 | break;
|
3071 |
|
3072 | case 34:
|
3073 | numberOfRepeats = reader.readBits(7) + 11;
|
3074 | repeatedLength = 0;
|
3075 | break;
|
3076 |
|
3077 | default:
|
3078 | throw new Jbig2Error("invalid code length in symbol ID table");
|
3079 | }
|
3080 |
|
3081 | for (j = 0; j < numberOfRepeats; j++) {
|
3082 | codes.push(new HuffmanLine([i, repeatedLength, 0, 0]));
|
3083 | i++;
|
3084 | }
|
3085 | } else {
|
3086 | codes.push(new HuffmanLine([i, codeLength, 0, 0]));
|
3087 | i++;
|
3088 | }
|
3089 | }
|
3090 |
|
3091 | reader.byteAlign();
|
3092 | const symbolIDTable = new HuffmanTable(codes, false);
|
3093 | let customIndex = 0,
|
3094 | tableFirstS,
|
3095 | tableDeltaS,
|
3096 | tableDeltaT;
|
3097 |
|
3098 | switch (textRegion.huffmanFS) {
|
3099 | case 0:
|
3100 | case 1:
|
3101 | tableFirstS = getStandardTable(textRegion.huffmanFS + 6);
|
3102 | break;
|
3103 |
|
3104 | case 3:
|
3105 | tableFirstS = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
3106 | customIndex++;
|
3107 | break;
|
3108 |
|
3109 | default:
|
3110 | throw new Jbig2Error("invalid Huffman FS selector");
|
3111 | }
|
3112 |
|
3113 | switch (textRegion.huffmanDS) {
|
3114 | case 0:
|
3115 | case 1:
|
3116 | case 2:
|
3117 | tableDeltaS = getStandardTable(textRegion.huffmanDS + 8);
|
3118 | break;
|
3119 |
|
3120 | case 3:
|
3121 | tableDeltaS = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
3122 | customIndex++;
|
3123 | break;
|
3124 |
|
3125 | default:
|
3126 | throw new Jbig2Error("invalid Huffman DS selector");
|
3127 | }
|
3128 |
|
3129 | switch (textRegion.huffmanDT) {
|
3130 | case 0:
|
3131 | case 1:
|
3132 | case 2:
|
3133 | tableDeltaT = getStandardTable(textRegion.huffmanDT + 11);
|
3134 | break;
|
3135 |
|
3136 | case 3:
|
3137 | tableDeltaT = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
3138 | customIndex++;
|
3139 | break;
|
3140 |
|
3141 | default:
|
3142 | throw new Jbig2Error("invalid Huffman DT selector");
|
3143 | }
|
3144 |
|
3145 | if (textRegion.refinement) {
|
3146 | throw new Jbig2Error("refinement with Huffman is not supported");
|
3147 | }
|
3148 |
|
3149 | return {
|
3150 | symbolIDTable,
|
3151 | tableFirstS,
|
3152 | tableDeltaS,
|
3153 | tableDeltaT
|
3154 | };
|
3155 | }
|
3156 |
|
3157 | function getSymbolDictionaryHuffmanTables(dictionary, referredTo, customTables) {
|
3158 | let customIndex = 0,
|
3159 | tableDeltaHeight,
|
3160 | tableDeltaWidth;
|
3161 |
|
3162 | switch (dictionary.huffmanDHSelector) {
|
3163 | case 0:
|
3164 | case 1:
|
3165 | tableDeltaHeight = getStandardTable(dictionary.huffmanDHSelector + 4);
|
3166 | break;
|
3167 |
|
3168 | case 3:
|
3169 | tableDeltaHeight = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
3170 | customIndex++;
|
3171 | break;
|
3172 |
|
3173 | default:
|
3174 | throw new Jbig2Error("invalid Huffman DH selector");
|
3175 | }
|
3176 |
|
3177 | switch (dictionary.huffmanDWSelector) {
|
3178 | case 0:
|
3179 | case 1:
|
3180 | tableDeltaWidth = getStandardTable(dictionary.huffmanDWSelector + 2);
|
3181 | break;
|
3182 |
|
3183 | case 3:
|
3184 | tableDeltaWidth = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
3185 | customIndex++;
|
3186 | break;
|
3187 |
|
3188 | default:
|
3189 | throw new Jbig2Error("invalid Huffman DW selector");
|
3190 | }
|
3191 |
|
3192 | let tableBitmapSize, tableAggregateInstances;
|
3193 |
|
3194 | if (dictionary.bitmapSizeSelector) {
|
3195 | tableBitmapSize = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
3196 | customIndex++;
|
3197 | } else {
|
3198 | tableBitmapSize = getStandardTable(1);
|
3199 | }
|
3200 |
|
3201 | if (dictionary.aggregationInstancesSelector) {
|
3202 | tableAggregateInstances = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
3203 | } else {
|
3204 | tableAggregateInstances = getStandardTable(1);
|
3205 | }
|
3206 |
|
3207 | return {
|
3208 | tableDeltaHeight,
|
3209 | tableDeltaWidth,
|
3210 | tableBitmapSize,
|
3211 | tableAggregateInstances
|
3212 | };
|
3213 | }
|
3214 |
|
3215 | function readUncompressedBitmap(reader, width, height) {
|
3216 | const bitmap = [];
|
3217 |
|
3218 | for (let y = 0; y < height; y++) {
|
3219 | const row = new Uint8Array(width);
|
3220 | bitmap.push(row);
|
3221 |
|
3222 | for (let x = 0; x < width; x++) {
|
3223 | row[x] = reader.readBit();
|
3224 | }
|
3225 |
|
3226 | reader.byteAlign();
|
3227 | }
|
3228 |
|
3229 | return bitmap;
|
3230 | }
|
3231 |
|
3232 | function decodeMMRBitmap(input, width, height, endOfBlock) {
|
3233 | const params = {
|
3234 | K: -1,
|
3235 | Columns: width,
|
3236 | Rows: height,
|
3237 | BlackIs1: true,
|
3238 | EndOfBlock: endOfBlock
|
3239 | };
|
3240 | const decoder = new _ccitt.CCITTFaxDecoder(input, params);
|
3241 | const bitmap = [];
|
3242 | let currentByte,
|
3243 | eof = false;
|
3244 |
|
3245 | for (let y = 0; y < height; y++) {
|
3246 | const row = new Uint8Array(width);
|
3247 | bitmap.push(row);
|
3248 | let shift = -1;
|
3249 |
|
3250 | for (let x = 0; x < width; x++) {
|
3251 | if (shift < 0) {
|
3252 | currentByte = decoder.readNextChar();
|
3253 |
|
3254 | if (currentByte === -1) {
|
3255 | currentByte = 0;
|
3256 | eof = true;
|
3257 | }
|
3258 |
|
3259 | shift = 7;
|
3260 | }
|
3261 |
|
3262 | row[x] = currentByte >> shift & 1;
|
3263 | shift--;
|
3264 | }
|
3265 | }
|
3266 |
|
3267 | if (endOfBlock && !eof) {
|
3268 | const lookForEOFLimit = 5;
|
3269 |
|
3270 | for (let i = 0; i < lookForEOFLimit; i++) {
|
3271 | if (decoder.readNextChar() === -1) {
|
3272 | break;
|
3273 | }
|
3274 | }
|
3275 | }
|
3276 |
|
3277 | return bitmap;
|
3278 | }
|
3279 |
|
3280 | class Jbig2Image {
|
3281 | parseChunks(chunks) {
|
3282 | return parseJbig2Chunks(chunks);
|
3283 | }
|
3284 |
|
3285 | parse(data) {
|
3286 | const {
|
3287 | imgData,
|
3288 | width,
|
3289 | height
|
3290 | } = parseJbig2(data);
|
3291 | this.width = width;
|
3292 | this.height = height;
|
3293 | return imgData;
|
3294 | }
|
3295 |
|
3296 | }
|
3297 |
|
3298 | exports.Jbig2Image = Jbig2Image;
|
3299 |
|
3300 | }),
|
3301 |
|
3302 | ((__unused_webpack_module, exports, __w_pdfjs_require__) => {
|
3303 |
|
3304 |
|
3305 |
|
3306 | Object.defineProperty(exports, "__esModule", ({
|
3307 | value: true
|
3308 | }));
|
3309 | exports.XRefParseException = exports.XRefEntryException = exports.ParserEOFException = exports.MissingDataException = exports.DocStats = void 0;
|
3310 | exports.collectActions = collectActions;
|
3311 | exports.encodeToXmlString = encodeToXmlString;
|
3312 | exports.escapePDFName = escapePDFName;
|
3313 | exports.getArrayLookupTableFactory = getArrayLookupTableFactory;
|
3314 | exports.getInheritableProperty = getInheritableProperty;
|
3315 | exports.getLookupTableFactory = getLookupTableFactory;
|
3316 | exports.getNewAnnotationsMap = getNewAnnotationsMap;
|
3317 | exports.isWhiteSpace = isWhiteSpace;
|
3318 | exports.log2 = log2;
|
3319 | exports.numberToString = numberToString;
|
3320 | exports.parseXFAPath = parseXFAPath;
|
3321 | exports.readInt8 = readInt8;
|
3322 | exports.readUint16 = readUint16;
|
3323 | exports.readUint32 = readUint32;
|
3324 | exports.recoverJsURL = recoverJsURL;
|
3325 | exports.toRomanNumerals = toRomanNumerals;
|
3326 | exports.validateCSSFont = validateCSSFont;
|
3327 |
|
3328 | var _util = __w_pdfjs_require__(1);
|
3329 |
|
3330 | var _primitives = __w_pdfjs_require__(6);
|
3331 |
|
3332 | var _base_stream = __w_pdfjs_require__(7);
|
3333 |
|
3334 | function getLookupTableFactory(initializer) {
|
3335 | let lookup;
|
3336 | return function () {
|
3337 | if (initializer) {
|
3338 | lookup = Object.create(null);
|
3339 | initializer(lookup);
|
3340 | initializer = null;
|
3341 | }
|
3342 |
|
3343 | return lookup;
|
3344 | };
|
3345 | }
|
3346 |
|
3347 | function getArrayLookupTableFactory(initializer) {
|
3348 | let lookup;
|
3349 | return function () {
|
3350 | if (initializer) {
|
3351 | let arr = initializer();
|
3352 | initializer = null;
|
3353 | lookup = Object.create(null);
|
3354 |
|
3355 | for (let i = 0, ii = arr.length; i < ii; i += 2) {
|
3356 | lookup[arr[i]] = arr[i + 1];
|
3357 | }
|
3358 |
|
3359 | arr = null;
|
3360 | }
|
3361 |
|
3362 | return lookup;
|
3363 | };
|
3364 | }
|
3365 |
|
3366 | class MissingDataException extends _util.BaseException {
|
3367 | constructor(begin, end) {
|
3368 | super(`Missing data [${begin}, ${end})`, "MissingDataException");
|
3369 | this.begin = begin;
|
3370 | this.end = end;
|
3371 | }
|
3372 |
|
3373 | }
|
3374 |
|
3375 | exports.MissingDataException = MissingDataException;
|
3376 |
|
3377 | class ParserEOFException extends _util.BaseException {
|
3378 | constructor(msg) {
|
3379 | super(msg, "ParserEOFException");
|
3380 | }
|
3381 |
|
3382 | }
|
3383 |
|
3384 | exports.ParserEOFException = ParserEOFException;
|
3385 |
|
3386 | class XRefEntryException extends _util.BaseException {
|
3387 | constructor(msg) {
|
3388 | super(msg, "XRefEntryException");
|
3389 | }
|
3390 |
|
3391 | }
|
3392 |
|
3393 | exports.XRefEntryException = XRefEntryException;
|
3394 |
|
3395 | class XRefParseException extends _util.BaseException {
|
3396 | constructor(msg) {
|
3397 | super(msg, "XRefParseException");
|
3398 | }
|
3399 |
|
3400 | }
|
3401 |
|
3402 | exports.XRefParseException = XRefParseException;
|
3403 |
|
3404 | class DocStats {
|
3405 | constructor(handler) {
|
3406 | this._handler = handler;
|
3407 | this._streamTypes = new Set();
|
3408 | this._fontTypes = new Set();
|
3409 | }
|
3410 |
|
3411 | _send() {
|
3412 | const streamTypes = Object.create(null),
|
3413 | fontTypes = Object.create(null);
|
3414 |
|
3415 | for (const type of this._streamTypes) {
|
3416 | streamTypes[type] = true;
|
3417 | }
|
3418 |
|
3419 | for (const type of this._fontTypes) {
|
3420 | fontTypes[type] = true;
|
3421 | }
|
3422 |
|
3423 | this._handler.send("DocStats", {
|
3424 | streamTypes,
|
3425 | fontTypes
|
3426 | });
|
3427 | }
|
3428 |
|
3429 | addStreamType(type) {
|
3430 | if (this._streamTypes.has(type)) {
|
3431 | return;
|
3432 | }
|
3433 |
|
3434 | this._streamTypes.add(type);
|
3435 |
|
3436 | this._send();
|
3437 | }
|
3438 |
|
3439 | addFontType(type) {
|
3440 | if (this._fontTypes.has(type)) {
|
3441 | return;
|
3442 | }
|
3443 |
|
3444 | this._fontTypes.add(type);
|
3445 |
|
3446 | this._send();
|
3447 | }
|
3448 |
|
3449 | }
|
3450 |
|
3451 | exports.DocStats = DocStats;
|
3452 |
|
3453 | function getInheritableProperty({
|
3454 | dict,
|
3455 | key,
|
3456 | getArray = false,
|
3457 | stopWhenFound = true
|
3458 | }) {
|
3459 | let values;
|
3460 | const visited = new _primitives.RefSet();
|
3461 |
|
3462 | while (dict instanceof _primitives.Dict && !(dict.objId && visited.has(dict.objId))) {
|
3463 | if (dict.objId) {
|
3464 | visited.put(dict.objId);
|
3465 | }
|
3466 |
|
3467 | const value = getArray ? dict.getArray(key) : dict.get(key);
|
3468 |
|
3469 | if (value !== undefined) {
|
3470 | if (stopWhenFound) {
|
3471 | return value;
|
3472 | }
|
3473 |
|
3474 | if (!values) {
|
3475 | values = [];
|
3476 | }
|
3477 |
|
3478 | values.push(value);
|
3479 | }
|
3480 |
|
3481 | dict = dict.get("Parent");
|
3482 | }
|
3483 |
|
3484 | return values;
|
3485 | }
|
3486 |
|
3487 | 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"];
|
3488 |
|
3489 | function toRomanNumerals(number, lowerCase = false) {
|
3490 | (0, _util.assert)(Number.isInteger(number) && number > 0, "The number should be a positive integer.");
|
3491 | const romanBuf = [];
|
3492 | let pos;
|
3493 |
|
3494 | while (number >= 1000) {
|
3495 | number -= 1000;
|
3496 | romanBuf.push("M");
|
3497 | }
|
3498 |
|
3499 | pos = number / 100 | 0;
|
3500 | number %= 100;
|
3501 | romanBuf.push(ROMAN_NUMBER_MAP[pos]);
|
3502 | pos = number / 10 | 0;
|
3503 | number %= 10;
|
3504 | romanBuf.push(ROMAN_NUMBER_MAP[10 + pos]);
|
3505 | romanBuf.push(ROMAN_NUMBER_MAP[20 + number]);
|
3506 | const romanStr = romanBuf.join("");
|
3507 | return lowerCase ? romanStr.toLowerCase() : romanStr;
|
3508 | }
|
3509 |
|
3510 | function log2(x) {
|
3511 | if (x <= 0) {
|
3512 | return 0;
|
3513 | }
|
3514 |
|
3515 | return Math.ceil(Math.log2(x));
|
3516 | }
|
3517 |
|
3518 | function readInt8(data, offset) {
|
3519 | return data[offset] << 24 >> 24;
|
3520 | }
|
3521 |
|
3522 | function readUint16(data, offset) {
|
3523 | return data[offset] << 8 | data[offset + 1];
|
3524 | }
|
3525 |
|
3526 | function readUint32(data, offset) {
|
3527 | return (data[offset] << 24 | data[offset + 1] << 16 | data[offset + 2] << 8 | data[offset + 3]) >>> 0;
|
3528 | }
|
3529 |
|
3530 | function isWhiteSpace(ch) {
|
3531 | return ch === 0x20 || ch === 0x09 || ch === 0x0d || ch === 0x0a;
|
3532 | }
|
3533 |
|
3534 | function parseXFAPath(path) {
|
3535 | const positionPattern = /(.+)\[(\d+)\]$/;
|
3536 | return path.split(".").map(component => {
|
3537 | const m = component.match(positionPattern);
|
3538 |
|
3539 | if (m) {
|
3540 | return {
|
3541 | name: m[1],
|
3542 | pos: parseInt(m[2], 10)
|
3543 | };
|
3544 | }
|
3545 |
|
3546 | return {
|
3547 | name: component,
|
3548 | pos: 0
|
3549 | };
|
3550 | });
|
3551 | }
|
3552 |
|
3553 | function escapePDFName(str) {
|
3554 | const buffer = [];
|
3555 | let start = 0;
|
3556 |
|
3557 | for (let i = 0, ii = str.length; i < ii; i++) {
|
3558 | const char = str.charCodeAt(i);
|
3559 |
|
3560 | if (char < 0x21 || char > 0x7e || char === 0x23 || char === 0x28 || char === 0x29 || char === 0x3c || char === 0x3e || char === 0x5b || char === 0x5d || char === 0x7b || char === 0x7d || char === 0x2f || char === 0x25) {
|
3561 | if (start < i) {
|
3562 | buffer.push(str.substring(start, i));
|
3563 | }
|
3564 |
|
3565 | buffer.push(`#${char.toString(16)}`);
|
3566 | start = i + 1;
|
3567 | }
|
3568 | }
|
3569 |
|
3570 | if (buffer.length === 0) {
|
3571 | return str;
|
3572 | }
|
3573 |
|
3574 | if (start < str.length) {
|
3575 | buffer.push(str.substring(start, str.length));
|
3576 | }
|
3577 |
|
3578 | return buffer.join("");
|
3579 | }
|
3580 |
|
3581 | function _collectJS(entry, xref, list, parents) {
|
3582 | if (!entry) {
|
3583 | return;
|
3584 | }
|
3585 |
|
3586 | let parent = null;
|
3587 |
|
3588 | if (entry instanceof _primitives.Ref) {
|
3589 | if (parents.has(entry)) {
|
3590 | return;
|
3591 | }
|
3592 |
|
3593 | parent = entry;
|
3594 | parents.put(parent);
|
3595 | entry = xref.fetch(entry);
|
3596 | }
|
3597 |
|
3598 | if (Array.isArray(entry)) {
|
3599 | for (const element of entry) {
|
3600 | _collectJS(element, xref, list, parents);
|
3601 | }
|
3602 | } else if (entry instanceof _primitives.Dict) {
|
3603 | if ((0, _primitives.isName)(entry.get("S"), "JavaScript")) {
|
3604 | const js = entry.get("JS");
|
3605 | let code;
|
3606 |
|
3607 | if (js instanceof _base_stream.BaseStream) {
|
3608 | code = js.getString();
|
3609 | } else if (typeof js === "string") {
|
3610 | code = js;
|
3611 | }
|
3612 |
|
3613 | code = code && (0, _util.stringToPDFString)(code).replace(/\u0000/g, "");
|
3614 |
|
3615 | if (code) {
|
3616 | list.push(code);
|
3617 | }
|
3618 | }
|
3619 |
|
3620 | _collectJS(entry.getRaw("Next"), xref, list, parents);
|
3621 | }
|
3622 |
|
3623 | if (parent) {
|
3624 | parents.remove(parent);
|
3625 | }
|
3626 | }
|
3627 |
|
3628 | function collectActions(xref, dict, eventType) {
|
3629 | const actions = Object.create(null);
|
3630 | const additionalActionsDicts = getInheritableProperty({
|
3631 | dict,
|
3632 | key: "AA",
|
3633 | stopWhenFound: false
|
3634 | });
|
3635 |
|
3636 | if (additionalActionsDicts) {
|
3637 | for (let i = additionalActionsDicts.length - 1; i >= 0; i--) {
|
3638 | const additionalActions = additionalActionsDicts[i];
|
3639 |
|
3640 | if (!(additionalActions instanceof _primitives.Dict)) {
|
3641 | continue;
|
3642 | }
|
3643 |
|
3644 | for (const key of additionalActions.getKeys()) {
|
3645 | const action = eventType[key];
|
3646 |
|
3647 | if (!action) {
|
3648 | continue;
|
3649 | }
|
3650 |
|
3651 | const actionDict = additionalActions.getRaw(key);
|
3652 | const parents = new _primitives.RefSet();
|
3653 | const list = [];
|
3654 |
|
3655 | _collectJS(actionDict, xref, list, parents);
|
3656 |
|
3657 | if (list.length > 0) {
|
3658 | actions[action] = list;
|
3659 | }
|
3660 | }
|
3661 | }
|
3662 | }
|
3663 |
|
3664 | if (dict.has("A")) {
|
3665 | const actionDict = dict.get("A");
|
3666 | const parents = new _primitives.RefSet();
|
3667 | const list = [];
|
3668 |
|
3669 | _collectJS(actionDict, xref, list, parents);
|
3670 |
|
3671 | if (list.length > 0) {
|
3672 | actions.Action = list;
|
3673 | }
|
3674 | }
|
3675 |
|
3676 | return (0, _util.objectSize)(actions) > 0 ? actions : null;
|
3677 | }
|
3678 |
|
3679 | const XMLEntities = {
|
3680 | 0x3c: "<",
|
3681 | 0x3e: ">",
|
3682 | 0x26: "&",
|
3683 | 0x22: """,
|
3684 | 0x27: "'"
|
3685 | };
|
3686 |
|
3687 | function encodeToXmlString(str) {
|
3688 | const buffer = [];
|
3689 | let start = 0;
|
3690 |
|
3691 | for (let i = 0, ii = str.length; i < ii; i++) {
|
3692 | const char = str.codePointAt(i);
|
3693 |
|
3694 | if (0x20 <= char && char <= 0x7e) {
|
3695 | const entity = XMLEntities[char];
|
3696 |
|
3697 | if (entity) {
|
3698 | if (start < i) {
|
3699 | buffer.push(str.substring(start, i));
|
3700 | }
|
3701 |
|
3702 | buffer.push(entity);
|
3703 | start = i + 1;
|
3704 | }
|
3705 | } else {
|
3706 | if (start < i) {
|
3707 | buffer.push(str.substring(start, i));
|
3708 | }
|
3709 |
|
3710 | buffer.push(`&#x${char.toString(16).toUpperCase()};`);
|
3711 |
|
3712 | if (char > 0xd7ff && (char < 0xe000 || char > 0xfffd)) {
|
3713 | i++;
|
3714 | }
|
3715 |
|
3716 | start = i + 1;
|
3717 | }
|
3718 | }
|
3719 |
|
3720 | if (buffer.length === 0) {
|
3721 | return str;
|
3722 | }
|
3723 |
|
3724 | if (start < str.length) {
|
3725 | buffer.push(str.substring(start, str.length));
|
3726 | }
|
3727 |
|
3728 | return buffer.join("");
|
3729 | }
|
3730 |
|
3731 | function validateCSSFont(cssFontInfo) {
|
3732 | const DEFAULT_CSS_FONT_OBLIQUE = "14";
|
3733 | const DEFAULT_CSS_FONT_WEIGHT = "400";
|
3734 | const CSS_FONT_WEIGHT_VALUES = new Set(["100", "200", "300", "400", "500", "600", "700", "800", "900", "1000", "normal", "bold", "bolder", "lighter"]);
|
3735 | const {
|
3736 | fontFamily,
|
3737 | fontWeight,
|
3738 | italicAngle
|
3739 | } = cssFontInfo;
|
3740 |
|
3741 | if (/^".*"$/.test(fontFamily)) {
|
3742 | if (/[^\\]"/.test(fontFamily.slice(1, fontFamily.length - 1))) {
|
3743 | (0, _util.warn)(`XFA - FontFamily contains some unescaped ": ${fontFamily}.`);
|
3744 | return false;
|
3745 | }
|
3746 | } else if (/^'.*'$/.test(fontFamily)) {
|
3747 | if (/[^\\]'/.test(fontFamily.slice(1, fontFamily.length - 1))) {
|
3748 | (0, _util.warn)(`XFA - FontFamily contains some unescaped ': ${fontFamily}.`);
|
3749 | return false;
|
3750 | }
|
3751 | } else {
|
3752 | for (const ident of fontFamily.split(/[ \t]+/)) {
|
3753 | if (/^(\d|(-(\d|-)))/.test(ident) || !/^[\w-\\]+$/.test(ident)) {
|
3754 | (0, _util.warn)(`XFA - FontFamily contains some invalid <custom-ident>: ${fontFamily}.`);
|
3755 | return false;
|
3756 | }
|
3757 | }
|
3758 | }
|
3759 |
|
3760 | const weight = fontWeight ? fontWeight.toString() : "";
|
3761 | cssFontInfo.fontWeight = CSS_FONT_WEIGHT_VALUES.has(weight) ? weight : DEFAULT_CSS_FONT_WEIGHT;
|
3762 | const angle = parseFloat(italicAngle);
|
3763 | cssFontInfo.italicAngle = isNaN(angle) || angle < -90 || angle > 90 ? DEFAULT_CSS_FONT_OBLIQUE : italicAngle.toString();
|
3764 | return true;
|
3765 | }
|
3766 |
|
3767 | function recoverJsURL(str) {
|
3768 | const URL_OPEN_METHODS = ["app.launchURL", "window.open", "xfa.host.gotoURL"];
|
3769 | const regex = new RegExp("^\\s*(" + URL_OPEN_METHODS.join("|").split(".").join("\\.") + ")\\((?:'|\")([^'\"]*)(?:'|\")(?:,\\s*(\\w+)\\)|\\))", "i");
|
3770 | const jsUrl = regex.exec(str);
|
3771 |
|
3772 | if (jsUrl && jsUrl[2]) {
|
3773 | const url = jsUrl[2];
|
3774 | let newWindow = false;
|
3775 |
|
3776 | if (jsUrl[3] === "true" && jsUrl[1] === "app.launchURL") {
|
3777 | newWindow = true;
|
3778 | }
|
3779 |
|
3780 | return {
|
3781 | url,
|
3782 | newWindow
|
3783 | };
|
3784 | }
|
3785 |
|
3786 | return null;
|
3787 | }
|
3788 |
|
3789 | function numberToString(value) {
|
3790 | if (Number.isInteger(value)) {
|
3791 | return value.toString();
|
3792 | }
|
3793 |
|
3794 | const roundedValue = Math.round(value * 100);
|
3795 |
|
3796 | if (roundedValue % 100 === 0) {
|
3797 | return (roundedValue / 100).toString();
|
3798 | }
|
3799 |
|
3800 | if (roundedValue % 10 === 0) {
|
3801 | return value.toFixed(1);
|
3802 | }
|
3803 |
|
3804 | return value.toFixed(2);
|
3805 | }
|
3806 |
|
3807 | function getNewAnnotationsMap(annotationStorage) {
|
3808 | if (!annotationStorage) {
|
3809 | return null;
|
3810 | }
|
3811 |
|
3812 | const newAnnotationsByPage = new Map();
|
3813 |
|
3814 | for (const [key, value] of annotationStorage) {
|
3815 | if (!key.startsWith(_util.AnnotationEditorPrefix)) {
|
3816 | continue;
|
3817 | }
|
3818 |
|
3819 | let annotations = newAnnotationsByPage.get(value.pageIndex);
|
3820 |
|
3821 | if (!annotations) {
|
3822 | annotations = [];
|
3823 | newAnnotationsByPage.set(value.pageIndex, annotations);
|
3824 | }
|
3825 |
|
3826 | annotations.push(value);
|
3827 | }
|
3828 |
|
3829 | return newAnnotationsByPage.size > 0 ? newAnnotationsByPage : null;
|
3830 | }
|
3831 |
|
3832 | }),
|
3833 |
|
3834 | ((__unused_webpack_module, exports, __w_pdfjs_require__) => {
|
3835 |
|
3836 |
|
3837 |
|
3838 | Object.defineProperty(exports, "__esModule", ({
|
3839 | value: true
|
3840 | }));
|
3841 | exports.RefSetCache = exports.RefSet = exports.Ref = exports.Name = exports.EOF = exports.Dict = exports.Cmd = exports.CIRCULAR_REF = void 0;
|
3842 | exports.clearPrimitiveCaches = clearPrimitiveCaches;
|
3843 | exports.isCmd = isCmd;
|
3844 | exports.isDict = isDict;
|
3845 | exports.isName = isName;
|
3846 | exports.isRefsEqual = isRefsEqual;
|
3847 |
|
3848 | var _util = __w_pdfjs_require__(1);
|
3849 |
|
3850 | const CIRCULAR_REF = Symbol("CIRCULAR_REF");
|
3851 | exports.CIRCULAR_REF = CIRCULAR_REF;
|
3852 | const EOF = Symbol("EOF");
|
3853 | exports.EOF = EOF;
|
3854 |
|
3855 | const Name = function NameClosure() {
|
3856 | let nameCache = Object.create(null);
|
3857 |
|
3858 | class Name {
|
3859 | constructor(name) {
|
3860 | this.name = name;
|
3861 | }
|
3862 |
|
3863 | static get(name) {
|
3864 | return nameCache[name] || (nameCache[name] = new Name(name));
|
3865 | }
|
3866 |
|
3867 | static _clearCache() {
|
3868 | nameCache = Object.create(null);
|
3869 | }
|
3870 |
|
3871 | }
|
3872 |
|
3873 | return Name;
|
3874 | }();
|
3875 |
|
3876 | exports.Name = Name;
|
3877 |
|
3878 | const Cmd = function CmdClosure() {
|
3879 | let cmdCache = Object.create(null);
|
3880 |
|
3881 | class Cmd {
|
3882 | constructor(cmd) {
|
3883 | this.cmd = cmd;
|
3884 | }
|
3885 |
|
3886 | static get(cmd) {
|
3887 | return cmdCache[cmd] || (cmdCache[cmd] = new Cmd(cmd));
|
3888 | }
|
3889 |
|
3890 | static _clearCache() {
|
3891 | cmdCache = Object.create(null);
|
3892 | }
|
3893 |
|
3894 | }
|
3895 |
|
3896 | return Cmd;
|
3897 | }();
|
3898 |
|
3899 | exports.Cmd = Cmd;
|
3900 |
|
3901 | const nonSerializable = function nonSerializableClosure() {
|
3902 | return nonSerializable;
|
3903 | };
|
3904 |
|
3905 | class Dict {
|
3906 | constructor(xref = null) {
|
3907 | this._map = Object.create(null);
|
3908 | this.xref = xref;
|
3909 | this.objId = null;
|
3910 | this.suppressEncryption = false;
|
3911 | this.__nonSerializable__ = nonSerializable;
|
3912 | }
|
3913 |
|
3914 | assignXref(newXref) {
|
3915 | this.xref = newXref;
|
3916 | }
|
3917 |
|
3918 | get size() {
|
3919 | return Object.keys(this._map).length;
|
3920 | }
|
3921 |
|
3922 | get(key1, key2, key3) {
|
3923 | let value = this._map[key1];
|
3924 |
|
3925 | if (value === undefined && key2 !== undefined) {
|
3926 | value = this._map[key2];
|
3927 |
|
3928 | if (value === undefined && key3 !== undefined) {
|
3929 | value = this._map[key3];
|
3930 | }
|
3931 | }
|
3932 |
|
3933 | if (value instanceof Ref && this.xref) {
|
3934 | return this.xref.fetch(value, this.suppressEncryption);
|
3935 | }
|
3936 |
|
3937 | return value;
|
3938 | }
|
3939 |
|
3940 | async getAsync(key1, key2, key3) {
|
3941 | let value = this._map[key1];
|
3942 |
|
3943 | if (value === undefined && key2 !== undefined) {
|
3944 | value = this._map[key2];
|
3945 |
|
3946 | if (value === undefined && key3 !== undefined) {
|
3947 | value = this._map[key3];
|
3948 | }
|
3949 | }
|
3950 |
|
3951 | if (value instanceof Ref && this.xref) {
|
3952 | return this.xref.fetchAsync(value, this.suppressEncryption);
|
3953 | }
|
3954 |
|
3955 | return value;
|
3956 | }
|
3957 |
|
3958 | getArray(key1, key2, key3) {
|
3959 | let value = this._map[key1];
|
3960 |
|
3961 | if (value === undefined && key2 !== undefined) {
|
3962 | value = this._map[key2];
|
3963 |
|
3964 | if (value === undefined && key3 !== undefined) {
|
3965 | value = this._map[key3];
|
3966 | }
|
3967 | }
|
3968 |
|
3969 | if (value instanceof Ref && this.xref) {
|
3970 | value = this.xref.fetch(value, this.suppressEncryption);
|
3971 | }
|
3972 |
|
3973 | if (Array.isArray(value)) {
|
3974 | value = value.slice();
|
3975 |
|
3976 | for (let i = 0, ii = value.length; i < ii; i++) {
|
3977 | if (value[i] instanceof Ref && this.xref) {
|
3978 | value[i] = this.xref.fetch(value[i], this.suppressEncryption);
|
3979 | }
|
3980 | }
|
3981 | }
|
3982 |
|
3983 | return value;
|
3984 | }
|
3985 |
|
3986 | getRaw(key) {
|
3987 | return this._map[key];
|
3988 | }
|
3989 |
|
3990 | getKeys() {
|
3991 | return Object.keys(this._map);
|
3992 | }
|
3993 |
|
3994 | getRawValues() {
|
3995 | return Object.values(this._map);
|
3996 | }
|
3997 |
|
3998 | set(key, value) {
|
3999 | this._map[key] = value;
|
4000 | }
|
4001 |
|
4002 | has(key) {
|
4003 | return this._map[key] !== undefined;
|
4004 | }
|
4005 |
|
4006 | forEach(callback) {
|
4007 | for (const key in this._map) {
|
4008 | callback(key, this.get(key));
|
4009 | }
|
4010 | }
|
4011 |
|
4012 | static get empty() {
|
4013 | const emptyDict = new Dict(null);
|
4014 |
|
4015 | emptyDict.set = (key, value) => {
|
4016 | (0, _util.unreachable)("Should not call `set` on the empty dictionary.");
|
4017 | };
|
4018 |
|
4019 | return (0, _util.shadow)(this, "empty", emptyDict);
|
4020 | }
|
4021 |
|
4022 | static merge({
|
4023 | xref,
|
4024 | dictArray,
|
4025 | mergeSubDicts = false
|
4026 | }) {
|
4027 | const mergedDict = new Dict(xref),
|
4028 | properties = new Map();
|
4029 |
|
4030 | for (const dict of dictArray) {
|
4031 | if (!(dict instanceof Dict)) {
|
4032 | continue;
|
4033 | }
|
4034 |
|
4035 | for (const [key, value] of Object.entries(dict._map)) {
|
4036 | let property = properties.get(key);
|
4037 |
|
4038 | if (property === undefined) {
|
4039 | property = [];
|
4040 | properties.set(key, property);
|
4041 | } else if (!mergeSubDicts || !(value instanceof Dict)) {
|
4042 | continue;
|
4043 | }
|
4044 |
|
4045 | property.push(value);
|
4046 | }
|
4047 | }
|
4048 |
|
4049 | for (const [name, values] of properties) {
|
4050 | if (values.length === 1 || !(values[0] instanceof Dict)) {
|
4051 | mergedDict._map[name] = values[0];
|
4052 | continue;
|
4053 | }
|
4054 |
|
4055 | const subDict = new Dict(xref);
|
4056 |
|
4057 | for (const dict of values) {
|
4058 | for (const [key, value] of Object.entries(dict._map)) {
|
4059 | if (subDict._map[key] === undefined) {
|
4060 | subDict._map[key] = value;
|
4061 | }
|
4062 | }
|
4063 | }
|
4064 |
|
4065 | if (subDict.size > 0) {
|
4066 | mergedDict._map[name] = subDict;
|
4067 | }
|
4068 | }
|
4069 |
|
4070 | properties.clear();
|
4071 | return mergedDict.size > 0 ? mergedDict : Dict.empty;
|
4072 | }
|
4073 |
|
4074 | }
|
4075 |
|
4076 | exports.Dict = Dict;
|
4077 |
|
4078 | const Ref = function RefClosure() {
|
4079 | let refCache = Object.create(null);
|
4080 |
|
4081 | class Ref {
|
4082 | constructor(num, gen) {
|
4083 | this.num = num;
|
4084 | this.gen = gen;
|
4085 | }
|
4086 |
|
4087 | toString() {
|
4088 | if (this.gen === 0) {
|
4089 | return `${this.num}R`;
|
4090 | }
|
4091 |
|
4092 | return `${this.num}R${this.gen}`;
|
4093 | }
|
4094 |
|
4095 | static get(num, gen) {
|
4096 | const key = gen === 0 ? `${num}R` : `${num}R${gen}`;
|
4097 | return refCache[key] || (refCache[key] = new Ref(num, gen));
|
4098 | }
|
4099 |
|
4100 | static _clearCache() {
|
4101 | refCache = Object.create(null);
|
4102 | }
|
4103 |
|
4104 | }
|
4105 |
|
4106 | return Ref;
|
4107 | }();
|
4108 |
|
4109 | exports.Ref = Ref;
|
4110 |
|
4111 | class RefSet {
|
4112 | constructor(parent = null) {
|
4113 | this._set = new Set(parent && parent._set);
|
4114 | }
|
4115 |
|
4116 | has(ref) {
|
4117 | return this._set.has(ref.toString());
|
4118 | }
|
4119 |
|
4120 | put(ref) {
|
4121 | this._set.add(ref.toString());
|
4122 | }
|
4123 |
|
4124 | remove(ref) {
|
4125 | this._set.delete(ref.toString());
|
4126 | }
|
4127 |
|
4128 | [Symbol.iterator]() {
|
4129 | return this._set.values();
|
4130 | }
|
4131 |
|
4132 | clear() {
|
4133 | this._set.clear();
|
4134 | }
|
4135 |
|
4136 | }
|
4137 |
|
4138 | exports.RefSet = RefSet;
|
4139 |
|
4140 | class RefSetCache {
|
4141 | constructor() {
|
4142 | this._map = new Map();
|
4143 | }
|
4144 |
|
4145 | get size() {
|
4146 | return this._map.size;
|
4147 | }
|
4148 |
|
4149 | get(ref) {
|
4150 | return this._map.get(ref.toString());
|
4151 | }
|
4152 |
|
4153 | has(ref) {
|
4154 | return this._map.has(ref.toString());
|
4155 | }
|
4156 |
|
4157 | put(ref, obj) {
|
4158 | this._map.set(ref.toString(), obj);
|
4159 | }
|
4160 |
|
4161 | putAlias(ref, aliasRef) {
|
4162 | this._map.set(ref.toString(), this.get(aliasRef));
|
4163 | }
|
4164 |
|
4165 | [Symbol.iterator]() {
|
4166 | return this._map.values();
|
4167 | }
|
4168 |
|
4169 | clear() {
|
4170 | this._map.clear();
|
4171 | }
|
4172 |
|
4173 | }
|
4174 |
|
4175 | exports.RefSetCache = RefSetCache;
|
4176 |
|
4177 | function isName(v, name) {
|
4178 | return v instanceof Name && (name === undefined || v.name === name);
|
4179 | }
|
4180 |
|
4181 | function isCmd(v, cmd) {
|
4182 | return v instanceof Cmd && (cmd === undefined || v.cmd === cmd);
|
4183 | }
|
4184 |
|
4185 | function isDict(v, type) {
|
4186 | return v instanceof Dict && (type === undefined || isName(v.get("Type"), type));
|
4187 | }
|
4188 |
|
4189 | function isRefsEqual(v1, v2) {
|
4190 | return v1.num === v2.num && v1.gen === v2.gen;
|
4191 | }
|
4192 |
|
4193 | function clearPrimitiveCaches() {
|
4194 | Cmd._clearCache();
|
4195 |
|
4196 | Name._clearCache();
|
4197 |
|
4198 | Ref._clearCache();
|
4199 | }
|
4200 |
|
4201 | }),
|
4202 |
|
4203 | ((__unused_webpack_module, exports, __w_pdfjs_require__) => {
|
4204 |
|
4205 |
|
4206 |
|
4207 | Object.defineProperty(exports, "__esModule", ({
|
4208 | value: true
|
4209 | }));
|
4210 | exports.BaseStream = void 0;
|
4211 |
|
4212 | var _util = __w_pdfjs_require__(1);
|
4213 |
|
4214 | class BaseStream {
|
4215 | constructor() {
|
4216 | if (this.constructor === BaseStream) {
|
4217 | (0, _util.unreachable)("Cannot initialize BaseStream.");
|
4218 | }
|
4219 | }
|
4220 |
|
4221 | get length() {
|
4222 | (0, _util.unreachable)("Abstract getter `length` accessed");
|
4223 | }
|
4224 |
|
4225 | get isEmpty() {
|
4226 | (0, _util.unreachable)("Abstract getter `isEmpty` accessed");
|
4227 | }
|
4228 |
|
4229 | get isDataLoaded() {
|
4230 | return (0, _util.shadow)(this, "isDataLoaded", true);
|
4231 | }
|
4232 |
|
4233 | getByte() {
|
4234 | (0, _util.unreachable)("Abstract method `getByte` called");
|
4235 | }
|
4236 |
|
4237 | getBytes(length) {
|
4238 | (0, _util.unreachable)("Abstract method `getBytes` called");
|
4239 | }
|
4240 |
|
4241 | peekByte() {
|
4242 | const peekedByte = this.getByte();
|
4243 |
|
4244 | if (peekedByte !== -1) {
|
4245 | this.pos--;
|
4246 | }
|
4247 |
|
4248 | return peekedByte;
|
4249 | }
|
4250 |
|
4251 | peekBytes(length) {
|
4252 | const bytes = this.getBytes(length);
|
4253 | this.pos -= bytes.length;
|
4254 | return bytes;
|
4255 | }
|
4256 |
|
4257 | getUint16() {
|
4258 | const b0 = this.getByte();
|
4259 | const b1 = this.getByte();
|
4260 |
|
4261 | if (b0 === -1 || b1 === -1) {
|
4262 | return -1;
|
4263 | }
|
4264 |
|
4265 | return (b0 << 8) + b1;
|
4266 | }
|
4267 |
|
4268 | getInt32() {
|
4269 | const b0 = this.getByte();
|
4270 | const b1 = this.getByte();
|
4271 | const b2 = this.getByte();
|
4272 | const b3 = this.getByte();
|
4273 | return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3;
|
4274 | }
|
4275 |
|
4276 | getByteRange(begin, end) {
|
4277 | (0, _util.unreachable)("Abstract method `getByteRange` called");
|
4278 | }
|
4279 |
|
4280 | getString(length) {
|
4281 | return (0, _util.bytesToString)(this.getBytes(length));
|
4282 | }
|
4283 |
|
4284 | skip(n) {
|
4285 | this.pos += n || 1;
|
4286 | }
|
4287 |
|
4288 | reset() {
|
4289 | (0, _util.unreachable)("Abstract method `reset` called");
|
4290 | }
|
4291 |
|
4292 | moveStart() {
|
4293 | (0, _util.unreachable)("Abstract method `moveStart` called");
|
4294 | }
|
4295 |
|
4296 | makeSubStream(start, length, dict = null) {
|
4297 | (0, _util.unreachable)("Abstract method `makeSubStream` called");
|
4298 | }
|
4299 |
|
4300 | getBaseStreams() {
|
4301 | return null;
|
4302 | }
|
4303 |
|
4304 | }
|
4305 |
|
4306 | exports.BaseStream = BaseStream;
|
4307 |
|
4308 | }),
|
4309 |
|
4310 | ((__unused_webpack_module, exports) => {
|
4311 |
|
4312 |
|
4313 |
|
4314 | Object.defineProperty(exports, "__esModule", ({
|
4315 | value: true
|
4316 | }));
|
4317 | exports.ArithmeticDecoder = void 0;
|
4318 | const QeTable = [{
|
4319 | qe: 0x5601,
|
4320 | nmps: 1,
|
4321 | nlps: 1,
|
4322 | switchFlag: 1
|
4323 | }, {
|
4324 | qe: 0x3401,
|
4325 | nmps: 2,
|
4326 | nlps: 6,
|
4327 | switchFlag: 0
|
4328 | }, {
|
4329 | qe: 0x1801,
|
4330 | nmps: 3,
|
4331 | nlps: 9,
|
4332 | switchFlag: 0
|
4333 | }, {
|
4334 | qe: 0x0ac1,
|
4335 | nmps: 4,
|
4336 | nlps: 12,
|
4337 | switchFlag: 0
|
4338 | }, {
|
4339 | qe: 0x0521,
|
4340 | nmps: 5,
|
4341 | nlps: 29,
|
4342 | switchFlag: 0
|
4343 | }, {
|
4344 | qe: 0x0221,
|
4345 | nmps: 38,
|
4346 | nlps: 33,
|
4347 | switchFlag: 0
|
4348 | }, {
|
4349 | qe: 0x5601,
|
4350 | nmps: 7,
|
4351 | nlps: 6,
|
4352 | switchFlag: 1
|
4353 | }, {
|
4354 | qe: 0x5401,
|
4355 | nmps: 8,
|
4356 | nlps: 14,
|
4357 | switchFlag: 0
|
4358 | }, {
|
4359 | qe: 0x4801,
|
4360 | nmps: 9,
|
4361 | nlps: 14,
|
4362 | switchFlag: 0
|
4363 | }, {
|
4364 | qe: 0x3801,
|
4365 | nmps: 10,
|
4366 | nlps: 14,
|
4367 | switchFlag: 0
|
4368 | }, {
|
4369 | qe: 0x3001,
|
4370 | nmps: 11,
|
4371 | nlps: 17,
|
4372 | switchFlag: 0
|
4373 | }, {
|
4374 | qe: 0x2401,
|
4375 | nmps: 12,
|
4376 | nlps: 18,
|
4377 | switchFlag: 0
|
4378 | }, {
|
4379 | qe: 0x1c01,
|
4380 | nmps: 13,
|
4381 | nlps: 20,
|
4382 | switchFlag: 0
|
4383 | }, {
|
4384 | qe: 0x1601,
|
4385 | nmps: 29,
|
4386 | nlps: 21,
|
4387 | switchFlag: 0
|
4388 | }, {
|
4389 | qe: 0x5601,
|
4390 | nmps: 15,
|
4391 | nlps: 14,
|
4392 | switchFlag: 1
|
4393 | }, {
|
4394 | qe: 0x5401,
|
4395 | nmps: 16,
|
4396 | nlps: 14,
|
4397 | switchFlag: 0
|
4398 | }, {
|
4399 | qe: 0x5101,
|
4400 | nmps: 17,
|
4401 | nlps: 15,
|
4402 | switchFlag: 0
|
4403 | }, {
|
4404 | qe: 0x4801,
|
4405 | nmps: 18,
|
4406 | nlps: 16,
|
4407 | switchFlag: 0
|
4408 | }, {
|
4409 | qe: 0x3801,
|
4410 | nmps: 19,
|
4411 | nlps: 17,
|
4412 | switchFlag: 0
|
4413 | }, {
|
4414 | qe: 0x3401,
|
4415 | nmps: 20,
|
4416 | nlps: 18,
|
4417 | switchFlag: 0
|
4418 | }, {
|
4419 | qe: 0x3001,
|
4420 | nmps: 21,
|
4421 | nlps: 19,
|
4422 | switchFlag: 0
|
4423 | }, {
|
4424 | qe: 0x2801,
|
4425 | nmps: 22,
|
4426 | nlps: 19,
|
4427 | switchFlag: 0
|
4428 | }, {
|
4429 | qe: 0x2401,
|
4430 | nmps: 23,
|
4431 | nlps: 20,
|
4432 | switchFlag: 0
|
4433 | }, {
|
4434 | qe: 0x2201,
|
4435 | nmps: 24,
|
4436 | nlps: 21,
|
4437 | switchFlag: 0
|
4438 | }, {
|
4439 | qe: 0x1c01,
|
4440 | nmps: 25,
|
4441 | nlps: 22,
|
4442 | switchFlag: 0
|
4443 | }, {
|
4444 | qe: 0x1801,
|
4445 | nmps: 26,
|
4446 | nlps: 23,
|
4447 | switchFlag: 0
|
4448 | }, {
|
4449 | qe: 0x1601,
|
4450 | nmps: 27,
|
4451 | nlps: 24,
|
4452 | switchFlag: 0
|
4453 | }, {
|
4454 | qe: 0x1401,
|
4455 | nmps: 28,
|
4456 | nlps: 25,
|
4457 | switchFlag: 0
|
4458 | }, {
|
4459 | qe: 0x1201,
|
4460 | nmps: 29,
|
4461 | nlps: 26,
|
4462 | switchFlag: 0
|
4463 | }, {
|
4464 | qe: 0x1101,
|
4465 | nmps: 30,
|
4466 | nlps: 27,
|
4467 | switchFlag: 0
|
4468 | }, {
|
4469 | qe: 0x0ac1,
|
4470 | nmps: 31,
|
4471 | nlps: 28,
|
4472 | switchFlag: 0
|
4473 | }, {
|
4474 | qe: 0x09c1,
|
4475 | nmps: 32,
|
4476 | nlps: 29,
|
4477 | switchFlag: 0
|
4478 | }, {
|
4479 | qe: 0x08a1,
|
4480 | nmps: 33,
|
4481 | nlps: 30,
|
4482 | switchFlag: 0
|
4483 | }, {
|
4484 | qe: 0x0521,
|
4485 | nmps: 34,
|
4486 | nlps: 31,
|
4487 | switchFlag: 0
|
4488 | }, {
|
4489 | qe: 0x0441,
|
4490 | nmps: 35,
|
4491 | nlps: 32,
|
4492 | switchFlag: 0
|
4493 | }, {
|
4494 | qe: 0x02a1,
|
4495 | nmps: 36,
|
4496 | nlps: 33,
|
4497 | switchFlag: 0
|
4498 | }, {
|
4499 | qe: 0x0221,
|
4500 | nmps: 37,
|
4501 | nlps: 34,
|
4502 | switchFlag: 0
|
4503 | }, {
|
4504 | qe: 0x0141,
|
4505 | nmps: 38,
|
4506 | nlps: 35,
|
4507 | switchFlag: 0
|
4508 | }, {
|
4509 | qe: 0x0111,
|
4510 | nmps: 39,
|
4511 | nlps: 36,
|
4512 | switchFlag: 0
|
4513 | }, {
|
4514 | qe: 0x0085,
|
4515 | nmps: 40,
|
4516 | nlps: 37,
|
4517 | switchFlag: 0
|
4518 | }, {
|
4519 | qe: 0x0049,
|
4520 | nmps: 41,
|
4521 | nlps: 38,
|
4522 | switchFlag: 0
|
4523 | }, {
|
4524 | qe: 0x0025,
|
4525 | nmps: 42,
|
4526 | nlps: 39,
|
4527 | switchFlag: 0
|
4528 | }, {
|
4529 | qe: 0x0015,
|
4530 | nmps: 43,
|
4531 | nlps: 40,
|
4532 | switchFlag: 0
|
4533 | }, {
|
4534 | qe: 0x0009,
|
4535 | nmps: 44,
|
4536 | nlps: 41,
|
4537 | switchFlag: 0
|
4538 | }, {
|
4539 | qe: 0x0005,
|
4540 | nmps: 45,
|
4541 | nlps: 42,
|
4542 | switchFlag: 0
|
4543 | }, {
|
4544 | qe: 0x0001,
|
4545 | nmps: 45,
|
4546 | nlps: 43,
|
4547 | switchFlag: 0
|
4548 | }, {
|
4549 | qe: 0x5601,
|
4550 | nmps: 46,
|
4551 | nlps: 46,
|
4552 | switchFlag: 0
|
4553 | }];
|
4554 |
|
4555 | class ArithmeticDecoder {
|
4556 | constructor(data, start, end) {
|
4557 | this.data = data;
|
4558 | this.bp = start;
|
4559 | this.dataEnd = end;
|
4560 | this.chigh = data[start];
|
4561 | this.clow = 0;
|
4562 | this.byteIn();
|
4563 | this.chigh = this.chigh << 7 & 0xffff | this.clow >> 9 & 0x7f;
|
4564 | this.clow = this.clow << 7 & 0xffff;
|
4565 | this.ct -= 7;
|
4566 | this.a = 0x8000;
|
4567 | }
|
4568 |
|
4569 | byteIn() {
|
4570 | const data = this.data;
|
4571 | let bp = this.bp;
|
4572 |
|
4573 | if (data[bp] === 0xff) {
|
4574 | if (data[bp + 1] > 0x8f) {
|
4575 | this.clow += 0xff00;
|
4576 | this.ct = 8;
|
4577 | } else {
|
4578 | bp++;
|
4579 | this.clow += data[bp] << 9;
|
4580 | this.ct = 7;
|
4581 | this.bp = bp;
|
4582 | }
|
4583 | } else {
|
4584 | bp++;
|
4585 | this.clow += bp < this.dataEnd ? data[bp] << 8 : 0xff00;
|
4586 | this.ct = 8;
|
4587 | this.bp = bp;
|
4588 | }
|
4589 |
|
4590 | if (this.clow > 0xffff) {
|
4591 | this.chigh += this.clow >> 16;
|
4592 | this.clow &= 0xffff;
|
4593 | }
|
4594 | }
|
4595 |
|
4596 | readBit(contexts, pos) {
|
4597 | let cx_index = contexts[pos] >> 1,
|
4598 | cx_mps = contexts[pos] & 1;
|
4599 | const qeTableIcx = QeTable[cx_index];
|
4600 | const qeIcx = qeTableIcx.qe;
|
4601 | let d;
|
4602 | let a = this.a - qeIcx;
|
4603 |
|
4604 | if (this.chigh < qeIcx) {
|
4605 | if (a < qeIcx) {
|
4606 | a = qeIcx;
|
4607 | d = cx_mps;
|
4608 | cx_index = qeTableIcx.nmps;
|
4609 | } else {
|
4610 | a = qeIcx;
|
4611 | d = 1 ^ cx_mps;
|
4612 |
|
4613 | if (qeTableIcx.switchFlag === 1) {
|
4614 | cx_mps = d;
|
4615 | }
|
4616 |
|
4617 | cx_index = qeTableIcx.nlps;
|
4618 | }
|
4619 | } else {
|
4620 | this.chigh -= qeIcx;
|
4621 |
|
4622 | if ((a & 0x8000) !== 0) {
|
4623 | this.a = a;
|
4624 | return cx_mps;
|
4625 | }
|
4626 |
|
4627 | if (a < qeIcx) {
|
4628 | d = 1 ^ cx_mps;
|
4629 |
|
4630 | if (qeTableIcx.switchFlag === 1) {
|
4631 | cx_mps = d;
|
4632 | }
|
4633 |
|
4634 | cx_index = qeTableIcx.nlps;
|
4635 | } else {
|
4636 | d = cx_mps;
|
4637 | cx_index = qeTableIcx.nmps;
|
4638 | }
|
4639 | }
|
4640 |
|
4641 | do {
|
4642 | if (this.ct === 0) {
|
4643 | this.byteIn();
|
4644 | }
|
4645 |
|
4646 | a <<= 1;
|
4647 | this.chigh = this.chigh << 1 & 0xffff | this.clow >> 15 & 1;
|
4648 | this.clow = this.clow << 1 & 0xffff;
|
4649 | this.ct--;
|
4650 | } while ((a & 0x8000) === 0);
|
4651 |
|
4652 | this.a = a;
|
4653 | contexts[pos] = cx_index << 1 | cx_mps;
|
4654 | return d;
|
4655 | }
|
4656 |
|
4657 | }
|
4658 |
|
4659 | exports.ArithmeticDecoder = ArithmeticDecoder;
|
4660 |
|
4661 | }),
|
4662 |
|
4663 | ((__unused_webpack_module, exports, __w_pdfjs_require__) => {
|
4664 |
|
4665 |
|
4666 |
|
4667 | Object.defineProperty(exports, "__esModule", ({
|
4668 | value: true
|
4669 | }));
|
4670 | exports.CCITTFaxDecoder = void 0;
|
4671 |
|
4672 | var _util = __w_pdfjs_require__(1);
|
4673 |
|
4674 | const ccittEOL = -2;
|
4675 | const ccittEOF = -1;
|
4676 | const twoDimPass = 0;
|
4677 | const twoDimHoriz = 1;
|
4678 | const twoDimVert0 = 2;
|
4679 | const twoDimVertR1 = 3;
|
4680 | const twoDimVertL1 = 4;
|
4681 | const twoDimVertR2 = 5;
|
4682 | const twoDimVertL2 = 6;
|
4683 | const twoDimVertR3 = 7;
|
4684 | const twoDimVertL3 = 8;
|
4685 | 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]];
|
4686 | 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]];
|
4687 | 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]];
|
4688 | 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]];
|
4689 | 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]];
|
4690 | 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]];
|
4691 |
|
4692 | class CCITTFaxDecoder {
|
4693 | constructor(source, options = {}) {
|
4694 | if (!source || typeof source.next !== "function") {
|
4695 | throw new Error('CCITTFaxDecoder - invalid "source" parameter.');
|
4696 | }
|
4697 |
|
4698 | this.source = source;
|
4699 | this.eof = false;
|
4700 | this.encoding = options.K || 0;
|
4701 | this.eoline = options.EndOfLine || false;
|
4702 | this.byteAlign = options.EncodedByteAlign || false;
|
4703 | this.columns = options.Columns || 1728;
|
4704 | this.rows = options.Rows || 0;
|
4705 | let eoblock = options.EndOfBlock;
|
4706 |
|
4707 | if (eoblock === null || eoblock === undefined) {
|
4708 | eoblock = true;
|
4709 | }
|
4710 |
|
4711 | this.eoblock = eoblock;
|
4712 | this.black = options.BlackIs1 || false;
|
4713 | this.codingLine = new Uint32Array(this.columns + 1);
|
4714 | this.refLine = new Uint32Array(this.columns + 2);
|
4715 | this.codingLine[0] = this.columns;
|
4716 | this.codingPos = 0;
|
4717 | this.row = 0;
|
4718 | this.nextLine2D = this.encoding < 0;
|
4719 | this.inputBits = 0;
|
4720 | this.inputBuf = 0;
|
4721 | this.outputBits = 0;
|
4722 | this.rowsDone = false;
|
4723 | let code1;
|
4724 |
|
4725 | while ((code1 = this._lookBits(12)) === 0) {
|
4726 | this._eatBits(1);
|
4727 | }
|
4728 |
|
4729 | if (code1 === 1) {
|
4730 | this._eatBits(12);
|
4731 | }
|
4732 |
|
4733 | if (this.encoding > 0) {
|
4734 | this.nextLine2D = !this._lookBits(1);
|
4735 |
|
4736 | this._eatBits(1);
|
4737 | }
|
4738 | }
|
4739 |
|
4740 | readNextChar() {
|
4741 | if (this.eof) {
|
4742 | return -1;
|
4743 | }
|
4744 |
|
4745 | const refLine = this.refLine;
|
4746 | const codingLine = this.codingLine;
|
4747 | const columns = this.columns;
|
4748 | let refPos, blackPixels, bits, i;
|
4749 |
|
4750 | if (this.outputBits === 0) {
|
4751 | if (this.rowsDone) {
|
4752 | this.eof = true;
|
4753 | }
|
4754 |
|
4755 | if (this.eof) {
|
4756 | return -1;
|
4757 | }
|
4758 |
|
4759 | this.err = false;
|
4760 | let code1, code2, code3;
|
4761 |
|
4762 | if (this.nextLine2D) {
|
4763 | for (i = 0; codingLine[i] < columns; ++i) {
|
4764 | refLine[i] = codingLine[i];
|
4765 | }
|
4766 |
|
4767 | refLine[i++] = columns;
|
4768 | refLine[i] = columns;
|
4769 | codingLine[0] = 0;
|
4770 | this.codingPos = 0;
|
4771 | refPos = 0;
|
4772 | blackPixels = 0;
|
4773 |
|
4774 | while (codingLine[this.codingPos] < columns) {
|
4775 | code1 = this._getTwoDimCode();
|
4776 |
|
4777 | switch (code1) {
|
4778 | case twoDimPass:
|
4779 | this._addPixels(refLine[refPos + 1], blackPixels);
|
4780 |
|
4781 | if (refLine[refPos + 1] < columns) {
|
4782 | refPos += 2;
|
4783 | }
|
4784 |
|
4785 | break;
|
4786 |
|
4787 | case twoDimHoriz:
|
4788 | code1 = code2 = 0;
|
4789 |
|
4790 | if (blackPixels) {
|
4791 | do {
|
4792 | code1 += code3 = this._getBlackCode();
|
4793 | } while (code3 >= 64);
|
4794 |
|
4795 | do {
|
4796 | code2 += code3 = this._getWhiteCode();
|
4797 | } while (code3 >= 64);
|
4798 | } else {
|
4799 | do {
|
4800 | code1 += code3 = this._getWhiteCode();
|
4801 | } while (code3 >= 64);
|
4802 |
|
4803 | do {
|
4804 | code2 += code3 = this._getBlackCode();
|
4805 | } while (code3 >= 64);
|
4806 | }
|
4807 |
|
4808 | this._addPixels(codingLine[this.codingPos] + code1, blackPixels);
|
4809 |
|
4810 | if (codingLine[this.codingPos] < columns) {
|
4811 | this._addPixels(codingLine[this.codingPos] + code2, blackPixels ^ 1);
|
4812 | }
|
4813 |
|
4814 | while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
4815 | refPos += 2;
|
4816 | }
|
4817 |
|
4818 | break;
|
4819 |
|
4820 | case twoDimVertR3:
|
4821 | this._addPixels(refLine[refPos] + 3, blackPixels);
|
4822 |
|
4823 | blackPixels ^= 1;
|
4824 |
|
4825 | if (codingLine[this.codingPos] < columns) {
|
4826 | ++refPos;
|
4827 |
|
4828 | while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
4829 | refPos += 2;
|
4830 | }
|
4831 | }
|
4832 |
|
4833 | break;
|
4834 |
|
4835 | case twoDimVertR2:
|
4836 | this._addPixels(refLine[refPos] + 2, blackPixels);
|
4837 |
|
4838 | blackPixels ^= 1;
|
4839 |
|
4840 | if (codingLine[this.codingPos] < columns) {
|
4841 | ++refPos;
|
4842 |
|
4843 | while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
4844 | refPos += 2;
|
4845 | }
|
4846 | }
|
4847 |
|
4848 | break;
|
4849 |
|
4850 | case twoDimVertR1:
|
4851 | this._addPixels(refLine[refPos] + 1, blackPixels);
|
4852 |
|
4853 | blackPixels ^= 1;
|
4854 |
|
4855 | if (codingLine[this.codingPos] < columns) {
|
4856 | ++refPos;
|
4857 |
|
4858 | while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
4859 | refPos += 2;
|
4860 | }
|
4861 | }
|
4862 |
|
4863 | break;
|
4864 |
|
4865 | case twoDimVert0:
|
4866 | this._addPixels(refLine[refPos], blackPixels);
|
4867 |
|
4868 | blackPixels ^= 1;
|
4869 |
|
4870 | if (codingLine[this.codingPos] < columns) {
|
4871 | ++refPos;
|
4872 |
|
4873 | while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
4874 | refPos += 2;
|
4875 | }
|
4876 | }
|
4877 |
|
4878 | break;
|
4879 |
|
4880 | case twoDimVertL3:
|
4881 | this._addPixelsNeg(refLine[refPos] - 3, blackPixels);
|
4882 |
|
4883 | blackPixels ^= 1;
|
4884 |
|
4885 | if (codingLine[this.codingPos] < columns) {
|
4886 | if (refPos > 0) {
|
4887 | --refPos;
|
4888 | } else {
|
4889 | ++refPos;
|
4890 | }
|
4891 |
|
4892 | while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
4893 | refPos += 2;
|
4894 | }
|
4895 | }
|
4896 |
|
4897 | break;
|
4898 |
|
4899 | case twoDimVertL2:
|
4900 | this._addPixelsNeg(refLine[refPos] - 2, blackPixels);
|
4901 |
|
4902 | blackPixels ^= 1;
|
4903 |
|
4904 | if (codingLine[this.codingPos] < columns) {
|
4905 | if (refPos > 0) {
|
4906 | --refPos;
|
4907 | } else {
|
4908 | ++refPos;
|
4909 | }
|
4910 |
|
4911 | while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
4912 | refPos += 2;
|
4913 | }
|
4914 | }
|
4915 |
|
4916 | break;
|
4917 |
|
4918 | case twoDimVertL1:
|
4919 | this._addPixelsNeg(refLine[refPos] - 1, blackPixels);
|
4920 |
|
4921 | blackPixels ^= 1;
|
4922 |
|
4923 | if (codingLine[this.codingPos] < columns) {
|
4924 | if (refPos > 0) {
|
4925 | --refPos;
|
4926 | } else {
|
4927 | ++refPos;
|
4928 | }
|
4929 |
|
4930 | while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
4931 | refPos += 2;
|
4932 | }
|
4933 | }
|
4934 |
|
4935 | break;
|
4936 |
|
4937 | case ccittEOF:
|
4938 | this._addPixels(columns, 0);
|
4939 |
|
4940 | this.eof = true;
|
4941 | break;
|
4942 |
|
4943 | default:
|
4944 | (0, _util.info)("bad 2d code");
|
4945 |
|
4946 | this._addPixels(columns, 0);
|
4947 |
|
4948 | this.err = true;
|
4949 | }
|
4950 | }
|
4951 | } else {
|
4952 | codingLine[0] = 0;
|
4953 | this.codingPos = 0;
|
4954 | blackPixels = 0;
|
4955 |
|
4956 | while (codingLine[this.codingPos] < columns) {
|
4957 | code1 = 0;
|
4958 |
|
4959 | if (blackPixels) {
|
4960 | do {
|
4961 | code1 += code3 = this._getBlackCode();
|
4962 | } while (code3 >= 64);
|
4963 | } else {
|
4964 | do {
|
4965 | code1 += code3 = this._getWhiteCode();
|
4966 | } while (code3 >= 64);
|
4967 | }
|
4968 |
|
4969 | this._addPixels(codingLine[this.codingPos] + code1, blackPixels);
|
4970 |
|
4971 | blackPixels ^= 1;
|
4972 | }
|
4973 | }
|
4974 |
|
4975 | let gotEOL = false;
|
4976 |
|
4977 | if (this.byteAlign) {
|
4978 | this.inputBits &= ~7;
|
4979 | }
|
4980 |
|
4981 | if (!this.eoblock && this.row === this.rows - 1) {
|
4982 | this.rowsDone = true;
|
4983 | } else {
|
4984 | code1 = this._lookBits(12);
|
4985 |
|
4986 | if (this.eoline) {
|
4987 | while (code1 !== ccittEOF && code1 !== 1) {
|
4988 | this._eatBits(1);
|
4989 |
|
4990 | code1 = this._lookBits(12);
|
4991 | }
|
4992 | } else {
|
4993 | while (code1 === 0) {
|
4994 | this._eatBits(1);
|
4995 |
|
4996 | code1 = this._lookBits(12);
|
4997 | }
|
4998 | }
|
4999 |
|
5000 | if (code1 === 1) {
|
5001 | this._eatBits(12);
|
5002 |
|
5003 | gotEOL = true;
|
5004 | } else if (code1 === ccittEOF) {
|
5005 | this.eof = true;
|
5006 | }
|
5007 | }
|
5008 |
|
5009 | if (!this.eof && this.encoding > 0 && !this.rowsDone) {
|
5010 | this.nextLine2D = !this._lookBits(1);
|
5011 |
|
5012 | this._eatBits(1);
|
5013 | }
|
5014 |
|
5015 | if (this.eoblock && gotEOL && this.byteAlign) {
|
5016 | code1 = this._lookBits(12);
|
5017 |
|
5018 | if (code1 === 1) {
|
5019 | this._eatBits(12);
|
5020 |
|
5021 | if (this.encoding > 0) {
|
5022 | this._lookBits(1);
|
5023 |
|
5024 | this._eatBits(1);
|
5025 | }
|
5026 |
|
5027 | if (this.encoding >= 0) {
|
5028 | for (i = 0; i < 4; ++i) {
|
5029 | code1 = this._lookBits(12);
|
5030 |
|
5031 | if (code1 !== 1) {
|
5032 | (0, _util.info)("bad rtc code: " + code1);
|
5033 | }
|
5034 |
|
5035 | this._eatBits(12);
|
5036 |
|
5037 | if (this.encoding > 0) {
|
5038 | this._lookBits(1);
|
5039 |
|
5040 | this._eatBits(1);
|
5041 | }
|
5042 | }
|
5043 | }
|
5044 |
|
5045 | this.eof = true;
|
5046 | }
|
5047 | } else if (this.err && this.eoline) {
|
5048 | while (true) {
|
5049 | code1 = this._lookBits(13);
|
5050 |
|
5051 | if (code1 === ccittEOF) {
|
5052 | this.eof = true;
|
5053 | return -1;
|
5054 | }
|
5055 |
|
5056 | if (code1 >> 1 === 1) {
|
5057 | break;
|
5058 | }
|
5059 |
|
5060 | this._eatBits(1);
|
5061 | }
|
5062 |
|
5063 | this._eatBits(12);
|
5064 |
|
5065 | if (this.encoding > 0) {
|
5066 | this._eatBits(1);
|
5067 |
|
5068 | this.nextLine2D = !(code1 & 1);
|
5069 | }
|
5070 | }
|
5071 |
|
5072 | if (codingLine[0] > 0) {
|
5073 | this.outputBits = codingLine[this.codingPos = 0];
|
5074 | } else {
|
5075 | this.outputBits = codingLine[this.codingPos = 1];
|
5076 | }
|
5077 |
|
5078 | this.row++;
|
5079 | }
|
5080 |
|
5081 | let c;
|
5082 |
|
5083 | if (this.outputBits >= 8) {
|
5084 | c = this.codingPos & 1 ? 0 : 0xff;
|
5085 | this.outputBits -= 8;
|
5086 |
|
5087 | if (this.outputBits === 0 && codingLine[this.codingPos] < columns) {
|
5088 | this.codingPos++;
|
5089 | this.outputBits = codingLine[this.codingPos] - codingLine[this.codingPos - 1];
|
5090 | }
|
5091 | } else {
|
5092 | bits = 8;
|
5093 | c = 0;
|
5094 |
|
5095 | do {
|
5096 | if (typeof this.outputBits !== "number") {
|
5097 | throw new _util.FormatError('Invalid /CCITTFaxDecode data, "outputBits" must be a number.');
|
5098 | }
|
5099 |
|
5100 | if (this.outputBits > bits) {
|
5101 | c <<= bits;
|
5102 |
|
5103 | if (!(this.codingPos & 1)) {
|
5104 | c |= 0xff >> 8 - bits;
|
5105 | }
|
5106 |
|
5107 | this.outputBits -= bits;
|
5108 | bits = 0;
|
5109 | } else {
|
5110 | c <<= this.outputBits;
|
5111 |
|
5112 | if (!(this.codingPos & 1)) {
|
5113 | c |= 0xff >> 8 - this.outputBits;
|
5114 | }
|
5115 |
|
5116 | bits -= this.outputBits;
|
5117 | this.outputBits = 0;
|
5118 |
|
5119 | if (codingLine[this.codingPos] < columns) {
|
5120 | this.codingPos++;
|
5121 | this.outputBits = codingLine[this.codingPos] - codingLine[this.codingPos - 1];
|
5122 | } else if (bits > 0) {
|
5123 | c <<= bits;
|
5124 | bits = 0;
|
5125 | }
|
5126 | }
|
5127 | } while (bits);
|
5128 | }
|
5129 |
|
5130 | if (this.black) {
|
5131 | c ^= 0xff;
|
5132 | }
|
5133 |
|
5134 | return c;
|
5135 | }
|
5136 |
|
5137 | _addPixels(a1, blackPixels) {
|
5138 | const codingLine = this.codingLine;
|
5139 | let codingPos = this.codingPos;
|
5140 |
|
5141 | if (a1 > codingLine[codingPos]) {
|
5142 | if (a1 > this.columns) {
|
5143 | (0, _util.info)("row is wrong length");
|
5144 | this.err = true;
|
5145 | a1 = this.columns;
|
5146 | }
|
5147 |
|
5148 | if (codingPos & 1 ^ blackPixels) {
|
5149 | ++codingPos;
|
5150 | }
|
5151 |
|
5152 | codingLine[codingPos] = a1;
|
5153 | }
|
5154 |
|
5155 | this.codingPos = codingPos;
|
5156 | }
|
5157 |
|
5158 | _addPixelsNeg(a1, blackPixels) {
|
5159 | const codingLine = this.codingLine;
|
5160 | let codingPos = this.codingPos;
|
5161 |
|
5162 | if (a1 > codingLine[codingPos]) {
|
5163 | if (a1 > this.columns) {
|
5164 | (0, _util.info)("row is wrong length");
|
5165 | this.err = true;
|
5166 | a1 = this.columns;
|
5167 | }
|
5168 |
|
5169 | if (codingPos & 1 ^ blackPixels) {
|
5170 | ++codingPos;
|
5171 | }
|
5172 |
|
5173 | codingLine[codingPos] = a1;
|
5174 | } else if (a1 < codingLine[codingPos]) {
|
5175 | if (a1 < 0) {
|
5176 | (0, _util.info)("invalid code");
|
5177 | this.err = true;
|
5178 | a1 = 0;
|
5179 | }
|
5180 |
|
5181 | while (codingPos > 0 && a1 < codingLine[codingPos - 1]) {
|
5182 | --codingPos;
|
5183 | }
|
5184 |
|
5185 | codingLine[codingPos] = a1;
|
5186 | }
|
5187 |
|
5188 | this.codingPos = codingPos;
|
5189 | }
|
5190 |
|
5191 | _findTableCode(start, end, table, limit) {
|
5192 | const limitValue = limit || 0;
|
5193 |
|
5194 | for (let i = start; i <= end; ++i) {
|
5195 | let code = this._lookBits(i);
|
5196 |
|
5197 | if (code === ccittEOF) {
|
5198 | return [true, 1, false];
|
5199 | }
|
5200 |
|
5201 | if (i < end) {
|
5202 | code <<= end - i;
|
5203 | }
|
5204 |
|
5205 | if (!limitValue || code >= limitValue) {
|
5206 | const p = table[code - limitValue];
|
5207 |
|
5208 | if (p[0] === i) {
|
5209 | this._eatBits(i);
|
5210 |
|
5211 | return [true, p[1], true];
|
5212 | }
|
5213 | }
|
5214 | }
|
5215 |
|
5216 | return [false, 0, false];
|
5217 | }
|
5218 |
|
5219 | _getTwoDimCode() {
|
5220 | let code = 0;
|
5221 | let p;
|
5222 |
|
5223 | if (this.eoblock) {
|
5224 | code = this._lookBits(7);
|
5225 | p = twoDimTable[code];
|
5226 |
|
5227 | if (p && p[0] > 0) {
|
5228 | this._eatBits(p[0]);
|
5229 |
|
5230 | return p[1];
|
5231 | }
|
5232 | } else {
|
5233 | const result = this._findTableCode(1, 7, twoDimTable);
|
5234 |
|
5235 | if (result[0] && result[2]) {
|
5236 | return result[1];
|
5237 | }
|
5238 | }
|
5239 |
|
5240 | (0, _util.info)("Bad two dim code");
|
5241 | return ccittEOF;
|
5242 | }
|
5243 |
|
5244 | _getWhiteCode() {
|
5245 | let code = 0;
|
5246 | let p;
|
5247 |
|
5248 | if (this.eoblock) {
|
5249 | code = this._lookBits(12);
|
5250 |
|
5251 | if (code === ccittEOF) {
|
5252 | return 1;
|
5253 | }
|
5254 |
|
5255 | if (code >> 5 === 0) {
|
5256 | p = whiteTable1[code];
|
5257 | } else {
|
5258 | p = whiteTable2[code >> 3];
|
5259 | }
|
5260 |
|
5261 | if (p[0] > 0) {
|
5262 | this._eatBits(p[0]);
|
5263 |
|
5264 | return p[1];
|
5265 | }
|
5266 | } else {
|
5267 | let result = this._findTableCode(1, 9, whiteTable2);
|
5268 |
|
5269 | if (result[0]) {
|
5270 | return result[1];
|
5271 | }
|
5272 |
|
5273 | result = this._findTableCode(11, 12, whiteTable1);
|
5274 |
|
5275 | if (result[0]) {
|
5276 | return result[1];
|
5277 | }
|
5278 | }
|
5279 |
|
5280 | (0, _util.info)("bad white code");
|
5281 |
|
5282 | this._eatBits(1);
|
5283 |
|
5284 | return 1;
|
5285 | }
|
5286 |
|
5287 | _getBlackCode() {
|
5288 | let code, p;
|
5289 |
|
5290 | if (this.eoblock) {
|
5291 | code = this._lookBits(13);
|
5292 |
|
5293 | if (code === ccittEOF) {
|
5294 | return 1;
|
5295 | }
|
5296 |
|
5297 | if (code >> 7 === 0) {
|
5298 | p = blackTable1[code];
|
5299 | } else if (code >> 9 === 0 && code >> 7 !== 0) {
|
5300 | p = blackTable2[(code >> 1) - 64];
|
5301 | } else {
|
5302 | p = blackTable3[code >> 7];
|
5303 | }
|
5304 |
|
5305 | if (p[0] > 0) {
|
5306 | this._eatBits(p[0]);
|
5307 |
|
5308 | return p[1];
|
5309 | }
|
5310 | } else {
|
5311 | let result = this._findTableCode(2, 6, blackTable3);
|
5312 |
|
5313 | if (result[0]) {
|
5314 | return result[1];
|
5315 | }
|
5316 |
|
5317 | result = this._findTableCode(7, 12, blackTable2, 64);
|
5318 |
|
5319 | if (result[0]) {
|
5320 | return result[1];
|
5321 | }
|
5322 |
|
5323 | result = this._findTableCode(10, 13, blackTable1);
|
5324 |
|
5325 | if (result[0]) {
|
5326 | return result[1];
|
5327 | }
|
5328 | }
|
5329 |
|
5330 | (0, _util.info)("bad black code");
|
5331 |
|
5332 | this._eatBits(1);
|
5333 |
|
5334 | return 1;
|
5335 | }
|
5336 |
|
5337 | _lookBits(n) {
|
5338 | let c;
|
5339 |
|
5340 | while (this.inputBits < n) {
|
5341 | if ((c = this.source.next()) === -1) {
|
5342 | if (this.inputBits === 0) {
|
5343 | return ccittEOF;
|
5344 | }
|
5345 |
|
5346 | return this.inputBuf << n - this.inputBits & 0xffff >> 16 - n;
|
5347 | }
|
5348 |
|
5349 | this.inputBuf = this.inputBuf << 8 | c;
|
5350 | this.inputBits += 8;
|
5351 | }
|
5352 |
|
5353 | return this.inputBuf >> this.inputBits - n & 0xffff >> 16 - n;
|
5354 | }
|
5355 |
|
5356 | _eatBits(n) {
|
5357 | if ((this.inputBits -= n) < 0) {
|
5358 | this.inputBits = 0;
|
5359 | }
|
5360 | }
|
5361 |
|
5362 | }
|
5363 |
|
5364 | exports.CCITTFaxDecoder = CCITTFaxDecoder;
|
5365 |
|
5366 | }),
|
5367 |
|
5368 | ((__unused_webpack_module, exports, __w_pdfjs_require__) => {
|
5369 |
|
5370 |
|
5371 |
|
5372 | Object.defineProperty(exports, "__esModule", ({
|
5373 | value: true
|
5374 | }));
|
5375 | exports.JpegImage = void 0;
|
5376 |
|
5377 | var _util = __w_pdfjs_require__(1);
|
5378 |
|
5379 | var _core_utils = __w_pdfjs_require__(5);
|
5380 |
|
5381 | class JpegError extends _util.BaseException {
|
5382 | constructor(msg) {
|
5383 | super(`JPEG error: ${msg}`, "JpegError");
|
5384 | }
|
5385 |
|
5386 | }
|
5387 |
|
5388 | class DNLMarkerError extends _util.BaseException {
|
5389 | constructor(message, scanLines) {
|
5390 | super(message, "DNLMarkerError");
|
5391 | this.scanLines = scanLines;
|
5392 | }
|
5393 |
|
5394 | }
|
5395 |
|
5396 | class EOIMarkerError extends _util.BaseException {
|
5397 | constructor(msg) {
|
5398 | super(msg, "EOIMarkerError");
|
5399 | }
|
5400 |
|
5401 | }
|
5402 |
|
5403 | const 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]);
|
5404 | const dctCos1 = 4017;
|
5405 | const dctSin1 = 799;
|
5406 | const dctCos3 = 3406;
|
5407 | const dctSin3 = 2276;
|
5408 | const dctCos6 = 1567;
|
5409 | const dctSin6 = 3784;
|
5410 | const dctSqrt2 = 5793;
|
5411 | const dctSqrt1d2 = 2896;
|
5412 |
|
5413 | function buildHuffmanTable(codeLengths, values) {
|
5414 | let k = 0,
|
5415 | i,
|
5416 | j,
|
5417 | length = 16;
|
5418 |
|
5419 | while (length > 0 && !codeLengths[length - 1]) {
|
5420 | length--;
|
5421 | }
|
5422 |
|
5423 | const code = [{
|
5424 | children: [],
|
5425 | index: 0
|
5426 | }];
|
5427 | let p = code[0],
|
5428 | q;
|
5429 |
|
5430 | for (i = 0; i < length; i++) {
|
5431 | for (j = 0; j < codeLengths[i]; j++) {
|
5432 | p = code.pop();
|
5433 | p.children[p.index] = values[k];
|
5434 |
|
5435 | while (p.index > 0) {
|
5436 | p = code.pop();
|
5437 | }
|
5438 |
|
5439 | p.index++;
|
5440 | code.push(p);
|
5441 |
|
5442 | while (code.length <= i) {
|
5443 | code.push(q = {
|
5444 | children: [],
|
5445 | index: 0
|
5446 | });
|
5447 | p.children[p.index] = q.children;
|
5448 | p = q;
|
5449 | }
|
5450 |
|
5451 | k++;
|
5452 | }
|
5453 |
|
5454 | if (i + 1 < length) {
|
5455 | code.push(q = {
|
5456 | children: [],
|
5457 | index: 0
|
5458 | });
|
5459 | p.children[p.index] = q.children;
|
5460 | p = q;
|
5461 | }
|
5462 | }
|
5463 |
|
5464 | return code[0].children;
|
5465 | }
|
5466 |
|
5467 | function getBlockBufferOffset(component, row, col) {
|
5468 | return 64 * ((component.blocksPerLine + 1) * row + col);
|
5469 | }
|
5470 |
|
5471 | function decodeScan(data, offset, frame, components, resetInterval, spectralStart, spectralEnd, successivePrev, successive, parseDNLMarker = false) {
|
5472 | const mcusPerLine = frame.mcusPerLine;
|
5473 | const progressive = frame.progressive;
|
5474 | const startOffset = offset;
|
5475 | let bitsData = 0,
|
5476 | bitsCount = 0;
|
5477 |
|
5478 | function readBit() {
|
5479 | if (bitsCount > 0) {
|
5480 | bitsCount--;
|
5481 | return bitsData >> bitsCount & 1;
|
5482 | }
|
5483 |
|
5484 | bitsData = data[offset++];
|
5485 |
|
5486 | if (bitsData === 0xff) {
|
5487 | const nextByte = data[offset++];
|
5488 |
|
5489 | if (nextByte) {
|
5490 | if (nextByte === 0xdc && parseDNLMarker) {
|
5491 | offset += 2;
|
5492 | const scanLines = (0, _core_utils.readUint16)(data, offset);
|
5493 | offset += 2;
|
5494 |
|
5495 | if (scanLines > 0 && scanLines !== frame.scanLines) {
|
5496 | throw new DNLMarkerError("Found DNL marker (0xFFDC) while parsing scan data", scanLines);
|
5497 | }
|
5498 | } else if (nextByte === 0xd9) {
|
5499 | if (parseDNLMarker) {
|
5500 | const maybeScanLines = blockRow * (frame.precision === 8 ? 8 : 0);
|
5501 |
|
5502 | if (maybeScanLines > 0 && Math.round(frame.scanLines / maybeScanLines) >= 10) {
|
5503 | throw new DNLMarkerError("Found EOI marker (0xFFD9) while parsing scan data, " + "possibly caused by incorrect `scanLines` parameter", maybeScanLines);
|
5504 | }
|
5505 | }
|
5506 |
|
5507 | throw new EOIMarkerError("Found EOI marker (0xFFD9) while parsing scan data");
|
5508 | }
|
5509 |
|
5510 | throw new JpegError(`unexpected marker ${(bitsData << 8 | nextByte).toString(16)}`);
|
5511 | }
|
5512 | }
|
5513 |
|
5514 | bitsCount = 7;
|
5515 | return bitsData >>> 7;
|
5516 | }
|
5517 |
|
5518 | function decodeHuffman(tree) {
|
5519 | let node = tree;
|
5520 |
|
5521 | while (true) {
|
5522 | node = node[readBit()];
|
5523 |
|
5524 | switch (typeof node) {
|
5525 | case "number":
|
5526 | return node;
|
5527 |
|
5528 | case "object":
|
5529 | continue;
|
5530 | }
|
5531 |
|
5532 | throw new JpegError("invalid huffman sequence");
|
5533 | }
|
5534 | }
|
5535 |
|
5536 | function receive(length) {
|
5537 | let n = 0;
|
5538 |
|
5539 | while (length > 0) {
|
5540 | n = n << 1 | readBit();
|
5541 | length--;
|
5542 | }
|
5543 |
|
5544 | return n;
|
5545 | }
|
5546 |
|
5547 | function receiveAndExtend(length) {
|
5548 | if (length === 1) {
|
5549 | return readBit() === 1 ? 1 : -1;
|
5550 | }
|
5551 |
|
5552 | const n = receive(length);
|
5553 |
|
5554 | if (n >= 1 << length - 1) {
|
5555 | return n;
|
5556 | }
|
5557 |
|
5558 | return n + (-1 << length) + 1;
|
5559 | }
|
5560 |
|
5561 | function decodeBaseline(component, blockOffset) {
|
5562 | const t = decodeHuffman(component.huffmanTableDC);
|
5563 | const diff = t === 0 ? 0 : receiveAndExtend(t);
|
5564 | component.blockData[blockOffset] = component.pred += diff;
|
5565 | let k = 1;
|
5566 |
|
5567 | while (k < 64) {
|
5568 | const rs = decodeHuffman(component.huffmanTableAC);
|
5569 | const s = rs & 15,
|
5570 | r = rs >> 4;
|
5571 |
|
5572 | if (s === 0) {
|
5573 | if (r < 15) {
|
5574 | break;
|
5575 | }
|
5576 |
|
5577 | k += 16;
|
5578 | continue;
|
5579 | }
|
5580 |
|
5581 | k += r;
|
5582 | const z = dctZigZag[k];
|
5583 | component.blockData[blockOffset + z] = receiveAndExtend(s);
|
5584 | k++;
|
5585 | }
|
5586 | }
|
5587 |
|
5588 | function decodeDCFirst(component, blockOffset) {
|
5589 | const t = decodeHuffman(component.huffmanTableDC);
|
5590 | const diff = t === 0 ? 0 : receiveAndExtend(t) << successive;
|
5591 | component.blockData[blockOffset] = component.pred += diff;
|
5592 | }
|
5593 |
|
5594 | function decodeDCSuccessive(component, blockOffset) {
|
5595 | component.blockData[blockOffset] |= readBit() << successive;
|
5596 | }
|
5597 |
|
5598 | let eobrun = 0;
|
5599 |
|
5600 | function decodeACFirst(component, blockOffset) {
|
5601 | if (eobrun > 0) {
|
5602 | eobrun--;
|
5603 | return;
|
5604 | }
|
5605 |
|
5606 | let k = spectralStart;
|
5607 | const e = spectralEnd;
|
5608 |
|
5609 | while (k <= e) {
|
5610 | const rs = decodeHuffman(component.huffmanTableAC);
|
5611 | const s = rs & 15,
|
5612 | r = rs >> 4;
|
5613 |
|
5614 | if (s === 0) {
|
5615 | if (r < 15) {
|
5616 | eobrun = receive(r) + (1 << r) - 1;
|
5617 | break;
|
5618 | }
|
5619 |
|
5620 | k += 16;
|
5621 | continue;
|
5622 | }
|
5623 |
|
5624 | k += r;
|
5625 | const z = dctZigZag[k];
|
5626 | component.blockData[blockOffset + z] = receiveAndExtend(s) * (1 << successive);
|
5627 | k++;
|
5628 | }
|
5629 | }
|
5630 |
|
5631 | let successiveACState = 0,
|
5632 | successiveACNextValue;
|
5633 |
|
5634 | function decodeACSuccessive(component, blockOffset) {
|
5635 | let k = spectralStart;
|
5636 | const e = spectralEnd;
|
5637 | let r = 0;
|
5638 | let s;
|
5639 | let rs;
|
5640 |
|
5641 | while (k <= e) {
|
5642 | const offsetZ = blockOffset + dctZigZag[k];
|
5643 | const sign = component.blockData[offsetZ] < 0 ? -1 : 1;
|
5644 |
|
5645 | switch (successiveACState) {
|
5646 | case 0:
|
5647 | rs = decodeHuffman(component.huffmanTableAC);
|
5648 | s = rs & 15;
|
5649 | r = rs >> 4;
|
5650 |
|
5651 | if (s === 0) {
|
5652 | if (r < 15) {
|
5653 | eobrun = receive(r) + (1 << r);
|
5654 | successiveACState = 4;
|
5655 | } else {
|
5656 | r = 16;
|
5657 | successiveACState = 1;
|
5658 | }
|
5659 | } else {
|
5660 | if (s !== 1) {
|
5661 | throw new JpegError("invalid ACn encoding");
|
5662 | }
|
5663 |
|
5664 | successiveACNextValue = receiveAndExtend(s);
|
5665 | successiveACState = r ? 2 : 3;
|
5666 | }
|
5667 |
|
5668 | continue;
|
5669 |
|
5670 | case 1:
|
5671 | case 2:
|
5672 | if (component.blockData[offsetZ]) {
|
5673 | component.blockData[offsetZ] += sign * (readBit() << successive);
|
5674 | } else {
|
5675 | r--;
|
5676 |
|
5677 | if (r === 0) {
|
5678 | successiveACState = successiveACState === 2 ? 3 : 0;
|
5679 | }
|
5680 | }
|
5681 |
|
5682 | break;
|
5683 |
|
5684 | case 3:
|
5685 | if (component.blockData[offsetZ]) {
|
5686 | component.blockData[offsetZ] += sign * (readBit() << successive);
|
5687 | } else {
|
5688 | component.blockData[offsetZ] = successiveACNextValue << successive;
|
5689 | successiveACState = 0;
|
5690 | }
|
5691 |
|
5692 | break;
|
5693 |
|
5694 | case 4:
|
5695 | if (component.blockData[offsetZ]) {
|
5696 | component.blockData[offsetZ] += sign * (readBit() << successive);
|
5697 | }
|
5698 |
|
5699 | break;
|
5700 | }
|
5701 |
|
5702 | k++;
|
5703 | }
|
5704 |
|
5705 | if (successiveACState === 4) {
|
5706 | eobrun--;
|
5707 |
|
5708 | if (eobrun === 0) {
|
5709 | successiveACState = 0;
|
5710 | }
|
5711 | }
|
5712 | }
|
5713 |
|
5714 | let blockRow = 0;
|
5715 |
|
5716 | function decodeMcu(component, decode, mcu, row, col) {
|
5717 | const mcuRow = mcu / mcusPerLine | 0;
|
5718 | const mcuCol = mcu % mcusPerLine;
|
5719 | blockRow = mcuRow * component.v + row;
|
5720 | const blockCol = mcuCol * component.h + col;
|
5721 | const blockOffset = getBlockBufferOffset(component, blockRow, blockCol);
|
5722 | decode(component, blockOffset);
|
5723 | }
|
5724 |
|
5725 | function decodeBlock(component, decode, mcu) {
|
5726 | blockRow = mcu / component.blocksPerLine | 0;
|
5727 | const blockCol = mcu % component.blocksPerLine;
|
5728 | const blockOffset = getBlockBufferOffset(component, blockRow, blockCol);
|
5729 | decode(component, blockOffset);
|
5730 | }
|
5731 |
|
5732 | const componentsLength = components.length;
|
5733 | let component, i, j, k, n;
|
5734 | let decodeFn;
|
5735 |
|
5736 | if (progressive) {
|
5737 | if (spectralStart === 0) {
|
5738 | decodeFn = successivePrev === 0 ? decodeDCFirst : decodeDCSuccessive;
|
5739 | } else {
|
5740 | decodeFn = successivePrev === 0 ? decodeACFirst : decodeACSuccessive;
|
5741 | }
|
5742 | } else {
|
5743 | decodeFn = decodeBaseline;
|
5744 | }
|
5745 |
|
5746 | let mcu = 0,
|
5747 | fileMarker;
|
5748 | let mcuExpected;
|
5749 |
|
5750 | if (componentsLength === 1) {
|
5751 | mcuExpected = components[0].blocksPerLine * components[0].blocksPerColumn;
|
5752 | } else {
|
5753 | mcuExpected = mcusPerLine * frame.mcusPerColumn;
|
5754 | }
|
5755 |
|
5756 | let h, v;
|
5757 |
|
5758 | while (mcu <= mcuExpected) {
|
5759 | const mcuToRead = resetInterval ? Math.min(mcuExpected - mcu, resetInterval) : mcuExpected;
|
5760 |
|
5761 | if (mcuToRead > 0) {
|
5762 | for (i = 0; i < componentsLength; i++) {
|
5763 | components[i].pred = 0;
|
5764 | }
|
5765 |
|
5766 | eobrun = 0;
|
5767 |
|
5768 | if (componentsLength === 1) {
|
5769 | component = components[0];
|
5770 |
|
5771 | for (n = 0; n < mcuToRead; n++) {
|
5772 | decodeBlock(component, decodeFn, mcu);
|
5773 | mcu++;
|
5774 | }
|
5775 | } else {
|
5776 | for (n = 0; n < mcuToRead; n++) {
|
5777 | for (i = 0; i < componentsLength; i++) {
|
5778 | component = components[i];
|
5779 | h = component.h;
|
5780 | v = component.v;
|
5781 |
|
5782 | for (j = 0; j < v; j++) {
|
5783 | for (k = 0; k < h; k++) {
|
5784 | decodeMcu(component, decodeFn, mcu, j, k);
|
5785 | }
|
5786 | }
|
5787 | }
|
5788 |
|
5789 | mcu++;
|
5790 | }
|
5791 | }
|
5792 | }
|
5793 |
|
5794 | bitsCount = 0;
|
5795 | fileMarker = findNextFileMarker(data, offset);
|
5796 |
|
5797 | if (!fileMarker) {
|
5798 | break;
|
5799 | }
|
5800 |
|
5801 | if (fileMarker.invalid) {
|
5802 | const partialMsg = mcuToRead > 0 ? "unexpected" : "excessive";
|
5803 | (0, _util.warn)(`decodeScan - ${partialMsg} MCU data, current marker is: ${fileMarker.invalid}`);
|
5804 | offset = fileMarker.offset;
|
5805 | }
|
5806 |
|
5807 | if (fileMarker.marker >= 0xffd0 && fileMarker.marker <= 0xffd7) {
|
5808 | offset += 2;
|
5809 | } else {
|
5810 | break;
|
5811 | }
|
5812 | }
|
5813 |
|
5814 | return offset - startOffset;
|
5815 | }
|
5816 |
|
5817 | function quantizeAndInverse(component, blockBufferOffset, p) {
|
5818 | const qt = component.quantizationTable,
|
5819 | blockData = component.blockData;
|
5820 | let v0, v1, v2, v3, v4, v5, v6, v7;
|
5821 | let p0, p1, p2, p3, p4, p5, p6, p7;
|
5822 | let t;
|
5823 |
|
5824 | if (!qt) {
|
5825 | throw new JpegError("missing required Quantization Table.");
|
5826 | }
|
5827 |
|
5828 | for (let row = 0; row < 64; row += 8) {
|
5829 | p0 = blockData[blockBufferOffset + row];
|
5830 | p1 = blockData[blockBufferOffset + row + 1];
|
5831 | p2 = blockData[blockBufferOffset + row + 2];
|
5832 | p3 = blockData[blockBufferOffset + row + 3];
|
5833 | p4 = blockData[blockBufferOffset + row + 4];
|
5834 | p5 = blockData[blockBufferOffset + row + 5];
|
5835 | p6 = blockData[blockBufferOffset + row + 6];
|
5836 | p7 = blockData[blockBufferOffset + row + 7];
|
5837 | p0 *= qt[row];
|
5838 |
|
5839 | if ((p1 | p2 | p3 | p4 | p5 | p6 | p7) === 0) {
|
5840 | t = dctSqrt2 * p0 + 512 >> 10;
|
5841 | p[row] = t;
|
5842 | p[row + 1] = t;
|
5843 | p[row + 2] = t;
|
5844 | p[row + 3] = t;
|
5845 | p[row + 4] = t;
|
5846 | p[row + 5] = t;
|
5847 | p[row + 6] = t;
|
5848 | p[row + 7] = t;
|
5849 | continue;
|
5850 | }
|
5851 |
|
5852 | p1 *= qt[row + 1];
|
5853 | p2 *= qt[row + 2];
|
5854 | p3 *= qt[row + 3];
|
5855 | p4 *= qt[row + 4];
|
5856 | p5 *= qt[row + 5];
|
5857 | p6 *= qt[row + 6];
|
5858 | p7 *= qt[row + 7];
|
5859 | v0 = dctSqrt2 * p0 + 128 >> 8;
|
5860 | v1 = dctSqrt2 * p4 + 128 >> 8;
|
5861 | v2 = p2;
|
5862 | v3 = p6;
|
5863 | v4 = dctSqrt1d2 * (p1 - p7) + 128 >> 8;
|
5864 | v7 = dctSqrt1d2 * (p1 + p7) + 128 >> 8;
|
5865 | v5 = p3 << 4;
|
5866 | v6 = p5 << 4;
|
5867 | v0 = v0 + v1 + 1 >> 1;
|
5868 | v1 = v0 - v1;
|
5869 | t = v2 * dctSin6 + v3 * dctCos6 + 128 >> 8;
|
5870 | v2 = v2 * dctCos6 - v3 * dctSin6 + 128 >> 8;
|
5871 | v3 = t;
|
5872 | v4 = v4 + v6 + 1 >> 1;
|
5873 | v6 = v4 - v6;
|
5874 | v7 = v7 + v5 + 1 >> 1;
|
5875 | v5 = v7 - v5;
|
5876 | v0 = v0 + v3 + 1 >> 1;
|
5877 | v3 = v0 - v3;
|
5878 | v1 = v1 + v2 + 1 >> 1;
|
5879 | v2 = v1 - v2;
|
5880 | t = v4 * dctSin3 + v7 * dctCos3 + 2048 >> 12;
|
5881 | v4 = v4 * dctCos3 - v7 * dctSin3 + 2048 >> 12;
|
5882 | v7 = t;
|
5883 | t = v5 * dctSin1 + v6 * dctCos1 + 2048 >> 12;
|
5884 | v5 = v5 * dctCos1 - v6 * dctSin1 + 2048 >> 12;
|
5885 | v6 = t;
|
5886 | p[row] = v0 + v7;
|
5887 | p[row + 7] = v0 - v7;
|
5888 | p[row + 1] = v1 + v6;
|
5889 | p[row + 6] = v1 - v6;
|
5890 | p[row + 2] = v2 + v5;
|
5891 | p[row + 5] = v2 - v5;
|
5892 | p[row + 3] = v3 + v4;
|
5893 | p[row + 4] = v3 - v4;
|
5894 | }
|
5895 |
|
5896 | for (let col = 0; col < 8; ++col) {
|
5897 | p0 = p[col];
|
5898 | p1 = p[col + 8];
|
5899 | p2 = p[col + 16];
|
5900 | p3 = p[col + 24];
|
5901 | p4 = p[col + 32];
|
5902 | p5 = p[col + 40];
|
5903 | p6 = p[col + 48];
|
5904 | p7 = p[col + 56];
|
5905 |
|
5906 | if ((p1 | p2 | p3 | p4 | p5 | p6 | p7) === 0) {
|
5907 | t = dctSqrt2 * p0 + 8192 >> 14;
|
5908 |
|
5909 | if (t < -2040) {
|
5910 | t = 0;
|
5911 | } else if (t >= 2024) {
|
5912 | t = 255;
|
5913 | } else {
|
5914 | t = t + 2056 >> 4;
|
5915 | }
|
5916 |
|
5917 | blockData[blockBufferOffset + col] = t;
|
5918 | blockData[blockBufferOffset + col + 8] = t;
|
5919 | blockData[blockBufferOffset + col + 16] = t;
|
5920 | blockData[blockBufferOffset + col + 24] = t;
|
5921 | blockData[blockBufferOffset + col + 32] = t;
|
5922 | blockData[blockBufferOffset + col + 40] = t;
|
5923 | blockData[blockBufferOffset + col + 48] = t;
|
5924 | blockData[blockBufferOffset + col + 56] = t;
|
5925 | continue;
|
5926 | }
|
5927 |
|
5928 | v0 = dctSqrt2 * p0 + 2048 >> 12;
|
5929 | v1 = dctSqrt2 * p4 + 2048 >> 12;
|
5930 | v2 = p2;
|
5931 | v3 = p6;
|
5932 | v4 = dctSqrt1d2 * (p1 - p7) + 2048 >> 12;
|
5933 | v7 = dctSqrt1d2 * (p1 + p7) + 2048 >> 12;
|
5934 | v5 = p3;
|
5935 | v6 = p5;
|
5936 | v0 = (v0 + v1 + 1 >> 1) + 4112;
|
5937 | v1 = v0 - v1;
|
5938 | t = v2 * dctSin6 + v3 * dctCos6 + 2048 >> 12;
|
5939 | v2 = v2 * dctCos6 - v3 * dctSin6 + 2048 >> 12;
|
5940 | v3 = t;
|
5941 | v4 = v4 + v6 + 1 >> 1;
|
5942 | v6 = v4 - v6;
|
5943 | v7 = v7 + v5 + 1 >> 1;
|
5944 | v5 = v7 - v5;
|
5945 | v0 = v0 + v3 + 1 >> 1;
|
5946 | v3 = v0 - v3;
|
5947 | v1 = v1 + v2 + 1 >> 1;
|
5948 | v2 = v1 - v2;
|
5949 | t = v4 * dctSin3 + v7 * dctCos3 + 2048 >> 12;
|
5950 | v4 = v4 * dctCos3 - v7 * dctSin3 + 2048 >> 12;
|
5951 | v7 = t;
|
5952 | t = v5 * dctSin1 + v6 * dctCos1 + 2048 >> 12;
|
5953 | v5 = v5 * dctCos1 - v6 * dctSin1 + 2048 >> 12;
|
5954 | v6 = t;
|
5955 | p0 = v0 + v7;
|
5956 | p7 = v0 - v7;
|
5957 | p1 = v1 + v6;
|
5958 | p6 = v1 - v6;
|
5959 | p2 = v2 + v5;
|
5960 | p5 = v2 - v5;
|
5961 | p3 = v3 + v4;
|
5962 | p4 = v3 - v4;
|
5963 |
|
5964 | if (p0 < 16) {
|
5965 | p0 = 0;
|
5966 | } else if (p0 >= 4080) {
|
5967 | p0 = 255;
|
5968 | } else {
|
5969 | p0 >>= 4;
|
5970 | }
|
5971 |
|
5972 | if (p1 < 16) {
|
5973 | p1 = 0;
|
5974 | } else if (p1 >= 4080) {
|
5975 | p1 = 255;
|
5976 | } else {
|
5977 | p1 >>= 4;
|
5978 | }
|
5979 |
|
5980 | if (p2 < 16) {
|
5981 | p2 = 0;
|
5982 | } else if (p2 >= 4080) {
|
5983 | p2 = 255;
|
5984 | } else {
|
5985 | p2 >>= 4;
|
5986 | }
|
5987 |
|
5988 | if (p3 < 16) {
|
5989 | p3 = 0;
|
5990 | } else if (p3 >= 4080) {
|
5991 | p3 = 255;
|
5992 | } else {
|
5993 | p3 >>= 4;
|
5994 | }
|
5995 |
|
5996 | if (p4 < 16) {
|
5997 | p4 = 0;
|
5998 | } else if (p4 >= 4080) {
|
5999 | p4 = 255;
|
6000 | } else {
|
6001 | p4 >>= 4;
|
6002 | }
|
6003 |
|
6004 | if (p5 < 16) {
|
6005 | p5 = 0;
|
6006 | } else if (p5 >= 4080) {
|
6007 | p5 = 255;
|
6008 | } else {
|
6009 | p5 >>= 4;
|
6010 | }
|
6011 |
|
6012 | if (p6 < 16) {
|
6013 | p6 = 0;
|
6014 | } else if (p6 >= 4080) {
|
6015 | p6 = 255;
|
6016 | } else {
|
6017 | p6 >>= 4;
|
6018 | }
|
6019 |
|
6020 | if (p7 < 16) {
|
6021 | p7 = 0;
|
6022 | } else if (p7 >= 4080) {
|
6023 | p7 = 255;
|
6024 | } else {
|
6025 | p7 >>= 4;
|
6026 | }
|
6027 |
|
6028 | blockData[blockBufferOffset + col] = p0;
|
6029 | blockData[blockBufferOffset + col + 8] = p1;
|
6030 | blockData[blockBufferOffset + col + 16] = p2;
|
6031 | blockData[blockBufferOffset + col + 24] = p3;
|
6032 | blockData[blockBufferOffset + col + 32] = p4;
|
6033 | blockData[blockBufferOffset + col + 40] = p5;
|
6034 | blockData[blockBufferOffset + col + 48] = p6;
|
6035 | blockData[blockBufferOffset + col + 56] = p7;
|
6036 | }
|
6037 | }
|
6038 |
|
6039 | function buildComponentData(frame, component) {
|
6040 | const blocksPerLine = component.blocksPerLine;
|
6041 | const blocksPerColumn = component.blocksPerColumn;
|
6042 | const computationBuffer = new Int16Array(64);
|
6043 |
|
6044 | for (let blockRow = 0; blockRow < blocksPerColumn; blockRow++) {
|
6045 | for (let blockCol = 0; blockCol < blocksPerLine; blockCol++) {
|
6046 | const offset = getBlockBufferOffset(component, blockRow, blockCol);
|
6047 | quantizeAndInverse(component, offset, computationBuffer);
|
6048 | }
|
6049 | }
|
6050 |
|
6051 | return component.blockData;
|
6052 | }
|
6053 |
|
6054 | function findNextFileMarker(data, currentPos, startPos = currentPos) {
|
6055 | const maxPos = data.length - 1;
|
6056 | let newPos = startPos < currentPos ? startPos : currentPos;
|
6057 |
|
6058 | if (currentPos >= maxPos) {
|
6059 | return null;
|
6060 | }
|
6061 |
|
6062 | const currentMarker = (0, _core_utils.readUint16)(data, currentPos);
|
6063 |
|
6064 | if (currentMarker >= 0xffc0 && currentMarker <= 0xfffe) {
|
6065 | return {
|
6066 | invalid: null,
|
6067 | marker: currentMarker,
|
6068 | offset: currentPos
|
6069 | };
|
6070 | }
|
6071 |
|
6072 | let newMarker = (0, _core_utils.readUint16)(data, newPos);
|
6073 |
|
6074 | while (!(newMarker >= 0xffc0 && newMarker <= 0xfffe)) {
|
6075 | if (++newPos >= maxPos) {
|
6076 | return null;
|
6077 | }
|
6078 |
|
6079 | newMarker = (0, _core_utils.readUint16)(data, newPos);
|
6080 | }
|
6081 |
|
6082 | return {
|
6083 | invalid: currentMarker.toString(16),
|
6084 | marker: newMarker,
|
6085 | offset: newPos
|
6086 | };
|
6087 | }
|
6088 |
|
6089 | class JpegImage {
|
6090 | constructor({
|
6091 | decodeTransform = null,
|
6092 | colorTransform = -1
|
6093 | } = {}) {
|
6094 | this._decodeTransform = decodeTransform;
|
6095 | this._colorTransform = colorTransform;
|
6096 | }
|
6097 |
|
6098 | parse(data, {
|
6099 | dnlScanLines = null
|
6100 | } = {}) {
|
6101 | function readDataBlock() {
|
6102 | const length = (0, _core_utils.readUint16)(data, offset);
|
6103 | offset += 2;
|
6104 | let endOffset = offset + length - 2;
|
6105 | const fileMarker = findNextFileMarker(data, endOffset, offset);
|
6106 |
|
6107 | if (fileMarker && fileMarker.invalid) {
|
6108 | (0, _util.warn)("readDataBlock - incorrect length, current marker is: " + fileMarker.invalid);
|
6109 | endOffset = fileMarker.offset;
|
6110 | }
|
6111 |
|
6112 | const array = data.subarray(offset, endOffset);
|
6113 | offset += array.length;
|
6114 | return array;
|
6115 | }
|
6116 |
|
6117 | function prepareComponents(frame) {
|
6118 | const mcusPerLine = Math.ceil(frame.samplesPerLine / 8 / frame.maxH);
|
6119 | const mcusPerColumn = Math.ceil(frame.scanLines / 8 / frame.maxV);
|
6120 |
|
6121 | for (let i = 0, ii = frame.components.length; i < ii; i++) {
|
6122 | const component = frame.components[i];
|
6123 | const blocksPerLine = Math.ceil(Math.ceil(frame.samplesPerLine / 8) * component.h / frame.maxH);
|
6124 | const blocksPerColumn = Math.ceil(Math.ceil(frame.scanLines / 8) * component.v / frame.maxV);
|
6125 | const blocksPerLineForMcu = mcusPerLine * component.h;
|
6126 | const blocksPerColumnForMcu = mcusPerColumn * component.v;
|
6127 | const blocksBufferSize = 64 * blocksPerColumnForMcu * (blocksPerLineForMcu + 1);
|
6128 | component.blockData = new Int16Array(blocksBufferSize);
|
6129 | component.blocksPerLine = blocksPerLine;
|
6130 | component.blocksPerColumn = blocksPerColumn;
|
6131 | }
|
6132 |
|
6133 | frame.mcusPerLine = mcusPerLine;
|
6134 | frame.mcusPerColumn = mcusPerColumn;
|
6135 | }
|
6136 |
|
6137 | let offset = 0;
|
6138 | let jfif = null;
|
6139 | let adobe = null;
|
6140 | let frame, resetInterval;
|
6141 | let numSOSMarkers = 0;
|
6142 | const quantizationTables = [];
|
6143 | const huffmanTablesAC = [],
|
6144 | huffmanTablesDC = [];
|
6145 | let fileMarker = (0, _core_utils.readUint16)(data, offset);
|
6146 | offset += 2;
|
6147 |
|
6148 | if (fileMarker !== 0xffd8) {
|
6149 | throw new JpegError("SOI not found");
|
6150 | }
|
6151 |
|
6152 | fileMarker = (0, _core_utils.readUint16)(data, offset);
|
6153 | offset += 2;
|
6154 |
|
6155 | markerLoop: while (fileMarker !== 0xffd9) {
|
6156 | let i, j, l;
|
6157 |
|
6158 | switch (fileMarker) {
|
6159 | case 0xffe0:
|
6160 | case 0xffe1:
|
6161 | case 0xffe2:
|
6162 | case 0xffe3:
|
6163 | case 0xffe4:
|
6164 | case 0xffe5:
|
6165 | case 0xffe6:
|
6166 | case 0xffe7:
|
6167 | case 0xffe8:
|
6168 | case 0xffe9:
|
6169 | case 0xffea:
|
6170 | case 0xffeb:
|
6171 | case 0xffec:
|
6172 | case 0xffed:
|
6173 | case 0xffee:
|
6174 | case 0xffef:
|
6175 | case 0xfffe:
|
6176 | const appData = readDataBlock();
|
6177 |
|
6178 | if (fileMarker === 0xffe0) {
|
6179 | if (appData[0] === 0x4a && appData[1] === 0x46 && appData[2] === 0x49 && appData[3] === 0x46 && appData[4] === 0) {
|
6180 | jfif = {
|
6181 | version: {
|
6182 | major: appData[5],
|
6183 | minor: appData[6]
|
6184 | },
|
6185 | densityUnits: appData[7],
|
6186 | xDensity: appData[8] << 8 | appData[9],
|
6187 | yDensity: appData[10] << 8 | appData[11],
|
6188 | thumbWidth: appData[12],
|
6189 | thumbHeight: appData[13],
|
6190 | thumbData: appData.subarray(14, 14 + 3 * appData[12] * appData[13])
|
6191 | };
|
6192 | }
|
6193 | }
|
6194 |
|
6195 | if (fileMarker === 0xffee) {
|
6196 | if (appData[0] === 0x41 && appData[1] === 0x64 && appData[2] === 0x6f && appData[3] === 0x62 && appData[4] === 0x65) {
|
6197 | adobe = {
|
6198 | version: appData[5] << 8 | appData[6],
|
6199 | flags0: appData[7] << 8 | appData[8],
|
6200 | flags1: appData[9] << 8 | appData[10],
|
6201 | transformCode: appData[11]
|
6202 | };
|
6203 | }
|
6204 | }
|
6205 |
|
6206 | break;
|
6207 |
|
6208 | case 0xffdb:
|
6209 | const quantizationTablesLength = (0, _core_utils.readUint16)(data, offset);
|
6210 | offset += 2;
|
6211 | const quantizationTablesEnd = quantizationTablesLength + offset - 2;
|
6212 | let z;
|
6213 |
|
6214 | while (offset < quantizationTablesEnd) {
|
6215 | const quantizationTableSpec = data[offset++];
|
6216 | const tableData = new Uint16Array(64);
|
6217 |
|
6218 | if (quantizationTableSpec >> 4 === 0) {
|
6219 | for (j = 0; j < 64; j++) {
|
6220 | z = dctZigZag[j];
|
6221 | tableData[z] = data[offset++];
|
6222 | }
|
6223 | } else if (quantizationTableSpec >> 4 === 1) {
|
6224 | for (j = 0; j < 64; j++) {
|
6225 | z = dctZigZag[j];
|
6226 | tableData[z] = (0, _core_utils.readUint16)(data, offset);
|
6227 | offset += 2;
|
6228 | }
|
6229 | } else {
|
6230 | throw new JpegError("DQT - invalid table spec");
|
6231 | }
|
6232 |
|
6233 | quantizationTables[quantizationTableSpec & 15] = tableData;
|
6234 | }
|
6235 |
|
6236 | break;
|
6237 |
|
6238 | case 0xffc0:
|
6239 | case 0xffc1:
|
6240 | case 0xffc2:
|
6241 | if (frame) {
|
6242 | throw new JpegError("Only single frame JPEGs supported");
|
6243 | }
|
6244 |
|
6245 | offset += 2;
|
6246 | frame = {};
|
6247 | frame.extended = fileMarker === 0xffc1;
|
6248 | frame.progressive = fileMarker === 0xffc2;
|
6249 | frame.precision = data[offset++];
|
6250 | const sofScanLines = (0, _core_utils.readUint16)(data, offset);
|
6251 | offset += 2;
|
6252 | frame.scanLines = dnlScanLines || sofScanLines;
|
6253 | frame.samplesPerLine = (0, _core_utils.readUint16)(data, offset);
|
6254 | offset += 2;
|
6255 | frame.components = [];
|
6256 | frame.componentIds = {};
|
6257 | const componentsCount = data[offset++];
|
6258 | let maxH = 0,
|
6259 | maxV = 0;
|
6260 |
|
6261 | for (i = 0; i < componentsCount; i++) {
|
6262 | const componentId = data[offset];
|
6263 | const h = data[offset + 1] >> 4;
|
6264 | const v = data[offset + 1] & 15;
|
6265 |
|
6266 | if (maxH < h) {
|
6267 | maxH = h;
|
6268 | }
|
6269 |
|
6270 | if (maxV < v) {
|
6271 | maxV = v;
|
6272 | }
|
6273 |
|
6274 | const qId = data[offset + 2];
|
6275 | l = frame.components.push({
|
6276 | h,
|
6277 | v,
|
6278 | quantizationId: qId,
|
6279 | quantizationTable: null
|
6280 | });
|
6281 | frame.componentIds[componentId] = l - 1;
|
6282 | offset += 3;
|
6283 | }
|
6284 |
|
6285 | frame.maxH = maxH;
|
6286 | frame.maxV = maxV;
|
6287 | prepareComponents(frame);
|
6288 | break;
|
6289 |
|
6290 | case 0xffc4:
|
6291 | const huffmanLength = (0, _core_utils.readUint16)(data, offset);
|
6292 | offset += 2;
|
6293 |
|
6294 | for (i = 2; i < huffmanLength;) {
|
6295 | const huffmanTableSpec = data[offset++];
|
6296 | const codeLengths = new Uint8Array(16);
|
6297 | let codeLengthSum = 0;
|
6298 |
|
6299 | for (j = 0; j < 16; j++, offset++) {
|
6300 | codeLengthSum += codeLengths[j] = data[offset];
|
6301 | }
|
6302 |
|
6303 | const huffmanValues = new Uint8Array(codeLengthSum);
|
6304 |
|
6305 | for (j = 0; j < codeLengthSum; j++, offset++) {
|
6306 | huffmanValues[j] = data[offset];
|
6307 | }
|
6308 |
|
6309 | i += 17 + codeLengthSum;
|
6310 | (huffmanTableSpec >> 4 === 0 ? huffmanTablesDC : huffmanTablesAC)[huffmanTableSpec & 15] = buildHuffmanTable(codeLengths, huffmanValues);
|
6311 | }
|
6312 |
|
6313 | break;
|
6314 |
|
6315 | case 0xffdd:
|
6316 | offset += 2;
|
6317 | resetInterval = (0, _core_utils.readUint16)(data, offset);
|
6318 | offset += 2;
|
6319 | break;
|
6320 |
|
6321 | case 0xffda:
|
6322 | const parseDNLMarker = ++numSOSMarkers === 1 && !dnlScanLines;
|
6323 | offset += 2;
|
6324 | const selectorsCount = data[offset++],
|
6325 | components = [];
|
6326 |
|
6327 | for (i = 0; i < selectorsCount; i++) {
|
6328 | const index = data[offset++];
|
6329 | const componentIndex = frame.componentIds[index];
|
6330 | const component = frame.components[componentIndex];
|
6331 | component.index = index;
|
6332 | const tableSpec = data[offset++];
|
6333 | component.huffmanTableDC = huffmanTablesDC[tableSpec >> 4];
|
6334 | component.huffmanTableAC = huffmanTablesAC[tableSpec & 15];
|
6335 | components.push(component);
|
6336 | }
|
6337 |
|
6338 | const spectralStart = data[offset++],
|
6339 | spectralEnd = data[offset++],
|
6340 | successiveApproximation = data[offset++];
|
6341 |
|
6342 | try {
|
6343 | const processed = decodeScan(data, offset, frame, components, resetInterval, spectralStart, spectralEnd, successiveApproximation >> 4, successiveApproximation & 15, parseDNLMarker);
|
6344 | offset += processed;
|
6345 | } catch (ex) {
|
6346 | if (ex instanceof DNLMarkerError) {
|
6347 | (0, _util.warn)(`${ex.message} -- attempting to re-parse the JPEG image.`);
|
6348 | return this.parse(data, {
|
6349 | dnlScanLines: ex.scanLines
|
6350 | });
|
6351 | } else if (ex instanceof EOIMarkerError) {
|
6352 | (0, _util.warn)(`${ex.message} -- ignoring the rest of the image data.`);
|
6353 | break markerLoop;
|
6354 | }
|
6355 |
|
6356 | throw ex;
|
6357 | }
|
6358 |
|
6359 | break;
|
6360 |
|
6361 | case 0xffdc:
|
6362 | offset += 4;
|
6363 | break;
|
6364 |
|
6365 | case 0xffff:
|
6366 | if (data[offset] !== 0xff) {
|
6367 | offset--;
|
6368 | }
|
6369 |
|
6370 | break;
|
6371 |
|
6372 | default:
|
6373 | const nextFileMarker = findNextFileMarker(data, offset - 2, offset - 3);
|
6374 |
|
6375 | if (nextFileMarker && nextFileMarker.invalid) {
|
6376 | (0, _util.warn)("JpegImage.parse - unexpected data, current marker is: " + nextFileMarker.invalid);
|
6377 | offset = nextFileMarker.offset;
|
6378 | break;
|
6379 | }
|
6380 |
|
6381 | if (!nextFileMarker || offset >= data.length - 1) {
|
6382 | (0, _util.warn)("JpegImage.parse - reached the end of the image data " + "without finding an EOI marker (0xFFD9).");
|
6383 | break markerLoop;
|
6384 | }
|
6385 |
|
6386 | throw new JpegError("JpegImage.parse - unknown marker: " + fileMarker.toString(16));
|
6387 | }
|
6388 |
|
6389 | fileMarker = (0, _core_utils.readUint16)(data, offset);
|
6390 | offset += 2;
|
6391 | }
|
6392 |
|
6393 | this.width = frame.samplesPerLine;
|
6394 | this.height = frame.scanLines;
|
6395 | this.jfif = jfif;
|
6396 | this.adobe = adobe;
|
6397 | this.components = [];
|
6398 |
|
6399 | for (let i = 0, ii = frame.components.length; i < ii; i++) {
|
6400 | const component = frame.components[i];
|
6401 | const quantizationTable = quantizationTables[component.quantizationId];
|
6402 |
|
6403 | if (quantizationTable) {
|
6404 | component.quantizationTable = quantizationTable;
|
6405 | }
|
6406 |
|
6407 | this.components.push({
|
6408 | index: component.index,
|
6409 | output: buildComponentData(frame, component),
|
6410 | scaleX: component.h / frame.maxH,
|
6411 | scaleY: component.v / frame.maxV,
|
6412 | blocksPerLine: component.blocksPerLine,
|
6413 | blocksPerColumn: component.blocksPerColumn
|
6414 | });
|
6415 | }
|
6416 |
|
6417 | this.numComponents = this.components.length;
|
6418 | return undefined;
|
6419 | }
|
6420 |
|
6421 | _getLinearizedBlockData(width, height, isSourcePDF = false) {
|
6422 | const scaleX = this.width / width,
|
6423 | scaleY = this.height / height;
|
6424 | let component, componentScaleX, componentScaleY, blocksPerScanline;
|
6425 | let x, y, i, j, k;
|
6426 | let index;
|
6427 | let offset = 0;
|
6428 | let output;
|
6429 | const numComponents = this.components.length;
|
6430 | const dataLength = width * height * numComponents;
|
6431 | const data = new Uint8ClampedArray(dataLength);
|
6432 | const xScaleBlockOffset = new Uint32Array(width);
|
6433 | const mask3LSB = 0xfffffff8;
|
6434 | let lastComponentScaleX;
|
6435 |
|
6436 | for (i = 0; i < numComponents; i++) {
|
6437 | component = this.components[i];
|
6438 | componentScaleX = component.scaleX * scaleX;
|
6439 | componentScaleY = component.scaleY * scaleY;
|
6440 | offset = i;
|
6441 | output = component.output;
|
6442 | blocksPerScanline = component.blocksPerLine + 1 << 3;
|
6443 |
|
6444 | if (componentScaleX !== lastComponentScaleX) {
|
6445 | for (x = 0; x < width; x++) {
|
6446 | j = 0 | x * componentScaleX;
|
6447 | xScaleBlockOffset[x] = (j & mask3LSB) << 3 | j & 7;
|
6448 | }
|
6449 |
|
6450 | lastComponentScaleX = componentScaleX;
|
6451 | }
|
6452 |
|
6453 | for (y = 0; y < height; y++) {
|
6454 | j = 0 | y * componentScaleY;
|
6455 | index = blocksPerScanline * (j & mask3LSB) | (j & 7) << 3;
|
6456 |
|
6457 | for (x = 0; x < width; x++) {
|
6458 | data[offset] = output[index + xScaleBlockOffset[x]];
|
6459 | offset += numComponents;
|
6460 | }
|
6461 | }
|
6462 | }
|
6463 |
|
6464 | let transform = this._decodeTransform;
|
6465 |
|
6466 | if (!isSourcePDF && numComponents === 4 && !transform) {
|
6467 | transform = new Int32Array([-256, 255, -256, 255, -256, 255, -256, 255]);
|
6468 | }
|
6469 |
|
6470 | if (transform) {
|
6471 | for (i = 0; i < dataLength;) {
|
6472 | for (j = 0, k = 0; j < numComponents; j++, i++, k += 2) {
|
6473 | data[i] = (data[i] * transform[k] >> 8) + transform[k + 1];
|
6474 | }
|
6475 | }
|
6476 | }
|
6477 |
|
6478 | return data;
|
6479 | }
|
6480 |
|
6481 | get _isColorConversionNeeded() {
|
6482 | if (this.adobe) {
|
6483 | return !!this.adobe.transformCode;
|
6484 | }
|
6485 |
|
6486 | if (this.numComponents === 3) {
|
6487 | if (this._colorTransform === 0) {
|
6488 | return false;
|
6489 | } else if (this.components[0].index === 0x52 && this.components[1].index === 0x47 && this.components[2].index === 0x42) {
|
6490 | return false;
|
6491 | }
|
6492 |
|
6493 | return true;
|
6494 | }
|
6495 |
|
6496 | if (this._colorTransform === 1) {
|
6497 | return true;
|
6498 | }
|
6499 |
|
6500 | return false;
|
6501 | }
|
6502 |
|
6503 | _convertYccToRgb(data) {
|
6504 | let Y, Cb, Cr;
|
6505 |
|
6506 | for (let i = 0, length = data.length; i < length; i += 3) {
|
6507 | Y = data[i];
|
6508 | Cb = data[i + 1];
|
6509 | Cr = data[i + 2];
|
6510 | data[i] = Y - 179.456 + 1.402 * Cr;
|
6511 | data[i + 1] = Y + 135.459 - 0.344 * Cb - 0.714 * Cr;
|
6512 | data[i + 2] = Y - 226.816 + 1.772 * Cb;
|
6513 | }
|
6514 |
|
6515 | return data;
|
6516 | }
|
6517 |
|
6518 | _convertYcckToRgb(data) {
|
6519 | let Y, Cb, Cr, k;
|
6520 | let offset = 0;
|
6521 |
|
6522 | for (let i = 0, length = data.length; i < length; i += 4) {
|
6523 | Y = data[i];
|
6524 | Cb = data[i + 1];
|
6525 | Cr = data[i + 2];
|
6526 | k = data[i + 3];
|
6527 | 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);
|
6528 | 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);
|
6529 | 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);
|
6530 | }
|
6531 |
|
6532 | return data.subarray(0, offset);
|
6533 | }
|
6534 |
|
6535 | _convertYcckToCmyk(data) {
|
6536 | let Y, Cb, Cr;
|
6537 |
|
6538 | for (let i = 0, length = data.length; i < length; i += 4) {
|
6539 | Y = data[i];
|
6540 | Cb = data[i + 1];
|
6541 | Cr = data[i + 2];
|
6542 | data[i] = 434.456 - Y - 1.402 * Cr;
|
6543 | data[i + 1] = 119.541 - Y + 0.344 * Cb + 0.714 * Cr;
|
6544 | data[i + 2] = 481.816 - Y - 1.772 * Cb;
|
6545 | }
|
6546 |
|
6547 | return data;
|
6548 | }
|
6549 |
|
6550 | _convertCmykToRgb(data) {
|
6551 | let c, m, y, k;
|
6552 | let offset = 0;
|
6553 |
|
6554 | for (let i = 0, length = data.length; i < length; i += 4) {
|
6555 | c = data[i];
|
6556 | m = data[i + 1];
|
6557 | y = data[i + 2];
|
6558 | k = data[i + 3];
|
6559 | 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);
|
6560 | 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 * (0.0003189131175883281 * k + 0.7364883807733168);
|
6561 | 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);
|
6562 | }
|
6563 |
|
6564 | return data.subarray(0, offset);
|
6565 | }
|
6566 |
|
6567 | getData({
|
6568 | width,
|
6569 | height,
|
6570 | forceRGB = false,
|
6571 | isSourcePDF = false
|
6572 | }) {
|
6573 | if (this.numComponents > 4) {
|
6574 | throw new JpegError("Unsupported color mode");
|
6575 | }
|
6576 |
|
6577 | const data = this._getLinearizedBlockData(width, height, isSourcePDF);
|
6578 |
|
6579 | if (this.numComponents === 1 && forceRGB) {
|
6580 | const dataLength = data.length;
|
6581 | const rgbData = new Uint8ClampedArray(dataLength * 3);
|
6582 | let offset = 0;
|
6583 |
|
6584 | for (let i = 0; i < dataLength; i++) {
|
6585 | const grayColor = data[i];
|
6586 | rgbData[offset++] = grayColor;
|
6587 | rgbData[offset++] = grayColor;
|
6588 | rgbData[offset++] = grayColor;
|
6589 | }
|
6590 |
|
6591 | return rgbData;
|
6592 | } else if (this.numComponents === 3 && this._isColorConversionNeeded) {
|
6593 | return this._convertYccToRgb(data);
|
6594 | } else if (this.numComponents === 4) {
|
6595 | if (this._isColorConversionNeeded) {
|
6596 | if (forceRGB) {
|
6597 | return this._convertYcckToRgb(data);
|
6598 | }
|
6599 |
|
6600 | return this._convertYcckToCmyk(data);
|
6601 | } else if (forceRGB) {
|
6602 | return this._convertCmykToRgb(data);
|
6603 | }
|
6604 | }
|
6605 |
|
6606 | return data;
|
6607 | }
|
6608 |
|
6609 | }
|
6610 |
|
6611 | exports.JpegImage = JpegImage;
|
6612 |
|
6613 | }),
|
6614 |
|
6615 | ((__unused_webpack_module, exports, __w_pdfjs_require__) => {
|
6616 |
|
6617 |
|
6618 |
|
6619 | Object.defineProperty(exports, "__esModule", ({
|
6620 | value: true
|
6621 | }));
|
6622 | exports.JpxImage = void 0;
|
6623 |
|
6624 | var _util = __w_pdfjs_require__(1);
|
6625 |
|
6626 | var _core_utils = __w_pdfjs_require__(5);
|
6627 |
|
6628 | var _arithmetic_decoder = __w_pdfjs_require__(8);
|
6629 |
|
6630 | class JpxError extends _util.BaseException {
|
6631 | constructor(msg) {
|
6632 | super(`JPX error: ${msg}`, "JpxError");
|
6633 | }
|
6634 |
|
6635 | }
|
6636 |
|
6637 | const SubbandsGainLog2 = {
|
6638 | LL: 0,
|
6639 | LH: 1,
|
6640 | HL: 1,
|
6641 | HH: 2
|
6642 | };
|
6643 |
|
6644 | class JpxImage {
|
6645 | constructor() {
|
6646 | this.failOnCorruptedImage = false;
|
6647 | }
|
6648 |
|
6649 | parse(data) {
|
6650 | const head = (0, _core_utils.readUint16)(data, 0);
|
6651 |
|
6652 | if (head === 0xff4f) {
|
6653 | this.parseCodestream(data, 0, data.length);
|
6654 | return;
|
6655 | }
|
6656 |
|
6657 | const length = data.length;
|
6658 | let position = 0;
|
6659 |
|
6660 | while (position < length) {
|
6661 | let headerSize = 8;
|
6662 | let lbox = (0, _core_utils.readUint32)(data, position);
|
6663 | const tbox = (0, _core_utils.readUint32)(data, position + 4);
|
6664 | position += headerSize;
|
6665 |
|
6666 | if (lbox === 1) {
|
6667 | lbox = (0, _core_utils.readUint32)(data, position) * 4294967296 + (0, _core_utils.readUint32)(data, position + 4);
|
6668 | position += 8;
|
6669 | headerSize += 8;
|
6670 | }
|
6671 |
|
6672 | if (lbox === 0) {
|
6673 | lbox = length - position + headerSize;
|
6674 | }
|
6675 |
|
6676 | if (lbox < headerSize) {
|
6677 | throw new JpxError("Invalid box field size");
|
6678 | }
|
6679 |
|
6680 | const dataLength = lbox - headerSize;
|
6681 | let jumpDataLength = true;
|
6682 |
|
6683 | switch (tbox) {
|
6684 | case 0x6a703268:
|
6685 | jumpDataLength = false;
|
6686 | break;
|
6687 |
|
6688 | case 0x636f6c72:
|
6689 | const method = data[position];
|
6690 |
|
6691 | if (method === 1) {
|
6692 | const colorspace = (0, _core_utils.readUint32)(data, position + 3);
|
6693 |
|
6694 | switch (colorspace) {
|
6695 | case 16:
|
6696 | case 17:
|
6697 | case 18:
|
6698 | break;
|
6699 |
|
6700 | default:
|
6701 | (0, _util.warn)("Unknown colorspace " + colorspace);
|
6702 | break;
|
6703 | }
|
6704 | } else if (method === 2) {
|
6705 | (0, _util.info)("ICC profile not supported");
|
6706 | }
|
6707 |
|
6708 | break;
|
6709 |
|
6710 | case 0x6a703263:
|
6711 | this.parseCodestream(data, position, position + dataLength);
|
6712 | break;
|
6713 |
|
6714 | case 0x6a502020:
|
6715 | if ((0, _core_utils.readUint32)(data, position) !== 0x0d0a870a) {
|
6716 | (0, _util.warn)("Invalid JP2 signature");
|
6717 | }
|
6718 |
|
6719 | break;
|
6720 |
|
6721 | case 0x6a501a1a:
|
6722 | case 0x66747970:
|
6723 | case 0x72726571:
|
6724 | case 0x72657320:
|
6725 | case 0x69686472:
|
6726 | break;
|
6727 |
|
6728 | default:
|
6729 | const headerType = String.fromCharCode(tbox >> 24 & 0xff, tbox >> 16 & 0xff, tbox >> 8 & 0xff, tbox & 0xff);
|
6730 | (0, _util.warn)(`Unsupported header type ${tbox} (${headerType}).`);
|
6731 | break;
|
6732 | }
|
6733 |
|
6734 | if (jumpDataLength) {
|
6735 | position += dataLength;
|
6736 | }
|
6737 | }
|
6738 | }
|
6739 |
|
6740 | parseImageProperties(stream) {
|
6741 | let newByte = stream.getByte();
|
6742 |
|
6743 | while (newByte >= 0) {
|
6744 | const oldByte = newByte;
|
6745 | newByte = stream.getByte();
|
6746 | const code = oldByte << 8 | newByte;
|
6747 |
|
6748 | if (code === 0xff51) {
|
6749 | stream.skip(4);
|
6750 | const Xsiz = stream.getInt32() >>> 0;
|
6751 | const Ysiz = stream.getInt32() >>> 0;
|
6752 | const XOsiz = stream.getInt32() >>> 0;
|
6753 | const YOsiz = stream.getInt32() >>> 0;
|
6754 | stream.skip(16);
|
6755 | const Csiz = stream.getUint16();
|
6756 | this.width = Xsiz - XOsiz;
|
6757 | this.height = Ysiz - YOsiz;
|
6758 | this.componentsCount = Csiz;
|
6759 | this.bitsPerComponent = 8;
|
6760 | return;
|
6761 | }
|
6762 | }
|
6763 |
|
6764 | throw new JpxError("No size marker found in JPX stream");
|
6765 | }
|
6766 |
|
6767 | parseCodestream(data, start, end) {
|
6768 | const context = {};
|
6769 | let doNotRecover = false;
|
6770 |
|
6771 | try {
|
6772 | let position = start;
|
6773 |
|
6774 | while (position + 1 < end) {
|
6775 | const code = (0, _core_utils.readUint16)(data, position);
|
6776 | position += 2;
|
6777 | let length = 0,
|
6778 | j,
|
6779 | sqcd,
|
6780 | spqcds,
|
6781 | spqcdSize,
|
6782 | scalarExpounded,
|
6783 | tile;
|
6784 |
|
6785 | switch (code) {
|
6786 | case 0xff4f:
|
6787 | context.mainHeader = true;
|
6788 | break;
|
6789 |
|
6790 | case 0xffd9:
|
6791 | break;
|
6792 |
|
6793 | case 0xff51:
|
6794 | length = (0, _core_utils.readUint16)(data, position);
|
6795 | const siz = {};
|
6796 | siz.Xsiz = (0, _core_utils.readUint32)(data, position + 4);
|
6797 | siz.Ysiz = (0, _core_utils.readUint32)(data, position + 8);
|
6798 | siz.XOsiz = (0, _core_utils.readUint32)(data, position + 12);
|
6799 | siz.YOsiz = (0, _core_utils.readUint32)(data, position + 16);
|
6800 | siz.XTsiz = (0, _core_utils.readUint32)(data, position + 20);
|
6801 | siz.YTsiz = (0, _core_utils.readUint32)(data, position + 24);
|
6802 | siz.XTOsiz = (0, _core_utils.readUint32)(data, position + 28);
|
6803 | siz.YTOsiz = (0, _core_utils.readUint32)(data, position + 32);
|
6804 | const componentsCount = (0, _core_utils.readUint16)(data, position + 36);
|
6805 | siz.Csiz = componentsCount;
|
6806 | const components = [];
|
6807 | j = position + 38;
|
6808 |
|
6809 | for (let i = 0; i < componentsCount; i++) {
|
6810 | const component = {
|
6811 | precision: (data[j] & 0x7f) + 1,
|
6812 | isSigned: !!(data[j] & 0x80),
|
6813 | XRsiz: data[j + 1],
|
6814 | YRsiz: data[j + 2]
|
6815 | };
|
6816 | j += 3;
|
6817 | calculateComponentDimensions(component, siz);
|
6818 | components.push(component);
|
6819 | }
|
6820 |
|
6821 | context.SIZ = siz;
|
6822 | context.components = components;
|
6823 | calculateTileGrids(context, components);
|
6824 | context.QCC = [];
|
6825 | context.COC = [];
|
6826 | break;
|
6827 |
|
6828 | case 0xff5c:
|
6829 | length = (0, _core_utils.readUint16)(data, position);
|
6830 | const qcd = {};
|
6831 | j = position + 2;
|
6832 | sqcd = data[j++];
|
6833 |
|
6834 | switch (sqcd & 0x1f) {
|
6835 | case 0:
|
6836 | spqcdSize = 8;
|
6837 | scalarExpounded = true;
|
6838 | break;
|
6839 |
|
6840 | case 1:
|
6841 | spqcdSize = 16;
|
6842 | scalarExpounded = false;
|
6843 | break;
|
6844 |
|
6845 | case 2:
|
6846 | spqcdSize = 16;
|
6847 | scalarExpounded = true;
|
6848 | break;
|
6849 |
|
6850 | default:
|
6851 | throw new Error("Invalid SQcd value " + sqcd);
|
6852 | }
|
6853 |
|
6854 | qcd.noQuantization = spqcdSize === 8;
|
6855 | qcd.scalarExpounded = scalarExpounded;
|
6856 | qcd.guardBits = sqcd >> 5;
|
6857 | spqcds = [];
|
6858 |
|
6859 | while (j < length + position) {
|
6860 | const spqcd = {};
|
6861 |
|
6862 | if (spqcdSize === 8) {
|
6863 | spqcd.epsilon = data[j++] >> 3;
|
6864 | spqcd.mu = 0;
|
6865 | } else {
|
6866 | spqcd.epsilon = data[j] >> 3;
|
6867 | spqcd.mu = (data[j] & 0x7) << 8 | data[j + 1];
|
6868 | j += 2;
|
6869 | }
|
6870 |
|
6871 | spqcds.push(spqcd);
|
6872 | }
|
6873 |
|
6874 | qcd.SPqcds = spqcds;
|
6875 |
|
6876 | if (context.mainHeader) {
|
6877 | context.QCD = qcd;
|
6878 | } else {
|
6879 | context.currentTile.QCD = qcd;
|
6880 | context.currentTile.QCC = [];
|
6881 | }
|
6882 |
|
6883 | break;
|
6884 |
|
6885 | case 0xff5d:
|
6886 | length = (0, _core_utils.readUint16)(data, position);
|
6887 | const qcc = {};
|
6888 | j = position + 2;
|
6889 | let cqcc;
|
6890 |
|
6891 | if (context.SIZ.Csiz < 257) {
|
6892 | cqcc = data[j++];
|
6893 | } else {
|
6894 | cqcc = (0, _core_utils.readUint16)(data, j);
|
6895 | j += 2;
|
6896 | }
|
6897 |
|
6898 | sqcd = data[j++];
|
6899 |
|
6900 | switch (sqcd & 0x1f) {
|
6901 | case 0:
|
6902 | spqcdSize = 8;
|
6903 | scalarExpounded = true;
|
6904 | break;
|
6905 |
|
6906 | case 1:
|
6907 | spqcdSize = 16;
|
6908 | scalarExpounded = false;
|
6909 | break;
|
6910 |
|
6911 | case 2:
|
6912 | spqcdSize = 16;
|
6913 | scalarExpounded = true;
|
6914 | break;
|
6915 |
|
6916 | default:
|
6917 | throw new Error("Invalid SQcd value " + sqcd);
|
6918 | }
|
6919 |
|
6920 | qcc.noQuantization = spqcdSize === 8;
|
6921 | qcc.scalarExpounded = scalarExpounded;
|
6922 | qcc.guardBits = sqcd >> 5;
|
6923 | spqcds = [];
|
6924 |
|
6925 | while (j < length + position) {
|
6926 | const spqcd = {};
|
6927 |
|
6928 | if (spqcdSize === 8) {
|
6929 | spqcd.epsilon = data[j++] >> 3;
|
6930 | spqcd.mu = 0;
|
6931 | } else {
|
6932 | spqcd.epsilon = data[j] >> 3;
|
6933 | spqcd.mu = (data[j] & 0x7) << 8 | data[j + 1];
|
6934 | j += 2;
|
6935 | }
|
6936 |
|
6937 | spqcds.push(spqcd);
|
6938 | }
|
6939 |
|
6940 | qcc.SPqcds = spqcds;
|
6941 |
|
6942 | if (context.mainHeader) {
|
6943 | context.QCC[cqcc] = qcc;
|
6944 | } else {
|
6945 | context.currentTile.QCC[cqcc] = qcc;
|
6946 | }
|
6947 |
|
6948 | break;
|
6949 |
|
6950 | case 0xff52:
|
6951 | length = (0, _core_utils.readUint16)(data, position);
|
6952 | const cod = {};
|
6953 | j = position + 2;
|
6954 | const scod = data[j++];
|
6955 | cod.entropyCoderWithCustomPrecincts = !!(scod & 1);
|
6956 | cod.sopMarkerUsed = !!(scod & 2);
|
6957 | cod.ephMarkerUsed = !!(scod & 4);
|
6958 | cod.progressionOrder = data[j++];
|
6959 | cod.layersCount = (0, _core_utils.readUint16)(data, j);
|
6960 | j += 2;
|
6961 | cod.multipleComponentTransform = data[j++];
|
6962 | cod.decompositionLevelsCount = data[j++];
|
6963 | cod.xcb = (data[j++] & 0xf) + 2;
|
6964 | cod.ycb = (data[j++] & 0xf) + 2;
|
6965 | const blockStyle = data[j++];
|
6966 | cod.selectiveArithmeticCodingBypass = !!(blockStyle & 1);
|
6967 | cod.resetContextProbabilities = !!(blockStyle & 2);
|
6968 | cod.terminationOnEachCodingPass = !!(blockStyle & 4);
|
6969 | cod.verticallyStripe = !!(blockStyle & 8);
|
6970 | cod.predictableTermination = !!(blockStyle & 16);
|
6971 | cod.segmentationSymbolUsed = !!(blockStyle & 32);
|
6972 | cod.reversibleTransformation = data[j++];
|
6973 |
|
6974 | if (cod.entropyCoderWithCustomPrecincts) {
|
6975 | const precinctsSizes = [];
|
6976 |
|
6977 | while (j < length + position) {
|
6978 | const precinctsSize = data[j++];
|
6979 | precinctsSizes.push({
|
6980 | PPx: precinctsSize & 0xf,
|
6981 | PPy: precinctsSize >> 4
|
6982 | });
|
6983 | }
|
6984 |
|
6985 | cod.precinctsSizes = precinctsSizes;
|
6986 | }
|
6987 |
|
6988 | const unsupported = [];
|
6989 |
|
6990 | if (cod.selectiveArithmeticCodingBypass) {
|
6991 | unsupported.push("selectiveArithmeticCodingBypass");
|
6992 | }
|
6993 |
|
6994 | if (cod.terminationOnEachCodingPass) {
|
6995 | unsupported.push("terminationOnEachCodingPass");
|
6996 | }
|
6997 |
|
6998 | if (cod.verticallyStripe) {
|
6999 | unsupported.push("verticallyStripe");
|
7000 | }
|
7001 |
|
7002 | if (cod.predictableTermination) {
|
7003 | unsupported.push("predictableTermination");
|
7004 | }
|
7005 |
|
7006 | if (unsupported.length > 0) {
|
7007 | doNotRecover = true;
|
7008 | (0, _util.warn)(`JPX: Unsupported COD options (${unsupported.join(", ")}).`);
|
7009 | }
|
7010 |
|
7011 | if (context.mainHeader) {
|
7012 | context.COD = cod;
|
7013 | } else {
|
7014 | context.currentTile.COD = cod;
|
7015 | context.currentTile.COC = [];
|
7016 | }
|
7017 |
|
7018 | break;
|
7019 |
|
7020 | case 0xff90:
|
7021 | length = (0, _core_utils.readUint16)(data, position);
|
7022 | tile = {};
|
7023 | tile.index = (0, _core_utils.readUint16)(data, position + 2);
|
7024 | tile.length = (0, _core_utils.readUint32)(data, position + 4);
|
7025 | tile.dataEnd = tile.length + position - 2;
|
7026 | tile.partIndex = data[position + 8];
|
7027 | tile.partsCount = data[position + 9];
|
7028 | context.mainHeader = false;
|
7029 |
|
7030 | if (tile.partIndex === 0) {
|
7031 | tile.COD = context.COD;
|
7032 | tile.COC = context.COC.slice(0);
|
7033 | tile.QCD = context.QCD;
|
7034 | tile.QCC = context.QCC.slice(0);
|
7035 | }
|
7036 |
|
7037 | context.currentTile = tile;
|
7038 | break;
|
7039 |
|
7040 | case 0xff93:
|
7041 | tile = context.currentTile;
|
7042 |
|
7043 | if (tile.partIndex === 0) {
|
7044 | initializeTile(context, tile.index);
|
7045 | buildPackets(context);
|
7046 | }
|
7047 |
|
7048 | length = tile.dataEnd - position;
|
7049 | parseTilePackets(context, data, position, length);
|
7050 | break;
|
7051 |
|
7052 | case 0xff53:
|
7053 | (0, _util.warn)("JPX: Codestream code 0xFF53 (COC) is not implemented.");
|
7054 |
|
7055 | case 0xff55:
|
7056 | case 0xff57:
|
7057 | case 0xff58:
|
7058 | case 0xff64:
|
7059 | length = (0, _core_utils.readUint16)(data, position);
|
7060 | break;
|
7061 |
|
7062 | default:
|
7063 | throw new Error("Unknown codestream code: " + code.toString(16));
|
7064 | }
|
7065 |
|
7066 | position += length;
|
7067 | }
|
7068 | } catch (e) {
|
7069 | if (doNotRecover || this.failOnCorruptedImage) {
|
7070 | throw new JpxError(e.message);
|
7071 | } else {
|
7072 | (0, _util.warn)(`JPX: Trying to recover from: "${e.message}".`);
|
7073 | }
|
7074 | }
|
7075 |
|
7076 | this.tiles = transformComponents(context);
|
7077 | this.width = context.SIZ.Xsiz - context.SIZ.XOsiz;
|
7078 | this.height = context.SIZ.Ysiz - context.SIZ.YOsiz;
|
7079 | this.componentsCount = context.SIZ.Csiz;
|
7080 | }
|
7081 |
|
7082 | }
|
7083 |
|
7084 | exports.JpxImage = JpxImage;
|
7085 |
|
7086 | function calculateComponentDimensions(component, siz) {
|
7087 | component.x0 = Math.ceil(siz.XOsiz / component.XRsiz);
|
7088 | component.x1 = Math.ceil(siz.Xsiz / component.XRsiz);
|
7089 | component.y0 = Math.ceil(siz.YOsiz / component.YRsiz);
|
7090 | component.y1 = Math.ceil(siz.Ysiz / component.YRsiz);
|
7091 | component.width = component.x1 - component.x0;
|
7092 | component.height = component.y1 - component.y0;
|
7093 | }
|
7094 |
|
7095 | function calculateTileGrids(context, components) {
|
7096 | const siz = context.SIZ;
|
7097 | const tiles = [];
|
7098 | let tile;
|
7099 | const numXtiles = Math.ceil((siz.Xsiz - siz.XTOsiz) / siz.XTsiz);
|
7100 | const numYtiles = Math.ceil((siz.Ysiz - siz.YTOsiz) / siz.YTsiz);
|
7101 |
|
7102 | for (let q = 0; q < numYtiles; q++) {
|
7103 | for (let p = 0; p < numXtiles; p++) {
|
7104 | tile = {};
|
7105 | tile.tx0 = Math.max(siz.XTOsiz + p * siz.XTsiz, siz.XOsiz);
|
7106 | tile.ty0 = Math.max(siz.YTOsiz + q * siz.YTsiz, siz.YOsiz);
|
7107 | tile.tx1 = Math.min(siz.XTOsiz + (p + 1) * siz.XTsiz, siz.Xsiz);
|
7108 | tile.ty1 = Math.min(siz.YTOsiz + (q + 1) * siz.YTsiz, siz.Ysiz);
|
7109 | tile.width = tile.tx1 - tile.tx0;
|
7110 | tile.height = tile.ty1 - tile.ty0;
|
7111 | tile.components = [];
|
7112 | tiles.push(tile);
|
7113 | }
|
7114 | }
|
7115 |
|
7116 | context.tiles = tiles;
|
7117 | const componentsCount = siz.Csiz;
|
7118 |
|
7119 | for (let i = 0, ii = componentsCount; i < ii; i++) {
|
7120 | const component = components[i];
|
7121 |
|
7122 | for (let j = 0, jj = tiles.length; j < jj; j++) {
|
7123 | const tileComponent = {};
|
7124 | tile = tiles[j];
|
7125 | tileComponent.tcx0 = Math.ceil(tile.tx0 / component.XRsiz);
|
7126 | tileComponent.tcy0 = Math.ceil(tile.ty0 / component.YRsiz);
|
7127 | tileComponent.tcx1 = Math.ceil(tile.tx1 / component.XRsiz);
|
7128 | tileComponent.tcy1 = Math.ceil(tile.ty1 / component.YRsiz);
|
7129 | tileComponent.width = tileComponent.tcx1 - tileComponent.tcx0;
|
7130 | tileComponent.height = tileComponent.tcy1 - tileComponent.tcy0;
|
7131 | tile.components[i] = tileComponent;
|
7132 | }
|
7133 | }
|
7134 | }
|
7135 |
|
7136 | function getBlocksDimensions(context, component, r) {
|
7137 | const codOrCoc = component.codingStyleParameters;
|
7138 | const result = {};
|
7139 |
|
7140 | if (!codOrCoc.entropyCoderWithCustomPrecincts) {
|
7141 | result.PPx = 15;
|
7142 | result.PPy = 15;
|
7143 | } else {
|
7144 | result.PPx = codOrCoc.precinctsSizes[r].PPx;
|
7145 | result.PPy = codOrCoc.precinctsSizes[r].PPy;
|
7146 | }
|
7147 |
|
7148 | result.xcb_ = r > 0 ? Math.min(codOrCoc.xcb, result.PPx - 1) : Math.min(codOrCoc.xcb, result.PPx);
|
7149 | result.ycb_ = r > 0 ? Math.min(codOrCoc.ycb, result.PPy - 1) : Math.min(codOrCoc.ycb, result.PPy);
|
7150 | return result;
|
7151 | }
|
7152 |
|
7153 | function buildPrecincts(context, resolution, dimensions) {
|
7154 | const precinctWidth = 1 << dimensions.PPx;
|
7155 | const precinctHeight = 1 << dimensions.PPy;
|
7156 | const isZeroRes = resolution.resLevel === 0;
|
7157 | const precinctWidthInSubband = 1 << dimensions.PPx + (isZeroRes ? 0 : -1);
|
7158 | const precinctHeightInSubband = 1 << dimensions.PPy + (isZeroRes ? 0 : -1);
|
7159 | const numprecinctswide = resolution.trx1 > resolution.trx0 ? Math.ceil(resolution.trx1 / precinctWidth) - Math.floor(resolution.trx0 / precinctWidth) : 0;
|
7160 | const numprecinctshigh = resolution.try1 > resolution.try0 ? Math.ceil(resolution.try1 / precinctHeight) - Math.floor(resolution.try0 / precinctHeight) : 0;
|
7161 | const numprecincts = numprecinctswide * numprecinctshigh;
|
7162 | resolution.precinctParameters = {
|
7163 | precinctWidth,
|
7164 | precinctHeight,
|
7165 | numprecinctswide,
|
7166 | numprecinctshigh,
|
7167 | numprecincts,
|
7168 | precinctWidthInSubband,
|
7169 | precinctHeightInSubband
|
7170 | };
|
7171 | }
|
7172 |
|
7173 | function buildCodeblocks(context, subband, dimensions) {
|
7174 | const xcb_ = dimensions.xcb_;
|
7175 | const ycb_ = dimensions.ycb_;
|
7176 | const codeblockWidth = 1 << xcb_;
|
7177 | const codeblockHeight = 1 << ycb_;
|
7178 | const cbx0 = subband.tbx0 >> xcb_;
|
7179 | const cby0 = subband.tby0 >> ycb_;
|
7180 | const cbx1 = subband.tbx1 + codeblockWidth - 1 >> xcb_;
|
7181 | const cby1 = subband.tby1 + codeblockHeight - 1 >> ycb_;
|
7182 | const precinctParameters = subband.resolution.precinctParameters;
|
7183 | const codeblocks = [];
|
7184 | const precincts = [];
|
7185 | let i, j, codeblock, precinctNumber;
|
7186 |
|
7187 | for (j = cby0; j < cby1; j++) {
|
7188 | for (i = cbx0; i < cbx1; i++) {
|
7189 | codeblock = {
|
7190 | cbx: i,
|
7191 | cby: j,
|
7192 | tbx0: codeblockWidth * i,
|
7193 | tby0: codeblockHeight * j,
|
7194 | tbx1: codeblockWidth * (i + 1),
|
7195 | tby1: codeblockHeight * (j + 1)
|
7196 | };
|
7197 | codeblock.tbx0_ = Math.max(subband.tbx0, codeblock.tbx0);
|
7198 | codeblock.tby0_ = Math.max(subband.tby0, codeblock.tby0);
|
7199 | codeblock.tbx1_ = Math.min(subband.tbx1, codeblock.tbx1);
|
7200 | codeblock.tby1_ = Math.min(subband.tby1, codeblock.tby1);
|
7201 | const pi = Math.floor((codeblock.tbx0_ - subband.tbx0) / precinctParameters.precinctWidthInSubband);
|
7202 | const pj = Math.floor((codeblock.tby0_ - subband.tby0) / precinctParameters.precinctHeightInSubband);
|
7203 | precinctNumber = pi + pj * precinctParameters.numprecinctswide;
|
7204 | codeblock.precinctNumber = precinctNumber;
|
7205 | codeblock.subbandType = subband.type;
|
7206 | codeblock.Lblock = 3;
|
7207 |
|
7208 | if (codeblock.tbx1_ <= codeblock.tbx0_ || codeblock.tby1_ <= codeblock.tby0_) {
|
7209 | continue;
|
7210 | }
|
7211 |
|
7212 | codeblocks.push(codeblock);
|
7213 | let precinct = precincts[precinctNumber];
|
7214 |
|
7215 | if (precinct !== undefined) {
|
7216 | if (i < precinct.cbxMin) {
|
7217 | precinct.cbxMin = i;
|
7218 | } else if (i > precinct.cbxMax) {
|
7219 | precinct.cbxMax = i;
|
7220 | }
|
7221 |
|
7222 | if (j < precinct.cbyMin) {
|
7223 | precinct.cbxMin = j;
|
7224 | } else if (j > precinct.cbyMax) {
|
7225 | precinct.cbyMax = j;
|
7226 | }
|
7227 | } else {
|
7228 | precincts[precinctNumber] = precinct = {
|
7229 | cbxMin: i,
|
7230 | cbyMin: j,
|
7231 | cbxMax: i,
|
7232 | cbyMax: j
|
7233 | };
|
7234 | }
|
7235 |
|
7236 | codeblock.precinct = precinct;
|
7237 | }
|
7238 | }
|
7239 |
|
7240 | subband.codeblockParameters = {
|
7241 | codeblockWidth: xcb_,
|
7242 | codeblockHeight: ycb_,
|
7243 | numcodeblockwide: cbx1 - cbx0 + 1,
|
7244 | numcodeblockhigh: cby1 - cby0 + 1
|
7245 | };
|
7246 | subband.codeblocks = codeblocks;
|
7247 | subband.precincts = precincts;
|
7248 | }
|
7249 |
|
7250 | function createPacket(resolution, precinctNumber, layerNumber) {
|
7251 | const precinctCodeblocks = [];
|
7252 | const subbands = resolution.subbands;
|
7253 |
|
7254 | for (let i = 0, ii = subbands.length; i < ii; i++) {
|
7255 | const subband = subbands[i];
|
7256 | const codeblocks = subband.codeblocks;
|
7257 |
|
7258 | for (let j = 0, jj = codeblocks.length; j < jj; j++) {
|
7259 | const codeblock = codeblocks[j];
|
7260 |
|
7261 | if (codeblock.precinctNumber !== precinctNumber) {
|
7262 | continue;
|
7263 | }
|
7264 |
|
7265 | precinctCodeblocks.push(codeblock);
|
7266 | }
|
7267 | }
|
7268 |
|
7269 | return {
|
7270 | layerNumber,
|
7271 | codeblocks: precinctCodeblocks
|
7272 | };
|
7273 | }
|
7274 |
|
7275 | function LayerResolutionComponentPositionIterator(context) {
|
7276 | const siz = context.SIZ;
|
7277 | const tileIndex = context.currentTile.index;
|
7278 | const tile = context.tiles[tileIndex];
|
7279 | const layersCount = tile.codingStyleDefaultParameters.layersCount;
|
7280 | const componentsCount = siz.Csiz;
|
7281 | let maxDecompositionLevelsCount = 0;
|
7282 |
|
7283 | for (let q = 0; q < componentsCount; q++) {
|
7284 | maxDecompositionLevelsCount = Math.max(maxDecompositionLevelsCount, tile.components[q].codingStyleParameters.decompositionLevelsCount);
|
7285 | }
|
7286 |
|
7287 | let l = 0,
|
7288 | r = 0,
|
7289 | i = 0,
|
7290 | k = 0;
|
7291 |
|
7292 | this.nextPacket = function JpxImage_nextPacket() {
|
7293 | for (; l < layersCount; l++) {
|
7294 | for (; r <= maxDecompositionLevelsCount; r++) {
|
7295 | for (; i < componentsCount; i++) {
|
7296 | const component = tile.components[i];
|
7297 |
|
7298 | if (r > component.codingStyleParameters.decompositionLevelsCount) {
|
7299 | continue;
|
7300 | }
|
7301 |
|
7302 | const resolution = component.resolutions[r];
|
7303 | const numprecincts = resolution.precinctParameters.numprecincts;
|
7304 |
|
7305 | for (; k < numprecincts;) {
|
7306 | const packet = createPacket(resolution, k, l);
|
7307 | k++;
|
7308 | return packet;
|
7309 | }
|
7310 |
|
7311 | k = 0;
|
7312 | }
|
7313 |
|
7314 | i = 0;
|
7315 | }
|
7316 |
|
7317 | r = 0;
|
7318 | }
|
7319 |
|
7320 | throw new JpxError("Out of packets");
|
7321 | };
|
7322 | }
|
7323 |
|
7324 | function ResolutionLayerComponentPositionIterator(context) {
|
7325 | const siz = context.SIZ;
|
7326 | const tileIndex = context.currentTile.index;
|
7327 | const tile = context.tiles[tileIndex];
|
7328 | const layersCount = tile.codingStyleDefaultParameters.layersCount;
|
7329 | const componentsCount = siz.Csiz;
|
7330 | let maxDecompositionLevelsCount = 0;
|
7331 |
|
7332 | for (let q = 0; q < componentsCount; q++) {
|
7333 | maxDecompositionLevelsCount = Math.max(maxDecompositionLevelsCount, tile.components[q].codingStyleParameters.decompositionLevelsCount);
|
7334 | }
|
7335 |
|
7336 | let r = 0,
|
7337 | l = 0,
|
7338 | i = 0,
|
7339 | k = 0;
|
7340 |
|
7341 | this.nextPacket = function JpxImage_nextPacket() {
|
7342 | for (; r <= maxDecompositionLevelsCount; r++) {
|
7343 | for (; l < layersCount; l++) {
|
7344 | for (; i < componentsCount; i++) {
|
7345 | const component = tile.components[i];
|
7346 |
|
7347 | if (r > component.codingStyleParameters.decompositionLevelsCount) {
|
7348 | continue;
|
7349 | }
|
7350 |
|
7351 | const resolution = component.resolutions[r];
|
7352 | const numprecincts = resolution.precinctParameters.numprecincts;
|
7353 |
|
7354 | for (; k < numprecincts;) {
|
7355 | const packet = createPacket(resolution, k, l);
|
7356 | k++;
|
7357 | return packet;
|
7358 | }
|
7359 |
|
7360 | k = 0;
|
7361 | }
|
7362 |
|
7363 | i = 0;
|
7364 | }
|
7365 |
|
7366 | l = 0;
|
7367 | }
|
7368 |
|
7369 | throw new JpxError("Out of packets");
|
7370 | };
|
7371 | }
|
7372 |
|
7373 | function ResolutionPositionComponentLayerIterator(context) {
|
7374 | const siz = context.SIZ;
|
7375 | const tileIndex = context.currentTile.index;
|
7376 | const tile = context.tiles[tileIndex];
|
7377 | const layersCount = tile.codingStyleDefaultParameters.layersCount;
|
7378 | const componentsCount = siz.Csiz;
|
7379 | let l, r, c, p;
|
7380 | let maxDecompositionLevelsCount = 0;
|
7381 |
|
7382 | for (c = 0; c < componentsCount; c++) {
|
7383 | const component = tile.components[c];
|
7384 | maxDecompositionLevelsCount = Math.max(maxDecompositionLevelsCount, component.codingStyleParameters.decompositionLevelsCount);
|
7385 | }
|
7386 |
|
7387 | const maxNumPrecinctsInLevel = new Int32Array(maxDecompositionLevelsCount + 1);
|
7388 |
|
7389 | for (r = 0; r <= maxDecompositionLevelsCount; ++r) {
|
7390 | let maxNumPrecincts = 0;
|
7391 |
|
7392 | for (c = 0; c < componentsCount; ++c) {
|
7393 | const resolutions = tile.components[c].resolutions;
|
7394 |
|
7395 | if (r < resolutions.length) {
|
7396 | maxNumPrecincts = Math.max(maxNumPrecincts, resolutions[r].precinctParameters.numprecincts);
|
7397 | }
|
7398 | }
|
7399 |
|
7400 | maxNumPrecinctsInLevel[r] = maxNumPrecincts;
|
7401 | }
|
7402 |
|
7403 | l = 0;
|
7404 | r = 0;
|
7405 | c = 0;
|
7406 | p = 0;
|
7407 |
|
7408 | this.nextPacket = function JpxImage_nextPacket() {
|
7409 | for (; r <= maxDecompositionLevelsCount; r++) {
|
7410 | for (; p < maxNumPrecinctsInLevel[r]; p++) {
|
7411 | for (; c < componentsCount; c++) {
|
7412 | const component = tile.components[c];
|
7413 |
|
7414 | if (r > component.codingStyleParameters.decompositionLevelsCount) {
|
7415 | continue;
|
7416 | }
|
7417 |
|
7418 | const resolution = component.resolutions[r];
|
7419 | const numprecincts = resolution.precinctParameters.numprecincts;
|
7420 |
|
7421 | if (p >= numprecincts) {
|
7422 | continue;
|
7423 | }
|
7424 |
|
7425 | for (; l < layersCount;) {
|
7426 | const packet = createPacket(resolution, p, l);
|
7427 | l++;
|
7428 | return packet;
|
7429 | }
|
7430 |
|
7431 | l = 0;
|
7432 | }
|
7433 |
|
7434 | c = 0;
|
7435 | }
|
7436 |
|
7437 | p = 0;
|
7438 | }
|
7439 |
|
7440 | throw new JpxError("Out of packets");
|
7441 | };
|
7442 | }
|
7443 |
|
7444 | function PositionComponentResolutionLayerIterator(context) {
|
7445 | const siz = context.SIZ;
|
7446 | const tileIndex = context.currentTile.index;
|
7447 | const tile = context.tiles[tileIndex];
|
7448 | const layersCount = tile.codingStyleDefaultParameters.layersCount;
|
7449 | const componentsCount = siz.Csiz;
|
7450 | const precinctsSizes = getPrecinctSizesInImageScale(tile);
|
7451 | const precinctsIterationSizes = precinctsSizes;
|
7452 | let l = 0,
|
7453 | r = 0,
|
7454 | c = 0,
|
7455 | px = 0,
|
7456 | py = 0;
|
7457 |
|
7458 | this.nextPacket = function JpxImage_nextPacket() {
|
7459 | for (; py < precinctsIterationSizes.maxNumHigh; py++) {
|
7460 | for (; px < precinctsIterationSizes.maxNumWide; px++) {
|
7461 | for (; c < componentsCount; c++) {
|
7462 | const component = tile.components[c];
|
7463 | const decompositionLevelsCount = component.codingStyleParameters.decompositionLevelsCount;
|
7464 |
|
7465 | for (; r <= decompositionLevelsCount; r++) {
|
7466 | const resolution = component.resolutions[r];
|
7467 | const sizeInImageScale = precinctsSizes.components[c].resolutions[r];
|
7468 | const k = getPrecinctIndexIfExist(px, py, sizeInImageScale, precinctsIterationSizes, resolution);
|
7469 |
|
7470 | if (k === null) {
|
7471 | continue;
|
7472 | }
|
7473 |
|
7474 | for (; l < layersCount;) {
|
7475 | const packet = createPacket(resolution, k, l);
|
7476 | l++;
|
7477 | return packet;
|
7478 | }
|
7479 |
|
7480 | l = 0;
|
7481 | }
|
7482 |
|
7483 | r = 0;
|
7484 | }
|
7485 |
|
7486 | c = 0;
|
7487 | }
|
7488 |
|
7489 | px = 0;
|
7490 | }
|
7491 |
|
7492 | throw new JpxError("Out of packets");
|
7493 | };
|
7494 | }
|
7495 |
|
7496 | function ComponentPositionResolutionLayerIterator(context) {
|
7497 | const siz = context.SIZ;
|
7498 | const tileIndex = context.currentTile.index;
|
7499 | const tile = context.tiles[tileIndex];
|
7500 | const layersCount = tile.codingStyleDefaultParameters.layersCount;
|
7501 | const componentsCount = siz.Csiz;
|
7502 | const precinctsSizes = getPrecinctSizesInImageScale(tile);
|
7503 | let l = 0,
|
7504 | r = 0,
|
7505 | c = 0,
|
7506 | px = 0,
|
7507 | py = 0;
|
7508 |
|
7509 | this.nextPacket = function JpxImage_nextPacket() {
|
7510 | for (; c < componentsCount; ++c) {
|
7511 | const component = tile.components[c];
|
7512 | const precinctsIterationSizes = precinctsSizes.components[c];
|
7513 | const decompositionLevelsCount = component.codingStyleParameters.decompositionLevelsCount;
|
7514 |
|
7515 | for (; py < precinctsIterationSizes.maxNumHigh; py++) {
|
7516 | for (; px < precinctsIterationSizes.maxNumWide; px++) {
|
7517 | for (; r <= decompositionLevelsCount; r++) {
|
7518 | const resolution = component.resolutions[r];
|
7519 | const sizeInImageScale = precinctsIterationSizes.resolutions[r];
|
7520 | const k = getPrecinctIndexIfExist(px, py, sizeInImageScale, precinctsIterationSizes, resolution);
|
7521 |
|
7522 | if (k === null) {
|
7523 | continue;
|
7524 | }
|
7525 |
|
7526 | for (; l < layersCount;) {
|
7527 | const packet = createPacket(resolution, k, l);
|
7528 | l++;
|
7529 | return packet;
|
7530 | }
|
7531 |
|
7532 | l = 0;
|
7533 | }
|
7534 |
|
7535 | r = 0;
|
7536 | }
|
7537 |
|
7538 | px = 0;
|
7539 | }
|
7540 |
|
7541 | py = 0;
|
7542 | }
|
7543 |
|
7544 | throw new JpxError("Out of packets");
|
7545 | };
|
7546 | }
|
7547 |
|
7548 | function getPrecinctIndexIfExist(pxIndex, pyIndex, sizeInImageScale, precinctIterationSizes, resolution) {
|
7549 | const posX = pxIndex * precinctIterationSizes.minWidth;
|
7550 | const posY = pyIndex * precinctIterationSizes.minHeight;
|
7551 |
|
7552 | if (posX % sizeInImageScale.width !== 0 || posY % sizeInImageScale.height !== 0) {
|
7553 | return null;
|
7554 | }
|
7555 |
|
7556 | const startPrecinctRowIndex = posY / sizeInImageScale.width * resolution.precinctParameters.numprecinctswide;
|
7557 | return posX / sizeInImageScale.height + startPrecinctRowIndex;
|
7558 | }
|
7559 |
|
7560 | function getPrecinctSizesInImageScale(tile) {
|
7561 | const componentsCount = tile.components.length;
|
7562 | let minWidth = Number.MAX_VALUE;
|
7563 | let minHeight = Number.MAX_VALUE;
|
7564 | let maxNumWide = 0;
|
7565 | let maxNumHigh = 0;
|
7566 | const sizePerComponent = new Array(componentsCount);
|
7567 |
|
7568 | for (let c = 0; c < componentsCount; c++) {
|
7569 | const component = tile.components[c];
|
7570 | const decompositionLevelsCount = component.codingStyleParameters.decompositionLevelsCount;
|
7571 | const sizePerResolution = new Array(decompositionLevelsCount + 1);
|
7572 | let minWidthCurrentComponent = Number.MAX_VALUE;
|
7573 | let minHeightCurrentComponent = Number.MAX_VALUE;
|
7574 | let maxNumWideCurrentComponent = 0;
|
7575 | let maxNumHighCurrentComponent = 0;
|
7576 | let scale = 1;
|
7577 |
|
7578 | for (let r = decompositionLevelsCount; r >= 0; --r) {
|
7579 | const resolution = component.resolutions[r];
|
7580 | const widthCurrentResolution = scale * resolution.precinctParameters.precinctWidth;
|
7581 | const heightCurrentResolution = scale * resolution.precinctParameters.precinctHeight;
|
7582 | minWidthCurrentComponent = Math.min(minWidthCurrentComponent, widthCurrentResolution);
|
7583 | minHeightCurrentComponent = Math.min(minHeightCurrentComponent, heightCurrentResolution);
|
7584 | maxNumWideCurrentComponent = Math.max(maxNumWideCurrentComponent, resolution.precinctParameters.numprecinctswide);
|
7585 | maxNumHighCurrentComponent = Math.max(maxNumHighCurrentComponent, resolution.precinctParameters.numprecinctshigh);
|
7586 | sizePerResolution[r] = {
|
7587 | width: widthCurrentResolution,
|
7588 | height: heightCurrentResolution
|
7589 | };
|
7590 | scale <<= 1;
|
7591 | }
|
7592 |
|
7593 | minWidth = Math.min(minWidth, minWidthCurrentComponent);
|
7594 | minHeight = Math.min(minHeight, minHeightCurrentComponent);
|
7595 | maxNumWide = Math.max(maxNumWide, maxNumWideCurrentComponent);
|
7596 | maxNumHigh = Math.max(maxNumHigh, maxNumHighCurrentComponent);
|
7597 | sizePerComponent[c] = {
|
7598 | resolutions: sizePerResolution,
|
7599 | minWidth: minWidthCurrentComponent,
|
7600 | minHeight: minHeightCurrentComponent,
|
7601 | maxNumWide: maxNumWideCurrentComponent,
|
7602 | maxNumHigh: maxNumHighCurrentComponent
|
7603 | };
|
7604 | }
|
7605 |
|
7606 | return {
|
7607 | components: sizePerComponent,
|
7608 | minWidth,
|
7609 | minHeight,
|
7610 | maxNumWide,
|
7611 | maxNumHigh
|
7612 | };
|
7613 | }
|
7614 |
|
7615 | function buildPackets(context) {
|
7616 | const siz = context.SIZ;
|
7617 | const tileIndex = context.currentTile.index;
|
7618 | const tile = context.tiles[tileIndex];
|
7619 | const componentsCount = siz.Csiz;
|
7620 |
|
7621 | for (let c = 0; c < componentsCount; c++) {
|
7622 | const component = tile.components[c];
|
7623 | const decompositionLevelsCount = component.codingStyleParameters.decompositionLevelsCount;
|
7624 | const resolutions = [];
|
7625 | const subbands = [];
|
7626 |
|
7627 | for (let r = 0; r <= decompositionLevelsCount; r++) {
|
7628 | const blocksDimensions = getBlocksDimensions(context, component, r);
|
7629 | const resolution = {};
|
7630 | const scale = 1 << decompositionLevelsCount - r;
|
7631 | resolution.trx0 = Math.ceil(component.tcx0 / scale);
|
7632 | resolution.try0 = Math.ceil(component.tcy0 / scale);
|
7633 | resolution.trx1 = Math.ceil(component.tcx1 / scale);
|
7634 | resolution.try1 = Math.ceil(component.tcy1 / scale);
|
7635 | resolution.resLevel = r;
|
7636 | buildPrecincts(context, resolution, blocksDimensions);
|
7637 | resolutions.push(resolution);
|
7638 | let subband;
|
7639 |
|
7640 | if (r === 0) {
|
7641 | subband = {};
|
7642 | subband.type = "LL";
|
7643 | subband.tbx0 = Math.ceil(component.tcx0 / scale);
|
7644 | subband.tby0 = Math.ceil(component.tcy0 / scale);
|
7645 | subband.tbx1 = Math.ceil(component.tcx1 / scale);
|
7646 | subband.tby1 = Math.ceil(component.tcy1 / scale);
|
7647 | subband.resolution = resolution;
|
7648 | buildCodeblocks(context, subband, blocksDimensions);
|
7649 | subbands.push(subband);
|
7650 | resolution.subbands = [subband];
|
7651 | } else {
|
7652 | const bscale = 1 << decompositionLevelsCount - r + 1;
|
7653 | const resolutionSubbands = [];
|
7654 | subband = {};
|
7655 | subband.type = "HL";
|
7656 | subband.tbx0 = Math.ceil(component.tcx0 / bscale - 0.5);
|
7657 | subband.tby0 = Math.ceil(component.tcy0 / bscale);
|
7658 | subband.tbx1 = Math.ceil(component.tcx1 / bscale - 0.5);
|
7659 | subband.tby1 = Math.ceil(component.tcy1 / bscale);
|
7660 | subband.resolution = resolution;
|
7661 | buildCodeblocks(context, subband, blocksDimensions);
|
7662 | subbands.push(subband);
|
7663 | resolutionSubbands.push(subband);
|
7664 | subband = {};
|
7665 | subband.type = "LH";
|
7666 | subband.tbx0 = Math.ceil(component.tcx0 / bscale);
|
7667 | subband.tby0 = Math.ceil(component.tcy0 / bscale - 0.5);
|
7668 | subband.tbx1 = Math.ceil(component.tcx1 / bscale);
|
7669 | subband.tby1 = Math.ceil(component.tcy1 / bscale - 0.5);
|
7670 | subband.resolution = resolution;
|
7671 | buildCodeblocks(context, subband, blocksDimensions);
|
7672 | subbands.push(subband);
|
7673 | resolutionSubbands.push(subband);
|
7674 | subband = {};
|
7675 | subband.type = "HH";
|
7676 | subband.tbx0 = Math.ceil(component.tcx0 / bscale - 0.5);
|
7677 | subband.tby0 = Math.ceil(component.tcy0 / bscale - 0.5);
|
7678 | subband.tbx1 = Math.ceil(component.tcx1 / bscale - 0.5);
|
7679 | subband.tby1 = Math.ceil(component.tcy1 / bscale - 0.5);
|
7680 | subband.resolution = resolution;
|
7681 | buildCodeblocks(context, subband, blocksDimensions);
|
7682 | subbands.push(subband);
|
7683 | resolutionSubbands.push(subband);
|
7684 | resolution.subbands = resolutionSubbands;
|
7685 | }
|
7686 | }
|
7687 |
|
7688 | component.resolutions = resolutions;
|
7689 | component.subbands = subbands;
|
7690 | }
|
7691 |
|
7692 | const progressionOrder = tile.codingStyleDefaultParameters.progressionOrder;
|
7693 |
|
7694 | switch (progressionOrder) {
|
7695 | case 0:
|
7696 | tile.packetsIterator = new LayerResolutionComponentPositionIterator(context);
|
7697 | break;
|
7698 |
|
7699 | case 1:
|
7700 | tile.packetsIterator = new ResolutionLayerComponentPositionIterator(context);
|
7701 | break;
|
7702 |
|
7703 | case 2:
|
7704 | tile.packetsIterator = new ResolutionPositionComponentLayerIterator(context);
|
7705 | break;
|
7706 |
|
7707 | case 3:
|
7708 | tile.packetsIterator = new PositionComponentResolutionLayerIterator(context);
|
7709 | break;
|
7710 |
|
7711 | case 4:
|
7712 | tile.packetsIterator = new ComponentPositionResolutionLayerIterator(context);
|
7713 | break;
|
7714 |
|
7715 | default:
|
7716 | throw new JpxError(`Unsupported progression order ${progressionOrder}`);
|
7717 | }
|
7718 | }
|
7719 |
|
7720 | function parseTilePackets(context, data, offset, dataLength) {
|
7721 | let position = 0;
|
7722 | let buffer,
|
7723 | bufferSize = 0,
|
7724 | skipNextBit = false;
|
7725 |
|
7726 | function readBits(count) {
|
7727 | while (bufferSize < count) {
|
7728 | const b = data[offset + position];
|
7729 | position++;
|
7730 |
|
7731 | if (skipNextBit) {
|
7732 | buffer = buffer << 7 | b;
|
7733 | bufferSize += 7;
|
7734 | skipNextBit = false;
|
7735 | } else {
|
7736 | buffer = buffer << 8 | b;
|
7737 | bufferSize += 8;
|
7738 | }
|
7739 |
|
7740 | if (b === 0xff) {
|
7741 | skipNextBit = true;
|
7742 | }
|
7743 | }
|
7744 |
|
7745 | bufferSize -= count;
|
7746 | return buffer >>> bufferSize & (1 << count) - 1;
|
7747 | }
|
7748 |
|
7749 | function skipMarkerIfEqual(value) {
|
7750 | if (data[offset + position - 1] === 0xff && data[offset + position] === value) {
|
7751 | skipBytes(1);
|
7752 | return true;
|
7753 | } else if (data[offset + position] === 0xff && data[offset + position + 1] === value) {
|
7754 | skipBytes(2);
|
7755 | return true;
|
7756 | }
|
7757 |
|
7758 | return false;
|
7759 | }
|
7760 |
|
7761 | function skipBytes(count) {
|
7762 | position += count;
|
7763 | }
|
7764 |
|
7765 | function alignToByte() {
|
7766 | bufferSize = 0;
|
7767 |
|
7768 | if (skipNextBit) {
|
7769 | position++;
|
7770 | skipNextBit = false;
|
7771 | }
|
7772 | }
|
7773 |
|
7774 | function readCodingpasses() {
|
7775 | if (readBits(1) === 0) {
|
7776 | return 1;
|
7777 | }
|
7778 |
|
7779 | if (readBits(1) === 0) {
|
7780 | return 2;
|
7781 | }
|
7782 |
|
7783 | let value = readBits(2);
|
7784 |
|
7785 | if (value < 3) {
|
7786 | return value + 3;
|
7787 | }
|
7788 |
|
7789 | value = readBits(5);
|
7790 |
|
7791 | if (value < 31) {
|
7792 | return value + 6;
|
7793 | }
|
7794 |
|
7795 | value = readBits(7);
|
7796 | return value + 37;
|
7797 | }
|
7798 |
|
7799 | const tileIndex = context.currentTile.index;
|
7800 | const tile = context.tiles[tileIndex];
|
7801 | const sopMarkerUsed = context.COD.sopMarkerUsed;
|
7802 | const ephMarkerUsed = context.COD.ephMarkerUsed;
|
7803 | const packetsIterator = tile.packetsIterator;
|
7804 |
|
7805 | while (position < dataLength) {
|
7806 | alignToByte();
|
7807 |
|
7808 | if (sopMarkerUsed && skipMarkerIfEqual(0x91)) {
|
7809 | skipBytes(4);
|
7810 | }
|
7811 |
|
7812 | const packet = packetsIterator.nextPacket();
|
7813 |
|
7814 | if (!readBits(1)) {
|
7815 | continue;
|
7816 | }
|
7817 |
|
7818 | const layerNumber = packet.layerNumber,
|
7819 | queue = [];
|
7820 | let codeblock;
|
7821 |
|
7822 | for (let i = 0, ii = packet.codeblocks.length; i < ii; i++) {
|
7823 | codeblock = packet.codeblocks[i];
|
7824 | let precinct = codeblock.precinct;
|
7825 | const codeblockColumn = codeblock.cbx - precinct.cbxMin;
|
7826 | const codeblockRow = codeblock.cby - precinct.cbyMin;
|
7827 | let codeblockIncluded = false;
|
7828 | let firstTimeInclusion = false;
|
7829 | let valueReady, zeroBitPlanesTree;
|
7830 |
|
7831 | if (codeblock.included !== undefined) {
|
7832 | codeblockIncluded = !!readBits(1);
|
7833 | } else {
|
7834 | precinct = codeblock.precinct;
|
7835 | let inclusionTree;
|
7836 |
|
7837 | if (precinct.inclusionTree !== undefined) {
|
7838 | inclusionTree = precinct.inclusionTree;
|
7839 | } else {
|
7840 | const width = precinct.cbxMax - precinct.cbxMin + 1;
|
7841 | const height = precinct.cbyMax - precinct.cbyMin + 1;
|
7842 | inclusionTree = new InclusionTree(width, height, layerNumber);
|
7843 | zeroBitPlanesTree = new TagTree(width, height);
|
7844 | precinct.inclusionTree = inclusionTree;
|
7845 | precinct.zeroBitPlanesTree = zeroBitPlanesTree;
|
7846 |
|
7847 | for (let l = 0; l < layerNumber; l++) {
|
7848 | if (readBits(1) !== 0) {
|
7849 | throw new JpxError("Invalid tag tree");
|
7850 | }
|
7851 | }
|
7852 | }
|
7853 |
|
7854 | if (inclusionTree.reset(codeblockColumn, codeblockRow, layerNumber)) {
|
7855 | while (true) {
|
7856 | if (readBits(1)) {
|
7857 | valueReady = !inclusionTree.nextLevel();
|
7858 |
|
7859 | if (valueReady) {
|
7860 | codeblock.included = true;
|
7861 | codeblockIncluded = firstTimeInclusion = true;
|
7862 | break;
|
7863 | }
|
7864 | } else {
|
7865 | inclusionTree.incrementValue(layerNumber);
|
7866 | break;
|
7867 | }
|
7868 | }
|
7869 | }
|
7870 | }
|
7871 |
|
7872 | if (!codeblockIncluded) {
|
7873 | continue;
|
7874 | }
|
7875 |
|
7876 | if (firstTimeInclusion) {
|
7877 | zeroBitPlanesTree = precinct.zeroBitPlanesTree;
|
7878 | zeroBitPlanesTree.reset(codeblockColumn, codeblockRow);
|
7879 |
|
7880 | while (true) {
|
7881 | if (readBits(1)) {
|
7882 | valueReady = !zeroBitPlanesTree.nextLevel();
|
7883 |
|
7884 | if (valueReady) {
|
7885 | break;
|
7886 | }
|
7887 | } else {
|
7888 | zeroBitPlanesTree.incrementValue();
|
7889 | }
|
7890 | }
|
7891 |
|
7892 | codeblock.zeroBitPlanes = zeroBitPlanesTree.value;
|
7893 | }
|
7894 |
|
7895 | const codingpasses = readCodingpasses();
|
7896 |
|
7897 | while (readBits(1)) {
|
7898 | codeblock.Lblock++;
|
7899 | }
|
7900 |
|
7901 | const codingpassesLog2 = (0, _core_utils.log2)(codingpasses);
|
7902 | const bits = (codingpasses < 1 << codingpassesLog2 ? codingpassesLog2 - 1 : codingpassesLog2) + codeblock.Lblock;
|
7903 | const codedDataLength = readBits(bits);
|
7904 | queue.push({
|
7905 | codeblock,
|
7906 | codingpasses,
|
7907 | dataLength: codedDataLength
|
7908 | });
|
7909 | }
|
7910 |
|
7911 | alignToByte();
|
7912 |
|
7913 | if (ephMarkerUsed) {
|
7914 | skipMarkerIfEqual(0x92);
|
7915 | }
|
7916 |
|
7917 | while (queue.length > 0) {
|
7918 | const packetItem = queue.shift();
|
7919 | codeblock = packetItem.codeblock;
|
7920 |
|
7921 | if (codeblock.data === undefined) {
|
7922 | codeblock.data = [];
|
7923 | }
|
7924 |
|
7925 | codeblock.data.push({
|
7926 | data,
|
7927 | start: offset + position,
|
7928 | end: offset + position + packetItem.dataLength,
|
7929 | codingpasses: packetItem.codingpasses
|
7930 | });
|
7931 | position += packetItem.dataLength;
|
7932 | }
|
7933 | }
|
7934 |
|
7935 | return position;
|
7936 | }
|
7937 |
|
7938 | function copyCoefficients(coefficients, levelWidth, levelHeight, subband, delta, mb, reversible, segmentationSymbolUsed, resetContextProbabilities) {
|
7939 | const x0 = subband.tbx0;
|
7940 | const y0 = subband.tby0;
|
7941 | const width = subband.tbx1 - subband.tbx0;
|
7942 | const codeblocks = subband.codeblocks;
|
7943 | const right = subband.type.charAt(0) === "H" ? 1 : 0;
|
7944 | const bottom = subband.type.charAt(1) === "H" ? levelWidth : 0;
|
7945 |
|
7946 | for (let i = 0, ii = codeblocks.length; i < ii; ++i) {
|
7947 | const codeblock = codeblocks[i];
|
7948 | const blockWidth = codeblock.tbx1_ - codeblock.tbx0_;
|
7949 | const blockHeight = codeblock.tby1_ - codeblock.tby0_;
|
7950 |
|
7951 | if (blockWidth === 0 || blockHeight === 0) {
|
7952 | continue;
|
7953 | }
|
7954 |
|
7955 | if (codeblock.data === undefined) {
|
7956 | continue;
|
7957 | }
|
7958 |
|
7959 | const bitModel = new BitModel(blockWidth, blockHeight, codeblock.subbandType, codeblock.zeroBitPlanes, mb);
|
7960 | let currentCodingpassType = 2;
|
7961 | const data = codeblock.data;
|
7962 | let totalLength = 0,
|
7963 | codingpasses = 0;
|
7964 | let j, jj, dataItem;
|
7965 |
|
7966 | for (j = 0, jj = data.length; j < jj; j++) {
|
7967 | dataItem = data[j];
|
7968 | totalLength += dataItem.end - dataItem.start;
|
7969 | codingpasses += dataItem.codingpasses;
|
7970 | }
|
7971 |
|
7972 | const encodedData = new Uint8Array(totalLength);
|
7973 | let position = 0;
|
7974 |
|
7975 | for (j = 0, jj = data.length; j < jj; j++) {
|
7976 | dataItem = data[j];
|
7977 | const chunk = dataItem.data.subarray(dataItem.start, dataItem.end);
|
7978 | encodedData.set(chunk, position);
|
7979 | position += chunk.length;
|
7980 | }
|
7981 |
|
7982 | const decoder = new _arithmetic_decoder.ArithmeticDecoder(encodedData, 0, totalLength);
|
7983 | bitModel.setDecoder(decoder);
|
7984 |
|
7985 | for (j = 0; j < codingpasses; j++) {
|
7986 | switch (currentCodingpassType) {
|
7987 | case 0:
|
7988 | bitModel.runSignificancePropagationPass();
|
7989 | break;
|
7990 |
|
7991 | case 1:
|
7992 | bitModel.runMagnitudeRefinementPass();
|
7993 | break;
|
7994 |
|
7995 | case 2:
|
7996 | bitModel.runCleanupPass();
|
7997 |
|
7998 | if (segmentationSymbolUsed) {
|
7999 | bitModel.checkSegmentationSymbol();
|
8000 | }
|
8001 |
|
8002 | break;
|
8003 | }
|
8004 |
|
8005 | if (resetContextProbabilities) {
|
8006 | bitModel.reset();
|
8007 | }
|
8008 |
|
8009 | currentCodingpassType = (currentCodingpassType + 1) % 3;
|
8010 | }
|
8011 |
|
8012 | let offset = codeblock.tbx0_ - x0 + (codeblock.tby0_ - y0) * width;
|
8013 | const sign = bitModel.coefficentsSign;
|
8014 | const magnitude = bitModel.coefficentsMagnitude;
|
8015 | const bitsDecoded = bitModel.bitsDecoded;
|
8016 | const magnitudeCorrection = reversible ? 0 : 0.5;
|
8017 | let k, n, nb;
|
8018 | position = 0;
|
8019 | const interleave = subband.type !== "LL";
|
8020 |
|
8021 | for (j = 0; j < blockHeight; j++) {
|
8022 | const row = offset / width | 0;
|
8023 | const levelOffset = 2 * row * (levelWidth - width) + right + bottom;
|
8024 |
|
8025 | for (k = 0; k < blockWidth; k++) {
|
8026 | n = magnitude[position];
|
8027 |
|
8028 | if (n !== 0) {
|
8029 | n = (n + magnitudeCorrection) * delta;
|
8030 |
|
8031 | if (sign[position] !== 0) {
|
8032 | n = -n;
|
8033 | }
|
8034 |
|
8035 | nb = bitsDecoded[position];
|
8036 | const pos = interleave ? levelOffset + (offset << 1) : offset;
|
8037 |
|
8038 | if (reversible && nb >= mb) {
|
8039 | coefficients[pos] = n;
|
8040 | } else {
|
8041 | coefficients[pos] = n * (1 << mb - nb);
|
8042 | }
|
8043 | }
|
8044 |
|
8045 | offset++;
|
8046 | position++;
|
8047 | }
|
8048 |
|
8049 | offset += width - blockWidth;
|
8050 | }
|
8051 | }
|
8052 | }
|
8053 |
|
8054 | function transformTile(context, tile, c) {
|
8055 | const component = tile.components[c];
|
8056 | const codingStyleParameters = component.codingStyleParameters;
|
8057 | const quantizationParameters = component.quantizationParameters;
|
8058 | const decompositionLevelsCount = codingStyleParameters.decompositionLevelsCount;
|
8059 | const spqcds = quantizationParameters.SPqcds;
|
8060 | const scalarExpounded = quantizationParameters.scalarExpounded;
|
8061 | const guardBits = quantizationParameters.guardBits;
|
8062 | const segmentationSymbolUsed = codingStyleParameters.segmentationSymbolUsed;
|
8063 | const resetContextProbabilities = codingStyleParameters.resetContextProbabilities;
|
8064 | const precision = context.components[c].precision;
|
8065 | const reversible = codingStyleParameters.reversibleTransformation;
|
8066 | const transform = reversible ? new ReversibleTransform() : new IrreversibleTransform();
|
8067 | const subbandCoefficients = [];
|
8068 | let b = 0;
|
8069 |
|
8070 | for (let i = 0; i <= decompositionLevelsCount; i++) {
|
8071 | const resolution = component.resolutions[i];
|
8072 | const width = resolution.trx1 - resolution.trx0;
|
8073 | const height = resolution.try1 - resolution.try0;
|
8074 | const coefficients = new Float32Array(width * height);
|
8075 |
|
8076 | for (let j = 0, jj = resolution.subbands.length; j < jj; j++) {
|
8077 | let mu, epsilon;
|
8078 |
|
8079 | if (!scalarExpounded) {
|
8080 | mu = spqcds[0].mu;
|
8081 | epsilon = spqcds[0].epsilon + (i > 0 ? 1 - i : 0);
|
8082 | } else {
|
8083 | mu = spqcds[b].mu;
|
8084 | epsilon = spqcds[b].epsilon;
|
8085 | b++;
|
8086 | }
|
8087 |
|
8088 | const subband = resolution.subbands[j];
|
8089 | const gainLog2 = SubbandsGainLog2[subband.type];
|
8090 | const delta = reversible ? 1 : 2 ** (precision + gainLog2 - epsilon) * (1 + mu / 2048);
|
8091 | const mb = guardBits + epsilon - 1;
|
8092 | copyCoefficients(coefficients, width, height, subband, delta, mb, reversible, segmentationSymbolUsed, resetContextProbabilities);
|
8093 | }
|
8094 |
|
8095 | subbandCoefficients.push({
|
8096 | width,
|
8097 | height,
|
8098 | items: coefficients
|
8099 | });
|
8100 | }
|
8101 |
|
8102 | const result = transform.calculate(subbandCoefficients, component.tcx0, component.tcy0);
|
8103 | return {
|
8104 | left: component.tcx0,
|
8105 | top: component.tcy0,
|
8106 | width: result.width,
|
8107 | height: result.height,
|
8108 | items: result.items
|
8109 | };
|
8110 | }
|
8111 |
|
8112 | function transformComponents(context) {
|
8113 | const siz = context.SIZ;
|
8114 | const components = context.components;
|
8115 | const componentsCount = siz.Csiz;
|
8116 | const resultImages = [];
|
8117 |
|
8118 | for (let i = 0, ii = context.tiles.length; i < ii; i++) {
|
8119 | const tile = context.tiles[i];
|
8120 | const transformedTiles = [];
|
8121 |
|
8122 | for (let c = 0; c < componentsCount; c++) {
|
8123 | transformedTiles[c] = transformTile(context, tile, c);
|
8124 | }
|
8125 |
|
8126 | const tile0 = transformedTiles[0];
|
8127 | const out = new Uint8ClampedArray(tile0.items.length * componentsCount);
|
8128 | const result = {
|
8129 | left: tile0.left,
|
8130 | top: tile0.top,
|
8131 | width: tile0.width,
|
8132 | height: tile0.height,
|
8133 | items: out
|
8134 | };
|
8135 | let shift, offset;
|
8136 | let pos = 0,
|
8137 | j,
|
8138 | jj,
|
8139 | y0,
|
8140 | y1,
|
8141 | y2;
|
8142 |
|
8143 | if (tile.codingStyleDefaultParameters.multipleComponentTransform) {
|
8144 | const fourComponents = componentsCount === 4;
|
8145 | const y0items = transformedTiles[0].items;
|
8146 | const y1items = transformedTiles[1].items;
|
8147 | const y2items = transformedTiles[2].items;
|
8148 | const y3items = fourComponents ? transformedTiles[3].items : null;
|
8149 | shift = components[0].precision - 8;
|
8150 | offset = (128 << shift) + 0.5;
|
8151 | const component0 = tile.components[0];
|
8152 | const alpha01 = componentsCount - 3;
|
8153 | jj = y0items.length;
|
8154 |
|
8155 | if (!component0.codingStyleParameters.reversibleTransformation) {
|
8156 | for (j = 0; j < jj; j++, pos += alpha01) {
|
8157 | y0 = y0items[j] + offset;
|
8158 | y1 = y1items[j];
|
8159 | y2 = y2items[j];
|
8160 | out[pos++] = y0 + 1.402 * y2 >> shift;
|
8161 | out[pos++] = y0 - 0.34413 * y1 - 0.71414 * y2 >> shift;
|
8162 | out[pos++] = y0 + 1.772 * y1 >> shift;
|
8163 | }
|
8164 | } else {
|
8165 | for (j = 0; j < jj; j++, pos += alpha01) {
|
8166 | y0 = y0items[j] + offset;
|
8167 | y1 = y1items[j];
|
8168 | y2 = y2items[j];
|
8169 | const g = y0 - (y2 + y1 >> 2);
|
8170 | out[pos++] = g + y2 >> shift;
|
8171 | out[pos++] = g >> shift;
|
8172 | out[pos++] = g + y1 >> shift;
|
8173 | }
|
8174 | }
|
8175 |
|
8176 | if (fourComponents) {
|
8177 | for (j = 0, pos = 3; j < jj; j++, pos += 4) {
|
8178 | out[pos] = y3items[j] + offset >> shift;
|
8179 | }
|
8180 | }
|
8181 | } else {
|
8182 | for (let c = 0; c < componentsCount; c++) {
|
8183 | const items = transformedTiles[c].items;
|
8184 | shift = components[c].precision - 8;
|
8185 | offset = (128 << shift) + 0.5;
|
8186 |
|
8187 | for (pos = c, j = 0, jj = items.length; j < jj; j++) {
|
8188 | out[pos] = items[j] + offset >> shift;
|
8189 | pos += componentsCount;
|
8190 | }
|
8191 | }
|
8192 | }
|
8193 |
|
8194 | resultImages.push(result);
|
8195 | }
|
8196 |
|
8197 | return resultImages;
|
8198 | }
|
8199 |
|
8200 | function initializeTile(context, tileIndex) {
|
8201 | const siz = context.SIZ;
|
8202 | const componentsCount = siz.Csiz;
|
8203 | const tile = context.tiles[tileIndex];
|
8204 |
|
8205 | for (let c = 0; c < componentsCount; c++) {
|
8206 | const component = tile.components[c];
|
8207 | const qcdOrQcc = context.currentTile.QCC[c] !== undefined ? context.currentTile.QCC[c] : context.currentTile.QCD;
|
8208 | component.quantizationParameters = qcdOrQcc;
|
8209 | const codOrCoc = context.currentTile.COC[c] !== undefined ? context.currentTile.COC[c] : context.currentTile.COD;
|
8210 | component.codingStyleParameters = codOrCoc;
|
8211 | }
|
8212 |
|
8213 | tile.codingStyleDefaultParameters = context.currentTile.COD;
|
8214 | }
|
8215 |
|
8216 | class TagTree {
|
8217 | constructor(width, height) {
|
8218 | const levelsLength = (0, _core_utils.log2)(Math.max(width, height)) + 1;
|
8219 | this.levels = [];
|
8220 |
|
8221 | for (let i = 0; i < levelsLength; i++) {
|
8222 | const level = {
|
8223 | width,
|
8224 | height,
|
8225 | items: []
|
8226 | };
|
8227 | this.levels.push(level);
|
8228 | width = Math.ceil(width / 2);
|
8229 | height = Math.ceil(height / 2);
|
8230 | }
|
8231 | }
|
8232 |
|
8233 | reset(i, j) {
|
8234 | let currentLevel = 0,
|
8235 | value = 0,
|
8236 | level;
|
8237 |
|
8238 | while (currentLevel < this.levels.length) {
|
8239 | level = this.levels[currentLevel];
|
8240 | const index = i + j * level.width;
|
8241 |
|
8242 | if (level.items[index] !== undefined) {
|
8243 | value = level.items[index];
|
8244 | break;
|
8245 | }
|
8246 |
|
8247 | level.index = index;
|
8248 | i >>= 1;
|
8249 | j >>= 1;
|
8250 | currentLevel++;
|
8251 | }
|
8252 |
|
8253 | currentLevel--;
|
8254 | level = this.levels[currentLevel];
|
8255 | level.items[level.index] = value;
|
8256 | this.currentLevel = currentLevel;
|
8257 | delete this.value;
|
8258 | }
|
8259 |
|
8260 | incrementValue() {
|
8261 | const level = this.levels[this.currentLevel];
|
8262 | level.items[level.index]++;
|
8263 | }
|
8264 |
|
8265 | nextLevel() {
|
8266 | let currentLevel = this.currentLevel;
|
8267 | let level = this.levels[currentLevel];
|
8268 | const value = level.items[level.index];
|
8269 | currentLevel--;
|
8270 |
|
8271 | if (currentLevel < 0) {
|
8272 | this.value = value;
|
8273 | return false;
|
8274 | }
|
8275 |
|
8276 | this.currentLevel = currentLevel;
|
8277 | level = this.levels[currentLevel];
|
8278 | level.items[level.index] = value;
|
8279 | return true;
|
8280 | }
|
8281 |
|
8282 | }
|
8283 |
|
8284 | class InclusionTree {
|
8285 | constructor(width, height, defaultValue) {
|
8286 | const levelsLength = (0, _core_utils.log2)(Math.max(width, height)) + 1;
|
8287 | this.levels = [];
|
8288 |
|
8289 | for (let i = 0; i < levelsLength; i++) {
|
8290 | const items = new Uint8Array(width * height);
|
8291 |
|
8292 | for (let j = 0, jj = items.length; j < jj; j++) {
|
8293 | items[j] = defaultValue;
|
8294 | }
|
8295 |
|
8296 | const level = {
|
8297 | width,
|
8298 | height,
|
8299 | items
|
8300 | };
|
8301 | this.levels.push(level);
|
8302 | width = Math.ceil(width / 2);
|
8303 | height = Math.ceil(height / 2);
|
8304 | }
|
8305 | }
|
8306 |
|
8307 | reset(i, j, stopValue) {
|
8308 | let currentLevel = 0;
|
8309 |
|
8310 | while (currentLevel < this.levels.length) {
|
8311 | const level = this.levels[currentLevel];
|
8312 | const index = i + j * level.width;
|
8313 | level.index = index;
|
8314 | const value = level.items[index];
|
8315 |
|
8316 | if (value === 0xff) {
|
8317 | break;
|
8318 | }
|
8319 |
|
8320 | if (value > stopValue) {
|
8321 | this.currentLevel = currentLevel;
|
8322 | this.propagateValues();
|
8323 | return false;
|
8324 | }
|
8325 |
|
8326 | i >>= 1;
|
8327 | j >>= 1;
|
8328 | currentLevel++;
|
8329 | }
|
8330 |
|
8331 | this.currentLevel = currentLevel - 1;
|
8332 | return true;
|
8333 | }
|
8334 |
|
8335 | incrementValue(stopValue) {
|
8336 | const level = this.levels[this.currentLevel];
|
8337 | level.items[level.index] = stopValue + 1;
|
8338 | this.propagateValues();
|
8339 | }
|
8340 |
|
8341 | propagateValues() {
|
8342 | let levelIndex = this.currentLevel;
|
8343 | let level = this.levels[levelIndex];
|
8344 | const currentValue = level.items[level.index];
|
8345 |
|
8346 | while (--levelIndex >= 0) {
|
8347 | level = this.levels[levelIndex];
|
8348 | level.items[level.index] = currentValue;
|
8349 | }
|
8350 | }
|
8351 |
|
8352 | nextLevel() {
|
8353 | let currentLevel = this.currentLevel;
|
8354 | let level = this.levels[currentLevel];
|
8355 | const value = level.items[level.index];
|
8356 | level.items[level.index] = 0xff;
|
8357 | currentLevel--;
|
8358 |
|
8359 | if (currentLevel < 0) {
|
8360 | return false;
|
8361 | }
|
8362 |
|
8363 | this.currentLevel = currentLevel;
|
8364 | level = this.levels[currentLevel];
|
8365 | level.items[level.index] = value;
|
8366 | return true;
|
8367 | }
|
8368 |
|
8369 | }
|
8370 |
|
8371 | const BitModel = function BitModelClosure() {
|
8372 | const UNIFORM_CONTEXT = 17;
|
8373 | const RUNLENGTH_CONTEXT = 18;
|
8374 | const 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]);
|
8375 | const 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]);
|
8376 | const 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]);
|
8377 |
|
8378 | class BitModel {
|
8379 | constructor(width, height, subband, zeroBitPlanes, mb) {
|
8380 | this.width = width;
|
8381 | this.height = height;
|
8382 | let contextLabelTable;
|
8383 |
|
8384 | if (subband === "HH") {
|
8385 | contextLabelTable = HHContextLabel;
|
8386 | } else if (subband === "HL") {
|
8387 | contextLabelTable = HLContextLabel;
|
8388 | } else {
|
8389 | contextLabelTable = LLAndLHContextsLabel;
|
8390 | }
|
8391 |
|
8392 | this.contextLabelTable = contextLabelTable;
|
8393 | const coefficientCount = width * height;
|
8394 | this.neighborsSignificance = new Uint8Array(coefficientCount);
|
8395 | this.coefficentsSign = new Uint8Array(coefficientCount);
|
8396 | let coefficentsMagnitude;
|
8397 |
|
8398 | if (mb > 14) {
|
8399 | coefficentsMagnitude = new Uint32Array(coefficientCount);
|
8400 | } else if (mb > 6) {
|
8401 | coefficentsMagnitude = new Uint16Array(coefficientCount);
|
8402 | } else {
|
8403 | coefficentsMagnitude = new Uint8Array(coefficientCount);
|
8404 | }
|
8405 |
|
8406 | this.coefficentsMagnitude = coefficentsMagnitude;
|
8407 | this.processingFlags = new Uint8Array(coefficientCount);
|
8408 | const bitsDecoded = new Uint8Array(coefficientCount);
|
8409 |
|
8410 | if (zeroBitPlanes !== 0) {
|
8411 | for (let i = 0; i < coefficientCount; i++) {
|
8412 | bitsDecoded[i] = zeroBitPlanes;
|
8413 | }
|
8414 | }
|
8415 |
|
8416 | this.bitsDecoded = bitsDecoded;
|
8417 | this.reset();
|
8418 | }
|
8419 |
|
8420 | setDecoder(decoder) {
|
8421 | this.decoder = decoder;
|
8422 | }
|
8423 |
|
8424 | reset() {
|
8425 | this.contexts = new Int8Array(19);
|
8426 | this.contexts[0] = 4 << 1 | 0;
|
8427 | this.contexts[UNIFORM_CONTEXT] = 46 << 1 | 0;
|
8428 | this.contexts[RUNLENGTH_CONTEXT] = 3 << 1 | 0;
|
8429 | }
|
8430 |
|
8431 | setNeighborsSignificance(row, column, index) {
|
8432 | const neighborsSignificance = this.neighborsSignificance;
|
8433 | const width = this.width,
|
8434 | height = this.height;
|
8435 | const left = column > 0;
|
8436 | const right = column + 1 < width;
|
8437 | let i;
|
8438 |
|
8439 | if (row > 0) {
|
8440 | i = index - width;
|
8441 |
|
8442 | if (left) {
|
8443 | neighborsSignificance[i - 1] += 0x10;
|
8444 | }
|
8445 |
|
8446 | if (right) {
|
8447 | neighborsSignificance[i + 1] += 0x10;
|
8448 | }
|
8449 |
|
8450 | neighborsSignificance[i] += 0x04;
|
8451 | }
|
8452 |
|
8453 | if (row + 1 < height) {
|
8454 | i = index + width;
|
8455 |
|
8456 | if (left) {
|
8457 | neighborsSignificance[i - 1] += 0x10;
|
8458 | }
|
8459 |
|
8460 | if (right) {
|
8461 | neighborsSignificance[i + 1] += 0x10;
|
8462 | }
|
8463 |
|
8464 | neighborsSignificance[i] += 0x04;
|
8465 | }
|
8466 |
|
8467 | if (left) {
|
8468 | neighborsSignificance[index - 1] += 0x01;
|
8469 | }
|
8470 |
|
8471 | if (right) {
|
8472 | neighborsSignificance[index + 1] += 0x01;
|
8473 | }
|
8474 |
|
8475 | neighborsSignificance[index] |= 0x80;
|
8476 | }
|
8477 |
|
8478 | runSignificancePropagationPass() {
|
8479 | const decoder = this.decoder;
|
8480 | const width = this.width,
|
8481 | height = this.height;
|
8482 | const coefficentsMagnitude = this.coefficentsMagnitude;
|
8483 | const coefficentsSign = this.coefficentsSign;
|
8484 | const neighborsSignificance = this.neighborsSignificance;
|
8485 | const processingFlags = this.processingFlags;
|
8486 | const contexts = this.contexts;
|
8487 | const labels = this.contextLabelTable;
|
8488 | const bitsDecoded = this.bitsDecoded;
|
8489 | const processedInverseMask = ~1;
|
8490 | const processedMask = 1;
|
8491 | const firstMagnitudeBitMask = 2;
|
8492 |
|
8493 | for (let i0 = 0; i0 < height; i0 += 4) {
|
8494 | for (let j = 0; j < width; j++) {
|
8495 | let index = i0 * width + j;
|
8496 |
|
8497 | for (let i1 = 0; i1 < 4; i1++, index += width) {
|
8498 | const i = i0 + i1;
|
8499 |
|
8500 | if (i >= height) {
|
8501 | break;
|
8502 | }
|
8503 |
|
8504 | processingFlags[index] &= processedInverseMask;
|
8505 |
|
8506 | if (coefficentsMagnitude[index] || !neighborsSignificance[index]) {
|
8507 | continue;
|
8508 | }
|
8509 |
|
8510 | const contextLabel = labels[neighborsSignificance[index]];
|
8511 | const decision = decoder.readBit(contexts, contextLabel);
|
8512 |
|
8513 | if (decision) {
|
8514 | const sign = this.decodeSignBit(i, j, index);
|
8515 | coefficentsSign[index] = sign;
|
8516 | coefficentsMagnitude[index] = 1;
|
8517 | this.setNeighborsSignificance(i, j, index);
|
8518 | processingFlags[index] |= firstMagnitudeBitMask;
|
8519 | }
|
8520 |
|
8521 | bitsDecoded[index]++;
|
8522 | processingFlags[index] |= processedMask;
|
8523 | }
|
8524 | }
|
8525 | }
|
8526 | }
|
8527 |
|
8528 | decodeSignBit(row, column, index) {
|
8529 | const width = this.width,
|
8530 | height = this.height;
|
8531 | const coefficentsMagnitude = this.coefficentsMagnitude;
|
8532 | const coefficentsSign = this.coefficentsSign;
|
8533 | let contribution, sign0, sign1, significance1;
|
8534 | let contextLabel, decoded;
|
8535 | significance1 = column > 0 && coefficentsMagnitude[index - 1] !== 0;
|
8536 |
|
8537 | if (column + 1 < width && coefficentsMagnitude[index + 1] !== 0) {
|
8538 | sign1 = coefficentsSign[index + 1];
|
8539 |
|
8540 | if (significance1) {
|
8541 | sign0 = coefficentsSign[index - 1];
|
8542 | contribution = 1 - sign1 - sign0;
|
8543 | } else {
|
8544 | contribution = 1 - sign1 - sign1;
|
8545 | }
|
8546 | } else if (significance1) {
|
8547 | sign0 = coefficentsSign[index - 1];
|
8548 | contribution = 1 - sign0 - sign0;
|
8549 | } else {
|
8550 | contribution = 0;
|
8551 | }
|
8552 |
|
8553 | const horizontalContribution = 3 * contribution;
|
8554 | significance1 = row > 0 && coefficentsMagnitude[index - width] !== 0;
|
8555 |
|
8556 | if (row + 1 < height && coefficentsMagnitude[index + width] !== 0) {
|
8557 | sign1 = coefficentsSign[index + width];
|
8558 |
|
8559 | if (significance1) {
|
8560 | sign0 = coefficentsSign[index - width];
|
8561 | contribution = 1 - sign1 - sign0 + horizontalContribution;
|
8562 | } else {
|
8563 | contribution = 1 - sign1 - sign1 + horizontalContribution;
|
8564 | }
|
8565 | } else if (significance1) {
|
8566 | sign0 = coefficentsSign[index - width];
|
8567 | contribution = 1 - sign0 - sign0 + horizontalContribution;
|
8568 | } else {
|
8569 | contribution = horizontalContribution;
|
8570 | }
|
8571 |
|
8572 | if (contribution >= 0) {
|
8573 | contextLabel = 9 + contribution;
|
8574 | decoded = this.decoder.readBit(this.contexts, contextLabel);
|
8575 | } else {
|
8576 | contextLabel = 9 - contribution;
|
8577 | decoded = this.decoder.readBit(this.contexts, contextLabel) ^ 1;
|
8578 | }
|
8579 |
|
8580 | return decoded;
|
8581 | }
|
8582 |
|
8583 | runMagnitudeRefinementPass() {
|
8584 | const decoder = this.decoder;
|
8585 | const width = this.width,
|
8586 | height = this.height;
|
8587 | const coefficentsMagnitude = this.coefficentsMagnitude;
|
8588 | const neighborsSignificance = this.neighborsSignificance;
|
8589 | const contexts = this.contexts;
|
8590 | const bitsDecoded = this.bitsDecoded;
|
8591 | const processingFlags = this.processingFlags;
|
8592 | const processedMask = 1;
|
8593 | const firstMagnitudeBitMask = 2;
|
8594 | const length = width * height;
|
8595 | const width4 = width * 4;
|
8596 |
|
8597 | for (let index0 = 0, indexNext; index0 < length; index0 = indexNext) {
|
8598 | indexNext = Math.min(length, index0 + width4);
|
8599 |
|
8600 | for (let j = 0; j < width; j++) {
|
8601 | for (let index = index0 + j; index < indexNext; index += width) {
|
8602 | if (!coefficentsMagnitude[index] || (processingFlags[index] & processedMask) !== 0) {
|
8603 | continue;
|
8604 | }
|
8605 |
|
8606 | let contextLabel = 16;
|
8607 |
|
8608 | if ((processingFlags[index] & firstMagnitudeBitMask) !== 0) {
|
8609 | processingFlags[index] ^= firstMagnitudeBitMask;
|
8610 | const significance = neighborsSignificance[index] & 127;
|
8611 | contextLabel = significance === 0 ? 15 : 14;
|
8612 | }
|
8613 |
|
8614 | const bit = decoder.readBit(contexts, contextLabel);
|
8615 | coefficentsMagnitude[index] = coefficentsMagnitude[index] << 1 | bit;
|
8616 | bitsDecoded[index]++;
|
8617 | processingFlags[index] |= processedMask;
|
8618 | }
|
8619 | }
|
8620 | }
|
8621 | }
|
8622 |
|
8623 | runCleanupPass() {
|
8624 | const decoder = this.decoder;
|
8625 | const width = this.width,
|
8626 | height = this.height;
|
8627 | const neighborsSignificance = this.neighborsSignificance;
|
8628 | const coefficentsMagnitude = this.coefficentsMagnitude;
|
8629 | const coefficentsSign = this.coefficentsSign;
|
8630 | const contexts = this.contexts;
|
8631 | const labels = this.contextLabelTable;
|
8632 | const bitsDecoded = this.bitsDecoded;
|
8633 | const processingFlags = this.processingFlags;
|
8634 | const processedMask = 1;
|
8635 | const firstMagnitudeBitMask = 2;
|
8636 | const oneRowDown = width;
|
8637 | const twoRowsDown = width * 2;
|
8638 | const threeRowsDown = width * 3;
|
8639 | let iNext;
|
8640 |
|
8641 | for (let i0 = 0; i0 < height; i0 = iNext) {
|
8642 | iNext = Math.min(i0 + 4, height);
|
8643 | const indexBase = i0 * width;
|
8644 | const checkAllEmpty = i0 + 3 < height;
|
8645 |
|
8646 | for (let j = 0; j < width; j++) {
|
8647 | const index0 = indexBase + j;
|
8648 | const 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;
|
8649 | let i1 = 0,
|
8650 | index = index0;
|
8651 | let i = i0,
|
8652 | sign;
|
8653 |
|
8654 | if (allEmpty) {
|
8655 | const hasSignificantCoefficent = decoder.readBit(contexts, RUNLENGTH_CONTEXT);
|
8656 |
|
8657 | if (!hasSignificantCoefficent) {
|
8658 | bitsDecoded[index0]++;
|
8659 | bitsDecoded[index0 + oneRowDown]++;
|
8660 | bitsDecoded[index0 + twoRowsDown]++;
|
8661 | bitsDecoded[index0 + threeRowsDown]++;
|
8662 | continue;
|
8663 | }
|
8664 |
|
8665 | i1 = decoder.readBit(contexts, UNIFORM_CONTEXT) << 1 | decoder.readBit(contexts, UNIFORM_CONTEXT);
|
8666 |
|
8667 | if (i1 !== 0) {
|
8668 | i = i0 + i1;
|
8669 | index += i1 * width;
|
8670 | }
|
8671 |
|
8672 | sign = this.decodeSignBit(i, j, index);
|
8673 | coefficentsSign[index] = sign;
|
8674 | coefficentsMagnitude[index] = 1;
|
8675 | this.setNeighborsSignificance(i, j, index);
|
8676 | processingFlags[index] |= firstMagnitudeBitMask;
|
8677 | index = index0;
|
8678 |
|
8679 | for (let i2 = i0; i2 <= i; i2++, index += width) {
|
8680 | bitsDecoded[index]++;
|
8681 | }
|
8682 |
|
8683 | i1++;
|
8684 | }
|
8685 |
|
8686 | for (i = i0 + i1; i < iNext; i++, index += width) {
|
8687 | if (coefficentsMagnitude[index] || (processingFlags[index] & processedMask) !== 0) {
|
8688 | continue;
|
8689 | }
|
8690 |
|
8691 | const contextLabel = labels[neighborsSignificance[index]];
|
8692 | const decision = decoder.readBit(contexts, contextLabel);
|
8693 |
|
8694 | if (decision === 1) {
|
8695 | sign = this.decodeSignBit(i, j, index);
|
8696 | coefficentsSign[index] = sign;
|
8697 | coefficentsMagnitude[index] = 1;
|
8698 | this.setNeighborsSignificance(i, j, index);
|
8699 | processingFlags[index] |= firstMagnitudeBitMask;
|
8700 | }
|
8701 |
|
8702 | bitsDecoded[index]++;
|
8703 | }
|
8704 | }
|
8705 | }
|
8706 | }
|
8707 |
|
8708 | checkSegmentationSymbol() {
|
8709 | const decoder = this.decoder;
|
8710 | const contexts = this.contexts;
|
8711 | const symbol = decoder.readBit(contexts, UNIFORM_CONTEXT) << 3 | decoder.readBit(contexts, UNIFORM_CONTEXT) << 2 | decoder.readBit(contexts, UNIFORM_CONTEXT) << 1 | decoder.readBit(contexts, UNIFORM_CONTEXT);
|
8712 |
|
8713 | if (symbol !== 0xa) {
|
8714 | throw new JpxError("Invalid segmentation symbol");
|
8715 | }
|
8716 | }
|
8717 |
|
8718 | }
|
8719 |
|
8720 | return BitModel;
|
8721 | }();
|
8722 |
|
8723 | class Transform {
|
8724 | constructor() {
|
8725 | if (this.constructor === Transform) {
|
8726 | (0, _util.unreachable)("Cannot initialize Transform.");
|
8727 | }
|
8728 | }
|
8729 |
|
8730 | calculate(subbands, u0, v0) {
|
8731 | let ll = subbands[0];
|
8732 |
|
8733 | for (let i = 1, ii = subbands.length; i < ii; i++) {
|
8734 | ll = this.iterate(ll, subbands[i], u0, v0);
|
8735 | }
|
8736 |
|
8737 | return ll;
|
8738 | }
|
8739 |
|
8740 | extend(buffer, offset, size) {
|
8741 | let i1 = offset - 1,
|
8742 | j1 = offset + 1;
|
8743 | let i2 = offset + size - 2,
|
8744 | j2 = offset + size;
|
8745 | buffer[i1--] = buffer[j1++];
|
8746 | buffer[j2++] = buffer[i2--];
|
8747 | buffer[i1--] = buffer[j1++];
|
8748 | buffer[j2++] = buffer[i2--];
|
8749 | buffer[i1--] = buffer[j1++];
|
8750 | buffer[j2++] = buffer[i2--];
|
8751 | buffer[i1] = buffer[j1];
|
8752 | buffer[j2] = buffer[i2];
|
8753 | }
|
8754 |
|
8755 | filter(x, offset, length) {
|
8756 | (0, _util.unreachable)("Abstract method `filter` called");
|
8757 | }
|
8758 |
|
8759 | iterate(ll, hl_lh_hh, u0, v0) {
|
8760 | const llWidth = ll.width,
|
8761 | llHeight = ll.height;
|
8762 | let llItems = ll.items;
|
8763 | const width = hl_lh_hh.width;
|
8764 | const height = hl_lh_hh.height;
|
8765 | const items = hl_lh_hh.items;
|
8766 | let i, j, k, l, u, v;
|
8767 |
|
8768 | for (k = 0, i = 0; i < llHeight; i++) {
|
8769 | l = i * 2 * width;
|
8770 |
|
8771 | for (j = 0; j < llWidth; j++, k++, l += 2) {
|
8772 | items[l] = llItems[k];
|
8773 | }
|
8774 | }
|
8775 |
|
8776 | llItems = ll.items = null;
|
8777 | const bufferPadding = 4;
|
8778 | const rowBuffer = new Float32Array(width + 2 * bufferPadding);
|
8779 |
|
8780 | if (width === 1) {
|
8781 | if ((u0 & 1) !== 0) {
|
8782 | for (v = 0, k = 0; v < height; v++, k += width) {
|
8783 | items[k] *= 0.5;
|
8784 | }
|
8785 | }
|
8786 | } else {
|
8787 | for (v = 0, k = 0; v < height; v++, k += width) {
|
8788 | rowBuffer.set(items.subarray(k, k + width), bufferPadding);
|
8789 | this.extend(rowBuffer, bufferPadding, width);
|
8790 | this.filter(rowBuffer, bufferPadding, width);
|
8791 | items.set(rowBuffer.subarray(bufferPadding, bufferPadding + width), k);
|
8792 | }
|
8793 | }
|
8794 |
|
8795 | let numBuffers = 16;
|
8796 | const colBuffers = [];
|
8797 |
|
8798 | for (i = 0; i < numBuffers; i++) {
|
8799 | colBuffers.push(new Float32Array(height + 2 * bufferPadding));
|
8800 | }
|
8801 |
|
8802 | let b,
|
8803 | currentBuffer = 0;
|
8804 | ll = bufferPadding + height;
|
8805 |
|
8806 | if (height === 1) {
|
8807 | if ((v0 & 1) !== 0) {
|
8808 | for (u = 0; u < width; u++) {
|
8809 | items[u] *= 0.5;
|
8810 | }
|
8811 | }
|
8812 | } else {
|
8813 | for (u = 0; u < width; u++) {
|
8814 | if (currentBuffer === 0) {
|
8815 | numBuffers = Math.min(width - u, numBuffers);
|
8816 |
|
8817 | for (k = u, l = bufferPadding; l < ll; k += width, l++) {
|
8818 | for (b = 0; b < numBuffers; b++) {
|
8819 | colBuffers[b][l] = items[k + b];
|
8820 | }
|
8821 | }
|
8822 |
|
8823 | currentBuffer = numBuffers;
|
8824 | }
|
8825 |
|
8826 | currentBuffer--;
|
8827 | const buffer = colBuffers[currentBuffer];
|
8828 | this.extend(buffer, bufferPadding, height);
|
8829 | this.filter(buffer, bufferPadding, height);
|
8830 |
|
8831 | if (currentBuffer === 0) {
|
8832 | k = u - numBuffers + 1;
|
8833 |
|
8834 | for (l = bufferPadding; l < ll; k += width, l++) {
|
8835 | for (b = 0; b < numBuffers; b++) {
|
8836 | items[k + b] = colBuffers[b][l];
|
8837 | }
|
8838 | }
|
8839 | }
|
8840 | }
|
8841 | }
|
8842 |
|
8843 | return {
|
8844 | width,
|
8845 | height,
|
8846 | items
|
8847 | };
|
8848 | }
|
8849 |
|
8850 | }
|
8851 |
|
8852 | class IrreversibleTransform extends Transform {
|
8853 | filter(x, offset, length) {
|
8854 | const len = length >> 1;
|
8855 | offset |= 0;
|
8856 | let j, n, current, next;
|
8857 | const alpha = -1.586134342059924;
|
8858 | const beta = -0.052980118572961;
|
8859 | const gamma = 0.882911075530934;
|
8860 | const delta = 0.443506852043971;
|
8861 | const K = 1.230174104914001;
|
8862 | const K_ = 1 / K;
|
8863 | j = offset - 3;
|
8864 |
|
8865 | for (n = len + 4; n--; j += 2) {
|
8866 | x[j] *= K_;
|
8867 | }
|
8868 |
|
8869 | j = offset - 2;
|
8870 | current = delta * x[j - 1];
|
8871 |
|
8872 | for (n = len + 3; n--; j += 2) {
|
8873 | next = delta * x[j + 1];
|
8874 | x[j] = K * x[j] - current - next;
|
8875 |
|
8876 | if (n--) {
|
8877 | j += 2;
|
8878 | current = delta * x[j + 1];
|
8879 | x[j] = K * x[j] - current - next;
|
8880 | } else {
|
8881 | break;
|
8882 | }
|
8883 | }
|
8884 |
|
8885 | j = offset - 1;
|
8886 | current = gamma * x[j - 1];
|
8887 |
|
8888 | for (n = len + 2; n--; j += 2) {
|
8889 | next = gamma * x[j + 1];
|
8890 | x[j] -= current + next;
|
8891 |
|
8892 | if (n--) {
|
8893 | j += 2;
|
8894 | current = gamma * x[j + 1];
|
8895 | x[j] -= current + next;
|
8896 | } else {
|
8897 | break;
|
8898 | }
|
8899 | }
|
8900 |
|
8901 | j = offset;
|
8902 | current = beta * x[j - 1];
|
8903 |
|
8904 | for (n = len + 1; n--; j += 2) {
|
8905 | next = beta * x[j + 1];
|
8906 | x[j] -= current + next;
|
8907 |
|
8908 | if (n--) {
|
8909 | j += 2;
|
8910 | current = beta * x[j + 1];
|
8911 | x[j] -= current + next;
|
8912 | } else {
|
8913 | break;
|
8914 | }
|
8915 | }
|
8916 |
|
8917 | if (len !== 0) {
|
8918 | j = offset + 1;
|
8919 | current = alpha * x[j - 1];
|
8920 |
|
8921 | for (n = len; n--; j += 2) {
|
8922 | next = alpha * x[j + 1];
|
8923 | x[j] -= current + next;
|
8924 |
|
8925 | if (n--) {
|
8926 | j += 2;
|
8927 | current = alpha * x[j + 1];
|
8928 | x[j] -= current + next;
|
8929 | } else {
|
8930 | break;
|
8931 | }
|
8932 | }
|
8933 | }
|
8934 | }
|
8935 |
|
8936 | }
|
8937 |
|
8938 | class ReversibleTransform extends Transform {
|
8939 | filter(x, offset, length) {
|
8940 | const len = length >> 1;
|
8941 | offset |= 0;
|
8942 | let j, n;
|
8943 |
|
8944 | for (j = offset, n = len + 1; n--; j += 2) {
|
8945 | x[j] -= x[j - 1] + x[j + 1] + 2 >> 2;
|
8946 | }
|
8947 |
|
8948 | for (j = offset + 1, n = len; n--; j += 2) {
|
8949 | x[j] += x[j - 1] + x[j + 1] >> 1;
|
8950 | }
|
8951 | }
|
8952 |
|
8953 | }
|
8954 |
|
8955 | })
|
8956 | ]);
|
8957 |
|
8958 |
|
8959 | var __webpack_module_cache__ = {};
|
8960 |
|
8961 |
|
8962 | function __w_pdfjs_require__(moduleId) {
|
8963 |
|
8964 | var cachedModule = __webpack_module_cache__[moduleId];
|
8965 | if (cachedModule !== undefined) {
|
8966 | return cachedModule.exports;
|
8967 | }
|
8968 |
|
8969 | var module = __webpack_module_cache__[moduleId] = {
|
8970 |
|
8971 |
|
8972 | exports: {}
|
8973 | };
|
8974 |
|
8975 |
|
8976 | __webpack_modules__[moduleId](module, module.exports, __w_pdfjs_require__);
|
8977 |
|
8978 |
|
8979 | return module.exports;
|
8980 | }
|
8981 |
|
8982 |
|
8983 | var __webpack_exports__ = {};
|
8984 |
|
8985 | (() => {
|
8986 | var exports = __webpack_exports__;
|
8987 |
|
8988 |
|
8989 | Object.defineProperty(exports, "__esModule", ({
|
8990 | value: true
|
8991 | }));
|
8992 | Object.defineProperty(exports, "Jbig2Image", ({
|
8993 | enumerable: true,
|
8994 | get: function () {
|
8995 | return _jbig.Jbig2Image;
|
8996 | }
|
8997 | }));
|
8998 | Object.defineProperty(exports, "JpegImage", ({
|
8999 | enumerable: true,
|
9000 | get: function () {
|
9001 | return _jpg.JpegImage;
|
9002 | }
|
9003 | }));
|
9004 | Object.defineProperty(exports, "JpxImage", ({
|
9005 | enumerable: true,
|
9006 | get: function () {
|
9007 | return _jpx.JpxImage;
|
9008 | }
|
9009 | }));
|
9010 | Object.defineProperty(exports, "getVerbosityLevel", ({
|
9011 | enumerable: true,
|
9012 | get: function () {
|
9013 | return _util.getVerbosityLevel;
|
9014 | }
|
9015 | }));
|
9016 | Object.defineProperty(exports, "setVerbosityLevel", ({
|
9017 | enumerable: true,
|
9018 | get: function () {
|
9019 | return _util.setVerbosityLevel;
|
9020 | }
|
9021 | }));
|
9022 |
|
9023 | var _util = __w_pdfjs_require__(1);
|
9024 |
|
9025 | var _jbig = __w_pdfjs_require__(4);
|
9026 |
|
9027 | var _jpg = __w_pdfjs_require__(10);
|
9028 |
|
9029 | var _jpx = __w_pdfjs_require__(11);
|
9030 |
|
9031 | const pdfjsVersion = '2.15.349';
|
9032 | const pdfjsBuild = 'b8aa9c622';
|
9033 | })();
|
9034 |
|
9035 | return __webpack_exports__;
|
9036 | })()
|
9037 | ;
|
9038 | });
|
9039 |
|
\ | No newline at end of file |