7718 lines
240 KiB
JavaScript
7718 lines
240 KiB
JavaScript
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/**
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* @licstart The following is the entire license notice for the
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* JavaScript code in this page
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*
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* Copyright 2024 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @licend The above is the entire license notice for the
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* JavaScript code in this page
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*/
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/**
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* pdfjsVersion = 5.4.149
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* pdfjsBuild = 9e2e9e209
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*/
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/******/ // The require scope
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/******/ var __webpack_require__ = {};
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/******/
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/************************************************************************/
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/******/ /* webpack/runtime/define property getters */
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/******/ (() => {
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/******/ // define getter functions for harmony exports
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/******/ __webpack_require__.d = (exports, definition) => {
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/******/ for(var key in definition) {
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/******/ if(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) {
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/******/ Object.defineProperty(exports, key, { enumerable: true, get: definition[key] });
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/******/ }
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/******/ }
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/******/ };
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/******/ })();
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/******/
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/******/ /* webpack/runtime/hasOwnProperty shorthand */
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/******/ (() => {
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/******/ __webpack_require__.o = (obj, prop) => (Object.prototype.hasOwnProperty.call(obj, prop))
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/******/ })();
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/******/
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/************************************************************************/
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var __webpack_exports__ = {};
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;// ./src/shared/util.js
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const isNodeJS = typeof process === "object" && process + "" === "[object process]" && !process.versions.nw && !(process.versions.electron && process.type && process.type !== "browser");
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const FONT_IDENTITY_MATRIX = (/* unused pure expression or super */ null && ([0.001, 0, 0, 0.001, 0, 0]));
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const LINE_FACTOR = 1.35;
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const LINE_DESCENT_FACTOR = 0.35;
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const BASELINE_FACTOR = LINE_DESCENT_FACTOR / LINE_FACTOR;
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const RenderingIntentFlag = {
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ANY: 0x01,
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DISPLAY: 0x02,
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PRINT: 0x04,
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SAVE: 0x08,
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ANNOTATIONS_FORMS: 0x10,
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ANNOTATIONS_STORAGE: 0x20,
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ANNOTATIONS_DISABLE: 0x40,
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IS_EDITING: 0x80,
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OPLIST: 0x100
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};
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const AnnotationMode = {
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DISABLE: 0,
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ENABLE: 1,
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ENABLE_FORMS: 2,
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ENABLE_STORAGE: 3
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};
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const util_AnnotationEditorPrefix = "pdfjs_internal_editor_";
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const AnnotationEditorType = {
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DISABLE: -1,
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NONE: 0,
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FREETEXT: 3,
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HIGHLIGHT: 9,
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STAMP: 13,
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INK: 15,
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POPUP: 16,
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SIGNATURE: 101,
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COMMENT: 102
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};
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const AnnotationEditorParamsType = {
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RESIZE: 1,
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CREATE: 2,
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FREETEXT_SIZE: 11,
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FREETEXT_COLOR: 12,
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FREETEXT_OPACITY: 13,
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INK_COLOR: 21,
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INK_THICKNESS: 22,
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INK_OPACITY: 23,
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HIGHLIGHT_COLOR: 31,
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HIGHLIGHT_THICKNESS: 32,
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HIGHLIGHT_FREE: 33,
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HIGHLIGHT_SHOW_ALL: 34,
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DRAW_STEP: 41
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};
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const PermissionFlag = {
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PRINT: 0x04,
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MODIFY_CONTENTS: 0x08,
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COPY: 0x10,
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MODIFY_ANNOTATIONS: 0x20,
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FILL_INTERACTIVE_FORMS: 0x100,
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COPY_FOR_ACCESSIBILITY: 0x200,
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ASSEMBLE: 0x400,
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PRINT_HIGH_QUALITY: 0x800
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};
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const TextRenderingMode = {
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FILL: 0,
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STROKE: 1,
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FILL_STROKE: 2,
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INVISIBLE: 3,
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FILL_ADD_TO_PATH: 4,
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STROKE_ADD_TO_PATH: 5,
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FILL_STROKE_ADD_TO_PATH: 6,
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ADD_TO_PATH: 7,
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FILL_STROKE_MASK: 3,
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ADD_TO_PATH_FLAG: 4
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};
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const util_ImageKind = {
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GRAYSCALE_1BPP: 1,
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RGB_24BPP: 2,
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RGBA_32BPP: 3
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};
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const AnnotationType = {
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TEXT: 1,
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LINK: 2,
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FREETEXT: 3,
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LINE: 4,
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SQUARE: 5,
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CIRCLE: 6,
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POLYGON: 7,
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POLYLINE: 8,
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HIGHLIGHT: 9,
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UNDERLINE: 10,
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SQUIGGLY: 11,
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STRIKEOUT: 12,
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STAMP: 13,
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CARET: 14,
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INK: 15,
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POPUP: 16,
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FILEATTACHMENT: 17,
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SOUND: 18,
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MOVIE: 19,
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WIDGET: 20,
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SCREEN: 21,
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PRINTERMARK: 22,
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TRAPNET: 23,
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WATERMARK: 24,
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THREED: 25,
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REDACT: 26
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};
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const AnnotationReplyType = {
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GROUP: "Group",
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REPLY: "R"
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};
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const AnnotationFlag = {
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INVISIBLE: 0x01,
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HIDDEN: 0x02,
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PRINT: 0x04,
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NOZOOM: 0x08,
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NOROTATE: 0x10,
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NOVIEW: 0x20,
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READONLY: 0x40,
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LOCKED: 0x80,
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TOGGLENOVIEW: 0x100,
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LOCKEDCONTENTS: 0x200
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};
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const AnnotationFieldFlag = {
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READONLY: 0x0000001,
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REQUIRED: 0x0000002,
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NOEXPORT: 0x0000004,
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MULTILINE: 0x0001000,
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PASSWORD: 0x0002000,
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NOTOGGLETOOFF: 0x0004000,
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RADIO: 0x0008000,
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PUSHBUTTON: 0x0010000,
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COMBO: 0x0020000,
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|||
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EDIT: 0x0040000,
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|||
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SORT: 0x0080000,
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|||
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FILESELECT: 0x0100000,
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|||
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MULTISELECT: 0x0200000,
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|||
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DONOTSPELLCHECK: 0x0400000,
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|||
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DONOTSCROLL: 0x0800000,
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|||
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COMB: 0x1000000,
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|||
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RICHTEXT: 0x2000000,
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|||
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RADIOSINUNISON: 0x2000000,
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|||
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COMMITONSELCHANGE: 0x4000000
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|||
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};
|
|||
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const AnnotationBorderStyleType = {
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|||
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SOLID: 1,
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|||
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DASHED: 2,
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BEVELED: 3,
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INSET: 4,
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UNDERLINE: 5
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};
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const AnnotationActionEventType = {
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|||
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E: "Mouse Enter",
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X: "Mouse Exit",
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D: "Mouse Down",
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U: "Mouse Up",
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|||
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Fo: "Focus",
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Bl: "Blur",
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|||
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PO: "PageOpen",
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|||
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PC: "PageClose",
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PV: "PageVisible",
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PI: "PageInvisible",
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|||
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K: "Keystroke",
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|||
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F: "Format",
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|||
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V: "Validate",
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|||
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C: "Calculate"
|
|||
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};
|
|||
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const DocumentActionEventType = {
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|||
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WC: "WillClose",
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|||
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WS: "WillSave",
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|||
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DS: "DidSave",
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|||
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WP: "WillPrint",
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|||
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DP: "DidPrint"
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|||
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};
|
|||
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const PageActionEventType = {
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|||
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O: "PageOpen",
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|||
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C: "PageClose"
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|||
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};
|
|||
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const VerbosityLevel = {
|
|||
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ERRORS: 0,
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|||
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WARNINGS: 1,
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|||
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INFOS: 5
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|||
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};
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|||
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const OPS = {
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|||
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dependency: 1,
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|||
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setLineWidth: 2,
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|||
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setLineCap: 3,
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setLineJoin: 4,
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|||
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setMiterLimit: 5,
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|||
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setDash: 6,
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setRenderingIntent: 7,
|
|||
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setFlatness: 8,
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|||
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setGState: 9,
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|||
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save: 10,
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|||
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restore: 11,
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|||
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transform: 12,
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|||
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moveTo: 13,
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|||
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lineTo: 14,
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curveTo: 15,
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|||
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curveTo2: 16,
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|||
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curveTo3: 17,
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|||
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closePath: 18,
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|||
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rectangle: 19,
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|||
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stroke: 20,
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|||
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closeStroke: 21,
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|||
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fill: 22,
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|||
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eoFill: 23,
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|||
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fillStroke: 24,
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|||
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eoFillStroke: 25,
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|||
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closeFillStroke: 26,
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|||
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closeEOFillStroke: 27,
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|||
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endPath: 28,
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|||
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clip: 29,
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|||
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eoClip: 30,
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|||
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beginText: 31,
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|||
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endText: 32,
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|||
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setCharSpacing: 33,
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|||
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setWordSpacing: 34,
|
|||
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setHScale: 35,
|
|||
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setLeading: 36,
|
|||
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setFont: 37,
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|||
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setTextRenderingMode: 38,
|
|||
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setTextRise: 39,
|
|||
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moveText: 40,
|
|||
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setLeadingMoveText: 41,
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|||
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setTextMatrix: 42,
|
|||
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nextLine: 43,
|
|||
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showText: 44,
|
|||
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showSpacedText: 45,
|
|||
|
|
nextLineShowText: 46,
|
|||
|
|
nextLineSetSpacingShowText: 47,
|
|||
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setCharWidth: 48,
|
|||
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|
setCharWidthAndBounds: 49,
|
|||
|
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setStrokeColorSpace: 50,
|
|||
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setFillColorSpace: 51,
|
|||
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|
setStrokeColor: 52,
|
|||
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|
setStrokeColorN: 53,
|
|||
|
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setFillColor: 54,
|
|||
|
|
setFillColorN: 55,
|
|||
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setStrokeGray: 56,
|
|||
|
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setFillGray: 57,
|
|||
|
|
setStrokeRGBColor: 58,
|
|||
|
|
setFillRGBColor: 59,
|
|||
|
|
setStrokeCMYKColor: 60,
|
|||
|
|
setFillCMYKColor: 61,
|
|||
|
|
shadingFill: 62,
|
|||
|
|
beginInlineImage: 63,
|
|||
|
|
beginImageData: 64,
|
|||
|
|
endInlineImage: 65,
|
|||
|
|
paintXObject: 66,
|
|||
|
|
markPoint: 67,
|
|||
|
|
markPointProps: 68,
|
|||
|
|
beginMarkedContent: 69,
|
|||
|
|
beginMarkedContentProps: 70,
|
|||
|
|
endMarkedContent: 71,
|
|||
|
|
beginCompat: 72,
|
|||
|
|
endCompat: 73,
|
|||
|
|
paintFormXObjectBegin: 74,
|
|||
|
|
paintFormXObjectEnd: 75,
|
|||
|
|
beginGroup: 76,
|
|||
|
|
endGroup: 77,
|
|||
|
|
beginAnnotation: 80,
|
|||
|
|
endAnnotation: 81,
|
|||
|
|
paintImageMaskXObject: 83,
|
|||
|
|
paintImageMaskXObjectGroup: 84,
|
|||
|
|
paintImageXObject: 85,
|
|||
|
|
paintInlineImageXObject: 86,
|
|||
|
|
paintInlineImageXObjectGroup: 87,
|
|||
|
|
paintImageXObjectRepeat: 88,
|
|||
|
|
paintImageMaskXObjectRepeat: 89,
|
|||
|
|
paintSolidColorImageMask: 90,
|
|||
|
|
constructPath: 91,
|
|||
|
|
setStrokeTransparent: 92,
|
|||
|
|
setFillTransparent: 93,
|
|||
|
|
rawFillPath: 94
|
|||
|
|
};
|
|||
|
|
const DrawOPS = {
|
|||
|
|
moveTo: 0,
|
|||
|
|
lineTo: 1,
|
|||
|
|
curveTo: 2,
|
|||
|
|
closePath: 3
|
|||
|
|
};
|
|||
|
|
const PasswordResponses = {
|
|||
|
|
NEED_PASSWORD: 1,
|
|||
|
|
INCORRECT_PASSWORD: 2
|
|||
|
|
};
|
|||
|
|
let verbosity = VerbosityLevel.WARNINGS;
|
|||
|
|
function setVerbosityLevel(level) {
|
|||
|
|
if (Number.isInteger(level)) {
|
|||
|
|
verbosity = level;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function getVerbosityLevel() {
|
|||
|
|
return verbosity;
|
|||
|
|
}
|
|||
|
|
function info(msg) {
|
|||
|
|
if (verbosity >= VerbosityLevel.INFOS) {
|
|||
|
|
console.log(`Info: ${msg}`);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function util_warn(msg) {
|
|||
|
|
if (verbosity >= VerbosityLevel.WARNINGS) {
|
|||
|
|
console.log(`Warning: ${msg}`);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function unreachable(msg) {
|
|||
|
|
throw new Error(msg);
|
|||
|
|
}
|
|||
|
|
function util_assert(cond, msg) {
|
|||
|
|
if (!cond) {
|
|||
|
|
unreachable(msg);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function _isValidProtocol(url) {
|
|||
|
|
switch (url?.protocol) {
|
|||
|
|
case "http:":
|
|||
|
|
case "https:":
|
|||
|
|
case "ftp:":
|
|||
|
|
case "mailto:":
|
|||
|
|
case "tel:":
|
|||
|
|
return true;
|
|||
|
|
default:
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function createValidAbsoluteUrl(url, baseUrl = null, options = null) {
|
|||
|
|
if (!url) {
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
if (options && typeof url === "string") {
|
|||
|
|
if (options.addDefaultProtocol && url.startsWith("www.")) {
|
|||
|
|
const dots = url.match(/\./g);
|
|||
|
|
if (dots?.length >= 2) {
|
|||
|
|
url = `http://${url}`;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (options.tryConvertEncoding) {
|
|||
|
|
try {
|
|||
|
|
url = stringToUTF8String(url);
|
|||
|
|
} catch {}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const absoluteUrl = baseUrl ? URL.parse(url, baseUrl) : URL.parse(url);
|
|||
|
|
return _isValidProtocol(absoluteUrl) ? absoluteUrl : null;
|
|||
|
|
}
|
|||
|
|
function updateUrlHash(url, hash, allowRel = false) {
|
|||
|
|
const res = URL.parse(url);
|
|||
|
|
if (res) {
|
|||
|
|
res.hash = hash;
|
|||
|
|
return res.href;
|
|||
|
|
}
|
|||
|
|
if (allowRel && createValidAbsoluteUrl(url, "http://example.com")) {
|
|||
|
|
return url.split("#", 1)[0] + `${hash ? `#${hash}` : ""}`;
|
|||
|
|
}
|
|||
|
|
return "";
|
|||
|
|
}
|
|||
|
|
function shadow(obj, prop, value, nonSerializable = false) {
|
|||
|
|
Object.defineProperty(obj, prop, {
|
|||
|
|
value,
|
|||
|
|
enumerable: !nonSerializable,
|
|||
|
|
configurable: true,
|
|||
|
|
writable: false
|
|||
|
|
});
|
|||
|
|
return value;
|
|||
|
|
}
|
|||
|
|
const BaseException = function BaseExceptionClosure() {
|
|||
|
|
function BaseException(message, name) {
|
|||
|
|
this.message = message;
|
|||
|
|
this.name = name;
|
|||
|
|
}
|
|||
|
|
BaseException.prototype = new Error();
|
|||
|
|
BaseException.constructor = BaseException;
|
|||
|
|
return BaseException;
|
|||
|
|
}();
|
|||
|
|
class PasswordException extends BaseException {
|
|||
|
|
constructor(msg, code) {
|
|||
|
|
super(msg, "PasswordException");
|
|||
|
|
this.code = code;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class UnknownErrorException extends BaseException {
|
|||
|
|
constructor(msg, details) {
|
|||
|
|
super(msg, "UnknownErrorException");
|
|||
|
|
this.details = details;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class InvalidPDFException extends BaseException {
|
|||
|
|
constructor(msg) {
|
|||
|
|
super(msg, "InvalidPDFException");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class ResponseException extends BaseException {
|
|||
|
|
constructor(msg, status, missing) {
|
|||
|
|
super(msg, "ResponseException");
|
|||
|
|
this.status = status;
|
|||
|
|
this.missing = missing;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class FormatError extends BaseException {
|
|||
|
|
constructor(msg) {
|
|||
|
|
super(msg, "FormatError");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class AbortException extends BaseException {
|
|||
|
|
constructor(msg) {
|
|||
|
|
super(msg, "AbortException");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function bytesToString(bytes) {
|
|||
|
|
if (typeof bytes !== "object" || bytes?.length === undefined) {
|
|||
|
|
unreachable("Invalid argument for bytesToString");
|
|||
|
|
}
|
|||
|
|
const length = bytes.length;
|
|||
|
|
const MAX_ARGUMENT_COUNT = 8192;
|
|||
|
|
if (length < MAX_ARGUMENT_COUNT) {
|
|||
|
|
return String.fromCharCode.apply(null, bytes);
|
|||
|
|
}
|
|||
|
|
const strBuf = [];
|
|||
|
|
for (let i = 0; i < length; i += MAX_ARGUMENT_COUNT) {
|
|||
|
|
const chunkEnd = Math.min(i + MAX_ARGUMENT_COUNT, length);
|
|||
|
|
const chunk = bytes.subarray(i, chunkEnd);
|
|||
|
|
strBuf.push(String.fromCharCode.apply(null, chunk));
|
|||
|
|
}
|
|||
|
|
return strBuf.join("");
|
|||
|
|
}
|
|||
|
|
function stringToBytes(str) {
|
|||
|
|
if (typeof str !== "string") {
|
|||
|
|
unreachable("Invalid argument for stringToBytes");
|
|||
|
|
}
|
|||
|
|
const length = str.length;
|
|||
|
|
const bytes = new Uint8Array(length);
|
|||
|
|
for (let i = 0; i < length; ++i) {
|
|||
|
|
bytes[i] = str.charCodeAt(i) & 0xff;
|
|||
|
|
}
|
|||
|
|
return bytes;
|
|||
|
|
}
|
|||
|
|
function string32(value) {
|
|||
|
|
return String.fromCharCode(value >> 24 & 0xff, value >> 16 & 0xff, value >> 8 & 0xff, value & 0xff);
|
|||
|
|
}
|
|||
|
|
function util_objectSize(obj) {
|
|||
|
|
return Object.keys(obj).length;
|
|||
|
|
}
|
|||
|
|
function isLittleEndian() {
|
|||
|
|
const buffer8 = new Uint8Array(4);
|
|||
|
|
buffer8[0] = 1;
|
|||
|
|
const view32 = new Uint32Array(buffer8.buffer, 0, 1);
|
|||
|
|
return view32[0] === 1;
|
|||
|
|
}
|
|||
|
|
function isEvalSupported() {
|
|||
|
|
try {
|
|||
|
|
new Function("");
|
|||
|
|
return true;
|
|||
|
|
} catch {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class util_FeatureTest {
|
|||
|
|
static get isLittleEndian() {
|
|||
|
|
return shadow(this, "isLittleEndian", isLittleEndian());
|
|||
|
|
}
|
|||
|
|
static get isEvalSupported() {
|
|||
|
|
return shadow(this, "isEvalSupported", isEvalSupported());
|
|||
|
|
}
|
|||
|
|
static get isOffscreenCanvasSupported() {
|
|||
|
|
return shadow(this, "isOffscreenCanvasSupported", typeof OffscreenCanvas !== "undefined");
|
|||
|
|
}
|
|||
|
|
static get isImageDecoderSupported() {
|
|||
|
|
return shadow(this, "isImageDecoderSupported", typeof ImageDecoder !== "undefined");
|
|||
|
|
}
|
|||
|
|
static get platform() {
|
|||
|
|
const {
|
|||
|
|
platform,
|
|||
|
|
userAgent
|
|||
|
|
} = navigator;
|
|||
|
|
return shadow(this, "platform", {
|
|||
|
|
isAndroid: userAgent.includes("Android"),
|
|||
|
|
isLinux: platform.includes("Linux"),
|
|||
|
|
isMac: platform.includes("Mac"),
|
|||
|
|
isWindows: platform.includes("Win"),
|
|||
|
|
isFirefox: userAgent.includes("Firefox")
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
static get isCSSRoundSupported() {
|
|||
|
|
return shadow(this, "isCSSRoundSupported", globalThis.CSS?.supports?.("width: round(1.5px, 1px)"));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const util_hexNumbers = Array.from(Array(256).keys(), n => n.toString(16).padStart(2, "0"));
|
|||
|
|
class util_Util {
|
|||
|
|
static makeHexColor(r, g, b) {
|
|||
|
|
return `#${util_hexNumbers[r]}${util_hexNumbers[g]}${util_hexNumbers[b]}`;
|
|||
|
|
}
|
|||
|
|
static domMatrixToTransform(dm) {
|
|||
|
|
return [dm.a, dm.b, dm.c, dm.d, dm.e, dm.f];
|
|||
|
|
}
|
|||
|
|
static scaleMinMax(transform, minMax) {
|
|||
|
|
let temp;
|
|||
|
|
if (transform[0]) {
|
|||
|
|
if (transform[0] < 0) {
|
|||
|
|
temp = minMax[0];
|
|||
|
|
minMax[0] = minMax[2];
|
|||
|
|
minMax[2] = temp;
|
|||
|
|
}
|
|||
|
|
minMax[0] *= transform[0];
|
|||
|
|
minMax[2] *= transform[0];
|
|||
|
|
if (transform[3] < 0) {
|
|||
|
|
temp = minMax[1];
|
|||
|
|
minMax[1] = minMax[3];
|
|||
|
|
minMax[3] = temp;
|
|||
|
|
}
|
|||
|
|
minMax[1] *= transform[3];
|
|||
|
|
minMax[3] *= transform[3];
|
|||
|
|
} else {
|
|||
|
|
temp = minMax[0];
|
|||
|
|
minMax[0] = minMax[1];
|
|||
|
|
minMax[1] = temp;
|
|||
|
|
temp = minMax[2];
|
|||
|
|
minMax[2] = minMax[3];
|
|||
|
|
minMax[3] = temp;
|
|||
|
|
if (transform[1] < 0) {
|
|||
|
|
temp = minMax[1];
|
|||
|
|
minMax[1] = minMax[3];
|
|||
|
|
minMax[3] = temp;
|
|||
|
|
}
|
|||
|
|
minMax[1] *= transform[1];
|
|||
|
|
minMax[3] *= transform[1];
|
|||
|
|
if (transform[2] < 0) {
|
|||
|
|
temp = minMax[0];
|
|||
|
|
minMax[0] = minMax[2];
|
|||
|
|
minMax[2] = temp;
|
|||
|
|
}
|
|||
|
|
minMax[0] *= transform[2];
|
|||
|
|
minMax[2] *= transform[2];
|
|||
|
|
}
|
|||
|
|
minMax[0] += transform[4];
|
|||
|
|
minMax[1] += transform[5];
|
|||
|
|
minMax[2] += transform[4];
|
|||
|
|
minMax[3] += transform[5];
|
|||
|
|
}
|
|||
|
|
static transform(m1, m2) {
|
|||
|
|
return [m1[0] * m2[0] + m1[2] * m2[1], m1[1] * m2[0] + m1[3] * m2[1], m1[0] * m2[2] + m1[2] * m2[3], m1[1] * m2[2] + m1[3] * m2[3], m1[0] * m2[4] + m1[2] * m2[5] + m1[4], m1[1] * m2[4] + m1[3] * m2[5] + m1[5]];
|
|||
|
|
}
|
|||
|
|
static multiplyByDOMMatrix(m, md) {
|
|||
|
|
return [m[0] * md.a + m[2] * md.b, m[1] * md.a + m[3] * md.b, m[0] * md.c + m[2] * md.d, m[1] * md.c + m[3] * md.d, m[0] * md.e + m[2] * md.f + m[4], m[1] * md.e + m[3] * md.f + m[5]];
|
|||
|
|
}
|
|||
|
|
static applyTransform(p, m, pos = 0) {
|
|||
|
|
const p0 = p[pos];
|
|||
|
|
const p1 = p[pos + 1];
|
|||
|
|
p[pos] = p0 * m[0] + p1 * m[2] + m[4];
|
|||
|
|
p[pos + 1] = p0 * m[1] + p1 * m[3] + m[5];
|
|||
|
|
}
|
|||
|
|
static applyTransformToBezier(p, transform, pos = 0) {
|
|||
|
|
const m0 = transform[0];
|
|||
|
|
const m1 = transform[1];
|
|||
|
|
const m2 = transform[2];
|
|||
|
|
const m3 = transform[3];
|
|||
|
|
const m4 = transform[4];
|
|||
|
|
const m5 = transform[5];
|
|||
|
|
for (let i = 0; i < 6; i += 2) {
|
|||
|
|
const pI = p[pos + i];
|
|||
|
|
const pI1 = p[pos + i + 1];
|
|||
|
|
p[pos + i] = pI * m0 + pI1 * m2 + m4;
|
|||
|
|
p[pos + i + 1] = pI * m1 + pI1 * m3 + m5;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
static applyInverseTransform(p, m) {
|
|||
|
|
const p0 = p[0];
|
|||
|
|
const p1 = p[1];
|
|||
|
|
const d = m[0] * m[3] - m[1] * m[2];
|
|||
|
|
p[0] = (p0 * m[3] - p1 * m[2] + m[2] * m[5] - m[4] * m[3]) / d;
|
|||
|
|
p[1] = (-p0 * m[1] + p1 * m[0] + m[4] * m[1] - m[5] * m[0]) / d;
|
|||
|
|
}
|
|||
|
|
static axialAlignedBoundingBox(rect, transform, output) {
|
|||
|
|
const m0 = transform[0];
|
|||
|
|
const m1 = transform[1];
|
|||
|
|
const m2 = transform[2];
|
|||
|
|
const m3 = transform[3];
|
|||
|
|
const m4 = transform[4];
|
|||
|
|
const m5 = transform[5];
|
|||
|
|
const r0 = rect[0];
|
|||
|
|
const r1 = rect[1];
|
|||
|
|
const r2 = rect[2];
|
|||
|
|
const r3 = rect[3];
|
|||
|
|
let a0 = m0 * r0 + m4;
|
|||
|
|
let a2 = a0;
|
|||
|
|
let a1 = m0 * r2 + m4;
|
|||
|
|
let a3 = a1;
|
|||
|
|
let b0 = m3 * r1 + m5;
|
|||
|
|
let b2 = b0;
|
|||
|
|
let b1 = m3 * r3 + m5;
|
|||
|
|
let b3 = b1;
|
|||
|
|
if (m1 !== 0 || m2 !== 0) {
|
|||
|
|
const m1r0 = m1 * r0;
|
|||
|
|
const m1r2 = m1 * r2;
|
|||
|
|
const m2r1 = m2 * r1;
|
|||
|
|
const m2r3 = m2 * r3;
|
|||
|
|
a0 += m2r1;
|
|||
|
|
a3 += m2r1;
|
|||
|
|
a1 += m2r3;
|
|||
|
|
a2 += m2r3;
|
|||
|
|
b0 += m1r0;
|
|||
|
|
b3 += m1r0;
|
|||
|
|
b1 += m1r2;
|
|||
|
|
b2 += m1r2;
|
|||
|
|
}
|
|||
|
|
output[0] = Math.min(output[0], a0, a1, a2, a3);
|
|||
|
|
output[1] = Math.min(output[1], b0, b1, b2, b3);
|
|||
|
|
output[2] = Math.max(output[2], a0, a1, a2, a3);
|
|||
|
|
output[3] = Math.max(output[3], b0, b1, b2, b3);
|
|||
|
|
}
|
|||
|
|
static inverseTransform(m) {
|
|||
|
|
const d = m[0] * m[3] - m[1] * m[2];
|
|||
|
|
return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d, (m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d];
|
|||
|
|
}
|
|||
|
|
static singularValueDecompose2dScale(matrix, output) {
|
|||
|
|
const m0 = matrix[0];
|
|||
|
|
const m1 = matrix[1];
|
|||
|
|
const m2 = matrix[2];
|
|||
|
|
const m3 = matrix[3];
|
|||
|
|
const a = m0 ** 2 + m1 ** 2;
|
|||
|
|
const b = m0 * m2 + m1 * m3;
|
|||
|
|
const c = m2 ** 2 + m3 ** 2;
|
|||
|
|
const first = (a + c) / 2;
|
|||
|
|
const second = Math.sqrt(first ** 2 - (a * c - b ** 2));
|
|||
|
|
output[0] = Math.sqrt(first + second || 1);
|
|||
|
|
output[1] = Math.sqrt(first - second || 1);
|
|||
|
|
}
|
|||
|
|
static normalizeRect(rect) {
|
|||
|
|
const r = rect.slice(0);
|
|||
|
|
if (rect[0] > rect[2]) {
|
|||
|
|
r[0] = rect[2];
|
|||
|
|
r[2] = rect[0];
|
|||
|
|
}
|
|||
|
|
if (rect[1] > rect[3]) {
|
|||
|
|
r[1] = rect[3];
|
|||
|
|
r[3] = rect[1];
|
|||
|
|
}
|
|||
|
|
return r;
|
|||
|
|
}
|
|||
|
|
static intersect(rect1, rect2) {
|
|||
|
|
const xLow = Math.max(Math.min(rect1[0], rect1[2]), Math.min(rect2[0], rect2[2]));
|
|||
|
|
const xHigh = Math.min(Math.max(rect1[0], rect1[2]), Math.max(rect2[0], rect2[2]));
|
|||
|
|
if (xLow > xHigh) {
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
const yLow = Math.max(Math.min(rect1[1], rect1[3]), Math.min(rect2[1], rect2[3]));
|
|||
|
|
const yHigh = Math.min(Math.max(rect1[1], rect1[3]), Math.max(rect2[1], rect2[3]));
|
|||
|
|
if (yLow > yHigh) {
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
return [xLow, yLow, xHigh, yHigh];
|
|||
|
|
}
|
|||
|
|
static pointBoundingBox(x, y, minMax) {
|
|||
|
|
minMax[0] = Math.min(minMax[0], x);
|
|||
|
|
minMax[1] = Math.min(minMax[1], y);
|
|||
|
|
minMax[2] = Math.max(minMax[2], x);
|
|||
|
|
minMax[3] = Math.max(minMax[3], y);
|
|||
|
|
}
|
|||
|
|
static rectBoundingBox(x0, y0, x1, y1, minMax) {
|
|||
|
|
minMax[0] = Math.min(minMax[0], x0, x1);
|
|||
|
|
minMax[1] = Math.min(minMax[1], y0, y1);
|
|||
|
|
minMax[2] = Math.max(minMax[2], x0, x1);
|
|||
|
|
minMax[3] = Math.max(minMax[3], y0, y1);
|
|||
|
|
}
|
|||
|
|
static #getExtremumOnCurve(x0, x1, x2, x3, y0, y1, y2, y3, t, minMax) {
|
|||
|
|
if (t <= 0 || t >= 1) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
const mt = 1 - t;
|
|||
|
|
const tt = t * t;
|
|||
|
|
const ttt = tt * t;
|
|||
|
|
const x = mt * (mt * (mt * x0 + 3 * t * x1) + 3 * tt * x2) + ttt * x3;
|
|||
|
|
const y = mt * (mt * (mt * y0 + 3 * t * y1) + 3 * tt * y2) + ttt * y3;
|
|||
|
|
minMax[0] = Math.min(minMax[0], x);
|
|||
|
|
minMax[1] = Math.min(minMax[1], y);
|
|||
|
|
minMax[2] = Math.max(minMax[2], x);
|
|||
|
|
minMax[3] = Math.max(minMax[3], y);
|
|||
|
|
}
|
|||
|
|
static #getExtremum(x0, x1, x2, x3, y0, y1, y2, y3, a, b, c, minMax) {
|
|||
|
|
if (Math.abs(a) < 1e-12) {
|
|||
|
|
if (Math.abs(b) >= 1e-12) {
|
|||
|
|
this.#getExtremumOnCurve(x0, x1, x2, x3, y0, y1, y2, y3, -c / b, minMax);
|
|||
|
|
}
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
const delta = b ** 2 - 4 * c * a;
|
|||
|
|
if (delta < 0) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
const sqrtDelta = Math.sqrt(delta);
|
|||
|
|
const a2 = 2 * a;
|
|||
|
|
this.#getExtremumOnCurve(x0, x1, x2, x3, y0, y1, y2, y3, (-b + sqrtDelta) / a2, minMax);
|
|||
|
|
this.#getExtremumOnCurve(x0, x1, x2, x3, y0, y1, y2, y3, (-b - sqrtDelta) / a2, minMax);
|
|||
|
|
}
|
|||
|
|
static bezierBoundingBox(x0, y0, x1, y1, x2, y2, x3, y3, minMax) {
|
|||
|
|
minMax[0] = Math.min(minMax[0], x0, x3);
|
|||
|
|
minMax[1] = Math.min(minMax[1], y0, y3);
|
|||
|
|
minMax[2] = Math.max(minMax[2], x0, x3);
|
|||
|
|
minMax[3] = Math.max(minMax[3], y0, y3);
|
|||
|
|
this.#getExtremum(x0, x1, x2, x3, y0, y1, y2, y3, 3 * (-x0 + 3 * (x1 - x2) + x3), 6 * (x0 - 2 * x1 + x2), 3 * (x1 - x0), minMax);
|
|||
|
|
this.#getExtremum(x0, x1, x2, x3, y0, y1, y2, y3, 3 * (-y0 + 3 * (y1 - y2) + y3), 6 * (y0 - 2 * y1 + y2), 3 * (y1 - y0), minMax);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const PDFStringTranslateTable = (/* unused pure expression or super */ null && ([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2d8, 0x2c7, 0x2c6, 0x2d9, 0x2dd, 0x2db, 0x2da, 0x2dc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014, 0x2013, 0x192, 0x2044, 0x2039, 0x203a, 0x2212, 0x2030, 0x201e, 0x201c, 0x201d, 0x2018, 0x2019, 0x201a, 0x2122, 0xfb01, 0xfb02, 0x141, 0x152, 0x160, 0x178, 0x17d, 0x131, 0x142, 0x153, 0x161, 0x17e, 0, 0x20ac]));
|
|||
|
|
function util_stringToPDFString(str, keepEscapeSequence = false) {
|
|||
|
|
if (str[0] >= "\xEF") {
|
|||
|
|
let encoding;
|
|||
|
|
if (str[0] === "\xFE" && str[1] === "\xFF") {
|
|||
|
|
encoding = "utf-16be";
|
|||
|
|
if (str.length % 2 === 1) {
|
|||
|
|
str = str.slice(0, -1);
|
|||
|
|
}
|
|||
|
|
} else if (str[0] === "\xFF" && str[1] === "\xFE") {
|
|||
|
|
encoding = "utf-16le";
|
|||
|
|
if (str.length % 2 === 1) {
|
|||
|
|
str = str.slice(0, -1);
|
|||
|
|
}
|
|||
|
|
} else if (str[0] === "\xEF" && str[1] === "\xBB" && str[2] === "\xBF") {
|
|||
|
|
encoding = "utf-8";
|
|||
|
|
}
|
|||
|
|
if (encoding) {
|
|||
|
|
try {
|
|||
|
|
const decoder = new TextDecoder(encoding, {
|
|||
|
|
fatal: true
|
|||
|
|
});
|
|||
|
|
const buffer = stringToBytes(str);
|
|||
|
|
const decoded = decoder.decode(buffer);
|
|||
|
|
if (keepEscapeSequence || !decoded.includes("\x1b")) {
|
|||
|
|
return decoded;
|
|||
|
|
}
|
|||
|
|
return decoded.replaceAll(/\x1b[^\x1b]*(?:\x1b|$)/g, "");
|
|||
|
|
} catch (ex) {
|
|||
|
|
util_warn(`stringToPDFString: "${ex}".`);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const strBuf = [];
|
|||
|
|
for (let i = 0, ii = str.length; i < ii; i++) {
|
|||
|
|
const charCode = str.charCodeAt(i);
|
|||
|
|
if (!keepEscapeSequence && charCode === 0x1b) {
|
|||
|
|
while (++i < ii && str.charCodeAt(i) !== 0x1b) {}
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
const code = PDFStringTranslateTable[charCode];
|
|||
|
|
strBuf.push(code ? String.fromCharCode(code) : str.charAt(i));
|
|||
|
|
}
|
|||
|
|
return strBuf.join("");
|
|||
|
|
}
|
|||
|
|
function stringToUTF8String(str) {
|
|||
|
|
return decodeURIComponent(escape(str));
|
|||
|
|
}
|
|||
|
|
function utf8StringToString(str) {
|
|||
|
|
return unescape(encodeURIComponent(str));
|
|||
|
|
}
|
|||
|
|
function isArrayEqual(arr1, arr2) {
|
|||
|
|
if (arr1.length !== arr2.length) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
for (let i = 0, ii = arr1.length; i < ii; i++) {
|
|||
|
|
if (arr1[i] !== arr2[i]) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
function getModificationDate(date = new Date()) {
|
|||
|
|
if (!(date instanceof Date)) {
|
|||
|
|
date = new Date(date);
|
|||
|
|
}
|
|||
|
|
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")];
|
|||
|
|
return buffer.join("");
|
|||
|
|
}
|
|||
|
|
let NormalizeRegex = null;
|
|||
|
|
let NormalizationMap = null;
|
|||
|
|
function normalizeUnicode(str) {
|
|||
|
|
if (!NormalizeRegex) {
|
|||
|
|
NormalizeRegex = /([\u00a0\u00b5\u037e\u0eb3\u2000-\u200a\u202f\u2126\ufb00-\ufb04\ufb06\ufb20-\ufb36\ufb38-\ufb3c\ufb3e\ufb40-\ufb41\ufb43-\ufb44\ufb46-\ufba1\ufba4-\ufba9\ufbae-\ufbb1\ufbd3-\ufbdc\ufbde-\ufbe7\ufbea-\ufbf8\ufbfc-\ufbfd\ufc00-\ufc5d\ufc64-\ufcf1\ufcf5-\ufd3d\ufd88\ufdf4\ufdfa-\ufdfb\ufe71\ufe77\ufe79\ufe7b\ufe7d]+)|(\ufb05+)/gu;
|
|||
|
|
NormalizationMap = new Map([["ſt", "ſt"]]);
|
|||
|
|
}
|
|||
|
|
return str.replaceAll(NormalizeRegex, (_, p1, p2) => p1 ? p1.normalize("NFKC") : NormalizationMap.get(p2));
|
|||
|
|
}
|
|||
|
|
function getUuid() {
|
|||
|
|
if (typeof crypto.randomUUID === "function") {
|
|||
|
|
return crypto.randomUUID();
|
|||
|
|
}
|
|||
|
|
const buf = new Uint8Array(32);
|
|||
|
|
crypto.getRandomValues(buf);
|
|||
|
|
return bytesToString(buf);
|
|||
|
|
}
|
|||
|
|
const AnnotationPrefix = "pdfjs_internal_id_";
|
|||
|
|
function _isValidExplicitDest(validRef, validName, dest) {
|
|||
|
|
if (!Array.isArray(dest) || dest.length < 2) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
const [page, zoom, ...args] = dest;
|
|||
|
|
if (!validRef(page) && !Number.isInteger(page)) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
if (!validName(zoom)) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
const argsLen = args.length;
|
|||
|
|
let allowNull = true;
|
|||
|
|
switch (zoom.name) {
|
|||
|
|
case "XYZ":
|
|||
|
|
if (argsLen < 2 || argsLen > 3) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case "Fit":
|
|||
|
|
case "FitB":
|
|||
|
|
return argsLen === 0;
|
|||
|
|
case "FitH":
|
|||
|
|
case "FitBH":
|
|||
|
|
case "FitV":
|
|||
|
|
case "FitBV":
|
|||
|
|
if (argsLen > 1) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case "FitR":
|
|||
|
|
if (argsLen !== 4) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
allowNull = false;
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
for (const arg of args) {
|
|||
|
|
if (typeof arg === "number" || allowNull && arg === null) {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
function MathClamp(v, min, max) {
|
|||
|
|
return Math.min(Math.max(v, min), max);
|
|||
|
|
}
|
|||
|
|
function toHexUtil(arr) {
|
|||
|
|
if (Uint8Array.prototype.toHex) {
|
|||
|
|
return arr.toHex();
|
|||
|
|
}
|
|||
|
|
return Array.from(arr, num => util_hexNumbers[num]).join("");
|
|||
|
|
}
|
|||
|
|
function toBase64Util(arr) {
|
|||
|
|
if (Uint8Array.prototype.toBase64) {
|
|||
|
|
return arr.toBase64();
|
|||
|
|
}
|
|||
|
|
return btoa(bytesToString(arr));
|
|||
|
|
}
|
|||
|
|
function fromBase64Util(str) {
|
|||
|
|
if (Uint8Array.fromBase64) {
|
|||
|
|
return Uint8Array.fromBase64(str);
|
|||
|
|
}
|
|||
|
|
return stringToBytes(atob(str));
|
|||
|
|
}
|
|||
|
|
if (typeof Promise.try !== "function") {
|
|||
|
|
Promise.try = function (fn, ...args) {
|
|||
|
|
return new Promise(resolve => {
|
|||
|
|
resolve(fn(...args));
|
|||
|
|
});
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
if (typeof Math.sumPrecise !== "function") {
|
|||
|
|
Math.sumPrecise = function (numbers) {
|
|||
|
|
return numbers.reduce((a, b) => a + b, 0);
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./src/core/primitives.js
|
|||
|
|
|
|||
|
|
const CIRCULAR_REF = Symbol("CIRCULAR_REF");
|
|||
|
|
const EOF = Symbol("EOF");
|
|||
|
|
let CmdCache = Object.create(null);
|
|||
|
|
let NameCache = Object.create(null);
|
|||
|
|
let RefCache = Object.create(null);
|
|||
|
|
function clearPrimitiveCaches() {
|
|||
|
|
CmdCache = Object.create(null);
|
|||
|
|
NameCache = Object.create(null);
|
|||
|
|
RefCache = Object.create(null);
|
|||
|
|
}
|
|||
|
|
class Name {
|
|||
|
|
constructor(name) {
|
|||
|
|
this.name = name;
|
|||
|
|
}
|
|||
|
|
static get(name) {
|
|||
|
|
return NameCache[name] ||= new Name(name);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class Cmd {
|
|||
|
|
constructor(cmd) {
|
|||
|
|
this.cmd = cmd;
|
|||
|
|
}
|
|||
|
|
static get(cmd) {
|
|||
|
|
return CmdCache[cmd] ||= new Cmd(cmd);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const nonSerializable = function nonSerializableClosure() {
|
|||
|
|
return nonSerializable;
|
|||
|
|
};
|
|||
|
|
class primitives_Dict {
|
|||
|
|
constructor(xref = null) {
|
|||
|
|
this._map = new Map();
|
|||
|
|
this.xref = xref;
|
|||
|
|
this.objId = null;
|
|||
|
|
this.suppressEncryption = false;
|
|||
|
|
this.__nonSerializable__ = nonSerializable;
|
|||
|
|
}
|
|||
|
|
assignXref(newXref) {
|
|||
|
|
this.xref = newXref;
|
|||
|
|
}
|
|||
|
|
get size() {
|
|||
|
|
return this._map.size;
|
|||
|
|
}
|
|||
|
|
get(key1, key2, key3) {
|
|||
|
|
let value = this._map.get(key1);
|
|||
|
|
if (value === undefined && key2 !== undefined) {
|
|||
|
|
value = this._map.get(key2);
|
|||
|
|
if (value === undefined && key3 !== undefined) {
|
|||
|
|
value = this._map.get(key3);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (value instanceof primitives_Ref && this.xref) {
|
|||
|
|
return this.xref.fetch(value, this.suppressEncryption);
|
|||
|
|
}
|
|||
|
|
return value;
|
|||
|
|
}
|
|||
|
|
async getAsync(key1, key2, key3) {
|
|||
|
|
let value = this._map.get(key1);
|
|||
|
|
if (value === undefined && key2 !== undefined) {
|
|||
|
|
value = this._map.get(key2);
|
|||
|
|
if (value === undefined && key3 !== undefined) {
|
|||
|
|
value = this._map.get(key3);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (value instanceof primitives_Ref && this.xref) {
|
|||
|
|
return this.xref.fetchAsync(value, this.suppressEncryption);
|
|||
|
|
}
|
|||
|
|
return value;
|
|||
|
|
}
|
|||
|
|
getArray(key1, key2, key3) {
|
|||
|
|
let value = this._map.get(key1);
|
|||
|
|
if (value === undefined && key2 !== undefined) {
|
|||
|
|
value = this._map.get(key2);
|
|||
|
|
if (value === undefined && key3 !== undefined) {
|
|||
|
|
value = this._map.get(key3);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (value instanceof primitives_Ref && this.xref) {
|
|||
|
|
value = this.xref.fetch(value, this.suppressEncryption);
|
|||
|
|
}
|
|||
|
|
if (Array.isArray(value)) {
|
|||
|
|
value = value.slice();
|
|||
|
|
for (let i = 0, ii = value.length; i < ii; i++) {
|
|||
|
|
if (value[i] instanceof primitives_Ref && this.xref) {
|
|||
|
|
value[i] = this.xref.fetch(value[i], this.suppressEncryption);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return value;
|
|||
|
|
}
|
|||
|
|
getRaw(key) {
|
|||
|
|
return this._map.get(key);
|
|||
|
|
}
|
|||
|
|
getKeys() {
|
|||
|
|
return [...this._map.keys()];
|
|||
|
|
}
|
|||
|
|
getRawValues() {
|
|||
|
|
return [...this._map.values()];
|
|||
|
|
}
|
|||
|
|
set(key, value) {
|
|||
|
|
this._map.set(key, value);
|
|||
|
|
}
|
|||
|
|
setIfNotExists(key, value) {
|
|||
|
|
if (!this.has(key)) {
|
|||
|
|
this.set(key, value);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
setIfNumber(key, value) {
|
|||
|
|
if (typeof value === "number") {
|
|||
|
|
this.set(key, value);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
setIfArray(key, value) {
|
|||
|
|
if (Array.isArray(value) || ArrayBuffer.isView(value)) {
|
|||
|
|
this.set(key, value);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
setIfDefined(key, value) {
|
|||
|
|
if (value !== undefined && value !== null) {
|
|||
|
|
this.set(key, value);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
setIfName(key, value) {
|
|||
|
|
if (typeof value === "string") {
|
|||
|
|
this.set(key, Name.get(value));
|
|||
|
|
} else if (value instanceof Name) {
|
|||
|
|
this.set(key, value);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
has(key) {
|
|||
|
|
return this._map.has(key);
|
|||
|
|
}
|
|||
|
|
*[Symbol.iterator]() {
|
|||
|
|
for (const [key, value] of this._map) {
|
|||
|
|
yield [key, value instanceof primitives_Ref && this.xref ? this.xref.fetch(value, this.suppressEncryption) : value];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
static get empty() {
|
|||
|
|
const emptyDict = new primitives_Dict(null);
|
|||
|
|
emptyDict.set = (key, value) => {
|
|||
|
|
unreachable("Should not call `set` on the empty dictionary.");
|
|||
|
|
};
|
|||
|
|
return shadow(this, "empty", emptyDict);
|
|||
|
|
}
|
|||
|
|
static merge({
|
|||
|
|
xref,
|
|||
|
|
dictArray,
|
|||
|
|
mergeSubDicts = false
|
|||
|
|
}) {
|
|||
|
|
const mergedDict = new primitives_Dict(xref),
|
|||
|
|
properties = new Map();
|
|||
|
|
for (const dict of dictArray) {
|
|||
|
|
if (!(dict instanceof primitives_Dict)) {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
for (const [key, value] of dict._map) {
|
|||
|
|
let property = properties.get(key);
|
|||
|
|
if (property === undefined) {
|
|||
|
|
property = [];
|
|||
|
|
properties.set(key, property);
|
|||
|
|
} else if (!mergeSubDicts || !(value instanceof primitives_Dict)) {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
property.push(value);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
for (const [name, values] of properties) {
|
|||
|
|
if (values.length === 1 || !(values[0] instanceof primitives_Dict)) {
|
|||
|
|
mergedDict._map.set(name, values[0]);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
const subDict = new primitives_Dict(xref);
|
|||
|
|
for (const dict of values) {
|
|||
|
|
for (const [key, value] of dict._map) {
|
|||
|
|
if (!subDict._map.has(key)) {
|
|||
|
|
subDict._map.set(key, value);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (subDict.size > 0) {
|
|||
|
|
mergedDict._map.set(name, subDict);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
properties.clear();
|
|||
|
|
return mergedDict.size > 0 ? mergedDict : primitives_Dict.empty;
|
|||
|
|
}
|
|||
|
|
clone() {
|
|||
|
|
const dict = new primitives_Dict(this.xref);
|
|||
|
|
for (const key of this.getKeys()) {
|
|||
|
|
dict.set(key, this.getRaw(key));
|
|||
|
|
}
|
|||
|
|
return dict;
|
|||
|
|
}
|
|||
|
|
delete(key) {
|
|||
|
|
delete this._map[key];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class primitives_Ref {
|
|||
|
|
constructor(num, gen) {
|
|||
|
|
this.num = num;
|
|||
|
|
this.gen = gen;
|
|||
|
|
}
|
|||
|
|
toString() {
|
|||
|
|
if (this.gen === 0) {
|
|||
|
|
return `${this.num}R`;
|
|||
|
|
}
|
|||
|
|
return `${this.num}R${this.gen}`;
|
|||
|
|
}
|
|||
|
|
static fromString(str) {
|
|||
|
|
const ref = RefCache[str];
|
|||
|
|
if (ref) {
|
|||
|
|
return ref;
|
|||
|
|
}
|
|||
|
|
const m = /^(\d+)R(\d*)$/.exec(str);
|
|||
|
|
if (!m || m[1] === "0") {
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
return RefCache[str] = new primitives_Ref(parseInt(m[1]), !m[2] ? 0 : parseInt(m[2]));
|
|||
|
|
}
|
|||
|
|
static get(num, gen) {
|
|||
|
|
const key = gen === 0 ? `${num}R` : `${num}R${gen}`;
|
|||
|
|
return RefCache[key] ||= new primitives_Ref(num, gen);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class primitives_RefSet {
|
|||
|
|
constructor(parent = null) {
|
|||
|
|
this._set = new Set(parent?._set);
|
|||
|
|
}
|
|||
|
|
has(ref) {
|
|||
|
|
return this._set.has(ref.toString());
|
|||
|
|
}
|
|||
|
|
put(ref) {
|
|||
|
|
this._set.add(ref.toString());
|
|||
|
|
}
|
|||
|
|
remove(ref) {
|
|||
|
|
this._set.delete(ref.toString());
|
|||
|
|
}
|
|||
|
|
[Symbol.iterator]() {
|
|||
|
|
return this._set.values();
|
|||
|
|
}
|
|||
|
|
clear() {
|
|||
|
|
this._set.clear();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class RefSetCache {
|
|||
|
|
constructor() {
|
|||
|
|
this._map = new Map();
|
|||
|
|
}
|
|||
|
|
get size() {
|
|||
|
|
return this._map.size;
|
|||
|
|
}
|
|||
|
|
get(ref) {
|
|||
|
|
return this._map.get(ref.toString());
|
|||
|
|
}
|
|||
|
|
has(ref) {
|
|||
|
|
return this._map.has(ref.toString());
|
|||
|
|
}
|
|||
|
|
put(ref, obj) {
|
|||
|
|
this._map.set(ref.toString(), obj);
|
|||
|
|
}
|
|||
|
|
putAlias(ref, aliasRef) {
|
|||
|
|
this._map.set(ref.toString(), this.get(aliasRef));
|
|||
|
|
}
|
|||
|
|
[Symbol.iterator]() {
|
|||
|
|
return this._map.values();
|
|||
|
|
}
|
|||
|
|
clear() {
|
|||
|
|
this._map.clear();
|
|||
|
|
}
|
|||
|
|
*values() {
|
|||
|
|
yield* this._map.values();
|
|||
|
|
}
|
|||
|
|
*items() {
|
|||
|
|
for (const [ref, value] of this._map) {
|
|||
|
|
yield [primitives_Ref.fromString(ref), value];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function primitives_isName(v, name) {
|
|||
|
|
return v instanceof Name && (name === undefined || v.name === name);
|
|||
|
|
}
|
|||
|
|
function isCmd(v, cmd) {
|
|||
|
|
return v instanceof Cmd && (cmd === undefined || v.cmd === cmd);
|
|||
|
|
}
|
|||
|
|
function isDict(v, type) {
|
|||
|
|
return v instanceof primitives_Dict && (type === undefined || primitives_isName(v.get("Type"), type));
|
|||
|
|
}
|
|||
|
|
function isRefsEqual(v1, v2) {
|
|||
|
|
return v1.num === v2.num && v1.gen === v2.gen;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./src/core/base_stream.js
|
|||
|
|
|
|||
|
|
class base_stream_BaseStream {
|
|||
|
|
get length() {
|
|||
|
|
unreachable("Abstract getter `length` accessed");
|
|||
|
|
}
|
|||
|
|
get isEmpty() {
|
|||
|
|
unreachable("Abstract getter `isEmpty` accessed");
|
|||
|
|
}
|
|||
|
|
get isDataLoaded() {
|
|||
|
|
return shadow(this, "isDataLoaded", true);
|
|||
|
|
}
|
|||
|
|
getByte() {
|
|||
|
|
unreachable("Abstract method `getByte` called");
|
|||
|
|
}
|
|||
|
|
getBytes(length) {
|
|||
|
|
unreachable("Abstract method `getBytes` called");
|
|||
|
|
}
|
|||
|
|
async getImageData(length, decoderOptions) {
|
|||
|
|
return this.getBytes(length, decoderOptions);
|
|||
|
|
}
|
|||
|
|
async asyncGetBytes() {
|
|||
|
|
unreachable("Abstract method `asyncGetBytes` called");
|
|||
|
|
}
|
|||
|
|
get isAsync() {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
get isAsyncDecoder() {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
get canAsyncDecodeImageFromBuffer() {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
async getTransferableImage() {
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
peekByte() {
|
|||
|
|
const peekedByte = this.getByte();
|
|||
|
|
if (peekedByte !== -1) {
|
|||
|
|
this.pos--;
|
|||
|
|
}
|
|||
|
|
return peekedByte;
|
|||
|
|
}
|
|||
|
|
peekBytes(length) {
|
|||
|
|
const bytes = this.getBytes(length);
|
|||
|
|
this.pos -= bytes.length;
|
|||
|
|
return bytes;
|
|||
|
|
}
|
|||
|
|
getUint16() {
|
|||
|
|
const b0 = this.getByte();
|
|||
|
|
const b1 = this.getByte();
|
|||
|
|
if (b0 === -1 || b1 === -1) {
|
|||
|
|
return -1;
|
|||
|
|
}
|
|||
|
|
return (b0 << 8) + b1;
|
|||
|
|
}
|
|||
|
|
getInt32() {
|
|||
|
|
const b0 = this.getByte();
|
|||
|
|
const b1 = this.getByte();
|
|||
|
|
const b2 = this.getByte();
|
|||
|
|
const b3 = this.getByte();
|
|||
|
|
return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3;
|
|||
|
|
}
|
|||
|
|
getByteRange(begin, end) {
|
|||
|
|
unreachable("Abstract method `getByteRange` called");
|
|||
|
|
}
|
|||
|
|
getString(length) {
|
|||
|
|
return bytesToString(this.getBytes(length));
|
|||
|
|
}
|
|||
|
|
skip(n) {
|
|||
|
|
this.pos += n || 1;
|
|||
|
|
}
|
|||
|
|
reset() {
|
|||
|
|
unreachable("Abstract method `reset` called");
|
|||
|
|
}
|
|||
|
|
moveStart() {
|
|||
|
|
unreachable("Abstract method `moveStart` called");
|
|||
|
|
}
|
|||
|
|
makeSubStream(start, length, dict = null) {
|
|||
|
|
unreachable("Abstract method `makeSubStream` called");
|
|||
|
|
}
|
|||
|
|
getBaseStreams() {
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./src/core/core_utils.js
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
const PDF_VERSION_REGEXP = /^[1-9]\.\d$/;
|
|||
|
|
const MAX_INT_32 = 2 ** 31 - 1;
|
|||
|
|
const MIN_INT_32 = -(2 ** 31);
|
|||
|
|
const IDENTITY_MATRIX = (/* unused pure expression or super */ null && ([1, 0, 0, 1, 0, 0]));
|
|||
|
|
const RESOURCES_KEYS_OPERATOR_LIST = (/* unused pure expression or super */ null && (["ColorSpace", "ExtGState", "Font", "Pattern", "Properties", "Shading", "XObject"]));
|
|||
|
|
const RESOURCES_KEYS_TEXT_CONTENT = (/* unused pure expression or super */ null && (["ExtGState", "Font", "Properties", "XObject"]));
|
|||
|
|
function getLookupTableFactory(initializer) {
|
|||
|
|
let lookup;
|
|||
|
|
return function () {
|
|||
|
|
if (initializer) {
|
|||
|
|
lookup = Object.create(null);
|
|||
|
|
initializer(lookup);
|
|||
|
|
initializer = null;
|
|||
|
|
}
|
|||
|
|
return lookup;
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
class MissingDataException extends BaseException {
|
|||
|
|
constructor(begin, end) {
|
|||
|
|
super(`Missing data [${begin}, ${end})`, "MissingDataException");
|
|||
|
|
this.begin = begin;
|
|||
|
|
this.end = end;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class ParserEOFException extends BaseException {
|
|||
|
|
constructor(msg) {
|
|||
|
|
super(msg, "ParserEOFException");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class XRefEntryException extends BaseException {
|
|||
|
|
constructor(msg) {
|
|||
|
|
super(msg, "XRefEntryException");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class XRefParseException extends BaseException {
|
|||
|
|
constructor(msg) {
|
|||
|
|
super(msg, "XRefParseException");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function arrayBuffersToBytes(arr) {
|
|||
|
|
const length = arr.length;
|
|||
|
|
if (length === 0) {
|
|||
|
|
return new Uint8Array(0);
|
|||
|
|
}
|
|||
|
|
if (length === 1) {
|
|||
|
|
return new Uint8Array(arr[0]);
|
|||
|
|
}
|
|||
|
|
let dataLength = 0;
|
|||
|
|
for (let i = 0; i < length; i++) {
|
|||
|
|
dataLength += arr[i].byteLength;
|
|||
|
|
}
|
|||
|
|
const data = new Uint8Array(dataLength);
|
|||
|
|
let pos = 0;
|
|||
|
|
for (let i = 0; i < length; i++) {
|
|||
|
|
const item = new Uint8Array(arr[i]);
|
|||
|
|
data.set(item, pos);
|
|||
|
|
pos += item.byteLength;
|
|||
|
|
}
|
|||
|
|
return data;
|
|||
|
|
}
|
|||
|
|
async function fetchBinaryData(url) {
|
|||
|
|
const response = await fetch(url);
|
|||
|
|
if (!response.ok) {
|
|||
|
|
throw new Error(`Failed to fetch file "${url}" with "${response.statusText}".`);
|
|||
|
|
}
|
|||
|
|
return new Uint8Array(await response.arrayBuffer());
|
|||
|
|
}
|
|||
|
|
function getInheritableProperty({
|
|||
|
|
dict,
|
|||
|
|
key,
|
|||
|
|
getArray = false,
|
|||
|
|
stopWhenFound = true
|
|||
|
|
}) {
|
|||
|
|
let values;
|
|||
|
|
const visited = new RefSet();
|
|||
|
|
while (dict instanceof Dict && !(dict.objId && visited.has(dict.objId))) {
|
|||
|
|
if (dict.objId) {
|
|||
|
|
visited.put(dict.objId);
|
|||
|
|
}
|
|||
|
|
const value = getArray ? dict.getArray(key) : dict.get(key);
|
|||
|
|
if (value !== undefined) {
|
|||
|
|
if (stopWhenFound) {
|
|||
|
|
return value;
|
|||
|
|
}
|
|||
|
|
(values ||= []).push(value);
|
|||
|
|
}
|
|||
|
|
dict = dict.get("Parent");
|
|||
|
|
}
|
|||
|
|
return values;
|
|||
|
|
}
|
|||
|
|
function getParentToUpdate(dict, ref, xref) {
|
|||
|
|
const visited = new RefSet();
|
|||
|
|
const firstDict = dict;
|
|||
|
|
const result = {
|
|||
|
|
dict: null,
|
|||
|
|
ref: null
|
|||
|
|
};
|
|||
|
|
while (dict instanceof Dict && !visited.has(ref)) {
|
|||
|
|
visited.put(ref);
|
|||
|
|
if (dict.has("T")) {
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
ref = dict.getRaw("Parent");
|
|||
|
|
if (!(ref instanceof Ref)) {
|
|||
|
|
return result;
|
|||
|
|
}
|
|||
|
|
dict = xref.fetch(ref);
|
|||
|
|
}
|
|||
|
|
if (dict instanceof Dict && dict !== firstDict) {
|
|||
|
|
result.dict = dict;
|
|||
|
|
result.ref = ref;
|
|||
|
|
}
|
|||
|
|
return result;
|
|||
|
|
}
|
|||
|
|
const ROMAN_NUMBER_MAP = (/* unused pure expression or super */ null && (["", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM", "", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC", "", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"]));
|
|||
|
|
function toRomanNumerals(number, lowerCase = false) {
|
|||
|
|
assert(Number.isInteger(number) && number > 0, "The number should be a positive integer.");
|
|||
|
|
const roman = "M".repeat(number / 1000 | 0) + ROMAN_NUMBER_MAP[number % 1000 / 100 | 0] + ROMAN_NUMBER_MAP[10 + (number % 100 / 10 | 0)] + ROMAN_NUMBER_MAP[20 + number % 10];
|
|||
|
|
return lowerCase ? roman.toLowerCase() : roman;
|
|||
|
|
}
|
|||
|
|
function log2(x) {
|
|||
|
|
return x > 0 ? Math.ceil(Math.log2(x)) : 0;
|
|||
|
|
}
|
|||
|
|
function readInt8(data, offset) {
|
|||
|
|
return data[offset] << 24 >> 24;
|
|||
|
|
}
|
|||
|
|
function readInt16(data, offset) {
|
|||
|
|
return (data[offset] << 24 | data[offset + 1] << 16) >> 16;
|
|||
|
|
}
|
|||
|
|
function readUint16(data, offset) {
|
|||
|
|
return data[offset] << 8 | data[offset + 1];
|
|||
|
|
}
|
|||
|
|
function readUint32(data, offset) {
|
|||
|
|
return (data[offset] << 24 | data[offset + 1] << 16 | data[offset + 2] << 8 | data[offset + 3]) >>> 0;
|
|||
|
|
}
|
|||
|
|
function isWhiteSpace(ch) {
|
|||
|
|
return ch === 0x20 || ch === 0x09 || ch === 0x0d || ch === 0x0a;
|
|||
|
|
}
|
|||
|
|
function isBooleanArray(arr, len) {
|
|||
|
|
return Array.isArray(arr) && (len === null || arr.length === len) && arr.every(x => typeof x === "boolean");
|
|||
|
|
}
|
|||
|
|
function isNumberArray(arr, len) {
|
|||
|
|
if (Array.isArray(arr)) {
|
|||
|
|
return (len === null || arr.length === len) && arr.every(x => typeof x === "number");
|
|||
|
|
}
|
|||
|
|
return ArrayBuffer.isView(arr) && !(arr instanceof BigInt64Array || arr instanceof BigUint64Array) && (len === null || arr.length === len);
|
|||
|
|
}
|
|||
|
|
function lookupMatrix(arr, fallback) {
|
|||
|
|
return isNumberArray(arr, 6) ? arr : fallback;
|
|||
|
|
}
|
|||
|
|
function lookupRect(arr, fallback) {
|
|||
|
|
return isNumberArray(arr, 4) ? arr : fallback;
|
|||
|
|
}
|
|||
|
|
function lookupNormalRect(arr, fallback) {
|
|||
|
|
return isNumberArray(arr, 4) ? Util.normalizeRect(arr) : fallback;
|
|||
|
|
}
|
|||
|
|
function parseXFAPath(path) {
|
|||
|
|
const positionPattern = /(.+)\[(\d+)\]$/;
|
|||
|
|
return path.split(".").map(component => {
|
|||
|
|
const m = component.match(positionPattern);
|
|||
|
|
if (m) {
|
|||
|
|
return {
|
|||
|
|
name: m[1],
|
|||
|
|
pos: parseInt(m[2], 10)
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
return {
|
|||
|
|
name: component,
|
|||
|
|
pos: 0
|
|||
|
|
};
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
function escapePDFName(str) {
|
|||
|
|
const buffer = [];
|
|||
|
|
let start = 0;
|
|||
|
|
for (let i = 0, ii = str.length; i < ii; i++) {
|
|||
|
|
const char = str.charCodeAt(i);
|
|||
|
|
if (char < 0x21 || char > 0x7e || char === 0x23 || char === 0x28 || char === 0x29 || char === 0x3c || char === 0x3e || char === 0x5b || char === 0x5d || char === 0x7b || char === 0x7d || char === 0x2f || char === 0x25) {
|
|||
|
|
if (start < i) {
|
|||
|
|
buffer.push(str.substring(start, i));
|
|||
|
|
}
|
|||
|
|
buffer.push(`#${char.toString(16)}`);
|
|||
|
|
start = i + 1;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (buffer.length === 0) {
|
|||
|
|
return str;
|
|||
|
|
}
|
|||
|
|
if (start < str.length) {
|
|||
|
|
buffer.push(str.substring(start, str.length));
|
|||
|
|
}
|
|||
|
|
return buffer.join("");
|
|||
|
|
}
|
|||
|
|
function escapeString(str) {
|
|||
|
|
return str.replaceAll(/([()\\\n\r])/g, match => {
|
|||
|
|
if (match === "\n") {
|
|||
|
|
return "\\n";
|
|||
|
|
} else if (match === "\r") {
|
|||
|
|
return "\\r";
|
|||
|
|
}
|
|||
|
|
return `\\${match}`;
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
function _collectJS(entry, xref, list, parents) {
|
|||
|
|
if (!entry) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
let parent = null;
|
|||
|
|
if (entry instanceof Ref) {
|
|||
|
|
if (parents.has(entry)) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
parent = entry;
|
|||
|
|
parents.put(parent);
|
|||
|
|
entry = xref.fetch(entry);
|
|||
|
|
}
|
|||
|
|
if (Array.isArray(entry)) {
|
|||
|
|
for (const element of entry) {
|
|||
|
|
_collectJS(element, xref, list, parents);
|
|||
|
|
}
|
|||
|
|
} else if (entry instanceof Dict) {
|
|||
|
|
if (isName(entry.get("S"), "JavaScript")) {
|
|||
|
|
const js = entry.get("JS");
|
|||
|
|
let code;
|
|||
|
|
if (js instanceof BaseStream) {
|
|||
|
|
code = js.getString();
|
|||
|
|
} else if (typeof js === "string") {
|
|||
|
|
code = js;
|
|||
|
|
}
|
|||
|
|
code &&= stringToPDFString(code, true).replaceAll("\x00", "");
|
|||
|
|
if (code) {
|
|||
|
|
list.push(code.trim());
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
_collectJS(entry.getRaw("Next"), xref, list, parents);
|
|||
|
|
}
|
|||
|
|
if (parent) {
|
|||
|
|
parents.remove(parent);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function collectActions(xref, dict, eventType) {
|
|||
|
|
const actions = Object.create(null);
|
|||
|
|
const additionalActionsDicts = getInheritableProperty({
|
|||
|
|
dict,
|
|||
|
|
key: "AA",
|
|||
|
|
stopWhenFound: false
|
|||
|
|
});
|
|||
|
|
if (additionalActionsDicts) {
|
|||
|
|
for (let i = additionalActionsDicts.length - 1; i >= 0; i--) {
|
|||
|
|
const additionalActions = additionalActionsDicts[i];
|
|||
|
|
if (!(additionalActions instanceof Dict)) {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
for (const key of additionalActions.getKeys()) {
|
|||
|
|
const action = eventType[key];
|
|||
|
|
if (!action) {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
const actionDict = additionalActions.getRaw(key);
|
|||
|
|
const parents = new RefSet();
|
|||
|
|
const list = [];
|
|||
|
|
_collectJS(actionDict, xref, list, parents);
|
|||
|
|
if (list.length > 0) {
|
|||
|
|
actions[action] = list;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (dict.has("A")) {
|
|||
|
|
const actionDict = dict.get("A");
|
|||
|
|
const parents = new RefSet();
|
|||
|
|
const list = [];
|
|||
|
|
_collectJS(actionDict, xref, list, parents);
|
|||
|
|
if (list.length > 0) {
|
|||
|
|
actions.Action = list;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return objectSize(actions) > 0 ? actions : null;
|
|||
|
|
}
|
|||
|
|
const XMLEntities = {
|
|||
|
|
0x3c: "<",
|
|||
|
|
0x3e: ">",
|
|||
|
|
0x26: "&",
|
|||
|
|
0x22: """,
|
|||
|
|
0x27: "'"
|
|||
|
|
};
|
|||
|
|
function* codePointIter(str) {
|
|||
|
|
for (let i = 0, ii = str.length; i < ii; i++) {
|
|||
|
|
const char = str.codePointAt(i);
|
|||
|
|
if (char > 0xd7ff && (char < 0xe000 || char > 0xfffd)) {
|
|||
|
|
i++;
|
|||
|
|
}
|
|||
|
|
yield char;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function encodeToXmlString(str) {
|
|||
|
|
const buffer = [];
|
|||
|
|
let start = 0;
|
|||
|
|
for (let i = 0, ii = str.length; i < ii; i++) {
|
|||
|
|
const char = str.codePointAt(i);
|
|||
|
|
if (0x20 <= char && char <= 0x7e) {
|
|||
|
|
const entity = XMLEntities[char];
|
|||
|
|
if (entity) {
|
|||
|
|
if (start < i) {
|
|||
|
|
buffer.push(str.substring(start, i));
|
|||
|
|
}
|
|||
|
|
buffer.push(entity);
|
|||
|
|
start = i + 1;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
if (start < i) {
|
|||
|
|
buffer.push(str.substring(start, i));
|
|||
|
|
}
|
|||
|
|
buffer.push(`&#x${char.toString(16).toUpperCase()};`);
|
|||
|
|
if (char > 0xd7ff && (char < 0xe000 || char > 0xfffd)) {
|
|||
|
|
i++;
|
|||
|
|
}
|
|||
|
|
start = i + 1;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (buffer.length === 0) {
|
|||
|
|
return str;
|
|||
|
|
}
|
|||
|
|
if (start < str.length) {
|
|||
|
|
buffer.push(str.substring(start, str.length));
|
|||
|
|
}
|
|||
|
|
return buffer.join("");
|
|||
|
|
}
|
|||
|
|
function validateFontName(fontFamily, mustWarn = false) {
|
|||
|
|
const m = /^("|').*("|')$/.exec(fontFamily);
|
|||
|
|
if (m && m[1] === m[2]) {
|
|||
|
|
const re = new RegExp(`[^\\\\]${m[1]}`);
|
|||
|
|
if (re.test(fontFamily.slice(1, -1))) {
|
|||
|
|
if (mustWarn) {
|
|||
|
|
warn(`FontFamily contains unescaped ${m[1]}: ${fontFamily}.`);
|
|||
|
|
}
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
for (const ident of fontFamily.split(/[ \t]+/)) {
|
|||
|
|
if (/^(\d|(-(\d|-)))/.test(ident) || !/^[\w-\\]+$/.test(ident)) {
|
|||
|
|
if (mustWarn) {
|
|||
|
|
warn(`FontFamily contains invalid <custom-ident>: ${fontFamily}.`);
|
|||
|
|
}
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
function validateCSSFont(cssFontInfo) {
|
|||
|
|
const DEFAULT_CSS_FONT_OBLIQUE = "14";
|
|||
|
|
const DEFAULT_CSS_FONT_WEIGHT = "400";
|
|||
|
|
const CSS_FONT_WEIGHT_VALUES = new Set(["100", "200", "300", "400", "500", "600", "700", "800", "900", "1000", "normal", "bold", "bolder", "lighter"]);
|
|||
|
|
const {
|
|||
|
|
fontFamily,
|
|||
|
|
fontWeight,
|
|||
|
|
italicAngle
|
|||
|
|
} = cssFontInfo;
|
|||
|
|
if (!validateFontName(fontFamily, true)) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
const weight = fontWeight ? fontWeight.toString() : "";
|
|||
|
|
cssFontInfo.fontWeight = CSS_FONT_WEIGHT_VALUES.has(weight) ? weight : DEFAULT_CSS_FONT_WEIGHT;
|
|||
|
|
const angle = parseFloat(italicAngle);
|
|||
|
|
cssFontInfo.italicAngle = isNaN(angle) || angle < -90 || angle > 90 ? DEFAULT_CSS_FONT_OBLIQUE : italicAngle.toString();
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
function recoverJsURL(str) {
|
|||
|
|
const URL_OPEN_METHODS = ["app.launchURL", "window.open", "xfa.host.gotoURL"];
|
|||
|
|
const regex = new RegExp("^\\s*(" + URL_OPEN_METHODS.join("|").replaceAll(".", "\\.") + ")\\((?:'|\")([^'\"]*)(?:'|\")(?:,\\s*(\\w+)\\)|\\))", "i");
|
|||
|
|
const jsUrl = regex.exec(str);
|
|||
|
|
if (jsUrl?.[2]) {
|
|||
|
|
return {
|
|||
|
|
url: jsUrl[2],
|
|||
|
|
newWindow: jsUrl[1] === "app.launchURL" && jsUrl[3] === "true"
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
function numberToString(value) {
|
|||
|
|
if (Number.isInteger(value)) {
|
|||
|
|
return value.toString();
|
|||
|
|
}
|
|||
|
|
const roundedValue = Math.round(value * 100);
|
|||
|
|
if (roundedValue % 100 === 0) {
|
|||
|
|
return (roundedValue / 100).toString();
|
|||
|
|
}
|
|||
|
|
if (roundedValue % 10 === 0) {
|
|||
|
|
return value.toFixed(1);
|
|||
|
|
}
|
|||
|
|
return value.toFixed(2);
|
|||
|
|
}
|
|||
|
|
function getNewAnnotationsMap(annotationStorage) {
|
|||
|
|
if (!annotationStorage) {
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
const newAnnotationsByPage = new Map();
|
|||
|
|
for (const [key, value] of annotationStorage) {
|
|||
|
|
if (!key.startsWith(AnnotationEditorPrefix)) {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
let annotations = newAnnotationsByPage.get(value.pageIndex);
|
|||
|
|
if (!annotations) {
|
|||
|
|
annotations = [];
|
|||
|
|
newAnnotationsByPage.set(value.pageIndex, annotations);
|
|||
|
|
}
|
|||
|
|
annotations.push(value);
|
|||
|
|
}
|
|||
|
|
return newAnnotationsByPage.size > 0 ? newAnnotationsByPage : null;
|
|||
|
|
}
|
|||
|
|
function stringToAsciiOrUTF16BE(str) {
|
|||
|
|
if (str === null || str === undefined) {
|
|||
|
|
return str;
|
|||
|
|
}
|
|||
|
|
return isAscii(str) ? str : stringToUTF16String(str, true);
|
|||
|
|
}
|
|||
|
|
function isAscii(str) {
|
|||
|
|
if (typeof str !== "string") {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
return !str || /^[\x00-\x7F]*$/.test(str);
|
|||
|
|
}
|
|||
|
|
function stringToUTF16HexString(str) {
|
|||
|
|
const buf = [];
|
|||
|
|
for (let i = 0, ii = str.length; i < ii; i++) {
|
|||
|
|
const char = str.charCodeAt(i);
|
|||
|
|
buf.push(hexNumbers[char >> 8 & 0xff], hexNumbers[char & 0xff]);
|
|||
|
|
}
|
|||
|
|
return buf.join("");
|
|||
|
|
}
|
|||
|
|
function stringToUTF16String(str, bigEndian = false) {
|
|||
|
|
const buf = [];
|
|||
|
|
if (bigEndian) {
|
|||
|
|
buf.push("\xFE\xFF");
|
|||
|
|
}
|
|||
|
|
for (let i = 0, ii = str.length; i < ii; i++) {
|
|||
|
|
const char = str.charCodeAt(i);
|
|||
|
|
buf.push(String.fromCharCode(char >> 8 & 0xff), String.fromCharCode(char & 0xff));
|
|||
|
|
}
|
|||
|
|
return buf.join("");
|
|||
|
|
}
|
|||
|
|
function getRotationMatrix(rotation, width, height) {
|
|||
|
|
switch (rotation) {
|
|||
|
|
case 90:
|
|||
|
|
return [0, 1, -1, 0, width, 0];
|
|||
|
|
case 180:
|
|||
|
|
return [-1, 0, 0, -1, width, height];
|
|||
|
|
case 270:
|
|||
|
|
return [0, -1, 1, 0, 0, height];
|
|||
|
|
default:
|
|||
|
|
throw new Error("Invalid rotation");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function getSizeInBytes(x) {
|
|||
|
|
return Math.ceil(Math.ceil(Math.log2(1 + x)) / 8);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./src/core/arithmetic_decoder.js
|
|||
|
|
const QeTable = [{
|
|||
|
|
qe: 0x5601,
|
|||
|
|
nmps: 1,
|
|||
|
|
nlps: 1,
|
|||
|
|
switchFlag: 1
|
|||
|
|
}, {
|
|||
|
|
qe: 0x3401,
|
|||
|
|
nmps: 2,
|
|||
|
|
nlps: 6,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x1801,
|
|||
|
|
nmps: 3,
|
|||
|
|
nlps: 9,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0ac1,
|
|||
|
|
nmps: 4,
|
|||
|
|
nlps: 12,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0521,
|
|||
|
|
nmps: 5,
|
|||
|
|
nlps: 29,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0221,
|
|||
|
|
nmps: 38,
|
|||
|
|
nlps: 33,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x5601,
|
|||
|
|
nmps: 7,
|
|||
|
|
nlps: 6,
|
|||
|
|
switchFlag: 1
|
|||
|
|
}, {
|
|||
|
|
qe: 0x5401,
|
|||
|
|
nmps: 8,
|
|||
|
|
nlps: 14,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x4801,
|
|||
|
|
nmps: 9,
|
|||
|
|
nlps: 14,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x3801,
|
|||
|
|
nmps: 10,
|
|||
|
|
nlps: 14,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x3001,
|
|||
|
|
nmps: 11,
|
|||
|
|
nlps: 17,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x2401,
|
|||
|
|
nmps: 12,
|
|||
|
|
nlps: 18,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x1c01,
|
|||
|
|
nmps: 13,
|
|||
|
|
nlps: 20,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x1601,
|
|||
|
|
nmps: 29,
|
|||
|
|
nlps: 21,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x5601,
|
|||
|
|
nmps: 15,
|
|||
|
|
nlps: 14,
|
|||
|
|
switchFlag: 1
|
|||
|
|
}, {
|
|||
|
|
qe: 0x5401,
|
|||
|
|
nmps: 16,
|
|||
|
|
nlps: 14,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x5101,
|
|||
|
|
nmps: 17,
|
|||
|
|
nlps: 15,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x4801,
|
|||
|
|
nmps: 18,
|
|||
|
|
nlps: 16,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x3801,
|
|||
|
|
nmps: 19,
|
|||
|
|
nlps: 17,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x3401,
|
|||
|
|
nmps: 20,
|
|||
|
|
nlps: 18,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x3001,
|
|||
|
|
nmps: 21,
|
|||
|
|
nlps: 19,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x2801,
|
|||
|
|
nmps: 22,
|
|||
|
|
nlps: 19,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x2401,
|
|||
|
|
nmps: 23,
|
|||
|
|
nlps: 20,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x2201,
|
|||
|
|
nmps: 24,
|
|||
|
|
nlps: 21,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x1c01,
|
|||
|
|
nmps: 25,
|
|||
|
|
nlps: 22,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x1801,
|
|||
|
|
nmps: 26,
|
|||
|
|
nlps: 23,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x1601,
|
|||
|
|
nmps: 27,
|
|||
|
|
nlps: 24,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x1401,
|
|||
|
|
nmps: 28,
|
|||
|
|
nlps: 25,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x1201,
|
|||
|
|
nmps: 29,
|
|||
|
|
nlps: 26,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x1101,
|
|||
|
|
nmps: 30,
|
|||
|
|
nlps: 27,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0ac1,
|
|||
|
|
nmps: 31,
|
|||
|
|
nlps: 28,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x09c1,
|
|||
|
|
nmps: 32,
|
|||
|
|
nlps: 29,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x08a1,
|
|||
|
|
nmps: 33,
|
|||
|
|
nlps: 30,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0521,
|
|||
|
|
nmps: 34,
|
|||
|
|
nlps: 31,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0441,
|
|||
|
|
nmps: 35,
|
|||
|
|
nlps: 32,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x02a1,
|
|||
|
|
nmps: 36,
|
|||
|
|
nlps: 33,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0221,
|
|||
|
|
nmps: 37,
|
|||
|
|
nlps: 34,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0141,
|
|||
|
|
nmps: 38,
|
|||
|
|
nlps: 35,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0111,
|
|||
|
|
nmps: 39,
|
|||
|
|
nlps: 36,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0085,
|
|||
|
|
nmps: 40,
|
|||
|
|
nlps: 37,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0049,
|
|||
|
|
nmps: 41,
|
|||
|
|
nlps: 38,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0025,
|
|||
|
|
nmps: 42,
|
|||
|
|
nlps: 39,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0015,
|
|||
|
|
nmps: 43,
|
|||
|
|
nlps: 40,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0009,
|
|||
|
|
nmps: 44,
|
|||
|
|
nlps: 41,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0005,
|
|||
|
|
nmps: 45,
|
|||
|
|
nlps: 42,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x0001,
|
|||
|
|
nmps: 45,
|
|||
|
|
nlps: 43,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}, {
|
|||
|
|
qe: 0x5601,
|
|||
|
|
nmps: 46,
|
|||
|
|
nlps: 46,
|
|||
|
|
switchFlag: 0
|
|||
|
|
}];
|
|||
|
|
class ArithmeticDecoder {
|
|||
|
|
constructor(data, start, end) {
|
|||
|
|
this.data = data;
|
|||
|
|
this.bp = start;
|
|||
|
|
this.dataEnd = end;
|
|||
|
|
this.chigh = data[start];
|
|||
|
|
this.clow = 0;
|
|||
|
|
this.byteIn();
|
|||
|
|
this.chigh = this.chigh << 7 & 0xffff | this.clow >> 9 & 0x7f;
|
|||
|
|
this.clow = this.clow << 7 & 0xffff;
|
|||
|
|
this.ct -= 7;
|
|||
|
|
this.a = 0x8000;
|
|||
|
|
}
|
|||
|
|
byteIn() {
|
|||
|
|
const data = this.data;
|
|||
|
|
let bp = this.bp;
|
|||
|
|
if (data[bp] === 0xff) {
|
|||
|
|
if (data[bp + 1] > 0x8f) {
|
|||
|
|
this.clow += 0xff00;
|
|||
|
|
this.ct = 8;
|
|||
|
|
} else {
|
|||
|
|
bp++;
|
|||
|
|
this.clow += data[bp] << 9;
|
|||
|
|
this.ct = 7;
|
|||
|
|
this.bp = bp;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
bp++;
|
|||
|
|
this.clow += bp < this.dataEnd ? data[bp] << 8 : 0xff00;
|
|||
|
|
this.ct = 8;
|
|||
|
|
this.bp = bp;
|
|||
|
|
}
|
|||
|
|
if (this.clow > 0xffff) {
|
|||
|
|
this.chigh += this.clow >> 16;
|
|||
|
|
this.clow &= 0xffff;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
readBit(contexts, pos) {
|
|||
|
|
let cx_index = contexts[pos] >> 1,
|
|||
|
|
cx_mps = contexts[pos] & 1;
|
|||
|
|
const qeTableIcx = QeTable[cx_index];
|
|||
|
|
const qeIcx = qeTableIcx.qe;
|
|||
|
|
let d;
|
|||
|
|
let a = this.a - qeIcx;
|
|||
|
|
if (this.chigh < qeIcx) {
|
|||
|
|
if (a < qeIcx) {
|
|||
|
|
a = qeIcx;
|
|||
|
|
d = cx_mps;
|
|||
|
|
cx_index = qeTableIcx.nmps;
|
|||
|
|
} else {
|
|||
|
|
a = qeIcx;
|
|||
|
|
d = 1 ^ cx_mps;
|
|||
|
|
if (qeTableIcx.switchFlag === 1) {
|
|||
|
|
cx_mps = d;
|
|||
|
|
}
|
|||
|
|
cx_index = qeTableIcx.nlps;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
this.chigh -= qeIcx;
|
|||
|
|
if ((a & 0x8000) !== 0) {
|
|||
|
|
this.a = a;
|
|||
|
|
return cx_mps;
|
|||
|
|
}
|
|||
|
|
if (a < qeIcx) {
|
|||
|
|
d = 1 ^ cx_mps;
|
|||
|
|
if (qeTableIcx.switchFlag === 1) {
|
|||
|
|
cx_mps = d;
|
|||
|
|
}
|
|||
|
|
cx_index = qeTableIcx.nlps;
|
|||
|
|
} else {
|
|||
|
|
d = cx_mps;
|
|||
|
|
cx_index = qeTableIcx.nmps;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
do {
|
|||
|
|
if (this.ct === 0) {
|
|||
|
|
this.byteIn();
|
|||
|
|
}
|
|||
|
|
a <<= 1;
|
|||
|
|
this.chigh = this.chigh << 1 & 0xffff | this.clow >> 15 & 1;
|
|||
|
|
this.clow = this.clow << 1 & 0xffff;
|
|||
|
|
this.ct--;
|
|||
|
|
} while ((a & 0x8000) === 0);
|
|||
|
|
this.a = a;
|
|||
|
|
contexts[pos] = cx_index << 1 | cx_mps;
|
|||
|
|
return d;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./src/core/ccitt.js
|
|||
|
|
|
|||
|
|
const ccittEOL = -2;
|
|||
|
|
const ccittEOF = -1;
|
|||
|
|
const twoDimPass = 0;
|
|||
|
|
const twoDimHoriz = 1;
|
|||
|
|
const twoDimVert0 = 2;
|
|||
|
|
const twoDimVertR1 = 3;
|
|||
|
|
const twoDimVertL1 = 4;
|
|||
|
|
const twoDimVertR2 = 5;
|
|||
|
|
const twoDimVertL2 = 6;
|
|||
|
|
const twoDimVertR3 = 7;
|
|||
|
|
const twoDimVertL3 = 8;
|
|||
|
|
const twoDimTable = [[-1, -1], [-1, -1], [7, twoDimVertL3], [7, twoDimVertR3], [6, twoDimVertL2], [6, twoDimVertL2], [6, twoDimVertR2], [6, twoDimVertR2], [4, twoDimPass], [4, twoDimPass], [4, twoDimPass], [4, twoDimPass], [4, twoDimPass], [4, twoDimPass], [4, twoDimPass], [4, twoDimPass], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimHoriz], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertL1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [3, twoDimVertR1], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0], [1, twoDimVert0]];
|
|||
|
|
const whiteTable1 = [[-1, -1], [12, ccittEOL], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [11, 1792], [11, 1792], [12, 1984], [12, 2048], [12, 2112], [12, 2176], [12, 2240], [12, 2304], [11, 1856], [11, 1856], [11, 1920], [11, 1920], [12, 2368], [12, 2432], [12, 2496], [12, 2560]];
|
|||
|
|
const whiteTable2 = [[-1, -1], [-1, -1], [-1, -1], [-1, -1], [8, 29], [8, 29], [8, 30], [8, 30], [8, 45], [8, 45], [8, 46], [8, 46], [7, 22], [7, 22], [7, 22], [7, 22], [7, 23], [7, 23], [7, 23], [7, 23], [8, 47], [8, 47], [8, 48], [8, 48], [6, 13], [6, 13], [6, 13], [6, 13], [6, 13], [6, 13], [6, 13], [6, 13], [7, 20], [7, 20], [7, 20], [7, 20], [8, 33], [8, 33], [8, 34], [8, 34], [8, 35], [8, 35], [8, 36], [8, 36], [8, 37], [8, 37], [8, 38], [8, 38], [7, 19], [7, 19], [7, 19], [7, 19], [8, 31], [8, 31], [8, 32], [8, 32], [6, 1], [6, 1], [6, 1], [6, 1], [6, 1], [6, 1], [6, 1], [6, 1], [6, 12], [6, 12], [6, 12], [6, 12], [6, 12], [6, 12], [6, 12], [6, 12], [8, 53], [8, 53], [8, 54], [8, 54], [7, 26], [7, 26], [7, 26], [7, 26], [8, 39], [8, 39], [8, 40], [8, 40], [8, 41], [8, 41], [8, 42], [8, 42], [8, 43], [8, 43], [8, 44], [8, 44], [7, 21], [7, 21], [7, 21], [7, 21], [7, 28], [7, 28], [7, 28], [7, 28], [8, 61], [8, 61], [8, 62], [8, 62], [8, 63], [8, 63], [8, 0], [8, 0], [8, 320], [8, 320], [8, 384], [8, 384], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 10], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [5, 11], [7, 27], [7, 27], [7, 27], [7, 27], [8, 59], [8, 59], [8, 60], [8, 60], [9, 1472], [9, 1536], [9, 1600], [9, 1728], [7, 18], [7, 18], [7, 18], [7, 18], [7, 24], [7, 24], [7, 24], [7, 24], [8, 49], [8, 49], [8, 50], [8, 50], [8, 51], [8, 51], [8, 52], [8, 52], [7, 25], [7, 25], [7, 25], [7, 25], [8, 55], [8, 55], [8, 56], [8, 56], [8, 57], [8, 57], [8, 58], [8, 58], [6, 192], [6, 192], [6, 192], [6, 192], [6, 192], [6, 192], [6, 192], [6, 192], [6, 1664], [6, 1664], [6, 1664], [6, 1664], [6, 1664], [6, 1664], [6, 1664], [6, 1664], [8, 448], [8, 448], [8, 512], [8, 512], [9, 704], [9, 768], [8, 640], [8, 640], [8, 576], [8, 576], [9, 832], [9, 896], [9, 960], [9, 1024], [9, 1088], [9, 1152], [9, 1216], [9, 1280], [9, 1344], [9, 1408], [7, 256], [7, 256], [7, 256], [7, 256], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 2], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [4, 3], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 128], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 8], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [5, 9], [6, 16], [6, 16], [6, 16], [6, 16], [6, 16], [6, 16], [6, 16], [6, 16], [6, 17], [6, 17], [6, 17], [6, 17], [6, 17], [6, 17], [6, 17], [6, 17], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 4], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [4, 5], [6, 14], [6, 14], [6, 14], [6, 14], [6, 14], [6, 14], [6, 14], [6, 14], [6, 15], [6, 15], [6, 15], [6, 15], [6, 15], [6, 15], [6, 15], [6, 15], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [5, 64], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6
|
|||
|
|
const blackTable1 = [[-1, -1], [-1, -1], [12, ccittEOL], [12, ccittEOL], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [11, 1792], [11, 1792], [11, 1792], [11, 1792], [12, 1984], [12, 1984], [12, 2048], [12, 2048], [12, 2112], [12, 2112], [12, 2176], [12, 2176], [12, 2240], [12, 2240], [12, 2304], [12, 2304], [11, 1856], [11, 1856], [11, 1856], [11, 1856], [11, 1920], [11, 1920], [11, 1920], [11, 1920], [12, 2368], [12, 2368], [12, 2432], [12, 2432], [12, 2496], [12, 2496], [12, 2560], [12, 2560], [10, 18], [10, 18], [10, 18], [10, 18], [10, 18], [10, 18], [10, 18], [10, 18], [12, 52], [12, 52], [13, 640], [13, 704], [13, 768], [13, 832], [12, 55], [12, 55], [12, 56], [12, 56], [13, 1280], [13, 1344], [13, 1408], [13, 1472], [12, 59], [12, 59], [12, 60], [12, 60], [13, 1536], [13, 1600], [11, 24], [11, 24], [11, 24], [11, 24], [11, 25], [11, 25], [11, 25], [11, 25], [13, 1664], [13, 1728], [12, 320], [12, 320], [12, 384], [12, 384], [12, 448], [12, 448], [13, 512], [13, 576], [12, 53], [12, 53], [12, 54], [12, 54], [13, 896], [13, 960], [13, 1024], [13, 1088], [13, 1152], [13, 1216], [10, 64], [10, 64], [10, 64], [10, 64], [10, 64], [10, 64], [10, 64], [10, 64]];
|
|||
|
|
const blackTable2 = [[8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [11, 23], [11, 23], [12, 50], [12, 51], [12, 44], [12, 45], [12, 46], [12, 47], [12, 57], [12, 58], [12, 61], [12, 256], [10, 16], [10, 16], [10, 16], [10, 16], [10, 17], [10, 17], [10, 17], [10, 17], [12, 48], [12, 49], [12, 62], [12, 63], [12, 30], [12, 31], [12, 32], [12, 33], [12, 40], [12, 41], [11, 22], [11, 22], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [9, 15], [9, 15], [9, 15], [9, 15], [9, 15], [9, 15], [9, 15], [9, 15], [12, 128], [12, 192], [12, 26], [12, 27], [12, 28], [12, 29], [11, 19], [11, 19], [11, 20], [11, 20], [12, 34], [12, 35], [12, 36], [12, 37], [12, 38], [12, 39], [11, 21], [11, 21], [12, 42], [12, 43], [10, 0], [10, 0], [10, 0], [10, 0], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12]];
|
|||
|
|
const blackTable3 = [[-1, -1], [-1, -1], [-1, -1], [-1, -1], [6, 9], [6, 8], [5, 7], [5, 7], [4, 6], [4, 6], [4, 6], [4, 6], [4, 5], [4, 5], [4, 5], [4, 5], [3, 1], [3, 1], [3, 1], [3, 1], [3, 1], [3, 1], [3, 1], [3, 1], [3, 4], [3, 4], [3, 4], [3, 4], [3, 4], [3, 4], [3, 4], [3, 4], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2]];
|
|||
|
|
class CCITTFaxDecoder {
|
|||
|
|
constructor(source, options = {}) {
|
|||
|
|
if (typeof source?.next !== "function") {
|
|||
|
|
throw new Error('CCITTFaxDecoder - invalid "source" parameter.');
|
|||
|
|
}
|
|||
|
|
this.source = source;
|
|||
|
|
this.eof = false;
|
|||
|
|
this.encoding = options.K || 0;
|
|||
|
|
this.eoline = options.EndOfLine || false;
|
|||
|
|
this.byteAlign = options.EncodedByteAlign || false;
|
|||
|
|
this.columns = options.Columns || 1728;
|
|||
|
|
this.rows = options.Rows || 0;
|
|||
|
|
this.eoblock = options.EndOfBlock ?? true;
|
|||
|
|
this.black = options.BlackIs1 || false;
|
|||
|
|
this.codingLine = new Uint32Array(this.columns + 1);
|
|||
|
|
this.refLine = new Uint32Array(this.columns + 2);
|
|||
|
|
this.codingLine[0] = this.columns;
|
|||
|
|
this.codingPos = 0;
|
|||
|
|
this.row = 0;
|
|||
|
|
this.nextLine2D = this.encoding < 0;
|
|||
|
|
this.inputBits = 0;
|
|||
|
|
this.inputBuf = 0;
|
|||
|
|
this.outputBits = 0;
|
|||
|
|
this.rowsDone = false;
|
|||
|
|
let code1;
|
|||
|
|
while ((code1 = this._lookBits(12)) === 0) {
|
|||
|
|
this._eatBits(1);
|
|||
|
|
}
|
|||
|
|
if (code1 === 1) {
|
|||
|
|
this._eatBits(12);
|
|||
|
|
}
|
|||
|
|
if (this.encoding > 0) {
|
|||
|
|
this.nextLine2D = !this._lookBits(1);
|
|||
|
|
this._eatBits(1);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
readNextChar() {
|
|||
|
|
if (this.eof) {
|
|||
|
|
return -1;
|
|||
|
|
}
|
|||
|
|
const refLine = this.refLine;
|
|||
|
|
const codingLine = this.codingLine;
|
|||
|
|
const columns = this.columns;
|
|||
|
|
let refPos, blackPixels, bits, i;
|
|||
|
|
if (this.outputBits === 0) {
|
|||
|
|
if (this.rowsDone) {
|
|||
|
|
this.eof = true;
|
|||
|
|
}
|
|||
|
|
if (this.eof) {
|
|||
|
|
return -1;
|
|||
|
|
}
|
|||
|
|
this.err = false;
|
|||
|
|
let code1, code2, code3;
|
|||
|
|
if (this.nextLine2D) {
|
|||
|
|
for (i = 0; codingLine[i] < columns; ++i) {
|
|||
|
|
refLine[i] = codingLine[i];
|
|||
|
|
}
|
|||
|
|
refLine[i++] = columns;
|
|||
|
|
refLine[i] = columns;
|
|||
|
|
codingLine[0] = 0;
|
|||
|
|
this.codingPos = 0;
|
|||
|
|
refPos = 0;
|
|||
|
|
blackPixels = 0;
|
|||
|
|
while (codingLine[this.codingPos] < columns) {
|
|||
|
|
code1 = this._getTwoDimCode();
|
|||
|
|
switch (code1) {
|
|||
|
|
case twoDimPass:
|
|||
|
|
this._addPixels(refLine[refPos + 1], blackPixels);
|
|||
|
|
if (refLine[refPos + 1] < columns) {
|
|||
|
|
refPos += 2;
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case twoDimHoriz:
|
|||
|
|
code1 = code2 = 0;
|
|||
|
|
if (blackPixels) {
|
|||
|
|
do {
|
|||
|
|
code1 += code3 = this._getBlackCode();
|
|||
|
|
} while (code3 >= 64);
|
|||
|
|
do {
|
|||
|
|
code2 += code3 = this._getWhiteCode();
|
|||
|
|
} while (code3 >= 64);
|
|||
|
|
} else {
|
|||
|
|
do {
|
|||
|
|
code1 += code3 = this._getWhiteCode();
|
|||
|
|
} while (code3 >= 64);
|
|||
|
|
do {
|
|||
|
|
code2 += code3 = this._getBlackCode();
|
|||
|
|
} while (code3 >= 64);
|
|||
|
|
}
|
|||
|
|
this._addPixels(codingLine[this.codingPos] + code1, blackPixels);
|
|||
|
|
if (codingLine[this.codingPos] < columns) {
|
|||
|
|
this._addPixels(codingLine[this.codingPos] + code2, blackPixels ^ 1);
|
|||
|
|
}
|
|||
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|||
|
|
refPos += 2;
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case twoDimVertR3:
|
|||
|
|
this._addPixels(refLine[refPos] + 3, blackPixels);
|
|||
|
|
blackPixels ^= 1;
|
|||
|
|
if (codingLine[this.codingPos] < columns) {
|
|||
|
|
++refPos;
|
|||
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|||
|
|
refPos += 2;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case twoDimVertR2:
|
|||
|
|
this._addPixels(refLine[refPos] + 2, blackPixels);
|
|||
|
|
blackPixels ^= 1;
|
|||
|
|
if (codingLine[this.codingPos] < columns) {
|
|||
|
|
++refPos;
|
|||
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|||
|
|
refPos += 2;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case twoDimVertR1:
|
|||
|
|
this._addPixels(refLine[refPos] + 1, blackPixels);
|
|||
|
|
blackPixels ^= 1;
|
|||
|
|
if (codingLine[this.codingPos] < columns) {
|
|||
|
|
++refPos;
|
|||
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|||
|
|
refPos += 2;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case twoDimVert0:
|
|||
|
|
this._addPixels(refLine[refPos], blackPixels);
|
|||
|
|
blackPixels ^= 1;
|
|||
|
|
if (codingLine[this.codingPos] < columns) {
|
|||
|
|
++refPos;
|
|||
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|||
|
|
refPos += 2;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case twoDimVertL3:
|
|||
|
|
this._addPixelsNeg(refLine[refPos] - 3, blackPixels);
|
|||
|
|
blackPixels ^= 1;
|
|||
|
|
if (codingLine[this.codingPos] < columns) {
|
|||
|
|
if (refPos > 0) {
|
|||
|
|
--refPos;
|
|||
|
|
} else {
|
|||
|
|
++refPos;
|
|||
|
|
}
|
|||
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|||
|
|
refPos += 2;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case twoDimVertL2:
|
|||
|
|
this._addPixelsNeg(refLine[refPos] - 2, blackPixels);
|
|||
|
|
blackPixels ^= 1;
|
|||
|
|
if (codingLine[this.codingPos] < columns) {
|
|||
|
|
if (refPos > 0) {
|
|||
|
|
--refPos;
|
|||
|
|
} else {
|
|||
|
|
++refPos;
|
|||
|
|
}
|
|||
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|||
|
|
refPos += 2;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case twoDimVertL1:
|
|||
|
|
this._addPixelsNeg(refLine[refPos] - 1, blackPixels);
|
|||
|
|
blackPixels ^= 1;
|
|||
|
|
if (codingLine[this.codingPos] < columns) {
|
|||
|
|
if (refPos > 0) {
|
|||
|
|
--refPos;
|
|||
|
|
} else {
|
|||
|
|
++refPos;
|
|||
|
|
}
|
|||
|
|
while (refLine[refPos] <= codingLine[this.codingPos] && refLine[refPos] < columns) {
|
|||
|
|
refPos += 2;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case ccittEOF:
|
|||
|
|
this._addPixels(columns, 0);
|
|||
|
|
this.eof = true;
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
info("bad 2d code");
|
|||
|
|
this._addPixels(columns, 0);
|
|||
|
|
this.err = true;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
codingLine[0] = 0;
|
|||
|
|
this.codingPos = 0;
|
|||
|
|
blackPixels = 0;
|
|||
|
|
while (codingLine[this.codingPos] < columns) {
|
|||
|
|
code1 = 0;
|
|||
|
|
if (blackPixels) {
|
|||
|
|
do {
|
|||
|
|
code1 += code3 = this._getBlackCode();
|
|||
|
|
} while (code3 >= 64);
|
|||
|
|
} else {
|
|||
|
|
do {
|
|||
|
|
code1 += code3 = this._getWhiteCode();
|
|||
|
|
} while (code3 >= 64);
|
|||
|
|
}
|
|||
|
|
this._addPixels(codingLine[this.codingPos] + code1, blackPixels);
|
|||
|
|
blackPixels ^= 1;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
let gotEOL = false;
|
|||
|
|
if (this.byteAlign) {
|
|||
|
|
this.inputBits &= ~7;
|
|||
|
|
}
|
|||
|
|
if (!this.eoblock && this.row === this.rows - 1) {
|
|||
|
|
this.rowsDone = true;
|
|||
|
|
} else {
|
|||
|
|
code1 = this._lookBits(12);
|
|||
|
|
if (this.eoline) {
|
|||
|
|
while (code1 !== ccittEOF && code1 !== 1) {
|
|||
|
|
this._eatBits(1);
|
|||
|
|
code1 = this._lookBits(12);
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
while (code1 === 0) {
|
|||
|
|
this._eatBits(1);
|
|||
|
|
code1 = this._lookBits(12);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (code1 === 1) {
|
|||
|
|
this._eatBits(12);
|
|||
|
|
gotEOL = true;
|
|||
|
|
} else if (code1 === ccittEOF) {
|
|||
|
|
this.eof = true;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (!this.eof && this.encoding > 0 && !this.rowsDone) {
|
|||
|
|
this.nextLine2D = !this._lookBits(1);
|
|||
|
|
this._eatBits(1);
|
|||
|
|
}
|
|||
|
|
if (this.eoblock && gotEOL && this.byteAlign) {
|
|||
|
|
code1 = this._lookBits(12);
|
|||
|
|
if (code1 === 1) {
|
|||
|
|
this._eatBits(12);
|
|||
|
|
if (this.encoding > 0) {
|
|||
|
|
this._lookBits(1);
|
|||
|
|
this._eatBits(1);
|
|||
|
|
}
|
|||
|
|
if (this.encoding >= 0) {
|
|||
|
|
for (i = 0; i < 4; ++i) {
|
|||
|
|
code1 = this._lookBits(12);
|
|||
|
|
if (code1 !== 1) {
|
|||
|
|
info("bad rtc code: " + code1);
|
|||
|
|
}
|
|||
|
|
this._eatBits(12);
|
|||
|
|
if (this.encoding > 0) {
|
|||
|
|
this._lookBits(1);
|
|||
|
|
this._eatBits(1);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
this.eof = true;
|
|||
|
|
}
|
|||
|
|
} else if (this.err && this.eoline) {
|
|||
|
|
while (true) {
|
|||
|
|
code1 = this._lookBits(13);
|
|||
|
|
if (code1 === ccittEOF) {
|
|||
|
|
this.eof = true;
|
|||
|
|
return -1;
|
|||
|
|
}
|
|||
|
|
if (code1 >> 1 === 1) {
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
this._eatBits(1);
|
|||
|
|
}
|
|||
|
|
this._eatBits(12);
|
|||
|
|
if (this.encoding > 0) {
|
|||
|
|
this._eatBits(1);
|
|||
|
|
this.nextLine2D = !(code1 & 1);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
this.outputBits = codingLine[0] > 0 ? codingLine[this.codingPos = 0] : codingLine[this.codingPos = 1];
|
|||
|
|
this.row++;
|
|||
|
|
}
|
|||
|
|
let c;
|
|||
|
|
if (this.outputBits >= 8) {
|
|||
|
|
c = this.codingPos & 1 ? 0 : 0xff;
|
|||
|
|
this.outputBits -= 8;
|
|||
|
|
if (this.outputBits === 0 && codingLine[this.codingPos] < columns) {
|
|||
|
|
this.codingPos++;
|
|||
|
|
this.outputBits = codingLine[this.codingPos] - codingLine[this.codingPos - 1];
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
bits = 8;
|
|||
|
|
c = 0;
|
|||
|
|
do {
|
|||
|
|
if (typeof this.outputBits !== "number") {
|
|||
|
|
throw new FormatError('Invalid /CCITTFaxDecode data, "outputBits" must be a number.');
|
|||
|
|
}
|
|||
|
|
if (this.outputBits > bits) {
|
|||
|
|
c <<= bits;
|
|||
|
|
if (!(this.codingPos & 1)) {
|
|||
|
|
c |= 0xff >> 8 - bits;
|
|||
|
|
}
|
|||
|
|
this.outputBits -= bits;
|
|||
|
|
bits = 0;
|
|||
|
|
} else {
|
|||
|
|
c <<= this.outputBits;
|
|||
|
|
if (!(this.codingPos & 1)) {
|
|||
|
|
c |= 0xff >> 8 - this.outputBits;
|
|||
|
|
}
|
|||
|
|
bits -= this.outputBits;
|
|||
|
|
this.outputBits = 0;
|
|||
|
|
if (codingLine[this.codingPos] < columns) {
|
|||
|
|
this.codingPos++;
|
|||
|
|
this.outputBits = codingLine[this.codingPos] - codingLine[this.codingPos - 1];
|
|||
|
|
} else if (bits > 0) {
|
|||
|
|
c <<= bits;
|
|||
|
|
bits = 0;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
} while (bits);
|
|||
|
|
}
|
|||
|
|
if (this.black) {
|
|||
|
|
c ^= 0xff;
|
|||
|
|
}
|
|||
|
|
return c;
|
|||
|
|
}
|
|||
|
|
_addPixels(a1, blackPixels) {
|
|||
|
|
const codingLine = this.codingLine;
|
|||
|
|
let codingPos = this.codingPos;
|
|||
|
|
if (a1 > codingLine[codingPos]) {
|
|||
|
|
if (a1 > this.columns) {
|
|||
|
|
info("row is wrong length");
|
|||
|
|
this.err = true;
|
|||
|
|
a1 = this.columns;
|
|||
|
|
}
|
|||
|
|
if (codingPos & 1 ^ blackPixels) {
|
|||
|
|
++codingPos;
|
|||
|
|
}
|
|||
|
|
codingLine[codingPos] = a1;
|
|||
|
|
}
|
|||
|
|
this.codingPos = codingPos;
|
|||
|
|
}
|
|||
|
|
_addPixelsNeg(a1, blackPixels) {
|
|||
|
|
const codingLine = this.codingLine;
|
|||
|
|
let codingPos = this.codingPos;
|
|||
|
|
if (a1 > codingLine[codingPos]) {
|
|||
|
|
if (a1 > this.columns) {
|
|||
|
|
info("row is wrong length");
|
|||
|
|
this.err = true;
|
|||
|
|
a1 = this.columns;
|
|||
|
|
}
|
|||
|
|
if (codingPos & 1 ^ blackPixels) {
|
|||
|
|
++codingPos;
|
|||
|
|
}
|
|||
|
|
codingLine[codingPos] = a1;
|
|||
|
|
} else if (a1 < codingLine[codingPos]) {
|
|||
|
|
if (a1 < 0) {
|
|||
|
|
info("invalid code");
|
|||
|
|
this.err = true;
|
|||
|
|
a1 = 0;
|
|||
|
|
}
|
|||
|
|
while (codingPos > 0 && a1 < codingLine[codingPos - 1]) {
|
|||
|
|
--codingPos;
|
|||
|
|
}
|
|||
|
|
codingLine[codingPos] = a1;
|
|||
|
|
}
|
|||
|
|
this.codingPos = codingPos;
|
|||
|
|
}
|
|||
|
|
_findTableCode(start, end, table, limit) {
|
|||
|
|
const limitValue = limit || 0;
|
|||
|
|
for (let i = start; i <= end; ++i) {
|
|||
|
|
let code = this._lookBits(i);
|
|||
|
|
if (code === ccittEOF) {
|
|||
|
|
return [true, 1, false];
|
|||
|
|
}
|
|||
|
|
if (i < end) {
|
|||
|
|
code <<= end - i;
|
|||
|
|
}
|
|||
|
|
if (!limitValue || code >= limitValue) {
|
|||
|
|
const p = table[code - limitValue];
|
|||
|
|
if (p[0] === i) {
|
|||
|
|
this._eatBits(i);
|
|||
|
|
return [true, p[1], true];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return [false, 0, false];
|
|||
|
|
}
|
|||
|
|
_getTwoDimCode() {
|
|||
|
|
let code = 0;
|
|||
|
|
let p;
|
|||
|
|
if (this.eoblock) {
|
|||
|
|
code = this._lookBits(7);
|
|||
|
|
p = twoDimTable[code];
|
|||
|
|
if (p?.[0] > 0) {
|
|||
|
|
this._eatBits(p[0]);
|
|||
|
|
return p[1];
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
const result = this._findTableCode(1, 7, twoDimTable);
|
|||
|
|
if (result[0] && result[2]) {
|
|||
|
|
return result[1];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
info("Bad two dim code");
|
|||
|
|
return ccittEOF;
|
|||
|
|
}
|
|||
|
|
_getWhiteCode() {
|
|||
|
|
let code = 0;
|
|||
|
|
let p;
|
|||
|
|
if (this.eoblock) {
|
|||
|
|
code = this._lookBits(12);
|
|||
|
|
if (code === ccittEOF) {
|
|||
|
|
return 1;
|
|||
|
|
}
|
|||
|
|
p = code >> 5 === 0 ? whiteTable1[code] : whiteTable2[code >> 3];
|
|||
|
|
if (p[0] > 0) {
|
|||
|
|
this._eatBits(p[0]);
|
|||
|
|
return p[1];
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
let result = this._findTableCode(1, 9, whiteTable2);
|
|||
|
|
if (result[0]) {
|
|||
|
|
return result[1];
|
|||
|
|
}
|
|||
|
|
result = this._findTableCode(11, 12, whiteTable1);
|
|||
|
|
if (result[0]) {
|
|||
|
|
return result[1];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
info("bad white code");
|
|||
|
|
this._eatBits(1);
|
|||
|
|
return 1;
|
|||
|
|
}
|
|||
|
|
_getBlackCode() {
|
|||
|
|
let code, p;
|
|||
|
|
if (this.eoblock) {
|
|||
|
|
code = this._lookBits(13);
|
|||
|
|
if (code === ccittEOF) {
|
|||
|
|
return 1;
|
|||
|
|
}
|
|||
|
|
if (code >> 7 === 0) {
|
|||
|
|
p = blackTable1[code];
|
|||
|
|
} else if (code >> 9 === 0 && code >> 7 !== 0) {
|
|||
|
|
p = blackTable2[(code >> 1) - 64];
|
|||
|
|
} else {
|
|||
|
|
p = blackTable3[code >> 7];
|
|||
|
|
}
|
|||
|
|
if (p[0] > 0) {
|
|||
|
|
this._eatBits(p[0]);
|
|||
|
|
return p[1];
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
let result = this._findTableCode(2, 6, blackTable3);
|
|||
|
|
if (result[0]) {
|
|||
|
|
return result[1];
|
|||
|
|
}
|
|||
|
|
result = this._findTableCode(7, 12, blackTable2, 64);
|
|||
|
|
if (result[0]) {
|
|||
|
|
return result[1];
|
|||
|
|
}
|
|||
|
|
result = this._findTableCode(10, 13, blackTable1);
|
|||
|
|
if (result[0]) {
|
|||
|
|
return result[1];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
info("bad black code");
|
|||
|
|
this._eatBits(1);
|
|||
|
|
return 1;
|
|||
|
|
}
|
|||
|
|
_lookBits(n) {
|
|||
|
|
let c;
|
|||
|
|
while (this.inputBits < n) {
|
|||
|
|
if ((c = this.source.next()) === -1) {
|
|||
|
|
if (this.inputBits === 0) {
|
|||
|
|
return ccittEOF;
|
|||
|
|
}
|
|||
|
|
return this.inputBuf << n - this.inputBits & 0xffff >> 16 - n;
|
|||
|
|
}
|
|||
|
|
this.inputBuf = this.inputBuf << 8 | c;
|
|||
|
|
this.inputBits += 8;
|
|||
|
|
}
|
|||
|
|
return this.inputBuf >> this.inputBits - n & 0xffff >> 16 - n;
|
|||
|
|
}
|
|||
|
|
_eatBits(n) {
|
|||
|
|
if ((this.inputBits -= n) < 0) {
|
|||
|
|
this.inputBits = 0;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./src/core/jbig2.js
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
class Jbig2Error extends BaseException {
|
|||
|
|
constructor(msg) {
|
|||
|
|
super(msg, "Jbig2Error");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class ContextCache {
|
|||
|
|
getContexts(id) {
|
|||
|
|
if (id in this) {
|
|||
|
|
return this[id];
|
|||
|
|
}
|
|||
|
|
return this[id] = new Int8Array(1 << 16);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class DecodingContext {
|
|||
|
|
constructor(data, start, end) {
|
|||
|
|
this.data = data;
|
|||
|
|
this.start = start;
|
|||
|
|
this.end = end;
|
|||
|
|
}
|
|||
|
|
get decoder() {
|
|||
|
|
const decoder = new ArithmeticDecoder(this.data, this.start, this.end);
|
|||
|
|
return shadow(this, "decoder", decoder);
|
|||
|
|
}
|
|||
|
|
get contextCache() {
|
|||
|
|
const cache = new ContextCache();
|
|||
|
|
return shadow(this, "contextCache", cache);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function decodeInteger(contextCache, procedure, decoder) {
|
|||
|
|
const contexts = contextCache.getContexts(procedure);
|
|||
|
|
let prev = 1;
|
|||
|
|
function readBits(length) {
|
|||
|
|
let v = 0;
|
|||
|
|
for (let i = 0; i < length; i++) {
|
|||
|
|
const bit = decoder.readBit(contexts, prev);
|
|||
|
|
prev = prev < 256 ? prev << 1 | bit : (prev << 1 | bit) & 511 | 256;
|
|||
|
|
v = v << 1 | bit;
|
|||
|
|
}
|
|||
|
|
return v >>> 0;
|
|||
|
|
}
|
|||
|
|
const sign = readBits(1);
|
|||
|
|
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);
|
|||
|
|
let signedValue;
|
|||
|
|
if (sign === 0) {
|
|||
|
|
signedValue = value;
|
|||
|
|
} else if (value > 0) {
|
|||
|
|
signedValue = -value;
|
|||
|
|
}
|
|||
|
|
if (signedValue >= MIN_INT_32 && signedValue <= MAX_INT_32) {
|
|||
|
|
return signedValue;
|
|||
|
|
}
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
function decodeIAID(contextCache, decoder, codeLength) {
|
|||
|
|
const contexts = contextCache.getContexts("IAID");
|
|||
|
|
let prev = 1;
|
|||
|
|
for (let i = 0; i < codeLength; i++) {
|
|||
|
|
const bit = decoder.readBit(contexts, prev);
|
|||
|
|
prev = prev << 1 | bit;
|
|||
|
|
}
|
|||
|
|
if (codeLength < 31) {
|
|||
|
|
return prev & (1 << codeLength) - 1;
|
|||
|
|
}
|
|||
|
|
return prev & 0x7fffffff;
|
|||
|
|
}
|
|||
|
|
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"];
|
|||
|
|
const CodingTemplates = [[{
|
|||
|
|
x: -1,
|
|||
|
|
y: -2
|
|||
|
|
}, {
|
|||
|
|
x: 0,
|
|||
|
|
y: -2
|
|||
|
|
}, {
|
|||
|
|
x: 1,
|
|||
|
|
y: -2
|
|||
|
|
}, {
|
|||
|
|
x: -2,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: -1,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 0,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 1,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 2,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: -4,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: -3,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: -2,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: -1,
|
|||
|
|
y: 0
|
|||
|
|
}], [{
|
|||
|
|
x: -1,
|
|||
|
|
y: -2
|
|||
|
|
}, {
|
|||
|
|
x: 0,
|
|||
|
|
y: -2
|
|||
|
|
}, {
|
|||
|
|
x: 1,
|
|||
|
|
y: -2
|
|||
|
|
}, {
|
|||
|
|
x: 2,
|
|||
|
|
y: -2
|
|||
|
|
}, {
|
|||
|
|
x: -2,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: -1,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 0,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 1,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 2,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: -3,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: -2,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: -1,
|
|||
|
|
y: 0
|
|||
|
|
}], [{
|
|||
|
|
x: -1,
|
|||
|
|
y: -2
|
|||
|
|
}, {
|
|||
|
|
x: 0,
|
|||
|
|
y: -2
|
|||
|
|
}, {
|
|||
|
|
x: 1,
|
|||
|
|
y: -2
|
|||
|
|
}, {
|
|||
|
|
x: -2,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: -1,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 0,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 1,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: -2,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: -1,
|
|||
|
|
y: 0
|
|||
|
|
}], [{
|
|||
|
|
x: -3,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: -2,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: -1,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 0,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 1,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: -4,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: -3,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: -2,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: -1,
|
|||
|
|
y: 0
|
|||
|
|
}]];
|
|||
|
|
const RefinementTemplates = [{
|
|||
|
|
coding: [{
|
|||
|
|
x: 0,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 1,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: -1,
|
|||
|
|
y: 0
|
|||
|
|
}],
|
|||
|
|
reference: [{
|
|||
|
|
x: 0,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 1,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: -1,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: 0,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: 1,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: -1,
|
|||
|
|
y: 1
|
|||
|
|
}, {
|
|||
|
|
x: 0,
|
|||
|
|
y: 1
|
|||
|
|
}, {
|
|||
|
|
x: 1,
|
|||
|
|
y: 1
|
|||
|
|
}]
|
|||
|
|
}, {
|
|||
|
|
coding: [{
|
|||
|
|
x: -1,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 0,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 1,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: -1,
|
|||
|
|
y: 0
|
|||
|
|
}],
|
|||
|
|
reference: [{
|
|||
|
|
x: 0,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: -1,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: 0,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: 1,
|
|||
|
|
y: 0
|
|||
|
|
}, {
|
|||
|
|
x: 0,
|
|||
|
|
y: 1
|
|||
|
|
}, {
|
|||
|
|
x: 1,
|
|||
|
|
y: 1
|
|||
|
|
}]
|
|||
|
|
}];
|
|||
|
|
const ReusedContexts = [0x9b25, 0x0795, 0x00e5, 0x0195];
|
|||
|
|
const RefinementReusedContexts = [0x0020, 0x0008];
|
|||
|
|
function decodeBitmapTemplate0(width, height, decodingContext) {
|
|||
|
|
const decoder = decodingContext.decoder;
|
|||
|
|
const contexts = decodingContext.contextCache.getContexts("GB");
|
|||
|
|
const bitmap = [];
|
|||
|
|
let contextLabel, i, j, pixel, row, row1, row2;
|
|||
|
|
const OLD_PIXEL_MASK = 0x7bf7;
|
|||
|
|
for (i = 0; i < height; i++) {
|
|||
|
|
row = bitmap[i] = new Uint8Array(width);
|
|||
|
|
row1 = i < 1 ? row : bitmap[i - 1];
|
|||
|
|
row2 = i < 2 ? row : bitmap[i - 2];
|
|||
|
|
contextLabel = row2[0] << 13 | row2[1] << 12 | row2[2] << 11 | row1[0] << 7 | row1[1] << 6 | row1[2] << 5 | row1[3] << 4;
|
|||
|
|
for (j = 0; j < width; j++) {
|
|||
|
|
row[j] = pixel = decoder.readBit(contexts, contextLabel);
|
|||
|
|
contextLabel = (contextLabel & OLD_PIXEL_MASK) << 1 | (j + 3 < width ? row2[j + 3] << 11 : 0) | (j + 4 < width ? row1[j + 4] << 4 : 0) | pixel;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return bitmap;
|
|||
|
|
}
|
|||
|
|
function decodeBitmap(mmr, width, height, templateIndex, prediction, skip, at, decodingContext) {
|
|||
|
|
if (mmr) {
|
|||
|
|
const input = new Reader(decodingContext.data, decodingContext.start, decodingContext.end);
|
|||
|
|
return decodeMMRBitmap(input, width, height, false);
|
|||
|
|
}
|
|||
|
|
if (templateIndex === 0 && !skip && !prediction && at.length === 4 && at[0].x === 3 && at[0].y === -1 && at[1].x === -3 && at[1].y === -1 && at[2].x === 2 && at[2].y === -2 && at[3].x === -2 && at[3].y === -2) {
|
|||
|
|
return decodeBitmapTemplate0(width, height, decodingContext);
|
|||
|
|
}
|
|||
|
|
const useskip = !!skip;
|
|||
|
|
const template = CodingTemplates[templateIndex].concat(at);
|
|||
|
|
template.sort((a, b) => a.y - b.y || a.x - b.x);
|
|||
|
|
const templateLength = template.length;
|
|||
|
|
const templateX = new Int8Array(templateLength);
|
|||
|
|
const templateY = new Int8Array(templateLength);
|
|||
|
|
const changingTemplateEntries = [];
|
|||
|
|
let reuseMask = 0,
|
|||
|
|
minX = 0,
|
|||
|
|
maxX = 0,
|
|||
|
|
minY = 0;
|
|||
|
|
let c, k;
|
|||
|
|
for (k = 0; k < templateLength; k++) {
|
|||
|
|
templateX[k] = template[k].x;
|
|||
|
|
templateY[k] = template[k].y;
|
|||
|
|
minX = Math.min(minX, template[k].x);
|
|||
|
|
maxX = Math.max(maxX, template[k].x);
|
|||
|
|
minY = Math.min(minY, template[k].y);
|
|||
|
|
if (k < templateLength - 1 && template[k].y === template[k + 1].y && template[k].x === template[k + 1].x - 1) {
|
|||
|
|
reuseMask |= 1 << templateLength - 1 - k;
|
|||
|
|
} else {
|
|||
|
|
changingTemplateEntries.push(k);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const changingEntriesLength = changingTemplateEntries.length;
|
|||
|
|
const changingTemplateX = new Int8Array(changingEntriesLength);
|
|||
|
|
const changingTemplateY = new Int8Array(changingEntriesLength);
|
|||
|
|
const changingTemplateBit = new Uint16Array(changingEntriesLength);
|
|||
|
|
for (c = 0; c < changingEntriesLength; c++) {
|
|||
|
|
k = changingTemplateEntries[c];
|
|||
|
|
changingTemplateX[c] = template[k].x;
|
|||
|
|
changingTemplateY[c] = template[k].y;
|
|||
|
|
changingTemplateBit[c] = 1 << templateLength - 1 - k;
|
|||
|
|
}
|
|||
|
|
const sbb_left = -minX;
|
|||
|
|
const sbb_top = -minY;
|
|||
|
|
const sbb_right = width - maxX;
|
|||
|
|
const pseudoPixelContext = ReusedContexts[templateIndex];
|
|||
|
|
let row = new Uint8Array(width);
|
|||
|
|
const bitmap = [];
|
|||
|
|
const decoder = decodingContext.decoder;
|
|||
|
|
const contexts = decodingContext.contextCache.getContexts("GB");
|
|||
|
|
let ltp = 0,
|
|||
|
|
j,
|
|||
|
|
i0,
|
|||
|
|
j0,
|
|||
|
|
contextLabel = 0,
|
|||
|
|
bit,
|
|||
|
|
shift;
|
|||
|
|
for (let i = 0; i < height; i++) {
|
|||
|
|
if (prediction) {
|
|||
|
|
const sltp = decoder.readBit(contexts, pseudoPixelContext);
|
|||
|
|
ltp ^= sltp;
|
|||
|
|
if (ltp) {
|
|||
|
|
bitmap.push(row);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
row = new Uint8Array(row);
|
|||
|
|
bitmap.push(row);
|
|||
|
|
for (j = 0; j < width; j++) {
|
|||
|
|
if (useskip && skip[i][j]) {
|
|||
|
|
row[j] = 0;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
if (j >= sbb_left && j < sbb_right && i >= sbb_top) {
|
|||
|
|
contextLabel = contextLabel << 1 & reuseMask;
|
|||
|
|
for (k = 0; k < changingEntriesLength; k++) {
|
|||
|
|
i0 = i + changingTemplateY[k];
|
|||
|
|
j0 = j + changingTemplateX[k];
|
|||
|
|
bit = bitmap[i0][j0];
|
|||
|
|
if (bit) {
|
|||
|
|
bit = changingTemplateBit[k];
|
|||
|
|
contextLabel |= bit;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
contextLabel = 0;
|
|||
|
|
shift = templateLength - 1;
|
|||
|
|
for (k = 0; k < templateLength; k++, shift--) {
|
|||
|
|
j0 = j + templateX[k];
|
|||
|
|
if (j0 >= 0 && j0 < width) {
|
|||
|
|
i0 = i + templateY[k];
|
|||
|
|
if (i0 >= 0) {
|
|||
|
|
bit = bitmap[i0][j0];
|
|||
|
|
if (bit) {
|
|||
|
|
contextLabel |= bit << shift;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const pixel = decoder.readBit(contexts, contextLabel);
|
|||
|
|
row[j] = pixel;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return bitmap;
|
|||
|
|
}
|
|||
|
|
function decodeRefinement(width, height, templateIndex, referenceBitmap, offsetX, offsetY, prediction, at, decodingContext) {
|
|||
|
|
let codingTemplate = RefinementTemplates[templateIndex].coding;
|
|||
|
|
if (templateIndex === 0) {
|
|||
|
|
codingTemplate = codingTemplate.concat([at[0]]);
|
|||
|
|
}
|
|||
|
|
const codingTemplateLength = codingTemplate.length;
|
|||
|
|
const codingTemplateX = new Int32Array(codingTemplateLength);
|
|||
|
|
const codingTemplateY = new Int32Array(codingTemplateLength);
|
|||
|
|
let k;
|
|||
|
|
for (k = 0; k < codingTemplateLength; k++) {
|
|||
|
|
codingTemplateX[k] = codingTemplate[k].x;
|
|||
|
|
codingTemplateY[k] = codingTemplate[k].y;
|
|||
|
|
}
|
|||
|
|
let referenceTemplate = RefinementTemplates[templateIndex].reference;
|
|||
|
|
if (templateIndex === 0) {
|
|||
|
|
referenceTemplate = referenceTemplate.concat([at[1]]);
|
|||
|
|
}
|
|||
|
|
const referenceTemplateLength = referenceTemplate.length;
|
|||
|
|
const referenceTemplateX = new Int32Array(referenceTemplateLength);
|
|||
|
|
const referenceTemplateY = new Int32Array(referenceTemplateLength);
|
|||
|
|
for (k = 0; k < referenceTemplateLength; k++) {
|
|||
|
|
referenceTemplateX[k] = referenceTemplate[k].x;
|
|||
|
|
referenceTemplateY[k] = referenceTemplate[k].y;
|
|||
|
|
}
|
|||
|
|
const referenceWidth = referenceBitmap[0].length;
|
|||
|
|
const referenceHeight = referenceBitmap.length;
|
|||
|
|
const pseudoPixelContext = RefinementReusedContexts[templateIndex];
|
|||
|
|
const bitmap = [];
|
|||
|
|
const decoder = decodingContext.decoder;
|
|||
|
|
const contexts = decodingContext.contextCache.getContexts("GR");
|
|||
|
|
let ltp = 0;
|
|||
|
|
for (let i = 0; i < height; i++) {
|
|||
|
|
if (prediction) {
|
|||
|
|
const sltp = decoder.readBit(contexts, pseudoPixelContext);
|
|||
|
|
ltp ^= sltp;
|
|||
|
|
if (ltp) {
|
|||
|
|
throw new Jbig2Error("prediction is not supported");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const row = new Uint8Array(width);
|
|||
|
|
bitmap.push(row);
|
|||
|
|
for (let j = 0; j < width; j++) {
|
|||
|
|
let i0, j0;
|
|||
|
|
let contextLabel = 0;
|
|||
|
|
for (k = 0; k < codingTemplateLength; k++) {
|
|||
|
|
i0 = i + codingTemplateY[k];
|
|||
|
|
j0 = j + codingTemplateX[k];
|
|||
|
|
if (i0 < 0 || j0 < 0 || j0 >= width) {
|
|||
|
|
contextLabel <<= 1;
|
|||
|
|
} else {
|
|||
|
|
contextLabel = contextLabel << 1 | bitmap[i0][j0];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
for (k = 0; k < referenceTemplateLength; k++) {
|
|||
|
|
i0 = i + referenceTemplateY[k] - offsetY;
|
|||
|
|
j0 = j + referenceTemplateX[k] - offsetX;
|
|||
|
|
if (i0 < 0 || i0 >= referenceHeight || j0 < 0 || j0 >= referenceWidth) {
|
|||
|
|
contextLabel <<= 1;
|
|||
|
|
} else {
|
|||
|
|
contextLabel = contextLabel << 1 | referenceBitmap[i0][j0];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const pixel = decoder.readBit(contexts, contextLabel);
|
|||
|
|
row[j] = pixel;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return bitmap;
|
|||
|
|
}
|
|||
|
|
function decodeSymbolDictionary(huffman, refinement, symbols, numberOfNewSymbols, numberOfExportedSymbols, huffmanTables, templateIndex, at, refinementTemplateIndex, refinementAt, decodingContext, huffmanInput) {
|
|||
|
|
if (huffman && refinement) {
|
|||
|
|
throw new Jbig2Error("symbol refinement with Huffman is not supported");
|
|||
|
|
}
|
|||
|
|
const newSymbols = [];
|
|||
|
|
let currentHeight = 0;
|
|||
|
|
let symbolCodeLength = log2(symbols.length + numberOfNewSymbols);
|
|||
|
|
const decoder = decodingContext.decoder;
|
|||
|
|
const contextCache = decodingContext.contextCache;
|
|||
|
|
let tableB1, symbolWidths;
|
|||
|
|
if (huffman) {
|
|||
|
|
tableB1 = getStandardTable(1);
|
|||
|
|
symbolWidths = [];
|
|||
|
|
symbolCodeLength = Math.max(symbolCodeLength, 1);
|
|||
|
|
}
|
|||
|
|
while (newSymbols.length < numberOfNewSymbols) {
|
|||
|
|
const deltaHeight = huffman ? huffmanTables.tableDeltaHeight.decode(huffmanInput) : decodeInteger(contextCache, "IADH", decoder);
|
|||
|
|
currentHeight += deltaHeight;
|
|||
|
|
let currentWidth = 0,
|
|||
|
|
totalWidth = 0;
|
|||
|
|
const firstSymbol = huffman ? symbolWidths.length : 0;
|
|||
|
|
while (true) {
|
|||
|
|
const deltaWidth = huffman ? huffmanTables.tableDeltaWidth.decode(huffmanInput) : decodeInteger(contextCache, "IADW", decoder);
|
|||
|
|
if (deltaWidth === null) {
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
currentWidth += deltaWidth;
|
|||
|
|
totalWidth += currentWidth;
|
|||
|
|
let bitmap;
|
|||
|
|
if (refinement) {
|
|||
|
|
const numberOfInstances = decodeInteger(contextCache, "IAAI", decoder);
|
|||
|
|
if (numberOfInstances > 1) {
|
|||
|
|
bitmap = decodeTextRegion(huffman, refinement, currentWidth, currentHeight, 0, numberOfInstances, 1, symbols.concat(newSymbols), symbolCodeLength, 0, 0, 1, 0, huffmanTables, refinementTemplateIndex, refinementAt, decodingContext, 0, huffmanInput);
|
|||
|
|
} else {
|
|||
|
|
const symbolId = decodeIAID(contextCache, decoder, symbolCodeLength);
|
|||
|
|
const rdx = decodeInteger(contextCache, "IARDX", decoder);
|
|||
|
|
const rdy = decodeInteger(contextCache, "IARDY", decoder);
|
|||
|
|
const symbol = symbolId < symbols.length ? symbols[symbolId] : newSymbols[symbolId - symbols.length];
|
|||
|
|
bitmap = decodeRefinement(currentWidth, currentHeight, refinementTemplateIndex, symbol, rdx, rdy, false, refinementAt, decodingContext);
|
|||
|
|
}
|
|||
|
|
newSymbols.push(bitmap);
|
|||
|
|
} else if (huffman) {
|
|||
|
|
symbolWidths.push(currentWidth);
|
|||
|
|
} else {
|
|||
|
|
bitmap = decodeBitmap(false, currentWidth, currentHeight, templateIndex, false, null, at, decodingContext);
|
|||
|
|
newSymbols.push(bitmap);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (huffman && !refinement) {
|
|||
|
|
const bitmapSize = huffmanTables.tableBitmapSize.decode(huffmanInput);
|
|||
|
|
huffmanInput.byteAlign();
|
|||
|
|
let collectiveBitmap;
|
|||
|
|
if (bitmapSize === 0) {
|
|||
|
|
collectiveBitmap = readUncompressedBitmap(huffmanInput, totalWidth, currentHeight);
|
|||
|
|
} else {
|
|||
|
|
const originalEnd = huffmanInput.end;
|
|||
|
|
const bitmapEnd = huffmanInput.position + bitmapSize;
|
|||
|
|
huffmanInput.end = bitmapEnd;
|
|||
|
|
collectiveBitmap = decodeMMRBitmap(huffmanInput, totalWidth, currentHeight, false);
|
|||
|
|
huffmanInput.end = originalEnd;
|
|||
|
|
huffmanInput.position = bitmapEnd;
|
|||
|
|
}
|
|||
|
|
const numberOfSymbolsDecoded = symbolWidths.length;
|
|||
|
|
if (firstSymbol === numberOfSymbolsDecoded - 1) {
|
|||
|
|
newSymbols.push(collectiveBitmap);
|
|||
|
|
} else {
|
|||
|
|
let i,
|
|||
|
|
y,
|
|||
|
|
xMin = 0,
|
|||
|
|
xMax,
|
|||
|
|
bitmapWidth,
|
|||
|
|
symbolBitmap;
|
|||
|
|
for (i = firstSymbol; i < numberOfSymbolsDecoded; i++) {
|
|||
|
|
bitmapWidth = symbolWidths[i];
|
|||
|
|
xMax = xMin + bitmapWidth;
|
|||
|
|
symbolBitmap = [];
|
|||
|
|
for (y = 0; y < currentHeight; y++) {
|
|||
|
|
symbolBitmap.push(collectiveBitmap[y].subarray(xMin, xMax));
|
|||
|
|
}
|
|||
|
|
newSymbols.push(symbolBitmap);
|
|||
|
|
xMin = xMax;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const exportedSymbols = [],
|
|||
|
|
flags = [];
|
|||
|
|
let currentFlag = false,
|
|||
|
|
i,
|
|||
|
|
ii;
|
|||
|
|
const totalSymbolsLength = symbols.length + numberOfNewSymbols;
|
|||
|
|
while (flags.length < totalSymbolsLength) {
|
|||
|
|
let runLength = huffman ? tableB1.decode(huffmanInput) : decodeInteger(contextCache, "IAEX", decoder);
|
|||
|
|
while (runLength--) {
|
|||
|
|
flags.push(currentFlag);
|
|||
|
|
}
|
|||
|
|
currentFlag = !currentFlag;
|
|||
|
|
}
|
|||
|
|
for (i = 0, ii = symbols.length; i < ii; i++) {
|
|||
|
|
if (flags[i]) {
|
|||
|
|
exportedSymbols.push(symbols[i]);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
for (let j = 0; j < numberOfNewSymbols; i++, j++) {
|
|||
|
|
if (flags[i]) {
|
|||
|
|
exportedSymbols.push(newSymbols[j]);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return exportedSymbols;
|
|||
|
|
}
|
|||
|
|
function decodeTextRegion(huffman, refinement, width, height, defaultPixelValue, numberOfSymbolInstances, stripSize, inputSymbols, symbolCodeLength, transposed, dsOffset, referenceCorner, combinationOperator, huffmanTables, refinementTemplateIndex, refinementAt, decodingContext, logStripSize, huffmanInput) {
|
|||
|
|
if (huffman && refinement) {
|
|||
|
|
throw new Jbig2Error("refinement with Huffman is not supported");
|
|||
|
|
}
|
|||
|
|
const bitmap = [];
|
|||
|
|
let i, row;
|
|||
|
|
for (i = 0; i < height; i++) {
|
|||
|
|
row = new Uint8Array(width);
|
|||
|
|
if (defaultPixelValue) {
|
|||
|
|
row.fill(defaultPixelValue);
|
|||
|
|
}
|
|||
|
|
bitmap.push(row);
|
|||
|
|
}
|
|||
|
|
const decoder = decodingContext.decoder;
|
|||
|
|
const contextCache = decodingContext.contextCache;
|
|||
|
|
let stripT = huffman ? -huffmanTables.tableDeltaT.decode(huffmanInput) : -decodeInteger(contextCache, "IADT", decoder);
|
|||
|
|
let firstS = 0;
|
|||
|
|
i = 0;
|
|||
|
|
while (i < numberOfSymbolInstances) {
|
|||
|
|
const deltaT = huffman ? huffmanTables.tableDeltaT.decode(huffmanInput) : decodeInteger(contextCache, "IADT", decoder);
|
|||
|
|
stripT += deltaT;
|
|||
|
|
const deltaFirstS = huffman ? huffmanTables.tableFirstS.decode(huffmanInput) : decodeInteger(contextCache, "IAFS", decoder);
|
|||
|
|
firstS += deltaFirstS;
|
|||
|
|
let currentS = firstS;
|
|||
|
|
do {
|
|||
|
|
let currentT = 0;
|
|||
|
|
if (stripSize > 1) {
|
|||
|
|
currentT = huffman ? huffmanInput.readBits(logStripSize) : decodeInteger(contextCache, "IAIT", decoder);
|
|||
|
|
}
|
|||
|
|
const t = stripSize * stripT + currentT;
|
|||
|
|
const symbolId = huffman ? huffmanTables.symbolIDTable.decode(huffmanInput) : decodeIAID(contextCache, decoder, symbolCodeLength);
|
|||
|
|
const applyRefinement = refinement && (huffman ? huffmanInput.readBit() : decodeInteger(contextCache, "IARI", decoder));
|
|||
|
|
let symbolBitmap = inputSymbols[symbolId];
|
|||
|
|
let symbolWidth = symbolBitmap[0].length;
|
|||
|
|
let symbolHeight = symbolBitmap.length;
|
|||
|
|
if (applyRefinement) {
|
|||
|
|
const rdw = decodeInteger(contextCache, "IARDW", decoder);
|
|||
|
|
const rdh = decodeInteger(contextCache, "IARDH", decoder);
|
|||
|
|
const rdx = decodeInteger(contextCache, "IARDX", decoder);
|
|||
|
|
const rdy = decodeInteger(contextCache, "IARDY", decoder);
|
|||
|
|
symbolWidth += rdw;
|
|||
|
|
symbolHeight += rdh;
|
|||
|
|
symbolBitmap = decodeRefinement(symbolWidth, symbolHeight, refinementTemplateIndex, symbolBitmap, (rdw >> 1) + rdx, (rdh >> 1) + rdy, false, refinementAt, decodingContext);
|
|||
|
|
}
|
|||
|
|
let increment = 0;
|
|||
|
|
if (!transposed) {
|
|||
|
|
if (referenceCorner > 1) {
|
|||
|
|
currentS += symbolWidth - 1;
|
|||
|
|
} else {
|
|||
|
|
increment = symbolWidth - 1;
|
|||
|
|
}
|
|||
|
|
} else if (!(referenceCorner & 1)) {
|
|||
|
|
currentS += symbolHeight - 1;
|
|||
|
|
} else {
|
|||
|
|
increment = symbolHeight - 1;
|
|||
|
|
}
|
|||
|
|
const offsetT = t - (referenceCorner & 1 ? 0 : symbolHeight - 1);
|
|||
|
|
const offsetS = currentS - (referenceCorner & 2 ? symbolWidth - 1 : 0);
|
|||
|
|
let s2, t2, symbolRow;
|
|||
|
|
if (transposed) {
|
|||
|
|
for (s2 = 0; s2 < symbolHeight; s2++) {
|
|||
|
|
row = bitmap[offsetS + s2];
|
|||
|
|
if (!row) {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
symbolRow = symbolBitmap[s2];
|
|||
|
|
const maxWidth = Math.min(width - offsetT, symbolWidth);
|
|||
|
|
switch (combinationOperator) {
|
|||
|
|
case 0:
|
|||
|
|
for (t2 = 0; t2 < maxWidth; t2++) {
|
|||
|
|
row[offsetT + t2] |= symbolRow[t2];
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case 2:
|
|||
|
|
for (t2 = 0; t2 < maxWidth; t2++) {
|
|||
|
|
row[offsetT + t2] ^= symbolRow[t2];
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
throw new Jbig2Error(`operator ${combinationOperator} is not supported`);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
for (t2 = 0; t2 < symbolHeight; t2++) {
|
|||
|
|
row = bitmap[offsetT + t2];
|
|||
|
|
if (!row) {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
symbolRow = symbolBitmap[t2];
|
|||
|
|
switch (combinationOperator) {
|
|||
|
|
case 0:
|
|||
|
|
for (s2 = 0; s2 < symbolWidth; s2++) {
|
|||
|
|
row[offsetS + s2] |= symbolRow[s2];
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case 2:
|
|||
|
|
for (s2 = 0; s2 < symbolWidth; s2++) {
|
|||
|
|
row[offsetS + s2] ^= symbolRow[s2];
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
throw new Jbig2Error(`operator ${combinationOperator} is not supported`);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
i++;
|
|||
|
|
const deltaS = huffman ? huffmanTables.tableDeltaS.decode(huffmanInput) : decodeInteger(contextCache, "IADS", decoder);
|
|||
|
|
if (deltaS === null) {
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
currentS += increment + deltaS + dsOffset;
|
|||
|
|
} while (true);
|
|||
|
|
}
|
|||
|
|
return bitmap;
|
|||
|
|
}
|
|||
|
|
function decodePatternDictionary(mmr, patternWidth, patternHeight, maxPatternIndex, template, decodingContext) {
|
|||
|
|
const at = [];
|
|||
|
|
if (!mmr) {
|
|||
|
|
at.push({
|
|||
|
|
x: -patternWidth,
|
|||
|
|
y: 0
|
|||
|
|
});
|
|||
|
|
if (template === 0) {
|
|||
|
|
at.push({
|
|||
|
|
x: -3,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 2,
|
|||
|
|
y: -2
|
|||
|
|
}, {
|
|||
|
|
x: -2,
|
|||
|
|
y: -2
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const collectiveWidth = (maxPatternIndex + 1) * patternWidth;
|
|||
|
|
const collectiveBitmap = decodeBitmap(mmr, collectiveWidth, patternHeight, template, false, null, at, decodingContext);
|
|||
|
|
const patterns = [];
|
|||
|
|
for (let i = 0; i <= maxPatternIndex; i++) {
|
|||
|
|
const patternBitmap = [];
|
|||
|
|
const xMin = patternWidth * i;
|
|||
|
|
const xMax = xMin + patternWidth;
|
|||
|
|
for (let y = 0; y < patternHeight; y++) {
|
|||
|
|
patternBitmap.push(collectiveBitmap[y].subarray(xMin, xMax));
|
|||
|
|
}
|
|||
|
|
patterns.push(patternBitmap);
|
|||
|
|
}
|
|||
|
|
return patterns;
|
|||
|
|
}
|
|||
|
|
function decodeHalftoneRegion(mmr, patterns, template, regionWidth, regionHeight, defaultPixelValue, enableSkip, combinationOperator, gridWidth, gridHeight, gridOffsetX, gridOffsetY, gridVectorX, gridVectorY, decodingContext) {
|
|||
|
|
const skip = null;
|
|||
|
|
if (enableSkip) {
|
|||
|
|
throw new Jbig2Error("skip is not supported");
|
|||
|
|
}
|
|||
|
|
if (combinationOperator !== 0) {
|
|||
|
|
throw new Jbig2Error(`operator "${combinationOperator}" is not supported in halftone region`);
|
|||
|
|
}
|
|||
|
|
const regionBitmap = [];
|
|||
|
|
let i, j, row;
|
|||
|
|
for (i = 0; i < regionHeight; i++) {
|
|||
|
|
row = new Uint8Array(regionWidth);
|
|||
|
|
if (defaultPixelValue) {
|
|||
|
|
row.fill(defaultPixelValue);
|
|||
|
|
}
|
|||
|
|
regionBitmap.push(row);
|
|||
|
|
}
|
|||
|
|
const numberOfPatterns = patterns.length;
|
|||
|
|
const pattern0 = patterns[0];
|
|||
|
|
const patternWidth = pattern0[0].length,
|
|||
|
|
patternHeight = pattern0.length;
|
|||
|
|
const bitsPerValue = log2(numberOfPatterns);
|
|||
|
|
const at = [];
|
|||
|
|
if (!mmr) {
|
|||
|
|
at.push({
|
|||
|
|
x: template <= 1 ? 3 : 2,
|
|||
|
|
y: -1
|
|||
|
|
});
|
|||
|
|
if (template === 0) {
|
|||
|
|
at.push({
|
|||
|
|
x: -3,
|
|||
|
|
y: -1
|
|||
|
|
}, {
|
|||
|
|
x: 2,
|
|||
|
|
y: -2
|
|||
|
|
}, {
|
|||
|
|
x: -2,
|
|||
|
|
y: -2
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const grayScaleBitPlanes = [];
|
|||
|
|
let mmrInput, bitmap;
|
|||
|
|
if (mmr) {
|
|||
|
|
mmrInput = new Reader(decodingContext.data, decodingContext.start, decodingContext.end);
|
|||
|
|
}
|
|||
|
|
for (i = bitsPerValue - 1; i >= 0; i--) {
|
|||
|
|
if (mmr) {
|
|||
|
|
bitmap = decodeMMRBitmap(mmrInput, gridWidth, gridHeight, true);
|
|||
|
|
} else {
|
|||
|
|
bitmap = decodeBitmap(false, gridWidth, gridHeight, template, false, skip, at, decodingContext);
|
|||
|
|
}
|
|||
|
|
grayScaleBitPlanes[i] = bitmap;
|
|||
|
|
}
|
|||
|
|
let mg, ng, bit, patternIndex, patternBitmap, x, y, patternRow, regionRow;
|
|||
|
|
for (mg = 0; mg < gridHeight; mg++) {
|
|||
|
|
for (ng = 0; ng < gridWidth; ng++) {
|
|||
|
|
bit = 0;
|
|||
|
|
patternIndex = 0;
|
|||
|
|
for (j = bitsPerValue - 1; j >= 0; j--) {
|
|||
|
|
bit ^= grayScaleBitPlanes[j][mg][ng];
|
|||
|
|
patternIndex |= bit << j;
|
|||
|
|
}
|
|||
|
|
patternBitmap = patterns[patternIndex];
|
|||
|
|
x = gridOffsetX + mg * gridVectorY + ng * gridVectorX >> 8;
|
|||
|
|
y = gridOffsetY + mg * gridVectorX - ng * gridVectorY >> 8;
|
|||
|
|
if (x >= 0 && x + patternWidth <= regionWidth && y >= 0 && y + patternHeight <= regionHeight) {
|
|||
|
|
for (i = 0; i < patternHeight; i++) {
|
|||
|
|
regionRow = regionBitmap[y + i];
|
|||
|
|
patternRow = patternBitmap[i];
|
|||
|
|
for (j = 0; j < patternWidth; j++) {
|
|||
|
|
regionRow[x + j] |= patternRow[j];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
let regionX, regionY;
|
|||
|
|
for (i = 0; i < patternHeight; i++) {
|
|||
|
|
regionY = y + i;
|
|||
|
|
if (regionY < 0 || regionY >= regionHeight) {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
regionRow = regionBitmap[regionY];
|
|||
|
|
patternRow = patternBitmap[i];
|
|||
|
|
for (j = 0; j < patternWidth; j++) {
|
|||
|
|
regionX = x + j;
|
|||
|
|
if (regionX >= 0 && regionX < regionWidth) {
|
|||
|
|
regionRow[regionX] |= patternRow[j];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return regionBitmap;
|
|||
|
|
}
|
|||
|
|
function readSegmentHeader(data, start) {
|
|||
|
|
const segmentHeader = {};
|
|||
|
|
segmentHeader.number = readUint32(data, start);
|
|||
|
|
const flags = data[start + 4];
|
|||
|
|
const segmentType = flags & 0x3f;
|
|||
|
|
if (!SegmentTypes[segmentType]) {
|
|||
|
|
throw new Jbig2Error("invalid segment type: " + segmentType);
|
|||
|
|
}
|
|||
|
|
segmentHeader.type = segmentType;
|
|||
|
|
segmentHeader.typeName = SegmentTypes[segmentType];
|
|||
|
|
segmentHeader.deferredNonRetain = !!(flags & 0x80);
|
|||
|
|
const pageAssociationFieldSize = !!(flags & 0x40);
|
|||
|
|
const referredFlags = data[start + 5];
|
|||
|
|
let referredToCount = referredFlags >> 5 & 7;
|
|||
|
|
const retainBits = [referredFlags & 31];
|
|||
|
|
let position = start + 6;
|
|||
|
|
if (referredFlags === 7) {
|
|||
|
|
referredToCount = readUint32(data, position - 1) & 0x1fffffff;
|
|||
|
|
position += 3;
|
|||
|
|
let bytes = referredToCount + 7 >> 3;
|
|||
|
|
retainBits[0] = data[position++];
|
|||
|
|
while (--bytes > 0) {
|
|||
|
|
retainBits.push(data[position++]);
|
|||
|
|
}
|
|||
|
|
} else if (referredFlags === 5 || referredFlags === 6) {
|
|||
|
|
throw new Jbig2Error("invalid referred-to flags");
|
|||
|
|
}
|
|||
|
|
segmentHeader.retainBits = retainBits;
|
|||
|
|
let referredToSegmentNumberSize = 4;
|
|||
|
|
if (segmentHeader.number <= 256) {
|
|||
|
|
referredToSegmentNumberSize = 1;
|
|||
|
|
} else if (segmentHeader.number <= 65536) {
|
|||
|
|
referredToSegmentNumberSize = 2;
|
|||
|
|
}
|
|||
|
|
const referredTo = [];
|
|||
|
|
let i, ii;
|
|||
|
|
for (i = 0; i < referredToCount; i++) {
|
|||
|
|
let number;
|
|||
|
|
if (referredToSegmentNumberSize === 1) {
|
|||
|
|
number = data[position];
|
|||
|
|
} else if (referredToSegmentNumberSize === 2) {
|
|||
|
|
number = readUint16(data, position);
|
|||
|
|
} else {
|
|||
|
|
number = readUint32(data, position);
|
|||
|
|
}
|
|||
|
|
referredTo.push(number);
|
|||
|
|
position += referredToSegmentNumberSize;
|
|||
|
|
}
|
|||
|
|
segmentHeader.referredTo = referredTo;
|
|||
|
|
if (!pageAssociationFieldSize) {
|
|||
|
|
segmentHeader.pageAssociation = data[position++];
|
|||
|
|
} else {
|
|||
|
|
segmentHeader.pageAssociation = readUint32(data, position);
|
|||
|
|
position += 4;
|
|||
|
|
}
|
|||
|
|
segmentHeader.length = readUint32(data, position);
|
|||
|
|
position += 4;
|
|||
|
|
if (segmentHeader.length === 0xffffffff) {
|
|||
|
|
if (segmentType === 38) {
|
|||
|
|
const genericRegionInfo = readRegionSegmentInformation(data, position);
|
|||
|
|
const genericRegionSegmentFlags = data[position + RegionSegmentInformationFieldLength];
|
|||
|
|
const genericRegionMmr = !!(genericRegionSegmentFlags & 1);
|
|||
|
|
const searchPatternLength = 6;
|
|||
|
|
const searchPattern = new Uint8Array(searchPatternLength);
|
|||
|
|
if (!genericRegionMmr) {
|
|||
|
|
searchPattern[0] = 0xff;
|
|||
|
|
searchPattern[1] = 0xac;
|
|||
|
|
}
|
|||
|
|
searchPattern[2] = genericRegionInfo.height >>> 24 & 0xff;
|
|||
|
|
searchPattern[3] = genericRegionInfo.height >> 16 & 0xff;
|
|||
|
|
searchPattern[4] = genericRegionInfo.height >> 8 & 0xff;
|
|||
|
|
searchPattern[5] = genericRegionInfo.height & 0xff;
|
|||
|
|
for (i = position, ii = data.length; i < ii; i++) {
|
|||
|
|
let j = 0;
|
|||
|
|
while (j < searchPatternLength && searchPattern[j] === data[i + j]) {
|
|||
|
|
j++;
|
|||
|
|
}
|
|||
|
|
if (j === searchPatternLength) {
|
|||
|
|
segmentHeader.length = i + searchPatternLength;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (segmentHeader.length === 0xffffffff) {
|
|||
|
|
throw new Jbig2Error("segment end was not found");
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
throw new Jbig2Error("invalid unknown segment length");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
segmentHeader.headerEnd = position;
|
|||
|
|
return segmentHeader;
|
|||
|
|
}
|
|||
|
|
function readSegments(header, data, start, end) {
|
|||
|
|
const segments = [];
|
|||
|
|
let position = start;
|
|||
|
|
while (position < end) {
|
|||
|
|
const segmentHeader = readSegmentHeader(data, position);
|
|||
|
|
position = segmentHeader.headerEnd;
|
|||
|
|
const segment = {
|
|||
|
|
header: segmentHeader,
|
|||
|
|
data
|
|||
|
|
};
|
|||
|
|
if (!header.randomAccess) {
|
|||
|
|
segment.start = position;
|
|||
|
|
position += segmentHeader.length;
|
|||
|
|
segment.end = position;
|
|||
|
|
}
|
|||
|
|
segments.push(segment);
|
|||
|
|
if (segmentHeader.type === 51) {
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (header.randomAccess) {
|
|||
|
|
for (let i = 0, ii = segments.length; i < ii; i++) {
|
|||
|
|
segments[i].start = position;
|
|||
|
|
position += segments[i].header.length;
|
|||
|
|
segments[i].end = position;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return segments;
|
|||
|
|
}
|
|||
|
|
function readRegionSegmentInformation(data, start) {
|
|||
|
|
return {
|
|||
|
|
width: readUint32(data, start),
|
|||
|
|
height: readUint32(data, start + 4),
|
|||
|
|
x: readUint32(data, start + 8),
|
|||
|
|
y: readUint32(data, start + 12),
|
|||
|
|
combinationOperator: data[start + 16] & 7
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
const RegionSegmentInformationFieldLength = 17;
|
|||
|
|
function processSegment(segment, visitor) {
|
|||
|
|
const header = segment.header;
|
|||
|
|
const data = segment.data,
|
|||
|
|
end = segment.end;
|
|||
|
|
let position = segment.start;
|
|||
|
|
let args, at, i, atLength;
|
|||
|
|
switch (header.type) {
|
|||
|
|
case 0:
|
|||
|
|
const dictionary = {};
|
|||
|
|
const dictionaryFlags = readUint16(data, position);
|
|||
|
|
dictionary.huffman = !!(dictionaryFlags & 1);
|
|||
|
|
dictionary.refinement = !!(dictionaryFlags & 2);
|
|||
|
|
dictionary.huffmanDHSelector = dictionaryFlags >> 2 & 3;
|
|||
|
|
dictionary.huffmanDWSelector = dictionaryFlags >> 4 & 3;
|
|||
|
|
dictionary.bitmapSizeSelector = dictionaryFlags >> 6 & 1;
|
|||
|
|
dictionary.aggregationInstancesSelector = dictionaryFlags >> 7 & 1;
|
|||
|
|
dictionary.bitmapCodingContextUsed = !!(dictionaryFlags & 256);
|
|||
|
|
dictionary.bitmapCodingContextRetained = !!(dictionaryFlags & 512);
|
|||
|
|
dictionary.template = dictionaryFlags >> 10 & 3;
|
|||
|
|
dictionary.refinementTemplate = dictionaryFlags >> 12 & 1;
|
|||
|
|
position += 2;
|
|||
|
|
if (!dictionary.huffman) {
|
|||
|
|
atLength = dictionary.template === 0 ? 4 : 1;
|
|||
|
|
at = [];
|
|||
|
|
for (i = 0; i < atLength; i++) {
|
|||
|
|
at.push({
|
|||
|
|
x: readInt8(data, position),
|
|||
|
|
y: readInt8(data, position + 1)
|
|||
|
|
});
|
|||
|
|
position += 2;
|
|||
|
|
}
|
|||
|
|
dictionary.at = at;
|
|||
|
|
}
|
|||
|
|
if (dictionary.refinement && !dictionary.refinementTemplate) {
|
|||
|
|
at = [];
|
|||
|
|
for (i = 0; i < 2; i++) {
|
|||
|
|
at.push({
|
|||
|
|
x: readInt8(data, position),
|
|||
|
|
y: readInt8(data, position + 1)
|
|||
|
|
});
|
|||
|
|
position += 2;
|
|||
|
|
}
|
|||
|
|
dictionary.refinementAt = at;
|
|||
|
|
}
|
|||
|
|
dictionary.numberOfExportedSymbols = readUint32(data, position);
|
|||
|
|
position += 4;
|
|||
|
|
dictionary.numberOfNewSymbols = readUint32(data, position);
|
|||
|
|
position += 4;
|
|||
|
|
args = [dictionary, header.number, header.referredTo, data, position, end];
|
|||
|
|
break;
|
|||
|
|
case 6:
|
|||
|
|
case 7:
|
|||
|
|
const textRegion = {};
|
|||
|
|
textRegion.info = readRegionSegmentInformation(data, position);
|
|||
|
|
position += RegionSegmentInformationFieldLength;
|
|||
|
|
const textRegionSegmentFlags = readUint16(data, position);
|
|||
|
|
position += 2;
|
|||
|
|
textRegion.huffman = !!(textRegionSegmentFlags & 1);
|
|||
|
|
textRegion.refinement = !!(textRegionSegmentFlags & 2);
|
|||
|
|
textRegion.logStripSize = textRegionSegmentFlags >> 2 & 3;
|
|||
|
|
textRegion.stripSize = 1 << textRegion.logStripSize;
|
|||
|
|
textRegion.referenceCorner = textRegionSegmentFlags >> 4 & 3;
|
|||
|
|
textRegion.transposed = !!(textRegionSegmentFlags & 64);
|
|||
|
|
textRegion.combinationOperator = textRegionSegmentFlags >> 7 & 3;
|
|||
|
|
textRegion.defaultPixelValue = textRegionSegmentFlags >> 9 & 1;
|
|||
|
|
textRegion.dsOffset = textRegionSegmentFlags << 17 >> 27;
|
|||
|
|
textRegion.refinementTemplate = textRegionSegmentFlags >> 15 & 1;
|
|||
|
|
if (textRegion.huffman) {
|
|||
|
|
const textRegionHuffmanFlags = readUint16(data, position);
|
|||
|
|
position += 2;
|
|||
|
|
textRegion.huffmanFS = textRegionHuffmanFlags & 3;
|
|||
|
|
textRegion.huffmanDS = textRegionHuffmanFlags >> 2 & 3;
|
|||
|
|
textRegion.huffmanDT = textRegionHuffmanFlags >> 4 & 3;
|
|||
|
|
textRegion.huffmanRefinementDW = textRegionHuffmanFlags >> 6 & 3;
|
|||
|
|
textRegion.huffmanRefinementDH = textRegionHuffmanFlags >> 8 & 3;
|
|||
|
|
textRegion.huffmanRefinementDX = textRegionHuffmanFlags >> 10 & 3;
|
|||
|
|
textRegion.huffmanRefinementDY = textRegionHuffmanFlags >> 12 & 3;
|
|||
|
|
textRegion.huffmanRefinementSizeSelector = !!(textRegionHuffmanFlags & 0x4000);
|
|||
|
|
}
|
|||
|
|
if (textRegion.refinement && !textRegion.refinementTemplate) {
|
|||
|
|
at = [];
|
|||
|
|
for (i = 0; i < 2; i++) {
|
|||
|
|
at.push({
|
|||
|
|
x: readInt8(data, position),
|
|||
|
|
y: readInt8(data, position + 1)
|
|||
|
|
});
|
|||
|
|
position += 2;
|
|||
|
|
}
|
|||
|
|
textRegion.refinementAt = at;
|
|||
|
|
}
|
|||
|
|
textRegion.numberOfSymbolInstances = readUint32(data, position);
|
|||
|
|
position += 4;
|
|||
|
|
args = [textRegion, header.referredTo, data, position, end];
|
|||
|
|
break;
|
|||
|
|
case 16:
|
|||
|
|
const patternDictionary = {};
|
|||
|
|
const patternDictionaryFlags = data[position++];
|
|||
|
|
patternDictionary.mmr = !!(patternDictionaryFlags & 1);
|
|||
|
|
patternDictionary.template = patternDictionaryFlags >> 1 & 3;
|
|||
|
|
patternDictionary.patternWidth = data[position++];
|
|||
|
|
patternDictionary.patternHeight = data[position++];
|
|||
|
|
patternDictionary.maxPatternIndex = readUint32(data, position);
|
|||
|
|
position += 4;
|
|||
|
|
args = [patternDictionary, header.number, data, position, end];
|
|||
|
|
break;
|
|||
|
|
case 22:
|
|||
|
|
case 23:
|
|||
|
|
const halftoneRegion = {};
|
|||
|
|
halftoneRegion.info = readRegionSegmentInformation(data, position);
|
|||
|
|
position += RegionSegmentInformationFieldLength;
|
|||
|
|
const halftoneRegionFlags = data[position++];
|
|||
|
|
halftoneRegion.mmr = !!(halftoneRegionFlags & 1);
|
|||
|
|
halftoneRegion.template = halftoneRegionFlags >> 1 & 3;
|
|||
|
|
halftoneRegion.enableSkip = !!(halftoneRegionFlags & 8);
|
|||
|
|
halftoneRegion.combinationOperator = halftoneRegionFlags >> 4 & 7;
|
|||
|
|
halftoneRegion.defaultPixelValue = halftoneRegionFlags >> 7 & 1;
|
|||
|
|
halftoneRegion.gridWidth = readUint32(data, position);
|
|||
|
|
position += 4;
|
|||
|
|
halftoneRegion.gridHeight = readUint32(data, position);
|
|||
|
|
position += 4;
|
|||
|
|
halftoneRegion.gridOffsetX = readUint32(data, position) & 0xffffffff;
|
|||
|
|
position += 4;
|
|||
|
|
halftoneRegion.gridOffsetY = readUint32(data, position) & 0xffffffff;
|
|||
|
|
position += 4;
|
|||
|
|
halftoneRegion.gridVectorX = readUint16(data, position);
|
|||
|
|
position += 2;
|
|||
|
|
halftoneRegion.gridVectorY = readUint16(data, position);
|
|||
|
|
position += 2;
|
|||
|
|
args = [halftoneRegion, header.referredTo, data, position, end];
|
|||
|
|
break;
|
|||
|
|
case 38:
|
|||
|
|
case 39:
|
|||
|
|
const genericRegion = {};
|
|||
|
|
genericRegion.info = readRegionSegmentInformation(data, position);
|
|||
|
|
position += RegionSegmentInformationFieldLength;
|
|||
|
|
const genericRegionSegmentFlags = data[position++];
|
|||
|
|
genericRegion.mmr = !!(genericRegionSegmentFlags & 1);
|
|||
|
|
genericRegion.template = genericRegionSegmentFlags >> 1 & 3;
|
|||
|
|
genericRegion.prediction = !!(genericRegionSegmentFlags & 8);
|
|||
|
|
if (!genericRegion.mmr) {
|
|||
|
|
atLength = genericRegion.template === 0 ? 4 : 1;
|
|||
|
|
at = [];
|
|||
|
|
for (i = 0; i < atLength; i++) {
|
|||
|
|
at.push({
|
|||
|
|
x: readInt8(data, position),
|
|||
|
|
y: readInt8(data, position + 1)
|
|||
|
|
});
|
|||
|
|
position += 2;
|
|||
|
|
}
|
|||
|
|
genericRegion.at = at;
|
|||
|
|
}
|
|||
|
|
args = [genericRegion, data, position, end];
|
|||
|
|
break;
|
|||
|
|
case 48:
|
|||
|
|
const pageInfo = {
|
|||
|
|
width: readUint32(data, position),
|
|||
|
|
height: readUint32(data, position + 4),
|
|||
|
|
resolutionX: readUint32(data, position + 8),
|
|||
|
|
resolutionY: readUint32(data, position + 12)
|
|||
|
|
};
|
|||
|
|
if (pageInfo.height === 0xffffffff) {
|
|||
|
|
delete pageInfo.height;
|
|||
|
|
}
|
|||
|
|
const pageSegmentFlags = data[position + 16];
|
|||
|
|
readUint16(data, position + 17);
|
|||
|
|
pageInfo.lossless = !!(pageSegmentFlags & 1);
|
|||
|
|
pageInfo.refinement = !!(pageSegmentFlags & 2);
|
|||
|
|
pageInfo.defaultPixelValue = pageSegmentFlags >> 2 & 1;
|
|||
|
|
pageInfo.combinationOperator = pageSegmentFlags >> 3 & 3;
|
|||
|
|
pageInfo.requiresBuffer = !!(pageSegmentFlags & 32);
|
|||
|
|
pageInfo.combinationOperatorOverride = !!(pageSegmentFlags & 64);
|
|||
|
|
args = [pageInfo];
|
|||
|
|
break;
|
|||
|
|
case 49:
|
|||
|
|
break;
|
|||
|
|
case 50:
|
|||
|
|
break;
|
|||
|
|
case 51:
|
|||
|
|
break;
|
|||
|
|
case 53:
|
|||
|
|
args = [header.number, data, position, end];
|
|||
|
|
break;
|
|||
|
|
case 62:
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
throw new Jbig2Error(`segment type ${header.typeName}(${header.type}) is not implemented`);
|
|||
|
|
}
|
|||
|
|
const callbackName = "on" + header.typeName;
|
|||
|
|
if (callbackName in visitor) {
|
|||
|
|
visitor[callbackName].apply(visitor, args);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function processSegments(segments, visitor) {
|
|||
|
|
for (let i = 0, ii = segments.length; i < ii; i++) {
|
|||
|
|
processSegment(segments[i], visitor);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function parseJbig2Chunks(chunks) {
|
|||
|
|
const visitor = new SimpleSegmentVisitor();
|
|||
|
|
for (let i = 0, ii = chunks.length; i < ii; i++) {
|
|||
|
|
const chunk = chunks[i];
|
|||
|
|
const segments = readSegments({}, chunk.data, chunk.start, chunk.end);
|
|||
|
|
processSegments(segments, visitor);
|
|||
|
|
}
|
|||
|
|
return visitor.buffer;
|
|||
|
|
}
|
|||
|
|
function parseJbig2(data) {
|
|||
|
|
const end = data.length;
|
|||
|
|
let position = 0;
|
|||
|
|
if (data[position] !== 0x97 || data[position + 1] !== 0x4a || data[position + 2] !== 0x42 || data[position + 3] !== 0x32 || data[position + 4] !== 0x0d || data[position + 5] !== 0x0a || data[position + 6] !== 0x1a || data[position + 7] !== 0x0a) {
|
|||
|
|
throw new Jbig2Error("parseJbig2 - invalid header.");
|
|||
|
|
}
|
|||
|
|
const header = Object.create(null);
|
|||
|
|
position += 8;
|
|||
|
|
const flags = data[position++];
|
|||
|
|
header.randomAccess = !(flags & 1);
|
|||
|
|
if (!(flags & 2)) {
|
|||
|
|
header.numberOfPages = readUint32(data, position);
|
|||
|
|
position += 4;
|
|||
|
|
}
|
|||
|
|
const segments = readSegments(header, data, position, end);
|
|||
|
|
const visitor = new SimpleSegmentVisitor();
|
|||
|
|
processSegments(segments, visitor);
|
|||
|
|
const {
|
|||
|
|
width,
|
|||
|
|
height
|
|||
|
|
} = visitor.currentPageInfo;
|
|||
|
|
const bitPacked = visitor.buffer;
|
|||
|
|
const imgData = new Uint8ClampedArray(width * height);
|
|||
|
|
let q = 0,
|
|||
|
|
k = 0;
|
|||
|
|
for (let i = 0; i < height; i++) {
|
|||
|
|
let mask = 0,
|
|||
|
|
buffer;
|
|||
|
|
for (let j = 0; j < width; j++) {
|
|||
|
|
if (!mask) {
|
|||
|
|
mask = 128;
|
|||
|
|
buffer = bitPacked[k++];
|
|||
|
|
}
|
|||
|
|
imgData[q++] = buffer & mask ? 0 : 255;
|
|||
|
|
mask >>= 1;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return {
|
|||
|
|
imgData,
|
|||
|
|
width,
|
|||
|
|
height
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
class SimpleSegmentVisitor {
|
|||
|
|
onPageInformation(info) {
|
|||
|
|
this.currentPageInfo = info;
|
|||
|
|
const rowSize = info.width + 7 >> 3;
|
|||
|
|
const buffer = new Uint8ClampedArray(rowSize * info.height);
|
|||
|
|
if (info.defaultPixelValue) {
|
|||
|
|
buffer.fill(0xff);
|
|||
|
|
}
|
|||
|
|
this.buffer = buffer;
|
|||
|
|
}
|
|||
|
|
drawBitmap(regionInfo, bitmap) {
|
|||
|
|
const pageInfo = this.currentPageInfo;
|
|||
|
|
const width = regionInfo.width,
|
|||
|
|
height = regionInfo.height;
|
|||
|
|
const rowSize = pageInfo.width + 7 >> 3;
|
|||
|
|
const combinationOperator = pageInfo.combinationOperatorOverride ? regionInfo.combinationOperator : pageInfo.combinationOperator;
|
|||
|
|
const buffer = this.buffer;
|
|||
|
|
const mask0 = 128 >> (regionInfo.x & 7);
|
|||
|
|
let offset0 = regionInfo.y * rowSize + (regionInfo.x >> 3);
|
|||
|
|
let i, j, mask, offset;
|
|||
|
|
switch (combinationOperator) {
|
|||
|
|
case 0:
|
|||
|
|
for (i = 0; i < height; i++) {
|
|||
|
|
mask = mask0;
|
|||
|
|
offset = offset0;
|
|||
|
|
for (j = 0; j < width; j++) {
|
|||
|
|
if (bitmap[i][j]) {
|
|||
|
|
buffer[offset] |= mask;
|
|||
|
|
}
|
|||
|
|
mask >>= 1;
|
|||
|
|
if (!mask) {
|
|||
|
|
mask = 128;
|
|||
|
|
offset++;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
offset0 += rowSize;
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case 2:
|
|||
|
|
for (i = 0; i < height; i++) {
|
|||
|
|
mask = mask0;
|
|||
|
|
offset = offset0;
|
|||
|
|
for (j = 0; j < width; j++) {
|
|||
|
|
if (bitmap[i][j]) {
|
|||
|
|
buffer[offset] ^= mask;
|
|||
|
|
}
|
|||
|
|
mask >>= 1;
|
|||
|
|
if (!mask) {
|
|||
|
|
mask = 128;
|
|||
|
|
offset++;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
offset0 += rowSize;
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
throw new Jbig2Error(`operator ${combinationOperator} is not supported`);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
onImmediateGenericRegion(region, data, start, end) {
|
|||
|
|
const regionInfo = region.info;
|
|||
|
|
const decodingContext = new DecodingContext(data, start, end);
|
|||
|
|
const bitmap = decodeBitmap(region.mmr, regionInfo.width, regionInfo.height, region.template, region.prediction, null, region.at, decodingContext);
|
|||
|
|
this.drawBitmap(regionInfo, bitmap);
|
|||
|
|
}
|
|||
|
|
onImmediateLosslessGenericRegion() {
|
|||
|
|
this.onImmediateGenericRegion(...arguments);
|
|||
|
|
}
|
|||
|
|
onSymbolDictionary(dictionary, currentSegment, referredSegments, data, start, end) {
|
|||
|
|
let huffmanTables, huffmanInput;
|
|||
|
|
if (dictionary.huffman) {
|
|||
|
|
huffmanTables = getSymbolDictionaryHuffmanTables(dictionary, referredSegments, this.customTables);
|
|||
|
|
huffmanInput = new Reader(data, start, end);
|
|||
|
|
}
|
|||
|
|
let symbols = this.symbols;
|
|||
|
|
if (!symbols) {
|
|||
|
|
this.symbols = symbols = {};
|
|||
|
|
}
|
|||
|
|
const inputSymbols = [];
|
|||
|
|
for (const referredSegment of referredSegments) {
|
|||
|
|
const referredSymbols = symbols[referredSegment];
|
|||
|
|
if (referredSymbols) {
|
|||
|
|
inputSymbols.push(...referredSymbols);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const decodingContext = new DecodingContext(data, start, end);
|
|||
|
|
symbols[currentSegment] = decodeSymbolDictionary(dictionary.huffman, dictionary.refinement, inputSymbols, dictionary.numberOfNewSymbols, dictionary.numberOfExportedSymbols, huffmanTables, dictionary.template, dictionary.at, dictionary.refinementTemplate, dictionary.refinementAt, decodingContext, huffmanInput);
|
|||
|
|
}
|
|||
|
|
onImmediateTextRegion(region, referredSegments, data, start, end) {
|
|||
|
|
const regionInfo = region.info;
|
|||
|
|
let huffmanTables, huffmanInput;
|
|||
|
|
const symbols = this.symbols;
|
|||
|
|
const inputSymbols = [];
|
|||
|
|
for (const referredSegment of referredSegments) {
|
|||
|
|
const referredSymbols = symbols[referredSegment];
|
|||
|
|
if (referredSymbols) {
|
|||
|
|
inputSymbols.push(...referredSymbols);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const symbolCodeLength = log2(inputSymbols.length);
|
|||
|
|
if (region.huffman) {
|
|||
|
|
huffmanInput = new Reader(data, start, end);
|
|||
|
|
huffmanTables = getTextRegionHuffmanTables(region, referredSegments, this.customTables, inputSymbols.length, huffmanInput);
|
|||
|
|
}
|
|||
|
|
const decodingContext = new DecodingContext(data, start, end);
|
|||
|
|
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);
|
|||
|
|
this.drawBitmap(regionInfo, bitmap);
|
|||
|
|
}
|
|||
|
|
onImmediateLosslessTextRegion() {
|
|||
|
|
this.onImmediateTextRegion(...arguments);
|
|||
|
|
}
|
|||
|
|
onPatternDictionary(dictionary, currentSegment, data, start, end) {
|
|||
|
|
let patterns = this.patterns;
|
|||
|
|
if (!patterns) {
|
|||
|
|
this.patterns = patterns = {};
|
|||
|
|
}
|
|||
|
|
const decodingContext = new DecodingContext(data, start, end);
|
|||
|
|
patterns[currentSegment] = decodePatternDictionary(dictionary.mmr, dictionary.patternWidth, dictionary.patternHeight, dictionary.maxPatternIndex, dictionary.template, decodingContext);
|
|||
|
|
}
|
|||
|
|
onImmediateHalftoneRegion(region, referredSegments, data, start, end) {
|
|||
|
|
const patterns = this.patterns[referredSegments[0]];
|
|||
|
|
const regionInfo = region.info;
|
|||
|
|
const decodingContext = new DecodingContext(data, start, end);
|
|||
|
|
const bitmap = decodeHalftoneRegion(region.mmr, patterns, region.template, regionInfo.width, regionInfo.height, region.defaultPixelValue, region.enableSkip, region.combinationOperator, region.gridWidth, region.gridHeight, region.gridOffsetX, region.gridOffsetY, region.gridVectorX, region.gridVectorY, decodingContext);
|
|||
|
|
this.drawBitmap(regionInfo, bitmap);
|
|||
|
|
}
|
|||
|
|
onImmediateLosslessHalftoneRegion() {
|
|||
|
|
this.onImmediateHalftoneRegion(...arguments);
|
|||
|
|
}
|
|||
|
|
onTables(currentSegment, data, start, end) {
|
|||
|
|
let customTables = this.customTables;
|
|||
|
|
if (!customTables) {
|
|||
|
|
this.customTables = customTables = {};
|
|||
|
|
}
|
|||
|
|
customTables[currentSegment] = decodeTablesSegment(data, start, end);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class HuffmanLine {
|
|||
|
|
constructor(lineData) {
|
|||
|
|
if (lineData.length === 2) {
|
|||
|
|
this.isOOB = true;
|
|||
|
|
this.rangeLow = 0;
|
|||
|
|
this.prefixLength = lineData[0];
|
|||
|
|
this.rangeLength = 0;
|
|||
|
|
this.prefixCode = lineData[1];
|
|||
|
|
this.isLowerRange = false;
|
|||
|
|
} else {
|
|||
|
|
this.isOOB = false;
|
|||
|
|
this.rangeLow = lineData[0];
|
|||
|
|
this.prefixLength = lineData[1];
|
|||
|
|
this.rangeLength = lineData[2];
|
|||
|
|
this.prefixCode = lineData[3];
|
|||
|
|
this.isLowerRange = lineData[4] === "lower";
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class HuffmanTreeNode {
|
|||
|
|
constructor(line) {
|
|||
|
|
this.children = [];
|
|||
|
|
if (line) {
|
|||
|
|
this.isLeaf = true;
|
|||
|
|
this.rangeLength = line.rangeLength;
|
|||
|
|
this.rangeLow = line.rangeLow;
|
|||
|
|
this.isLowerRange = line.isLowerRange;
|
|||
|
|
this.isOOB = line.isOOB;
|
|||
|
|
} else {
|
|||
|
|
this.isLeaf = false;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
buildTree(line, shift) {
|
|||
|
|
const bit = line.prefixCode >> shift & 1;
|
|||
|
|
if (shift <= 0) {
|
|||
|
|
this.children[bit] = new HuffmanTreeNode(line);
|
|||
|
|
} else {
|
|||
|
|
let node = this.children[bit];
|
|||
|
|
if (!node) {
|
|||
|
|
this.children[bit] = node = new HuffmanTreeNode(null);
|
|||
|
|
}
|
|||
|
|
node.buildTree(line, shift - 1);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
decodeNode(reader) {
|
|||
|
|
if (this.isLeaf) {
|
|||
|
|
if (this.isOOB) {
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
const htOffset = reader.readBits(this.rangeLength);
|
|||
|
|
return this.rangeLow + (this.isLowerRange ? -htOffset : htOffset);
|
|||
|
|
}
|
|||
|
|
const node = this.children[reader.readBit()];
|
|||
|
|
if (!node) {
|
|||
|
|
throw new Jbig2Error("invalid Huffman data");
|
|||
|
|
}
|
|||
|
|
return node.decodeNode(reader);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class HuffmanTable {
|
|||
|
|
constructor(lines, prefixCodesDone) {
|
|||
|
|
if (!prefixCodesDone) {
|
|||
|
|
this.assignPrefixCodes(lines);
|
|||
|
|
}
|
|||
|
|
this.rootNode = new HuffmanTreeNode(null);
|
|||
|
|
for (let i = 0, ii = lines.length; i < ii; i++) {
|
|||
|
|
const line = lines[i];
|
|||
|
|
if (line.prefixLength > 0) {
|
|||
|
|
this.rootNode.buildTree(line, line.prefixLength - 1);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
decode(reader) {
|
|||
|
|
return this.rootNode.decodeNode(reader);
|
|||
|
|
}
|
|||
|
|
assignPrefixCodes(lines) {
|
|||
|
|
const linesLength = lines.length;
|
|||
|
|
let prefixLengthMax = 0;
|
|||
|
|
for (let i = 0; i < linesLength; i++) {
|
|||
|
|
prefixLengthMax = Math.max(prefixLengthMax, lines[i].prefixLength);
|
|||
|
|
}
|
|||
|
|
const histogram = new Uint32Array(prefixLengthMax + 1);
|
|||
|
|
for (let i = 0; i < linesLength; i++) {
|
|||
|
|
histogram[lines[i].prefixLength]++;
|
|||
|
|
}
|
|||
|
|
let currentLength = 1,
|
|||
|
|
firstCode = 0,
|
|||
|
|
currentCode,
|
|||
|
|
currentTemp,
|
|||
|
|
line;
|
|||
|
|
histogram[0] = 0;
|
|||
|
|
while (currentLength <= prefixLengthMax) {
|
|||
|
|
firstCode = firstCode + histogram[currentLength - 1] << 1;
|
|||
|
|
currentCode = firstCode;
|
|||
|
|
currentTemp = 0;
|
|||
|
|
while (currentTemp < linesLength) {
|
|||
|
|
line = lines[currentTemp];
|
|||
|
|
if (line.prefixLength === currentLength) {
|
|||
|
|
line.prefixCode = currentCode;
|
|||
|
|
currentCode++;
|
|||
|
|
}
|
|||
|
|
currentTemp++;
|
|||
|
|
}
|
|||
|
|
currentLength++;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function decodeTablesSegment(data, start, end) {
|
|||
|
|
const flags = data[start];
|
|||
|
|
const lowestValue = readUint32(data, start + 1) & 0xffffffff;
|
|||
|
|
const highestValue = readUint32(data, start + 5) & 0xffffffff;
|
|||
|
|
const reader = new Reader(data, start + 9, end);
|
|||
|
|
const prefixSizeBits = (flags >> 1 & 7) + 1;
|
|||
|
|
const rangeSizeBits = (flags >> 4 & 7) + 1;
|
|||
|
|
const lines = [];
|
|||
|
|
let prefixLength,
|
|||
|
|
rangeLength,
|
|||
|
|
currentRangeLow = lowestValue;
|
|||
|
|
do {
|
|||
|
|
prefixLength = reader.readBits(prefixSizeBits);
|
|||
|
|
rangeLength = reader.readBits(rangeSizeBits);
|
|||
|
|
lines.push(new HuffmanLine([currentRangeLow, prefixLength, rangeLength, 0]));
|
|||
|
|
currentRangeLow += 1 << rangeLength;
|
|||
|
|
} while (currentRangeLow < highestValue);
|
|||
|
|
prefixLength = reader.readBits(prefixSizeBits);
|
|||
|
|
lines.push(new HuffmanLine([lowestValue - 1, prefixLength, 32, 0, "lower"]));
|
|||
|
|
prefixLength = reader.readBits(prefixSizeBits);
|
|||
|
|
lines.push(new HuffmanLine([highestValue, prefixLength, 32, 0]));
|
|||
|
|
if (flags & 1) {
|
|||
|
|
prefixLength = reader.readBits(prefixSizeBits);
|
|||
|
|
lines.push(new HuffmanLine([prefixLength, 0]));
|
|||
|
|
}
|
|||
|
|
return new HuffmanTable(lines, false);
|
|||
|
|
}
|
|||
|
|
const standardTablesCache = {};
|
|||
|
|
function getStandardTable(number) {
|
|||
|
|
let table = standardTablesCache[number];
|
|||
|
|
if (table) {
|
|||
|
|
return table;
|
|||
|
|
}
|
|||
|
|
let lines;
|
|||
|
|
switch (number) {
|
|||
|
|
case 1:
|
|||
|
|
lines = [[0, 1, 4, 0x0], [16, 2, 8, 0x2], [272, 3, 16, 0x6], [65808, 3, 32, 0x7]];
|
|||
|
|
break;
|
|||
|
|
case 2:
|
|||
|
|
lines = [[0, 1, 0, 0x0], [1, 2, 0, 0x2], [2, 3, 0, 0x6], [3, 4, 3, 0xe], [11, 5, 6, 0x1e], [75, 6, 32, 0x3e], [6, 0x3f]];
|
|||
|
|
break;
|
|||
|
|
case 3:
|
|||
|
|
lines = [[-256, 8, 8, 0xfe], [0, 1, 0, 0x0], [1, 2, 0, 0x2], [2, 3, 0, 0x6], [3, 4, 3, 0xe], [11, 5, 6, 0x1e], [-257, 8, 32, 0xff, "lower"], [75, 7, 32, 0x7e], [6, 0x3e]];
|
|||
|
|
break;
|
|||
|
|
case 4:
|
|||
|
|
lines = [[1, 1, 0, 0x0], [2, 2, 0, 0x2], [3, 3, 0, 0x6], [4, 4, 3, 0xe], [12, 5, 6, 0x1e], [76, 5, 32, 0x1f]];
|
|||
|
|
break;
|
|||
|
|
case 5:
|
|||
|
|
lines = [[-255, 7, 8, 0x7e], [1, 1, 0, 0x0], [2, 2, 0, 0x2], [3, 3, 0, 0x6], [4, 4, 3, 0xe], [12, 5, 6, 0x1e], [-256, 7, 32, 0x7f, "lower"], [76, 6, 32, 0x3e]];
|
|||
|
|
break;
|
|||
|
|
case 6:
|
|||
|
|
lines = [[-2048, 5, 10, 0x1c], [-1024, 4, 9, 0x8], [-512, 4, 8, 0x9], [-256, 4, 7, 0xa], [-128, 5, 6, 0x1d], [-64, 5, 5, 0x1e], [-32, 4, 5, 0xb], [0, 2, 7, 0x0], [128, 3, 7, 0x2], [256, 3, 8, 0x3], [512, 4, 9, 0xc], [1024, 4, 10, 0xd], [-2049, 6, 32, 0x3e, "lower"], [2048, 6, 32, 0x3f]];
|
|||
|
|
break;
|
|||
|
|
case 7:
|
|||
|
|
lines = [[-1024, 4, 9, 0x8], [-512, 3, 8, 0x0], [-256, 4, 7, 0x9], [-128, 5, 6, 0x1a], [-64, 5, 5, 0x1b], [-32, 4, 5, 0xa], [0, 4, 5, 0xb], [32, 5, 5, 0x1c], [64, 5, 6, 0x1d], [128, 4, 7, 0xc], [256, 3, 8, 0x1], [512, 3, 9, 0x2], [1024, 3, 10, 0x3], [-1025, 5, 32, 0x1e, "lower"], [2048, 5, 32, 0x1f]];
|
|||
|
|
break;
|
|||
|
|
case 8:
|
|||
|
|
lines = [[-15, 8, 3, 0xfc], [-7, 9, 1, 0x1fc], [-5, 8, 1, 0xfd], [-3, 9, 0, 0x1fd], [-2, 7, 0, 0x7c], [-1, 4, 0, 0xa], [0, 2, 1, 0x0], [2, 5, 0, 0x1a], [3, 6, 0, 0x3a], [4, 3, 4, 0x4], [20, 6, 1, 0x3b], [22, 4, 4, 0xb], [38, 4, 5, 0xc], [70, 5, 6, 0x1b], [134, 5, 7, 0x1c], [262, 6, 7, 0x3c], [390, 7, 8, 0x7d], [646, 6, 10, 0x3d], [-16, 9, 32, 0x1fe, "lower"], [1670, 9, 32, 0x1ff], [2, 0x1]];
|
|||
|
|
break;
|
|||
|
|
case 9:
|
|||
|
|
lines = [[-31, 8, 4, 0xfc], [-15, 9, 2, 0x1fc], [-11, 8, 2, 0xfd], [-7, 9, 1, 0x1fd], [-5, 7, 1, 0x7c], [-3, 4, 1, 0xa], [-1, 3, 1, 0x2], [1, 3, 1, 0x3], [3, 5, 1, 0x1a], [5, 6, 1, 0x3a], [7, 3, 5, 0x4], [39, 6, 2, 0x3b], [43, 4, 5, 0xb], [75, 4, 6, 0xc], [139, 5, 7, 0x1b], [267, 5, 8, 0x1c], [523, 6, 8, 0x3c], [779, 7, 9, 0x7d], [1291, 6, 11, 0x3d], [-32, 9, 32, 0x1fe, "lower"], [3339, 9, 32, 0x1ff], [2, 0x0]];
|
|||
|
|
break;
|
|||
|
|
case 10:
|
|||
|
|
lines = [[-21, 7, 4, 0x7a], [-5, 8, 0, 0xfc], [-4, 7, 0, 0x7b], [-3, 5, 0, 0x18], [-2, 2, 2, 0x0], [2, 5, 0, 0x19], [3, 6, 0, 0x36], [4, 7, 0, 0x7c], [5, 8, 0, 0xfd], [6, 2, 6, 0x1], [70, 5, 5, 0x1a], [102, 6, 5, 0x37], [134, 6, 6, 0x38], [198, 6, 7, 0x39], [326, 6, 8, 0x3a], [582, 6, 9, 0x3b], [1094, 6, 10, 0x3c], [2118, 7, 11, 0x7d], [-22, 8, 32, 0xfe, "lower"], [4166, 8, 32, 0xff], [2, 0x2]];
|
|||
|
|
break;
|
|||
|
|
case 11:
|
|||
|
|
lines = [[1, 1, 0, 0x0], [2, 2, 1, 0x2], [4, 4, 0, 0xc], [5, 4, 1, 0xd], [7, 5, 1, 0x1c], [9, 5, 2, 0x1d], [13, 6, 2, 0x3c], [17, 7, 2, 0x7a], [21, 7, 3, 0x7b], [29, 7, 4, 0x7c], [45, 7, 5, 0x7d], [77, 7, 6, 0x7e], [141, 7, 32, 0x7f]];
|
|||
|
|
break;
|
|||
|
|
case 12:
|
|||
|
|
lines = [[1, 1, 0, 0x0], [2, 2, 0, 0x2], [3, 3, 1, 0x6], [5, 5, 0, 0x1c], [6, 5, 1, 0x1d], [8, 6, 1, 0x3c], [10, 7, 0, 0x7a], [11, 7, 1, 0x7b], [13, 7, 2, 0x7c], [17, 7, 3, 0x7d], [25, 7, 4, 0x7e], [41, 8, 5, 0xfe], [73, 8, 32, 0xff]];
|
|||
|
|
break;
|
|||
|
|
case 13:
|
|||
|
|
lines = [[1, 1, 0, 0x0], [2, 3, 0, 0x4], [3, 4, 0, 0xc], [4, 5, 0, 0x1c], [5, 4, 1, 0xd], [7, 3, 3, 0x5], [15, 6, 1, 0x3a], [17, 6, 2, 0x3b], [21, 6, 3, 0x3c], [29, 6, 4, 0x3d], [45, 6, 5, 0x3e], [77, 7, 6, 0x7e], [141, 7, 32, 0x7f]];
|
|||
|
|
break;
|
|||
|
|
case 14:
|
|||
|
|
lines = [[-2, 3, 0, 0x4], [-1, 3, 0, 0x5], [0, 1, 0, 0x0], [1, 3, 0, 0x6], [2, 3, 0, 0x7]];
|
|||
|
|
break;
|
|||
|
|
case 15:
|
|||
|
|
lines = [[-24, 7, 4, 0x7c], [-8, 6, 2, 0x3c], [-4, 5, 1, 0x1c], [-2, 4, 0, 0xc], [-1, 3, 0, 0x4], [0, 1, 0, 0x0], [1, 3, 0, 0x5], [2, 4, 0, 0xd], [3, 5, 1, 0x1d], [5, 6, 2, 0x3d], [9, 7, 4, 0x7d], [-25, 7, 32, 0x7e, "lower"], [25, 7, 32, 0x7f]];
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
throw new Jbig2Error(`standard table B.${number} does not exist`);
|
|||
|
|
}
|
|||
|
|
for (let i = 0, ii = lines.length; i < ii; i++) {
|
|||
|
|
lines[i] = new HuffmanLine(lines[i]);
|
|||
|
|
}
|
|||
|
|
table = new HuffmanTable(lines, true);
|
|||
|
|
standardTablesCache[number] = table;
|
|||
|
|
return table;
|
|||
|
|
}
|
|||
|
|
class Reader {
|
|||
|
|
constructor(data, start, end) {
|
|||
|
|
this.data = data;
|
|||
|
|
this.start = start;
|
|||
|
|
this.end = end;
|
|||
|
|
this.position = start;
|
|||
|
|
this.shift = -1;
|
|||
|
|
this.currentByte = 0;
|
|||
|
|
}
|
|||
|
|
readBit() {
|
|||
|
|
if (this.shift < 0) {
|
|||
|
|
if (this.position >= this.end) {
|
|||
|
|
throw new Jbig2Error("end of data while reading bit");
|
|||
|
|
}
|
|||
|
|
this.currentByte = this.data[this.position++];
|
|||
|
|
this.shift = 7;
|
|||
|
|
}
|
|||
|
|
const bit = this.currentByte >> this.shift & 1;
|
|||
|
|
this.shift--;
|
|||
|
|
return bit;
|
|||
|
|
}
|
|||
|
|
readBits(numBits) {
|
|||
|
|
let result = 0,
|
|||
|
|
i;
|
|||
|
|
for (i = numBits - 1; i >= 0; i--) {
|
|||
|
|
result |= this.readBit() << i;
|
|||
|
|
}
|
|||
|
|
return result;
|
|||
|
|
}
|
|||
|
|
byteAlign() {
|
|||
|
|
this.shift = -1;
|
|||
|
|
}
|
|||
|
|
next() {
|
|||
|
|
if (this.position >= this.end) {
|
|||
|
|
return -1;
|
|||
|
|
}
|
|||
|
|
return this.data[this.position++];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function getCustomHuffmanTable(index, referredTo, customTables) {
|
|||
|
|
let currentIndex = 0;
|
|||
|
|
for (let i = 0, ii = referredTo.length; i < ii; i++) {
|
|||
|
|
const table = customTables[referredTo[i]];
|
|||
|
|
if (table) {
|
|||
|
|
if (index === currentIndex) {
|
|||
|
|
return table;
|
|||
|
|
}
|
|||
|
|
currentIndex++;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
throw new Jbig2Error("can't find custom Huffman table");
|
|||
|
|
}
|
|||
|
|
function getTextRegionHuffmanTables(textRegion, referredTo, customTables, numberOfSymbols, reader) {
|
|||
|
|
const codes = [];
|
|||
|
|
for (let i = 0; i <= 34; i++) {
|
|||
|
|
const codeLength = reader.readBits(4);
|
|||
|
|
codes.push(new HuffmanLine([i, codeLength, 0, 0]));
|
|||
|
|
}
|
|||
|
|
const runCodesTable = new HuffmanTable(codes, false);
|
|||
|
|
codes.length = 0;
|
|||
|
|
for (let i = 0; i < numberOfSymbols;) {
|
|||
|
|
const codeLength = runCodesTable.decode(reader);
|
|||
|
|
if (codeLength >= 32) {
|
|||
|
|
let repeatedLength, numberOfRepeats, j;
|
|||
|
|
switch (codeLength) {
|
|||
|
|
case 32:
|
|||
|
|
if (i === 0) {
|
|||
|
|
throw new Jbig2Error("no previous value in symbol ID table");
|
|||
|
|
}
|
|||
|
|
numberOfRepeats = reader.readBits(2) + 3;
|
|||
|
|
repeatedLength = codes[i - 1].prefixLength;
|
|||
|
|
break;
|
|||
|
|
case 33:
|
|||
|
|
numberOfRepeats = reader.readBits(3) + 3;
|
|||
|
|
repeatedLength = 0;
|
|||
|
|
break;
|
|||
|
|
case 34:
|
|||
|
|
numberOfRepeats = reader.readBits(7) + 11;
|
|||
|
|
repeatedLength = 0;
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
throw new Jbig2Error("invalid code length in symbol ID table");
|
|||
|
|
}
|
|||
|
|
for (j = 0; j < numberOfRepeats; j++) {
|
|||
|
|
codes.push(new HuffmanLine([i, repeatedLength, 0, 0]));
|
|||
|
|
i++;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
codes.push(new HuffmanLine([i, codeLength, 0, 0]));
|
|||
|
|
i++;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
reader.byteAlign();
|
|||
|
|
const symbolIDTable = new HuffmanTable(codes, false);
|
|||
|
|
let customIndex = 0,
|
|||
|
|
tableFirstS,
|
|||
|
|
tableDeltaS,
|
|||
|
|
tableDeltaT;
|
|||
|
|
switch (textRegion.huffmanFS) {
|
|||
|
|
case 0:
|
|||
|
|
case 1:
|
|||
|
|
tableFirstS = getStandardTable(textRegion.huffmanFS + 6);
|
|||
|
|
break;
|
|||
|
|
case 3:
|
|||
|
|
tableFirstS = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
|||
|
|
customIndex++;
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
throw new Jbig2Error("invalid Huffman FS selector");
|
|||
|
|
}
|
|||
|
|
switch (textRegion.huffmanDS) {
|
|||
|
|
case 0:
|
|||
|
|
case 1:
|
|||
|
|
case 2:
|
|||
|
|
tableDeltaS = getStandardTable(textRegion.huffmanDS + 8);
|
|||
|
|
break;
|
|||
|
|
case 3:
|
|||
|
|
tableDeltaS = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
|||
|
|
customIndex++;
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
throw new Jbig2Error("invalid Huffman DS selector");
|
|||
|
|
}
|
|||
|
|
switch (textRegion.huffmanDT) {
|
|||
|
|
case 0:
|
|||
|
|
case 1:
|
|||
|
|
case 2:
|
|||
|
|
tableDeltaT = getStandardTable(textRegion.huffmanDT + 11);
|
|||
|
|
break;
|
|||
|
|
case 3:
|
|||
|
|
tableDeltaT = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
|||
|
|
customIndex++;
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
throw new Jbig2Error("invalid Huffman DT selector");
|
|||
|
|
}
|
|||
|
|
if (textRegion.refinement) {
|
|||
|
|
throw new Jbig2Error("refinement with Huffman is not supported");
|
|||
|
|
}
|
|||
|
|
return {
|
|||
|
|
symbolIDTable,
|
|||
|
|
tableFirstS,
|
|||
|
|
tableDeltaS,
|
|||
|
|
tableDeltaT
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
function getSymbolDictionaryHuffmanTables(dictionary, referredTo, customTables) {
|
|||
|
|
let customIndex = 0,
|
|||
|
|
tableDeltaHeight,
|
|||
|
|
tableDeltaWidth;
|
|||
|
|
switch (dictionary.huffmanDHSelector) {
|
|||
|
|
case 0:
|
|||
|
|
case 1:
|
|||
|
|
tableDeltaHeight = getStandardTable(dictionary.huffmanDHSelector + 4);
|
|||
|
|
break;
|
|||
|
|
case 3:
|
|||
|
|
tableDeltaHeight = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
|||
|
|
customIndex++;
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
throw new Jbig2Error("invalid Huffman DH selector");
|
|||
|
|
}
|
|||
|
|
switch (dictionary.huffmanDWSelector) {
|
|||
|
|
case 0:
|
|||
|
|
case 1:
|
|||
|
|
tableDeltaWidth = getStandardTable(dictionary.huffmanDWSelector + 2);
|
|||
|
|
break;
|
|||
|
|
case 3:
|
|||
|
|
tableDeltaWidth = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
|||
|
|
customIndex++;
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
throw new Jbig2Error("invalid Huffman DW selector");
|
|||
|
|
}
|
|||
|
|
let tableBitmapSize, tableAggregateInstances;
|
|||
|
|
if (dictionary.bitmapSizeSelector) {
|
|||
|
|
tableBitmapSize = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
|||
|
|
customIndex++;
|
|||
|
|
} else {
|
|||
|
|
tableBitmapSize = getStandardTable(1);
|
|||
|
|
}
|
|||
|
|
if (dictionary.aggregationInstancesSelector) {
|
|||
|
|
tableAggregateInstances = getCustomHuffmanTable(customIndex, referredTo, customTables);
|
|||
|
|
} else {
|
|||
|
|
tableAggregateInstances = getStandardTable(1);
|
|||
|
|
}
|
|||
|
|
return {
|
|||
|
|
tableDeltaHeight,
|
|||
|
|
tableDeltaWidth,
|
|||
|
|
tableBitmapSize,
|
|||
|
|
tableAggregateInstances
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
function readUncompressedBitmap(reader, width, height) {
|
|||
|
|
const bitmap = [];
|
|||
|
|
for (let y = 0; y < height; y++) {
|
|||
|
|
const row = new Uint8Array(width);
|
|||
|
|
bitmap.push(row);
|
|||
|
|
for (let x = 0; x < width; x++) {
|
|||
|
|
row[x] = reader.readBit();
|
|||
|
|
}
|
|||
|
|
reader.byteAlign();
|
|||
|
|
}
|
|||
|
|
return bitmap;
|
|||
|
|
}
|
|||
|
|
function decodeMMRBitmap(input, width, height, endOfBlock) {
|
|||
|
|
const params = {
|
|||
|
|
K: -1,
|
|||
|
|
Columns: width,
|
|||
|
|
Rows: height,
|
|||
|
|
BlackIs1: true,
|
|||
|
|
EndOfBlock: endOfBlock
|
|||
|
|
};
|
|||
|
|
const decoder = new CCITTFaxDecoder(input, params);
|
|||
|
|
const bitmap = [];
|
|||
|
|
let currentByte,
|
|||
|
|
eof = false;
|
|||
|
|
for (let y = 0; y < height; y++) {
|
|||
|
|
const row = new Uint8Array(width);
|
|||
|
|
bitmap.push(row);
|
|||
|
|
let shift = -1;
|
|||
|
|
for (let x = 0; x < width; x++) {
|
|||
|
|
if (shift < 0) {
|
|||
|
|
currentByte = decoder.readNextChar();
|
|||
|
|
if (currentByte === -1) {
|
|||
|
|
currentByte = 0;
|
|||
|
|
eof = true;
|
|||
|
|
}
|
|||
|
|
shift = 7;
|
|||
|
|
}
|
|||
|
|
row[x] = currentByte >> shift & 1;
|
|||
|
|
shift--;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (endOfBlock && !eof) {
|
|||
|
|
const lookForEOFLimit = 5;
|
|||
|
|
for (let i = 0; i < lookForEOFLimit; i++) {
|
|||
|
|
if (decoder.readNextChar() === -1) {
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return bitmap;
|
|||
|
|
}
|
|||
|
|
class Jbig2Image {
|
|||
|
|
parseChunks(chunks) {
|
|||
|
|
return parseJbig2Chunks(chunks);
|
|||
|
|
}
|
|||
|
|
parse(data) {
|
|||
|
|
const {
|
|||
|
|
imgData,
|
|||
|
|
width,
|
|||
|
|
height
|
|||
|
|
} = parseJbig2(data);
|
|||
|
|
this.width = width;
|
|||
|
|
this.height = height;
|
|||
|
|
return imgData;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./src/core/colorspace.js
|
|||
|
|
|
|||
|
|
|
|||
|
|
function resizeRgbImage(src, dest, w1, h1, w2, h2, alpha01) {
|
|||
|
|
const COMPONENTS = 3;
|
|||
|
|
alpha01 = alpha01 !== 1 ? 0 : alpha01;
|
|||
|
|
const xRatio = w1 / w2;
|
|||
|
|
const yRatio = h1 / h2;
|
|||
|
|
let newIndex = 0,
|
|||
|
|
oldIndex;
|
|||
|
|
const xScaled = new Uint16Array(w2);
|
|||
|
|
const w1Scanline = w1 * COMPONENTS;
|
|||
|
|
for (let i = 0; i < w2; i++) {
|
|||
|
|
xScaled[i] = Math.floor(i * xRatio) * COMPONENTS;
|
|||
|
|
}
|
|||
|
|
for (let i = 0; i < h2; i++) {
|
|||
|
|
const py = Math.floor(i * yRatio) * w1Scanline;
|
|||
|
|
for (let j = 0; j < w2; j++) {
|
|||
|
|
oldIndex = py + xScaled[j];
|
|||
|
|
dest[newIndex++] = src[oldIndex++];
|
|||
|
|
dest[newIndex++] = src[oldIndex++];
|
|||
|
|
dest[newIndex++] = src[oldIndex++];
|
|||
|
|
newIndex += alpha01;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function resizeRgbaImage(src, dest, w1, h1, w2, h2, alpha01) {
|
|||
|
|
const xRatio = w1 / w2;
|
|||
|
|
const yRatio = h1 / h2;
|
|||
|
|
let newIndex = 0;
|
|||
|
|
const xScaled = new Uint16Array(w2);
|
|||
|
|
if (alpha01 === 1) {
|
|||
|
|
for (let i = 0; i < w2; i++) {
|
|||
|
|
xScaled[i] = Math.floor(i * xRatio);
|
|||
|
|
}
|
|||
|
|
const src32 = new Uint32Array(src.buffer);
|
|||
|
|
const dest32 = new Uint32Array(dest.buffer);
|
|||
|
|
const rgbMask = util_FeatureTest.isLittleEndian ? 0x00ffffff : 0xffffff00;
|
|||
|
|
for (let i = 0; i < h2; i++) {
|
|||
|
|
const buf = src32.subarray(Math.floor(i * yRatio) * w1);
|
|||
|
|
for (let j = 0; j < w2; j++) {
|
|||
|
|
dest32[newIndex++] |= buf[xScaled[j]] & rgbMask;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
const COMPONENTS = 4;
|
|||
|
|
const w1Scanline = w1 * COMPONENTS;
|
|||
|
|
for (let i = 0; i < w2; i++) {
|
|||
|
|
xScaled[i] = Math.floor(i * xRatio) * COMPONENTS;
|
|||
|
|
}
|
|||
|
|
for (let i = 0; i < h2; i++) {
|
|||
|
|
const buf = src.subarray(Math.floor(i * yRatio) * w1Scanline);
|
|||
|
|
for (let j = 0; j < w2; j++) {
|
|||
|
|
const oldIndex = xScaled[j];
|
|||
|
|
dest[newIndex++] = buf[oldIndex];
|
|||
|
|
dest[newIndex++] = buf[oldIndex + 1];
|
|||
|
|
dest[newIndex++] = buf[oldIndex + 2];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function copyRgbaImage(src, dest, alpha01) {
|
|||
|
|
if (alpha01 === 1) {
|
|||
|
|
const src32 = new Uint32Array(src.buffer);
|
|||
|
|
const dest32 = new Uint32Array(dest.buffer);
|
|||
|
|
const rgbMask = util_FeatureTest.isLittleEndian ? 0x00ffffff : 0xffffff00;
|
|||
|
|
for (let i = 0, ii = src32.length; i < ii; i++) {
|
|||
|
|
dest32[i] |= src32[i] & rgbMask;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
let j = 0;
|
|||
|
|
for (let i = 0, ii = src.length; i < ii; i += 4) {
|
|||
|
|
dest[j++] = src[i];
|
|||
|
|
dest[j++] = src[i + 1];
|
|||
|
|
dest[j++] = src[i + 2];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class ColorSpace {
|
|||
|
|
static #rgbBuf = new Uint8ClampedArray(3);
|
|||
|
|
constructor(name, numComps) {
|
|||
|
|
this.name = name;
|
|||
|
|
this.numComps = numComps;
|
|||
|
|
}
|
|||
|
|
getRgb(src, srcOffset, output = new Uint8ClampedArray(3)) {
|
|||
|
|
this.getRgbItem(src, srcOffset, output, 0);
|
|||
|
|
return output;
|
|||
|
|
}
|
|||
|
|
getRgbHex(src, srcOffset) {
|
|||
|
|
const buffer = this.getRgb(src, srcOffset, ColorSpace.#rgbBuf);
|
|||
|
|
return util_Util.makeHexColor(buffer[0], buffer[1], buffer[2]);
|
|||
|
|
}
|
|||
|
|
getRgbItem(src, srcOffset, dest, destOffset) {
|
|||
|
|
unreachable("Should not call ColorSpace.getRgbItem");
|
|||
|
|
}
|
|||
|
|
getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
|
|||
|
|
unreachable("Should not call ColorSpace.getRgbBuffer");
|
|||
|
|
}
|
|||
|
|
getOutputLength(inputLength, alpha01) {
|
|||
|
|
unreachable("Should not call ColorSpace.getOutputLength");
|
|||
|
|
}
|
|||
|
|
isPassthrough(bits) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
isDefaultDecode(decodeMap, bpc) {
|
|||
|
|
return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
|
|||
|
|
}
|
|||
|
|
fillRgb(dest, originalWidth, originalHeight, width, height, actualHeight, bpc, comps, alpha01) {
|
|||
|
|
const count = originalWidth * originalHeight;
|
|||
|
|
let rgbBuf = null;
|
|||
|
|
const numComponentColors = 1 << bpc;
|
|||
|
|
const needsResizing = originalHeight !== height || originalWidth !== width;
|
|||
|
|
if (this.isPassthrough(bpc)) {
|
|||
|
|
rgbBuf = comps;
|
|||
|
|
} else if (this.numComps === 1 && count > numComponentColors && this.name !== "DeviceGray" && this.name !== "DeviceRGB") {
|
|||
|
|
const allColors = bpc <= 8 ? new Uint8Array(numComponentColors) : new Uint16Array(numComponentColors);
|
|||
|
|
for (let i = 0; i < numComponentColors; i++) {
|
|||
|
|
allColors[i] = i;
|
|||
|
|
}
|
|||
|
|
const colorMap = new Uint8ClampedArray(numComponentColors * 3);
|
|||
|
|
this.getRgbBuffer(allColors, 0, numComponentColors, colorMap, 0, bpc, 0);
|
|||
|
|
if (!needsResizing) {
|
|||
|
|
let destPos = 0;
|
|||
|
|
for (let i = 0; i < count; ++i) {
|
|||
|
|
const key = comps[i] * 3;
|
|||
|
|
dest[destPos++] = colorMap[key];
|
|||
|
|
dest[destPos++] = colorMap[key + 1];
|
|||
|
|
dest[destPos++] = colorMap[key + 2];
|
|||
|
|
destPos += alpha01;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
rgbBuf = new Uint8Array(count * 3);
|
|||
|
|
let rgbPos = 0;
|
|||
|
|
for (let i = 0; i < count; ++i) {
|
|||
|
|
const key = comps[i] * 3;
|
|||
|
|
rgbBuf[rgbPos++] = colorMap[key];
|
|||
|
|
rgbBuf[rgbPos++] = colorMap[key + 1];
|
|||
|
|
rgbBuf[rgbPos++] = colorMap[key + 2];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
} else if (!needsResizing) {
|
|||
|
|
this.getRgbBuffer(comps, 0, width * actualHeight, dest, 0, bpc, alpha01);
|
|||
|
|
} else {
|
|||
|
|
rgbBuf = new Uint8ClampedArray(count * 3);
|
|||
|
|
this.getRgbBuffer(comps, 0, count, rgbBuf, 0, bpc, 0);
|
|||
|
|
}
|
|||
|
|
if (rgbBuf) {
|
|||
|
|
if (needsResizing) {
|
|||
|
|
resizeRgbImage(rgbBuf, dest, originalWidth, originalHeight, width, height, alpha01);
|
|||
|
|
} else {
|
|||
|
|
let destPos = 0,
|
|||
|
|
rgbPos = 0;
|
|||
|
|
for (let i = 0, ii = width * actualHeight; i < ii; i++) {
|
|||
|
|
dest[destPos++] = rgbBuf[rgbPos++];
|
|||
|
|
dest[destPos++] = rgbBuf[rgbPos++];
|
|||
|
|
dest[destPos++] = rgbBuf[rgbPos++];
|
|||
|
|
destPos += alpha01;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
get usesZeroToOneRange() {
|
|||
|
|
return shadow(this, "usesZeroToOneRange", true);
|
|||
|
|
}
|
|||
|
|
static isDefaultDecode(decode, numComps) {
|
|||
|
|
if (!Array.isArray(decode)) {
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
if (numComps * 2 !== decode.length) {
|
|||
|
|
util_warn("The decode map is not the correct length");
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
for (let i = 0, ii = decode.length; i < ii; i += 2) {
|
|||
|
|
if (decode[i] !== 0 || decode[i + 1] !== 1) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class AlternateCS extends ColorSpace {
|
|||
|
|
constructor(numComps, base, tintFn) {
|
|||
|
|
super("Alternate", numComps);
|
|||
|
|
this.base = base;
|
|||
|
|
this.tintFn = tintFn;
|
|||
|
|
this.tmpBuf = new Float32Array(base.numComps);
|
|||
|
|
}
|
|||
|
|
getRgbItem(src, srcOffset, dest, destOffset) {
|
|||
|
|
const tmpBuf = this.tmpBuf;
|
|||
|
|
this.tintFn(src, srcOffset, tmpBuf, 0);
|
|||
|
|
this.base.getRgbItem(tmpBuf, 0, dest, destOffset);
|
|||
|
|
}
|
|||
|
|
getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
|
|||
|
|
const tintFn = this.tintFn;
|
|||
|
|
const base = this.base;
|
|||
|
|
const scale = 1 / ((1 << bits) - 1);
|
|||
|
|
const baseNumComps = base.numComps;
|
|||
|
|
const usesZeroToOneRange = base.usesZeroToOneRange;
|
|||
|
|
const isPassthrough = (base.isPassthrough(8) || !usesZeroToOneRange) && alpha01 === 0;
|
|||
|
|
let pos = isPassthrough ? destOffset : 0;
|
|||
|
|
const baseBuf = isPassthrough ? dest : new Uint8ClampedArray(baseNumComps * count);
|
|||
|
|
const numComps = this.numComps;
|
|||
|
|
const scaled = new Float32Array(numComps);
|
|||
|
|
const tinted = new Float32Array(baseNumComps);
|
|||
|
|
let i, j;
|
|||
|
|
for (i = 0; i < count; i++) {
|
|||
|
|
for (j = 0; j < numComps; j++) {
|
|||
|
|
scaled[j] = src[srcOffset++] * scale;
|
|||
|
|
}
|
|||
|
|
tintFn(scaled, 0, tinted, 0);
|
|||
|
|
if (usesZeroToOneRange) {
|
|||
|
|
for (j = 0; j < baseNumComps; j++) {
|
|||
|
|
baseBuf[pos++] = tinted[j] * 255;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
base.getRgbItem(tinted, 0, baseBuf, pos);
|
|||
|
|
pos += baseNumComps;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (!isPassthrough) {
|
|||
|
|
base.getRgbBuffer(baseBuf, 0, count, dest, destOffset, 8, alpha01);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
getOutputLength(inputLength, alpha01) {
|
|||
|
|
return this.base.getOutputLength(inputLength * this.base.numComps / this.numComps, alpha01);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class PatternCS extends ColorSpace {
|
|||
|
|
constructor(baseCS) {
|
|||
|
|
super("Pattern", null);
|
|||
|
|
this.base = baseCS;
|
|||
|
|
}
|
|||
|
|
isDefaultDecode(decodeMap, bpc) {
|
|||
|
|
unreachable("Should not call PatternCS.isDefaultDecode");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class IndexedCS extends ColorSpace {
|
|||
|
|
constructor(base, highVal, lookup) {
|
|||
|
|
super("Indexed", 1);
|
|||
|
|
this.base = base;
|
|||
|
|
this.highVal = highVal;
|
|||
|
|
const length = base.numComps * (highVal + 1);
|
|||
|
|
this.lookup = new Uint8Array(length);
|
|||
|
|
if (lookup instanceof base_stream_BaseStream) {
|
|||
|
|
const bytes = lookup.getBytes(length);
|
|||
|
|
this.lookup.set(bytes);
|
|||
|
|
} else if (typeof lookup === "string") {
|
|||
|
|
for (let i = 0; i < length; ++i) {
|
|||
|
|
this.lookup[i] = lookup.charCodeAt(i) & 0xff;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
throw new FormatError(`IndexedCS - unrecognized lookup table: ${lookup}`);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
getRgbItem(src, srcOffset, dest, destOffset) {
|
|||
|
|
const {
|
|||
|
|
base,
|
|||
|
|
highVal,
|
|||
|
|
lookup
|
|||
|
|
} = this;
|
|||
|
|
const start = MathClamp(Math.round(src[srcOffset]), 0, highVal) * base.numComps;
|
|||
|
|
base.getRgbBuffer(lookup, start, 1, dest, destOffset, 8, 0);
|
|||
|
|
}
|
|||
|
|
getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
|
|||
|
|
const {
|
|||
|
|
base,
|
|||
|
|
highVal,
|
|||
|
|
lookup
|
|||
|
|
} = this;
|
|||
|
|
const {
|
|||
|
|
numComps
|
|||
|
|
} = base;
|
|||
|
|
const outputDelta = base.getOutputLength(numComps, alpha01);
|
|||
|
|
for (let i = 0; i < count; ++i) {
|
|||
|
|
const lookupPos = MathClamp(Math.round(src[srcOffset++]), 0, highVal) * numComps;
|
|||
|
|
base.getRgbBuffer(lookup, lookupPos, 1, dest, destOffset, 8, alpha01);
|
|||
|
|
destOffset += outputDelta;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
getOutputLength(inputLength, alpha01) {
|
|||
|
|
return this.base.getOutputLength(inputLength * this.base.numComps, alpha01);
|
|||
|
|
}
|
|||
|
|
isDefaultDecode(decodeMap, bpc) {
|
|||
|
|
if (!Array.isArray(decodeMap)) {
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
if (decodeMap.length !== 2) {
|
|||
|
|
util_warn("Decode map length is not correct");
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
if (!Number.isInteger(bpc) || bpc < 1) {
|
|||
|
|
util_warn("Bits per component is not correct");
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
return decodeMap[0] === 0 && decodeMap[1] === (1 << bpc) - 1;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class DeviceGrayCS extends ColorSpace {
|
|||
|
|
constructor() {
|
|||
|
|
super("DeviceGray", 1);
|
|||
|
|
}
|
|||
|
|
getRgbItem(src, srcOffset, dest, destOffset) {
|
|||
|
|
const c = src[srcOffset] * 255;
|
|||
|
|
dest[destOffset] = dest[destOffset + 1] = dest[destOffset + 2] = c;
|
|||
|
|
}
|
|||
|
|
getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
|
|||
|
|
const scale = 255 / ((1 << bits) - 1);
|
|||
|
|
let j = srcOffset,
|
|||
|
|
q = destOffset;
|
|||
|
|
for (let i = 0; i < count; ++i) {
|
|||
|
|
const c = scale * src[j++];
|
|||
|
|
dest[q++] = c;
|
|||
|
|
dest[q++] = c;
|
|||
|
|
dest[q++] = c;
|
|||
|
|
q += alpha01;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
getOutputLength(inputLength, alpha01) {
|
|||
|
|
return inputLength * (3 + alpha01);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class DeviceRgbCS extends ColorSpace {
|
|||
|
|
constructor() {
|
|||
|
|
super("DeviceRGB", 3);
|
|||
|
|
}
|
|||
|
|
getRgbItem(src, srcOffset, dest, destOffset) {
|
|||
|
|
dest[destOffset] = src[srcOffset] * 255;
|
|||
|
|
dest[destOffset + 1] = src[srcOffset + 1] * 255;
|
|||
|
|
dest[destOffset + 2] = src[srcOffset + 2] * 255;
|
|||
|
|
}
|
|||
|
|
getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
|
|||
|
|
if (bits === 8 && alpha01 === 0) {
|
|||
|
|
dest.set(src.subarray(srcOffset, srcOffset + count * 3), destOffset);
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
const scale = 255 / ((1 << bits) - 1);
|
|||
|
|
let j = srcOffset,
|
|||
|
|
q = destOffset;
|
|||
|
|
for (let i = 0; i < count; ++i) {
|
|||
|
|
dest[q++] = scale * src[j++];
|
|||
|
|
dest[q++] = scale * src[j++];
|
|||
|
|
dest[q++] = scale * src[j++];
|
|||
|
|
q += alpha01;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
getOutputLength(inputLength, alpha01) {
|
|||
|
|
return inputLength * (3 + alpha01) / 3 | 0;
|
|||
|
|
}
|
|||
|
|
isPassthrough(bits) {
|
|||
|
|
return bits === 8;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class DeviceRgbaCS extends ColorSpace {
|
|||
|
|
constructor() {
|
|||
|
|
super("DeviceRGBA", 4);
|
|||
|
|
}
|
|||
|
|
getOutputLength(inputLength, _alpha01) {
|
|||
|
|
return inputLength * 4;
|
|||
|
|
}
|
|||
|
|
isPassthrough(bits) {
|
|||
|
|
return bits === 8;
|
|||
|
|
}
|
|||
|
|
fillRgb(dest, originalWidth, originalHeight, width, height, actualHeight, bpc, comps, alpha01) {
|
|||
|
|
if (originalHeight !== height || originalWidth !== width) {
|
|||
|
|
resizeRgbaImage(comps, dest, originalWidth, originalHeight, width, height, alpha01);
|
|||
|
|
} else {
|
|||
|
|
copyRgbaImage(comps, dest, alpha01);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class DeviceCmykCS extends ColorSpace {
|
|||
|
|
constructor() {
|
|||
|
|
super("DeviceCMYK", 4);
|
|||
|
|
}
|
|||
|
|
#toRgb(src, srcOffset, srcScale, dest, destOffset) {
|
|||
|
|
const c = src[srcOffset] * srcScale;
|
|||
|
|
const m = src[srcOffset + 1] * srcScale;
|
|||
|
|
const y = src[srcOffset + 2] * srcScale;
|
|||
|
|
const k = src[srcOffset + 3] * srcScale;
|
|||
|
|
dest[destOffset] = 255 + c * (-4.387332384609988 * c + 54.48615194189176 * m + 18.82290502165302 * y + 212.25662451639585 * k + -285.2331026137004) + m * (1.7149763477362134 * m - 5.6096736904047315 * y + -17.873870861415444 * k - 5.497006427196366) + y * (-2.5217340131683033 * y - 21.248923337353073 * k + 17.5119270841813) + k * (-21.86122147463605 * k - 189.48180835922747);
|
|||
|
|
dest[destOffset + 1] = 255 + c * (8.841041422036149 * c + 60.118027045597366 * m + 6.871425592049007 * y + 31.159100130055922 * k + -79.2970844816548) + m * (-15.310361306967817 * m + 17.575251261109482 * y + 131.35250912493976 * k - 190.9453302588951) + y * (4.444339102852739 * y + 9.8632861493405 * k - 24.86741582555878) + k * (-20.737325471181034 * k - 187.80453709719578);
|
|||
|
|
dest[destOffset + 2] = 255 + c * (0.8842522430003296 * c + 8.078677503112928 * m + 30.89978309703729 * y - 0.23883238689178934 * k + -14.183576799673286) + m * (10.49593273432072 * m + 63.02378494754052 * y + 50.606957656360734 * k - 112.23884253719248) + y * (0.03296041114873217 * y + 115.60384449646641 * k + -193.58209356861505) + k * (-22.33816807309886 * k - 180.12613974708367);
|
|||
|
|
}
|
|||
|
|
getRgbItem(src, srcOffset, dest, destOffset) {
|
|||
|
|
this.#toRgb(src, srcOffset, 1, dest, destOffset);
|
|||
|
|
}
|
|||
|
|
getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
|
|||
|
|
const scale = 1 / ((1 << bits) - 1);
|
|||
|
|
for (let i = 0; i < count; i++) {
|
|||
|
|
this.#toRgb(src, srcOffset, scale, dest, destOffset);
|
|||
|
|
srcOffset += 4;
|
|||
|
|
destOffset += 3 + alpha01;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
getOutputLength(inputLength, alpha01) {
|
|||
|
|
return inputLength / 4 * (3 + alpha01) | 0;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class CalGrayCS extends ColorSpace {
|
|||
|
|
constructor(whitePoint, blackPoint, gamma) {
|
|||
|
|
super("CalGray", 1);
|
|||
|
|
if (!whitePoint) {
|
|||
|
|
throw new FormatError("WhitePoint missing - required for color space CalGray");
|
|||
|
|
}
|
|||
|
|
[this.XW, this.YW, this.ZW] = whitePoint;
|
|||
|
|
[this.XB, this.YB, this.ZB] = blackPoint || [0, 0, 0];
|
|||
|
|
this.G = gamma || 1;
|
|||
|
|
if (this.XW < 0 || this.ZW < 0 || this.YW !== 1) {
|
|||
|
|
throw new FormatError(`Invalid WhitePoint components for ${this.name}, no fallback available`);
|
|||
|
|
}
|
|||
|
|
if (this.XB < 0 || this.YB < 0 || this.ZB < 0) {
|
|||
|
|
info(`Invalid BlackPoint for ${this.name}, falling back to default.`);
|
|||
|
|
this.XB = this.YB = this.ZB = 0;
|
|||
|
|
}
|
|||
|
|
if (this.XB !== 0 || this.YB !== 0 || this.ZB !== 0) {
|
|||
|
|
util_warn(`${this.name}, BlackPoint: XB: ${this.XB}, YB: ${this.YB}, ` + `ZB: ${this.ZB}, only default values are supported.`);
|
|||
|
|
}
|
|||
|
|
if (this.G < 1) {
|
|||
|
|
info(`Invalid Gamma: ${this.G} for ${this.name}, falling back to default.`);
|
|||
|
|
this.G = 1;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
#toRgb(src, srcOffset, dest, destOffset, scale) {
|
|||
|
|
const A = src[srcOffset] * scale;
|
|||
|
|
const AG = A ** this.G;
|
|||
|
|
const L = this.YW * AG;
|
|||
|
|
const val = Math.max(295.8 * L ** 0.3333333333333333 - 40.8, 0);
|
|||
|
|
dest[destOffset] = val;
|
|||
|
|
dest[destOffset + 1] = val;
|
|||
|
|
dest[destOffset + 2] = val;
|
|||
|
|
}
|
|||
|
|
getRgbItem(src, srcOffset, dest, destOffset) {
|
|||
|
|
this.#toRgb(src, srcOffset, dest, destOffset, 1);
|
|||
|
|
}
|
|||
|
|
getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
|
|||
|
|
const scale = 1 / ((1 << bits) - 1);
|
|||
|
|
for (let i = 0; i < count; ++i) {
|
|||
|
|
this.#toRgb(src, srcOffset, dest, destOffset, scale);
|
|||
|
|
srcOffset += 1;
|
|||
|
|
destOffset += 3 + alpha01;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
getOutputLength(inputLength, alpha01) {
|
|||
|
|
return inputLength * (3 + alpha01);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class CalRGBCS extends ColorSpace {
|
|||
|
|
static #BRADFORD_SCALE_MATRIX = new Float32Array([0.8951, 0.2664, -0.1614, -0.7502, 1.7135, 0.0367, 0.0389, -0.0685, 1.0296]);
|
|||
|
|
static #BRADFORD_SCALE_INVERSE_MATRIX = new Float32Array([0.9869929, -0.1470543, 0.1599627, 0.4323053, 0.5183603, 0.0492912, -0.0085287, 0.0400428, 0.9684867]);
|
|||
|
|
static #SRGB_D65_XYZ_TO_RGB_MATRIX = new Float32Array([3.2404542, -1.5371385, -0.4985314, -0.9692660, 1.8760108, 0.0415560, 0.0556434, -0.2040259, 1.0572252]);
|
|||
|
|
static #FLAT_WHITEPOINT_MATRIX = new Float32Array([1, 1, 1]);
|
|||
|
|
static #tempNormalizeMatrix = new Float32Array(3);
|
|||
|
|
static #tempConvertMatrix1 = new Float32Array(3);
|
|||
|
|
static #tempConvertMatrix2 = new Float32Array(3);
|
|||
|
|
static #DECODE_L_CONSTANT = ((8 + 16) / 116) ** 3 / 8.0;
|
|||
|
|
constructor(whitePoint, blackPoint, gamma, matrix) {
|
|||
|
|
super("CalRGB", 3);
|
|||
|
|
if (!whitePoint) {
|
|||
|
|
throw new FormatError("WhitePoint missing - required for color space CalRGB");
|
|||
|
|
}
|
|||
|
|
const [XW, YW, ZW] = this.whitePoint = whitePoint;
|
|||
|
|
const [XB, YB, ZB] = this.blackPoint = blackPoint || new Float32Array(3);
|
|||
|
|
[this.GR, this.GG, this.GB] = gamma || new Float32Array([1, 1, 1]);
|
|||
|
|
[this.MXA, this.MYA, this.MZA, this.MXB, this.MYB, this.MZB, this.MXC, this.MYC, this.MZC] = matrix || new Float32Array([1, 0, 0, 0, 1, 0, 0, 0, 1]);
|
|||
|
|
if (XW < 0 || ZW < 0 || YW !== 1) {
|
|||
|
|
throw new FormatError(`Invalid WhitePoint components for ${this.name}, no fallback available`);
|
|||
|
|
}
|
|||
|
|
if (XB < 0 || YB < 0 || ZB < 0) {
|
|||
|
|
info(`Invalid BlackPoint for ${this.name} [${XB}, ${YB}, ${ZB}], ` + "falling back to default.");
|
|||
|
|
this.blackPoint = new Float32Array(3);
|
|||
|
|
}
|
|||
|
|
if (this.GR < 0 || this.GG < 0 || this.GB < 0) {
|
|||
|
|
info(`Invalid Gamma [${this.GR}, ${this.GG}, ${this.GB}] for ` + `${this.name}, falling back to default.`);
|
|||
|
|
this.GR = this.GG = this.GB = 1;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
#matrixProduct(a, b, result) {
|
|||
|
|
result[0] = a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
|
|||
|
|
result[1] = a[3] * b[0] + a[4] * b[1] + a[5] * b[2];
|
|||
|
|
result[2] = a[6] * b[0] + a[7] * b[1] + a[8] * b[2];
|
|||
|
|
}
|
|||
|
|
#toFlat(sourceWhitePoint, LMS, result) {
|
|||
|
|
result[0] = LMS[0] * 1 / sourceWhitePoint[0];
|
|||
|
|
result[1] = LMS[1] * 1 / sourceWhitePoint[1];
|
|||
|
|
result[2] = LMS[2] * 1 / sourceWhitePoint[2];
|
|||
|
|
}
|
|||
|
|
#toD65(sourceWhitePoint, LMS, result) {
|
|||
|
|
const D65X = 0.95047;
|
|||
|
|
const D65Y = 1;
|
|||
|
|
const D65Z = 1.08883;
|
|||
|
|
result[0] = LMS[0] * D65X / sourceWhitePoint[0];
|
|||
|
|
result[1] = LMS[1] * D65Y / sourceWhitePoint[1];
|
|||
|
|
result[2] = LMS[2] * D65Z / sourceWhitePoint[2];
|
|||
|
|
}
|
|||
|
|
#sRGBTransferFunction(color) {
|
|||
|
|
if (color <= 0.0031308) {
|
|||
|
|
return MathClamp(12.92 * color, 0, 1);
|
|||
|
|
}
|
|||
|
|
if (color >= 0.99554525) {
|
|||
|
|
return 1;
|
|||
|
|
}
|
|||
|
|
return MathClamp((1 + 0.055) * color ** (1 / 2.4) - 0.055, 0, 1);
|
|||
|
|
}
|
|||
|
|
#decodeL(L) {
|
|||
|
|
if (L < 0) {
|
|||
|
|
return -this.#decodeL(-L);
|
|||
|
|
}
|
|||
|
|
if (L > 8.0) {
|
|||
|
|
return ((L + 16) / 116) ** 3;
|
|||
|
|
}
|
|||
|
|
return L * CalRGBCS.#DECODE_L_CONSTANT;
|
|||
|
|
}
|
|||
|
|
#compensateBlackPoint(sourceBlackPoint, XYZ_Flat, result) {
|
|||
|
|
if (sourceBlackPoint[0] === 0 && sourceBlackPoint[1] === 0 && sourceBlackPoint[2] === 0) {
|
|||
|
|
result[0] = XYZ_Flat[0];
|
|||
|
|
result[1] = XYZ_Flat[1];
|
|||
|
|
result[2] = XYZ_Flat[2];
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
const zeroDecodeL = this.#decodeL(0);
|
|||
|
|
const X_DST = zeroDecodeL;
|
|||
|
|
const X_SRC = this.#decodeL(sourceBlackPoint[0]);
|
|||
|
|
const Y_DST = zeroDecodeL;
|
|||
|
|
const Y_SRC = this.#decodeL(sourceBlackPoint[1]);
|
|||
|
|
const Z_DST = zeroDecodeL;
|
|||
|
|
const Z_SRC = this.#decodeL(sourceBlackPoint[2]);
|
|||
|
|
const X_Scale = (1 - X_DST) / (1 - X_SRC);
|
|||
|
|
const X_Offset = 1 - X_Scale;
|
|||
|
|
const Y_Scale = (1 - Y_DST) / (1 - Y_SRC);
|
|||
|
|
const Y_Offset = 1 - Y_Scale;
|
|||
|
|
const Z_Scale = (1 - Z_DST) / (1 - Z_SRC);
|
|||
|
|
const Z_Offset = 1 - Z_Scale;
|
|||
|
|
result[0] = XYZ_Flat[0] * X_Scale + X_Offset;
|
|||
|
|
result[1] = XYZ_Flat[1] * Y_Scale + Y_Offset;
|
|||
|
|
result[2] = XYZ_Flat[2] * Z_Scale + Z_Offset;
|
|||
|
|
}
|
|||
|
|
#normalizeWhitePointToFlat(sourceWhitePoint, XYZ_In, result) {
|
|||
|
|
if (sourceWhitePoint[0] === 1 && sourceWhitePoint[2] === 1) {
|
|||
|
|
result[0] = XYZ_In[0];
|
|||
|
|
result[1] = XYZ_In[1];
|
|||
|
|
result[2] = XYZ_In[2];
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
const LMS = result;
|
|||
|
|
this.#matrixProduct(CalRGBCS.#BRADFORD_SCALE_MATRIX, XYZ_In, LMS);
|
|||
|
|
const LMS_Flat = CalRGBCS.#tempNormalizeMatrix;
|
|||
|
|
this.#toFlat(sourceWhitePoint, LMS, LMS_Flat);
|
|||
|
|
this.#matrixProduct(CalRGBCS.#BRADFORD_SCALE_INVERSE_MATRIX, LMS_Flat, result);
|
|||
|
|
}
|
|||
|
|
#normalizeWhitePointToD65(sourceWhitePoint, XYZ_In, result) {
|
|||
|
|
const LMS = result;
|
|||
|
|
this.#matrixProduct(CalRGBCS.#BRADFORD_SCALE_MATRIX, XYZ_In, LMS);
|
|||
|
|
const LMS_D65 = CalRGBCS.#tempNormalizeMatrix;
|
|||
|
|
this.#toD65(sourceWhitePoint, LMS, LMS_D65);
|
|||
|
|
this.#matrixProduct(CalRGBCS.#BRADFORD_SCALE_INVERSE_MATRIX, LMS_D65, result);
|
|||
|
|
}
|
|||
|
|
#toRgb(src, srcOffset, dest, destOffset, scale) {
|
|||
|
|
const A = MathClamp(src[srcOffset] * scale, 0, 1);
|
|||
|
|
const B = MathClamp(src[srcOffset + 1] * scale, 0, 1);
|
|||
|
|
const C = MathClamp(src[srcOffset + 2] * scale, 0, 1);
|
|||
|
|
const AGR = A === 1 ? 1 : A ** this.GR;
|
|||
|
|
const BGG = B === 1 ? 1 : B ** this.GG;
|
|||
|
|
const CGB = C === 1 ? 1 : C ** this.GB;
|
|||
|
|
const X = this.MXA * AGR + this.MXB * BGG + this.MXC * CGB;
|
|||
|
|
const Y = this.MYA * AGR + this.MYB * BGG + this.MYC * CGB;
|
|||
|
|
const Z = this.MZA * AGR + this.MZB * BGG + this.MZC * CGB;
|
|||
|
|
const XYZ = CalRGBCS.#tempConvertMatrix1;
|
|||
|
|
XYZ[0] = X;
|
|||
|
|
XYZ[1] = Y;
|
|||
|
|
XYZ[2] = Z;
|
|||
|
|
const XYZ_Flat = CalRGBCS.#tempConvertMatrix2;
|
|||
|
|
this.#normalizeWhitePointToFlat(this.whitePoint, XYZ, XYZ_Flat);
|
|||
|
|
const XYZ_Black = CalRGBCS.#tempConvertMatrix1;
|
|||
|
|
this.#compensateBlackPoint(this.blackPoint, XYZ_Flat, XYZ_Black);
|
|||
|
|
const XYZ_D65 = CalRGBCS.#tempConvertMatrix2;
|
|||
|
|
this.#normalizeWhitePointToD65(CalRGBCS.#FLAT_WHITEPOINT_MATRIX, XYZ_Black, XYZ_D65);
|
|||
|
|
const SRGB = CalRGBCS.#tempConvertMatrix1;
|
|||
|
|
this.#matrixProduct(CalRGBCS.#SRGB_D65_XYZ_TO_RGB_MATRIX, XYZ_D65, SRGB);
|
|||
|
|
dest[destOffset] = this.#sRGBTransferFunction(SRGB[0]) * 255;
|
|||
|
|
dest[destOffset + 1] = this.#sRGBTransferFunction(SRGB[1]) * 255;
|
|||
|
|
dest[destOffset + 2] = this.#sRGBTransferFunction(SRGB[2]) * 255;
|
|||
|
|
}
|
|||
|
|
getRgbItem(src, srcOffset, dest, destOffset) {
|
|||
|
|
this.#toRgb(src, srcOffset, dest, destOffset, 1);
|
|||
|
|
}
|
|||
|
|
getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
|
|||
|
|
const scale = 1 / ((1 << bits) - 1);
|
|||
|
|
for (let i = 0; i < count; ++i) {
|
|||
|
|
this.#toRgb(src, srcOffset, dest, destOffset, scale);
|
|||
|
|
srcOffset += 3;
|
|||
|
|
destOffset += 3 + alpha01;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
getOutputLength(inputLength, alpha01) {
|
|||
|
|
return inputLength * (3 + alpha01) / 3 | 0;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class LabCS extends ColorSpace {
|
|||
|
|
constructor(whitePoint, blackPoint, range) {
|
|||
|
|
super("Lab", 3);
|
|||
|
|
if (!whitePoint) {
|
|||
|
|
throw new FormatError("WhitePoint missing - required for color space Lab");
|
|||
|
|
}
|
|||
|
|
[this.XW, this.YW, this.ZW] = whitePoint;
|
|||
|
|
[this.amin, this.amax, this.bmin, this.bmax] = range || [-100, 100, -100, 100];
|
|||
|
|
[this.XB, this.YB, this.ZB] = blackPoint || [0, 0, 0];
|
|||
|
|
if (this.XW < 0 || this.ZW < 0 || this.YW !== 1) {
|
|||
|
|
throw new FormatError("Invalid WhitePoint components, no fallback available");
|
|||
|
|
}
|
|||
|
|
if (this.XB < 0 || this.YB < 0 || this.ZB < 0) {
|
|||
|
|
info("Invalid BlackPoint, falling back to default");
|
|||
|
|
this.XB = this.YB = this.ZB = 0;
|
|||
|
|
}
|
|||
|
|
if (this.amin > this.amax || this.bmin > this.bmax) {
|
|||
|
|
info("Invalid Range, falling back to defaults");
|
|||
|
|
this.amin = -100;
|
|||
|
|
this.amax = 100;
|
|||
|
|
this.bmin = -100;
|
|||
|
|
this.bmax = 100;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
#fn_g(x) {
|
|||
|
|
return x >= 6 / 29 ? x ** 3 : 108 / 841 * (x - 4 / 29);
|
|||
|
|
}
|
|||
|
|
#decode(value, high1, low2, high2) {
|
|||
|
|
return low2 + value * (high2 - low2) / high1;
|
|||
|
|
}
|
|||
|
|
#toRgb(src, srcOffset, maxVal, dest, destOffset) {
|
|||
|
|
let Ls = src[srcOffset];
|
|||
|
|
let as = src[srcOffset + 1];
|
|||
|
|
let bs = src[srcOffset + 2];
|
|||
|
|
if (maxVal !== false) {
|
|||
|
|
Ls = this.#decode(Ls, maxVal, 0, 100);
|
|||
|
|
as = this.#decode(as, maxVal, this.amin, this.amax);
|
|||
|
|
bs = this.#decode(bs, maxVal, this.bmin, this.bmax);
|
|||
|
|
}
|
|||
|
|
if (as > this.amax) {
|
|||
|
|
as = this.amax;
|
|||
|
|
} else if (as < this.amin) {
|
|||
|
|
as = this.amin;
|
|||
|
|
}
|
|||
|
|
if (bs > this.bmax) {
|
|||
|
|
bs = this.bmax;
|
|||
|
|
} else if (bs < this.bmin) {
|
|||
|
|
bs = this.bmin;
|
|||
|
|
}
|
|||
|
|
const M = (Ls + 16) / 116;
|
|||
|
|
const L = M + as / 500;
|
|||
|
|
const N = M - bs / 200;
|
|||
|
|
const X = this.XW * this.#fn_g(L);
|
|||
|
|
const Y = this.YW * this.#fn_g(M);
|
|||
|
|
const Z = this.ZW * this.#fn_g(N);
|
|||
|
|
let r, g, b;
|
|||
|
|
if (this.ZW < 1) {
|
|||
|
|
r = X * 3.1339 + Y * -1.617 + Z * -0.4906;
|
|||
|
|
g = X * -0.9785 + Y * 1.916 + Z * 0.0333;
|
|||
|
|
b = X * 0.072 + Y * -0.229 + Z * 1.4057;
|
|||
|
|
} else {
|
|||
|
|
r = X * 3.2406 + Y * -1.5372 + Z * -0.4986;
|
|||
|
|
g = X * -0.9689 + Y * 1.8758 + Z * 0.0415;
|
|||
|
|
b = X * 0.0557 + Y * -0.204 + Z * 1.057;
|
|||
|
|
}
|
|||
|
|
dest[destOffset] = Math.sqrt(r) * 255;
|
|||
|
|
dest[destOffset + 1] = Math.sqrt(g) * 255;
|
|||
|
|
dest[destOffset + 2] = Math.sqrt(b) * 255;
|
|||
|
|
}
|
|||
|
|
getRgbItem(src, srcOffset, dest, destOffset) {
|
|||
|
|
this.#toRgb(src, srcOffset, false, dest, destOffset);
|
|||
|
|
}
|
|||
|
|
getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
|
|||
|
|
const maxVal = (1 << bits) - 1;
|
|||
|
|
for (let i = 0; i < count; i++) {
|
|||
|
|
this.#toRgb(src, srcOffset, maxVal, dest, destOffset);
|
|||
|
|
srcOffset += 3;
|
|||
|
|
destOffset += 3 + alpha01;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
getOutputLength(inputLength, alpha01) {
|
|||
|
|
return inputLength * (3 + alpha01) / 3 | 0;
|
|||
|
|
}
|
|||
|
|
isDefaultDecode(decodeMap, bpc) {
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
get usesZeroToOneRange() {
|
|||
|
|
return shadow(this, "usesZeroToOneRange", false);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./external/qcms/qcms_utils.js
|
|||
|
|
class QCMS {
|
|||
|
|
static #memoryArray = null;
|
|||
|
|
static _memory = null;
|
|||
|
|
static _mustAddAlpha = false;
|
|||
|
|
static _destBuffer = null;
|
|||
|
|
static _destOffset = 0;
|
|||
|
|
static _destLength = 0;
|
|||
|
|
static _cssColor = "";
|
|||
|
|
static _makeHexColor = null;
|
|||
|
|
static get _memoryArray() {
|
|||
|
|
const array = this.#memoryArray;
|
|||
|
|
if (array?.byteLength) {
|
|||
|
|
return array;
|
|||
|
|
}
|
|||
|
|
return this.#memoryArray = new Uint8Array(this._memory.buffer);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function copy_result(ptr, len) {
|
|||
|
|
const {
|
|||
|
|
_mustAddAlpha,
|
|||
|
|
_destBuffer,
|
|||
|
|
_destOffset,
|
|||
|
|
_destLength,
|
|||
|
|
_memoryArray
|
|||
|
|
} = QCMS;
|
|||
|
|
if (len === _destLength) {
|
|||
|
|
_destBuffer.set(_memoryArray.subarray(ptr, ptr + len), _destOffset);
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
if (_mustAddAlpha) {
|
|||
|
|
for (let i = ptr, ii = ptr + len, j = _destOffset; i < ii; i += 3, j += 4) {
|
|||
|
|
_destBuffer[j] = _memoryArray[i];
|
|||
|
|
_destBuffer[j + 1] = _memoryArray[i + 1];
|
|||
|
|
_destBuffer[j + 2] = _memoryArray[i + 2];
|
|||
|
|
_destBuffer[j + 3] = 255;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
for (let i = ptr, ii = ptr + len, j = _destOffset; i < ii; i += 3, j += 4) {
|
|||
|
|
_destBuffer[j] = _memoryArray[i];
|
|||
|
|
_destBuffer[j + 1] = _memoryArray[i + 1];
|
|||
|
|
_destBuffer[j + 2] = _memoryArray[i + 2];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function copy_rgb(ptr) {
|
|||
|
|
const {
|
|||
|
|
_destBuffer,
|
|||
|
|
_destOffset,
|
|||
|
|
_memoryArray
|
|||
|
|
} = QCMS;
|
|||
|
|
_destBuffer[_destOffset] = _memoryArray[ptr];
|
|||
|
|
_destBuffer[_destOffset + 1] = _memoryArray[ptr + 1];
|
|||
|
|
_destBuffer[_destOffset + 2] = _memoryArray[ptr + 2];
|
|||
|
|
}
|
|||
|
|
function make_cssRGB(ptr) {
|
|||
|
|
const {
|
|||
|
|
_memoryArray
|
|||
|
|
} = QCMS;
|
|||
|
|
QCMS._cssColor = QCMS._makeHexColor(_memoryArray[ptr], _memoryArray[ptr + 1], _memoryArray[ptr + 2]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./external/qcms/qcms.js
|
|||
|
|
|
|||
|
|
let wasm;
|
|||
|
|
const cachedTextDecoder = typeof TextDecoder !== 'undefined' ? new TextDecoder('utf-8', {
|
|||
|
|
ignoreBOM: true,
|
|||
|
|
fatal: true
|
|||
|
|
}) : {
|
|||
|
|
decode: () => {
|
|||
|
|
throw Error('TextDecoder not available');
|
|||
|
|
}
|
|||
|
|
};
|
|||
|
|
if (typeof TextDecoder !== 'undefined') {
|
|||
|
|
cachedTextDecoder.decode();
|
|||
|
|
}
|
|||
|
|
;
|
|||
|
|
let cachedUint8ArrayMemory0 = null;
|
|||
|
|
function getUint8ArrayMemory0() {
|
|||
|
|
if (cachedUint8ArrayMemory0 === null || cachedUint8ArrayMemory0.byteLength === 0) {
|
|||
|
|
cachedUint8ArrayMemory0 = new Uint8Array(wasm.memory.buffer);
|
|||
|
|
}
|
|||
|
|
return cachedUint8ArrayMemory0;
|
|||
|
|
}
|
|||
|
|
function getStringFromWasm0(ptr, len) {
|
|||
|
|
ptr = ptr >>> 0;
|
|||
|
|
return cachedTextDecoder.decode(getUint8ArrayMemory0().subarray(ptr, ptr + len));
|
|||
|
|
}
|
|||
|
|
let WASM_VECTOR_LEN = 0;
|
|||
|
|
function passArray8ToWasm0(arg, malloc) {
|
|||
|
|
const ptr = malloc(arg.length * 1, 1) >>> 0;
|
|||
|
|
getUint8ArrayMemory0().set(arg, ptr / 1);
|
|||
|
|
WASM_VECTOR_LEN = arg.length;
|
|||
|
|
return ptr;
|
|||
|
|
}
|
|||
|
|
function qcms_convert_array(transformer, src) {
|
|||
|
|
const ptr0 = passArray8ToWasm0(src, wasm.__wbindgen_malloc);
|
|||
|
|
const len0 = WASM_VECTOR_LEN;
|
|||
|
|
wasm.qcms_convert_array(transformer, ptr0, len0);
|
|||
|
|
}
|
|||
|
|
function qcms_convert_one(transformer, src, css) {
|
|||
|
|
wasm.qcms_convert_one(transformer, src, css);
|
|||
|
|
}
|
|||
|
|
function qcms_convert_three(transformer, src1, src2, src3, css) {
|
|||
|
|
wasm.qcms_convert_three(transformer, src1, src2, src3, css);
|
|||
|
|
}
|
|||
|
|
function qcms_convert_four(transformer, src1, src2, src3, src4, css) {
|
|||
|
|
wasm.qcms_convert_four(transformer, src1, src2, src3, src4, css);
|
|||
|
|
}
|
|||
|
|
function qcms_transformer_from_memory(mem, in_type, intent) {
|
|||
|
|
const ptr0 = passArray8ToWasm0(mem, wasm.__wbindgen_malloc);
|
|||
|
|
const len0 = WASM_VECTOR_LEN;
|
|||
|
|
const ret = wasm.qcms_transformer_from_memory(ptr0, len0, in_type, intent);
|
|||
|
|
return ret >>> 0;
|
|||
|
|
}
|
|||
|
|
function qcms_drop_transformer(transformer) {
|
|||
|
|
wasm.qcms_drop_transformer(transformer);
|
|||
|
|
}
|
|||
|
|
const DataType = Object.freeze({
|
|||
|
|
RGB8: 0,
|
|||
|
|
"0": "RGB8",
|
|||
|
|
RGBA8: 1,
|
|||
|
|
"1": "RGBA8",
|
|||
|
|
BGRA8: 2,
|
|||
|
|
"2": "BGRA8",
|
|||
|
|
Gray8: 3,
|
|||
|
|
"3": "Gray8",
|
|||
|
|
GrayA8: 4,
|
|||
|
|
"4": "GrayA8",
|
|||
|
|
CMYK: 5,
|
|||
|
|
"5": "CMYK"
|
|||
|
|
});
|
|||
|
|
const Intent = Object.freeze({
|
|||
|
|
Perceptual: 0,
|
|||
|
|
"0": "Perceptual",
|
|||
|
|
RelativeColorimetric: 1,
|
|||
|
|
"1": "RelativeColorimetric",
|
|||
|
|
Saturation: 2,
|
|||
|
|
"2": "Saturation",
|
|||
|
|
AbsoluteColorimetric: 3,
|
|||
|
|
"3": "AbsoluteColorimetric"
|
|||
|
|
});
|
|||
|
|
async function __wbg_load(module, imports) {
|
|||
|
|
if (typeof Response === 'function' && module instanceof Response) {
|
|||
|
|
if (typeof WebAssembly.instantiateStreaming === 'function') {
|
|||
|
|
try {
|
|||
|
|
return await WebAssembly.instantiateStreaming(module, imports);
|
|||
|
|
} catch (e) {
|
|||
|
|
if (module.headers.get('Content-Type') != 'application/wasm') {
|
|||
|
|
console.warn("`WebAssembly.instantiateStreaming` failed because your server does not serve Wasm with `application/wasm` MIME type. Falling back to `WebAssembly.instantiate` which is slower. Original error:\n", e);
|
|||
|
|
} else {
|
|||
|
|
throw e;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const bytes = await module.arrayBuffer();
|
|||
|
|
return await WebAssembly.instantiate(bytes, imports);
|
|||
|
|
} else {
|
|||
|
|
const instance = await WebAssembly.instantiate(module, imports);
|
|||
|
|
if (instance instanceof WebAssembly.Instance) {
|
|||
|
|
return {
|
|||
|
|
instance,
|
|||
|
|
module
|
|||
|
|
};
|
|||
|
|
} else {
|
|||
|
|
return instance;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function __wbg_get_imports() {
|
|||
|
|
const imports = {};
|
|||
|
|
imports.wbg = {};
|
|||
|
|
imports.wbg.__wbg_copyresult_b08ee7d273f295dd = function (arg0, arg1) {
|
|||
|
|
copy_result(arg0 >>> 0, arg1 >>> 0);
|
|||
|
|
};
|
|||
|
|
imports.wbg.__wbg_copyrgb_d60ce17bb05d9b67 = function (arg0) {
|
|||
|
|
copy_rgb(arg0 >>> 0);
|
|||
|
|
};
|
|||
|
|
imports.wbg.__wbg_makecssRGB_893bf0cd9fdb302d = function (arg0) {
|
|||
|
|
make_cssRGB(arg0 >>> 0);
|
|||
|
|
};
|
|||
|
|
imports.wbg.__wbindgen_init_externref_table = function () {
|
|||
|
|
const table = wasm.__wbindgen_export_0;
|
|||
|
|
const offset = table.grow(4);
|
|||
|
|
table.set(0, undefined);
|
|||
|
|
table.set(offset + 0, undefined);
|
|||
|
|
table.set(offset + 1, null);
|
|||
|
|
table.set(offset + 2, true);
|
|||
|
|
table.set(offset + 3, false);
|
|||
|
|
};
|
|||
|
|
imports.wbg.__wbindgen_throw = function (arg0, arg1) {
|
|||
|
|
throw new Error(getStringFromWasm0(arg0, arg1));
|
|||
|
|
};
|
|||
|
|
return imports;
|
|||
|
|
}
|
|||
|
|
function __wbg_init_memory(imports, memory) {}
|
|||
|
|
function __wbg_finalize_init(instance, module) {
|
|||
|
|
wasm = instance.exports;
|
|||
|
|
__wbg_init.__wbindgen_wasm_module = module;
|
|||
|
|
cachedUint8ArrayMemory0 = null;
|
|||
|
|
wasm.__wbindgen_start();
|
|||
|
|
return wasm;
|
|||
|
|
}
|
|||
|
|
function initSync(module) {
|
|||
|
|
if (wasm !== undefined) return wasm;
|
|||
|
|
if (typeof module !== 'undefined') {
|
|||
|
|
if (Object.getPrototypeOf(module) === Object.prototype) {
|
|||
|
|
({
|
|||
|
|
module
|
|||
|
|
} = module);
|
|||
|
|
} else {
|
|||
|
|
console.warn('using deprecated parameters for `initSync()`; pass a single object instead');
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const imports = __wbg_get_imports();
|
|||
|
|
__wbg_init_memory(imports);
|
|||
|
|
if (!(module instanceof WebAssembly.Module)) {
|
|||
|
|
module = new WebAssembly.Module(module);
|
|||
|
|
}
|
|||
|
|
const instance = new WebAssembly.Instance(module, imports);
|
|||
|
|
return __wbg_finalize_init(instance, module);
|
|||
|
|
}
|
|||
|
|
async function __wbg_init(module_or_path) {
|
|||
|
|
if (wasm !== undefined) return wasm;
|
|||
|
|
if (typeof module_or_path !== 'undefined') {
|
|||
|
|
if (Object.getPrototypeOf(module_or_path) === Object.prototype) {
|
|||
|
|
({
|
|||
|
|
module_or_path
|
|||
|
|
} = module_or_path);
|
|||
|
|
} else {
|
|||
|
|
console.warn('using deprecated parameters for the initialization function; pass a single object instead');
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const imports = __wbg_get_imports();
|
|||
|
|
if (typeof module_or_path === 'string' || typeof Request === 'function' && module_or_path instanceof Request || typeof URL === 'function' && module_or_path instanceof URL) {
|
|||
|
|
module_or_path = fetch(module_or_path);
|
|||
|
|
}
|
|||
|
|
__wbg_init_memory(imports);
|
|||
|
|
const {
|
|||
|
|
instance,
|
|||
|
|
module
|
|||
|
|
} = await __wbg_load(await module_or_path, imports);
|
|||
|
|
return __wbg_finalize_init(instance, module);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* harmony default export */ const qcms = ((/* unused pure expression or super */ null && (__wbg_init)));
|
|||
|
|
;// ./src/core/icc_colorspace.js
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function fetchSync(url) {
|
|||
|
|
const xhr = new XMLHttpRequest();
|
|||
|
|
xhr.open("GET", url, false);
|
|||
|
|
xhr.responseType = "arraybuffer";
|
|||
|
|
xhr.send(null);
|
|||
|
|
return xhr.response;
|
|||
|
|
}
|
|||
|
|
class IccColorSpace extends ColorSpace {
|
|||
|
|
#transformer;
|
|||
|
|
#convertPixel;
|
|||
|
|
static #useWasm = true;
|
|||
|
|
static #wasmUrl = null;
|
|||
|
|
static #finalizer = null;
|
|||
|
|
constructor(iccProfile, name, numComps) {
|
|||
|
|
if (!IccColorSpace.isUsable) {
|
|||
|
|
throw new Error("No ICC color space support");
|
|||
|
|
}
|
|||
|
|
super(name, numComps);
|
|||
|
|
let inType;
|
|||
|
|
switch (numComps) {
|
|||
|
|
case 1:
|
|||
|
|
inType = DataType.Gray8;
|
|||
|
|
this.#convertPixel = (src, srcOffset, css) => qcms_convert_one(this.#transformer, src[srcOffset] * 255, css);
|
|||
|
|
break;
|
|||
|
|
case 3:
|
|||
|
|
inType = DataType.RGB8;
|
|||
|
|
this.#convertPixel = (src, srcOffset, css) => qcms_convert_three(this.#transformer, src[srcOffset] * 255, src[srcOffset + 1] * 255, src[srcOffset + 2] * 255, css);
|
|||
|
|
break;
|
|||
|
|
case 4:
|
|||
|
|
inType = DataType.CMYK;
|
|||
|
|
this.#convertPixel = (src, srcOffset, css) => qcms_convert_four(this.#transformer, src[srcOffset] * 255, src[srcOffset + 1] * 255, src[srcOffset + 2] * 255, src[srcOffset + 3] * 255, css);
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
throw new Error(`Unsupported number of components: ${numComps}`);
|
|||
|
|
}
|
|||
|
|
this.#transformer = qcms_transformer_from_memory(iccProfile, inType, Intent.Perceptual);
|
|||
|
|
if (!this.#transformer) {
|
|||
|
|
throw new Error("Failed to create ICC color space");
|
|||
|
|
}
|
|||
|
|
IccColorSpace.#finalizer ||= new FinalizationRegistry(transformer => {
|
|||
|
|
qcms_drop_transformer(transformer);
|
|||
|
|
});
|
|||
|
|
IccColorSpace.#finalizer.register(this, this.#transformer);
|
|||
|
|
}
|
|||
|
|
getRgbHex(src, srcOffset) {
|
|||
|
|
this.#convertPixel(src, srcOffset, true);
|
|||
|
|
return QCMS._cssColor;
|
|||
|
|
}
|
|||
|
|
getRgbItem(src, srcOffset, dest, destOffset) {
|
|||
|
|
QCMS._destBuffer = dest;
|
|||
|
|
QCMS._destOffset = destOffset;
|
|||
|
|
QCMS._destLength = 3;
|
|||
|
|
this.#convertPixel(src, srcOffset, false);
|
|||
|
|
QCMS._destBuffer = null;
|
|||
|
|
}
|
|||
|
|
getRgbBuffer(src, srcOffset, count, dest, destOffset, bits, alpha01) {
|
|||
|
|
src = src.subarray(srcOffset, srcOffset + count * this.numComps);
|
|||
|
|
if (bits !== 8) {
|
|||
|
|
const scale = 255 / ((1 << bits) - 1);
|
|||
|
|
for (let i = 0, ii = src.length; i < ii; i++) {
|
|||
|
|
src[i] *= scale;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
QCMS._mustAddAlpha = alpha01 && dest.buffer === src.buffer;
|
|||
|
|
QCMS._destBuffer = dest;
|
|||
|
|
QCMS._destOffset = destOffset;
|
|||
|
|
QCMS._destLength = count * (3 + alpha01);
|
|||
|
|
qcms_convert_array(this.#transformer, src);
|
|||
|
|
QCMS._mustAddAlpha = false;
|
|||
|
|
QCMS._destBuffer = null;
|
|||
|
|
}
|
|||
|
|
getOutputLength(inputLength, alpha01) {
|
|||
|
|
return inputLength / this.numComps * (3 + alpha01) | 0;
|
|||
|
|
}
|
|||
|
|
static setOptions({
|
|||
|
|
useWasm,
|
|||
|
|
useWorkerFetch,
|
|||
|
|
wasmUrl
|
|||
|
|
}) {
|
|||
|
|
if (!useWorkerFetch) {
|
|||
|
|
this.#useWasm = false;
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
this.#useWasm = useWasm;
|
|||
|
|
this.#wasmUrl = wasmUrl;
|
|||
|
|
}
|
|||
|
|
static get isUsable() {
|
|||
|
|
let isUsable = false;
|
|||
|
|
if (this.#useWasm) {
|
|||
|
|
if (this.#wasmUrl) {
|
|||
|
|
try {
|
|||
|
|
this._module = initSync({
|
|||
|
|
module: fetchSync(`${this.#wasmUrl}qcms_bg.wasm`)
|
|||
|
|
});
|
|||
|
|
isUsable = !!this._module;
|
|||
|
|
QCMS._memory = this._module.memory;
|
|||
|
|
QCMS._makeHexColor = util_Util.makeHexColor;
|
|||
|
|
} catch (e) {
|
|||
|
|
util_warn(`ICCBased color space: "${e}".`);
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
util_warn("No ICC color space support due to missing `wasmUrl` API option");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return shadow(this, "isUsable", isUsable);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class CmykICCBasedCS extends IccColorSpace {
|
|||
|
|
static #iccUrl;
|
|||
|
|
constructor() {
|
|||
|
|
const iccProfile = new Uint8Array(fetchSync(`${CmykICCBasedCS.#iccUrl}CGATS001Compat-v2-micro.icc`));
|
|||
|
|
super(iccProfile, "DeviceCMYK", 4);
|
|||
|
|
}
|
|||
|
|
static setOptions({
|
|||
|
|
iccUrl
|
|||
|
|
}) {
|
|||
|
|
this.#iccUrl = iccUrl;
|
|||
|
|
}
|
|||
|
|
static get isUsable() {
|
|||
|
|
let isUsable = false;
|
|||
|
|
if (IccColorSpace.isUsable) {
|
|||
|
|
if (this.#iccUrl) {
|
|||
|
|
isUsable = true;
|
|||
|
|
} else {
|
|||
|
|
util_warn("No CMYK ICC profile support due to missing `iccUrl` API option");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return shadow(this, "isUsable", isUsable);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./src/core/colorspace_utils.js
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
class ColorSpaceUtils {
|
|||
|
|
static parse({
|
|||
|
|
cs,
|
|||
|
|
xref,
|
|||
|
|
resources = null,
|
|||
|
|
pdfFunctionFactory,
|
|||
|
|
globalColorSpaceCache,
|
|||
|
|
localColorSpaceCache,
|
|||
|
|
asyncIfNotCached = false
|
|||
|
|
}) {
|
|||
|
|
const options = {
|
|||
|
|
xref,
|
|||
|
|
resources,
|
|||
|
|
pdfFunctionFactory,
|
|||
|
|
globalColorSpaceCache,
|
|||
|
|
localColorSpaceCache
|
|||
|
|
};
|
|||
|
|
let csName, csRef, parsedCS;
|
|||
|
|
if (cs instanceof primitives_Ref) {
|
|||
|
|
csRef = cs;
|
|||
|
|
const cachedCS = globalColorSpaceCache.getByRef(csRef) || localColorSpaceCache.getByRef(csRef);
|
|||
|
|
if (cachedCS) {
|
|||
|
|
return cachedCS;
|
|||
|
|
}
|
|||
|
|
cs = xref.fetch(cs);
|
|||
|
|
}
|
|||
|
|
if (cs instanceof Name) {
|
|||
|
|
csName = cs.name;
|
|||
|
|
const cachedCS = localColorSpaceCache.getByName(csName);
|
|||
|
|
if (cachedCS) {
|
|||
|
|
return cachedCS;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
try {
|
|||
|
|
parsedCS = this.#parse(cs, options);
|
|||
|
|
} catch (ex) {
|
|||
|
|
if (asyncIfNotCached && !(ex instanceof MissingDataException)) {
|
|||
|
|
return Promise.reject(ex);
|
|||
|
|
}
|
|||
|
|
throw ex;
|
|||
|
|
}
|
|||
|
|
if (csName || csRef) {
|
|||
|
|
localColorSpaceCache.set(csName, csRef, parsedCS);
|
|||
|
|
if (csRef) {
|
|||
|
|
globalColorSpaceCache.set(null, csRef, parsedCS);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return asyncIfNotCached ? Promise.resolve(parsedCS) : parsedCS;
|
|||
|
|
}
|
|||
|
|
static #subParse(cs, options) {
|
|||
|
|
const {
|
|||
|
|
globalColorSpaceCache
|
|||
|
|
} = options;
|
|||
|
|
let csRef;
|
|||
|
|
if (cs instanceof primitives_Ref) {
|
|||
|
|
csRef = cs;
|
|||
|
|
const cachedCS = globalColorSpaceCache.getByRef(csRef);
|
|||
|
|
if (cachedCS) {
|
|||
|
|
return cachedCS;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const parsedCS = this.#parse(cs, options);
|
|||
|
|
if (csRef) {
|
|||
|
|
globalColorSpaceCache.set(null, csRef, parsedCS);
|
|||
|
|
}
|
|||
|
|
return parsedCS;
|
|||
|
|
}
|
|||
|
|
static #parse(cs, options) {
|
|||
|
|
const {
|
|||
|
|
xref,
|
|||
|
|
resources,
|
|||
|
|
pdfFunctionFactory,
|
|||
|
|
globalColorSpaceCache
|
|||
|
|
} = options;
|
|||
|
|
cs = xref.fetchIfRef(cs);
|
|||
|
|
if (cs instanceof Name) {
|
|||
|
|
switch (cs.name) {
|
|||
|
|
case "G":
|
|||
|
|
case "DeviceGray":
|
|||
|
|
return this.gray;
|
|||
|
|
case "RGB":
|
|||
|
|
case "DeviceRGB":
|
|||
|
|
return this.rgb;
|
|||
|
|
case "DeviceRGBA":
|
|||
|
|
return this.rgba;
|
|||
|
|
case "CMYK":
|
|||
|
|
case "DeviceCMYK":
|
|||
|
|
return this.cmyk;
|
|||
|
|
case "Pattern":
|
|||
|
|
return new PatternCS(null);
|
|||
|
|
default:
|
|||
|
|
if (resources instanceof primitives_Dict) {
|
|||
|
|
const colorSpaces = resources.get("ColorSpace");
|
|||
|
|
if (colorSpaces instanceof primitives_Dict) {
|
|||
|
|
const resourcesCS = colorSpaces.get(cs.name);
|
|||
|
|
if (resourcesCS) {
|
|||
|
|
if (resourcesCS instanceof Name) {
|
|||
|
|
return this.#parse(resourcesCS, options);
|
|||
|
|
}
|
|||
|
|
cs = resourcesCS;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
util_warn(`Unrecognized ColorSpace: ${cs.name}`);
|
|||
|
|
return this.gray;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (Array.isArray(cs)) {
|
|||
|
|
const mode = xref.fetchIfRef(cs[0]).name;
|
|||
|
|
let params, numComps, baseCS, whitePoint, blackPoint, gamma;
|
|||
|
|
switch (mode) {
|
|||
|
|
case "G":
|
|||
|
|
case "DeviceGray":
|
|||
|
|
return this.gray;
|
|||
|
|
case "RGB":
|
|||
|
|
case "DeviceRGB":
|
|||
|
|
return this.rgb;
|
|||
|
|
case "CMYK":
|
|||
|
|
case "DeviceCMYK":
|
|||
|
|
return this.cmyk;
|
|||
|
|
case "CalGray":
|
|||
|
|
params = xref.fetchIfRef(cs[1]);
|
|||
|
|
whitePoint = params.getArray("WhitePoint");
|
|||
|
|
blackPoint = params.getArray("BlackPoint");
|
|||
|
|
gamma = params.get("Gamma");
|
|||
|
|
return new CalGrayCS(whitePoint, blackPoint, gamma);
|
|||
|
|
case "CalRGB":
|
|||
|
|
params = xref.fetchIfRef(cs[1]);
|
|||
|
|
whitePoint = params.getArray("WhitePoint");
|
|||
|
|
blackPoint = params.getArray("BlackPoint");
|
|||
|
|
gamma = params.getArray("Gamma");
|
|||
|
|
const matrix = params.getArray("Matrix");
|
|||
|
|
return new CalRGBCS(whitePoint, blackPoint, gamma, matrix);
|
|||
|
|
case "ICCBased":
|
|||
|
|
const isRef = cs[1] instanceof primitives_Ref;
|
|||
|
|
if (isRef) {
|
|||
|
|
const cachedCS = globalColorSpaceCache.getByRef(cs[1]);
|
|||
|
|
if (cachedCS) {
|
|||
|
|
return cachedCS;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const stream = xref.fetchIfRef(cs[1]);
|
|||
|
|
const dict = stream.dict;
|
|||
|
|
numComps = dict.get("N");
|
|||
|
|
if (IccColorSpace.isUsable) {
|
|||
|
|
try {
|
|||
|
|
const iccCS = new IccColorSpace(stream.getBytes(), "ICCBased", numComps);
|
|||
|
|
if (isRef) {
|
|||
|
|
globalColorSpaceCache.set(null, cs[1], iccCS);
|
|||
|
|
}
|
|||
|
|
return iccCS;
|
|||
|
|
} catch (ex) {
|
|||
|
|
if (ex instanceof MissingDataException) {
|
|||
|
|
throw ex;
|
|||
|
|
}
|
|||
|
|
util_warn(`ICCBased color space (${cs[1]}): "${ex}".`);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const altRaw = dict.getRaw("Alternate");
|
|||
|
|
if (altRaw) {
|
|||
|
|
const altCS = this.#subParse(altRaw, options);
|
|||
|
|
if (altCS.numComps === numComps) {
|
|||
|
|
return altCS;
|
|||
|
|
}
|
|||
|
|
util_warn("ICCBased color space: Ignoring incorrect /Alternate entry.");
|
|||
|
|
}
|
|||
|
|
if (numComps === 1) {
|
|||
|
|
return this.gray;
|
|||
|
|
} else if (numComps === 3) {
|
|||
|
|
return this.rgb;
|
|||
|
|
} else if (numComps === 4) {
|
|||
|
|
return this.cmyk;
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case "Pattern":
|
|||
|
|
baseCS = cs[1] || null;
|
|||
|
|
if (baseCS) {
|
|||
|
|
baseCS = this.#subParse(baseCS, options);
|
|||
|
|
}
|
|||
|
|
return new PatternCS(baseCS);
|
|||
|
|
case "I":
|
|||
|
|
case "Indexed":
|
|||
|
|
baseCS = this.#subParse(cs[1], options);
|
|||
|
|
const hiVal = MathClamp(xref.fetchIfRef(cs[2]), 0, 255);
|
|||
|
|
const lookup = xref.fetchIfRef(cs[3]);
|
|||
|
|
return new IndexedCS(baseCS, hiVal, lookup);
|
|||
|
|
case "Separation":
|
|||
|
|
case "DeviceN":
|
|||
|
|
const name = xref.fetchIfRef(cs[1]);
|
|||
|
|
numComps = Array.isArray(name) ? name.length : 1;
|
|||
|
|
baseCS = this.#subParse(cs[2], options);
|
|||
|
|
const tintFn = pdfFunctionFactory.create(cs[3]);
|
|||
|
|
return new AlternateCS(numComps, baseCS, tintFn);
|
|||
|
|
case "Lab":
|
|||
|
|
params = xref.fetchIfRef(cs[1]);
|
|||
|
|
whitePoint = params.getArray("WhitePoint");
|
|||
|
|
blackPoint = params.getArray("BlackPoint");
|
|||
|
|
const range = params.getArray("Range");
|
|||
|
|
return new LabCS(whitePoint, blackPoint, range);
|
|||
|
|
default:
|
|||
|
|
util_warn(`Unimplemented ColorSpace object: ${mode}`);
|
|||
|
|
return this.gray;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
util_warn(`Unrecognized ColorSpace object: ${cs}`);
|
|||
|
|
return this.gray;
|
|||
|
|
}
|
|||
|
|
static get gray() {
|
|||
|
|
return shadow(this, "gray", new DeviceGrayCS());
|
|||
|
|
}
|
|||
|
|
static get rgb() {
|
|||
|
|
return shadow(this, "rgb", new DeviceRgbCS());
|
|||
|
|
}
|
|||
|
|
static get rgba() {
|
|||
|
|
return shadow(this, "rgba", new DeviceRgbaCS());
|
|||
|
|
}
|
|||
|
|
static get cmyk() {
|
|||
|
|
if (CmykICCBasedCS.isUsable) {
|
|||
|
|
try {
|
|||
|
|
return shadow(this, "cmyk", new CmykICCBasedCS());
|
|||
|
|
} catch {
|
|||
|
|
util_warn("CMYK fallback: DeviceCMYK");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return shadow(this, "cmyk", new DeviceCmykCS());
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./src/shared/image_utils.js
|
|||
|
|
|
|||
|
|
function convertToRGBA(params) {
|
|||
|
|
switch (params.kind) {
|
|||
|
|
case ImageKind.GRAYSCALE_1BPP:
|
|||
|
|
return convertBlackAndWhiteToRGBA(params);
|
|||
|
|
case ImageKind.RGB_24BPP:
|
|||
|
|
return convertRGBToRGBA(params);
|
|||
|
|
}
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
function convertBlackAndWhiteToRGBA({
|
|||
|
|
src,
|
|||
|
|
srcPos = 0,
|
|||
|
|
dest,
|
|||
|
|
width,
|
|||
|
|
height,
|
|||
|
|
nonBlackColor = 0xffffffff,
|
|||
|
|
inverseDecode = false
|
|||
|
|
}) {
|
|||
|
|
const black = FeatureTest.isLittleEndian ? 0xff000000 : 0x000000ff;
|
|||
|
|
const [zeroMapping, oneMapping] = inverseDecode ? [nonBlackColor, black] : [black, nonBlackColor];
|
|||
|
|
const widthInSource = width >> 3;
|
|||
|
|
const widthRemainder = width & 7;
|
|||
|
|
const srcLength = src.length;
|
|||
|
|
dest = new Uint32Array(dest.buffer);
|
|||
|
|
let destPos = 0;
|
|||
|
|
for (let i = 0; i < height; i++) {
|
|||
|
|
for (const max = srcPos + widthInSource; srcPos < max; srcPos++) {
|
|||
|
|
const elem = srcPos < srcLength ? src[srcPos] : 255;
|
|||
|
|
dest[destPos++] = elem & 0b10000000 ? oneMapping : zeroMapping;
|
|||
|
|
dest[destPos++] = elem & 0b1000000 ? oneMapping : zeroMapping;
|
|||
|
|
dest[destPos++] = elem & 0b100000 ? oneMapping : zeroMapping;
|
|||
|
|
dest[destPos++] = elem & 0b10000 ? oneMapping : zeroMapping;
|
|||
|
|
dest[destPos++] = elem & 0b1000 ? oneMapping : zeroMapping;
|
|||
|
|
dest[destPos++] = elem & 0b100 ? oneMapping : zeroMapping;
|
|||
|
|
dest[destPos++] = elem & 0b10 ? oneMapping : zeroMapping;
|
|||
|
|
dest[destPos++] = elem & 0b1 ? oneMapping : zeroMapping;
|
|||
|
|
}
|
|||
|
|
if (widthRemainder === 0) {
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
const elem = srcPos < srcLength ? src[srcPos++] : 255;
|
|||
|
|
for (let j = 0; j < widthRemainder; j++) {
|
|||
|
|
dest[destPos++] = elem & 1 << 7 - j ? oneMapping : zeroMapping;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return {
|
|||
|
|
srcPos,
|
|||
|
|
destPos
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
function convertRGBToRGBA({
|
|||
|
|
src,
|
|||
|
|
srcPos = 0,
|
|||
|
|
dest,
|
|||
|
|
destPos = 0,
|
|||
|
|
width,
|
|||
|
|
height
|
|||
|
|
}) {
|
|||
|
|
let i = 0;
|
|||
|
|
const len = width * height * 3;
|
|||
|
|
const len32 = len >> 2;
|
|||
|
|
const src32 = new Uint32Array(src.buffer, srcPos, len32);
|
|||
|
|
if (FeatureTest.isLittleEndian) {
|
|||
|
|
for (; i < len32 - 2; i += 3, destPos += 4) {
|
|||
|
|
const s1 = src32[i];
|
|||
|
|
const s2 = src32[i + 1];
|
|||
|
|
const s3 = src32[i + 2];
|
|||
|
|
dest[destPos] = s1 | 0xff000000;
|
|||
|
|
dest[destPos + 1] = s1 >>> 24 | s2 << 8 | 0xff000000;
|
|||
|
|
dest[destPos + 2] = s2 >>> 16 | s3 << 16 | 0xff000000;
|
|||
|
|
dest[destPos + 3] = s3 >>> 8 | 0xff000000;
|
|||
|
|
}
|
|||
|
|
for (let j = i * 4, jj = srcPos + len; j < jj; j += 3) {
|
|||
|
|
dest[destPos++] = src[j] | src[j + 1] << 8 | src[j + 2] << 16 | 0xff000000;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
for (; i < len32 - 2; i += 3, destPos += 4) {
|
|||
|
|
const s1 = src32[i];
|
|||
|
|
const s2 = src32[i + 1];
|
|||
|
|
const s3 = src32[i + 2];
|
|||
|
|
dest[destPos] = s1 | 0xff;
|
|||
|
|
dest[destPos + 1] = s1 << 24 | s2 >>> 8 | 0xff;
|
|||
|
|
dest[destPos + 2] = s2 << 16 | s3 >>> 16 | 0xff;
|
|||
|
|
dest[destPos + 3] = s3 << 8 | 0xff;
|
|||
|
|
}
|
|||
|
|
for (let j = i * 4, jj = srcPos + len; j < jj; j += 3) {
|
|||
|
|
dest[destPos++] = src[j] << 24 | src[j + 1] << 16 | src[j + 2] << 8 | 0xff;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return {
|
|||
|
|
srcPos: srcPos + len,
|
|||
|
|
destPos
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
function grayToRGBA(src, dest) {
|
|||
|
|
if (util_FeatureTest.isLittleEndian) {
|
|||
|
|
for (let i = 0, ii = src.length; i < ii; i++) {
|
|||
|
|
dest[i] = src[i] * 0x10101 | 0xff000000;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
for (let i = 0, ii = src.length; i < ii; i++) {
|
|||
|
|
dest[i] = src[i] * 0x1010100 | 0x000000ff;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./src/core/jpg.js
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
class JpegError extends BaseException {
|
|||
|
|
constructor(msg) {
|
|||
|
|
super(msg, "JpegError");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class DNLMarkerError extends BaseException {
|
|||
|
|
constructor(message, scanLines) {
|
|||
|
|
super(message, "DNLMarkerError");
|
|||
|
|
this.scanLines = scanLines;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class EOIMarkerError extends BaseException {
|
|||
|
|
constructor(msg) {
|
|||
|
|
super(msg, "EOIMarkerError");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
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]);
|
|||
|
|
const dctCos1 = 4017;
|
|||
|
|
const dctSin1 = 799;
|
|||
|
|
const dctCos3 = 3406;
|
|||
|
|
const dctSin3 = 2276;
|
|||
|
|
const dctCos6 = 1567;
|
|||
|
|
const dctSin6 = 3784;
|
|||
|
|
const dctSqrt2 = 5793;
|
|||
|
|
const dctSqrt1d2 = 2896;
|
|||
|
|
function buildHuffmanTable(codeLengths, values) {
|
|||
|
|
let k = 0,
|
|||
|
|
i,
|
|||
|
|
j,
|
|||
|
|
length = 16;
|
|||
|
|
while (length > 0 && !codeLengths[length - 1]) {
|
|||
|
|
length--;
|
|||
|
|
}
|
|||
|
|
const code = [{
|
|||
|
|
children: [],
|
|||
|
|
index: 0
|
|||
|
|
}];
|
|||
|
|
let p = code[0],
|
|||
|
|
q;
|
|||
|
|
for (i = 0; i < length; i++) {
|
|||
|
|
for (j = 0; j < codeLengths[i]; j++) {
|
|||
|
|
p = code.pop();
|
|||
|
|
p.children[p.index] = values[k];
|
|||
|
|
while (p.index > 0) {
|
|||
|
|
p = code.pop();
|
|||
|
|
}
|
|||
|
|
p.index++;
|
|||
|
|
code.push(p);
|
|||
|
|
while (code.length <= i) {
|
|||
|
|
code.push(q = {
|
|||
|
|
children: [],
|
|||
|
|
index: 0
|
|||
|
|
});
|
|||
|
|
p.children[p.index] = q.children;
|
|||
|
|
p = q;
|
|||
|
|
}
|
|||
|
|
k++;
|
|||
|
|
}
|
|||
|
|
if (i + 1 < length) {
|
|||
|
|
code.push(q = {
|
|||
|
|
children: [],
|
|||
|
|
index: 0
|
|||
|
|
});
|
|||
|
|
p.children[p.index] = q.children;
|
|||
|
|
p = q;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return code[0].children;
|
|||
|
|
}
|
|||
|
|
function getBlockBufferOffset(component, row, col) {
|
|||
|
|
return 64 * ((component.blocksPerLine + 1) * row + col);
|
|||
|
|
}
|
|||
|
|
function decodeScan(data, offset, frame, components, resetInterval, spectralStart, spectralEnd, successivePrev, successive, parseDNLMarker = false) {
|
|||
|
|
const mcusPerLine = frame.mcusPerLine;
|
|||
|
|
const progressive = frame.progressive;
|
|||
|
|
const startOffset = offset;
|
|||
|
|
let bitsData = 0,
|
|||
|
|
bitsCount = 0;
|
|||
|
|
function readBit() {
|
|||
|
|
if (bitsCount > 0) {
|
|||
|
|
bitsCount--;
|
|||
|
|
return bitsData >> bitsCount & 1;
|
|||
|
|
}
|
|||
|
|
bitsData = data[offset++];
|
|||
|
|
if (bitsData === 0xff) {
|
|||
|
|
const nextByte = data[offset++];
|
|||
|
|
if (nextByte) {
|
|||
|
|
if (nextByte === 0xdc && parseDNLMarker) {
|
|||
|
|
offset += 2;
|
|||
|
|
const scanLines = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
if (scanLines > 0 && scanLines !== frame.scanLines) {
|
|||
|
|
throw new DNLMarkerError("Found DNL marker (0xFFDC) while parsing scan data", scanLines);
|
|||
|
|
}
|
|||
|
|
} else if (nextByte === 0xd9) {
|
|||
|
|
if (parseDNLMarker) {
|
|||
|
|
const maybeScanLines = blockRow * (frame.precision === 8 ? 8 : 0);
|
|||
|
|
if (maybeScanLines > 0 && Math.round(frame.scanLines / maybeScanLines) >= 5) {
|
|||
|
|
throw new DNLMarkerError("Found EOI marker (0xFFD9) while parsing scan data, " + "possibly caused by incorrect `scanLines` parameter", maybeScanLines);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
throw new EOIMarkerError("Found EOI marker (0xFFD9) while parsing scan data");
|
|||
|
|
}
|
|||
|
|
throw new JpegError(`unexpected marker ${(bitsData << 8 | nextByte).toString(16)}`);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
bitsCount = 7;
|
|||
|
|
return bitsData >>> 7;
|
|||
|
|
}
|
|||
|
|
function decodeHuffman(tree) {
|
|||
|
|
let node = tree;
|
|||
|
|
while (true) {
|
|||
|
|
node = node[readBit()];
|
|||
|
|
switch (typeof node) {
|
|||
|
|
case "number":
|
|||
|
|
return node;
|
|||
|
|
case "object":
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
throw new JpegError("invalid huffman sequence");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function receive(length) {
|
|||
|
|
let n = 0;
|
|||
|
|
while (length > 0) {
|
|||
|
|
n = n << 1 | readBit();
|
|||
|
|
length--;
|
|||
|
|
}
|
|||
|
|
return n;
|
|||
|
|
}
|
|||
|
|
function receiveAndExtend(length) {
|
|||
|
|
if (length === 1) {
|
|||
|
|
return readBit() === 1 ? 1 : -1;
|
|||
|
|
}
|
|||
|
|
const n = receive(length);
|
|||
|
|
if (n >= 1 << length - 1) {
|
|||
|
|
return n;
|
|||
|
|
}
|
|||
|
|
return n + (-1 << length) + 1;
|
|||
|
|
}
|
|||
|
|
function decodeBaseline(component, blockOffset) {
|
|||
|
|
const t = decodeHuffman(component.huffmanTableDC);
|
|||
|
|
const diff = t === 0 ? 0 : receiveAndExtend(t);
|
|||
|
|
component.blockData[blockOffset] = component.pred += diff;
|
|||
|
|
let k = 1;
|
|||
|
|
while (k < 64) {
|
|||
|
|
const rs = decodeHuffman(component.huffmanTableAC);
|
|||
|
|
const s = rs & 15,
|
|||
|
|
r = rs >> 4;
|
|||
|
|
if (s === 0) {
|
|||
|
|
if (r < 15) {
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
k += 16;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
k += r;
|
|||
|
|
const z = dctZigZag[k];
|
|||
|
|
component.blockData[blockOffset + z] = receiveAndExtend(s);
|
|||
|
|
k++;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function decodeDCFirst(component, blockOffset) {
|
|||
|
|
const t = decodeHuffman(component.huffmanTableDC);
|
|||
|
|
const diff = t === 0 ? 0 : receiveAndExtend(t) << successive;
|
|||
|
|
component.blockData[blockOffset] = component.pred += diff;
|
|||
|
|
}
|
|||
|
|
function decodeDCSuccessive(component, blockOffset) {
|
|||
|
|
component.blockData[blockOffset] |= readBit() << successive;
|
|||
|
|
}
|
|||
|
|
let eobrun = 0;
|
|||
|
|
function decodeACFirst(component, blockOffset) {
|
|||
|
|
if (eobrun > 0) {
|
|||
|
|
eobrun--;
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
let k = spectralStart;
|
|||
|
|
const e = spectralEnd;
|
|||
|
|
while (k <= e) {
|
|||
|
|
const rs = decodeHuffman(component.huffmanTableAC);
|
|||
|
|
const s = rs & 15,
|
|||
|
|
r = rs >> 4;
|
|||
|
|
if (s === 0) {
|
|||
|
|
if (r < 15) {
|
|||
|
|
eobrun = receive(r) + (1 << r) - 1;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
k += 16;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
k += r;
|
|||
|
|
const z = dctZigZag[k];
|
|||
|
|
component.blockData[blockOffset + z] = receiveAndExtend(s) * (1 << successive);
|
|||
|
|
k++;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
let successiveACState = 0,
|
|||
|
|
successiveACNextValue;
|
|||
|
|
function decodeACSuccessive(component, blockOffset) {
|
|||
|
|
let k = spectralStart;
|
|||
|
|
const e = spectralEnd;
|
|||
|
|
let r = 0;
|
|||
|
|
let s;
|
|||
|
|
let rs;
|
|||
|
|
while (k <= e) {
|
|||
|
|
const offsetZ = blockOffset + dctZigZag[k];
|
|||
|
|
const sign = component.blockData[offsetZ] < 0 ? -1 : 1;
|
|||
|
|
switch (successiveACState) {
|
|||
|
|
case 0:
|
|||
|
|
rs = decodeHuffman(component.huffmanTableAC);
|
|||
|
|
s = rs & 15;
|
|||
|
|
r = rs >> 4;
|
|||
|
|
if (s === 0) {
|
|||
|
|
if (r < 15) {
|
|||
|
|
eobrun = receive(r) + (1 << r);
|
|||
|
|
successiveACState = 4;
|
|||
|
|
} else {
|
|||
|
|
r = 16;
|
|||
|
|
successiveACState = 1;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
if (s !== 1) {
|
|||
|
|
throw new JpegError("invalid ACn encoding");
|
|||
|
|
}
|
|||
|
|
successiveACNextValue = receiveAndExtend(s);
|
|||
|
|
successiveACState = r ? 2 : 3;
|
|||
|
|
}
|
|||
|
|
continue;
|
|||
|
|
case 1:
|
|||
|
|
case 2:
|
|||
|
|
if (component.blockData[offsetZ]) {
|
|||
|
|
component.blockData[offsetZ] += sign * (readBit() << successive);
|
|||
|
|
} else {
|
|||
|
|
r--;
|
|||
|
|
if (r === 0) {
|
|||
|
|
successiveACState = successiveACState === 2 ? 3 : 0;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case 3:
|
|||
|
|
if (component.blockData[offsetZ]) {
|
|||
|
|
component.blockData[offsetZ] += sign * (readBit() << successive);
|
|||
|
|
} else {
|
|||
|
|
component.blockData[offsetZ] = successiveACNextValue << successive;
|
|||
|
|
successiveACState = 0;
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case 4:
|
|||
|
|
if (component.blockData[offsetZ]) {
|
|||
|
|
component.blockData[offsetZ] += sign * (readBit() << successive);
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
k++;
|
|||
|
|
}
|
|||
|
|
if (successiveACState === 4) {
|
|||
|
|
eobrun--;
|
|||
|
|
if (eobrun === 0) {
|
|||
|
|
successiveACState = 0;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
let blockRow = 0;
|
|||
|
|
function decodeMcu(component, decode, mcu, row, col) {
|
|||
|
|
const mcuRow = mcu / mcusPerLine | 0;
|
|||
|
|
const mcuCol = mcu % mcusPerLine;
|
|||
|
|
blockRow = mcuRow * component.v + row;
|
|||
|
|
const blockCol = mcuCol * component.h + col;
|
|||
|
|
const blockOffset = getBlockBufferOffset(component, blockRow, blockCol);
|
|||
|
|
decode(component, blockOffset);
|
|||
|
|
}
|
|||
|
|
function decodeBlock(component, decode, mcu) {
|
|||
|
|
blockRow = mcu / component.blocksPerLine | 0;
|
|||
|
|
const blockCol = mcu % component.blocksPerLine;
|
|||
|
|
const blockOffset = getBlockBufferOffset(component, blockRow, blockCol);
|
|||
|
|
decode(component, blockOffset);
|
|||
|
|
}
|
|||
|
|
const componentsLength = components.length;
|
|||
|
|
let component, i, j, k, n;
|
|||
|
|
let decodeFn;
|
|||
|
|
if (progressive) {
|
|||
|
|
if (spectralStart === 0) {
|
|||
|
|
decodeFn = successivePrev === 0 ? decodeDCFirst : decodeDCSuccessive;
|
|||
|
|
} else {
|
|||
|
|
decodeFn = successivePrev === 0 ? decodeACFirst : decodeACSuccessive;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
decodeFn = decodeBaseline;
|
|||
|
|
}
|
|||
|
|
let mcu = 0,
|
|||
|
|
fileMarker;
|
|||
|
|
const mcuExpected = componentsLength === 1 ? components[0].blocksPerLine * components[0].blocksPerColumn : mcusPerLine * frame.mcusPerColumn;
|
|||
|
|
let h, v;
|
|||
|
|
while (mcu <= mcuExpected) {
|
|||
|
|
const mcuToRead = resetInterval ? Math.min(mcuExpected - mcu, resetInterval) : mcuExpected;
|
|||
|
|
if (mcuToRead > 0) {
|
|||
|
|
for (i = 0; i < componentsLength; i++) {
|
|||
|
|
components[i].pred = 0;
|
|||
|
|
}
|
|||
|
|
eobrun = 0;
|
|||
|
|
if (componentsLength === 1) {
|
|||
|
|
component = components[0];
|
|||
|
|
for (n = 0; n < mcuToRead; n++) {
|
|||
|
|
decodeBlock(component, decodeFn, mcu);
|
|||
|
|
mcu++;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
for (n = 0; n < mcuToRead; n++) {
|
|||
|
|
for (i = 0; i < componentsLength; i++) {
|
|||
|
|
component = components[i];
|
|||
|
|
h = component.h;
|
|||
|
|
v = component.v;
|
|||
|
|
for (j = 0; j < v; j++) {
|
|||
|
|
for (k = 0; k < h; k++) {
|
|||
|
|
decodeMcu(component, decodeFn, mcu, j, k);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
mcu++;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
bitsCount = 0;
|
|||
|
|
fileMarker = findNextFileMarker(data, offset);
|
|||
|
|
if (!fileMarker) {
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
if (fileMarker.invalid) {
|
|||
|
|
const partialMsg = mcuToRead > 0 ? "unexpected" : "excessive";
|
|||
|
|
util_warn(`decodeScan - ${partialMsg} MCU data, current marker is: ${fileMarker.invalid}`);
|
|||
|
|
offset = fileMarker.offset;
|
|||
|
|
}
|
|||
|
|
if (fileMarker.marker >= 0xffd0 && fileMarker.marker <= 0xffd7) {
|
|||
|
|
offset += 2;
|
|||
|
|
} else {
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return offset - startOffset;
|
|||
|
|
}
|
|||
|
|
function quantizeAndInverse(component, blockBufferOffset, p) {
|
|||
|
|
const qt = component.quantizationTable,
|
|||
|
|
blockData = component.blockData;
|
|||
|
|
let v0, v1, v2, v3, v4, v5, v6, v7;
|
|||
|
|
let p0, p1, p2, p3, p4, p5, p6, p7;
|
|||
|
|
let t;
|
|||
|
|
if (!qt) {
|
|||
|
|
throw new JpegError("missing required Quantization Table.");
|
|||
|
|
}
|
|||
|
|
for (let row = 0; row < 64; row += 8) {
|
|||
|
|
p0 = blockData[blockBufferOffset + row];
|
|||
|
|
p1 = blockData[blockBufferOffset + row + 1];
|
|||
|
|
p2 = blockData[blockBufferOffset + row + 2];
|
|||
|
|
p3 = blockData[blockBufferOffset + row + 3];
|
|||
|
|
p4 = blockData[blockBufferOffset + row + 4];
|
|||
|
|
p5 = blockData[blockBufferOffset + row + 5];
|
|||
|
|
p6 = blockData[blockBufferOffset + row + 6];
|
|||
|
|
p7 = blockData[blockBufferOffset + row + 7];
|
|||
|
|
p0 *= qt[row];
|
|||
|
|
if ((p1 | p2 | p3 | p4 | p5 | p6 | p7) === 0) {
|
|||
|
|
t = dctSqrt2 * p0 + 512 >> 10;
|
|||
|
|
p[row] = t;
|
|||
|
|
p[row + 1] = t;
|
|||
|
|
p[row + 2] = t;
|
|||
|
|
p[row + 3] = t;
|
|||
|
|
p[row + 4] = t;
|
|||
|
|
p[row + 5] = t;
|
|||
|
|
p[row + 6] = t;
|
|||
|
|
p[row + 7] = t;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
p1 *= qt[row + 1];
|
|||
|
|
p2 *= qt[row + 2];
|
|||
|
|
p3 *= qt[row + 3];
|
|||
|
|
p4 *= qt[row + 4];
|
|||
|
|
p5 *= qt[row + 5];
|
|||
|
|
p6 *= qt[row + 6];
|
|||
|
|
p7 *= qt[row + 7];
|
|||
|
|
v0 = dctSqrt2 * p0 + 128 >> 8;
|
|||
|
|
v1 = dctSqrt2 * p4 + 128 >> 8;
|
|||
|
|
v2 = p2;
|
|||
|
|
v3 = p6;
|
|||
|
|
v4 = dctSqrt1d2 * (p1 - p7) + 128 >> 8;
|
|||
|
|
v7 = dctSqrt1d2 * (p1 + p7) + 128 >> 8;
|
|||
|
|
v5 = p3 << 4;
|
|||
|
|
v6 = p5 << 4;
|
|||
|
|
v0 = v0 + v1 + 1 >> 1;
|
|||
|
|
v1 = v0 - v1;
|
|||
|
|
t = v2 * dctSin6 + v3 * dctCos6 + 128 >> 8;
|
|||
|
|
v2 = v2 * dctCos6 - v3 * dctSin6 + 128 >> 8;
|
|||
|
|
v3 = t;
|
|||
|
|
v4 = v4 + v6 + 1 >> 1;
|
|||
|
|
v6 = v4 - v6;
|
|||
|
|
v7 = v7 + v5 + 1 >> 1;
|
|||
|
|
v5 = v7 - v5;
|
|||
|
|
v0 = v0 + v3 + 1 >> 1;
|
|||
|
|
v3 = v0 - v3;
|
|||
|
|
v1 = v1 + v2 + 1 >> 1;
|
|||
|
|
v2 = v1 - v2;
|
|||
|
|
t = v4 * dctSin3 + v7 * dctCos3 + 2048 >> 12;
|
|||
|
|
v4 = v4 * dctCos3 - v7 * dctSin3 + 2048 >> 12;
|
|||
|
|
v7 = t;
|
|||
|
|
t = v5 * dctSin1 + v6 * dctCos1 + 2048 >> 12;
|
|||
|
|
v5 = v5 * dctCos1 - v6 * dctSin1 + 2048 >> 12;
|
|||
|
|
v6 = t;
|
|||
|
|
p[row] = v0 + v7;
|
|||
|
|
p[row + 7] = v0 - v7;
|
|||
|
|
p[row + 1] = v1 + v6;
|
|||
|
|
p[row + 6] = v1 - v6;
|
|||
|
|
p[row + 2] = v2 + v5;
|
|||
|
|
p[row + 5] = v2 - v5;
|
|||
|
|
p[row + 3] = v3 + v4;
|
|||
|
|
p[row + 4] = v3 - v4;
|
|||
|
|
}
|
|||
|
|
for (let col = 0; col < 8; ++col) {
|
|||
|
|
p0 = p[col];
|
|||
|
|
p1 = p[col + 8];
|
|||
|
|
p2 = p[col + 16];
|
|||
|
|
p3 = p[col + 24];
|
|||
|
|
p4 = p[col + 32];
|
|||
|
|
p5 = p[col + 40];
|
|||
|
|
p6 = p[col + 48];
|
|||
|
|
p7 = p[col + 56];
|
|||
|
|
if ((p1 | p2 | p3 | p4 | p5 | p6 | p7) === 0) {
|
|||
|
|
t = dctSqrt2 * p0 + 8192 >> 14;
|
|||
|
|
if (t < -2040) {
|
|||
|
|
t = 0;
|
|||
|
|
} else if (t >= 2024) {
|
|||
|
|
t = 255;
|
|||
|
|
} else {
|
|||
|
|
t = t + 2056 >> 4;
|
|||
|
|
}
|
|||
|
|
blockData[blockBufferOffset + col] = t;
|
|||
|
|
blockData[blockBufferOffset + col + 8] = t;
|
|||
|
|
blockData[blockBufferOffset + col + 16] = t;
|
|||
|
|
blockData[blockBufferOffset + col + 24] = t;
|
|||
|
|
blockData[blockBufferOffset + col + 32] = t;
|
|||
|
|
blockData[blockBufferOffset + col + 40] = t;
|
|||
|
|
blockData[blockBufferOffset + col + 48] = t;
|
|||
|
|
blockData[blockBufferOffset + col + 56] = t;
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
v0 = dctSqrt2 * p0 + 2048 >> 12;
|
|||
|
|
v1 = dctSqrt2 * p4 + 2048 >> 12;
|
|||
|
|
v2 = p2;
|
|||
|
|
v3 = p6;
|
|||
|
|
v4 = dctSqrt1d2 * (p1 - p7) + 2048 >> 12;
|
|||
|
|
v7 = dctSqrt1d2 * (p1 + p7) + 2048 >> 12;
|
|||
|
|
v5 = p3;
|
|||
|
|
v6 = p5;
|
|||
|
|
v0 = (v0 + v1 + 1 >> 1) + 4112;
|
|||
|
|
v1 = v0 - v1;
|
|||
|
|
t = v2 * dctSin6 + v3 * dctCos6 + 2048 >> 12;
|
|||
|
|
v2 = v2 * dctCos6 - v3 * dctSin6 + 2048 >> 12;
|
|||
|
|
v3 = t;
|
|||
|
|
v4 = v4 + v6 + 1 >> 1;
|
|||
|
|
v6 = v4 - v6;
|
|||
|
|
v7 = v7 + v5 + 1 >> 1;
|
|||
|
|
v5 = v7 - v5;
|
|||
|
|
v0 = v0 + v3 + 1 >> 1;
|
|||
|
|
v3 = v0 - v3;
|
|||
|
|
v1 = v1 + v2 + 1 >> 1;
|
|||
|
|
v2 = v1 - v2;
|
|||
|
|
t = v4 * dctSin3 + v7 * dctCos3 + 2048 >> 12;
|
|||
|
|
v4 = v4 * dctCos3 - v7 * dctSin3 + 2048 >> 12;
|
|||
|
|
v7 = t;
|
|||
|
|
t = v5 * dctSin1 + v6 * dctCos1 + 2048 >> 12;
|
|||
|
|
v5 = v5 * dctCos1 - v6 * dctSin1 + 2048 >> 12;
|
|||
|
|
v6 = t;
|
|||
|
|
p0 = v0 + v7;
|
|||
|
|
p7 = v0 - v7;
|
|||
|
|
p1 = v1 + v6;
|
|||
|
|
p6 = v1 - v6;
|
|||
|
|
p2 = v2 + v5;
|
|||
|
|
p5 = v2 - v5;
|
|||
|
|
p3 = v3 + v4;
|
|||
|
|
p4 = v3 - v4;
|
|||
|
|
if (p0 < 16) {
|
|||
|
|
p0 = 0;
|
|||
|
|
} else if (p0 >= 4080) {
|
|||
|
|
p0 = 255;
|
|||
|
|
} else {
|
|||
|
|
p0 >>= 4;
|
|||
|
|
}
|
|||
|
|
if (p1 < 16) {
|
|||
|
|
p1 = 0;
|
|||
|
|
} else if (p1 >= 4080) {
|
|||
|
|
p1 = 255;
|
|||
|
|
} else {
|
|||
|
|
p1 >>= 4;
|
|||
|
|
}
|
|||
|
|
if (p2 < 16) {
|
|||
|
|
p2 = 0;
|
|||
|
|
} else if (p2 >= 4080) {
|
|||
|
|
p2 = 255;
|
|||
|
|
} else {
|
|||
|
|
p2 >>= 4;
|
|||
|
|
}
|
|||
|
|
if (p3 < 16) {
|
|||
|
|
p3 = 0;
|
|||
|
|
} else if (p3 >= 4080) {
|
|||
|
|
p3 = 255;
|
|||
|
|
} else {
|
|||
|
|
p3 >>= 4;
|
|||
|
|
}
|
|||
|
|
if (p4 < 16) {
|
|||
|
|
p4 = 0;
|
|||
|
|
} else if (p4 >= 4080) {
|
|||
|
|
p4 = 255;
|
|||
|
|
} else {
|
|||
|
|
p4 >>= 4;
|
|||
|
|
}
|
|||
|
|
if (p5 < 16) {
|
|||
|
|
p5 = 0;
|
|||
|
|
} else if (p5 >= 4080) {
|
|||
|
|
p5 = 255;
|
|||
|
|
} else {
|
|||
|
|
p5 >>= 4;
|
|||
|
|
}
|
|||
|
|
if (p6 < 16) {
|
|||
|
|
p6 = 0;
|
|||
|
|
} else if (p6 >= 4080) {
|
|||
|
|
p6 = 255;
|
|||
|
|
} else {
|
|||
|
|
p6 >>= 4;
|
|||
|
|
}
|
|||
|
|
if (p7 < 16) {
|
|||
|
|
p7 = 0;
|
|||
|
|
} else if (p7 >= 4080) {
|
|||
|
|
p7 = 255;
|
|||
|
|
} else {
|
|||
|
|
p7 >>= 4;
|
|||
|
|
}
|
|||
|
|
blockData[blockBufferOffset + col] = p0;
|
|||
|
|
blockData[blockBufferOffset + col + 8] = p1;
|
|||
|
|
blockData[blockBufferOffset + col + 16] = p2;
|
|||
|
|
blockData[blockBufferOffset + col + 24] = p3;
|
|||
|
|
blockData[blockBufferOffset + col + 32] = p4;
|
|||
|
|
blockData[blockBufferOffset + col + 40] = p5;
|
|||
|
|
blockData[blockBufferOffset + col + 48] = p6;
|
|||
|
|
blockData[blockBufferOffset + col + 56] = p7;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function buildComponentData(frame, component) {
|
|||
|
|
const blocksPerLine = component.blocksPerLine;
|
|||
|
|
const blocksPerColumn = component.blocksPerColumn;
|
|||
|
|
const computationBuffer = new Int16Array(64);
|
|||
|
|
for (let blockRow = 0; blockRow < blocksPerColumn; blockRow++) {
|
|||
|
|
for (let blockCol = 0; blockCol < blocksPerLine; blockCol++) {
|
|||
|
|
const offset = getBlockBufferOffset(component, blockRow, blockCol);
|
|||
|
|
quantizeAndInverse(component, offset, computationBuffer);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return component.blockData;
|
|||
|
|
}
|
|||
|
|
function findNextFileMarker(data, currentPos, startPos = currentPos) {
|
|||
|
|
const maxPos = data.length - 1;
|
|||
|
|
let newPos = startPos < currentPos ? startPos : currentPos;
|
|||
|
|
if (currentPos >= maxPos) {
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
const currentMarker = readUint16(data, currentPos);
|
|||
|
|
if (currentMarker >= 0xffc0 && currentMarker <= 0xfffe) {
|
|||
|
|
return {
|
|||
|
|
invalid: null,
|
|||
|
|
marker: currentMarker,
|
|||
|
|
offset: currentPos
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
let newMarker = readUint16(data, newPos);
|
|||
|
|
while (!(newMarker >= 0xffc0 && newMarker <= 0xfffe)) {
|
|||
|
|
if (++newPos >= maxPos) {
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
newMarker = readUint16(data, newPos);
|
|||
|
|
}
|
|||
|
|
return {
|
|||
|
|
invalid: currentMarker.toString(16),
|
|||
|
|
marker: newMarker,
|
|||
|
|
offset: newPos
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
function prepareComponents(frame) {
|
|||
|
|
const mcusPerLine = Math.ceil(frame.samplesPerLine / 8 / frame.maxH);
|
|||
|
|
const mcusPerColumn = Math.ceil(frame.scanLines / 8 / frame.maxV);
|
|||
|
|
for (const component of frame.components) {
|
|||
|
|
const blocksPerLine = Math.ceil(Math.ceil(frame.samplesPerLine / 8) * component.h / frame.maxH);
|
|||
|
|
const blocksPerColumn = Math.ceil(Math.ceil(frame.scanLines / 8) * component.v / frame.maxV);
|
|||
|
|
const blocksPerLineForMcu = mcusPerLine * component.h;
|
|||
|
|
const blocksPerColumnForMcu = mcusPerColumn * component.v;
|
|||
|
|
const blocksBufferSize = 64 * blocksPerColumnForMcu * (blocksPerLineForMcu + 1);
|
|||
|
|
component.blockData = new Int16Array(blocksBufferSize);
|
|||
|
|
component.blocksPerLine = blocksPerLine;
|
|||
|
|
component.blocksPerColumn = blocksPerColumn;
|
|||
|
|
}
|
|||
|
|
frame.mcusPerLine = mcusPerLine;
|
|||
|
|
frame.mcusPerColumn = mcusPerColumn;
|
|||
|
|
}
|
|||
|
|
function readDataBlock(data, offset) {
|
|||
|
|
const length = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
let endOffset = offset + length - 2;
|
|||
|
|
const fileMarker = findNextFileMarker(data, endOffset, offset);
|
|||
|
|
if (fileMarker?.invalid) {
|
|||
|
|
util_warn("readDataBlock - incorrect length, current marker is: " + fileMarker.invalid);
|
|||
|
|
endOffset = fileMarker.offset;
|
|||
|
|
}
|
|||
|
|
const array = data.subarray(offset, endOffset);
|
|||
|
|
return {
|
|||
|
|
appData: array,
|
|||
|
|
oldOffset: offset,
|
|||
|
|
newOffset: offset + array.length
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
function skipData(data, offset) {
|
|||
|
|
const length = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
const endOffset = offset + length - 2;
|
|||
|
|
const fileMarker = findNextFileMarker(data, endOffset, offset);
|
|||
|
|
if (fileMarker?.invalid) {
|
|||
|
|
return fileMarker.offset;
|
|||
|
|
}
|
|||
|
|
return endOffset;
|
|||
|
|
}
|
|||
|
|
class JpegImage {
|
|||
|
|
constructor({
|
|||
|
|
decodeTransform = null,
|
|||
|
|
colorTransform = -1
|
|||
|
|
} = {}) {
|
|||
|
|
this._decodeTransform = decodeTransform;
|
|||
|
|
this._colorTransform = colorTransform;
|
|||
|
|
}
|
|||
|
|
static canUseImageDecoder(data, colorTransform = -1) {
|
|||
|
|
let exifOffsets = null;
|
|||
|
|
let offset = 0;
|
|||
|
|
let numComponents = null;
|
|||
|
|
let fileMarker = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
if (fileMarker !== 0xffd8) {
|
|||
|
|
throw new JpegError("SOI not found");
|
|||
|
|
}
|
|||
|
|
fileMarker = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
markerLoop: while (fileMarker !== 0xffd9) {
|
|||
|
|
switch (fileMarker) {
|
|||
|
|
case 0xffe1:
|
|||
|
|
const {
|
|||
|
|
appData,
|
|||
|
|
oldOffset,
|
|||
|
|
newOffset
|
|||
|
|
} = readDataBlock(data, offset);
|
|||
|
|
offset = newOffset;
|
|||
|
|
if (appData[0] === 0x45 && appData[1] === 0x78 && appData[2] === 0x69 && appData[3] === 0x66 && appData[4] === 0 && appData[5] === 0) {
|
|||
|
|
if (exifOffsets) {
|
|||
|
|
throw new JpegError("Duplicate EXIF-blocks found.");
|
|||
|
|
}
|
|||
|
|
exifOffsets = {
|
|||
|
|
exifStart: oldOffset + 6,
|
|||
|
|
exifEnd: newOffset
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
fileMarker = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
continue;
|
|||
|
|
case 0xffc0:
|
|||
|
|
case 0xffc1:
|
|||
|
|
case 0xffc2:
|
|||
|
|
numComponents = data[offset + (2 + 1 + 2 + 2)];
|
|||
|
|
break markerLoop;
|
|||
|
|
case 0xffff:
|
|||
|
|
if (data[offset] !== 0xff) {
|
|||
|
|
offset--;
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
offset = skipData(data, offset);
|
|||
|
|
fileMarker = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
}
|
|||
|
|
if (numComponents === 4) {
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
if (numComponents === 3 && colorTransform === 0) {
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
return exifOffsets || {};
|
|||
|
|
}
|
|||
|
|
parse(data, {
|
|||
|
|
dnlScanLines = null
|
|||
|
|
} = {}) {
|
|||
|
|
let offset = 0;
|
|||
|
|
let jfif = null;
|
|||
|
|
let adobe = null;
|
|||
|
|
let frame, resetInterval;
|
|||
|
|
let numSOSMarkers = 0;
|
|||
|
|
const quantizationTables = [];
|
|||
|
|
const huffmanTablesAC = [],
|
|||
|
|
huffmanTablesDC = [];
|
|||
|
|
let fileMarker = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
if (fileMarker !== 0xffd8) {
|
|||
|
|
throw new JpegError("SOI not found");
|
|||
|
|
}
|
|||
|
|
fileMarker = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
markerLoop: while (fileMarker !== 0xffd9) {
|
|||
|
|
let i, j, l;
|
|||
|
|
switch (fileMarker) {
|
|||
|
|
case 0xffe0:
|
|||
|
|
case 0xffe1:
|
|||
|
|
case 0xffe2:
|
|||
|
|
case 0xffe3:
|
|||
|
|
case 0xffe4:
|
|||
|
|
case 0xffe5:
|
|||
|
|
case 0xffe6:
|
|||
|
|
case 0xffe7:
|
|||
|
|
case 0xffe8:
|
|||
|
|
case 0xffe9:
|
|||
|
|
case 0xffea:
|
|||
|
|
case 0xffeb:
|
|||
|
|
case 0xffec:
|
|||
|
|
case 0xffed:
|
|||
|
|
case 0xffee:
|
|||
|
|
case 0xffef:
|
|||
|
|
case 0xfffe:
|
|||
|
|
const {
|
|||
|
|
appData,
|
|||
|
|
newOffset
|
|||
|
|
} = readDataBlock(data, offset);
|
|||
|
|
offset = newOffset;
|
|||
|
|
if (fileMarker === 0xffe0) {
|
|||
|
|
if (appData[0] === 0x4a && appData[1] === 0x46 && appData[2] === 0x49 && appData[3] === 0x46 && appData[4] === 0) {
|
|||
|
|
jfif = {
|
|||
|
|
version: {
|
|||
|
|
major: appData[5],
|
|||
|
|
minor: appData[6]
|
|||
|
|
},
|
|||
|
|
densityUnits: appData[7],
|
|||
|
|
xDensity: appData[8] << 8 | appData[9],
|
|||
|
|
yDensity: appData[10] << 8 | appData[11],
|
|||
|
|
thumbWidth: appData[12],
|
|||
|
|
thumbHeight: appData[13],
|
|||
|
|
thumbData: appData.subarray(14, 14 + 3 * appData[12] * appData[13])
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if (fileMarker === 0xffee) {
|
|||
|
|
if (appData[0] === 0x41 && appData[1] === 0x64 && appData[2] === 0x6f && appData[3] === 0x62 && appData[4] === 0x65) {
|
|||
|
|
adobe = {
|
|||
|
|
version: appData[5] << 8 | appData[6],
|
|||
|
|
flags0: appData[7] << 8 | appData[8],
|
|||
|
|
flags1: appData[9] << 8 | appData[10],
|
|||
|
|
transformCode: appData[11]
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case 0xffdb:
|
|||
|
|
const quantizationTablesLength = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
const quantizationTablesEnd = quantizationTablesLength + offset - 2;
|
|||
|
|
let z;
|
|||
|
|
while (offset < quantizationTablesEnd) {
|
|||
|
|
const quantizationTableSpec = data[offset++];
|
|||
|
|
const tableData = new Uint16Array(64);
|
|||
|
|
if (quantizationTableSpec >> 4 === 0) {
|
|||
|
|
for (j = 0; j < 64; j++) {
|
|||
|
|
z = dctZigZag[j];
|
|||
|
|
tableData[z] = data[offset++];
|
|||
|
|
}
|
|||
|
|
} else if (quantizationTableSpec >> 4 === 1) {
|
|||
|
|
for (j = 0; j < 64; j++) {
|
|||
|
|
z = dctZigZag[j];
|
|||
|
|
tableData[z] = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
throw new JpegError("DQT - invalid table spec");
|
|||
|
|
}
|
|||
|
|
quantizationTables[quantizationTableSpec & 15] = tableData;
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case 0xffc0:
|
|||
|
|
case 0xffc1:
|
|||
|
|
case 0xffc2:
|
|||
|
|
if (frame) {
|
|||
|
|
throw new JpegError("Only single frame JPEGs supported");
|
|||
|
|
}
|
|||
|
|
offset += 2;
|
|||
|
|
frame = {};
|
|||
|
|
frame.extended = fileMarker === 0xffc1;
|
|||
|
|
frame.progressive = fileMarker === 0xffc2;
|
|||
|
|
frame.precision = data[offset++];
|
|||
|
|
const sofScanLines = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
frame.scanLines = dnlScanLines || sofScanLines;
|
|||
|
|
frame.samplesPerLine = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
frame.components = [];
|
|||
|
|
frame.componentIds = {};
|
|||
|
|
const componentsCount = data[offset++];
|
|||
|
|
let maxH = 0,
|
|||
|
|
maxV = 0;
|
|||
|
|
for (i = 0; i < componentsCount; i++) {
|
|||
|
|
const componentId = data[offset];
|
|||
|
|
const h = data[offset + 1] >> 4;
|
|||
|
|
const v = data[offset + 1] & 15;
|
|||
|
|
if (maxH < h) {
|
|||
|
|
maxH = h;
|
|||
|
|
}
|
|||
|
|
if (maxV < v) {
|
|||
|
|
maxV = v;
|
|||
|
|
}
|
|||
|
|
const qId = data[offset + 2];
|
|||
|
|
l = frame.components.push({
|
|||
|
|
h,
|
|||
|
|
v,
|
|||
|
|
quantizationId: qId,
|
|||
|
|
quantizationTable: null
|
|||
|
|
});
|
|||
|
|
frame.componentIds[componentId] = l - 1;
|
|||
|
|
offset += 3;
|
|||
|
|
}
|
|||
|
|
frame.maxH = maxH;
|
|||
|
|
frame.maxV = maxV;
|
|||
|
|
prepareComponents(frame);
|
|||
|
|
break;
|
|||
|
|
case 0xffc4:
|
|||
|
|
const huffmanLength = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
for (i = 2; i < huffmanLength;) {
|
|||
|
|
const huffmanTableSpec = data[offset++];
|
|||
|
|
const codeLengths = new Uint8Array(16);
|
|||
|
|
let codeLengthSum = 0;
|
|||
|
|
for (j = 0; j < 16; j++, offset++) {
|
|||
|
|
codeLengthSum += codeLengths[j] = data[offset];
|
|||
|
|
}
|
|||
|
|
const huffmanValues = new Uint8Array(codeLengthSum);
|
|||
|
|
for (j = 0; j < codeLengthSum; j++, offset++) {
|
|||
|
|
huffmanValues[j] = data[offset];
|
|||
|
|
}
|
|||
|
|
i += 17 + codeLengthSum;
|
|||
|
|
(huffmanTableSpec >> 4 === 0 ? huffmanTablesDC : huffmanTablesAC)[huffmanTableSpec & 15] = buildHuffmanTable(codeLengths, huffmanValues);
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case 0xffdd:
|
|||
|
|
offset += 2;
|
|||
|
|
resetInterval = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
break;
|
|||
|
|
case 0xffda:
|
|||
|
|
const parseDNLMarker = ++numSOSMarkers === 1 && !dnlScanLines;
|
|||
|
|
offset += 2;
|
|||
|
|
const selectorsCount = data[offset++],
|
|||
|
|
components = [];
|
|||
|
|
for (i = 0; i < selectorsCount; i++) {
|
|||
|
|
const index = data[offset++];
|
|||
|
|
const componentIndex = frame.componentIds[index];
|
|||
|
|
const component = frame.components[componentIndex];
|
|||
|
|
component.index = index;
|
|||
|
|
const tableSpec = data[offset++];
|
|||
|
|
component.huffmanTableDC = huffmanTablesDC[tableSpec >> 4];
|
|||
|
|
component.huffmanTableAC = huffmanTablesAC[tableSpec & 15];
|
|||
|
|
components.push(component);
|
|||
|
|
}
|
|||
|
|
const spectralStart = data[offset++],
|
|||
|
|
spectralEnd = data[offset++],
|
|||
|
|
successiveApproximation = data[offset++];
|
|||
|
|
try {
|
|||
|
|
const processed = decodeScan(data, offset, frame, components, resetInterval, spectralStart, spectralEnd, successiveApproximation >> 4, successiveApproximation & 15, parseDNLMarker);
|
|||
|
|
offset += processed;
|
|||
|
|
} catch (ex) {
|
|||
|
|
if (ex instanceof DNLMarkerError) {
|
|||
|
|
util_warn(`${ex.message} -- attempting to re-parse the JPEG image.`);
|
|||
|
|
return this.parse(data, {
|
|||
|
|
dnlScanLines: ex.scanLines
|
|||
|
|
});
|
|||
|
|
} else if (ex instanceof EOIMarkerError) {
|
|||
|
|
util_warn(`${ex.message} -- ignoring the rest of the image data.`);
|
|||
|
|
break markerLoop;
|
|||
|
|
}
|
|||
|
|
throw ex;
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
case 0xffdc:
|
|||
|
|
offset += 4;
|
|||
|
|
break;
|
|||
|
|
case 0xffff:
|
|||
|
|
if (data[offset] !== 0xff) {
|
|||
|
|
offset--;
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
const nextFileMarker = findNextFileMarker(data, offset - 2, offset - 3);
|
|||
|
|
if (nextFileMarker?.invalid) {
|
|||
|
|
util_warn("JpegImage.parse - unexpected data, current marker is: " + nextFileMarker.invalid);
|
|||
|
|
offset = nextFileMarker.offset;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
if (!nextFileMarker || offset >= data.length - 1) {
|
|||
|
|
util_warn("JpegImage.parse - reached the end of the image data " + "without finding an EOI marker (0xFFD9).");
|
|||
|
|
break markerLoop;
|
|||
|
|
}
|
|||
|
|
throw new JpegError("JpegImage.parse - unknown marker: " + fileMarker.toString(16));
|
|||
|
|
}
|
|||
|
|
fileMarker = readUint16(data, offset);
|
|||
|
|
offset += 2;
|
|||
|
|
}
|
|||
|
|
if (!frame) {
|
|||
|
|
throw new JpegError("JpegImage.parse - no frame data found.");
|
|||
|
|
}
|
|||
|
|
this.width = frame.samplesPerLine;
|
|||
|
|
this.height = frame.scanLines;
|
|||
|
|
this.jfif = jfif;
|
|||
|
|
this.adobe = adobe;
|
|||
|
|
this.components = [];
|
|||
|
|
for (const component of frame.components) {
|
|||
|
|
const quantizationTable = quantizationTables[component.quantizationId];
|
|||
|
|
if (quantizationTable) {
|
|||
|
|
component.quantizationTable = quantizationTable;
|
|||
|
|
}
|
|||
|
|
this.components.push({
|
|||
|
|
index: component.index,
|
|||
|
|
output: buildComponentData(frame, component),
|
|||
|
|
scaleX: component.h / frame.maxH,
|
|||
|
|
scaleY: component.v / frame.maxV,
|
|||
|
|
blocksPerLine: component.blocksPerLine,
|
|||
|
|
blocksPerColumn: component.blocksPerColumn
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
this.numComponents = this.components.length;
|
|||
|
|
return undefined;
|
|||
|
|
}
|
|||
|
|
_getLinearizedBlockData(width, height, isSourcePDF = false) {
|
|||
|
|
const scaleX = this.width / width,
|
|||
|
|
scaleY = this.height / height;
|
|||
|
|
let component, componentScaleX, componentScaleY, blocksPerScanline;
|
|||
|
|
let x, y, i, j, k;
|
|||
|
|
let index;
|
|||
|
|
let offset = 0;
|
|||
|
|
let output;
|
|||
|
|
const numComponents = this.components.length;
|
|||
|
|
const dataLength = width * height * numComponents;
|
|||
|
|
const data = new Uint8ClampedArray(dataLength);
|
|||
|
|
const xScaleBlockOffset = new Uint32Array(width);
|
|||
|
|
const mask3LSB = 0xfffffff8;
|
|||
|
|
let lastComponentScaleX;
|
|||
|
|
for (i = 0; i < numComponents; i++) {
|
|||
|
|
component = this.components[i];
|
|||
|
|
componentScaleX = component.scaleX * scaleX;
|
|||
|
|
componentScaleY = component.scaleY * scaleY;
|
|||
|
|
offset = i;
|
|||
|
|
output = component.output;
|
|||
|
|
blocksPerScanline = component.blocksPerLine + 1 << 3;
|
|||
|
|
if (componentScaleX !== lastComponentScaleX) {
|
|||
|
|
for (x = 0; x < width; x++) {
|
|||
|
|
j = 0 | x * componentScaleX;
|
|||
|
|
xScaleBlockOffset[x] = (j & mask3LSB) << 3 | j & 7;
|
|||
|
|
}
|
|||
|
|
lastComponentScaleX = componentScaleX;
|
|||
|
|
}
|
|||
|
|
for (y = 0; y < height; y++) {
|
|||
|
|
j = 0 | y * componentScaleY;
|
|||
|
|
index = blocksPerScanline * (j & mask3LSB) | (j & 7) << 3;
|
|||
|
|
for (x = 0; x < width; x++) {
|
|||
|
|
data[offset] = output[index + xScaleBlockOffset[x]];
|
|||
|
|
offset += numComponents;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
let transform = this._decodeTransform;
|
|||
|
|
if (!isSourcePDF && numComponents === 4 && !transform) {
|
|||
|
|
transform = new Int32Array([-256, 255, -256, 255, -256, 255, -256, 255]);
|
|||
|
|
}
|
|||
|
|
if (transform) {
|
|||
|
|
for (i = 0; i < dataLength;) {
|
|||
|
|
for (j = 0, k = 0; j < numComponents; j++, i++, k += 2) {
|
|||
|
|
data[i] = (data[i] * transform[k] >> 8) + transform[k + 1];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return data;
|
|||
|
|
}
|
|||
|
|
get _isColorConversionNeeded() {
|
|||
|
|
if (this.adobe) {
|
|||
|
|
return !!this.adobe.transformCode;
|
|||
|
|
}
|
|||
|
|
if (this.numComponents === 3) {
|
|||
|
|
if (this._colorTransform === 0) {
|
|||
|
|
return false;
|
|||
|
|
} else if (this.components[0].index === 0x52 && this.components[1].index === 0x47 && this.components[2].index === 0x42) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
if (this._colorTransform === 1) {
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
_convertYccToRgb(data) {
|
|||
|
|
let Y, Cb, Cr;
|
|||
|
|
for (let i = 0, length = data.length; i < length; i += 3) {
|
|||
|
|
Y = data[i];
|
|||
|
|
Cb = data[i + 1];
|
|||
|
|
Cr = data[i + 2];
|
|||
|
|
data[i] = Y - 179.456 + 1.402 * Cr;
|
|||
|
|
data[i + 1] = Y + 135.459 - 0.344 * Cb - 0.714 * Cr;
|
|||
|
|
data[i + 2] = Y - 226.816 + 1.772 * Cb;
|
|||
|
|
}
|
|||
|
|
return data;
|
|||
|
|
}
|
|||
|
|
_convertYccToRgba(data, out) {
|
|||
|
|
for (let i = 0, j = 0, length = data.length; i < length; i += 3, j += 4) {
|
|||
|
|
const Y = data[i];
|
|||
|
|
const Cb = data[i + 1];
|
|||
|
|
const Cr = data[i + 2];
|
|||
|
|
out[j] = Y - 179.456 + 1.402 * Cr;
|
|||
|
|
out[j + 1] = Y + 135.459 - 0.344 * Cb - 0.714 * Cr;
|
|||
|
|
out[j + 2] = Y - 226.816 + 1.772 * Cb;
|
|||
|
|
out[j + 3] = 255;
|
|||
|
|
}
|
|||
|
|
return out;
|
|||
|
|
}
|
|||
|
|
_convertYcckToRgb(data) {
|
|||
|
|
this._convertYcckToCmyk(data);
|
|||
|
|
return this._convertCmykToRgb(data);
|
|||
|
|
}
|
|||
|
|
_convertYcckToRgba(data) {
|
|||
|
|
this._convertYcckToCmyk(data);
|
|||
|
|
return this._convertCmykToRgba(data);
|
|||
|
|
}
|
|||
|
|
_convertYcckToCmyk(data) {
|
|||
|
|
let Y, Cb, Cr;
|
|||
|
|
for (let i = 0, length = data.length; i < length; i += 4) {
|
|||
|
|
Y = data[i];
|
|||
|
|
Cb = data[i + 1];
|
|||
|
|
Cr = data[i + 2];
|
|||
|
|
data[i] = 434.456 - Y - 1.402 * Cr;
|
|||
|
|
data[i + 1] = 119.541 - Y + 0.344 * Cb + 0.714 * Cr;
|
|||
|
|
data[i + 2] = 481.816 - Y - 1.772 * Cb;
|
|||
|
|
}
|
|||
|
|
return data;
|
|||
|
|
}
|
|||
|
|
_convertCmykToRgb(data) {
|
|||
|
|
const count = data.length / 4;
|
|||
|
|
ColorSpaceUtils.cmyk.getRgbBuffer(data, 0, count, data, 0, 8, 0);
|
|||
|
|
return data.subarray(0, count * 3);
|
|||
|
|
}
|
|||
|
|
_convertCmykToRgba(data) {
|
|||
|
|
ColorSpaceUtils.cmyk.getRgbBuffer(data, 0, data.length / 4, data, 0, 8, 1);
|
|||
|
|
if (ColorSpaceUtils.cmyk instanceof DeviceCmykCS) {
|
|||
|
|
for (let i = 3, ii = data.length; i < ii; i += 4) {
|
|||
|
|
data[i] = 255;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return data;
|
|||
|
|
}
|
|||
|
|
getData({
|
|||
|
|
width,
|
|||
|
|
height,
|
|||
|
|
forceRGBA = false,
|
|||
|
|
forceRGB = false,
|
|||
|
|
isSourcePDF = false
|
|||
|
|
}) {
|
|||
|
|
if (this.numComponents > 4) {
|
|||
|
|
throw new JpegError("Unsupported color mode");
|
|||
|
|
}
|
|||
|
|
const data = this._getLinearizedBlockData(width, height, isSourcePDF);
|
|||
|
|
if (this.numComponents === 1 && (forceRGBA || forceRGB)) {
|
|||
|
|
const len = data.length * (forceRGBA ? 4 : 3);
|
|||
|
|
const rgbaData = new Uint8ClampedArray(len);
|
|||
|
|
let offset = 0;
|
|||
|
|
if (forceRGBA) {
|
|||
|
|
grayToRGBA(data, new Uint32Array(rgbaData.buffer));
|
|||
|
|
} else {
|
|||
|
|
for (const grayColor of data) {
|
|||
|
|
rgbaData[offset++] = grayColor;
|
|||
|
|
rgbaData[offset++] = grayColor;
|
|||
|
|
rgbaData[offset++] = grayColor;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return rgbaData;
|
|||
|
|
} else if (this.numComponents === 3 && this._isColorConversionNeeded) {
|
|||
|
|
if (forceRGBA) {
|
|||
|
|
const rgbaData = new Uint8ClampedArray(data.length / 3 * 4);
|
|||
|
|
return this._convertYccToRgba(data, rgbaData);
|
|||
|
|
}
|
|||
|
|
return this._convertYccToRgb(data);
|
|||
|
|
} else if (this.numComponents === 4) {
|
|||
|
|
if (this._isColorConversionNeeded) {
|
|||
|
|
if (forceRGBA) {
|
|||
|
|
return this._convertYcckToRgba(data);
|
|||
|
|
}
|
|||
|
|
if (forceRGB) {
|
|||
|
|
return this._convertYcckToRgb(data);
|
|||
|
|
}
|
|||
|
|
return this._convertYcckToCmyk(data);
|
|||
|
|
} else if (forceRGBA) {
|
|||
|
|
return this._convertCmykToRgba(data);
|
|||
|
|
} else if (forceRGB) {
|
|||
|
|
return this._convertCmykToRgb(data);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return data;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./external/openjpeg/openjpeg.js
|
|||
|
|
var OpenJPEG = (() => {
|
|||
|
|
return async function (moduleArg = {}) {
|
|||
|
|
var moduleRtn;
|
|||
|
|
var Module = moduleArg;
|
|||
|
|
var readyPromiseResolve, readyPromiseReject;
|
|||
|
|
var readyPromise = new Promise((resolve, reject) => {
|
|||
|
|
readyPromiseResolve = resolve;
|
|||
|
|
readyPromiseReject = reject;
|
|||
|
|
});
|
|||
|
|
var ENVIRONMENT_IS_WEB = true;
|
|||
|
|
var ENVIRONMENT_IS_WORKER = false;
|
|||
|
|
var arguments_ = [];
|
|||
|
|
var thisProgram = "./this.program";
|
|||
|
|
var quit_ = (status, toThrow) => {
|
|||
|
|
throw toThrow;
|
|||
|
|
};
|
|||
|
|
var _scriptName = import.meta.url;
|
|||
|
|
var scriptDirectory = "";
|
|||
|
|
var readAsync, readBinary;
|
|||
|
|
if (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER) {
|
|||
|
|
try {
|
|||
|
|
scriptDirectory = new URL(".", _scriptName).href;
|
|||
|
|
} catch {}
|
|||
|
|
readAsync = async url => {
|
|||
|
|
var response = await fetch(url, {
|
|||
|
|
credentials: "same-origin"
|
|||
|
|
});
|
|||
|
|
if (response.ok) {
|
|||
|
|
return response.arrayBuffer();
|
|||
|
|
}
|
|||
|
|
throw new Error(response.status + " : " + response.url);
|
|||
|
|
};
|
|||
|
|
} else {}
|
|||
|
|
var out = console.log.bind(console);
|
|||
|
|
var err = console.error.bind(console);
|
|||
|
|
var wasmBinary;
|
|||
|
|
var wasmMemory;
|
|||
|
|
var ABORT = false;
|
|||
|
|
var EXITSTATUS;
|
|||
|
|
var HEAP8, HEAPU8, HEAP16, HEAPU16, HEAP32, HEAPU32, HEAPF32, HEAP64, HEAPU64, HEAPF64;
|
|||
|
|
var runtimeInitialized = false;
|
|||
|
|
function updateMemoryViews() {
|
|||
|
|
var b = wasmMemory.buffer;
|
|||
|
|
HEAP8 = new Int8Array(b);
|
|||
|
|
HEAP16 = new Int16Array(b);
|
|||
|
|
HEAPU8 = new Uint8Array(b);
|
|||
|
|
HEAPU16 = new Uint16Array(b);
|
|||
|
|
HEAP32 = new Int32Array(b);
|
|||
|
|
HEAPU32 = new Uint32Array(b);
|
|||
|
|
HEAPF32 = new Float32Array(b);
|
|||
|
|
HEAPF64 = new Float64Array(b);
|
|||
|
|
HEAP64 = new BigInt64Array(b);
|
|||
|
|
HEAPU64 = new BigUint64Array(b);
|
|||
|
|
}
|
|||
|
|
function preRun() {
|
|||
|
|
if (Module["preRun"]) {
|
|||
|
|
if (typeof Module["preRun"] == "function") Module["preRun"] = [Module["preRun"]];
|
|||
|
|
while (Module["preRun"].length) {
|
|||
|
|
addOnPreRun(Module["preRun"].shift());
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
callRuntimeCallbacks(onPreRuns);
|
|||
|
|
}
|
|||
|
|
function initRuntime() {
|
|||
|
|
runtimeInitialized = true;
|
|||
|
|
wasmExports["t"]();
|
|||
|
|
}
|
|||
|
|
function postRun() {
|
|||
|
|
if (Module["postRun"]) {
|
|||
|
|
if (typeof Module["postRun"] == "function") Module["postRun"] = [Module["postRun"]];
|
|||
|
|
while (Module["postRun"].length) {
|
|||
|
|
addOnPostRun(Module["postRun"].shift());
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
callRuntimeCallbacks(onPostRuns);
|
|||
|
|
}
|
|||
|
|
var runDependencies = 0;
|
|||
|
|
var dependenciesFulfilled = null;
|
|||
|
|
function addRunDependency(id) {
|
|||
|
|
runDependencies++;
|
|||
|
|
Module["monitorRunDependencies"]?.(runDependencies);
|
|||
|
|
}
|
|||
|
|
function removeRunDependency(id) {
|
|||
|
|
runDependencies--;
|
|||
|
|
Module["monitorRunDependencies"]?.(runDependencies);
|
|||
|
|
if (runDependencies == 0) {
|
|||
|
|
if (dependenciesFulfilled) {
|
|||
|
|
var callback = dependenciesFulfilled;
|
|||
|
|
dependenciesFulfilled = null;
|
|||
|
|
callback();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function abort(what) {
|
|||
|
|
Module["onAbort"]?.(what);
|
|||
|
|
what = "Aborted(" + what + ")";
|
|||
|
|
err(what);
|
|||
|
|
ABORT = true;
|
|||
|
|
what += ". Build with -sASSERTIONS for more info.";
|
|||
|
|
var e = new WebAssembly.RuntimeError(what);
|
|||
|
|
readyPromiseReject(e);
|
|||
|
|
throw e;
|
|||
|
|
}
|
|||
|
|
var wasmBinaryFile;
|
|||
|
|
function getWasmImports() {
|
|||
|
|
return {
|
|||
|
|
a: wasmImports
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
async function createWasm() {
|
|||
|
|
function receiveInstance(instance, module) {
|
|||
|
|
wasmExports = instance.exports;
|
|||
|
|
wasmMemory = wasmExports["s"];
|
|||
|
|
updateMemoryViews();
|
|||
|
|
removeRunDependency("wasm-instantiate");
|
|||
|
|
return wasmExports;
|
|||
|
|
}
|
|||
|
|
addRunDependency("wasm-instantiate");
|
|||
|
|
var info = getWasmImports();
|
|||
|
|
return new Promise((resolve, reject) => {
|
|||
|
|
Module["instantiateWasm"](info, (mod, inst) => {
|
|||
|
|
resolve(receiveInstance(mod, inst));
|
|||
|
|
});
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
class ExitStatus {
|
|||
|
|
name = "ExitStatus";
|
|||
|
|
constructor(status) {
|
|||
|
|
this.message = `Program terminated with exit(${status})`;
|
|||
|
|
this.status = status;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
var callRuntimeCallbacks = callbacks => {
|
|||
|
|
while (callbacks.length > 0) {
|
|||
|
|
callbacks.shift()(Module);
|
|||
|
|
}
|
|||
|
|
};
|
|||
|
|
var onPostRuns = [];
|
|||
|
|
var addOnPostRun = cb => onPostRuns.push(cb);
|
|||
|
|
var onPreRuns = [];
|
|||
|
|
var addOnPreRun = cb => onPreRuns.push(cb);
|
|||
|
|
var noExitRuntime = true;
|
|||
|
|
var __abort_js = () => abort("");
|
|||
|
|
var runtimeKeepaliveCounter = 0;
|
|||
|
|
var __emscripten_runtime_keepalive_clear = () => {
|
|||
|
|
noExitRuntime = false;
|
|||
|
|
runtimeKeepaliveCounter = 0;
|
|||
|
|
};
|
|||
|
|
var timers = {};
|
|||
|
|
var handleException = e => {
|
|||
|
|
if (e instanceof ExitStatus || e == "unwind") {
|
|||
|
|
return EXITSTATUS;
|
|||
|
|
}
|
|||
|
|
quit_(1, e);
|
|||
|
|
};
|
|||
|
|
var keepRuntimeAlive = () => noExitRuntime || runtimeKeepaliveCounter > 0;
|
|||
|
|
var _proc_exit = code => {
|
|||
|
|
EXITSTATUS = code;
|
|||
|
|
if (!keepRuntimeAlive()) {
|
|||
|
|
Module["onExit"]?.(code);
|
|||
|
|
ABORT = true;
|
|||
|
|
}
|
|||
|
|
quit_(code, new ExitStatus(code));
|
|||
|
|
};
|
|||
|
|
var exitJS = (status, implicit) => {
|
|||
|
|
EXITSTATUS = status;
|
|||
|
|
_proc_exit(status);
|
|||
|
|
};
|
|||
|
|
var _exit = exitJS;
|
|||
|
|
var maybeExit = () => {
|
|||
|
|
if (!keepRuntimeAlive()) {
|
|||
|
|
try {
|
|||
|
|
_exit(EXITSTATUS);
|
|||
|
|
} catch (e) {
|
|||
|
|
handleException(e);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
};
|
|||
|
|
var callUserCallback = func => {
|
|||
|
|
if (ABORT) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
try {
|
|||
|
|
func();
|
|||
|
|
maybeExit();
|
|||
|
|
} catch (e) {
|
|||
|
|
handleException(e);
|
|||
|
|
}
|
|||
|
|
};
|
|||
|
|
var _emscripten_get_now = () => performance.now();
|
|||
|
|
var __setitimer_js = (which, timeout_ms) => {
|
|||
|
|
if (timers[which]) {
|
|||
|
|
clearTimeout(timers[which].id);
|
|||
|
|
delete timers[which];
|
|||
|
|
}
|
|||
|
|
if (!timeout_ms) return 0;
|
|||
|
|
var id = setTimeout(() => {
|
|||
|
|
delete timers[which];
|
|||
|
|
callUserCallback(() => __emscripten_timeout(which, _emscripten_get_now()));
|
|||
|
|
}, timeout_ms);
|
|||
|
|
timers[which] = {
|
|||
|
|
id,
|
|||
|
|
timeout_ms
|
|||
|
|
};
|
|||
|
|
return 0;
|
|||
|
|
};
|
|||
|
|
function _copy_pixels_1(compG_ptr, nb_pixels) {
|
|||
|
|
compG_ptr >>= 2;
|
|||
|
|
const imageData = Module.imageData = new Uint8ClampedArray(nb_pixels);
|
|||
|
|
const compG = HEAP32.subarray(compG_ptr, compG_ptr + nb_pixels);
|
|||
|
|
imageData.set(compG);
|
|||
|
|
}
|
|||
|
|
function _copy_pixels_3(compR_ptr, compG_ptr, compB_ptr, nb_pixels) {
|
|||
|
|
compR_ptr >>= 2;
|
|||
|
|
compG_ptr >>= 2;
|
|||
|
|
compB_ptr >>= 2;
|
|||
|
|
const imageData = Module.imageData = new Uint8ClampedArray(nb_pixels * 3);
|
|||
|
|
const compR = HEAP32.subarray(compR_ptr, compR_ptr + nb_pixels);
|
|||
|
|
const compG = HEAP32.subarray(compG_ptr, compG_ptr + nb_pixels);
|
|||
|
|
const compB = HEAP32.subarray(compB_ptr, compB_ptr + nb_pixels);
|
|||
|
|
for (let i = 0; i < nb_pixels; i++) {
|
|||
|
|
imageData[3 * i] = compR[i];
|
|||
|
|
imageData[3 * i + 1] = compG[i];
|
|||
|
|
imageData[3 * i + 2] = compB[i];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function _copy_pixels_4(compR_ptr, compG_ptr, compB_ptr, compA_ptr, nb_pixels) {
|
|||
|
|
compR_ptr >>= 2;
|
|||
|
|
compG_ptr >>= 2;
|
|||
|
|
compB_ptr >>= 2;
|
|||
|
|
compA_ptr >>= 2;
|
|||
|
|
const imageData = Module.imageData = new Uint8ClampedArray(nb_pixels * 4);
|
|||
|
|
const compR = HEAP32.subarray(compR_ptr, compR_ptr + nb_pixels);
|
|||
|
|
const compG = HEAP32.subarray(compG_ptr, compG_ptr + nb_pixels);
|
|||
|
|
const compB = HEAP32.subarray(compB_ptr, compB_ptr + nb_pixels);
|
|||
|
|
const compA = HEAP32.subarray(compA_ptr, compA_ptr + nb_pixels);
|
|||
|
|
for (let i = 0; i < nb_pixels; i++) {
|
|||
|
|
imageData[4 * i] = compR[i];
|
|||
|
|
imageData[4 * i + 1] = compG[i];
|
|||
|
|
imageData[4 * i + 2] = compB[i];
|
|||
|
|
imageData[4 * i + 3] = compA[i];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
var getHeapMax = () => 2147483648;
|
|||
|
|
var alignMemory = (size, alignment) => Math.ceil(size / alignment) * alignment;
|
|||
|
|
var growMemory = size => {
|
|||
|
|
var b = wasmMemory.buffer;
|
|||
|
|
var pages = (size - b.byteLength + 65535) / 65536 | 0;
|
|||
|
|
try {
|
|||
|
|
wasmMemory.grow(pages);
|
|||
|
|
updateMemoryViews();
|
|||
|
|
return 1;
|
|||
|
|
} catch (e) {}
|
|||
|
|
};
|
|||
|
|
var _emscripten_resize_heap = requestedSize => {
|
|||
|
|
var oldSize = HEAPU8.length;
|
|||
|
|
requestedSize >>>= 0;
|
|||
|
|
var maxHeapSize = getHeapMax();
|
|||
|
|
if (requestedSize > maxHeapSize) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
for (var cutDown = 1; cutDown <= 4; cutDown *= 2) {
|
|||
|
|
var overGrownHeapSize = oldSize * (1 + .2 / cutDown);
|
|||
|
|
overGrownHeapSize = Math.min(overGrownHeapSize, requestedSize + 100663296);
|
|||
|
|
var newSize = Math.min(maxHeapSize, alignMemory(Math.max(requestedSize, overGrownHeapSize), 65536));
|
|||
|
|
var replacement = growMemory(newSize);
|
|||
|
|
if (replacement) {
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return false;
|
|||
|
|
};
|
|||
|
|
var ENV = {};
|
|||
|
|
var getExecutableName = () => thisProgram || "./this.program";
|
|||
|
|
var getEnvStrings = () => {
|
|||
|
|
if (!getEnvStrings.strings) {
|
|||
|
|
var lang = (typeof navigator == "object" && navigator.languages && navigator.languages[0] || "C").replace("-", "_") + ".UTF-8";
|
|||
|
|
var env = {
|
|||
|
|
USER: "web_user",
|
|||
|
|
LOGNAME: "web_user",
|
|||
|
|
PATH: "/",
|
|||
|
|
PWD: "/",
|
|||
|
|
HOME: "/home/web_user",
|
|||
|
|
LANG: lang,
|
|||
|
|
_: getExecutableName()
|
|||
|
|
};
|
|||
|
|
for (var x in ENV) {
|
|||
|
|
if (ENV[x] === undefined) delete env[x];else env[x] = ENV[x];
|
|||
|
|
}
|
|||
|
|
var strings = [];
|
|||
|
|
for (var x in env) {
|
|||
|
|
strings.push(`${x}=${env[x]}`);
|
|||
|
|
}
|
|||
|
|
getEnvStrings.strings = strings;
|
|||
|
|
}
|
|||
|
|
return getEnvStrings.strings;
|
|||
|
|
};
|
|||
|
|
var stringToUTF8Array = (str, heap, outIdx, maxBytesToWrite) => {
|
|||
|
|
if (!(maxBytesToWrite > 0)) return 0;
|
|||
|
|
var startIdx = outIdx;
|
|||
|
|
var endIdx = outIdx + maxBytesToWrite - 1;
|
|||
|
|
for (var i = 0; i < str.length; ++i) {
|
|||
|
|
var u = str.charCodeAt(i);
|
|||
|
|
if (u >= 55296 && u <= 57343) {
|
|||
|
|
var u1 = str.charCodeAt(++i);
|
|||
|
|
u = 65536 + ((u & 1023) << 10) | u1 & 1023;
|
|||
|
|
}
|
|||
|
|
if (u <= 127) {
|
|||
|
|
if (outIdx >= endIdx) break;
|
|||
|
|
heap[outIdx++] = u;
|
|||
|
|
} else if (u <= 2047) {
|
|||
|
|
if (outIdx + 1 >= endIdx) break;
|
|||
|
|
heap[outIdx++] = 192 | u >> 6;
|
|||
|
|
heap[outIdx++] = 128 | u & 63;
|
|||
|
|
} else if (u <= 65535) {
|
|||
|
|
if (outIdx + 2 >= endIdx) break;
|
|||
|
|
heap[outIdx++] = 224 | u >> 12;
|
|||
|
|
heap[outIdx++] = 128 | u >> 6 & 63;
|
|||
|
|
heap[outIdx++] = 128 | u & 63;
|
|||
|
|
} else {
|
|||
|
|
if (outIdx + 3 >= endIdx) break;
|
|||
|
|
heap[outIdx++] = 240 | u >> 18;
|
|||
|
|
heap[outIdx++] = 128 | u >> 12 & 63;
|
|||
|
|
heap[outIdx++] = 128 | u >> 6 & 63;
|
|||
|
|
heap[outIdx++] = 128 | u & 63;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
heap[outIdx] = 0;
|
|||
|
|
return outIdx - startIdx;
|
|||
|
|
};
|
|||
|
|
var stringToUTF8 = (str, outPtr, maxBytesToWrite) => stringToUTF8Array(str, HEAPU8, outPtr, maxBytesToWrite);
|
|||
|
|
var _environ_get = (__environ, environ_buf) => {
|
|||
|
|
var bufSize = 0;
|
|||
|
|
var envp = 0;
|
|||
|
|
for (var string of getEnvStrings()) {
|
|||
|
|
var ptr = environ_buf + bufSize;
|
|||
|
|
HEAPU32[__environ + envp >> 2] = ptr;
|
|||
|
|
bufSize += stringToUTF8(string, ptr, Infinity) + 1;
|
|||
|
|
envp += 4;
|
|||
|
|
}
|
|||
|
|
return 0;
|
|||
|
|
};
|
|||
|
|
var lengthBytesUTF8 = str => {
|
|||
|
|
var len = 0;
|
|||
|
|
for (var i = 0; i < str.length; ++i) {
|
|||
|
|
var c = str.charCodeAt(i);
|
|||
|
|
if (c <= 127) {
|
|||
|
|
len++;
|
|||
|
|
} else if (c <= 2047) {
|
|||
|
|
len += 2;
|
|||
|
|
} else if (c >= 55296 && c <= 57343) {
|
|||
|
|
len += 4;
|
|||
|
|
++i;
|
|||
|
|
} else {
|
|||
|
|
len += 3;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return len;
|
|||
|
|
};
|
|||
|
|
var _environ_sizes_get = (penviron_count, penviron_buf_size) => {
|
|||
|
|
var strings = getEnvStrings();
|
|||
|
|
HEAPU32[penviron_count >> 2] = strings.length;
|
|||
|
|
var bufSize = 0;
|
|||
|
|
for (var string of strings) {
|
|||
|
|
bufSize += lengthBytesUTF8(string) + 1;
|
|||
|
|
}
|
|||
|
|
HEAPU32[penviron_buf_size >> 2] = bufSize;
|
|||
|
|
return 0;
|
|||
|
|
};
|
|||
|
|
var _fd_close = fd => 52;
|
|||
|
|
var INT53_MAX = 9007199254740992;
|
|||
|
|
var INT53_MIN = -9007199254740992;
|
|||
|
|
var bigintToI53Checked = num => num < INT53_MIN || num > INT53_MAX ? NaN : Number(num);
|
|||
|
|
function _fd_seek(fd, offset, whence, newOffset) {
|
|||
|
|
offset = bigintToI53Checked(offset);
|
|||
|
|
return 70;
|
|||
|
|
}
|
|||
|
|
var printCharBuffers = [null, [], []];
|
|||
|
|
var UTF8Decoder = typeof TextDecoder != "undefined" ? new TextDecoder() : undefined;
|
|||
|
|
var UTF8ArrayToString = (heapOrArray, idx = 0, maxBytesToRead = NaN) => {
|
|||
|
|
var endIdx = idx + maxBytesToRead;
|
|||
|
|
var endPtr = idx;
|
|||
|
|
while (heapOrArray[endPtr] && !(endPtr >= endIdx)) ++endPtr;
|
|||
|
|
if (endPtr - idx > 16 && heapOrArray.buffer && UTF8Decoder) {
|
|||
|
|
return UTF8Decoder.decode(heapOrArray.subarray(idx, endPtr));
|
|||
|
|
}
|
|||
|
|
var str = "";
|
|||
|
|
while (idx < endPtr) {
|
|||
|
|
var u0 = heapOrArray[idx++];
|
|||
|
|
if (!(u0 & 128)) {
|
|||
|
|
str += String.fromCharCode(u0);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
var u1 = heapOrArray[idx++] & 63;
|
|||
|
|
if ((u0 & 224) == 192) {
|
|||
|
|
str += String.fromCharCode((u0 & 31) << 6 | u1);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
var u2 = heapOrArray[idx++] & 63;
|
|||
|
|
if ((u0 & 240) == 224) {
|
|||
|
|
u0 = (u0 & 15) << 12 | u1 << 6 | u2;
|
|||
|
|
} else {
|
|||
|
|
u0 = (u0 & 7) << 18 | u1 << 12 | u2 << 6 | heapOrArray[idx++] & 63;
|
|||
|
|
}
|
|||
|
|
if (u0 < 65536) {
|
|||
|
|
str += String.fromCharCode(u0);
|
|||
|
|
} else {
|
|||
|
|
var ch = u0 - 65536;
|
|||
|
|
str += String.fromCharCode(55296 | ch >> 10, 56320 | ch & 1023);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return str;
|
|||
|
|
};
|
|||
|
|
var printChar = (stream, curr) => {
|
|||
|
|
var buffer = printCharBuffers[stream];
|
|||
|
|
if (curr === 0 || curr === 10) {
|
|||
|
|
(stream === 1 ? out : err)(UTF8ArrayToString(buffer));
|
|||
|
|
buffer.length = 0;
|
|||
|
|
} else {
|
|||
|
|
buffer.push(curr);
|
|||
|
|
}
|
|||
|
|
};
|
|||
|
|
var UTF8ToString = (ptr, maxBytesToRead) => ptr ? UTF8ArrayToString(HEAPU8, ptr, maxBytesToRead) : "";
|
|||
|
|
var _fd_write = (fd, iov, iovcnt, pnum) => {
|
|||
|
|
var num = 0;
|
|||
|
|
for (var i = 0; i < iovcnt; i++) {
|
|||
|
|
var ptr = HEAPU32[iov >> 2];
|
|||
|
|
var len = HEAPU32[iov + 4 >> 2];
|
|||
|
|
iov += 8;
|
|||
|
|
for (var j = 0; j < len; j++) {
|
|||
|
|
printChar(fd, HEAPU8[ptr + j]);
|
|||
|
|
}
|
|||
|
|
num += len;
|
|||
|
|
}
|
|||
|
|
HEAPU32[pnum >> 2] = num;
|
|||
|
|
return 0;
|
|||
|
|
};
|
|||
|
|
function _gray_to_rgba(compG_ptr, nb_pixels) {
|
|||
|
|
compG_ptr >>= 2;
|
|||
|
|
const imageData = Module.imageData = new Uint8ClampedArray(nb_pixels * 4);
|
|||
|
|
const compG = HEAP32.subarray(compG_ptr, compG_ptr + nb_pixels);
|
|||
|
|
for (let i = 0; i < nb_pixels; i++) {
|
|||
|
|
imageData[4 * i] = imageData[4 * i + 1] = imageData[4 * i + 2] = compG[i];
|
|||
|
|
imageData[4 * i + 3] = 255;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function _graya_to_rgba(compG_ptr, compA_ptr, nb_pixels) {
|
|||
|
|
compG_ptr >>= 2;
|
|||
|
|
compA_ptr >>= 2;
|
|||
|
|
const imageData = Module.imageData = new Uint8ClampedArray(nb_pixels * 4);
|
|||
|
|
const compG = HEAP32.subarray(compG_ptr, compG_ptr + nb_pixels);
|
|||
|
|
const compA = HEAP32.subarray(compA_ptr, compA_ptr + nb_pixels);
|
|||
|
|
for (let i = 0; i < nb_pixels; i++) {
|
|||
|
|
imageData[4 * i] = imageData[4 * i + 1] = imageData[4 * i + 2] = compG[i];
|
|||
|
|
imageData[4 * i + 3] = compA[i];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function _jsPrintWarning(message_ptr) {
|
|||
|
|
const message = UTF8ToString(message_ptr);
|
|||
|
|
(Module.warn || console.warn)(`OpenJPEG: ${message}`);
|
|||
|
|
}
|
|||
|
|
function _rgb_to_rgba(compR_ptr, compG_ptr, compB_ptr, nb_pixels) {
|
|||
|
|
compR_ptr >>= 2;
|
|||
|
|
compG_ptr >>= 2;
|
|||
|
|
compB_ptr >>= 2;
|
|||
|
|
const imageData = Module.imageData = new Uint8ClampedArray(nb_pixels * 4);
|
|||
|
|
const compR = HEAP32.subarray(compR_ptr, compR_ptr + nb_pixels);
|
|||
|
|
const compG = HEAP32.subarray(compG_ptr, compG_ptr + nb_pixels);
|
|||
|
|
const compB = HEAP32.subarray(compB_ptr, compB_ptr + nb_pixels);
|
|||
|
|
for (let i = 0; i < nb_pixels; i++) {
|
|||
|
|
imageData[4 * i] = compR[i];
|
|||
|
|
imageData[4 * i + 1] = compG[i];
|
|||
|
|
imageData[4 * i + 2] = compB[i];
|
|||
|
|
imageData[4 * i + 3] = 255;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function _storeErrorMessage(message_ptr) {
|
|||
|
|
const message = UTF8ToString(message_ptr);
|
|||
|
|
if (!Module.errorMessages) {
|
|||
|
|
Module.errorMessages = message;
|
|||
|
|
} else {
|
|||
|
|
Module.errorMessages += "\n" + message;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
var writeArrayToMemory = (array, buffer) => {
|
|||
|
|
HEAP8.set(array, buffer);
|
|||
|
|
};
|
|||
|
|
if (Module["noExitRuntime"]) noExitRuntime = Module["noExitRuntime"];
|
|||
|
|
if (Module["print"]) out = Module["print"];
|
|||
|
|
if (Module["printErr"]) err = Module["printErr"];
|
|||
|
|
if (Module["wasmBinary"]) wasmBinary = Module["wasmBinary"];
|
|||
|
|
if (Module["arguments"]) arguments_ = Module["arguments"];
|
|||
|
|
if (Module["thisProgram"]) thisProgram = Module["thisProgram"];
|
|||
|
|
Module["writeArrayToMemory"] = writeArrayToMemory;
|
|||
|
|
var wasmImports = {
|
|||
|
|
l: __abort_js,
|
|||
|
|
k: __emscripten_runtime_keepalive_clear,
|
|||
|
|
m: __setitimer_js,
|
|||
|
|
g: _copy_pixels_1,
|
|||
|
|
f: _copy_pixels_3,
|
|||
|
|
e: _copy_pixels_4,
|
|||
|
|
n: _emscripten_resize_heap,
|
|||
|
|
p: _environ_get,
|
|||
|
|
q: _environ_sizes_get,
|
|||
|
|
b: _fd_close,
|
|||
|
|
o: _fd_seek,
|
|||
|
|
c: _fd_write,
|
|||
|
|
r: _gray_to_rgba,
|
|||
|
|
i: _graya_to_rgba,
|
|||
|
|
d: _jsPrintWarning,
|
|||
|
|
j: _proc_exit,
|
|||
|
|
h: _rgb_to_rgba,
|
|||
|
|
a: _storeErrorMessage
|
|||
|
|
};
|
|||
|
|
var wasmExports = await createWasm();
|
|||
|
|
var ___wasm_call_ctors = wasmExports["t"];
|
|||
|
|
var _malloc = Module["_malloc"] = wasmExports["u"];
|
|||
|
|
var _free = Module["_free"] = wasmExports["v"];
|
|||
|
|
var _jp2_decode = Module["_jp2_decode"] = wasmExports["w"];
|
|||
|
|
var __emscripten_timeout = wasmExports["x"];
|
|||
|
|
function run() {
|
|||
|
|
if (runDependencies > 0) {
|
|||
|
|
dependenciesFulfilled = run;
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
preRun();
|
|||
|
|
if (runDependencies > 0) {
|
|||
|
|
dependenciesFulfilled = run;
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
function doRun() {
|
|||
|
|
Module["calledRun"] = true;
|
|||
|
|
if (ABORT) return;
|
|||
|
|
initRuntime();
|
|||
|
|
readyPromiseResolve(Module);
|
|||
|
|
Module["onRuntimeInitialized"]?.();
|
|||
|
|
postRun();
|
|||
|
|
}
|
|||
|
|
if (Module["setStatus"]) {
|
|||
|
|
Module["setStatus"]("Running...");
|
|||
|
|
setTimeout(() => {
|
|||
|
|
setTimeout(() => Module["setStatus"](""), 1);
|
|||
|
|
doRun();
|
|||
|
|
}, 1);
|
|||
|
|
} else {
|
|||
|
|
doRun();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function preInit() {
|
|||
|
|
if (Module["preInit"]) {
|
|||
|
|
if (typeof Module["preInit"] == "function") Module["preInit"] = [Module["preInit"]];
|
|||
|
|
while (Module["preInit"].length > 0) {
|
|||
|
|
Module["preInit"].shift()();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
preInit();
|
|||
|
|
run();
|
|||
|
|
moduleRtn = readyPromise;
|
|||
|
|
return moduleRtn;
|
|||
|
|
};
|
|||
|
|
})();
|
|||
|
|
/* harmony default export */ const openjpeg = (OpenJPEG);
|
|||
|
|
;// ./src/core/stream.js
|
|||
|
|
|
|||
|
|
|
|||
|
|
class Stream extends base_stream_BaseStream {
|
|||
|
|
constructor(arrayBuffer, start, length, dict) {
|
|||
|
|
super();
|
|||
|
|
this.bytes = arrayBuffer instanceof Uint8Array ? arrayBuffer : new Uint8Array(arrayBuffer);
|
|||
|
|
this.start = start || 0;
|
|||
|
|
this.pos = this.start;
|
|||
|
|
this.end = start + length || this.bytes.length;
|
|||
|
|
this.dict = dict;
|
|||
|
|
}
|
|||
|
|
get length() {
|
|||
|
|
return this.end - this.start;
|
|||
|
|
}
|
|||
|
|
get isEmpty() {
|
|||
|
|
return this.length === 0;
|
|||
|
|
}
|
|||
|
|
getByte() {
|
|||
|
|
if (this.pos >= this.end) {
|
|||
|
|
return -1;
|
|||
|
|
}
|
|||
|
|
return this.bytes[this.pos++];
|
|||
|
|
}
|
|||
|
|
getBytes(length) {
|
|||
|
|
const bytes = this.bytes;
|
|||
|
|
const pos = this.pos;
|
|||
|
|
const strEnd = this.end;
|
|||
|
|
if (!length) {
|
|||
|
|
return bytes.subarray(pos, strEnd);
|
|||
|
|
}
|
|||
|
|
let end = pos + length;
|
|||
|
|
if (end > strEnd) {
|
|||
|
|
end = strEnd;
|
|||
|
|
}
|
|||
|
|
this.pos = end;
|
|||
|
|
return bytes.subarray(pos, end);
|
|||
|
|
}
|
|||
|
|
getByteRange(begin, end) {
|
|||
|
|
if (begin < 0) {
|
|||
|
|
begin = 0;
|
|||
|
|
}
|
|||
|
|
if (end > this.end) {
|
|||
|
|
end = this.end;
|
|||
|
|
}
|
|||
|
|
return this.bytes.subarray(begin, end);
|
|||
|
|
}
|
|||
|
|
reset() {
|
|||
|
|
this.pos = this.start;
|
|||
|
|
}
|
|||
|
|
moveStart() {
|
|||
|
|
this.start = this.pos;
|
|||
|
|
}
|
|||
|
|
makeSubStream(start, length, dict = null) {
|
|||
|
|
return new Stream(this.bytes.buffer, start, length, dict);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class StringStream extends Stream {
|
|||
|
|
constructor(str) {
|
|||
|
|
super(stringToBytes(str));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class NullStream extends Stream {
|
|||
|
|
constructor() {
|
|||
|
|
super(new Uint8Array(0));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./src/core/jpx.js
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
class JpxError extends BaseException {
|
|||
|
|
constructor(msg) {
|
|||
|
|
super(msg, "JpxError");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
class JpxImage {
|
|||
|
|
static #buffer = null;
|
|||
|
|
static #handler = null;
|
|||
|
|
static #modulePromise = null;
|
|||
|
|
static #useWasm = true;
|
|||
|
|
static #useWorkerFetch = true;
|
|||
|
|
static #wasmUrl = null;
|
|||
|
|
static setOptions({
|
|||
|
|
handler,
|
|||
|
|
useWasm,
|
|||
|
|
useWorkerFetch,
|
|||
|
|
wasmUrl
|
|||
|
|
}) {
|
|||
|
|
this.#useWasm = useWasm;
|
|||
|
|
this.#useWorkerFetch = useWorkerFetch;
|
|||
|
|
this.#wasmUrl = wasmUrl;
|
|||
|
|
if (!useWorkerFetch) {
|
|||
|
|
this.#handler = handler;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
static async #getJsModule(fallbackCallback) {
|
|||
|
|
const path = `${this.#wasmUrl}openjpeg_nowasm_fallback.js`;
|
|||
|
|
let instance = null;
|
|||
|
|
try {
|
|||
|
|
const mod = await import(
|
|||
|
|
/*webpackIgnore: true*/
|
|||
|
|
/*@vite-ignore*/
|
|||
|
|
path);
|
|||
|
|
instance = mod.default();
|
|||
|
|
} catch (e) {
|
|||
|
|
util_warn(`JpxImage#getJsModule: ${e}`);
|
|||
|
|
}
|
|||
|
|
fallbackCallback(instance);
|
|||
|
|
}
|
|||
|
|
static async #instantiateWasm(fallbackCallback, imports, successCallback) {
|
|||
|
|
const filename = "openjpeg.wasm";
|
|||
|
|
try {
|
|||
|
|
if (!this.#buffer) {
|
|||
|
|
if (this.#useWorkerFetch) {
|
|||
|
|
this.#buffer = await fetchBinaryData(`${this.#wasmUrl}${filename}`);
|
|||
|
|
} else {
|
|||
|
|
this.#buffer = await this.#handler.sendWithPromise("FetchBinaryData", {
|
|||
|
|
type: "wasmFactory",
|
|||
|
|
filename
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
const results = await WebAssembly.instantiate(this.#buffer, imports);
|
|||
|
|
return successCallback(results.instance);
|
|||
|
|
} catch (reason) {
|
|||
|
|
util_warn(`JpxImage#instantiateWasm: ${reason}`);
|
|||
|
|
this.#getJsModule(fallbackCallback);
|
|||
|
|
return null;
|
|||
|
|
} finally {
|
|||
|
|
this.#handler = null;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
static async decode(bytes, {
|
|||
|
|
numComponents = 4,
|
|||
|
|
isIndexedColormap = false,
|
|||
|
|
smaskInData = false,
|
|||
|
|
reducePower = 0
|
|||
|
|
} = {}) {
|
|||
|
|
if (!this.#modulePromise) {
|
|||
|
|
const {
|
|||
|
|
promise,
|
|||
|
|
resolve
|
|||
|
|
} = Promise.withResolvers();
|
|||
|
|
const promises = [promise];
|
|||
|
|
if (!this.#useWasm) {
|
|||
|
|
this.#getJsModule(resolve);
|
|||
|
|
} else {
|
|||
|
|
promises.push(openjpeg({
|
|||
|
|
warn: util_warn,
|
|||
|
|
instantiateWasm: this.#instantiateWasm.bind(this, resolve)
|
|||
|
|
}));
|
|||
|
|
}
|
|||
|
|
this.#modulePromise = Promise.race(promises);
|
|||
|
|
}
|
|||
|
|
const module = await this.#modulePromise;
|
|||
|
|
if (!module) {
|
|||
|
|
throw new JpxError("OpenJPEG failed to initialize");
|
|||
|
|
}
|
|||
|
|
let ptr;
|
|||
|
|
try {
|
|||
|
|
const size = bytes.length;
|
|||
|
|
ptr = module._malloc(size);
|
|||
|
|
module.writeArrayToMemory(bytes, ptr);
|
|||
|
|
const ret = module._jp2_decode(ptr, size, numComponents > 0 ? numComponents : 0, !!isIndexedColormap, !!smaskInData, reducePower);
|
|||
|
|
if (ret) {
|
|||
|
|
const {
|
|||
|
|
errorMessages
|
|||
|
|
} = module;
|
|||
|
|
if (errorMessages) {
|
|||
|
|
delete module.errorMessages;
|
|||
|
|
throw new JpxError(errorMessages);
|
|||
|
|
}
|
|||
|
|
throw new JpxError("Unknown error");
|
|||
|
|
}
|
|||
|
|
const {
|
|||
|
|
imageData
|
|||
|
|
} = module;
|
|||
|
|
module.imageData = null;
|
|||
|
|
return imageData;
|
|||
|
|
} finally {
|
|||
|
|
if (ptr) {
|
|||
|
|
module._free(ptr);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
static cleanup() {
|
|||
|
|
this.#modulePromise = null;
|
|||
|
|
}
|
|||
|
|
static parseImageProperties(stream) {
|
|||
|
|
if (stream instanceof ArrayBuffer || ArrayBuffer.isView(stream)) {
|
|||
|
|
stream = new Stream(stream);
|
|||
|
|
} else {
|
|||
|
|
throw new JpxError("Invalid data format, must be a TypedArray.");
|
|||
|
|
}
|
|||
|
|
let newByte = stream.getByte();
|
|||
|
|
while (newByte >= 0) {
|
|||
|
|
const oldByte = newByte;
|
|||
|
|
newByte = stream.getByte();
|
|||
|
|
const code = oldByte << 8 | newByte;
|
|||
|
|
if (code === 0xff51) {
|
|||
|
|
stream.skip(4);
|
|||
|
|
const Xsiz = stream.getInt32() >>> 0;
|
|||
|
|
const Ysiz = stream.getInt32() >>> 0;
|
|||
|
|
const XOsiz = stream.getInt32() >>> 0;
|
|||
|
|
const YOsiz = stream.getInt32() >>> 0;
|
|||
|
|
stream.skip(16);
|
|||
|
|
const Csiz = stream.getUint16();
|
|||
|
|
return {
|
|||
|
|
width: Xsiz - XOsiz,
|
|||
|
|
height: Ysiz - YOsiz,
|
|||
|
|
bitsPerComponent: 8,
|
|||
|
|
componentsCount: Csiz
|
|||
|
|
};
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
throw new JpxError("No size marker found in JPX stream");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
;// ./src/pdf.image_decoders.js
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
globalThis.pdfjsImageDecoders = {
|
|||
|
|
getVerbosityLevel: getVerbosityLevel,
|
|||
|
|
Jbig2Error: Jbig2Error,
|
|||
|
|
Jbig2Image: Jbig2Image,
|
|||
|
|
JpegError: JpegError,
|
|||
|
|
JpegImage: JpegImage,
|
|||
|
|
JpxError: JpxError,
|
|||
|
|
JpxImage: JpxImage,
|
|||
|
|
setVerbosityLevel: setVerbosityLevel,
|
|||
|
|
VerbosityLevel: VerbosityLevel
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
export { Jbig2Error, Jbig2Image, JpegError, JpegImage, JpxError, JpxImage, VerbosityLevel, getVerbosityLevel, setVerbosityLevel };
|
|||
|
|
|
|||
|
|
//# sourceMappingURL=pdf.image_decoders.mjs.map
|