/** * @licstart The following is the entire license notice for the * JavaScript code in this page * * Copyright 2024 Mozilla Foundation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * @licend The above is the entire license notice for the * JavaScript code in this page */ /** * pdfjsVersion = 5.4.149 * pdfjsBuild = 9e2e9e209 */ /******/ // The require scope /******/ var __webpack_require__ = {}; /******/ /************************************************************************/ /******/ /* webpack/runtime/define property getters */ /******/ (() => { /******/ // define getter functions for harmony exports /******/ __webpack_require__.d = (exports, definition) => { /******/ for(var key in definition) { /******/ if(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) { /******/ Object.defineProperty(exports, key, { enumerable: true, get: definition[key] }); /******/ } /******/ } /******/ }; /******/ })(); /******/ /******/ /* webpack/runtime/hasOwnProperty shorthand */ /******/ (() => { /******/ __webpack_require__.o = (obj, prop) => (Object.prototype.hasOwnProperty.call(obj, prop)) /******/ })(); /******/ /************************************************************************/ var __webpack_exports__ = {}; ;// ./src/shared/util.js const isNodeJS = typeof process === "object" && process + "" === "[object process]" && !process.versions.nw && !(process.versions.electron && process.type && process.type !== "browser"); const FONT_IDENTITY_MATRIX = (/* unused pure expression or super */ null && ([0.001, 0, 0, 0.001, 0, 0])); const LINE_FACTOR = 1.35; const LINE_DESCENT_FACTOR = 0.35; const BASELINE_FACTOR = LINE_DESCENT_FACTOR / LINE_FACTOR; const RenderingIntentFlag = { ANY: 0x01, DISPLAY: 0x02, PRINT: 0x04, SAVE: 0x08, ANNOTATIONS_FORMS: 0x10, ANNOTATIONS_STORAGE: 0x20, ANNOTATIONS_DISABLE: 0x40, IS_EDITING: 0x80, OPLIST: 0x100 }; const AnnotationMode = { DISABLE: 0, ENABLE: 1, ENABLE_FORMS: 2, ENABLE_STORAGE: 3 }; const util_AnnotationEditorPrefix = "pdfjs_internal_editor_"; const AnnotationEditorType = { DISABLE: -1, NONE: 0, FREETEXT: 3, HIGHLIGHT: 9, STAMP: 13, INK: 15, POPUP: 16, SIGNATURE: 101, COMMENT: 102 }; const AnnotationEditorParamsType = { RESIZE: 1, CREATE: 2, FREETEXT_SIZE: 11, FREETEXT_COLOR: 12, FREETEXT_OPACITY: 13, INK_COLOR: 21, INK_THICKNESS: 22, INK_OPACITY: 23, HIGHLIGHT_COLOR: 31, HIGHLIGHT_THICKNESS: 32, HIGHLIGHT_FREE: 33, HIGHLIGHT_SHOW_ALL: 34, DRAW_STEP: 41 }; const PermissionFlag = { PRINT: 0x04, MODIFY_CONTENTS: 0x08, COPY: 0x10, MODIFY_ANNOTATIONS: 0x20, FILL_INTERACTIVE_FORMS: 0x100, COPY_FOR_ACCESSIBILITY: 0x200, ASSEMBLE: 0x400, PRINT_HIGH_QUALITY: 0x800 }; const TextRenderingMode = { FILL: 0, STROKE: 1, FILL_STROKE: 2, INVISIBLE: 3, FILL_ADD_TO_PATH: 4, STROKE_ADD_TO_PATH: 5, FILL_STROKE_ADD_TO_PATH: 6, ADD_TO_PATH: 7, FILL_STROKE_MASK: 3, ADD_TO_PATH_FLAG: 4 }; const util_ImageKind = { GRAYSCALE_1BPP: 1, RGB_24BPP: 2, RGBA_32BPP: 3 }; const AnnotationType = { TEXT: 1, LINK: 2, FREETEXT: 3, LINE: 4, SQUARE: 5, CIRCLE: 6, POLYGON: 7, POLYLINE: 8, HIGHLIGHT: 9, UNDERLINE: 10, SQUIGGLY: 11, STRIKEOUT: 12, STAMP: 13, CARET: 14, INK: 15, POPUP: 16, FILEATTACHMENT: 17, SOUND: 18, MOVIE: 19, WIDGET: 20, SCREEN: 21, PRINTERMARK: 22, TRAPNET: 23, WATERMARK: 24, THREED: 25, REDACT: 26 }; const AnnotationReplyType = { GROUP: "Group", REPLY: "R" }; const AnnotationFlag = { INVISIBLE: 0x01, HIDDEN: 0x02, PRINT: 0x04, NOZOOM: 0x08, NOROTATE: 0x10, NOVIEW: 0x20, READONLY: 0x40, LOCKED: 0x80, TOGGLENOVIEW: 0x100, LOCKEDCONTENTS: 0x200 }; const AnnotationFieldFlag = { READONLY: 0x0000001, REQUIRED: 0x0000002, NOEXPORT: 0x0000004, MULTILINE: 0x0001000, PASSWORD: 0x0002000, NOTOGGLETOOFF: 0x0004000, RADIO: 0x0008000, PUSHBUTTON: 0x0010000, COMBO: 0x0020000, EDIT: 0x0040000, SORT: 0x0080000, FILESELECT: 0x0100000, MULTISELECT: 0x0200000, DONOTSPELLCHECK: 0x0400000, DONOTSCROLL: 0x0800000, COMB: 0x1000000, RICHTEXT: 0x2000000, RADIOSINUNISON: 0x2000000, COMMITONSELCHANGE: 0x4000000 }; const AnnotationBorderStyleType = { SOLID: 1, DASHED: 2, BEVELED: 3, INSET: 4, UNDERLINE: 5 }; const AnnotationActionEventType = { E: "Mouse Enter", X: "Mouse Exit", D: "Mouse Down", U: "Mouse Up", Fo: "Focus", Bl: "Blur", PO: "PageOpen", PC: "PageClose", PV: "PageVisible", PI: "PageInvisible", K: "Keystroke", F: "Format", V: "Validate", C: "Calculate" }; const DocumentActionEventType = { WC: "WillClose", WS: "WillSave", DS: "DidSave", WP: "WillPrint", DP: "DidPrint" }; const PageActionEventType = { O: "PageOpen", C: "PageClose" }; const VerbosityLevel = { ERRORS: 0, WARNINGS: 1, INFOS: 5 }; const OPS = { dependency: 1, setLineWidth: 2, setLineCap: 3, setLineJoin: 4, setMiterLimit: 5, setDash: 6, setRenderingIntent: 7, setFlatness: 8, setGState: 9, save: 10, restore: 11, transform: 12, moveTo: 13, lineTo: 14, curveTo: 15, curveTo2: 16, curveTo3: 17, closePath: 18, rectangle: 19, stroke: 20, closeStroke: 21, fill: 22, eoFill: 23, fillStroke: 24, eoFillStroke: 25, closeFillStroke: 26, closeEOFillStroke: 27, endPath: 28, clip: 29, eoClip: 30, beginText: 31, endText: 32, setCharSpacing: 33, setWordSpacing: 34, setHScale: 35, setLeading: 36, setFont: 37, setTextRenderingMode: 38, setTextRise: 39, moveText: 40, setLeadingMoveText: 41, setTextMatrix: 42, nextLine: 43, showText: 44, showSpacedText: 45, nextLineShowText: 46, nextLineSetSpacingShowText: 47, setCharWidth: 48, setCharWidthAndBounds: 49, setStrokeColorSpace: 50, setFillColorSpace: 51, setStrokeColor: 52, setStrokeColorN: 53, setFillColor: 54, setFillColorN: 55, setStrokeGray: 56, setFillGray: 57, setStrokeRGBColor: 58, setFillRGBColor: 59, setStrokeCMYKColor: 60, setFillCMYKColor: 61, shadingFill: 62, beginInlineImage: 63, beginImageData: 64, endInlineImage: 65, paintXObject: 66, markPoint: 67, markPointProps: 68, beginMarkedContent: 69, beginMarkedContentProps: 70, endMarkedContent: 71, beginCompat: 72, endCompat: 73, paintFormXObjectBegin: 74, paintFormXObjectEnd: 75, beginGroup: 76, endGroup: 77, 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 : ${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], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 6], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7], [4, 7]]; const blackTable1 = [[-1, -1], [-1, -1], [12, ccittEOL], [12, ccittEOL], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [-1, -1], [11, 1792], [11, 1792], [11, 1792], [11, 1792], [12, 1984], [12, 1984], [12, 2048], [12, 2048], [12, 2112], [12, 2112], [12, 2176], [12, 2176], [12, 2240], [12, 2240], [12, 2304], [12, 2304], [11, 1856], [11, 1856], [11, 1856], [11, 1856], [11, 1920], [11, 1920], [11, 1920], [11, 1920], [12, 2368], [12, 2368], [12, 2432], [12, 2432], [12, 2496], [12, 2496], [12, 2560], [12, 2560], [10, 18], [10, 18], [10, 18], [10, 18], [10, 18], [10, 18], [10, 18], [10, 18], [12, 52], [12, 52], [13, 640], [13, 704], [13, 768], [13, 832], [12, 55], [12, 55], [12, 56], [12, 56], [13, 1280], [13, 1344], [13, 1408], [13, 1472], [12, 59], [12, 59], [12, 60], [12, 60], [13, 1536], [13, 1600], [11, 24], [11, 24], [11, 24], [11, 24], [11, 25], [11, 25], [11, 25], [11, 25], [13, 1664], [13, 1728], [12, 320], [12, 320], [12, 384], [12, 384], [12, 448], [12, 448], [13, 512], [13, 576], [12, 53], [12, 53], [12, 54], [12, 54], [13, 896], [13, 960], [13, 1024], [13, 1088], [13, 1152], [13, 1216], [10, 64], [10, 64], [10, 64], [10, 64], [10, 64], [10, 64], [10, 64], [10, 64]]; const blackTable2 = [[8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [8, 13], [11, 23], [11, 23], [12, 50], [12, 51], [12, 44], [12, 45], [12, 46], [12, 47], [12, 57], [12, 58], [12, 61], [12, 256], [10, 16], [10, 16], [10, 16], [10, 16], [10, 17], [10, 17], [10, 17], [10, 17], [12, 48], [12, 49], [12, 62], [12, 63], [12, 30], [12, 31], [12, 32], [12, 33], [12, 40], [12, 41], [11, 22], [11, 22], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [8, 14], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 10], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [7, 11], [9, 15], [9, 15], [9, 15], [9, 15], [9, 15], [9, 15], [9, 15], [9, 15], [12, 128], [12, 192], [12, 26], [12, 27], [12, 28], [12, 29], [11, 19], [11, 19], [11, 20], [11, 20], [12, 34], [12, 35], [12, 36], [12, 37], [12, 38], [12, 39], [11, 21], [11, 21], [12, 42], [12, 43], [10, 0], [10, 0], [10, 0], [10, 0], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12], [7, 12]]; const blackTable3 = [[-1, -1], [-1, -1], [-1, -1], [-1, -1], [6, 9], [6, 8], [5, 7], [5, 7], [4, 6], [4, 6], [4, 6], [4, 6], [4, 5], [4, 5], [4, 5], [4, 5], [3, 1], [3, 1], [3, 1], [3, 1], [3, 1], [3, 1], [3, 1], [3, 1], [3, 4], [3, 4], [3, 4], [3, 4], [3, 4], [3, 4], [3, 4], [3, 4], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 3], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2], [2, 2]]; 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