/**
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* @licstart The following is the entire license notice for the
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* JavaScript code in this page
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*
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* Copyright 2022 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @licend The above is the entire license notice for the
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* JavaScript code in this page
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*/
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.Jbig2Stream = void 0;
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var _base_stream = require("./base_stream.js");
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var _decode_stream = require("./decode_stream.js");
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var _primitives = require("./primitives.js");
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var _jbig = require("./jbig2.js");
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var _util = require("../shared/util.js");
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class Jbig2Stream extends _decode_stream.DecodeStream {
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constructor(stream, maybeLength, params) {
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super(maybeLength);
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this.stream = stream;
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this.dict = stream.dict;
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this.maybeLength = maybeLength;
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this.params = params;
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}
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get bytes() {
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return (0, _util.shadow)(this, "bytes", this.stream.getBytes(this.maybeLength));
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}
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ensureBuffer(requested) {}
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readBlock() {
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if (this.eof) {
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return;
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}
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const jbig2Image = new _jbig.Jbig2Image();
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const chunks = [];
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if (this.params instanceof _primitives.Dict) {
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const globalsStream = this.params.get("JBIG2Globals");
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if (globalsStream instanceof _base_stream.BaseStream) {
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const globals = globalsStream.getBytes();
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chunks.push({
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data: globals,
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start: 0,
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end: globals.length
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});
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}
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}
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chunks.push({
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data: this.bytes,
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start: 0,
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end: this.bytes.length
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});
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const data = jbig2Image.parseChunks(chunks);
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const dataLength = data.length;
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for (let i = 0; i < dataLength; i++) {
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data[i] ^= 0xff;
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}
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this.buffer = data;
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this.bufferLength = dataLength;
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this.eof = true;
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}
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}
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exports.Jbig2Stream = Jbig2Stream;
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