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65 lines
2.0 KiB
65 lines
2.0 KiB
7 years ago
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/* Copyright 2017 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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'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.CCITTFaxStream = undefined;
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var _primitives = require('./primitives');
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var _ccitt = require('./ccitt');
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var _stream = require('./stream');
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var CCITTFaxStream = function CCITTFaxStreamClosure() {
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function CCITTFaxStream(str, maybeLength, params) {
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this.str = str;
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this.dict = str.dict;
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if (!(0, _primitives.isDict)(params)) {
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params = _primitives.Dict.empty;
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}
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var source = {
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next: function next() {
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return str.getByte();
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}
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};
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this.ccittFaxDecoder = new _ccitt.CCITTFaxDecoder(source, {
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K: params.get('K'),
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EndOfLine: params.get('EndOfLine'),
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EncodedByteAlign: params.get('EncodedByteAlign'),
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Columns: params.get('Columns'),
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Rows: params.get('Rows'),
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EndOfBlock: params.get('EndOfBlock'),
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BlackIs1: params.get('BlackIs1')
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});
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_stream.DecodeStream.call(this, maybeLength);
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}
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CCITTFaxStream.prototype = Object.create(_stream.DecodeStream.prototype);
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CCITTFaxStream.prototype.readBlock = function () {
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while (!this.eof) {
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var c = this.ccittFaxDecoder.readNextChar();
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if (c === -1) {
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this.eof = true;
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return;
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}
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this.ensureBuffer(this.bufferLength + 1);
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this.buffer[this.bufferLength++] = c;
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}
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};
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return CCITTFaxStream;
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}();
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exports.CCITTFaxStream = CCITTFaxStream;
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