pdfjsbot
8 years ago
22 changed files with 6892 additions and 6729 deletions
File diff suppressed because one or more lines are too long
File diff suppressed because one or more lines are too long
File diff suppressed because one or more lines are too long
File diff suppressed because one or more lines are too long
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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.JpegStream = undefined; |
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var _util = require('../shared/util'); |
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var _stream = require('./stream'); |
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var _primitives = require('./primitives'); |
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var _jpg = require('./jpg'); |
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var JpegStream = function JpegStreamClosure() { |
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function JpegStream(stream, maybeLength, dict, params) { |
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var ch = void 0; |
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while ((ch = stream.getByte()) !== -1) { |
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if (ch === 0xFF) { |
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stream.skip(-1); |
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break; |
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} |
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} |
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this.stream = stream; |
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this.maybeLength = maybeLength; |
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this.dict = dict; |
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this.params = params; |
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_stream.DecodeStream.call(this, maybeLength); |
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} |
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JpegStream.prototype = Object.create(_stream.DecodeStream.prototype); |
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Object.defineProperty(JpegStream.prototype, 'bytes', { |
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get: function JpegStream_bytes() { |
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return (0, _util.shadow)(this, 'bytes', this.stream.getBytes(this.maybeLength)); |
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}, |
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configurable: true |
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}); |
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JpegStream.prototype.ensureBuffer = function (requested) {}; |
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JpegStream.prototype.readBlock = function () { |
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if (this.eof) { |
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return; |
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} |
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var jpegImage = new _jpg.JpegImage(); |
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var decodeArr = this.dict.getArray('Decode', 'D'); |
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if (this.forceRGB && Array.isArray(decodeArr)) { |
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var bitsPerComponent = this.dict.get('BitsPerComponent') || 8; |
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var decodeArrLength = decodeArr.length; |
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var transform = new Int32Array(decodeArrLength); |
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var transformNeeded = false; |
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var maxValue = (1 << bitsPerComponent) - 1; |
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for (var i = 0; i < decodeArrLength; i += 2) { |
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transform[i] = (decodeArr[i + 1] - decodeArr[i]) * 256 | 0; |
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transform[i + 1] = decodeArr[i] * maxValue | 0; |
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if (transform[i] !== 256 || transform[i + 1] !== 0) { |
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transformNeeded = true; |
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} |
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} |
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if (transformNeeded) { |
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jpegImage.decodeTransform = transform; |
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} |
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} |
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if ((0, _primitives.isDict)(this.params)) { |
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var colorTransform = this.params.get('ColorTransform'); |
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if (Number.isInteger(colorTransform)) { |
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jpegImage.colorTransform = colorTransform; |
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} |
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} |
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jpegImage.parse(this.bytes); |
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var data = jpegImage.getData(this.drawWidth, this.drawHeight, this.forceRGB); |
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this.buffer = data; |
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this.bufferLength = data.length; |
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this.eof = true; |
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}; |
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JpegStream.prototype.getBytes = function (length) { |
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this.readBlock(); |
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return this.buffer; |
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}; |
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JpegStream.prototype.getIR = function () { |
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var forceDataSchema = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false; |
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return (0, _util.createObjectURL)(this.bytes, 'image/jpeg', forceDataSchema); |
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}; |
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return JpegStream; |
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}(); |
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exports.JpegStream = JpegStream; |
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@@ -0,0 +1,83 @@
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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.JpxStream = undefined; |
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var _stream = require('./stream'); |
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var _jpx = require('./jpx'); |
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var _util = require('../shared/util'); |
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var JpxStream = function JpxStreamClosure() { |
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function JpxStream(stream, maybeLength, dict, params) { |
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this.stream = stream; |
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this.maybeLength = maybeLength; |
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this.dict = dict; |
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this.params = params; |
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_stream.DecodeStream.call(this, maybeLength); |
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} |
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JpxStream.prototype = Object.create(_stream.DecodeStream.prototype); |
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Object.defineProperty(JpxStream.prototype, 'bytes', { |
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get: function JpxStream_bytes() { |
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return (0, _util.shadow)(this, 'bytes', this.stream.getBytes(this.maybeLength)); |
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}, |
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configurable: true |
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}); |
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JpxStream.prototype.ensureBuffer = function (requested) {}; |
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JpxStream.prototype.readBlock = function () { |
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if (this.eof) { |
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return; |
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} |
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var jpxImage = new _jpx.JpxImage(); |
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jpxImage.parse(this.bytes); |
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var width = jpxImage.width; |
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var height = jpxImage.height; |
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var componentsCount = jpxImage.componentsCount; |
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var tileCount = jpxImage.tiles.length; |
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if (tileCount === 1) { |
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this.buffer = jpxImage.tiles[0].items; |
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} else { |
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var data = new Uint8ClampedArray(width * height * componentsCount); |
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for (var k = 0; k < tileCount; k++) { |
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var tileComponents = jpxImage.tiles[k]; |
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var tileWidth = tileComponents.width; |
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var tileHeight = tileComponents.height; |
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var tileLeft = tileComponents.left; |
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var tileTop = tileComponents.top; |
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var src = tileComponents.items; |
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var srcPosition = 0; |
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var dataPosition = (width * tileTop + tileLeft) * componentsCount; |
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var imgRowSize = width * componentsCount; |
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var tileRowSize = tileWidth * componentsCount; |
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for (var j = 0; j < tileHeight; j++) { |
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var rowBytes = src.subarray(srcPosition, srcPosition + tileRowSize); |
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data.set(rowBytes, dataPosition); |
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srcPosition += tileRowSize; |
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dataPosition += imgRowSize; |
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} |
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} |
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this.buffer = data; |
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} |
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this.bufferLength = this.buffer.length; |
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this.eof = true; |
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}; |
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return JpxStream; |
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}(); |
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exports.JpxStream = JpxStream; |
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