22 changed files with 6892 additions and 6729 deletions
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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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/* 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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