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| /*!
* Based on https://github.com/exif-js/exif-js by Jacob Seidelin
* Licensed under MIT
*/
/*
* Photo Editor SDK - photoeditorsdk.com
* Copyright (c) 2013-2015 9elements GmbH
*
* Released under Attribution-NonCommercial 3.0 Unported
* http://creativecommons.org/licenses/by-nc/3.0/
*
* For commercial use, please contact us at contact@9elements.com
*/
'use strict';
Object.defineProperty(exports, '__esModule', {
value: true
});
// istanbul ignore next
var _slicedToArray = (function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i['return']) _i['return'](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError('Invalid attempt to destructure non-iterable instance'); } }; })();
// istanbul ignore next
var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; Eif ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { Eif (protoProps) defineProperties(Constructor.prototype, protoProps); Eif (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();
// istanbul ignore next
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
// istanbul ignore next
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }
var _base64 = require('./base64');
var _base642 = _interopRequireDefault(_base64);
var _arrayStream = require('./array-stream');
var _arrayStream2 = _interopRequireDefault(_arrayStream);
var EXIF_TAGS = {
0x0100: 'ImageWidth',
0x0101: 'ImageHeight',
0x8769: 'ExifIFDPointer',
0x8825: 'GPSInfoIFDPointer',
0xA005: 'InteroperabilityIFDPointer',
0x0102: 'BitsPerSample',
0x0103: 'Compression',
0x0106: 'PhotometricInterpretation',
0x0112: 'Orientation',
0x0115: 'SamplesPerPixel',
0x011C: 'PlanarConfiguration',
0x0212: 'YCbCrSubSampling',
0x0213: 'YCbCrPositioning',
0x011A: 'XResolution',
0x011B: 'YResolution',
0x0128: 'ResolutionUnit',
0x0111: 'StripOffsets',
0x0116: 'RowsPerStrip',
0x0117: 'StripByteCounts',
0x0201: 'JPEGInterchangeFormat',
0x0202: 'JPEGInterchangeFormatLength',
0x012D: 'TransferFunction',
0x013E: 'WhitePoint',
0x013F: 'PrimaryChromaticities',
0x0211: 'YCbCrCoefficients',
0x0214: 'ReferenceBlackWhite',
0x0132: 'DateTime',
0x010E: 'ImageDescription',
0x010F: 'Make',
0x0110: 'Model',
0x0131: 'Software',
0x013B: 'Artist',
0x8298: 'Copyright'
};
var DATA_JPEG_PREFIX = 'data:image/jpeg;base64,';
var JPEG_REGEX = new RegExp('^' + DATA_JPEG_PREFIX, 'i');
var Exif = (function () {
function Exif(buf) {
_classCallCheck(this, Exif);
this._buf = buf;
this._stream = new _arrayStream2['default'](this._buf);
this._stream.setHead(0);
this._segments = this._sliceIntoSegments(this._buf);
this._exifBuffer = this._getExifBuffer();
this._exifStream = new _arrayStream2['default'](this._exifBuffer);
this._parseExif();
}
_createClass(Exif, [{
key: 'getTags',
value: function getTags() {
return this._tags;
}
}, {
key: 'getTagData',
value: function getTagData() {
return this._tagData;
}
/**
* Restores the exif tags into the given data url
* @return {String} base64String
*/
}, {
key: 'restoreExifTags',
value: function restoreExifTags(base64String) {
// First, make the given string a data array
var raw = base64String.replace(DATA_JPEG_PREFIX, '');
var data = _base642['default'].decode(raw);
var segments = this._sliceIntoSegments(data);
var _segments$1 = _slicedToArray(segments[1], 2);
var segmentStart = _segments$1[0];
var segmentEnd = _segments$1[1];
var dataBefore = data.slice(0, segmentStart);
var dataAfter = data.slice(segmentStart);
var newData = dataBefore.concat(this._exifBuffer);
newData = newData.concat(dataAfter);
// Make it a base64 string again
return DATA_JPEG_PREFIX + _base642['default'].encode(newData);
}
/**
* Overwrites the orientation with the given 16 bit integer
* @param {Number} orientation
*/
}, {
key: 'setOrientation',
value: function setOrientation(orientation) {
if (this._tagData.Orientation) {
var entryOffset = this._tagData.Orientation.entryOffset;
// Replace value in buffer
this._exifStream.setHead(entryOffset + 8);
this._exifStream.writeInt16(orientation);
}
}
/**
* Checks whether the given base64 data url is a jpeg image
* @param {String} base64String
* @return {Boolean}
*/
}, {
key: '_parseExif',
/**
* Parses the exif tags
* @return {Object}
* @private
*/
value: function _parseExif() {
this._exifStream.setHead(0);
// Skip marker
this._exifStream.readInt16();
// Skip length
this._exifStream.readInt16();
var header = this._exifStream.readString(4);
if (header !== 'Exif') {
return;
}
// Skip 2 bytes
this._exifStream.readInt16();
var tiffOffset = this._exifStream.getHead();
// Find endian type
var bigEndian = false;
var endian = this._exifStream.readInt16();
if (endian === 0x4949) {
bigEndian = false;
} else if (endian === 0x4d4d) {
bigEndian = true;
} else {
throw new Error('Invalid TIFF data: No endian type found');
}
if (this._exifStream.readInt16(!bigEndian) !== 0x002A) {
throw new Error('Invalid TIFF data: No 0x002A');
}
var firstIFDOffset = this._exifStream.readInt32(!bigEndian);
if (firstIFDOffset < 8) {
throw new Error('Invalid TIFF data: First IFD offset < 8');
}
var ifdOffset = tiffOffset + firstIFDOffset;
var tags = this._readTags(this._exifStream, tiffOffset, ifdOffset, bigEndian);
this._tags = tags.tags;
this._tagData = tags.tagData;
}
/**
* Reads the TIFF tags from the stream
* @param {ArrayBuffer} stream
* @param {Number} tiffStart The position where tiff data starts
* @param {Number} ifdStart The position where the IFD starts
* @param {Boolean} bigEndian
* @return {Object}
* @private
*/
}, {
key: '_readTags',
value: function _readTags(stream, tiffStart, ifdStart, bigEndian) {
stream.setHead(ifdStart);
var entriesCount = stream.readInt16(!bigEndian);
var tags = {};
var tagData = [];
for (var i = 0; i < entriesCount; i++) {
var entryOffset = ifdStart + i * 12 + 2;
stream.setHead(entryOffset);
var tag = stream.readInt16(!bigEndian);
var type = undefined;
var numValues = undefined;
var valueOffset = undefined;
if (EXIF_TAGS[tag]) {
tag = EXIF_TAGS[tag];
type = stream.readInt16(!bigEndian);
numValues = stream.readInt32(!bigEndian);
valueOffset = stream.readInt32(!bigEndian) + tiffStart;
var value = null;
switch (type) {
case 1: // byte, 8-bit unsigned int
case 7:
// undefined, 8-bit byte, value depending on field
if (numValues === 1) {
value = stream.readInt8(!bigEndian);
} else {
value = [];
for (var _i = 0; _i < numValues; _i++) {
value.push(stream.readInt8(!bigEndian));
}
}
break;
case 2:
// 8-bit ascii char
stream.setHead(numValues > 4 ? valueOffset : entryOffset + 8);
value = stream.readString(numValues);
break;
case 3:
// short
stream.setHead(numValues > 2 ? valueOffset : entryOffset + 8);
if (numValues === 1) {
value = stream.readInt16(!bigEndian);
} else {
value = [];
for (var _i2 = 0; _i2 < numValues; _i2++) {
value.push(stream.readInt16(!bigEndian));
}
}
break;
case 4: // long
case 9:
// slong
stream.setHead(numValues > 1 ? valueOffset : entryOffset + 8);
if (numValues === 1) {
value = stream.readInt32(!bigEndian);
} else {
value = [];
for (var _i3 = 0; _i3 < numValues; _i3++) {
value.push(stream.readInt32(!bigEndian));
}
}
break;
case 5: // rational (two long values, first numerator, second denominator)
case 10:
// rational (two slongs)
stream.setHead(valueOffset);
if (numValues === 1) {
var numerator = stream.readInt32(!bigEndian);
var denominator = stream.readInt32(!bigEndian);
value = numerator / denominator;
} else {
value = [];
for (var _i4 = 0; _i4 < numValues; _i4++) {
var numerator = stream.readInt32(!bigEndian);
var denominator = stream.readInt32(!bigEndian);
var val = numerator / denominator;
value.push(val);
}
}
break;
}
tags[tag] = value;
tagData[tag] = {
value: value,
numValues: numValues,
entryOffset: entryOffset,
valueOffset: valueOffset,
type: type
};
}
}
return { tags: tags, tagData: tagData };
}
/**
* Returns a new buffer containing the Exif segment
* @return {Array}
* @private
*/
}, {
key: '_getExifBuffer',
value: function _getExifBuffer() {
var segments = this._segments;
for (var i = 0; i < segments.length; i++) {
var _segments$i = _slicedToArray(segments[i], 2);
var offset = _segments$i[0];
var end = _segments$i[1];
this._stream.setHead(offset);
var marker = this._stream.peekInt16();
if (marker === 0xffe1) {
return this._buf.slice(offset, end);
}
}
return false;
}
/**
* Slices the array into segments
* @param {Array.<Number>} buf
* @return {Array}
* @private
*/
}, {
key: '_sliceIntoSegments',
value: function _sliceIntoSegments(buf) {
var stream = new _arrayStream2['default'](buf);
var segments = [];
while (stream.getHead() < buf.length) {
var marker = stream.readInt16();
if (marker === 0xffd8) {
continue;
} // SOI
if (marker === 0xffda) {
break;
} // SOS Marker
if (marker >= 0xff00 && marker <= 0xffff) {
// Marker (FF-XX-HL-LL)
var _length = stream.readInt16();
var end = stream.getHead() + _length - 2;
segments.push([stream.getHead() - 4, end]);
stream.setHead(end);
} else {
throw new Error('Invalid marker: 0x' + marker.toString(16));
}
}
this._stream.setHead(0);
return segments;
}
}, {
key: 'dispose',
value: function dispose() {
this._buf = [];
this._exifBuffer = [];
this._segments = [];
}
}], [{
key: 'isJPEG',
value: function isJPEG(base64String) {
return JPEG_REGEX.test(base64String);
}
/**
* Creates a new instance of Exif from the given base64-encoded
* string
* @param {String} base64String
* @return {Exif}
*/
}, {
key: 'fromBase64String',
value: function fromBase64String(base64String) {
var raw = base64String.replace(DATA_JPEG_PREFIX, '');
var data = _base642['default'].decode(raw);
return new Exif(data);
}
}]);
return Exif;
})();
exports['default'] = Exif;
module.exports = exports['default'];
//# 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* Based on https://github.com/exif-js/exif-js by Jacob Seidelin\n * Licensed under MIT\n */\n\n/*\n * Photo Editor SDK - photoeditorsdk.com\n * Copyright (c) 2013-2015 9elements GmbH\n *\n * Released under Attribution-NonCommercial 3.0 Unported\n * http://creativecommons.org/licenses/by-nc/3.0/\n *\n * For commercial use, please contact us at contact@9elements.com\n */\n\nimport Base64 from './base64'\n\nconst EXIF_TAGS = {\n  0x0100 : 'ImageWidth',\n  0x0101 : 'ImageHeight',\n  0x8769 : 'ExifIFDPointer',\n  0x8825 : 'GPSInfoIFDPointer',\n  0xA005 : 'InteroperabilityIFDPointer',\n  0x0102 : 'BitsPerSample',\n  0x0103 : 'Compression',\n  0x0106 : 'PhotometricInterpretation',\n  0x0112 : 'Orientation',\n  0x0115 : 'SamplesPerPixel',\n  0x011C : 'PlanarConfiguration',\n  0x0212 : 'YCbCrSubSampling',\n  0x0213 : 'YCbCrPositioning',\n  0x011A : 'XResolution',\n  0x011B : 'YResolution',\n  0x0128 : 'ResolutionUnit',\n  0x0111 : 'StripOffsets',\n  0x0116 : 'RowsPerStrip',\n  0x0117 : 'StripByteCounts',\n  0x0201 : 'JPEGInterchangeFormat',\n  0x0202 : 'JPEGInterchangeFormatLength',\n  0x012D : 'TransferFunction',\n  0x013E : 'WhitePoint',\n  0x013F : 'PrimaryChromaticities',\n  0x0211 : 'YCbCrCoefficients',\n  0x0214 : 'ReferenceBlackWhite',\n  0x0132 : 'DateTime',\n  0x010E : 'ImageDescription',\n  0x010F : 'Make',\n  0x0110 : 'Model',\n  0x0131 : 'Software',\n  0x013B : 'Artist',\n  0x8298 : 'Copyright'\n}\n\nconst DATA_JPEG_PREFIX = 'data:image/jpeg;base64,'\nconst JPEG_REGEX = new RegExp(`^${DATA_JPEG_PREFIX}`, 'i')\n\nimport ArrayStream from './array-stream'\n\nexport default class Exif {\n  constructor (buf) {\n    this._buf = buf\n    this._stream = new ArrayStream(this._buf)\n    this._stream.setHead(0)\n\n    this._segments = this._sliceIntoSegments(this._buf)\n    this._exifBuffer = this._getExifBuffer()\n    this._exifStream = new ArrayStream(this._exifBuffer)\n    this._parseExif()\n  }\n\n  getTags () { return this._tags }\n  getTagData () { return this._tagData }\n\n  /**\n   * Restores the exif tags into the given data url\n   * @return {String} base64String\n   */\n  restoreExifTags (base64String) {\n    // First, make the given string a data array\n    const raw = base64String.replace(DATA_JPEG_PREFIX, '')\n    const data = Base64.decode(raw)\n\n    const segments = this._sliceIntoSegments(data)\n    const [ segmentStart, segmentEnd ] = segments[1]\n    const dataBefore = data.slice(0, segmentStart)\n    const dataAfter = data.slice(segmentStart)\n\n    let newData = dataBefore.concat(this._exifBuffer)\n    newData = newData.concat(dataAfter)\n\n    // Make it a base64 string again\n    return DATA_JPEG_PREFIX + Base64.encode(newData)\n  }\n\n  /**\n   * Overwrites the orientation with the given 16 bit integer\n   * @param {Number} orientation\n   */\n  setOrientation (orientation) {\n    if (this._tagData.Orientation) {\n      const { entryOffset } = this._tagData.Orientation\n      // Replace value in buffer\n      this._exifStream.setHead(entryOffset + 8)\n      this._exifStream.writeInt16(orientation)\n    }\n  }\n\n  /**\n   * Checks whether the given base64 data url is a jpeg image\n   * @param  {String}  base64String\n   * @return {Boolean}\n   */\n  static isJPEG (base64String) {\n    return JPEG_REGEX.test(base64String)\n  }\n\n  /**\n   * Creates a new instance of Exif from the given base64-encoded\n   * string\n   * @param  {String} base64String\n   * @return {Exif}\n   */\n  static fromBase64String (base64String) {\n    const raw = base64String.replace(DATA_JPEG_PREFIX, '')\n    const data = Base64.decode(raw)\n    return new Exif(data)\n  }\n\n  /**\n   * Parses the exif tags\n   * @return {Object}\n   * @private\n   */\n  _parseExif () {\n    this._exifStream.setHead(0)\n    // Skip marker\n    this._exifStream.readInt16()\n    // Skip length\n    this._exifStream.readInt16()\n\n    const header = this._exifStream.readString(4)\n    if (header !== 'Exif') {\n      return\n    }\n\n    // Skip 2 bytes\n    this._exifStream.readInt16()\n\n    const tiffOffset = this._exifStream.getHead()\n\n    // Find endian type\n    let bigEndian = false\n    const endian = this._exifStream.readInt16()\n    if (endian === 0x4949) {\n      bigEndian = false\n    } else if (endian === 0x4d4d) {\n      bigEndian = true\n    } else {\n      throw new Error('Invalid TIFF data: No endian type found')\n    }\n\n    if (this._exifStream.readInt16(!bigEndian) !== 0x002A) {\n      throw new Error('Invalid TIFF data: No 0x002A')\n    }\n\n    const firstIFDOffset = this._exifStream.readInt32(!bigEndian)\n    if (firstIFDOffset < 8) {\n      throw new Error('Invalid TIFF data: First IFD offset < 8')\n    }\n\n    const ifdOffset = tiffOffset + firstIFDOffset\n    const tags = this._readTags(this._exifStream, tiffOffset, ifdOffset, bigEndian)\n    this._tags = tags.tags\n    this._tagData = tags.tagData\n  }\n\n  /**\n   * Reads the TIFF tags from the stream\n   * @param  {ArrayBuffer} stream\n   * @param  {Number} tiffStart The position where tiff data starts\n   * @param  {Number} ifdStart  The position where the IFD starts\n   * @param  {Boolean} bigEndian\n   * @return {Object}\n   * @private\n   */\n  _readTags (stream, tiffStart, ifdStart, bigEndian) {\n    stream.setHead(ifdStart)\n    const entriesCount = stream.readInt16(!bigEndian)\n    let tags = {}\n    let tagData = []\n\n    for (let i = 0; i < entriesCount; i++) {\n      const entryOffset = ifdStart + i*12 + 2\n      stream.setHead(entryOffset)\n      let tag = stream.readInt16(!bigEndian)\n      let type\n      let numValues\n      let valueOffset\n      if (EXIF_TAGS[tag]) {\n        tag = EXIF_TAGS[tag]\n        type = stream.readInt16(!bigEndian)\n        numValues = stream.readInt32(!bigEndian)\n        valueOffset = stream.readInt32(!bigEndian) + tiffStart\n        let value = null\n\n        switch (type) {\n          case 1: // byte, 8-bit unsigned int\n          case 7: // undefined, 8-bit byte, value depending on field\n            if (numValues === 1) {\n              value = stream.readInt8(!bigEndian)\n            } else {\n              value = []\n              for (let i = 0; i < numValues; i++) {\n                value.push(stream.readInt8(!bigEndian))\n              }\n            }\n            break\n          case 2: // 8-bit ascii char\n            stream.setHead(numValues > 4 ? valueOffset : (entryOffset + 8))\n            value = stream.readString(numValues)\n            break\n          case 3: // short\n            stream.setHead(numValues > 2 ? valueOffset : (entryOffset + 8))\n            if (numValues === 1) {\n              value = stream.readInt16(!bigEndian)\n            } else {\n              value = []\n              for (let i = 0; i < numValues; i++) {\n                value.push(stream.readInt16(!bigEndian))\n              }\n            }\n            break\n          case 4: // long\n          case 9: // slong\n            stream.setHead(numValues > 1 ? valueOffset : (entryOffset + 8))\n            if (numValues === 1) {\n              value = stream.readInt32(!bigEndian)\n            } else {\n              value = []\n              for (let i = 0; i < numValues; i++) {\n                value.push(stream.readInt32(!bigEndian))\n              }\n            }\n            break\n          case 5: // rational (two long values, first numerator, second denominator)\n          case 10: // rational (two slongs)\n            stream.setHead(valueOffset)\n            if (numValues === 1) {\n              const numerator = stream.readInt32(!bigEndian)\n              const denominator = stream.readInt32(!bigEndian)\n              value = numerator / denominator\n            } else {\n              value = []\n              for (let i = 0; i < numValues; i++) {\n                const numerator = stream.readInt32(!bigEndian)\n                const denominator = stream.readInt32(!bigEndian)\n                const val = numerator / denominator\n                value.push(val)\n              }\n            }\n            break\n        }\n\n        tags[tag] = value\n        tagData[tag] = {\n          value,\n          numValues,\n          entryOffset,\n          valueOffset,\n          type\n        }\n      }\n    }\n\n    return { tags, tagData }\n  }\n\n  /**\n   * Returns a new buffer containing the Exif segment\n   * @return {Array}\n   * @private\n   */\n  _getExifBuffer () {\n    const segments = this._segments\n    for (let i = 0; i < segments.length; i++) {\n      const [offset, end] = segments[i]\n      this._stream.setHead(offset)\n      const marker = this._stream.peekInt16()\n      if (marker === 0xffe1) {\n        return this._buf.slice(offset, end)\n      }\n    }\n    return false\n  }\n\n  /**\n   * Slices the array into segments\n   * @param  {Array.<Number>} buf\n   * @return {Array}\n   * @private\n   */\n  _sliceIntoSegments (buf) {\n    let stream = new ArrayStream(buf)\n    let segments = []\n    while (stream.getHead() < buf.length) {\n      const marker = stream.readInt16()\n      if (marker === 0xffd8) { continue } // SOI\n      if (marker === 0xffda) { break } // SOS Marker\n\n      if (marker >= 0xff00 && marker <= 0xffff) {\n        // Marker (FF-XX-HL-LL)\n        const length = stream.readInt16()\n        const end = stream.getHead() + length - 2\n        segments.push([stream.getHead() - 4, end])\n        stream.setHead(end)\n      } else {\n        throw new Error('Invalid marker: 0x' + marker.toString(16))\n      }\n    }\n\n    this._stream.setHead(0)\n\n    return segments\n  }\n\n  dispose () {\n    this._buf = []\n    this._exifBuffer = []\n    this._segments = []\n  }\n}\n"]} |