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@@ -1,957 +0,0 @@ |
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/*
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* Javascript EXIF Reader - jQuery plugin 0.1.3
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* Copyright (c) 2008 Jacob Seidelin, cupboy@gmail.com, http://blog.nihilogic.dk/
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* Licensed under the MPL License [http://www.nihilogic.dk/licenses/mpl-license.txt]
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*/
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/*
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* I added three functions for read EXIF from dataURL
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* - getImageDataFromDataURL
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* - getDataFromDataURL
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* - jQuery.fn.exifLoadFromDataURL
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*
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* http://orientation.gokercebeci.com
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* @gokercebeci
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*/
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(function() {
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var BinaryFile = function(strData, iDataOffset, iDataLength) {
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var data = strData;
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var dataOffset = iDataOffset || 0;
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var dataLength = 0;
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this.getRawData = function() {
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return data;
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}
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if (typeof strData == "string") {
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dataLength = iDataLength || data.length;
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this.getByteAt = function(iOffset) {
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return data.charCodeAt(iOffset + dataOffset) & 0xFF;
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}
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} else if (typeof strData == "unknown") {
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dataLength = iDataLength || IEBinary_getLength(data);
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this.getByteAt = function(iOffset) {
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return IEBinary_getByteAt(data, iOffset + dataOffset);
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}
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}
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this.getLength = function() {
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return dataLength;
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}
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this.getSByteAt = function(iOffset) {
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var iByte = this.getByteAt(iOffset);
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if (iByte > 127)
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return iByte - 256;
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else
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return iByte;
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}
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this.getShortAt = function(iOffset, bBigEndian) {
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var iShort = bBigEndian ?
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(this.getByteAt(iOffset) << 8) + this.getByteAt(iOffset + 1)
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: (this.getByteAt(iOffset + 1) << 8) + this.getByteAt(iOffset)
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if (iShort < 0)
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iShort += 65536;
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return iShort;
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}
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this.getSShortAt = function(iOffset, bBigEndian) {
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var iUShort = this.getShortAt(iOffset, bBigEndian);
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if (iUShort > 32767)
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return iUShort - 65536;
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else
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return iUShort;
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}
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this.getLongAt = function(iOffset, bBigEndian) {
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var iByte1 = this.getByteAt(iOffset),
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iByte2 = this.getByteAt(iOffset + 1),
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iByte3 = this.getByteAt(iOffset + 2),
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iByte4 = this.getByteAt(iOffset + 3);
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var iLong = bBigEndian ?
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(((((iByte1 << 8) + iByte2) << 8) + iByte3) << 8) + iByte4
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: (((((iByte4 << 8) + iByte3) << 8) + iByte2) << 8) + iByte1;
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if (iLong < 0)
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iLong += 4294967296;
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return iLong;
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}
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this.getSLongAt = function(iOffset, bBigEndian) {
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var iULong = this.getLongAt(iOffset, bBigEndian);
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if (iULong > 2147483647)
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return iULong - 4294967296;
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else
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return iULong;
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}
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this.getStringAt = function(iOffset, iLength) {
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var aStr = [];
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for (var i = iOffset, j = 0; i < iOffset + iLength; i++, j++) {
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aStr[j] = String.fromCharCode(this.getByteAt(i));
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}
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return aStr.join("");
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}
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this.getCharAt = function(iOffset) {
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return String.fromCharCode(this.getByteAt(iOffset));
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}
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this.toBase64 = function() {
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return window.btoa(data);
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}
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this.fromBase64 = function(strBase64) {
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data = window.atob(strBase64);
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}
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}
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var BinaryAjax = (function() {
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function createRequest() {
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var oHTTP = null;
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if (window.XMLHttpRequest) {
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oHTTP = new XMLHttpRequest();
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} else if (window.ActiveXObject) {
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oHTTP = new ActiveXObject("Microsoft.XMLHTTP");
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}
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return oHTTP;
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}
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function getHead(strURL, fncCallback, fncError) {
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var oHTTP = createRequest();
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if (oHTTP) {
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if (fncCallback) {
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if (typeof(oHTTP.onload) != "undefined") {
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oHTTP.onload = function() {
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if (oHTTP.status == "200") {
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fncCallback(this);
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} else {
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if (fncError)
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fncError();
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}
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oHTTP = null;
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};
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} else {
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oHTTP.onreadystatechange = function() {
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if (oHTTP.readyState == 4) {
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if (oHTTP.status == "200") {
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fncCallback(this);
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} else {
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if (fncError)
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fncError();
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}
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oHTTP = null;
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}
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};
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}
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}
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oHTTP.open("HEAD", strURL, true);
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oHTTP.send(null);
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} else {
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if (fncError)
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fncError();
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}
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}
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function sendRequest(strURL, fncCallback, fncError, aRange, bAcceptRanges, iFileSize) {
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var oHTTP = createRequest();
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if (oHTTP) {
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var iDataOffset = 0;
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if (aRange && !bAcceptRanges) {
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iDataOffset = aRange[0];
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}
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var iDataLen = 0;
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if (aRange) {
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iDataLen = aRange[1] - aRange[0] + 1;
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}
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if (fncCallback) {
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if (typeof(oHTTP.onload) != "undefined") {
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oHTTP.onload = function() {
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if (oHTTP.status == "200" || oHTTP.status == "206" || oHTTP.status == "0") {
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this.binaryResponse = new BinaryFile(this.responseText, iDataOffset, iDataLen);
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this.fileSize = iFileSize || this.getResponseHeader("Content-Length");
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fncCallback(this);
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} else {
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if (fncError)
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fncError();
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}
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oHTTP = null;
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};
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} else {
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oHTTP.onreadystatechange = function() {
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if (oHTTP.readyState == 4) {
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if (oHTTP.status == "200" || oHTTP.status == "206" || oHTTP.status == "0") {
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this.binaryResponse = new BinaryFile(oHTTP.responseBody, iDataOffset, iDataLen);
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this.fileSize = iFileSize || this.getResponseHeader("Content-Length");
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fncCallback(this);
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} else {
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if (fncError)
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fncError();
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}
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oHTTP = null;
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}
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};
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}
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}
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oHTTP.open("GET", strURL, true);
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if (oHTTP.overrideMimeType)
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oHTTP.overrideMimeType('text/plain; charset=x-user-defined');
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if (aRange && bAcceptRanges) {
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oHTTP.setRequestHeader("Range", "bytes=" + aRange[0] + "-" + aRange[1]);
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}
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oHTTP.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 1970 00:00:00 GMT");
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oHTTP.send(null);
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} else {
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if (fncError)
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fncError();
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}
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}
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return function(strURL, fncCallback, fncError, aRange) {
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if (aRange) {
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getHead(
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strURL,
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function(oHTTP) {
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var iLength = parseInt(oHTTP.getResponseHeader("Content-Length"), 10);
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var strAcceptRanges = oHTTP.getResponseHeader("Accept-Ranges");
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var iStart, iEnd;
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iStart = aRange[0];
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if (aRange[0] < 0)
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iStart += iLength;
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iEnd = iStart + aRange[1] - 1;
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sendRequest(strURL, fncCallback, fncError, [iStart, iEnd], (strAcceptRanges == "bytes"), iLength);
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}
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);
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} else {
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sendRequest(strURL, fncCallback, fncError);
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}
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}
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}());
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var script = document.createElement("script");
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script.type = 'text/vbscript';
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script.innerHTML =
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"Function IEBinary_getByteAt(strBinary, iOffset)\r\n"
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+ " IEBinary_getByteAt = AscB(MidB(strBinary,iOffset+1,1))\r\n"
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+ "End Function\r\n"
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+ "Function IEBinary_getLength(strBinary)\r\n"
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+ " IEBinary_getLength = LenB(strBinary)\r\n"
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+ "End Function";
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document.head.appendChild(script);
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var EXIF = {};
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(function() {
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var bDebug = false;
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EXIF.Tags = {
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// version tags
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0x9000: "ExifVersion", // EXIF version
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0xA000: "FlashpixVersion", // Flashpix format version
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// colorspace tags
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0xA001: "ColorSpace", // Color space information tag
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// image configuration
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0xA002: "PixelXDimension", // Valid width of meaningful image
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0xA003: "PixelYDimension", // Valid height of meaningful image
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0x9101: "ComponentsConfiguration", // Information about channels
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0x9102: "CompressedBitsPerPixel", // Compressed bits per pixel
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// user information
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0x927C: "MakerNote", // Any desired information written by the manufacturer
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0x9286: "UserComment", // Comments by user
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// related file
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0xA004: "RelatedSoundFile", // Name of related sound file
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// date and time
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0x9003: "DateTimeOriginal", // Date and time when the original image was generated
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0x9004: "DateTimeDigitized", // Date and time when the image was stored digitally
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0x9290: "SubsecTime", // Fractions of seconds for DateTime
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0x9291: "SubsecTimeOriginal", // Fractions of seconds for DateTimeOriginal
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0x9292: "SubsecTimeDigitized", // Fractions of seconds for DateTimeDigitized
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// picture-taking conditions
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0x829A: "ExposureTime", // Exposure time (in seconds)
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0x829D: "FNumber", // F number
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0x8822: "ExposureProgram", // Exposure program
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0x8824: "SpectralSensitivity", // Spectral sensitivity
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0x8827: "ISOSpeedRatings", // ISO speed rating
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0x8828: "OECF", // Optoelectric conversion factor
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0x9201: "ShutterSpeedValue", // Shutter speed
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0x9202: "ApertureValue", // Lens aperture
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0x9203: "BrightnessValue", // Value of brightness
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0x9204: "ExposureBias", // Exposure bias
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0x9205: "MaxApertureValue", // Smallest F number of lens
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0x9206: "SubjectDistance", // Distance to subject in meters
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0x9207: "MeteringMode", // Metering mode
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0x9208: "LightSource", // Kind of light source
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0x9209: "Flash", // Flash status
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0x9214: "SubjectArea", // Location and area of main subject
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0x920A: "FocalLength", // Focal length of the lens in mm
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0xA20B: "FlashEnergy", // Strobe energy in BCPS
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0xA20C: "SpatialFrequencyResponse", //
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0xA20E: "FocalPlaneXResolution", // Number of pixels in width direction per FocalPlaneResolutionUnit
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0xA20F: "FocalPlaneYResolution", // Number of pixels in height direction per FocalPlaneResolutionUnit
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0xA210: "FocalPlaneResolutionUnit", // Unit for measuring FocalPlaneXResolution and FocalPlaneYResolution
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0xA214: "SubjectLocation", // Location of subject in image
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0xA215: "ExposureIndex", // Exposure index selected on camera
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0xA217: "SensingMethod", // Image sensor type
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0xA300: "FileSource", // Image source (3 == DSC)
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0xA301: "SceneType", // Scene type (1 == directly photographed)
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0xA302: "CFAPattern", // Color filter array geometric pattern
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0xA401: "CustomRendered", // Special processing
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0xA402: "ExposureMode", // Exposure mode
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0xA403: "WhiteBalance", // 1 = auto white balance, 2 = manual
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0xA404: "DigitalZoomRation", // Digital zoom ratio
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0xA405: "FocalLengthIn35mmFilm", // Equivalent foacl length assuming 35mm film camera (in mm)
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0xA406: "SceneCaptureType", // Type of scene
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0xA407: "GainControl", // Degree of overall image gain adjustment
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0xA408: "Contrast", // Direction of contrast processing applied by camera
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0xA409: "Saturation", // Direction of saturation processing applied by camera
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0xA40A: "Sharpness", // Direction of sharpness processing applied by camera
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0xA40B: "DeviceSettingDescription", //
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0xA40C: "SubjectDistanceRange", // Distance to subject
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// other tags
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0xA005: "InteroperabilityIFDPointer",
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0xA420: "ImageUniqueID" // Identifier assigned uniquely to each image
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};
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EXIF.TiffTags = {
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0x0100: "ImageWidth",
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0x0101: "ImageHeight",
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0x8769: "ExifIFDPointer",
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0x8825: "GPSInfoIFDPointer",
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0xA005: "InteroperabilityIFDPointer",
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0x0102: "BitsPerSample",
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0x0103: "Compression",
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0x0106: "PhotometricInterpretation",
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0x0112: "Orientation",
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0x0115: "SamplesPerPixel",
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0x011C: "PlanarConfiguration",
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0x0212: "YCbCrSubSampling",
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0x0213: "YCbCrPositioning",
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0x011A: "XResolution",
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0x011B: "YResolution",
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0x0128: "ResolutionUnit",
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0x0111: "StripOffsets",
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0x0116: "RowsPerStrip",
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0x0117: "StripByteCounts",
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0x0201: "JPEGInterchangeFormat",
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0x0202: "JPEGInterchangeFormatLength",
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0x012D: "TransferFunction",
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0x013E: "WhitePoint",
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0x013F: "PrimaryChromaticities",
|
|
|
|
0x0211: "YCbCrCoefficients",
|
|
|
|
0x0214: "ReferenceBlackWhite",
|
|
|
|
0x0132: "DateTime",
|
|
|
|
0x010E: "ImageDescription",
|
|
|
|
0x010F: "Make",
|
|
|
|
0x0110: "Model",
|
|
|
|
0x0131: "Software",
|
|
|
|
0x013B: "Artist",
|
|
|
|
0x8298: "Copyright"
|
|
|
|
}
|
|
|
|
|
|
|
|
EXIF.GPSTags = {
|
|
|
|
0x0000: "GPSVersionID",
|
|
|
|
0x0001: "GPSLatitudeRef",
|
|
|
|
0x0002: "GPSLatitude",
|
|
|
|
0x0003: "GPSLongitudeRef",
|
|
|
|
0x0004: "GPSLongitude",
|
|
|
|
0x0005: "GPSAltitudeRef",
|
|
|
|
0x0006: "GPSAltitude",
|
|
|
|
0x0007: "GPSTimeStamp",
|
|
|
|
0x0008: "GPSSatellites",
|
|
|
|
0x0009: "GPSStatus",
|
|
|
|
0x000A: "GPSMeasureMode",
|
|
|
|
0x000B: "GPSDOP",
|
|
|
|
0x000C: "GPSSpeedRef",
|
|
|
|
0x000D: "GPSSpeed",
|
|
|
|
0x000E: "GPSTrackRef",
|
|
|
|
0x000F: "GPSTrack",
|
|
|
|
0x0010: "GPSImgDirectionRef",
|
|
|
|
0x0011: "GPSImgDirection",
|
|
|
|
0x0012: "GPSMapDatum",
|
|
|
|
0x0013: "GPSDestLatitudeRef",
|
|
|
|
0x0014: "GPSDestLatitude",
|
|
|
|
0x0015: "GPSDestLongitudeRef",
|
|
|
|
0x0016: "GPSDestLongitude",
|
|
|
|
0x0017: "GPSDestBearingRef",
|
|
|
|
0x0018: "GPSDestBearing",
|
|
|
|
0x0019: "GPSDestDistanceRef",
|
|
|
|
0x001A: "GPSDestDistance",
|
|
|
|
0x001B: "GPSProcessingMethod",
|
|
|
|
0x001C: "GPSAreaInformation",
|
|
|
|
0x001D: "GPSDateStamp",
|
|
|
|
0x001E: "GPSDifferential"
|
|
|
|
}
|
|
|
|
|
|
|
|
EXIF.StringValues = {
|
|
|
|
ExposureProgram: {
|
|
|
|
0: "Not defined",
|
|
|
|
1: "Manual",
|
|
|
|
2: "Normal program",
|
|
|
|
3: "Aperture priority",
|
|
|
|
4: "Shutter priority",
|
|
|
|
5: "Creative program",
|
|
|
|
6: "Action program",
|
|
|
|
7: "Portrait mode",
|
|
|
|
8: "Landscape mode"
|
|
|
|
},
|
|
|
|
MeteringMode: {
|
|
|
|
0: "Unknown",
|
|
|
|
1: "Average",
|
|
|
|
2: "CenterWeightedAverage",
|
|
|
|
3: "Spot",
|
|
|
|
4: "MultiSpot",
|
|
|
|
5: "Pattern",
|
|
|
|
6: "Partial",
|
|
|
|
255: "Other"
|
|
|
|
},
|
|
|
|
LightSource: {
|
|
|
|
0: "Unknown",
|
|
|
|
1: "Daylight",
|
|
|
|
2: "Fluorescent",
|
|
|
|
3: "Tungsten (incandescent light)",
|
|
|
|
4: "Flash",
|
|
|
|
9: "Fine weather",
|
|
|
|
10: "Cloudy weather",
|
|
|
|
11: "Shade",
|
|
|
|
12: "Daylight fluorescent (D 5700 - 7100K)",
|
|
|
|
13: "Day white fluorescent (N 4600 - 5400K)",
|
|
|
|
14: "Cool white fluorescent (W 3900 - 4500K)",
|
|
|
|
15: "White fluorescent (WW 3200 - 3700K)",
|
|
|
|
17: "Standard light A",
|
|
|
|
18: "Standard light B",
|
|
|
|
19: "Standard light C",
|
|
|
|
20: "D55",
|
|
|
|
21: "D65",
|
|
|
|
22: "D75",
|
|
|
|
23: "D50",
|
|
|
|
24: "ISO studio tungsten",
|
|
|
|
255: "Other"
|
|
|
|
},
|
|
|
|
Flash: {
|
|
|
|
0x0000: "Flash did not fire",
|
|
|
|
0x0001: "Flash fired",
|
|
|
|
0x0005: "Strobe return light not detected",
|
|
|
|
0x0007: "Strobe return light detected",
|
|
|
|
0x0009: "Flash fired, compulsory flash mode",
|
|
|
|
0x000D: "Flash fired, compulsory flash mode, return light not detected",
|
|
|
|
0x000F: "Flash fired, compulsory flash mode, return light detected",
|
|
|
|
0x0010: "Flash did not fire, compulsory flash mode",
|
|
|
|
0x0018: "Flash did not fire, auto mode",
|
|
|
|
0x0019: "Flash fired, auto mode",
|
|
|
|
0x001D: "Flash fired, auto mode, return light not detected",
|
|
|
|
0x001F: "Flash fired, auto mode, return light detected",
|
|
|
|
0x0020: "No flash function",
|
|
|
|
0x0041: "Flash fired, red-eye reduction mode",
|
|
|
|
0x0045: "Flash fired, red-eye reduction mode, return light not detected",
|
|
|
|
0x0047: "Flash fired, red-eye reduction mode, return light detected",
|
|
|
|
0x0049: "Flash fired, compulsory flash mode, red-eye reduction mode",
|
|
|
|
0x004D: "Flash fired, compulsory flash mode, red-eye reduction mode, return light not detected",
|
|
|
|
0x004F: "Flash fired, compulsory flash mode, red-eye reduction mode, return light detected",
|
|
|
|
0x0059: "Flash fired, auto mode, red-eye reduction mode",
|
|
|
|
0x005D: "Flash fired, auto mode, return light not detected, red-eye reduction mode",
|
|
|
|
0x005F: "Flash fired, auto mode, return light detected, red-eye reduction mode"
|
|
|
|
},
|
|
|
|
SensingMethod: {
|
|
|
|
1: "Not defined",
|
|
|
|
2: "One-chip color area sensor",
|
|
|
|
3: "Two-chip color area sensor",
|
|
|
|
4: "Three-chip color area sensor",
|
|
|
|
5: "Color sequential area sensor",
|
|
|
|
7: "Trilinear sensor",
|
|
|
|
8: "Color sequential linear sensor"
|
|
|
|
},
|
|
|
|
SceneCaptureType: {
|
|
|
|
0: "Standard",
|
|
|
|
1: "Landscape",
|
|
|
|
2: "Portrait",
|
|
|
|
3: "Night scene"
|
|
|
|
},
|
|
|
|
SceneType: {
|
|
|
|
1: "Directly photographed"
|
|
|
|
},
|
|
|
|
CustomRendered: {
|
|
|
|
0: "Normal process",
|
|
|
|
1: "Custom process"
|
|
|
|
},
|
|
|
|
WhiteBalance: {
|
|
|
|
0: "Auto white balance",
|
|
|
|
1: "Manual white balance"
|
|
|
|
},
|
|
|
|
GainControl: {
|
|
|
|
0: "None",
|
|
|
|
1: "Low gain up",
|
|
|
|
2: "High gain up",
|
|
|
|
3: "Low gain down",
|
|
|
|
4: "High gain down"
|
|
|
|
},
|
|
|
|
Contrast: {
|
|
|
|
0: "Normal",
|
|
|
|
1: "Soft",
|
|
|
|
2: "Hard"
|
|
|
|
},
|
|
|
|
Saturation: {
|
|
|
|
0: "Normal",
|
|
|
|
1: "Low saturation",
|
|
|
|
2: "High saturation"
|
|
|
|
},
|
|
|
|
Sharpness: {
|
|
|
|
0: "Normal",
|
|
|
|
1: "Soft",
|
|
|
|
2: "Hard"
|
|
|
|
},
|
|
|
|
SubjectDistanceRange: {
|
|
|
|
0: "Unknown",
|
|
|
|
1: "Macro",
|
|
|
|
2: "Close view",
|
|
|
|
3: "Distant view"
|
|
|
|
},
|
|
|
|
FileSource: {
|
|
|
|
3: "DSC"
|
|
|
|
},
|
|
|
|
Components: {
|
|
|
|
0: "",
|
|
|
|
1: "Y",
|
|
|
|
2: "Cb",
|
|
|
|
3: "Cr",
|
|
|
|
4: "R",
|
|
|
|
5: "G",
|
|
|
|
6: "B"
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
function addEvent(oElement, strEvent, fncHandler)
|
|
|
|
{
|
|
|
|
if (oElement.addEventListener) {
|
|
|
|
oElement.addEventListener(strEvent, fncHandler, false);
|
|
|
|
} else if (oElement.attachEvent) {
|
|
|
|
oElement.attachEvent("on" + strEvent, fncHandler);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
function imageHasData(oImg)
|
|
|
|
{
|
|
|
|
return !!(oImg.exifdata);
|
|
|
|
}
|
|
|
|
|
|
|
|
function getImageData(oImg, fncCallback)
|
|
|
|
{
|
|
|
|
BinaryAjax(
|
|
|
|
oImg.src,
|
|
|
|
function(oHTTP) {
|
|
|
|
console.log('BINARY', oHTTP.binaryResponse);
|
|
|
|
var oEXIF = findEXIFinJPEG(oHTTP.binaryResponse);
|
|
|
|
oImg.exifdata = oEXIF || {};
|
|
|
|
if (fncCallback)
|
|
|
|
fncCallback();
|
|
|
|
}
|
|
|
|
)
|
|
|
|
}
|
|
|
|
|
|
|
|
function getImageDataFromDataURL(oImg, fncCallback)
|
|
|
|
{
|
|
|
|
var byteString = atob(oImg.src.split(',')[1]);
|
|
|
|
var f = new BinaryFile(byteString, 0, byteString.length)
|
|
|
|
var oEXIF = findEXIFinJPEG(f);
|
|
|
|
oImg.exifdata = oEXIF || {};
|
|
|
|
if (fncCallback)
|
|
|
|
fncCallback();
|
|
|
|
}
|
|
|
|
|
|
|
|
function findEXIFinJPEG(oFile) {
|
|
|
|
var aMarkers = [];
|
|
|
|
|
|
|
|
if (oFile.getByteAt(0) != 0xFF || oFile.getByteAt(1) != 0xD8) {
|
|
|
|
return false; // not a valid jpeg
|
|
|
|
}
|
|
|
|
|
|
|
|
var iOffset = 2;
|
|
|
|
var iLength = oFile.getLength();
|
|
|
|
while (iOffset < iLength) {
|
|
|
|
if (oFile.getByteAt(iOffset) != 0xFF) {
|
|
|
|
if (bDebug)
|
|
|
|
console.log("Not a valid marker at offset " + iOffset + ", found: " + oFile.getByteAt(iOffset));
|
|
|
|
return false; // not a valid marker, something is wrong
|
|
|
|
}
|
|
|
|
|
|
|
|
var iMarker = oFile.getByteAt(iOffset + 1);
|
|
|
|
|
|
|
|
// we could implement handling for other markers here,
|
|
|
|
// but we're only looking for 0xFFE1 for EXIF data
|
|
|
|
|
|
|
|
if (iMarker == 22400) {
|
|
|
|
if (bDebug)
|
|
|
|
console.log("Found 0xFFE1 marker");
|
|
|
|
return readEXIFData(oFile, iOffset + 4, oFile.getShortAt(iOffset + 2, true) - 2);
|
|
|
|
iOffset += 2 + oFile.getShortAt(iOffset + 2, true);
|
|
|
|
|
|
|
|
} else if (iMarker == 225) {
|
|
|
|
// 0xE1 = Application-specific 1 (for EXIF)
|
|
|
|
if (bDebug)
|
|
|
|
console.log("Found 0xFFE1 marker");
|
|
|
|
return readEXIFData(oFile, iOffset + 4, oFile.getShortAt(iOffset + 2, true) - 2);
|
|
|
|
|
|
|
|
} else {
|
|
|
|
iOffset += 2 + oFile.getShortAt(iOffset + 2, true);
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
function readTags(oFile, iTIFFStart, iDirStart, oStrings, bBigEnd)
|
|
|
|
{
|
|
|
|
var iEntries = oFile.getShortAt(iDirStart, bBigEnd);
|
|
|
|
var oTags = {};
|
|
|
|
for (var i = 0; i < iEntries; i++) {
|
|
|
|
var iEntryOffset = iDirStart + i * 12 + 2;
|
|
|
|
var strTag = oStrings[oFile.getShortAt(iEntryOffset, bBigEnd)];
|
|
|
|
if (!strTag && bDebug)
|
|
|
|
console.log("Unknown tag: " + oFile.getShortAt(iEntryOffset, bBigEnd));
|
|
|
|
oTags[strTag] = readTagValue(oFile, iEntryOffset, iTIFFStart, iDirStart, bBigEnd);
|
|
|
|
}
|
|
|
|
return oTags;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
function readTagValue(oFile, iEntryOffset, iTIFFStart, iDirStart, bBigEnd)
|
|
|
|
{
|
|
|
|
var iType = oFile.getShortAt(iEntryOffset + 2, bBigEnd);
|
|
|
|
var iNumValues = oFile.getLongAt(iEntryOffset + 4, bBigEnd);
|
|
|
|
var iValueOffset = oFile.getLongAt(iEntryOffset + 8, bBigEnd) + iTIFFStart;
|
|
|
|
|
|
|
|
switch (iType) {
|
|
|
|
case 1: // byte, 8-bit unsigned int
|
|
|
|
case 7: // undefined, 8-bit byte, value depending on field
|
|
|
|
if (iNumValues == 1) {
|
|
|
|
return oFile.getByteAt(iEntryOffset + 8, bBigEnd);
|
|
|
|
} else {
|
|
|
|
var iValOffset = iNumValues > 4 ? iValueOffset : (iEntryOffset + 8);
|
|
|
|
var aVals = [];
|
|
|
|
for (var n = 0; n < iNumValues; n++) {
|
|
|
|
aVals[n] = oFile.getByteAt(iValOffset + n);
|
|
|
|
}
|
|
|
|
return aVals;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case 2: // ascii, 8-bit byte
|
|
|
|
var iStringOffset = iNumValues > 4 ? iValueOffset : (iEntryOffset + 8);
|
|
|
|
return oFile.getStringAt(iStringOffset, iNumValues - 1);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case 3: // short, 16 bit int
|
|
|
|
if (iNumValues == 1) {
|
|
|
|
return oFile.getShortAt(iEntryOffset + 8, bBigEnd);
|
|
|
|
} else {
|
|
|
|
var iValOffset = iNumValues > 2 ? iValueOffset : (iEntryOffset + 8);
|
|
|
|
var aVals = [];
|
|
|
|
for (var n = 0; n < iNumValues; n++) {
|
|
|
|
aVals[n] = oFile.getShortAt(iValOffset + 2 * n, bBigEnd);
|
|
|
|
}
|
|
|
|
return aVals;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case 4: // long, 32 bit int
|
|
|
|
if (iNumValues == 1) {
|
|
|
|
return oFile.getLongAt(iEntryOffset + 8, bBigEnd);
|
|
|
|
} else {
|
|
|
|
var aVals = [];
|
|
|
|
for (var n = 0; n < iNumValues; n++) {
|
|
|
|
aVals[n] = oFile.getLongAt(iValueOffset + 4 * n, bBigEnd);
|
|
|
|
}
|
|
|
|
return aVals;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 5: // rational = two long values, first is numerator, second is denominator
|
|
|
|
if (iNumValues == 1) {
|
|
|
|
return oFile.getLongAt(iValueOffset, bBigEnd) / oFile.getLongAt(iValueOffset + 4, bBigEnd);
|
|
|
|
} else {
|
|
|
|
var aVals = [];
|
|
|
|
for (var n = 0; n < iNumValues; n++) {
|
|
|
|
aVals[n] = oFile.getLongAt(iValueOffset + 8 * n, bBigEnd) / oFile.getLongAt(iValueOffset + 4 + 8 * n, bBigEnd);
|
|
|
|
}
|
|
|
|
return aVals;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 9: // slong, 32 bit signed int
|
|
|
|
if (iNumValues == 1) {
|
|
|
|
return oFile.getSLongAt(iEntryOffset + 8, bBigEnd);
|
|
|
|
} else {
|
|
|
|
var aVals = [];
|
|
|
|
for (var n = 0; n < iNumValues; n++) {
|
|
|
|
aVals[n] = oFile.getSLongAt(iValueOffset + 4 * n, bBigEnd);
|
|
|
|
}
|
|
|
|
return aVals;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 10: // signed rational, two slongs, first is numerator, second is denominator
|
|
|
|
if (iNumValues == 1) {
|
|
|
|
return oFile.getSLongAt(iValueOffset, bBigEnd) / oFile.getSLongAt(iValueOffset + 4, bBigEnd);
|
|
|
|
} else {
|
|
|
|
var aVals = [];
|
|
|
|
for (var n = 0; n < iNumValues; n++) {
|
|
|
|
aVals[n] = oFile.getSLongAt(iValueOffset + 8 * n, bBigEnd) / oFile.getSLongAt(iValueOffset + 4 + 8 * n, bBigEnd);
|
|
|
|
}
|
|
|
|
return aVals;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
function readEXIFData(oFile, iStart, iLength)
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{
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if (oFile.getStringAt(iStart, 4) != "Exif") {
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if (bDebug)
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console.log("Not valid EXIF data! " + oFile.getStringAt(iStart, 4));
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return false;
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}
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var bBigEnd;
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var iTIFFOffset = iStart + 6;
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// test for TIFF validity and endianness
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if (oFile.getShortAt(iTIFFOffset) == 0x4949) {
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bBigEnd = false;
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} else if (oFile.getShortAt(iTIFFOffset) == 0x4D4D) {
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bBigEnd = true;
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} else {
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if (bDebug)
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console.log("Not valid TIFF data! (no 0x4949 or 0x4D4D)");
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return false;
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}
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if (oFile.getShortAt(iTIFFOffset + 2, bBigEnd) != 0x002A) {
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if (bDebug)
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console.log("Not valid TIFF data! (no 0x002A)");
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return false;
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}
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if (oFile.getLongAt(iTIFFOffset + 4, bBigEnd) != 0x00000008) {
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if (bDebug)
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console.log("Not valid TIFF data! (First offset not 8)", oFile.getShortAt(iTIFFOffset + 4, bBigEnd));
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return false;
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}
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var oTags = readTags(oFile, iTIFFOffset, iTIFFOffset + 8, EXIF.TiffTags, bBigEnd);
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if (oTags.ExifIFDPointer) {
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var oEXIFTags = readTags(oFile, iTIFFOffset, iTIFFOffset + oTags.ExifIFDPointer, EXIF.Tags, bBigEnd);
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for (var strTag in oEXIFTags) {
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switch (strTag) {
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case "LightSource" :
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case "Flash" :
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case "MeteringMode" :
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case "ExposureProgram" :
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case "SensingMethod" :
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case "SceneCaptureType" :
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case "SceneType" :
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case "CustomRendered" :
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case "WhiteBalance" :
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case "GainControl" :
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case "Contrast" :
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case "Saturation" :
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case "Sharpness" :
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case "SubjectDistanceRange" :
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case "FileSource" :
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oEXIFTags[strTag] = EXIF.StringValues[strTag][oEXIFTags[strTag]];
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break;
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case "ExifVersion" :
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case "FlashpixVersion" :
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oEXIFTags[strTag] = String.fromCharCode(oEXIFTags[strTag][0], oEXIFTags[strTag][1], oEXIFTags[strTag][2], oEXIFTags[strTag][3]);
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break;
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case "ComponentsConfiguration" :
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oEXIFTags[strTag] =
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EXIF.StringValues.Components[oEXIFTags[strTag][0]]
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+ EXIF.StringValues.Components[oEXIFTags[strTag][1]]
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+ EXIF.StringValues.Components[oEXIFTags[strTag][2]]
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+ EXIF.StringValues.Components[oEXIFTags[strTag][3]];
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break;
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}
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oTags[strTag] = oEXIFTags[strTag];
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}
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}
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if (oTags.GPSInfoIFDPointer) {
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var oGPSTags = readTags(oFile, iTIFFOffset, iTIFFOffset + oTags.GPSInfoIFDPointer, EXIF.GPSTags, bBigEnd);
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for (var strTag in oGPSTags) {
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switch (strTag) {
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case "GPSVersionID" :
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oGPSTags[strTag] = oGPSTags[strTag][0]
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+ "." + oGPSTags[strTag][1]
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+ "." + oGPSTags[strTag][2]
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+ "." + oGPSTags[strTag][3];
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break;
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}
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oTags[strTag] = oGPSTags[strTag];
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}
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}
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return oTags;
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}
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EXIF.getData = function(oImg, fncCallback)
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{
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if (!oImg.complete)
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return false;
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if (!imageHasData(oImg)) {
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getImageData(oImg, fncCallback);
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} else {
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if (fncCallback)
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fncCallback();
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}
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return true;
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}
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EXIF.getDataFromDataURL = function(oImg, fncCallback)
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{
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if (!oImg.complete)
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return false;
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if (!imageHasData(oImg)) {
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getImageDataFromDataURL(oImg, fncCallback);
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} else {
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if (fncCallback)
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fncCallback();
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}
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return true;
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}
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EXIF.getTag = function(oImg, strTag)
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{
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if (!imageHasData(oImg))
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return;
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return oImg.exifdata[strTag];
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}
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EXIF.getAllTags = function(oImg)
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{
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if (!imageHasData(oImg))
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return {};
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var oData = oImg.exifdata;
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var oAllTags = {};
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for (var a in oData) {
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if (oData.hasOwnProperty(a)) {
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oAllTags[a] = oData[a];
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}
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}
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return oAllTags;
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}
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EXIF.pretty = function(oImg)
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{
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if (!imageHasData(oImg))
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return "";
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var oData = oImg.exifdata;
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var strPretty = "";
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for (var a in oData) {
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if (oData.hasOwnProperty(a)) {
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if (typeof oData[a] == "object") {
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strPretty += a + " : [" + oData[a].length + " values]\r\n";
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} else {
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strPretty += a + " : " + oData[a] + "\r\n";
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}
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}
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}
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return strPretty;
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}
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EXIF.readFromBinaryFile = function(oFile) {
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return findEXIFinJPEG(oFile);
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}
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function loadAllImages()
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{
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var aImages = document.getElementsByTagName("img");
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for (var i = 0; i < aImages.length; i++) {
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if (aImages[i].getAttribute("exif") == "true") {
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if (!aImages[i].complete) {
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addEvent(aImages[i], "load",
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function() {
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EXIF.getData(this);
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}
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);
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} else {
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EXIF.getData(aImages[i]);
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}
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}
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}
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}
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// automatically load exif data for all images with exif=true when doc is ready
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jQuery(document).ready(loadAllImages);
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// load data for images manually
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jQuery.fn.exifLoad = function(fncCallback) {
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return this.each(function() {
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EXIF.getData(this, fncCallback)
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});
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}
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// load data for images manually
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jQuery.fn.exifLoadFromDataURL = function(fncCallback) {
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return this.each(function() {
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EXIF.getDataFromDataURL(this, fncCallback)
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return true;
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});
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}
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jQuery.fn.exif = function(strTag) {
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var aStrings = [];
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this.each(function() {
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aStrings.push(EXIF.getTag(this, strTag));
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});
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return aStrings;
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}
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jQuery.fn.exifAll = function() {
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var aStrings = [];
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this.each(function() {
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aStrings.push(EXIF.getAllTags(this));
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});
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return aStrings;
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}
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jQuery.fn.exifPretty = function() {
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var aStrings = [];
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this.each(function() {
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aStrings.push(EXIF.pretty(this));
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});
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return aStrings;
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}
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})();
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})();
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Rushabh Mehta
преди 10 години