Start of XMP reading.

Author: rlmcneary2

js/load-image-xmp.js

@@ -0,0 +1,47 @@
+; (function (factory) {
+    'use strict'
+    if (typeof define === 'function' && define.amd) {
+        // Register as an anonymous AMD module:
+        define(['./load-image', './load-image-meta'], factory)
+    } else if (typeof module === 'object' && module.exports) {
+        factory(require('./load-image'), require('./load-image-meta'))
+    } else {
+        // Browser globals:
+        factory(window.loadImage)
+    }
+} (function (loadImage) {
+    'use strict'
+
+    loadImage.parseXmpData = function (dataView, offset, length, data, options) {
+        if (options.disableExif) {
+            return;
+        }
+
+        // Check for the ASCII code for "http" (0x68747470). Note that the actual XMP identifier is quite long: "http://ns.adobe.com/xap/1.0/\x00"
+        var arrIdentifier = [];
+        var offsetNamespace = 4;
+        var lengthNamespace = 29;
+        for (var i = 0; i < lengthNamespace; i++) {
+            arrIdentifier[i] = String.fromCharCode(dataView.getInt8(offset + offsetNamespace + i));
+        }
+
+        var identifier = arrIdentifier.join("");
+        if (identifier !== "http://ns.adobe.com/xap/1.0/\0") {
+            // No XMP data.
+            return;
+        }
+
+        var offsetLp = 2; // Offset to the packet length field.
+        var xmpLength = dataView.getUint16(offset + offsetLp);
+
+        var lengthLp = 2;
+        xmpLength -= (lengthLp + lengthNamespace); // The packet length is a little misleading it includes the length of Lp and Namespace, remove those two to get the actual packet length.
+
+        var maxPacketLength = 65503;
+        if (maxPacketLength < xmpLength){
+            return;
+        }
+    }
+
+    loadImage.metaDataParsers.jpeg[0xffe1].push(loadImage.parseXmpData);
+}))

package.json

@@ -19,7 +19,8 @@
     "meta",
     "exif",
     "thumbnail",
-    "resizing"
+    "resizing",
+    "xmp"
   ],
   "homepage": "https://github.com/blueimp/JavaScript-Load-Image",
   "author": {
@@ -37,7 +38,7 @@
   },
   "scripts": {
     "test": "standard *.js js/*.js test/*.js && mocha-phantomjs test/index.html",
-    "build": "cd js && uglifyjs load-image.js load-image-orientation.js load-image-meta.js load-image-exif.js load-image-exif-map.js -c -m -o load-image.all.min.js --source-map load-image.all.min.js.map",
+    "build": "cd js && uglifyjs load-image.js load-image-orientation.js load-image-meta.js load-image-exif.js load-image-exif-map.js load-image-xmp.js -c -m -o load-image.all.min.js --source-map load-image.all.min.js.map",
     "preversion": "npm test",
     "version": "npm run build && git add -A js",
     "postversion": "git push --tags origin master master:gh-pages && npm publish"