Import javascript logic to generate faces

retroshare-qml-app/src/components/Faces.js

@@ -0,0 +1,149 @@
+
+var iconCache = {};
+var callbackCache = {};
+
+var iconSize = scope.iconSize || 32;
+var canvasSize = iconSize > 32 ? 64 : 32;
+
+var canvas = $window.document.createElement('canvas');
+canvas.width = canvasSize;
+canvas.height = canvasSize;
+var ctx = canvas.getContext('2d');
+var nPieces = 6;
+var pieces = [];
+
+var total =
+{
+	female: [5, 4, 33, 17, 59, 53],
+	male: [5, 4, 36, 26, 65, 32]
+};
+
+var src = function(gender, piece, random)
+{
+	var head = gender === 'female' ? 'head' : 'hair';
+	var pieces = ['background', 'face', head, 'mouth', 'clothes', 'eye'];
+	var num = random % total[gender][piece] + 1;
+	return '../images/faces/'+gender+canvasSize+'/'+pieces[piece]+num+'.png';
+};
+
+function calcDataFromFingerprint(dataHex)
+{
+	var females = total.female.reduce(function(previousValue, currentValue)
+	{
+		return previousValue * currentValue;
+	});
+	var males = total.male.reduce(function(previousValue, currentValue)
+	{
+		return previousValue * currentValue;
+	});
+
+	var ret = [];
+	var data = parseInt(dataHex, 16) % (females+males);
+	if (data - females < 0)
+	{
+		var i = 0;
+		ret = ['female'];
+		while (data > 0 || i < total.female.length)
+		{
+			ret.push(data % total.female[i]);
+			data = parseInt(data / total.female[i]);
+			i++;
+		}
+	}
+	else
+	{
+		data = data - females;
+		var i = 0;
+		ret = ['male'];
+		while (data > 0 || i < total.male.length)
+		{
+			ret.push(data % total.male[i]);
+			data = parseInt(data / total.male[i]);
+			i++;
+		}
+	}
+	return ret;
+}
+
+function loadImage(onloads, piece)
+{
+	onloads.push(function(callback)
+	{
+		piece.addEventListener('load', function()
+		    {
+			    callback(null);
+		    }, false);
+	});
+}
+
+function generateImage(data, callback)
+{
+	var gender = data[0];
+	var onloads = [];
+	for (var i=0; i<nPieces; i++)
+	{
+		var piece = new Image();
+		piece.src = src(gender, i, data[i+1]);
+		pieces.push(piece);
+		loadImage(onloads, piece);
+	}
+	async.parallel(onloads, function()
+	    {
+		    for (var i=0; i < pieces.length; i++)
+			{
+				ctx.drawImage(pieces[i], 0, 0);
+			}
+			callback(canvas.toDataURL('image/png'));
+	    });
+}
+
+function generateAnonImage(callback)
+{
+	var anon = new Image();
+	anon.src = '../images/faces/anon'+canvasSize+'.png';
+	anon.addEventListener('load', function()
+	    {
+		    ctx.drawImage(anon, 0, 0);
+		    callback(canvas.toDataURL('image/png'));
+	    }, false);
+}
+
+// Create the identicon
+function createFromHex(dataHex)
+{
+	var iconId = [dataHex, iconSize];
+	var update = function(data)
+	{
+		iconCache[iconId] = data;
+		element.html('<img class="identicon" width='+iconSize+' height='+iconSize+' src="'+data+'">');
+	};
+	if (iconCache.hasOwnProperty(iconId))
+	{
+		update(iconCache[iconId]);
+	}
+	else if(callbackCache.hasOwnProperty(iconId))
+	{
+		callbackCache[iconId].push(update);
+	}
+	else
+	{
+		var onImageGenerated = function(data)
+		    {
+			    callbackCache[iconId].forEach(function(callback)
+				    {
+					    callback(data);
+				    });
+		    };
+
+	callbackCache[iconId] = [update];
+	if (dataHex)
+	{
+		generateImage(calcDataFromFingerprint(dataHex), onImageGenerated);
+	}
+	else
+	{
+		generateAnonImage(onImageGenerated);
+	}
+  }
+}
+

retroshare-qml-app/src/qml.qrc

@@ -742,5 +742,6 @@
         <file>icons/faces/male64/mouth7.png</file>
         <file>icons/faces/male64/mouth8.png</file>
         <file>icons/faces/male64/mouth9.png</file>
+        <file>components/Faces.js</file>
     </qresource>
 </RCC>