Convert a given path of image to data-uri
/*
* Usage: $('#image').prop('src', url2uri('/200.gif') );
*/
function url2uri(src, width, height) {
var img = new Image();
img.src = src;
width = width || 300;
height = height || 300;
// Create an empty canvas element
var canvas = document.createElement("canvas");
canvas.width = width;
canvas.height = height;
// Copy the image contents to the canvas
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
// Get the data-URL formatted image
// Firefox supports PNG and JPEG. You could check img.src to
// guess the original format, but be aware the using "image/jpg"
// will re-encode the image.
var dataURL = canvas.toDataURL("image/png");
return dataURL;
// return dataURL.replace(/^data:image\/(png|jpg);base64,/, "");
}