Whats the best approach to making a web application for drawing on and modifying an image?

Whats the best approach to making a web application for drawing on and modifying an image? Should be able to draw on, add text etc. I have been hearing a lot about SVG, but is that a required download for the user to view the application then? Whats the best way to handle this? What lan开发者_运维问答guage? etc. Thanks! Preferred: PHP jQuery javascript html css Thanks you!

Take a look at the HTML5 Canvas element:

http://diveintohtml5.ep.io/canvas.html

You can draw on (over) the image as well as add text. No install required.