Why not just do something like the below when you need to do that? var img = new Image(); img.onload = function(){ //draw to canvas }; img.src =

Why not just do something like the below when you need to do that? var img = new Image(); img.onload = function(){ //draw to canvas }; img.src = "image.png"; Could be a stupid answer, or possibly it'd be better to do it your way?( Maybe I can learn something :) )