Question

Is there any way to call canvas functions using apply() or a similar method, as to dynamically call canvas methods or to be able to pass an array of arguments?

Im looking for this effect
context.fillRect.apply(this,args);

Answer 1

If I understand you correctly:

var op = "fillRect";    
var args = [
  10, 10, 180, 180  
];
ctx[op].apply(ctx, args);

Example: http://jsfiddle.net/eZwYQ/