if(!Draw.textFont) {
  Draw.textFont = function(font, size, variant) {
    if(!Canvas.configured) {
      console.warn("KAPhy Warning - You must use Canvas.configure(); before you can draw!");
      return;
    }
    
    var currentFont = Canvas.context.font.split(" ");
    
    Canvas.context.font = (variant ? (variant + " ") : "") + Math.round(size ? size : parseInt(currentFont[currentFont.length - 2])) + "px " + font;
  };
}

@@ -349,20 +349,37 @@
 (size ? 
+Canvas.toPixels(
 size
+)
  : parse

Update textfont.js