parser.addVariable("fgB", 0.0);
parser.addVariable("fgWidth", (double) fgWidth);
parser.addVariable("fgHeight", (double) fgHeight);
parser.addVariable("bgR", 0.0);
parser.addVariable("bgG", 0.0);
parser.addVariable("bgB", 0.0);
parser.addVariable("bgWidth", (double) bgWidth);
parser.addVariable("bgHeight", (double) bgHeight);
parser.addVariable("fgLeft", (double) fgLeft);
parser.addVariable("fgTop", (double) fgTop);
parser.addVariable("fgX", 0.0);