renderBackground method
Implementation
@override
void renderBackground(Color backgroundColor) {
var camera = display.camera;
var c = display.applyColorTransformation(backgroundColor);
ctx.fillStyle = c.toRGBAString();
var x = camera.frameCenter.x - camera.frameWidth / 2;
var y = camera.frameCenter.y - camera.frameHeight / 2;
ctx.fillRect(x, y, camera.frameWidth, camera.frameHeight);
}