从CamanJS给出以下过滤器:
Caman.Filter.register("lomo", function(vignette) {
if (vignette == null) {
vignette = true;
}
this.brightness(15);
this.exposure(15);
this.curves('rgb', [0, 0], [200, 0], [155, 255], [255, 255]);
this.saturation(-20);
this.gamma(1.8);
if (vignette) {
this.vignette("50%", 60);
}
return this.brightness(5);
});
如何将此过滤器转换为KineticJS等效项?