Derivation

type Derivation = 
  | {
  height: number;
  type: "subset";
  width: number;
  x: number;
  y: number;
}
  | {
  height: number;
  sampling?: ImageSampling;
  type: "scaled";
  width: number;
}
  | {
  orientation: Orientation;
  type: "oriented";
}
  | {
  blurX: number;
  blurY: number;
  type: "blurred";
};