export type Rotation = 0 | 90 | 180 | 270;
export declare const normalizeRotation: (deg: number) => Rotation;
export declare const viewSize: (cw: number, ch: number, rotation: Rotation) => {
    w: number;
    h: number;
};
export declare const contentSize: (vw: number, vh: number, rotation: Rotation) => {
    w: number;
    h: number;
};
export declare const contentToView: (x: number, y: number, rotation: Rotation, cw: number, ch: number) => {
    x: number;
    y: number;
};
export declare const viewToContent: (x: number, y: number, rotation: Rotation, cw: number, ch: number) => {
    x: number;
    y: number;
};
export declare const innerLayerTransform: (rotation: Rotation, contentWidthPx: number, contentHeightPx: number) => string;