import type { MouseEvent as ReactMouseEvent, TouchEvent as ReactTouchEvent } from 'react';
/**
 * Convert pointer events into slide-canvas coordinates.
 *
 * The slide `.viewport` is CSS-scaled (`transform: scale(canvasScale)`) and
 * left unsized so absolute children are not laid out twice. Pair `clientX/Y`
 * with the `.viewport-wrapper` rect (already in visual pixels) and divide by
 * canvasScale, times any ancestor CSS zoom (`rect.width / offsetWidth`).
 */
export type ReactPointerEvent = ReactMouseEvent | ReactTouchEvent;
export type PointerLike = MouseEvent | TouchEvent | ReactPointerEvent | {
    clientX: number;
    clientY: number;
};
export declare function nativePointerEvent(e: ReactPointerEvent | MouseEvent | TouchEvent): MouseEvent | TouchEvent;
export declare function getPointerClient(e: PointerLike): {
    x: number;
    y: number;
};
export declare function renderedScale(renderedSize: number, unscaledSize: number, fallback: number): number;
export declare function clientToCanvasPoint(clientX: number, clientY: number, originX: number, originY: number, scale: number): {
    x: number;
    y: number;
};
export declare function clientDeltaToCanvas(dx: number, dy: number, scale: number): {
    x: number;
    y: number;
};
export declare function findSlideViewport(from?: EventTarget | null): HTMLElement | null;
/**
 * The slide `.viewport` is intentionally unsized (absolute children + CSS
 * scale). Measuring it would be 0×0 and assigning it the unscaled slide size
 * double-applies zoom against `.viewport-wrapper`. Use the wrapper — already
 * sized to the *visual* slide — and multiply by the store canvas scale.
 */
export declare function getScaleRoot(viewport: HTMLElement | null): HTMLElement | null;
export declare function getViewportRenderedScale(viewport: HTMLElement | null, fallbackScale: number): number;
export declare function clientToCanvas(e: PointerLike, viewport: HTMLElement, fallbackScale: number): {
    x: number;
    y: number;
};
/** Wrapper-local visual pixels — same space as HitLayer / `elementVisualHitRect`. */
export declare function clientToWrapper(e: PointerLike, viewport: HTMLElement): {
    x: number;
    y: number;
};
export declare function pointerDeltaToCanvas(start: {
    x: number;
    y: number;
}, current: PointerLike, viewport: HTMLElement | null, fallbackScale: number): {
    x: number;
    y: number;
};