import { Ref } from 'vue';
export declare function useCanvas(canvasWidth: Ref<number>, canvasHeight: Ref<number>): {
    zoom: Ref<number, number>;
    panX: Ref<number, number>;
    panY: Ref<number, number>;
    isPreviewing: Ref<boolean, boolean>;
    viewportTransform: import('vue').ComputedRef<string>;
    setZoom: (newZoom: number, originX?: number, originY?: number) => void;
    zoomIn: () => void;
    zoomOut: () => void;
    resetZoom: () => void;
    fitToScreen: (containerWidth: number, containerHeight: number) => void;
    setCanvasSize: (w: number, h: number) => void;
};