export declare function trimCanvas(canvas: HTMLCanvasElement): HTMLCanvasElement;
export declare function fromDataURL(canvas: HTMLCanvasElement, dataUrl: string, options?: {
    ratio?: number;
    width?: number;
    height?: number;
    xOffset?: number;
    yOffset?: number;
}): Promise<void>;
export declare const generateSignatureImage: (text: string, fontFamily?: string, fontSize?: string) => any;
export declare function cloneCanvas(oldCanvas: HTMLCanvasElement): HTMLCanvasElement;
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