export declare const isCanvasEnvironmentReady: () => boolean;
export declare const shouldRestoreCropBoxPosition: (dragFlag: boolean) => boolean;
export declare const restorePreviousCropBoxPosition: () => void;
/**
 * 截取整个屏幕
 * 1. 调用者尚未拖拽生成选区
 * 2. 鼠标尚未拖动
 * 3. 单击截取屏幕状态为true
 * @param dragFlag
 */
export declare const shouldCaptureFullScreenSelection: (dragFlag: boolean) => boolean;
export declare const captureFullScreenSelection: (screenShotImageController: HTMLCanvasElement) => void;