import { Context } from 'react';
/** 渲染目标：SVG 或 Canvas 2D */
export type RendererMode = 'svg' | 'canvas';
/** <Layout> 渲染目标的 context 回退；无 Provider 时为 undefined */
export declare const RendererModeContext: Context<RendererMode | undefined>;
/** 读取祖先注入的渲染目标（无则 undefined）；<Layout> 在 `renderer` prop 缺省时回退用它 */
export declare const useRendererMode: () => RendererMode | undefined;
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