import { AgoraRtcCanvasHelper, AgoraRtcCanvasTag } from '../../../core/rtc/canvas';
import { AgoraRtcRenderResultType, AgoraRtcRenderSourceType } from '../../../core/rtc/type';
export declare class AgoraRtcCanvasHelperImpl extends AgoraRtcCanvasHelper {
    protected readonly logger: import("agora-foundation/lib/logger/type").Logger;
    readonly canvasMap: Map<HTMLElement, string>;
    readonly canvasTagPool: Map<HTMLElement, AgoraRtcCanvasTag>;
    constructor();
    bind(canvasAddress: HTMLElement, renderSourceId: string, type: AgoraRtcRenderSourceType): AgoraRtcRenderResultType;
    unbind(canvasAddress: HTMLElement): number;
    unbindAll(renderSourceId: string, type: AgoraRtcRenderSourceType): number;
    release(): number;
    private _generateCanvasId;
}