import type { CDPSession, Page } from "playwright";
export declare const FAST_RENDER_PLAYBACK_RATE = 4;
/** Parallel export is independent of the accelerated capture switch. */
export declare function resolveFastRenderParallel(requested?: number, environment?: string | undefined): number;
export declare function resolveFastRenderSpeed(requested?: number, environment?: string | undefined): number;
/** Explicit options override the process switch, including an explicit false. */
export declare function resolveFastRender(requested?: boolean, environment?: string | undefined): boolean;
export interface FastCaptureRequest {
    /** Absolute first frame; callbacks also receive absolute frame indices. */
    readonly startFrame?: number;
    readonly frameCount: number;
    readonly signal?: AbortSignal;
    /** Ordered CFR frames; missed compositor frames hold the preceding image. */
    readonly onFrame: (frame: number, png: Uint8Array) => Promise<void>;
}
export interface FastCaptureResult {
    readonly capturedFrames: number;
    readonly repeatedFrames: number;
}
/** Fixed absolute shards; callbacks from different pages may arrive out of order. */
export declare function captureParallelFrames(instances: readonly {
    readonly captureFrames?: (request: FastCaptureRequest) => Promise<FastCaptureResult>;
}[], parallelism: number, request: FastCaptureRequest): Promise<FastCaptureResult>;
export declare function captureFastViewport(cdp: CDPSession): Promise<{
    data: string;
}>;
/** Continuous compositor capture. Only the endpoints require a screenshot transaction. */
export declare function captureFastSequence(page: Page, cdp: CDPSession, fps: number, playbackRate: number, request: FastCaptureRequest): Promise<FastCaptureResult>;
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