import { PdfPageRenderResult, PdfRenderContext, PdfRenderer, PdfRenderPageOptions } from './types';
export interface WebGpuRendererOptions {
    readonly clear?: boolean;
    readonly background?: readonly [number, number, number, number];
    readonly fallbackOnUnsupported?: boolean;
    /** Rasterize glyph atlas at a higher scale before sampling it on the GPU. */
    readonly textOversample?: number;
    readonly glyphAtlasSize?: number;
    readonly pageCacheSize?: number;
}
export interface WebGpuRenderResult extends PdfPageRenderResult {
    readonly ops: number;
    readonly drawCalls: number;
    readonly glyphs: number;
    readonly paths: number;
    readonly images: number;
    readonly unsupportedOps: number;
    readonly unsupportedReasons: readonly string[];
    readonly cacheHit: boolean;
    readonly timings: WebGpuRenderTimings;
}
export interface WebGpuRenderTimings {
    readonly totalMs: number;
    readonly deviceMs: number;
    readonly pendingMs: number;
    readonly displayListMs: number;
    readonly fontMs: number;
    readonly buildMs: number;
    readonly replayMs: number;
    readonly textMs: number;
    readonly pathMs: number;
    readonly imageMs: number;
    readonly unsupportedMs: number;
    readonly finishMs: number;
    readonly uploadMs: number;
    readonly renderMs: number;
}
export interface WebGpuPrewarmResult {
    readonly pageIndex: number;
    readonly cacheHit: boolean;
    readonly prepared: boolean;
    readonly timings: Omit<WebGpuRenderTimings, 'renderMs'>;
}
export declare class WebGpuUnsupportedError extends Error {
    readonly unsupportedOps: number;
    readonly unsupportedReasons: readonly string[];
    constructor(message: string, unsupportedOps: number, unsupportedReasons: readonly string[]);
}
export declare class WebGpuRenderer implements PdfRenderer<HTMLCanvasElement, WebGpuRenderResult> {
    private readonly options;
    readonly id = "webgpu";
    readonly platform = "webgpu";
    private devicePromise;
    private readonly pipelines;
    private readonly registeredFontIds;
    private readonly glyphAtlas;
    private readonly pageCache;
    private readonly pendingPageBuilds;
    private readonly textureCache;
    private readonly documentIds;
    private nextDocumentId;
    constructor(options?: WebGpuRendererOptions);
    renderPage(context: PdfRenderContext, target: HTMLCanvasElement, options: PdfRenderPageOptions): Promise<WebGpuRenderResult>;
    prewarmPage(context: PdfRenderContext, options: PdfRenderPageOptions): Promise<WebGpuPrewarmResult>;
    destroy(): void;
    private getDeviceBundle;
    private registerDisplayListFonts;
    private getOrBuildPage;
    private buildPage;
    private emptyBuildTimings;
    private pageCacheKey;
    private documentId;
    private getCachedPage;
    private setCachedPage;
}
export declare const createWebGpuRenderer: (options?: WebGpuRendererOptions) => WebGpuRenderer;
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