/**
 * Pluggable page-renderer interface.
 *
 * The default screenshot path uses `node-canvas` (Cairo). For large PDFs on
 * Node.js, that path can hit `v8::ArrayBuffer::New` OOM inside
 * `Context2d::GetImageData` (see docs/PERFORMANCE_PLAN.md and the linked
 * node-canvas / pdf.js GitHub issues). Consumers can opt into an alternative
 * renderer (e.g. PuppeteerRenderer) that side-steps node-canvas entirely.
 *
 * Implementations are responsible only for the per-page rasterization step.
 * Text/image extraction, link extraction, and page composition still run on
 * the Node-side pdf.js instance owned by PdfDecomposer.
 */
export interface PdfPageRenderResult {
    /** Rendered canvas width in pixels. */
    width: number;
    /** Rendered canvas height in pixels. */
    height: number;
    /** Image as a data URL, e.g. `data:image/jpeg;base64,...`. */
    base64: string;
}
export interface PdfPageRenderOptions {
    /** Target image width in pixels. Height is computed from the page aspect ratio. */
    width?: number;
    /** JPEG quality fraction 0..1 (matches HTMLCanvas.toDataURL contract). */
    quality?: number;
    /** Output image MIME type. Defaults to `image/jpeg`. */
    format?: 'image/jpeg' | 'image/png';
}
export interface PdfPageRenderer {
    /**
     * Called once by PdfDecomposer.initialize(). The renderer may use this hook
     * to prepare resources (spawn a browser, load pdf.js, etc.). Receives the
     * PDF bytes so the renderer can build its own document if needed.
     *
     * Optional — renderers that don't need setup can omit this.
     */
    initialize?(pdfData: Uint8Array): Promise<void>;
    /**
     * Render a single 1-indexed PDF page to an image data URL.
     *
     * The renderer is expected to release per-page resources before returning.
     */
    renderPage(pageNumber: number, options?: PdfPageRenderOptions): Promise<PdfPageRenderResult>;
    /**
     * Called when PdfDecomposer.dispose() runs. The renderer should release any
     * long-lived resources (browser process, temp files, etc.).
     *
     * Optional.
     */
    dispose?(): Promise<void>;
}
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