import { ExportProgress, RasterizeSlide } from './export-controller.svelte';
/**
 * Animated-GIF export capture/encode pipeline. All the pure logic is shared:
 * `planGifFrames` derives the per-slide frame delays (default duration +
 * per-slide overrides), `clampGifDimensions` bounds the output size, and
 * `encodeGif` (median-cut quantisation + LZW GIF89a) produces the bytes with
 * each frame carrying its own plan delay. This module only owns the
 * DOM-adjacent glue: rasterising each slide via the injected capture callback
 * and normalising every frame onto a uniform-size canvas before pixel
 * extraction. Blob download is left to the caller (`ExportController`).
 */
/** Options for the animated-GIF export. */
export interface ExportGifOptions {
    /** Duration each slide is shown, in milliseconds. Default 2000. */
    slideDurationMs?: number;
    /** Per-slide duration overrides in milliseconds (index maps to slide index). */
    slideTimingsMs?: number[];
    /**
     * Longest allowed output side in pixels; frames are scaled down
     * proportionally. Default 960 (GIF encoding cost grows with pixel count:
     * every pixel is matched against a 256-colour palette per frame).
     */
    maxDimension?: number;
    /** Capture-phase progress callback: `(currentSlide, totalSlides)`. */
    onProgress?: ExportProgress;
    /** Abort the export early; checked before each slide capture. */
    signal?: AbortSignal;
}
/** Injected capture dependencies (kept DOM-free for unit tests). */
export interface GifCaptureDeps {
    /** Live slide count; read fresh on every call. */
    getSlideCount(): number;
    rasterizeSlide: RasterizeSlide;
    /** Canvas factory override (test seam). Defaults to `document.createElement`. */
    createCanvas?: (width: number, height: number) => HTMLCanvasElement;
}
/**
 * Capture every slide and encode the sequence as an animated GIF Blob.
 * Rejects with the shared `AbortError` when `signal` aborts between slides.
 */
export declare function exportSlidesToGifBlob(deps: GifCaptureDeps, options?: ExportGifOptions): Promise<Blob>;
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