/**
 * Read an image's intrinsic dimensions from its file **header**, in pure JS - no decode, no codec, no
 * dependency. Supports PNG, JPEG, GIF, and WebP (VP8/VP8L/VP8X). Used to give `<Image>` CLS-safe
 * `width`/`height` (build-time tooling can pre-read them into a manifest).
 */
export type ImageFormat = "png" | "jpeg" | "gif" | "webp";
export interface ImageInfo {
    readonly width: number;
    readonly height: number;
    readonly format: ImageFormat;
}
/** Parse intrinsic dimensions + format from image header bytes, or `null` if unrecognized/too short. */
export declare function imageDimensions(bytes: Uint8Array): ImageInfo | null;
/**
 * Read just the leading bytes of an image file (via the platform `Bun.file`/`fetch` blob) and parse its
 * dimensions. Build-time tooling: pre-read dimensions into a manifest so `<Image>` is CLS-safe without
 * hardcoding sizes. Reads at most `maxBytes` (default 64 KB - enough for any header).
 */
export declare function readImageDimensions(source: {
    arrayBuffer(): Promise<ArrayBuffer>;
    stream?: () => ReadableStream<Uint8Array>;
}, maxBytes?: number): Promise<ImageInfo | null>;
//# sourceMappingURL=dimensions.d.ts.map