/**
 * Minimal, dependency-free PNG dimension reader.
 *
 * The adapter derives an image's `width`/`height` from the committed PNG bytes
 * rather than trusting the manifest, so reference dimensions can never drift
 * from the pixels the diff engine actually rasterizes against. The bytes may
 * come from disk (a directory bundle) or from an in-memory unzip (a `.zip`
 * bundle), so the parser works on a buffer the adapter already holds.
 */
export interface PngSize {
    width: number;
    height: number;
}
/**
 * Parse a PNG's pixel dimensions from its IHDR chunk.
 *
 * @param buf the raw PNG bytes (signature must be first).
 * @param label a human path/name for error messages.
 * @throws if the bytes are not a PNG (signature / IHDR mismatch) or report
 *   zero dimensions.
 */
export declare function parsePngSize(buf: Uint8Array, label?: string): PngSize;
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