/// <reference types="node" />
import { FileID } from './fileID';
export interface ImageMetadata {
    width: number;
    height: number;
    format: string;
    orientation?: number;
}
export interface ImageBackend {
    transform(fileID: FileID, fileStream: NodeJS.ReadableStream): Promise<NodeJS.ReadableStream>;
    getMetadata(fileStream: NodeJS.ReadableStream): Promise<ImageMetadata | null>;
}
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