/// <reference types="node" />
import { Static } from '@sinclair/typebox';
export interface Sprite {
    id: string;
    data: Buffer;
    pixelDensity: number;
    layout: string;
    etag: string | null;
    upstreamUrl: string | null;
}
export declare type UpstreamSpriteResponse = {
    data: Buffer;
    etag?: string;
    layout: SpriteIndex;
} | Error;
export declare const SpriteIndexSchema: import("@sinclair/typebox").TRecord<import("@sinclair/typebox").TString<string>, import("@sinclair/typebox").TObject<{
    width: import("@sinclair/typebox").TNumber;
    height: import("@sinclair/typebox").TNumber;
    x: import("@sinclair/typebox").TNumber;
    y: import("@sinclair/typebox").TNumber;
    pixelRatio: import("@sinclair/typebox").TNumber;
    content: import("@sinclair/typebox").TOptional<import("@sinclair/typebox").TTuple<[import("@sinclair/typebox").TNumber, import("@sinclair/typebox").TNumber, import("@sinclair/typebox").TNumber, import("@sinclair/typebox").TNumber]>>;
    stretchX: import("@sinclair/typebox").TOptional<import("@sinclair/typebox").TArray<import("@sinclair/typebox").TTuple<[import("@sinclair/typebox").TNumber, import("@sinclair/typebox").TNumber]>>>;
    stretchY: import("@sinclair/typebox").TOptional<import("@sinclair/typebox").TArray<import("@sinclair/typebox").TTuple<[import("@sinclair/typebox").TNumber, import("@sinclair/typebox").TNumber]>>>;
}>>;
export declare type SpriteIndex = Static<typeof SpriteIndexSchema>;
export declare const validateSpriteIndex: import("ajv/dist/types").ValidateFunction<Record<string, {
    content?: [number, number, number, number] | undefined;
    stretchX?: [number, number][] | undefined;
    stretchY?: [number, number][] | undefined;
    x: number;
    y: number;
    width: number;
    height: number;
    pixelRatio: number;
}>>;
export declare function parseSpriteName(input: string): {
    id: string;
    pixelDensity: number;
};
export declare function generateSpriteId(upstreamSpriteUrl: string): string;