export interface WebGLContextInitOptions {
    /**
     * Options passed to `canvas.getContext`. Defaults to antialias enabled to match the rerelease renderer's smoothing.
     */
    readonly contextAttributes?: WebGLContextAttributes;
    /**
     * Extensions that must be present. Missing entries throw during construction so callers can fall back early.
     */
    readonly requiredExtensions?: readonly string[];
    /**
     * Extensions that will be queried if available. Missing optional extensions are ignored.
     */
    readonly optionalExtensions?: readonly string[];
}
export interface WebGLContextState {
    readonly gl: WebGL2RenderingContext;
    readonly extensions: Map<string, unknown>;
    /**
     * Returns true once a `webglcontextlost` event has been observed.
     */
    isLost(): boolean;
    /**
     * Registers a callback that fires on context loss. Returns an unsubscribe function.
     */
    onLost(callback: () => void): () => void;
    /**
     * Registers a callback that fires on context restoration. Returns an unsubscribe function.
     */
    onRestored(callback: () => void): () => void;
    /**
     * Remove event listeners and release references.
     */
    dispose(): void;
}
export declare function createWebGLContext(canvas: HTMLCanvasElement, options?: WebGLContextInitOptions): WebGLContextState;
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