/*!
 * Copyright (c) Microsoft Corporation.
 * Licensed under the MIT License.
 */
import { ShaderBase } from "./shader.js";
import { vec3 } from "gl-matrix";
import { Main } from "../main.js";
import { Core } from "../../../main.js";
export declare class Background extends ShaderBase {
    private _positionAttribute;
    private _colorUniform;
    private _quad;
    private _vao;
    color: vec3;
    constructor(core: Core, main: Main);
    initializeContext(gl: WebGL2RenderingContext): void;
    private _initializeShader;
    apply(): void;
    updateBuffers(): void;
}