/*!
 * Copyright (c) Microsoft Corporation.
 * Licensed under the MIT License.
 */
import { UnitShader } from "./unitshader.js";
export declare class UnitSdf extends UnitShader {
    initializeContext(gl: WebGLRenderingContext): void;
    protected _initializeShader(gl: WebGLRenderingContext, vsSource: string, fsSource: string): void;
    _updateCurrentBuffer(): void;
    _updatePreviousBuffer(): void;
    apply(): void;
    updateTextures(): void;
    disableProgram(): void;
}