/*!
 * Copyright (c) Microsoft Corporation.
 * Licensed under the MIT License.
 */
import { vec3, vec4 } from "gl-matrix";
import { ShaderBase } from "./shader.js";
export declare class SdfText extends ShaderBase {
    private _texture2D;
    private _positionAttribute;
    private _texCoordAttribute;
    private _idColorAttribute;
    private _samplerUniform;
    private _colorUniform;
    private _hoverColorUniform;
    private _pickUniform;
    private _pickedIdColorUniform;
    private _borderColorUniform;
    private _bufferUniform;
    private _borderWidthUniform;
    private _gammaUniform;
    color: vec3;
    hoverColor: vec3;
    borderColor: vec3;
    borderWidth: number;
    buffer: number;
    gamma: number;
    pickedIdColor: vec4;
    get texture2D(): WebGLTexture;
    set texture2D(value: WebGLTexture);
    initializeContext(gl: WebGLRenderingContext): void;
    private _initializeShader;
    apply(): void;
    applyModel(): void;
    applyView(): void;
    updateBuffers(): void;
    updateTextures(): void;
}