/*!
 * Copyright (c) Microsoft Corporation.
 * Licensed under the MIT License.
 */
/// <reference types="webxr" />
import { mat4, vec4 } from "gl-matrix";
import { LabelBase, Label, LabelSet, ILabelVisual, ILabelSetVisual } from "../../../components/labels.js";
import { Core } from "../../../main.js";
import { Main } from "../main.js";
declare abstract class LabelVisualBase {
    protected _isInitialized: boolean;
    protected _core: Core;
    protected _hasChanged: boolean;
    protected _mMatrix: mat4;
    protected _gl: WebGLRenderingContext;
    protected _main: Main;
    protected _vertexBuffer: WebGLBuffer;
    protected _indexBuffer: WebGLBuffer;
    protected _label: LabelBase;
    isVisible: boolean;
    viewports: DOMRect[];
    viewportOffset: number;
    viewportCount: number;
    mMatrix: mat4;
    mvMatrices: mat4[];
    vMatrices: mat4[];
    inverseVMatrices: mat4[];
    pMatrices: mat4[];
    framebuffers: WebGLFramebuffer[];
    get isInitialized(): boolean;
    pickFramebuffer: WebGLFramebuffer;
    pickVMatrix: mat4;
    pickPMatrix: mat4;
    isPickingEnabled: boolean;
    pickedIdColor: vec4;
    constructor(core: Core, main: Main, label: LabelBase);
    initializeContext(gl: WebGLRenderingContext): void;
    update(elapsedTime: number): void;
    render(elapsedTime: number, xrFrame?: XRFrame): void;
}
export declare class LabelVisual extends LabelVisualBase implements ILabelVisual {
    protected _label: Label;
    get label(): Label;
    set text(value: string[]);
    get text(): string[];
    constructor(core: Core, main: Main, label: Label);
}
export declare class LabelSetVisual extends LabelVisualBase implements ILabelSetVisual {
    protected _label: LabelSet;
    get label(): LabelSet;
    constructor(core: Core, main: Main, label: LabelSet);
}
export {};