import { OnInit, OnDestroy, AfterViewInit, ElementRef, OnChanges, SimpleChanges, NgZone } from '@angular/core';
import * as i0 from "@angular/core";
export declare class LetterGlitchBackgroundComponent implements OnInit, AfterViewInit, OnDestroy, OnChanges {
    private ngZone;
    containerRef: ElementRef<HTMLDivElement>;
    canvasRef: ElementRef<HTMLCanvasElement>;
    /** 闪烁颜色数组 */
    ncGlitchColors: string[];
    /** 闪烁频率（毫秒）（1-100） */
    ncGlitchSpeed: number;
    /** 是否显示中心暗角 */
    private _centerVignette;
    set ncCenterVignette(val: boolean | string);
    get ncCenterVignette(): boolean;
    /** 是否显示边缘暗角 */
    private _outerVignette;
    set ncOuterVignette(val: boolean | string);
    get ncOuterVignette(): boolean;
    /** 是否开启平滑过渡 */
    private _smooth;
    set ncSmooth(val: boolean | string);
    get ncSmooth(): boolean;
    /** 字符集 */
    ncCharacters: string;
    private animationRef;
    private letters;
    private grid;
    private context;
    private lastGlitchTime;
    private resizeTimeout;
    private activeLetterIndices;
    private fontSize;
    private charWidth;
    private charHeight;
    constructor(ngZone: NgZone);
    ngOnInit(): void;
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    ngOnChanges(changes: SimpleChanges): void;
    onResize(): void;
    private initCanvas;
    private getRandomChar;
    private getRandomColor;
    private parseColor;
    private interpolateColor;
    private calculateGrid;
    private initializeLetters;
    private resizeCanvas;
    private drawLetters;
    private updateLetters;
    private handleSmoothTransitions;
    private animate;
    static ɵfac: i0.ɵɵFactoryDeclaration<LetterGlitchBackgroundComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<LetterGlitchBackgroundComponent, "nc-letter-glitch-background", never, { "ncGlitchColors": "ncGlitchColors"; "ncGlitchSpeed": "ncGlitchSpeed"; "ncCenterVignette": "ncCenterVignette"; "ncOuterVignette": "ncOuterVignette"; "ncSmooth": "ncSmooth"; "ncCharacters": "ncCharacters"; }, {}, never, ["*"]>;
}