/*!
 * TornPaper.js v0.0.3
 * Copyright(c)2024 Wakana Y.K./happy358
 * Site:https://github.com/happy358/TornPaper/
 * Released under the MIT license.
 * see https://github.com/happy358/TornPaper/blob/master/LICENSE
 */
class Tornpaper{constructor(e=null){this.filterName="filter_tornpaper",this.seed=Math.floor(1e7*Math.random()),this.grungeFrequency=.03,this.grungeScale=3,this.tornFrequency=.05,this.tornScale=10,e&&this.init(e),this.run}init(e){this.filterName=e.filterName||this.filterName,(e.seed||0==e.seed)&&(this.seed=e.seed),(e.grungeScale||0==e.grungeScale)&&(this.grungeScale=e.grungeScale),(e.grungeFrequency||0==e.grungeFrequency)&&(this.grungeFrequency=e.grungeFrequency),(e.tornFrequency||0==e.tornFrequency)&&(this.tornFrequency=e.tornFrequency),(e.tornScale||0==e.tornScale)&&(this.tornScale=e.tornScale)}get run(){return this.addHtml()}addHtml(){this.tornpaper()}tornpaper(){let e=document.createElementNS("http://www.w3.org/2000/svg","svg");e.style=this.style(),e.innerHTML=`<filter id="${this.filterName}"><feTurbulence type="fractalNoise" baseFrequency="${this.grungeFrequency}" result="paper_noise" numOctaves="10" seed="${this.seed}" /><feDiffuseLighting in="paper_noise" lighting-color="white" surfaceScale="${this.grungeScale}" result="paper"><feDistantLight azimuth="45" elevation="60" /></feDiffuseLighting><feTurbulence baseFrequency="${this.tornFrequency}" type="turbulence" numOctaves="10" seed="${this.seed}" result="edge_noise" /><feGaussianBlur stdDeviation="0.5" in="SourceGraphic" /><feMorphology operator="erode" radius="5" /><feOffset dx="-2" dy="-2" /><feDisplacementMap scale="${this.tornScale}" xChannelSelector="B" yChannelSelector="G" in2="edge_noise" result="edge" /><feComposite in="paper" in2="edge" operator="atop" result="result_rough" /><feComposite in="SourceGraphic" in2="edge" operator="atop" result="result_sg" /><feBlend mode="multiply" in="result_rough" in2="result_sg" /></filter>`,document.body.appendChild(e)}style(){return"position:fixed;top:0;left:0;width:0;height:0;z-index:-1;"}}