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CSS

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JavaScript

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HTML 

              
                <h1>SVG feDisplacement filter: how to deal with jagged edges</h1>
<svg class="container" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="800px"
        height="540px">
        <defs>
            <filter id="dm-filter1" x="-50%" y="-50%" width="200%" height="200%" color-interpolation-filters="sRGB"
                preserveAspectRatio="none">
                <feImage id="feimage1" preserveAspectRatio="none" result="FEIMG1" href="img/aliasingedges/bezmap.jpg" />
                <feDisplacementMap in="SourceGraphic" in2="FEIMG1" scale="150" xChannelSelector="R"
                    yChannelSelector="B" />
            </filter>
            <filter id="dm-filter2" x="-50%" y="-50%" width="200%" height="200%" color-interpolation-filters="sRGB"
                preserveAspectRatio="none">
                <feImage id="feimage2" preserveAspectRatio="none" result="FEIMG2" />
                <feDisplacementMap in="SourceGraphic" in2="FEIMG2" scale="150" xChannelSelector="R"
                    yChannelSelector="B" />
            </filter>
            <filter id="dm-filter3" x="-50%" y="-50%" width="200%" height="200%" color-interpolation-filters="sRGB"
                preserveAspectRatio="none">
                <feImage id="feimage3" preserveAspectRatio="none" result="FEIMG3" />
                <feDisplacementMap in="SourceGraphic" in2="FEIMG3" scale="150" xChannelSelector="R"
                    yChannelSelector="B" />
                <feGaussianBlur stdDeviation="2.5" />
                <feConvolveMatrix order="3" kernelMatrix="3.3 -3.3  3.3 -3.3 -.25 -3.3 3.3  -3.3  3.3" />
            </filter>
            <filter id="dm-filter4" x="-50%" y="-50%" width="200%" height="200%" color-interpolation-filters="sRGB"
                preserveAspectRatio="none">
                <feImage id="feimage4" preserveAspectRatio="none" result="FEIMG4" />
                <feDisplacementMap in="SourceGraphic" in2="FEIMG4" scale="150" xChannelSelector="R"
                    yChannelSelector="B" />
                <feGaussianBlur stdDeviation="1.5" />
                <feConvolveMatrix order="3" kernelMatrix="2.3 -2.3  2.3 -2.3 -1 -2.3 2.3  -2.3  2.3" />
            </filter>
            <symbol id="polygon">
                <path
                    d="M150,0L174.859,98.379L267.275,56.477L205.858,137.251L296.239,183.378L194.795,185.723L215.083,285.145L150,207.295L84.917,285.145L105.205,185.723L3.761,183.378L94.142,137.251L32.725,56.477L125.141,98.379L150,0Z"
                    style="fill:white;" />
            </symbol>
            <symbol id="monalisa">
                <image href="https://assets.codepen.io/100347/fedm-monalisa.jpg" id="filteredSVG__img" x="0" y="0" height="256px"
                    width="256px" />
            </symbol>
        </defs>
        <text class="info" y="30" x="140" text-anchor="middle">
            <tspan x="120" dy="0">JPG applied as</tspan>
            <tspan x="120" dy="1.4em">displacement map:</tspan>
            <tspan x="120" dy="1.4em">notice the ugly jagged edges.</tspan>
        </text>
        <g class="filter-jpgmap" transform="translate(40 140) scale(.5)">
            <use href="#polygon" />
        </g>
        <text class="info" y="30" x="410" text-anchor="middle">
            <tspan x="410" dy="0">SVG applied as displacement map:</tspan>
            <tspan x="410" dy="1.4em">Edges already look smoother</tspan>
            <tspan x="410" dy="1.4em">but are still way too jaggy.</tspan>
        </text>
        <g class="filter-svgmap" transform="translate(330 140) scale(.5)">
            <use href="#polygon" />
        </g>
        <text class="info" y="30" x="680" text-anchor="middle">
            <tspan x="680" dy="0">SVG map once more,</tspan>
            <tspan x="680" dy="1.4em">this time "fake" antialiasing</tspan>
            <tspan x="680" dy="1.4em">(blur filter + sharpening) was added.</tspan>
            <tspan x="680" dy="1.4em">Not perfekt, but good enough</tspan>
            <tspan x="680" dy="1.4em">for in-between states in animations.</tspan>
        </text>
        <g class="filter-svgmapantialiased-strong" transform="translate(630 140) scale(.5)">
            <use href="#polygon" />
        </g>
        <g class="filter-jpgmap" transform="translate(40 350) scale(.5)">
            <use href="#monalisa" />
        </g>
        <g class="filter-svgmap" transform="translate(330 350) scale(.5)">
            <use href="#monalisa" />
        </g>
        <g class="filter-svgmapantialiased-weak" transform="translate(630 350) scale(.5)">
            <use href="#monalisa" />
        </g>
    </svg>
!

CSS 

              
                html, body {
  height: 100%;font: 0.85em -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  color: white;
  text-align: center;
}

body {
  background: black;
}

.container {
  position: relative;
  display: block;
  margin: 0 auto;
  width: 800px;
  height: 540px;
}

.info {
  fill: white;
}

.filter-jpgmap{ 
    filter: url('#dm-filter1');
}

.filter-svgmap { 
    filter: url('#dm-filter2');
}

.filter-svgmapantialiased-strong { 
    filter: url('#dm-filter3');
}

.filter-svgmapantialiased-weak { 
    filter: url('#dm-filter4');
}
!

JS 

              
                class BlobLoader {
    blobContainer = {};

    async load(url) {
        let res;

        if (!this.blobContainer[url]) {
            res = await fetch(url, {
                method: 'GET',
                headers: new Headers(),
                mode: 'cors',
                cache: 'default',
            });

            this.blobContainer[url] = res.blob();
        }

        return this.blobContainer[url];
    }
  
    async readURL(url) {
        const blob = await this.load(url);

        return URL.createObjectURL(blob);
    }
}

const mapBlobs = new BlobLoader();

mapBlobs
    .readURL('https://assets.codepen.io/100347/fedm_bezmap.jpg')
    .then((url) => {
        document.getElementById('feimage1').setAttribute('href', url);
    });

mapBlobs
    .readURL('https://assets.codepen.io/100347/fedm_bezmap-1.svg')
    .then((url) => {
        document.getElementById('feimage2').setAttribute('href', url);
        document.getElementById('feimage3').setAttribute('href', url);
        document.getElementById('feimage4').setAttribute('href', url);
    });
!
999px

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