SVG element rendering quality

Question

I have a SVG canvas which user can select and resize some <image> elements inside. And I use preserveAspectRatio="xMidYMid meet" attribute value to keep the original aspect ratio. The original image sources are mostly 256x256px size. On Firefox and IE-11, when I resize <image> elements to a smaller size than their original size, they look very pixelated. On Chrome they look pretty smooth. I wonder if there are any css or svg features which could help me to make them look smoother on Firefox and IE too.

Thank you.

EDIT: Adding sample..

https://jsfiddle.net/p8km6nhc/7/

<svg viewBox="-170 -87 1678 869" style="width: 100%; height: 100%; overflow: hidden; left: 0px; top: -0.800003px;" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1">
    <defs>
        <filter id="varlikItemShadow1">
            <feGaussianBlur stdDeviation="3" in="SourceGraphic"></feGaussianBlur>
            <feOffset dy="1" dx="1"></feOffset>
            <feMerge>
                <feMergeNode></feMergeNode>
                <feMergeNode in="SourceGraphic"></feMergeNode>
            </feMerge>
        </filter>
    </defs>
    <g>
        <g transform="matrix(1,0,0,1,0,0)">
            <g transform="matrix(1,0,0,1,158,256)">
                <g title="" data-original-title="" data-rounded="yes">
                    <text style="font:0px arial;" x="0" y="1" stroke="none" transform="matrix(1,0,0,1,0,0)" fill="#ffffff" fill-opacity="0.111111">[[VarlikId=3999]]</text>
                    <rect filter="url(#varlikItemShadow1" stroke="#2b5987" stroke-width="2" fill-opacity="0.9" fill="#ffe8f6" ry="10" rx="10" y="0" x="0" height="140" width="1270"></rect>
                    <path d="M0 0 L 1268 0 1268 138 0 138Z" stroke="none" stroke-width="0" fill="none" fill-opacity="0" transform="matrix(1,0,0,1,0,0)"></path>
                    <image image-rendering="optimizeQuality" preserveAspectRatio="xMidYMid meet" x="14" y="14" width="1242px" height="66px" xlink:href="https://deviantshare.azurewebsites.net/img/test.png"></image>
                    <text style="font:32px arial;" x="0" y="30" stroke="none" transform="matrix(1,0,0,1,591,94)" fill="#2b5987">3. Kat</text>
                </g>
            </g>
        </g>
    </g>
</svg>

RESULT :

Sample screenshot

bprasanna · Accepted Answer

As it clearly looks like an issue with Firefox and IE rendering, thought of trying a workaround to come over this.

Instead of using <image> element of SVG, tried using <img> tag of HTML and embedded it using <foreignObject> element of SVG.

Instead of :

<image image-rendering="optimizeQuality" preserveAspectRatio="xMidYMid meet" 
x="14" y="14" width="1242px" height="66px" 
xlink:href="https://deviantshare.azurewebsites.net/img/test.png"></image>

Used:

  <foreignObject x="600" y="14" width="100" height="100">
    <body>
      <img src="https://deviantshare.azurewebsites.net/img/test.png" 
       type="image/svg+xml" width="66px" height="66px">
    </body>
  </foreignObject>

But one pending issue is IE doesn't support foreignObject yet!

Codepen.io working example

SVG <image> element rendering quality

Tags:

html

css

svg

html-rendering

image-quality

Noldor

1 Answers

bprasanna

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