web frontend - How to achieve a Progressive Blur using SVG by combining a filter with a mask? -


i'm trying achieve linear blur effect 1 on image, using just svg, no css!!!

linear blur

notice how top of image blurred, bottom isn't.

in svg blur effect can achieved using fegaussianblur. gradient can used lineargradient.

how can these 2 combined?

it's possible entirely in filter without using double images, can buggy because of how both firefox , chrome handle ops on low opacities. straightforward way it. note have clip image edges clean image because fegaussianblur creates edge fades.

<svg width="800px" height="600px">    <defs>      <lineargradient id="progfade" x1="0%" x2="0%" y1="0%" y2="100%">        <stop offset="0%" stop-color="black"/>        <stop offset="60%" stop-color="white"/>            </lineargradient>            <mask id="progfademask" >          <rect x="0%" y="0%" width="100%" height="100%" fill="url(#progfade)"  />        <mask>           <filter id="blurme" x="0%" y="0%" width="100%" height="100%">       <fegaussianblur stddeviation="15" result="blurry"/>      </filter>         <clippath id="outerclip">         <rect x="20" y="20" width="460" height="380" fill="black">        </clippath>      </defs>    <g clip-path="url(#outerclip)">           <image x="0" y="0" filter="url(#blurme)" xlink:href="http://cps-static.rovicorp.com/3/jpg_400/mi0003/890/mi0003890640.jpg" width="494" height="400"/>    <image x="0" y="0" mask="url(#progfademask)" xlink:href="http://cps-static.rovicorp.com/3/jpg_400/mi0003/890/mi0003890640.jpg" width="494" height="400"/>         </g>  </svg>

enjoy progressively blurred chaka khan


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