Using CSS approach how to set an image to fill a path in SVG?

问题

I want to create a CSS class to fill a path with image that can be applied on any SVG path and fill that path with image. The image must be stretch to fit that path.

To achieve this; I create a pattern with image tag and set the width and height as 100%. but the image takes 100% of the whole screen instead of objectBoundingBox of the container (in this case svg tag).

Below is the sample code:

.myClass {
  fill: url(#image);
  stroke: red;
  stroke-width: 5;
}

<svg id='pattern' xmlns="http://www.w3.org/2000/svg" version="1.1">
  <defs>
    <pattern id='image' x=0 y=0 width="100%" height="100%" patternUnits='objectBoundingBox'>
      <image xlink:href='myImage.png' x=0 y=0 width="100%" height="100%" preserveAspectRatio="none"></image>
    </pattern>
  </defs>
</svg>
<svg id='triangle' xmlns="http://www.w3.org/2000/svg" version="1.1" width='300px' height='300px'>
    <path d='M0 0 L300 0 L300 300 Z' class='myClass'></path>
</svg>

May be I am doing something wrong.

Please suggest any solution for this problem.

回答1:

Here's your thing working - http://jsfiddle.net/eAfTc/

.myClass {
  fill: url(#image);
  stroke: red;
  stroke-width: 5;
}

<svg id='pattern' xmlns="http://www.w3.org/2000/svg" version="1.1">
  <defs>
    <pattern id='image' width="1" height="1" viewBox="0 0 100 100" preserveAspectRatio="none">
      <image xlink:href='http://dummyimage.com/600x400/abc/333' width="100" height="100" preserveAspectRatio="none"></image>
    </pattern>
  </defs>
</svg>
<svg id='triangle' xmlns="http://www.w3.org/2000/svg" version="1.1" width='300px' height='300px'>
    <path d='M0 0 L300 0 L300 300 Z' class='myClass'></path>
</svg>

Note that there's a patternContentUnits and a patternUnits, they do different things. Personally I prefer to use a viewBox for defining the coordinate system.

Here's a new example showing the pattern applied to various elements of different sizes and aspect ratios, it also gets rid of the first svg fragment.

Update: I added 'preserveAspectRatio' to the <pattern> element, and a new example showing the stretching and scaling.

来源：https://stackoverflow.com/questions/13914868/using-css-approach-how-to-set-an-image-to-fill-a-path-in-svg

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