mask

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In SVG, you can specify that any other graphics object or <g> element can be used as an alpha mask for compositing the current object into the background. A mask is defined with the mask element. A mask is used/referenced using the mask property.

Usage context

Categories Container element
Permitted content Any number of the following elements, in any order:
Animation elements »
Descriptive elements »
Shape elements »
Structural elements »
Gradient elements »
<a>, <altglyphdef>, <clippath>, <color-profile>, <cursor>, <filter>, <font>, <font-face>, <foreignobject>, <image>, <marker>, <mask>, <pattern>, <script>, <style>, <switch>, <text>, <view>
Normative document SVG 1.1 (2nd Edition)

Example

Source code Output result
<?xml version="1.0"?>
<svg width="200" height="80" 
     viewBox="0 0 200 80" version="1.1"
     xmlns="http://www.w3.org/2000/svg" 
     xmlns:xlink="http://www.w3.org/1999/xlink">

    <defs>
        <mask id="myMask" maskUnits="userSpaceOnUse"
              x="0" y="0" width="200" height="80">
            <rect x="0" y="0" width="100" height="80" fill="white"/>
        </mask>

        <text id="Text" x="100" y="48" 
              font-size="26" font-weight="bold" text-anchor="middle">
            Black & White
        </text>
    </defs>

    <!-- Draw black rectangle in the background -->
    <rect x="100" y="10" width="95" height="60"  />
  
    <!-- Draw the text string twice. First, the white text without mask.
         Second, the black text with the mask applied-->
    <use xlink:href="#Text" fill="white"/>
    <use xlink:href="#Text" fill="black" mask="url(#myMask)"/>
</svg>

» mask.svg

Attributes

Global attributes

Specific attributes

DOM Interface

This element implements the SVGMaskElement interface.

See also

Anexos

Arquivo Tamanho Data Anexado por
mask.svg
927 bytes 2011-02-15 12:59:02 Jeremie

Document Tags and Contributors

Contributors to this page: kscarfone, Jeremie
Última atualização por: kscarfone,