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<?xml version="1.0"?>
<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
<defs>
<!-- so that other documents can svg:use this one and force it to
load before onload -->
<g id="empty" />
<!-- Keep all black pixels black, and change any others to white. -->
<!-- NOTE: alpha is preserved, so it will not adjust alpha edges -->
<filter id="NonBlackToWhite" x="0%" y="0%" width="100%" height="100%">
<feColorMatrix type="matrix" values="255 255 255 0 0
255 255 255 0 0
255 255 255 0 0
0 0 0 1 0" />
</filter>
<!-- Keep all white pixels white, and change any others to black. -->
<!-- NOTE: alpha is preserved, so it will not adjust alpha edges -->
<filter id="NonWhiteToBlack" x="0%" y="0%" width="100%" height="100%">
<feComponentTransfer>
<feFuncR type="linear" slope="-1" intercept="1" />
<feFuncG type="linear" slope="-1" intercept="1" />
<feFuncB type="linear" slope="-1" intercept="1" />
</feComponentTransfer>
<feColorMatrix type="matrix" values="255 255 255 0 0
255 255 255 0 0
255 255 255 0 0
0 0 0 1 0" />
<feComponentTransfer>
<feFuncR type="linear" slope="-1" intercept="1" />
<feFuncG type="linear" slope="-1" intercept="1" />
<feFuncB type="linear" slope="-1" intercept="1" />
</feComponentTransfer>
</filter>
<!-- Threshold colours into sixteen steps per channel. -->
<filter id="ThresholdRGB" x="0%" y="0%" width="100%" height="100%" color-interpolation-filters="sRGB">
<feComponentTransfer>
<feFuncR type="discrete" tableValues="0 .125 .25 .375 .5 .625 .75 .875 1" />
<feFuncG type="discrete" tableValues="0 .125 .25 .375 .5 .625 .75 .875 1" />
<feFuncB type="discrete" tableValues="0 .125 .25 .375 .5 .625 .75 .875 1" />
</feComponentTransfer>
</filter>
</defs>
</svg>
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