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代码编辑器：

<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" 
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">

<svg width="100%" height="100%" version="1.1"
xmlns="http://www.w3.org/2000/svg">

<defs>
<linearGradient id="MyGrad" gradientUnits="userSpaceOnUse" x1="50" y1="0" x2="600" y2="0">
	<stop offset="0" stop-color="#ff0000" />
	<stop offset=".33" stop-color="#00ff00" />
	<stop offset=".67" stop-color="#0000ff" />
	<stop offset="1" stop-color="#000000" />
</linearGradient>

<filter id="Identity">
	<feComponentTransfer>
        	<feFuncR type="identity"/>
	        <feFuncG type="identity"/>
        	<feFuncB type="identity"/>
	        <feFuncA type="identity"/>
      </feComponentTransfer>
</filter>
<filter id="Table">
	<feComponentTransfer>
        	<feFuncR type="table" tableValues="0 0 1 1"/>
	        <feFuncG type="table" tableValues="1 1 0 0"/>
        	<feFuncB type="table" tableValues="0 1 1 0"/>
      	</feComponentTransfer>
</filter>
<filter id="Linear">
	<feComponentTransfer>
        	<feFuncR type="linear" slope=".5" intercept=".25"/>
	        <feFuncG type="linear" slope=".5" intercept="0"/>
        	<feFuncB type="linear" slope=".5" intercept=".5"/>
	</feComponentTransfer>
</filter>
<filter id="Gamma">
	<feComponentTransfer>
        	<feFuncR type="gamma" amplitude="2" exponent="5" offset="0"/>
	        <feFuncG type="gamma" amplitude="2" exponent="3" offset="0"/>
        	<feFuncB type="gamma" amplitude="2" exponent="1" offset="0"/>
	</feComponentTransfer>
</filter>
</defs>

<g font-size="50" font-weight="bold" fill="url(#MyGrad)">
<text x="50" y="60" filter="url(#Identity)">Identity</text>
<text x="50" y="120" filter="url(#Table)">TableLookup</text>
<text x="50" y="180" filter="url(#Linear)">LinearFunc</text>
<text x="50" y="240" filter="url(#Gamma)">GammaFunc</text>
</g>

</svg>

运行结果：