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<h2 title="Class mxPngEncodeParam.Palette" class="title">Class mxPngEncodeParam.Palette</h2>
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<pre>public static class <span class="typeNameLabel">mxPngEncodeParam.Palette</span>
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extends <a href="mxPngEncodeParam.html" title="class in com.mxgraph.util.png">mxPngEncodeParam</a></pre>
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<h3>Nested classes/interfaces inherited from class com.mxgraph.util.png.<a href="mxPngEncodeParam.html" title="class in com.mxgraph.util.png">mxPngEncodeParam</a></h3>
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<code><a href="mxPngEncodeParam.Gray.html" title="class in com.mxgraph.util.png">mxPngEncodeParam.Gray</a>, <a href="mxPngEncodeParam.Palette.html" title="class in com.mxgraph.util.png">mxPngEncodeParam.Palette</a>, <a href="mxPngEncodeParam.RGB.html" title="class in com.mxgraph.util.png">mxPngEncodeParam.RGB</a></code></li>
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<h3>Fields inherited from class com.mxgraph.util.png.<a href="mxPngEncodeParam.html" title="class in com.mxgraph.util.png">mxPngEncodeParam</a></h3>
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<code><a href="mxPngEncodeParam.html#bitDepth">bitDepth</a>, <a href="mxPngEncodeParam.html#bitDepthSet">bitDepthSet</a>, <a href="mxPngEncodeParam.html#INTENT_ABSOLUTE">INTENT_ABSOLUTE</a>, <a href="mxPngEncodeParam.html#INTENT_PERCEPTUAL">INTENT_PERCEPTUAL</a>, <a href="mxPngEncodeParam.html#INTENT_RELATIVE">INTENT_RELATIVE</a>, <a href="mxPngEncodeParam.html#INTENT_SATURATION">INTENT_SATURATION</a>, <a href="mxPngEncodeParam.html#PNG_FILTER_AVERAGE">PNG_FILTER_AVERAGE</a>, <a href="mxPngEncodeParam.html#PNG_FILTER_NONE">PNG_FILTER_NONE</a>, <a href="mxPngEncodeParam.html#PNG_FILTER_PAETH">PNG_FILTER_PAETH</a>, <a href="mxPngEncodeParam.html#PNG_FILTER_SUB">PNG_FILTER_SUB</a>, <a href="mxPngEncodeParam.html#PNG_FILTER_UP">PNG_FILTER_UP</a></code></li>
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<table class="memberSummary">
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<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
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<tr>
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<th class="colFirst" scope="col">Constructor</th>
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<th class="colLast" scope="col">Description</th>
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</tr>
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<tr class="altColor">
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">Palette</a></span>()</code></th>
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<td class="colLast">
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<div class="block">Constructs an instance of <code>PNGEncodeParam.Palette</code>.</div>
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</td>
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<h3>Method Summary</h3>
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<table class="memberSummary">
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption>
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<tr>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colSecond" scope="col">Method</th>
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<th class="colLast" scope="col">Description</th>
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</tr>
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<tr id="i0" class="altColor">
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<td class="colFirst"><code>int</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getBackgroundPaletteIndex()">getBackgroundPaletteIndex</a></span>()</code></th>
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<td class="colLast">
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<div class="block">Returns the palette index of the suggested background color.</div>
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</td>
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</tr>
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<tr id="i1" class="rowColor">
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<td class="colFirst"><code>int[]</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getPalette()">getPalette</a></span>()</code></th>
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<td class="colLast">
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<div class="block">Returns the current RGB palette.</div>
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</td>
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</tr>
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<tr id="i2" class="altColor">
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<td class="colFirst"><code>byte[]</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getPaletteTransparency()">getPaletteTransparency</a></span>()</code></th>
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<td class="colLast">
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<div class="block">Returns the alpha values associated with each palette entry.</div>
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</td>
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</tr>
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<tr id="i3" class="rowColor">
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<td class="colFirst"><code>boolean</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isBackgroundSet()">isBackgroundSet</a></span>()</code></th>
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<td class="colLast">
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<div class="block">Returns true if a 'bKGD' chunk will be output.</div>
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</td>
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</tr>
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<tr id="i4" class="altColor">
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<td class="colFirst"><code>boolean</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isPaletteSet()">isPaletteSet</a></span>()</code></th>
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<td class="colLast">
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<div class="block">Returns true if a 'PLTE' chunk will be output.</div>
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</td>
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</tr>
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<tr id="i5" class="rowColor">
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<td class="colFirst"><code>void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setBackgroundPaletteIndex(int)">setBackgroundPaletteIndex</a></span>​(int index)</code></th>
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<td class="colLast">
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<div class="block">Sets the palette index of the suggested background color.</div>
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</td>
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</tr>
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<tr id="i6" class="altColor">
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<td class="colFirst"><code>void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setBitDepth(int)">setBitDepth</a></span>​(int bitDepth)</code></th>
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<td class="colLast">
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<div class="block">Sets the desired bit depth for a palette image.</div>
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</td>
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</tr>
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<tr id="i7" class="rowColor">
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<td class="colFirst"><code>void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setPalette(int%5B%5D)">setPalette</a></span>​(int[] rgb)</code></th>
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<td class="colLast">
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<div class="block">Sets the RGB palette of the image to be encoded.</div>
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</td>
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</tr>
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<tr id="i8" class="altColor">
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<td class="colFirst"><code>void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setPaletteTransparency(byte%5B%5D)">setPaletteTransparency</a></span>​(byte[] alpha)</code></th>
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<td class="colLast">
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<div class="block">Sets the alpha values associated with each palette entry.</div>
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</td>
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</tr>
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<tr id="i9" class="rowColor">
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<td class="colFirst"><code>void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#unsetBackground()">unsetBackground</a></span>()</code></th>
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<td class="colLast">
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<div class="block">Suppresses the 'bKGD' chunk from being output.</div>
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</td>
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</tr>
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<tr id="i10" class="altColor">
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<td class="colFirst"><code>void</code></td>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#unsetPalette()">unsetPalette</a></span>()</code></th>
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<td class="colLast">
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<div class="block">Suppresses the 'PLTE' chunk from being output.</div>
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</td>
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</tr>
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<h3>Methods inherited from class com.mxgraph.util.png.<a href="mxPngEncodeParam.html" title="class in com.mxgraph.util.png">mxPngEncodeParam</a></h3>
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<code><a href="mxPngEncodeParam.html#addPrivateChunk(java.lang.String,byte%5B%5D)">addPrivateChunk</a>, <a href="mxPngEncodeParam.html#filterRow(byte%5B%5D,byte%5B%5D,byte%5B%5D%5B%5D,int,int)">filterRow</a>, <a href="mxPngEncodeParam.html#getBitDepth()">getBitDepth</a>, <a href="mxPngEncodeParam.html#getChromaticity()">getChromaticity</a>, <a href="mxPngEncodeParam.html#getCompressedText()">getCompressedText</a>, <a href="mxPngEncodeParam.html#getDefaultEncodeParam(java.awt.image.RenderedImage)">getDefaultEncodeParam</a>, <a href="mxPngEncodeParam.html#getGamma()">getGamma</a>, <a href="mxPngEncodeParam.html#getICCProfileData()">getICCProfileData</a>, <a href="mxPngEncodeParam.html#getInterlacing()">getInterlacing</a>, <a href="mxPngEncodeParam.html#getModificationTime()">getModificationTime</a>, <a href="mxPngEncodeParam.html#getNumPrivateChunks()">getNumPrivateChunks</a>, <a href="mxPngEncodeParam.html#getPaletteHistogram()">getPaletteHistogram</a>, <a href="mxPngEncodeParam.html#getPhysicalDimension()">getPhysicalDimension</a>, <a href="mxPngEncodeParam.html#getPrivateChunkData(int)">getPrivateChunkData</a>, <a href="mxPngEncodeParam.html#getPrivateChunkType(int)">getPrivateChunkType</a>, <a href="mxPngEncodeParam.html#getSignificantBits()">getSignificantBits</a>, <a href="mxPngEncodeParam.html#getSRGBIntent()">getSRGBIntent</a>, <a href="mxPngEncodeParam.html#getText()">getText</a>, <a href="mxPngEncodeParam.html#isChromaticitySet()">isChromaticitySet</a>, <a href="mxPngEncodeParam.html#isCompressedTextSet()">isCompressedTextSet</a>, <a href="mxPngEncodeParam.html#isGammaSet()">isGammaSet</a>, <a href="mxPngEncodeParam.html#isICCProfileDataSet()">isICCProfileDataSet</a>, <a href="mxPngEncodeParam.html#isModificationTimeSet()">isModificationTimeSet</a>, <a href="mxPngEncodeParam.html#isPaletteHistogramSet()">isPaletteHistogramSet</a>, <a href="mxPngEncodeParam.html#isPhysicalDimensionSet()">isPhysicalDimensionSet</a>, <a href="mxPngEncodeParam.html#isSignificantBitsSet()">isSignificantBitsSet</a>, <a href="mxPngEncodeParam.html#isSRGBIntentSet()">isSRGBIntentSet</a>, <a href="mxPngEncodeParam.html#isSuggestedPaletteSet()">isSuggestedPaletteSet</a>, <a href="mxPngEncodeParam.html#isTextSet()">isTextSet</a>, <a href="mxPngEncodeParam.html#isTransparencySet()">isTransparencySet</a>, <a href="mxPngEncodeParam.html#paethPredictor(int,int,int)">paethPredictor</a>, <a href="mxPngEncodeParam.html#removeAllPrivateChunks()">removeAllPrivateChunks</a>, <a href="mxPngEncodeParam.html#removeUnsafeToCopyPrivateChunks()">removeUnsafeToCopyPrivateChunks</a>, <a href="mxPngEncodeParam.html#setChromaticity(float%5B%5D)">setChromaticity</a>, <a href="mxPngEncodeParam.html#setChromaticity(float,float,float,float,float,float,float,float)">setChromaticity</a>, <a href="mxPngEncodeParam.html#setCompressedText(java.lang.String%5B%5D)">setCompressedText</a>, <a href="mxPngEncodeParam.html#setGamma(float)">setGamma</a>, <a href="mxPngEncodeParam.html#setICCProfileData(byte%5B%5D)">setICCProfileData</a>, <a href="mxPngEncodeParam.html#setInterlacing(boolean)">setInterlacing</a>, <a href="mxPngEncodeParam.html#setModificationTime(java.util.Date)">setModificationTime</a>, <a href="mxPngEncodeParam.html#setPaletteHistogram(int%5B%5D)">setPaletteHistogram</a>, <a href="mxPngEncodeParam.html#setPhysicalDimension(int%5B%5D)">setPhysicalDimension</a>, <a href="mxPngEncodeParam.html#setPhysicalDimension(int,int,int)">setPhysicalDimension</a>, <a href="mxPngEncodeParam.html#setSignificantBits(int%5B%5D)">setSignificantBits</a>, <a href="mxPngEncodeParam.html#setSRGBIntent(int)">setSRGBIntent</a>, <a href="mxPngEncodeParam.html#setSuggestedPalette(com.mxgraph.util.png.mxPngSuggestedPaletteEntry%5B%5D)">setSuggestedPalette</a>, <a href="mxPngEncodeParam.html#setText(java.lang.String%5B%5D)">setText</a>, <a href="mxPngEncodeParam.html#unsetBitDepth()">unsetBitDepth</a>, <a href="mxPngEncodeParam.html#unsetChromaticity()">unsetChromaticity</a>, <a href="mxPngEncodeParam.html#unsetCompressedText()">unsetCompressedText</a>, <a href="mxPngEncodeParam.html#unsetGamma()">unsetGamma</a>, <a href="mxPngEncodeParam.html#unsetICCProfileData()">unsetICCProfileData</a>, <a href="mxPngEncodeParam.html#unsetModificationTime()">unsetModificationTime</a>, <a href="mxPngEncodeParam.html#unsetPaletteHistogram()">unsetPaletteHistogram</a>, <a href="mxPngEncodeParam.html#unsetPhysicalDimension()">unsetPhysicalDimension</a>, <a href="mxPngEncodeParam.html#unsetSignificantBits()">unsetSignificantBits</a>, <a href="mxPngEncodeParam.html#unsetSRGBIntent()">unsetSRGBIntent</a>, <a href="mxPngEncodeParam.html#unsetSuggestedPalette()">unsetSuggestedPalette</a>, <a href="mxPngEncodeParam.html#unsetText()">unsetText</a>, <a href="mxPngEncodeParam.html#unsetTransparency()">unsetTransparency</a></code></li>
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<h3>Methods inherited from class java.lang.Object</h3>
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<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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</ul>
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<h4>Palette</h4>
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<pre>public Palette()</pre>
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<div class="block">Constructs an instance of <code>PNGEncodeParam.Palette</code>.</div>
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<h4>unsetBackground</h4>
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<pre class="methodSignature">public void unsetBackground()</pre>
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<div class="block">Suppresses the 'bKGD' chunk from being output.</div>
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<dl>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
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<dd><code><a href="mxPngEncodeParam.html#unsetBackground()">unsetBackground</a></code> in class <code><a href="mxPngEncodeParam.html" title="class in com.mxgraph.util.png">mxPngEncodeParam</a></code></dd>
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<pre class="methodSignature">public boolean isBackgroundSet()</pre>
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<div class="block">Returns true if a 'bKGD' chunk will be output.</div>
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<dl>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
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<dd><code><a href="mxPngEncodeParam.html#isBackgroundSet()">isBackgroundSet</a></code> in class <code><a href="mxPngEncodeParam.html" title="class in com.mxgraph.util.png">mxPngEncodeParam</a></code></dd>
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<pre class="methodSignature">public void setBitDepth​(int bitDepth)</pre>
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<div class="block">Sets the desired bit depth for a palette image. The bit
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depth must be one of 1, 2, 4, or 8, or else an
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<code>IllegalArgumentException</code> will be thrown.</div>
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<dl>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
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<dd><code><a href="mxPngEncodeParam.html#setBitDepth(int)">setBitDepth</a></code> in class <code><a href="mxPngEncodeParam.html" title="class in com.mxgraph.util.png">mxPngEncodeParam</a></code></dd>
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<pre class="methodSignature">public void setPalette​(int[] rgb)</pre>
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<div class="block">Sets the RGB palette of the image to be encoded.
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The <code>rgb</code> parameter contains alternating
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R, G, B values for each color index used in the image.
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The number of elements must be a multiple of 3 between
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3 and 3*256.
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<p> The 'PLTE' chunk will encode this information.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>rgb</code> - An array of <code>int</code>s.</dd>
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<pre class="methodSignature">public int[] getPalette()</pre>
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<div class="block">Returns the current RGB palette.
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<p> If the palette has not previously been set, or has been
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unset, an <code>IllegalStateException</code> will be thrown.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>An array of <code>int</code>s.</dd>
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<dt><span class="throwsLabel">Throws:</span></dt>
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<dd><code>java.lang.IllegalStateException</code> - if the palette is not set.</dd>
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<div class="block">Suppresses the 'PLTE' chunk from being output.</div>
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<pre class="methodSignature">public boolean isPaletteSet()</pre>
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<div class="block">Returns true if a 'PLTE' chunk will be output.</div>
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<pre class="methodSignature">public void setBackgroundPaletteIndex​(int index)</pre>
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<div class="block">Sets the palette index of the suggested background color.
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<p> The 'bKGD' chunk will encode this information.</div>
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</li>
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<pre class="methodSignature">public int getBackgroundPaletteIndex()</pre>
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<div class="block">Returns the palette index of the suggested background color.
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<p> If the background palette index has not previously been
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set, or has been unset, an
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<code>IllegalStateException</code> will be thrown.</div>
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<dl>
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<dt><span class="throwsLabel">Throws:</span></dt>
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<dd><code>java.lang.IllegalStateException</code> - if the palette index is not set.</dd>
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<h4>setPaletteTransparency</h4>
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<pre class="methodSignature">public void setPaletteTransparency​(byte[] alpha)</pre>
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<div class="block">Sets the alpha values associated with each palette entry.
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The <code>alpha</code> parameter should have as many entries
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as there are RGB triples in the palette.
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<p> The 'tRNS' chunk will encode this information.</div>
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</li>
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<pre class="methodSignature">public byte[] getPaletteTransparency()</pre>
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<div class="block">Returns the alpha values associated with each palette entry.
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<p> If the palette transparency has not previously been
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set, or has been unset, an
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<code>IllegalStateException</code> will be thrown.</div>
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<dl>
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<dt><span class="throwsLabel">Throws:</span></dt>
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<dd><code>java.lang.IllegalStateException</code> - if the palette transparency is
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not set.</dd>
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</section>
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