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## com.mxgraph.util.png
Class mxPngEncodeParam.RGB

    java.lang.Object
      com.mxgraph.util.png.mxPngEncodeParam
          com.mxgraph.util.png.mxPngEncodeParam.RGB

Enclosing class:
  mxPngEncodeParam

    public static class mxPngEncodeParam.RGB

extends mxPngEncodeParam

Nested Class Summary

Nested classes/interfaces inherited from class com.mxgraph.util.png.mxPngEncodeParam
`mxPngEncodeParam.Gray, mxPngEncodeParam.Palette, mxPngEncodeParam.RGB`

Field Summary

Fields inherited from class com.mxgraph.util.png.mxPngEncodeParam
`bitDepth, bitDepthSet, INTENT_ABSOLUTE, INTENT_PERCEPTUAL, INTENT_RELATIVE, INTENT_SATURATION, PNG_FILTER_AVERAGE, PNG_FILTER_NONE, PNG_FILTER_PAETH, PNG_FILTER_SUB, PNG_FILTER_UP`

Constructor Summary
`mxPngEncodeParam.RGB()` Constructs an instance of `PNGEncodeParam.RGB`.

Method Summary
`int[]` | `getBackgroundRGB()` Returns the RGB value of the suggested background color.
`int[]` | `getTransparentRGB()` Returns the RGB value to be used to denote transparency.
`boolean` | `isBackgroundSet()` Returns true if a 'bKGD' chunk will be output.
`void` | `setBackgroundRGB(int[] rgb)` Sets the RGB value of the suggested background color.
`void` | `setBitDepth(int bitDepth)` Sets the desired bit depth for an RGB image.
`void` | `setTransparentRGB(int[] transparentRGB)` Sets the RGB value to be used to denote transparency.
`void` | `unsetBackground()` Suppresses the 'bKGD' chunk from being output.

Methods inherited from class com.mxgraph.util.png.mxPngEncodeParam
`addPrivateChunk, filterRow, getBitDepth, getChromaticity, getCompressedText, getDefaultEncodeParam, getGamma, getICCProfileData, getInterlacing, getModificationTime, getNumPrivateChunks, getPaletteHistogram, getPhysicalDimension, getPrivateChunkData, getPrivateChunkType, getSignificantBits, getSRGBIntent, getText, isChromaticitySet, isCompressedTextSet, isGammaSet, isICCProfileDataSet, isModificationTimeSet, isPaletteHistogramSet, isPhysicalDimensionSet, isSignificantBitsSet, isSRGBIntentSet, isSuggestedPaletteSet, isTextSet, isTransparencySet, paethPredictor, removeAllPrivateChunks, removeUnsafeToCopyPrivateChunks, setChromaticity, setChromaticity, setCompressedText, setGamma, setICCProfileData, setInterlacing, setModificationTime, setPaletteHistogram, setPhysicalDimension, setPhysicalDimension, setSignificantBits, setSRGBIntent, setSuggestedPalette, setText, unsetBitDepth, unsetChromaticity, unsetCompressedText, unsetGamma, unsetICCProfileData, unsetModificationTime, unsetPaletteHistogram, unsetPhysicalDimension, unsetSignificantBits, unsetSRGBIntent, unsetSuggestedPalette, unsetText, unsetTransparency`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### mxPngEncodeParam.RGB

    public mxPngEncodeParam.RGB()

  Constructs an instance of `PNGEncodeParam.RGB`.

Method Detail

### unsetBackground

    public void unsetBackground()

  Suppresses the 'bKGD' chunk from being output.

  Overrides:
    `unsetBackground` in class `mxPngEncodeParam`

### isBackgroundSet

    public boolean isBackgroundSet()

  Returns true if a 'bKGD' chunk will be output.

  Overrides:
    `isBackgroundSet` in class `mxPngEncodeParam`

### setBitDepth

    public void setBitDepth(int bitDepth)

  Sets the desired bit depth for an RGB image. The bit depth must be 8 or 16.

  Specified by:
    `setBitDepth` in class `mxPngEncodeParam`

### setBackgroundRGB

    public void setBackgroundRGB(int[] rgb)

  Sets the RGB value of the suggested background color. The `rgb` parameter should have 3 entries.

  The 'bKGD' chunk will encode this information.

### getBackgroundRGB

    public int[] getBackgroundRGB()

  Returns the RGB value of the suggested background color.

  If the background color has not previously been set, or has been unset, an `IllegalStateException` will be thrown.

  Throws:
    `IllegalStateException` - if the background color is not set.

### setTransparentRGB

    public void setTransparentRGB(int[] transparentRGB)

  Sets the RGB value to be used to denote transparency.

  Setting this attribute will cause the alpha channel of the input image to be ignored.

  The 'tRNS' chunk will encode this information.

### getTransparentRGB

    public int[] getTransparentRGB()

  Returns the RGB value to be used to denote transparency.

  If the transparent color has not previously been set, or has been unset, an `IllegalStateException` will be thrown.

  Throws:
    `IllegalStateException` - if the transparent color is not set.

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Copyright (c) 2010 Gaudenz Alder. All rights reserved.