Package org.apache.xmlgraphics.image.codec.png

Class PNGImage

java.lang.Object
org.apache.xmlgraphics.image.codec.util.SimpleRenderedImage
org.apache.xmlgraphics.image.codec.png.PNGImage
All Implemented Interfaces:
RenderedImage, PNGConstants
class PNGImage extends SimpleRenderedImage implements PNGConstants
TO DO: zTXt chunks

  • Field Details

    • colorTypeNames

      private static final String[] colorTypeNames

    • bandOffsets

      private int[][] bandOffsets

    • bitDepth

      private int bitDepth

    • colorType

      private int colorType

    • compressionMethod

      private int compressionMethod

    • filterMethod

      private int filterMethod

    • interlaceMethod

      private int interlaceMethod

    • paletteEntries

      private int paletteEntries

    • redPalette

      private byte[] redPalette

    • greenPalette

      private byte[] greenPalette

    • bluePalette

      private byte[] bluePalette

    • alphaPalette

      private byte[] alphaPalette

    • bkgdRed

      private int bkgdRed

    • bkgdGreen

      private int bkgdGreen

    • bkgdBlue

      private int bkgdBlue

    • grayTransparentAlpha

      private int grayTransparentAlpha

    • redTransparentAlpha

      private int redTransparentAlpha

    • greenTransparentAlpha

      private int greenTransparentAlpha

    • blueTransparentAlpha

      private int blueTransparentAlpha

    • maxOpacity

      private int maxOpacity

    • significantBits

      private int[] significantBits

    • suppressAlpha

      private boolean suppressAlpha

    • expandPalette

      private boolean expandPalette

    • output8BitGray

      private boolean output8BitGray

    • outputHasAlphaPalette

      private boolean outputHasAlphaPalette

    • performGammaCorrection

      private boolean performGammaCorrection

    • expandGrayAlpha

      private boolean expandGrayAlpha

    • generateEncodeParam

      private boolean generateEncodeParam

    • decodeParam

      private PNGDecodeParam decodeParam

    • encodeParam

      private PNGEncodeParam encodeParam

    • emitProperties

      private boolean emitProperties

    • fileGamma

      private float fileGamma

    • userExponent

      private float userExponent

    • displayExponent

      private float displayExponent

    • chromaticity

      private float[] chromaticity

    • sRGBRenderingIntent

      private int sRGBRenderingIntent

    • postProcess

      private int postProcess

    • xPixelsPerUnit

      protected int xPixelsPerUnit

    • yPixelsPerUnit

      protected int yPixelsPerUnit

    • unitSpecifier

      protected int unitSpecifier

    • POST_NONE

      private static final int POST_NONE
      See Also:

    • POST_GAMMA

      private static final int POST_GAMMA
      See Also:

    • POST_GRAY_LUT

      private static final int POST_GRAY_LUT
      See Also:

    • POST_GRAY_LUT_ADD_TRANS

      private static final int POST_GRAY_LUT_ADD_TRANS
      See Also:

    • POST_PALETTE_TO_RGB

      private static final int POST_PALETTE_TO_RGB
      See Also:

    • POST_PALETTE_TO_RGBA

      private static final int POST_PALETTE_TO_RGBA
      See Also:

    • POST_ADD_GRAY_TRANS

      private static final int POST_ADD_GRAY_TRANS
      See Also:

    • POST_ADD_RGB_TRANS

      private static final int POST_ADD_RGB_TRANS
      See Also:

    • POST_REMOVE_GRAY_TRANS

      private static final int POST_REMOVE_GRAY_TRANS
      See Also:

    • POST_REMOVE_RGB_TRANS

      private static final int POST_REMOVE_RGB_TRANS
      See Also:

    • POST_EXP_MASK

      private static final int POST_EXP_MASK
      See Also:

    • POST_GRAY_ALPHA_EXP

      private static final int POST_GRAY_ALPHA_EXP
      See Also:

    • POST_GAMMA_EXP

      private static final int POST_GAMMA_EXP
      See Also:

    • POST_GRAY_LUT_ADD_TRANS_EXP

      private static final int POST_GRAY_LUT_ADD_TRANS_EXP
      See Also:

    • POST_ADD_GRAY_TRANS_EXP

      private static final int POST_ADD_GRAY_TRANS_EXP
      See Also:

    • streamVec

      private List<InputStream> streamVec

    • dataStream

      private DataInputStream dataStream

    • bytesPerPixel

      private int bytesPerPixel

    • inputBands

      private int inputBands

    • outputBands

      private int outputBands

    • chunkIndex

      private int chunkIndex

    • textKeys

      private List textKeys

    • textStrings

      private List textStrings

    • ztextKeys

      private List ztextKeys

    • ztextStrings

      private List ztextStrings

    • theTile

      private WritableRaster theTile

    • gammaLut

      private int[] gammaLut

    • expandBits

      private final byte[][] expandBits

    • grayLut

      private int[] grayLut

    • GrayBits8

      private static final int[] GrayBits8

    • colorModelGray8

      private static final ComponentColorModel colorModelGray8

    • GrayAlphaBits8

      private static final int[] GrayAlphaBits8

    • colorModelGrayAlpha8

      private static final ComponentColorModel colorModelGrayAlpha8

    • GrayBits16

      private static final int[] GrayBits16

    • colorModelGray16

      private static final ComponentColorModel colorModelGray16

    • GrayAlphaBits16

      private static final int[] GrayAlphaBits16

    • colorModelGrayAlpha16

      private static final ComponentColorModel colorModelGrayAlpha16

    • GrayBits32

      private static final int[] GrayBits32

    • colorModelGray32

      private static final ComponentColorModel colorModelGray32

    • GrayAlphaBits32

      private static final int[] GrayAlphaBits32

    • colorModelGrayAlpha32

      private static final ComponentColorModel colorModelGrayAlpha32

    • RGBBits8

      private static final int[] RGBBits8

    • colorModelRGB8

      private static final ComponentColorModel colorModelRGB8

    • RGBABits8

      private static final int[] RGBABits8

    • colorModelRGBA8

      private static final ComponentColorModel colorModelRGBA8

    • RGBBits16

      private static final int[] RGBBits16

    • colorModelRGB16

      private static final ComponentColorModel colorModelRGB16

    • RGBABits16

      private static final int[] RGBABits16

    • colorModelRGBA16

      private static final ComponentColorModel colorModelRGBA16

    • RGBBits32

      private static final int[] RGBBits32

    • colorModelRGB32

      private static final ComponentColorModel colorModelRGB32

    • RGBABits32

      private static final int[] RGBABits32

    • colorModelRGBA32

      private static final ComponentColorModel colorModelRGBA32

  • Constructor Details

  • Method Details

    • initGammaLut

      private void initGammaLut(int bits)

    • initGrayLut

      private void initGrayLut(int bits)

    • parse_IHDR_chunk

      private void parse_IHDR_chunk(PNGChunk chunk)

    • parse_IEND_chunk

      private void parse_IEND_chunk(PNGChunk chunk) throws Exception
      Throws:
      Exception

    • createComponentColorModel

      public static ColorModel createComponentColorModel(SampleModel sm)
      A convenience method to create an instance of ComponentColorModel suitable for use with the given SampleModel. The SampleModel should have a data type of DataBuffer.TYPE_BYTE, TYPE_USHORT, or TYPE_INT and between 1 and 4 bands. Depending on the number of bands of the SampleModel, either a gray, gray+alpha, rgb, or rgb+alpha ColorModel is returned.

    • parse_PLTE_chunk

      private void parse_PLTE_chunk(PNGChunk chunk)

    • parse_bKGD_chunk

      private void parse_bKGD_chunk(PNGChunk chunk)

    • parse_cHRM_chunk

      private void parse_cHRM_chunk(PNGChunk chunk)

    • parse_gAMA_chunk

      private void parse_gAMA_chunk(PNGChunk chunk)

    • parse_hIST_chunk

      private void parse_hIST_chunk(PNGChunk chunk)

    • parse_iCCP_chunk

      private void parse_iCCP_chunk(PNGChunk chunk)

    • parse_pHYs_chunk

      private void parse_pHYs_chunk(PNGChunk chunk)

    • parse_sBIT_chunk

      private void parse_sBIT_chunk(PNGChunk chunk)

    • parse_sRGB_chunk

      private void parse_sRGB_chunk(PNGChunk chunk)

    • parse_tEXt_chunk

      private void parse_tEXt_chunk(PNGChunk chunk)

    • parse_tIME_chunk

      private void parse_tIME_chunk(PNGChunk chunk)

    • parse_tRNS_chunk

      private void parse_tRNS_chunk(PNGChunk chunk)

    • parse_zTXt_chunk

      private void parse_zTXt_chunk(PNGChunk chunk)

    • createRaster

      private WritableRaster createRaster(int width, int height, int bands, int scanlineStride, int bitDepth)

    • decodeSubFilter

      private static void decodeSubFilter(byte[] curr, int count, int bpp)

    • decodeUpFilter

      private static void decodeUpFilter(byte[] curr, byte[] prev, int count)

    • decodeAverageFilter

      private static void decodeAverageFilter(byte[] curr, byte[] prev, int count, int bpp)

    • decodePaethFilter

      private static void decodePaethFilter(byte[] curr, byte[] prev, int count, int bpp)

    • processPixels

      private void processPixels(int process, Raster src, WritableRaster dst, int xOffset, int step, int y, int width)

    • decodePass

      private void decodePass(WritableRaster imRas, int xOffset, int yOffset, int xStep, int yStep, int passWidth, int passHeight)
      Reads in an image of a given size and returns it as a WritableRaster.

    • decodeImage

      private void decodeImage(boolean useInterlacing)

    • getTile

      public Raster getTile(int tileX, int tileY)
      Specified by:
      getTile in interface RenderedImage