Module java.desktop
Package javax.imageio

Class ImageTypeSpecifier

java.lang.Object
javax.imageio.ImageTypeSpecifier
public class ImageTypeSpecifier extends Object
A class that allows the format of an image (in particular, its SampleModel and ColorModel) to be specified in a convenient manner.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected ColorModel
    colorModel
    The ColorModel to be used as a prototype.
    protected SampleModel
    sampleModel
    A SampleModel to be used as a prototype.

  • Constructor Summary

    Constructors
    Constructor
    Description
    ImageTypeSpecifier(ColorModel colorModel, SampleModel sampleModel)
    Constructs an ImageTypeSpecifier directly from a ColorModel and a SampleModel.
    ImageTypeSpecifier(RenderedImage image)
    Constructs an ImageTypeSpecifier from a RenderedImage.

  • Method Summary

    Modifier and Type
    Method
    Description
    static ImageTypeSpecifier
    createBanded(ColorSpace colorSpace, int[] bankIndices, int[] bandOffsets, int dataType, boolean hasAlpha, boolean isAlphaPremultiplied)
    Returns a specifier for a banded image format that will use a ComponentColorModel and a BandedSampleModel to store each channel in a separate array.
    BufferedImage
    createBufferedImage(int width, int height)
    Creates a BufferedImage with a given width and height according to the specification embodied in this object.
    static ImageTypeSpecifier
    createFromBufferedImageType(int bufferedImageType)
    Returns an ImageTypeSpecifier that encodes one of the standard BufferedImage types (other than TYPE_CUSTOM).
    static ImageTypeSpecifier
    createFromRenderedImage(RenderedImage image)
    Returns an ImageTypeSpecifier that encodes the layout of a RenderedImage (which may be a BufferedImage).
    static ImageTypeSpecifier
    createGrayscale(int bits, int dataType, boolean isSigned)
    Returns a specifier for a grayscale image format that will pack pixels of the given bit depth into array elements of the specified data type.
    static ImageTypeSpecifier
    createGrayscale(int bits, int dataType, boolean isSigned, boolean isAlphaPremultiplied)
    Returns a specifier for a grayscale plus alpha image format that will pack pixels of the given bit depth into array elements of the specified data type.
    static ImageTypeSpecifier
    createIndexed(byte[] redLUT, byte[] greenLUT, byte[] blueLUT, byte[] alphaLUT, int bits, int dataType)
    Returns a specifier for an indexed-color image format that will pack index values of the given bit depth into array elements of the specified data type.
    static ImageTypeSpecifier
    createInterleaved(ColorSpace colorSpace, int[] bandOffsets, int dataType, boolean hasAlpha, boolean isAlphaPremultiplied)
    Returns a specifier for an interleaved image format that will use a ComponentColorModel and a PixelInterleavedSampleModel to store each pixel component in a separate byte, short, or int.
    static ImageTypeSpecifier
    createPacked(ColorSpace colorSpace, int redMask, int greenMask, int blueMask, int alphaMask, int transferType, boolean isAlphaPremultiplied)
    Returns a specifier for a packed image format that will use a DirectColorModel and a packed SampleModel to store each pixel packed into in a single byte, short, or int.
    boolean
    equals(Object o)
    Returns true if the given Object is an ImageTypeSpecifier and has a SampleModel and ColorModel that are equal to those of this object.
    int
    getBitsPerBand(int band)
    Return the number of bits used to represent samples of the given band.
    int
    getBufferedImageType()
    Returns an int containing one of the enumerated constant values describing image formats from BufferedImage.
    ColorModel
    getColorModel()
    Returns the ColorModel specified by this object.
    int
    getNumBands()
    Return the number of bands specified by this object.
    int
    getNumComponents()
    Return the number of color components specified by this object.
    SampleModel
    getSampleModel()
    Returns a SampleModel based on the settings encapsulated within this object.
    SampleModel
    getSampleModel(int width, int height)
    Returns a SampleModel based on the settings encapsulated within this object.
    int
    hashCode()
    Returns the hash code for this ImageTypeSpecifier.

    Methods declared in class java.lang.Object

    clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • colorModel

      protected ColorModel colorModel
      The ColorModel to be used as a prototype.

    • sampleModel

      protected SampleModel sampleModel
      A SampleModel to be used as a prototype.

  • Constructor Details

    • ImageTypeSpecifier

      public ImageTypeSpecifier(ColorModel colorModel, SampleModel sampleModel)
      Constructs an ImageTypeSpecifier directly from a ColorModel and a SampleModel. It is the caller's responsibility to supply compatible parameters.
      Parameters:
      colorModel - a ColorModel.
      sampleModel - a SampleModel.
      Throws:
      IllegalArgumentException - if either parameter is null.
      IllegalArgumentException - if sampleModel is not compatible with colorModel.

    • ImageTypeSpecifier

      public ImageTypeSpecifier(RenderedImage image)
      Constructs an ImageTypeSpecifier from a RenderedImage. If a BufferedImage is being used, one of the factory methods createFromRenderedImage or createFromBufferedImageType should be used instead in order to get a more accurate result.
      Parameters:
      image - a RenderedImage.
      Throws:
      IllegalArgumentException - if the argument is null.

  • Method Details

    • createPacked

      public static ImageTypeSpecifier createPacked(ColorSpace colorSpace, int redMask, int greenMask, int blueMask, int alphaMask, int transferType, boolean isAlphaPremultiplied)
      Returns a specifier for a packed image format that will use a DirectColorModel and a packed SampleModel to store each pixel packed into in a single byte, short, or int.
      Parameters:
      colorSpace - the desired ColorSpace.
      redMask - a contiguous mask indicated the position of the red channel.
      greenMask - a contiguous mask indicated the position of the green channel.
      blueMask - a contiguous mask indicated the position of the blue channel.
      alphaMask - a contiguous mask indicated the position of the alpha channel.
      transferType - the desired SampleModel transfer type.
      isAlphaPremultiplied - true if the color channels will be premultipled by the alpha channel.
      Returns:
      an ImageTypeSpecifier with the desired characteristics.
      Throws:
      IllegalArgumentException - if colorSpace is null.
      IllegalArgumentException - if colorSpace is not of type TYPE_RGB.
      IllegalArgumentException - if no mask has at least 1 bit set.
      IllegalArgumentException - if transferType if not one of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT, or DataBuffer.TYPE_INT.

    • createInterleaved

      public static ImageTypeSpecifier createInterleaved(ColorSpace colorSpace, int[] bandOffsets, int dataType, boolean hasAlpha, boolean isAlphaPremultiplied)
      Returns a specifier for an interleaved image format that will use a ComponentColorModel and a PixelInterleavedSampleModel to store each pixel component in a separate byte, short, or int.
      Parameters:
      colorSpace - the desired ColorSpace.
      bandOffsets - an array of ints indicating the offsets for each band.
      dataType - the desired data type, as one of the enumerations from the DataBuffer class.
      hasAlpha - true if an alpha channel is desired.
      isAlphaPremultiplied - true if the color channels will be premultipled by the alpha channel.
      Returns:
      an ImageTypeSpecifier with the desired characteristics.
      Throws:
      IllegalArgumentException - if colorSpace is null.
      IllegalArgumentException - if bandOffsets is null.
      IllegalArgumentException - if dataType is not one of the legal DataBuffer.TYPE_* constants.
      IllegalArgumentException - if bandOffsets.length does not equal the number of color space components, plus 1 if hasAlpha is true.

    • createBanded

      public static ImageTypeSpecifier createBanded(ColorSpace colorSpace, int[] bankIndices, int[] bandOffsets, int dataType, boolean hasAlpha, boolean isAlphaPremultiplied)
      Returns a specifier for a banded image format that will use a ComponentColorModel and a BandedSampleModel to store each channel in a separate array.
      Parameters:
      colorSpace - the desired ColorSpace.
      bankIndices - an array of ints indicating the bank in which each band will be stored.
      bandOffsets - an array of ints indicating the starting offset of each band within its bank.
      dataType - the desired data type, as one of the enumerations from the DataBuffer class.
      hasAlpha - true if an alpha channel is desired.
      isAlphaPremultiplied - true if the color channels will be premultipled by the alpha channel.
      Returns:
      an ImageTypeSpecifier with the desired characteristics.
      Throws:
      IllegalArgumentException - if colorSpace is null.
      IllegalArgumentException - if bankIndices is null.
      IllegalArgumentException - if bandOffsets is null.
      IllegalArgumentException - if the lengths of bankIndices and bandOffsets differ.
      IllegalArgumentException - if bandOffsets.length does not equal the number of color space components, plus 1 if hasAlpha is true.
      IllegalArgumentException - if dataType is not one of the legal DataBuffer.TYPE_* constants.

    • createGrayscale

      public static ImageTypeSpecifier createGrayscale(int bits, int dataType, boolean isSigned)
      Returns a specifier for a grayscale image format that will pack pixels of the given bit depth into array elements of the specified data type.
      Parameters:
      bits - the number of bits per gray value (1, 2, 4, 8, or 16).
      dataType - the desired data type, as one of the enumerations from the DataBuffer class.
      isSigned - true if negative values are to be represented.
      Returns:
      an ImageTypeSpecifier with the desired characteristics.
      Throws:
      IllegalArgumentException - if bits is not one of 1, 2, 4, 8, or 16.
      IllegalArgumentException - if dataType is not one of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_SHORT, or DataBuffer.TYPE_USHORT.
      IllegalArgumentException - if bits is larger than the bit size of the given dataType.

    • createGrayscale

      public static ImageTypeSpecifier createGrayscale(int bits, int dataType, boolean isSigned, boolean isAlphaPremultiplied)
      Returns a specifier for a grayscale plus alpha image format that will pack pixels of the given bit depth into array elements of the specified data type.
      Parameters:
      bits - the number of bits per gray value (1, 2, 4, 8, or 16).
      dataType - the desired data type, as one of the enumerations from the DataBuffer class.
      isSigned - true if negative values are to be represented.
      isAlphaPremultiplied - true if the luminance channel will be premultipled by the alpha channel.
      Returns:
      an ImageTypeSpecifier with the desired characteristics.
      Throws:
      IllegalArgumentException - if bits is not one of 1, 2, 4, 8, or 16.
      IllegalArgumentException - if dataType is not one of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_SHORT, or DataBuffer.TYPE_USHORT.
      IllegalArgumentException - if bits is larger than the bit size of the given dataType.

    • createIndexed

      public static ImageTypeSpecifier createIndexed(byte[] redLUT, byte[] greenLUT, byte[] blueLUT, byte[] alphaLUT, int bits, int dataType)
      Returns a specifier for an indexed-color image format that will pack index values of the given bit depth into array elements of the specified data type.
      Parameters:
      redLUT - an array of bytes containing the red values for each index.
      greenLUT - an array of bytes containing * the green values for each index.
      blueLUT - an array of bytes containing the blue values for each index.
      alphaLUT - an array of bytes containing the alpha values for each index, or null to create a fully opaque LUT.
      bits - the number of bits in each index.
      dataType - the desired output type, as one of the enumerations from the DataBuffer class.
      Returns:
      an ImageTypeSpecifier with the desired characteristics.
      Throws:
      IllegalArgumentException - if redLUT is null.
      IllegalArgumentException - if greenLUT is null.
      IllegalArgumentException - if blueLUT is null.
      IllegalArgumentException - if bits is not one of 1, 2, 4, 8, or 16.
      IllegalArgumentException - if the non-null LUT parameters do not have lengths of exactly 1 << bits.
      IllegalArgumentException - if dataType is not one of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_SHORT, DataBuffer.TYPE_USHORT, or DataBuffer.TYPE_INT.
      IllegalArgumentException - if bits is larger than the bit size of the given dataType.

    • createFromBufferedImageType

      public static ImageTypeSpecifier createFromBufferedImageType(int bufferedImageType)
      Returns an ImageTypeSpecifier that encodes one of the standard BufferedImage types (other than TYPE_CUSTOM).
      Parameters:
      bufferedImageType - an int representing one of the standard BufferedImage types.
      Returns:
      an ImageTypeSpecifier with the desired characteristics.
      Throws:
      IllegalArgumentException - if bufferedImageType is not one of the standard types, or is equal to TYPE_CUSTOM.
      See Also:

    • createFromRenderedImage

      public static ImageTypeSpecifier createFromRenderedImage(RenderedImage image)
      Returns an ImageTypeSpecifier that encodes the layout of a RenderedImage (which may be a BufferedImage).
      Parameters:
      image - a RenderedImage.
      Returns:
      an ImageTypeSpecifier with the desired characteristics.
      Throws:
      IllegalArgumentException - if image is null.

    • getBufferedImageType

      public int getBufferedImageType()
      Returns an int containing one of the enumerated constant values describing image formats from BufferedImage.
      Returns:
      an int representing a BufferedImage type.
      See Also:

    • getNumComponents

      public int getNumComponents()
      Return the number of color components specified by this object. This is the same value as returned by ColorModel.getNumComponents
      Returns:
      the number of components in the image.

    • getNumBands

      public int getNumBands()
      Return the number of bands specified by this object. This is the same value as returned by SampleModel.getNumBands
      Returns:
      the number of bands in the image.

    • getBitsPerBand

      public int getBitsPerBand(int band)
      Return the number of bits used to represent samples of the given band.
      Parameters:
      band - the index of the band to be queried, as an int.
      Returns:
      an int specifying a number of bits.
      Throws:
      IllegalArgumentException - if band is negative or greater than the largest band index.

    • getSampleModel

      public SampleModel getSampleModel()
      Returns a SampleModel based on the settings encapsulated within this object. The width and height of the SampleModel will be set to arbitrary values.
      Returns:
      a SampleModel with arbitrary dimensions.

    • getSampleModel

      public SampleModel getSampleModel(int width, int height)
      Returns a SampleModel based on the settings encapsulated within this object. The width and height of the SampleModel will be set to the supplied values.
      Parameters:
      width - the desired width of the returned SampleModel.
      height - the desired height of the returned SampleModel.
      Returns:
      a SampleModel with the given dimensions.
      Throws:
      IllegalArgumentException - if either width or height are negative or zero.
      IllegalArgumentException - if the product of width and height is greater than Integer.MAX_VALUE

    • getColorModel

      public ColorModel getColorModel()
      Returns the ColorModel specified by this object.
      Returns:
      a ColorModel.

    • createBufferedImage

      public BufferedImage createBufferedImage(int width, int height)
      Creates a BufferedImage with a given width and height according to the specification embodied in this object.
      Parameters:
      width - the desired width of the returned BufferedImage.
      height - the desired height of the returned BufferedImage.
      Returns:
      a new BufferedImage
      Throws:
      IllegalArgumentException - if either width or height are negative or zero.
      IllegalArgumentException - if the product of width and height is greater than Integer.MAX_VALUE, or if the number of array elements needed to store the image is greater than Integer.MAX_VALUE.

    • equals

      public boolean equals(Object o)
      Returns true if the given Object is an ImageTypeSpecifier and has a SampleModel and ColorModel that are equal to those of this object.
      Overrides:
      equals in class Object
      Parameters:
      o - the Object to be compared for equality.
      Returns:
      true if the given object is an equivalent ImageTypeSpecifier.
      See Also:

    • hashCode

      public int hashCode()
      Returns the hash code for this ImageTypeSpecifier.
      Overrides:
      hashCode in class Object
      Returns:
      a hash code for this ImageTypeSpecifier
      See Also: