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package java.awt.image;

import java.awt.color.ColorSpace;
import java.awt.Transparency;

The DirectColorModel class is a ColorModel
class that works with pixel values that represent RGB
color and alpha information as separate samples and that pack all
samples for a single pixel into a single int, short, or byte quantity.
This class can be used only with ColorSpaces of type ColorSpace.TYPE_RGB.
In addition, for each component of the ColorSpace, the minimum
normalized component value obtained via the getMinValue()
method of ColorSpace must be 0.0, and the maximum value obtained via
the getMaxValue() method must be 1.0 (these min/max
values are typical for RGB spaces).
There must be three color samples in the pixel values and there can
be a single alpha sample.  For those methods that use a primitive array
pixel representation of type transferType, the array
length is always one.  The transfer
types supported are DataBuffer.TYPE_BYTE,
DataBuffer.TYPE_USHORT, and DataBuffer.TYPE_INT.
Color and alpha samples are stored in the single
element of the array in bits indicated by bit masks.  Each bit mask
must be contiguous and masks must not overlap.  The same masks apply to
the single int pixel representation used by other methods.  The
correspondence of masks and color/alpha samples is as follows:

 Masks are identified by indices running from 0 through 2
if no alpha is present, or 3 if an alpha is present.
 The first three indices refer to color samples;
index 0 corresponds to red, index 1 to green, and index 2 to blue.
 Index 3 corresponds to the alpha sample, if present.


The translation from pixel values to color/alpha components for
display or processing purposes is a one-to-one correspondence of
samples to components.  A DirectColorModel is
typically used with image data which uses masks to define packed
samples.  For example, a DirectColorModel can be used in
conjunction with a SinglePixelPackedSampleModel to construct a BufferedImage. Normally the masks used by the SampleModel and the ColorModel would be the
same.  However, if they are different, the color interpretation
of pixel data will be done according to the masks of the
ColorModel.

A single int pixel representation is valid for all objects of this
class, since it is always possible to represent pixel values used with
this class in a single int.  Therefore, methods which use this
representation will not throw an IllegalArgumentException
due to an invalid pixel value.
 This color model is similar to an X11 TrueColor visual. The default RGB ColorModel specified by the getRGBdefault method is a DirectColorModel with the following parameters:
Number of bits:        32
Red mask:              0x00ff0000
Green mask:            0x0000ff00
Blue mask:             0x000000ff
Alpha mask:            0xff000000
Color space:           sRGB
isAlphaPremultiplied:  False
Transparency:          Transparency.TRANSLUCENT
transferType:          DataBuffer.TYPE_INT


Many of the methods in this class are final. This is because the
underlying native graphics code makes assumptions about the layout
and operation of this class and those assumptions are reflected in
the implementations of the methods here that are marked final.  You
can subclass this class for other reasons, but you cannot override
or modify the behavior of those methods.
See Also:
ColorModel
ColorSpace
SinglePixelPackedSampleModel
BufferedImage
ColorModel.getRGBdefault/**
 * The <code>DirectColorModel</code> class is a <code>ColorModel</code>
 * class that works with pixel values that represent RGB
 * color and alpha information as separate samples and that pack all
 * samples for a single pixel into a single int, short, or byte quantity.
 * This class can be used only with ColorSpaces of type ColorSpace.TYPE_RGB.
 * In addition, for each component of the ColorSpace, the minimum
 * normalized component value obtained via the <code>getMinValue()</code>
 * method of ColorSpace must be 0.0, and the maximum value obtained via
 * the <code>getMaxValue()</code> method must be 1.0 (these min/max
 * values are typical for RGB spaces).
 * There must be three color samples in the pixel values and there can
 * be a single alpha sample.  For those methods that use a primitive array
 * pixel representation of type <code>transferType</code>, the array
 * length is always one.  The transfer
 * types supported are DataBuffer.TYPE_BYTE,
 * DataBuffer.TYPE_USHORT, and DataBuffer.TYPE_INT.
 * Color and alpha samples are stored in the single
 * element of the array in bits indicated by bit masks.  Each bit mask
 * must be contiguous and masks must not overlap.  The same masks apply to
 * the single int pixel representation used by other methods.  The
 * correspondence of masks and color/alpha samples is as follows:
 * <ul>
 * <li> Masks are identified by indices running from 0 through 2
 * if no alpha is present, or 3 if an alpha is present.
 * <li> The first three indices refer to color samples;
 * index 0 corresponds to red, index 1 to green, and index 2 to blue.
 * <li> Index 3 corresponds to the alpha sample, if present.
 * </ul>
 * <p>
 * The translation from pixel values to color/alpha components for
 * display or processing purposes is a one-to-one correspondence of
 * samples to components.  A <code>DirectColorModel</code> is
 * typically used with image data which uses masks to define packed
 * samples.  For example, a <code>DirectColorModel</code> can be used in
 * conjunction with a <code>SinglePixelPackedSampleModel</code> to
 * construct a {@link BufferedImage}.  Normally the masks used by the
 * {@link SampleModel} and the <code>ColorModel</code> would be the
 * same.  However, if they are different, the color interpretation
 * of pixel data will be done according to the masks of the
 * <code>ColorModel</code>.
 * <p>
 * A single int pixel representation is valid for all objects of this
 * class, since it is always possible to represent pixel values used with
 * this class in a single int.  Therefore, methods which use this
 * representation will not throw an <code>IllegalArgumentException</code>
 * due to an invalid pixel value.
 * <p>
 * This color model is similar to an X11 TrueColor visual.
 * The default RGB ColorModel specified by the
 * {@link ColorModel#getRGBdefault() getRGBdefault} method is a
 * <code>DirectColorModel</code> with the following parameters:
 * <pre>
 * Number of bits:        32
 * Red mask:              0x00ff0000
 * Green mask:            0x0000ff00
 * Blue mask:             0x000000ff
 * Alpha mask:            0xff000000
 * Color space:           sRGB
 * isAlphaPremultiplied:  False
 * Transparency:          Transparency.TRANSLUCENT
 * transferType:          DataBuffer.TYPE_INT
 * </pre>
 * <p>
 * Many of the methods in this class are final. This is because the
 * underlying native graphics code makes assumptions about the layout
 * and operation of this class and those assumptions are reflected in
 * the implementations of the methods here that are marked final.  You
 * can subclass this class for other reasons, but you cannot override
 * or modify the behavior of those methods.
 *
 * @see ColorModel
 * @see ColorSpace
 * @see SinglePixelPackedSampleModel
 * @see BufferedImage
 * @see ColorModel#getRGBdefault
 *
 */
public class DirectColorModel extends PackedColorModel {
    private int red_mask;
    private int green_mask;
    private int blue_mask;
    private int alpha_mask;
    private int red_offset;
    private int green_offset;
    private int blue_offset;
    private int alpha_offset;
    private int red_scale;
    private int green_scale;
    private int blue_scale;
    private int alpha_scale;
    private boolean is_LinearRGB;
    private int lRGBprecision;
    private byte[] tosRGB8LUT;
    private byte[] fromsRGB8LUT8;
    private short[] fromsRGB8LUT16;

    
Constructs a DirectColorModel from the specified masks
that indicate which bits in an int pixel representation
contain the red, green and blue color samples.  As pixel values do not
contain alpha information, all pixels are treated as opaque, which
means that alpha = 1.0.  All of the bits
in each mask must be contiguous and fit in the specified number
of least significant bits of an int pixel representation.
 The ColorSpace is the default sRGB space. The
transparency value is Transparency.OPAQUE.  The transfer type
is the smallest of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT,
or DataBuffer.TYPE_INT that can hold a single pixel.
Params:
bits – the number of bits in the pixel values; for example,
        the sum of the number of bits in the masks.
rmask – specifies a mask indicating which bits in an
        integer pixel contain the red component
gmask – specifies a mask indicating which bits in an
        integer pixel contain the green component
bmask – specifies a mask indicating which bits in an
        integer pixel contain the blue component/**
     * Constructs a <code>DirectColorModel</code> from the specified masks
     * that indicate which bits in an <code>int</code> pixel representation
     * contain the red, green and blue color samples.  As pixel values do not
     * contain alpha information, all pixels are treated as opaque, which
     * means that alpha&nbsp;=&nbsp;1.0.  All of the bits
     * in each mask must be contiguous and fit in the specified number
     * of least significant bits of an <code>int</code> pixel representation.
     *  The <code>ColorSpace</code> is the default sRGB space. The
     * transparency value is Transparency.OPAQUE.  The transfer type
     * is the smallest of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT,
     * or DataBuffer.TYPE_INT that can hold a single pixel.
     * @param bits the number of bits in the pixel values; for example,
     *         the sum of the number of bits in the masks.
     * @param rmask specifies a mask indicating which bits in an
     *         integer pixel contain the red component
     * @param gmask specifies a mask indicating which bits in an
     *         integer pixel contain the green component
     * @param bmask specifies a mask indicating which bits in an
     *         integer pixel contain the blue component
     *
     */
    public DirectColorModel(int bits,
                            int rmask, int gmask, int bmask) {
        this(bits, rmask, gmask, bmask, 0);
    }

    
Constructs a DirectColorModel from the specified masks
that indicate which bits in an int pixel representation
contain the red, green and blue color samples and the alpha sample,
if present.  If amask is 0, pixel values do not contain
alpha information and all pixels are treated as opaque, which means
that alpha = 1.0.  All of the bits in each mask must
be contiguous and fit in the specified number of least significant bits
of an int pixel representation.  Alpha, if present, is not
premultiplied.  The ColorSpace is the default sRGB space.
The transparency value is Transparency.OPAQUE if no alpha is
present, or Transparency.TRANSLUCENT otherwise.  The transfer type
is the smallest of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT,
or DataBuffer.TYPE_INT that can hold a single pixel.
Params:
bits – the number of bits in the pixel values; for example,
        the sum of the number of bits in the masks.
rmask – specifies a mask indicating which bits in an
        integer pixel contain the red component
gmask – specifies a mask indicating which bits in an
        integer pixel contain the green component
bmask – specifies a mask indicating which bits in an
        integer pixel contain the blue component
amask – specifies a mask indicating which bits in an
        integer pixel contain the alpha component/**
     * Constructs a <code>DirectColorModel</code> from the specified masks
     * that indicate which bits in an <code>int</code> pixel representation
     * contain the red, green and blue color samples and the alpha sample,
     * if present.  If <code>amask</code> is 0, pixel values do not contain
     * alpha information and all pixels are treated as opaque, which means
     * that alpha&nbsp;=&nbsp;1.0.  All of the bits in each mask must
     * be contiguous and fit in the specified number of least significant bits
     * of an <code>int</code> pixel representation.  Alpha, if present, is not
     * premultiplied.  The <code>ColorSpace</code> is the default sRGB space.
     * The transparency value is Transparency.OPAQUE if no alpha is
     * present, or Transparency.TRANSLUCENT otherwise.  The transfer type
     * is the smallest of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT,
     * or DataBuffer.TYPE_INT that can hold a single pixel.
     * @param bits the number of bits in the pixel values; for example,
     *         the sum of the number of bits in the masks.
     * @param rmask specifies a mask indicating which bits in an
     *         integer pixel contain the red component
     * @param gmask specifies a mask indicating which bits in an
     *         integer pixel contain the green component
     * @param bmask specifies a mask indicating which bits in an
     *         integer pixel contain the blue component
     * @param amask specifies a mask indicating which bits in an
     *         integer pixel contain the alpha component
     */
    public DirectColorModel(int bits, int rmask, int gmask,
                            int bmask, int amask) {
        super (ColorSpace.getInstance(ColorSpace.CS_sRGB),
               bits, rmask, gmask, bmask, amask, false,
               amask == 0 ? Transparency.OPAQUE : Transparency.TRANSLUCENT,
               ColorModel.getDefaultTransferType(bits));
        setFields();
    }

    
Constructs a DirectColorModel from the specified
parameters.  Color components are in the specified
ColorSpace, which must be of type ColorSpace.TYPE_RGB
and have minimum normalized component values which are all 0.0
and maximum values which are all 1.0.
The masks specify which bits in an int pixel
representation contain the red, green and blue color samples and
the alpha sample, if present.  If amask is 0, pixel
values do not contain alpha information and all pixels are treated
as opaque, which means that alpha = 1.0.  All of the
bits in each mask must be contiguous and fit in the specified number
of least significant bits of an int pixel
representation.  If there is alpha, the boolean
isAlphaPremultiplied specifies how to interpret
color and alpha samples in pixel values.  If the boolean
is true, color samples are assumed to have been
multiplied by the alpha sample.  The transparency value is
Transparency.OPAQUE, if no alpha is present, or
Transparency.TRANSLUCENT otherwise.  The transfer type
is the type of primitive array used to represent pixel values and
must be one of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT, or
DataBuffer.TYPE_INT.
Params:
space – the specified ColorSpace
bits – the number of bits in the pixel values; for example,
        the sum of the number of bits in the masks.
rmask – specifies a mask indicating which bits in an
        integer pixel contain the red component
gmask – specifies a mask indicating which bits in an
        integer pixel contain the green component
bmask – specifies a mask indicating which bits in an
        integer pixel contain the blue component
amask – specifies a mask indicating which bits in an
        integer pixel contain the alpha component
isAlphaPremultiplied – true if color samples are
       premultiplied by the alpha sample; false otherwise
transferType – the type of array used to represent pixel values
Throws:
IllegalArgumentException – if space is not a
        TYPE_RGB space or if the min/max normalized component
        values are not 0.0/1.0./**
     * Constructs a <code>DirectColorModel</code> from the specified
     * parameters.  Color components are in the specified
     * <code>ColorSpace</code>, which must be of type ColorSpace.TYPE_RGB
     * and have minimum normalized component values which are all 0.0
     * and maximum values which are all 1.0.
     * The masks specify which bits in an <code>int</code> pixel
     * representation contain the red, green and blue color samples and
     * the alpha sample, if present.  If <code>amask</code> is 0, pixel
     * values do not contain alpha information and all pixels are treated
     * as opaque, which means that alpha&nbsp;=&nbsp;1.0.  All of the
     * bits in each mask must be contiguous and fit in the specified number
     * of least significant bits of an <code>int</code> pixel
     * representation.  If there is alpha, the <code>boolean</code>
     * <code>isAlphaPremultiplied</code> specifies how to interpret
     * color and alpha samples in pixel values.  If the <code>boolean</code>
     * is <code>true</code>, color samples are assumed to have been
     * multiplied by the alpha sample.  The transparency value is
     * Transparency.OPAQUE, if no alpha is present, or
     * Transparency.TRANSLUCENT otherwise.  The transfer type
     * is the type of primitive array used to represent pixel values and
     * must be one of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT, or
     * DataBuffer.TYPE_INT.
     * @param space the specified <code>ColorSpace</code>
     * @param bits the number of bits in the pixel values; for example,
     *         the sum of the number of bits in the masks.
     * @param rmask specifies a mask indicating which bits in an
     *         integer pixel contain the red component
     * @param gmask specifies a mask indicating which bits in an
     *         integer pixel contain the green component
     * @param bmask specifies a mask indicating which bits in an
     *         integer pixel contain the blue component
     * @param amask specifies a mask indicating which bits in an
     *         integer pixel contain the alpha component
     * @param isAlphaPremultiplied <code>true</code> if color samples are
     *        premultiplied by the alpha sample; <code>false</code> otherwise
     * @param transferType the type of array used to represent pixel values
     * @throws IllegalArgumentException if <code>space</code> is not a
     *         TYPE_RGB space or if the min/max normalized component
     *         values are not 0.0/1.0.
     */
    public DirectColorModel(ColorSpace space, int bits, int rmask,
                            int gmask, int bmask, int amask,
                            boolean isAlphaPremultiplied,
                            int transferType) {
        super (space, bits, rmask, gmask, bmask, amask,
               isAlphaPremultiplied,
               amask == 0 ? Transparency.OPAQUE : Transparency.TRANSLUCENT,
               transferType);
        if (ColorModel.isLinearRGBspace(colorSpace)) {
            is_LinearRGB = true;
            if (maxBits <= 8) {
                lRGBprecision = 8;
                tosRGB8LUT = ColorModel.getLinearRGB8TosRGB8LUT();
                fromsRGB8LUT8 = ColorModel.getsRGB8ToLinearRGB8LUT();
            } else {
                lRGBprecision = 16;
                tosRGB8LUT = ColorModel.getLinearRGB16TosRGB8LUT();
                fromsRGB8LUT16 = ColorModel.getsRGB8ToLinearRGB16LUT();
            }
        } else if (!is_sRGB) {
            for (int i = 0; i < 3; i++) {
                // super constructor checks that space is TYPE_RGB
                // check here that min/max are all 0.0/1.0
                if ((space.getMinValue(i) != 0.0f) ||
                    (space.getMaxValue(i) != 1.0f)) {
                    throw new IllegalArgumentException(
                        "Illegal min/max RGB component value");
                }
            }
        }
        setFields();
    }

    
Returns the mask indicating which bits in an int pixel
representation contain the red color component.
Returns:
the mask, which indicates which bits of the int
        pixel representation contain the red color sample./**
     * Returns the mask indicating which bits in an <code>int</code> pixel
     * representation contain the red color component.
     * @return the mask, which indicates which bits of the <code>int</code>
     *         pixel representation contain the red color sample.
     */
    final public int getRedMask() {
        return maskArray[0];
    }

    
Returns the mask indicating which bits in an int pixel
representation contain the green color component.
Returns:
the mask, which indicates which bits of the int
        pixel representation contain the green color sample./**
     * Returns the mask indicating which bits in an <code>int</code> pixel
     * representation contain the green color component.
     * @return the mask, which indicates which bits of the <code>int</code>
     *         pixel representation contain the green color sample.
     */
    final public int getGreenMask() {
        return maskArray[1];
    }

    
Returns the mask indicating which bits in an int pixel
representation contain the blue color component.
Returns:
the mask, which indicates which bits of the int
        pixel representation contain the blue color sample./**
     * Returns the mask indicating which bits in an <code>int</code> pixel
     * representation contain the blue color component.
     * @return the mask, which indicates which bits of the <code>int</code>
     *         pixel representation contain the blue color sample.
     */
    final public int getBlueMask() {
        return maskArray[2];
    }

    
Returns the mask indicating which bits in an int pixel
representation contain the alpha component.
Returns:
the mask, which indicates which bits of the int
        pixel representation contain the alpha sample./**
     * Returns the mask indicating which bits in an <code>int</code> pixel
     * representation contain the alpha component.
     * @return the mask, which indicates which bits of the <code>int</code>
     *         pixel representation contain the alpha sample.
     */
    final public int getAlphaMask() {
        if (supportsAlpha) {
            return maskArray[3];
        } else {
            return 0;
        }
    }


    /*
     * Given an int pixel in this ColorModel's ColorSpace, converts
     * it to the default sRGB ColorSpace and returns the R, G, and B
     * components as float values between 0.0 and 1.0.
     */
    private float[] getDefaultRGBComponents(int pixel) {
        int components[] = getComponents(pixel, null, 0);
        float norm[] = getNormalizedComponents(components, 0, null, 0);
        // Note that getNormalizedComponents returns non-premultiplied values
        return colorSpace.toRGB(norm);
    }


    private int getsRGBComponentFromsRGB(int pixel, int idx) {
        int c = ((pixel & maskArray[idx]) >>> maskOffsets[idx]);
        if (isAlphaPremultiplied) {
            int a = ((pixel & maskArray[3]) >>> maskOffsets[3]);
            c = (a == 0) ? 0 :
                         (int) (((c * scaleFactors[idx]) * 255.0f /
                                 (a * scaleFactors[3])) + 0.5f);
        } else if (scaleFactors[idx] != 1.0f) {
            c = (int) ((c * scaleFactors[idx]) + 0.5f);
        }
        return c;
    }


    private int getsRGBComponentFromLinearRGB(int pixel, int idx) {
        int c = ((pixel & maskArray[idx]) >>> maskOffsets[idx]);
        if (isAlphaPremultiplied) {
            float factor = (float) ((1 << lRGBprecision) - 1);
            int a = ((pixel & maskArray[3]) >>> maskOffsets[3]);
            c = (a == 0) ? 0 :
                         (int) (((c * scaleFactors[idx]) * factor /
                                 (a * scaleFactors[3])) + 0.5f);
        } else if (nBits[idx] != lRGBprecision) {
            if (lRGBprecision == 16) {
                c = (int) ((c * scaleFactors[idx] * 257.0f) + 0.5f);
            } else {
                c = (int) ((c * scaleFactors[idx]) + 0.5f);
            }
        }
        // now range of c is 0-255 or 0-65535, depending on lRGBprecision
        return tosRGB8LUT[c] & 0xff;
    }


    
Returns the red color component for the specified pixel, scaled
from 0 to 255 in the default RGB ColorSpace, sRGB.  A
color conversion is done if necessary.  The pixel value is specified
as an int.
The returned value is a non pre-multiplied value.  Thus, if the
alpha is premultiplied, this method divides it out before returning
the value.  If the alpha value is 0, for example, the red value
is 0.
Params:
pixel – the specified pixel
Returns:
the red color component for the specified pixel, from
        0 to 255 in the sRGB ColorSpace./**
     * Returns the red color component for the specified pixel, scaled
     * from 0 to 255 in the default RGB <code>ColorSpace</code>, sRGB.  A
     * color conversion is done if necessary.  The pixel value is specified
     * as an <code>int</code>.
     * The returned value is a non pre-multiplied value.  Thus, if the
     * alpha is premultiplied, this method divides it out before returning
     * the value.  If the alpha value is 0, for example, the red value
     * is 0.
     * @param pixel the specified pixel
     * @return the red color component for the specified pixel, from
     *         0 to 255 in the sRGB <code>ColorSpace</code>.
     */
    final public int getRed(int pixel) {
        if (is_sRGB) {
            return getsRGBComponentFromsRGB(pixel, 0);
        } else if (is_LinearRGB) {
            return getsRGBComponentFromLinearRGB(pixel, 0);
        }
        float rgb[] = getDefaultRGBComponents(pixel);
        return (int) (rgb[0] * 255.0f + 0.5f);
    }

    
Returns the green color component for the specified pixel, scaled
from 0 to 255 in the default RGB ColorSpace, sRGB.  A
color conversion is done if necessary.  The pixel value is specified
as an int.
The returned value is a non pre-multiplied value.  Thus, if the
alpha is premultiplied, this method divides it out before returning
the value.  If the alpha value is 0, for example, the green value
is 0.
Params:
pixel – the specified pixel
Returns:
the green color component for the specified pixel, from
        0 to 255 in the sRGB ColorSpace./**
     * Returns the green color component for the specified pixel, scaled
     * from 0 to 255 in the default RGB <code>ColorSpace</code>, sRGB.  A
     * color conversion is done if necessary.  The pixel value is specified
     * as an <code>int</code>.
     * The returned value is a non pre-multiplied value.  Thus, if the
     * alpha is premultiplied, this method divides it out before returning
     * the value.  If the alpha value is 0, for example, the green value
     * is 0.
     * @param pixel the specified pixel
     * @return the green color component for the specified pixel, from
     *         0 to 255 in the sRGB <code>ColorSpace</code>.
     */
    final public int getGreen(int pixel) {
        if (is_sRGB) {
            return getsRGBComponentFromsRGB(pixel, 1);
        } else if (is_LinearRGB) {
            return getsRGBComponentFromLinearRGB(pixel, 1);
        }
        float rgb[] = getDefaultRGBComponents(pixel);
        return (int) (rgb[1] * 255.0f + 0.5f);
    }

    
Returns the blue color component for the specified pixel, scaled
from 0 to 255 in the default RGB ColorSpace, sRGB.  A
color conversion is done if necessary.  The pixel value is specified
as an int.
The returned value is a non pre-multiplied value.  Thus, if the
alpha is premultiplied, this method divides it out before returning
the value.  If the alpha value is 0, for example, the blue value
is 0.
Params:
pixel – the specified pixel
Returns:
the blue color component for the specified pixel, from
        0 to 255 in the sRGB ColorSpace./**
     * Returns the blue color component for the specified pixel, scaled
     * from 0 to 255 in the default RGB <code>ColorSpace</code>, sRGB.  A
     * color conversion is done if necessary.  The pixel value is specified
     * as an <code>int</code>.
     * The returned value is a non pre-multiplied value.  Thus, if the
     * alpha is premultiplied, this method divides it out before returning
     * the value.  If the alpha value is 0, for example, the blue value
     * is 0.
     * @param pixel the specified pixel
     * @return the blue color component for the specified pixel, from
     *         0 to 255 in the sRGB <code>ColorSpace</code>.
     */
    final public int getBlue(int pixel) {
        if (is_sRGB) {
            return getsRGBComponentFromsRGB(pixel, 2);
        } else if (is_LinearRGB) {
            return getsRGBComponentFromLinearRGB(pixel, 2);
        }
        float rgb[] = getDefaultRGBComponents(pixel);
        return (int) (rgb[2] * 255.0f + 0.5f);
    }

    
Returns the alpha component for the specified pixel, scaled
from 0 to 255.  The pixel value is specified as an int.
Params:
pixel – the specified pixel
Returns:
the value of the alpha component of pixel
        from 0 to 255./**
     * Returns the alpha component for the specified pixel, scaled
     * from 0 to 255.  The pixel value is specified as an <code>int</code>.
     * @param pixel the specified pixel
     * @return the value of the alpha component of <code>pixel</code>
     *         from 0 to 255.
     */
    final public int getAlpha(int pixel) {
        if (!supportsAlpha) return 255;
        int a = ((pixel & maskArray[3]) >>> maskOffsets[3]);
        if (scaleFactors[3] != 1.0f) {
            a = (int)(a * scaleFactors[3] + 0.5f);
        }
        return a;
    }

    
Returns the color/alpha components of the pixel in the default
RGB color model format.  A color conversion is done if necessary.
The pixel value is specified as an int.
The returned value is in a non pre-multiplied format.  Thus, if
the alpha is premultiplied, this method divides it out of the
color components.  If the alpha value is 0, for example, the color
values are each 0.
Params:
pixel – the specified pixel
See Also:
ColorModel.getRGBdefault
Returns:
the RGB value of the color/alpha components of the specified
        pixel./**
     * Returns the color/alpha components of the pixel in the default
     * RGB color model format.  A color conversion is done if necessary.
     * The pixel value is specified as an <code>int</code>.
     * The returned value is in a non pre-multiplied format.  Thus, if
     * the alpha is premultiplied, this method divides it out of the
     * color components.  If the alpha value is 0, for example, the color
     * values are each 0.
     * @param pixel the specified pixel
     * @return the RGB value of the color/alpha components of the specified
     *         pixel.
     * @see ColorModel#getRGBdefault
     */
    final public int getRGB(int pixel) {
        if (is_sRGB || is_LinearRGB) {
            return (getAlpha(pixel) << 24)
                | (getRed(pixel) << 16)
                | (getGreen(pixel) << 8)
                | (getBlue(pixel) << 0);
        }
        float rgb[] = getDefaultRGBComponents(pixel);
        return (getAlpha(pixel) << 24)
            | (((int) (rgb[0] * 255.0f + 0.5f)) << 16)
            | (((int) (rgb[1] * 255.0f + 0.5f)) << 8)
            | (((int) (rgb[2] * 255.0f + 0.5f)) << 0);
    }

    
Returns the red color component for the specified pixel, scaled
from 0 to 255 in the default RGB ColorSpace, sRGB.  A
color conversion is done if necessary.  The pixel value is specified
by an array of data elements of type transferType passed
in as an object reference.
The returned value is a non pre-multiplied value.  Thus, if the
alpha is premultiplied, this method divides it out before returning
the value.  If the alpha value is 0, for example, the red value
is 0.
If inData is not a primitive array of type
transferType, a ClassCastException is
thrown.  An ArrayIndexOutOfBoundsException is
thrown if inData is not large enough to hold a
pixel value for this ColorModel.  Since
DirectColorModel can be subclassed, subclasses inherit
the implementation of this method and if they don't override it
then they throw an exception if they use an unsupported
transferType.
An UnsupportedOperationException is thrown if this
transferType is not supported by this
ColorModel.
Params:
inData – the array containing the pixel value
Throws:
ArrayIndexOutOfBoundsException – if inData is not
        large enough to hold a pixel value for this color model
ClassCastException – if inData is not a
        primitive array of type transferType
UnsupportedOperationException – if this transferType
        is not supported by this color model
Returns:
the value of the red component of the specified pixel./**
     * Returns the red color component for the specified pixel, scaled
     * from 0 to 255 in the default RGB <code>ColorSpace</code>, sRGB.  A
     * color conversion is done if necessary.  The pixel value is specified
     * by an array of data elements of type <code>transferType</code> passed
     * in as an object reference.
     * The returned value is a non pre-multiplied value.  Thus, if the
     * alpha is premultiplied, this method divides it out before returning
     * the value.  If the alpha value is 0, for example, the red value
     * is 0.
     * If <code>inData</code> is not a primitive array of type
     * <code>transferType</code>, a <code>ClassCastException</code> is
     * thrown.  An <code>ArrayIndexOutOfBoundsException</code> is
     * thrown if <code>inData</code> is not large enough to hold a
     * pixel value for this <code>ColorModel</code>.  Since
     * <code>DirectColorModel</code> can be subclassed, subclasses inherit
     * the implementation of this method and if they don't override it
     * then they throw an exception if they use an unsupported
     * <code>transferType</code>.
     * An <code>UnsupportedOperationException</code> is thrown if this
     * <code>transferType</code> is not supported by this
     * <code>ColorModel</code>.
     * @param inData the array containing the pixel value
     * @return the value of the red component of the specified pixel.
     * @throws ArrayIndexOutOfBoundsException if <code>inData</code> is not
     *         large enough to hold a pixel value for this color model
     * @throws ClassCastException if <code>inData</code> is not a
     *         primitive array of type <code>transferType</code>
     * @throws UnsupportedOperationException if this <code>transferType</code>
     *         is not supported by this color model
     */
    public int getRed(Object inData) {
        int pixel=0;
        switch (transferType) {
            case DataBuffer.TYPE_BYTE:
               byte bdata[] = (byte[])inData;
               pixel = bdata[0] & 0xff;
            break;
            case DataBuffer.TYPE_USHORT:
               short sdata[] = (short[])inData;
               pixel = sdata[0] & 0xffff;
            break;
            case DataBuffer.TYPE_INT:
               int idata[] = (int[])inData;
               pixel = idata[0];
            break;
            default:
               throw new UnsupportedOperationException("This method has not been "+
                   "implemented for transferType " + transferType);
        }
        return getRed(pixel);
    }


    
Returns the green color component for the specified pixel, scaled
from 0 to 255 in the default RGB ColorSpace, sRGB.  A
color conversion is done if necessary.  The pixel value is specified
by an array of data elements of type transferType passed
in as an object reference.
The returned value is a non pre-multiplied value.  Thus, if the
alpha is premultiplied, this method divides it out before returning
the value.  If the alpha value is 0, for example, the green value
is 0.  If inData is not a primitive array of type
transferType, a ClassCastException is thrown.
 An ArrayIndexOutOfBoundsException is
thrown if inData is not large enough to hold a pixel
value for this ColorModel.  Since
DirectColorModel can be subclassed, subclasses inherit
the implementation of this method and if they don't override it
then they throw an exception if they use an unsupported
transferType.
An UnsupportedOperationException is
thrown if this transferType is not supported by this
ColorModel.
Params:
inData – the array containing the pixel value
Throws:
ArrayIndexOutOfBoundsException – if inData is not
        large enough to hold a pixel value for this color model
ClassCastException – if inData is not a
        primitive array of type transferType
UnsupportedOperationException – if this transferType
        is not supported by this color model
Returns:
the value of the green component of the specified pixel./**
     * Returns the green color component for the specified pixel, scaled
     * from 0 to 255 in the default RGB <code>ColorSpace</code>, sRGB.  A
     * color conversion is done if necessary.  The pixel value is specified
     * by an array of data elements of type <code>transferType</code> passed
     * in as an object reference.
     * The returned value is a non pre-multiplied value.  Thus, if the
     * alpha is premultiplied, this method divides it out before returning
     * the value.  If the alpha value is 0, for example, the green value
     * is 0.  If <code>inData</code> is not a primitive array of type
     * <code>transferType</code>, a <code>ClassCastException</code> is thrown.
     *  An <code>ArrayIndexOutOfBoundsException</code> is
     * thrown if <code>inData</code> is not large enough to hold a pixel
     * value for this <code>ColorModel</code>.  Since
     * <code>DirectColorModel</code> can be subclassed, subclasses inherit
     * the implementation of this method and if they don't override it
     * then they throw an exception if they use an unsupported
     * <code>transferType</code>.
     * An <code>UnsupportedOperationException</code> is
     * thrown if this <code>transferType</code> is not supported by this
     * <code>ColorModel</code>.
     * @param inData the array containing the pixel value
     * @return the value of the green component of the specified pixel.
     * @throws ArrayIndexOutOfBoundsException if <code>inData</code> is not
     *         large enough to hold a pixel value for this color model
     * @throws ClassCastException if <code>inData</code> is not a
     *         primitive array of type <code>transferType</code>
     * @throws UnsupportedOperationException if this <code>transferType</code>
     *         is not supported by this color model
     */
    public int getGreen(Object inData) {
        int pixel=0;
        switch (transferType) {
            case DataBuffer.TYPE_BYTE:
               byte bdata[] = (byte[])inData;
               pixel = bdata[0] & 0xff;
            break;
            case DataBuffer.TYPE_USHORT:
               short sdata[] = (short[])inData;
               pixel = sdata[0] & 0xffff;
            break;
            case DataBuffer.TYPE_INT:
               int idata[] = (int[])inData;
               pixel = idata[0];
            break;
            default:
               throw new UnsupportedOperationException("This method has not been "+
                   "implemented for transferType " + transferType);
        }
        return getGreen(pixel);
    }


    
Returns the blue color component for the specified pixel, scaled
from 0 to 255 in the default RGB ColorSpace, sRGB.  A
color conversion is done if necessary.  The pixel value is specified
by an array of data elements of type transferType passed
in as an object reference.
The returned value is a non pre-multiplied value.  Thus, if the
alpha is premultiplied, this method divides it out before returning
the value.  If the alpha value is 0, for example, the blue value
is 0.  If inData is not a primitive array of type
transferType, a ClassCastException is thrown.
 An ArrayIndexOutOfBoundsException is
thrown if inData is not large enough to hold a pixel
value for this ColorModel.  Since
DirectColorModel can be subclassed, subclasses inherit
the implementation of this method and if they don't override it
then they throw an exception if they use an unsupported
transferType.
An UnsupportedOperationException is
thrown if this transferType is not supported by this
ColorModel.
Params:
inData – the array containing the pixel value
Throws:
ArrayIndexOutOfBoundsException – if inData is not
        large enough to hold a pixel value for this color model
ClassCastException – if inData is not a
        primitive array of type transferType
UnsupportedOperationException – if this transferType
        is not supported by this color model
Returns:
the value of the blue component of the specified pixel./**
     * Returns the blue color component for the specified pixel, scaled
     * from 0 to 255 in the default RGB <code>ColorSpace</code>, sRGB.  A
     * color conversion is done if necessary.  The pixel value is specified
     * by an array of data elements of type <code>transferType</code> passed
     * in as an object reference.
     * The returned value is a non pre-multiplied value.  Thus, if the
     * alpha is premultiplied, this method divides it out before returning
     * the value.  If the alpha value is 0, for example, the blue value
     * is 0.  If <code>inData</code> is not a primitive array of type
     * <code>transferType</code>, a <code>ClassCastException</code> is thrown.
     *  An <code>ArrayIndexOutOfBoundsException</code> is
     * thrown if <code>inData</code> is not large enough to hold a pixel
     * value for this <code>ColorModel</code>.  Since
     * <code>DirectColorModel</code> can be subclassed, subclasses inherit
     * the implementation of this method and if they don't override it
     * then they throw an exception if they use an unsupported
     * <code>transferType</code>.
     * An <code>UnsupportedOperationException</code> is
     * thrown if this <code>transferType</code> is not supported by this
     * <code>ColorModel</code>.
     * @param inData the array containing the pixel value
     * @return the value of the blue component of the specified pixel.
     * @throws ArrayIndexOutOfBoundsException if <code>inData</code> is not
     *         large enough to hold a pixel value for this color model
     * @throws ClassCastException if <code>inData</code> is not a
     *         primitive array of type <code>transferType</code>
     * @throws UnsupportedOperationException if this <code>transferType</code>
     *         is not supported by this color model
     */
    public int getBlue(Object inData) {
        int pixel=0;
        switch (transferType) {
            case DataBuffer.TYPE_BYTE:
               byte bdata[] = (byte[])inData;
               pixel = bdata[0] & 0xff;
            break;
            case DataBuffer.TYPE_USHORT:
               short sdata[] = (short[])inData;
               pixel = sdata[0] & 0xffff;
            break;
            case DataBuffer.TYPE_INT:
               int idata[] = (int[])inData;
               pixel = idata[0];
            break;
            default:
               throw new UnsupportedOperationException("This method has not been "+
                   "implemented for transferType " + transferType);
        }
        return getBlue(pixel);
    }

    
Returns the alpha component for the specified pixel, scaled
from 0 to 255.  The pixel value is specified by an array of data
elements of type transferType passed in as an object
reference.
If inData is not a primitive array of type
transferType, a ClassCastException is
thrown.  An ArrayIndexOutOfBoundsException is
thrown if inData is not large enough to hold a pixel
value for this ColorModel.  Since
DirectColorModel can be subclassed, subclasses inherit
the implementation of this method and if they don't override it
then they throw an exception if they use an unsupported
transferType.
If this transferType is not supported, an
UnsupportedOperationException is thrown.
Params:
inData – the specified pixel
Throws:
ClassCastException – if inData
 is not a primitive array of type transferType
ArrayIndexOutOfBoundsException – if
 inData is not large enough to hold a pixel value
 for this ColorModel
UnsupportedOperationException – if this
 tranferType is not supported by this
 ColorModel
Returns:
the alpha component of the specified pixel, scaled from
        0 to 255./**
     * Returns the alpha component for the specified pixel, scaled
     * from 0 to 255.  The pixel value is specified by an array of data
     * elements of type <code>transferType</code> passed in as an object
     * reference.
     * If <code>inData</code> is not a primitive array of type
     * <code>transferType</code>, a <code>ClassCastException</code> is
     * thrown.  An <code>ArrayIndexOutOfBoundsException</code> is
     * thrown if <code>inData</code> is not large enough to hold a pixel
     * value for this <code>ColorModel</code>.  Since
     * <code>DirectColorModel</code> can be subclassed, subclasses inherit
     * the implementation of this method and if they don't override it
     * then they throw an exception if they use an unsupported
     * <code>transferType</code>.
     * If this <code>transferType</code> is not supported, an
     * <code>UnsupportedOperationException</code> is thrown.
     * @param inData the specified pixel
     * @return the alpha component of the specified pixel, scaled from
     *         0 to 255.
     * @exception ClassCastException if <code>inData</code>
     *  is not a primitive array of type <code>transferType</code>
     * @exception ArrayIndexOutOfBoundsException if
     *  <code>inData</code> is not large enough to hold a pixel value
     *  for this <code>ColorModel</code>
     * @exception UnsupportedOperationException if this
     *  <code>tranferType</code> is not supported by this
     *  <code>ColorModel</code>
     */
    public int getAlpha(Object inData) {
        int pixel=0;
        switch (transferType) {
            case DataBuffer.TYPE_BYTE:
               byte bdata[] = (byte[])inData;
               pixel = bdata[0] & 0xff;
            break;
            case DataBuffer.TYPE_USHORT:
               short sdata[] = (short[])inData;
               pixel = sdata[0] & 0xffff;
            break;
            case DataBuffer.TYPE_INT:
               int idata[] = (int[])inData;
               pixel = idata[0];
            break;
            default:
               throw new UnsupportedOperationException("This method has not been "+
                   "implemented for transferType " + transferType);
        }
        return getAlpha(pixel);
    }

    
Returns the color/alpha components for the specified pixel in the
default RGB color model format.  A color conversion is done if
necessary.  The pixel value is specified by an array of data
elements of type transferType passed in as an object
reference.  If inData is not a primitive array of type
transferType, a ClassCastException is
thrown.  An ArrayIndexOutOfBoundsException is
thrown if inData is not large enough to hold a pixel
value for this ColorModel.
The returned value is in a non pre-multiplied format.  Thus, if
the alpha is premultiplied, this method divides it out of the
color components.  If the alpha value is 0, for example, the color
values is 0.  Since DirectColorModel can be
subclassed, subclasses inherit the implementation of this method
and if they don't override it then
they throw an exception if they use an unsupported
transferType.
Params:
inData – the specified pixel
Throws:
UnsupportedOperationException – if this
           transferType is not supported by this
           ColorModel
See Also:
ColorModel.getRGBdefault
Returns:
the color and alpha components of the specified pixel./**
     * Returns the color/alpha components for the specified pixel in the
     * default RGB color model format.  A color conversion is done if
     * necessary.  The pixel value is specified by an array of data
     * elements of type <code>transferType</code> passed in as an object
     * reference.  If <code>inData</code> is not a primitive array of type
     * <code>transferType</code>, a <code>ClassCastException</code> is
     * thrown.  An <code>ArrayIndexOutOfBoundsException</code> is
     * thrown if <code>inData</code> is not large enough to hold a pixel
     * value for this <code>ColorModel</code>.
     * The returned value is in a non pre-multiplied format.  Thus, if
     * the alpha is premultiplied, this method divides it out of the
     * color components.  If the alpha value is 0, for example, the color
     * values is 0.  Since <code>DirectColorModel</code> can be
     * subclassed, subclasses inherit the implementation of this method
     * and if they don't override it then
     * they throw an exception if they use an unsupported
     * <code>transferType</code>.
     *
     * @param inData the specified pixel
     * @return the color and alpha components of the specified pixel.
     * @exception UnsupportedOperationException if this
     *            <code>transferType</code> is not supported by this
     *            <code>ColorModel</code>
     * @see ColorModel#getRGBdefault
     */
    public int getRGB(Object inData) {
        int pixel=0;
        switch (transferType) {
            case DataBuffer.TYPE_BYTE:
               byte bdata[] = (byte[])inData;
               pixel = bdata[0] & 0xff;
            break;
            case DataBuffer.TYPE_USHORT:
               short sdata[] = (short[])inData;
               pixel = sdata[0] & 0xffff;
            break;
            case DataBuffer.TYPE_INT:
               int idata[] = (int[])inData;
               pixel = idata[0];
            break;
            default:
               throw new UnsupportedOperationException("This method has not been "+
                   "implemented for transferType " + transferType);
        }
        return getRGB(pixel);
    }

    
Returns a data element array representation of a pixel in this
ColorModel, given an integer pixel representation in the
default RGB color model.
This array can then be passed to the setDataElements
method of a WritableRaster object.  If the pixel variable
is null, a new array is allocated.  If pixel
is not null, it must be a primitive array of type
transferType; otherwise, a
ClassCastException is thrown.  An
ArrayIndexOutOfBoundsException is
thrown if pixel is not large enough to hold a pixel
value for this ColorModel.  The pixel array is returned.
Since DirectColorModel can be subclassed, subclasses
inherit the implementation of this method and if they don't
override it then they throw an exception if they use an unsupported
transferType.
Params:
rgb – the integer pixel representation in the default RGB
           color model
pixel – the specified pixel
Throws:
ClassCastException – if pixel
 is not a primitive array of type transferType
ArrayIndexOutOfBoundsException – if
 pixel is not large enough to hold a pixel value
 for this ColorModel
UnsupportedOperationException – if this
 transferType is not supported by this
 ColorModel
See Also:
WritableRaster.setDataElements
SampleModel.setDataElements
Returns:
an array representation of the specified pixel in this
        ColorModel/**
     * Returns a data element array representation of a pixel in this
     * <code>ColorModel</code>, given an integer pixel representation in the
     * default RGB color model.
     * This array can then be passed to the <code>setDataElements</code>
     * method of a <code>WritableRaster</code> object.  If the pixel variable
     * is <code>null</code>, a new array is allocated.  If <code>pixel</code>
     * is not <code>null</code>, it must be a primitive array of type
     * <code>transferType</code>; otherwise, a
     * <code>ClassCastException</code> is thrown.  An
     * <code>ArrayIndexOutOfBoundsException</code> is
     * thrown if <code>pixel</code> is not large enough to hold a pixel
     * value for this <code>ColorModel</code>.  The pixel array is returned.
     * Since <code>DirectColorModel</code> can be subclassed, subclasses
     * inherit the implementation of this method and if they don't
     * override it then they throw an exception if they use an unsupported
     * <code>transferType</code>.
     *
     * @param rgb the integer pixel representation in the default RGB
     *            color model
     * @param pixel the specified pixel
     * @return an array representation of the specified pixel in this
     *         <code>ColorModel</code>
     * @exception ClassCastException if <code>pixel</code>
     *  is not a primitive array of type <code>transferType</code>
     * @exception ArrayIndexOutOfBoundsException if
     *  <code>pixel</code> is not large enough to hold a pixel value
     *  for this <code>ColorModel</code>
     * @exception UnsupportedOperationException if this
     *  <code>transferType</code> is not supported by this
     *  <code>ColorModel</code>
     * @see WritableRaster#setDataElements
     * @see SampleModel#setDataElements
     */
    public Object getDataElements(int rgb, Object pixel) {
        //REMIND: maybe more efficient not to use int array for
        //DataBuffer.TYPE_USHORT and DataBuffer.TYPE_INT
        int intpixel[] = null;
        if (transferType == DataBuffer.TYPE_INT &&
            pixel != null) {
            intpixel = (int[])pixel;
            intpixel[0] = 0;
        } else {
            intpixel = new int[1];
        }

        ColorModel defaultCM = ColorModel.getRGBdefault();
        if (this == defaultCM || equals(defaultCM)) {
            intpixel[0] = rgb;
            return intpixel;
        }

        int red, grn, blu, alp;
        red = (rgb>>16) & 0xff;
        grn = (rgb>>8) & 0xff;
        blu = rgb & 0xff;
        if (is_sRGB || is_LinearRGB) {
            int precision;
            float factor;
            if (is_LinearRGB) {
                if (lRGBprecision == 8) {
                    red = fromsRGB8LUT8[red] & 0xff;
                    grn = fromsRGB8LUT8[grn] & 0xff;
                    blu = fromsRGB8LUT8[blu] & 0xff;
                    precision = 8;
                    factor = 1.0f / 255.0f;
                } else {
                    red = fromsRGB8LUT16[red] & 0xffff;
                    grn = fromsRGB8LUT16[grn] & 0xffff;
                    blu = fromsRGB8LUT16[blu] & 0xffff;
                    precision = 16;
                    factor = 1.0f / 65535.0f;
                }
            } else {
                precision = 8;
                factor = 1.0f / 255.0f;
            }
            if (supportsAlpha) {
                alp = (rgb>>24) & 0xff;
                if (isAlphaPremultiplied) {
                    factor *= (alp * (1.0f / 255.0f));
                    precision = -1;  // force component calculations below
                }
                if (nBits[3] != 8) {
                    alp = (int)
                        ((alp * (1.0f / 255.0f) * ((1<<nBits[3]) - 1)) + 0.5f);
                    if (alp > ((1<<nBits[3]) - 1)) {
                        // fix 4412670 - see comment below
                        alp = (1<<nBits[3]) - 1;
                    }
                }
                intpixel[0] = alp << maskOffsets[3];
            }
            if (nBits[0] != precision) {
                red = (int) ((red * factor * ((1<<nBits[0]) - 1)) + 0.5f);
            }
            if (nBits[1] != precision) {
                grn = (int) ((grn * factor * ((1<<nBits[1]) - 1)) + 0.5f);
            }
            if (nBits[2] != precision) {
                blu = (int) ((blu * factor * ((1<<nBits[2]) - 1)) + 0.5f);
            }
        } else {
            // Need to convert the color
            float[] norm = new float[3];
            float factor = 1.0f / 255.0f;
            norm[0] = red * factor;
            norm[1] = grn * factor;
            norm[2] = blu * factor;
            norm = colorSpace.fromRGB(norm);
            if (supportsAlpha) {
                alp = (rgb>>24) & 0xff;
                if (isAlphaPremultiplied) {
                    factor *= alp;
                    for (int i = 0; i < 3; i++) {
                        norm[i] *= factor;
                    }
                }
                if (nBits[3] != 8) {
                    alp = (int)
                        ((alp * (1.0f / 255.0f) * ((1<<nBits[3]) - 1)) + 0.5f);
                    if (alp > ((1<<nBits[3]) - 1)) {
                        // fix 4412670 - see comment below
                        alp = (1<<nBits[3]) - 1;
                    }
                }
                intpixel[0] = alp << maskOffsets[3];
            }
            red = (int) ((norm[0] * ((1<<nBits[0]) - 1)) + 0.5f);
            grn = (int) ((norm[1] * ((1<<nBits[1]) - 1)) + 0.5f);
            blu = (int) ((norm[2] * ((1<<nBits[2]) - 1)) + 0.5f);
        }

        if (maxBits > 23) {
            // fix 4412670 - for components of 24 or more bits
            // some calculations done above with float precision
            // may lose enough precision that the integer result
            // overflows nBits, so we need to clamp.
            if (red > ((1<<nBits[0]) - 1)) {
                red = (1<<nBits[0]) - 1;
            }
            if (grn > ((1<<nBits[1]) - 1)) {
                grn = (1<<nBits[1]) - 1;
            }
            if (blu > ((1<<nBits[2]) - 1)) {
                blu = (1<<nBits[2]) - 1;
            }
        }

        intpixel[0] |= (red << maskOffsets[0]) |
                       (grn << maskOffsets[1]) |
                       (blu << maskOffsets[2]);

        switch (transferType) {
            case DataBuffer.TYPE_BYTE: {
               byte bdata[];
               if (pixel == null) {
                   bdata = new byte[1];
               } else {
                   bdata = (byte[])pixel;
               }
               bdata[0] = (byte)(0xff&intpixel[0]);
               return bdata;
            }
            case DataBuffer.TYPE_USHORT:{
               short sdata[];
               if (pixel == null) {
                   sdata = new short[1];
               } else {
                   sdata = (short[])pixel;
               }
               sdata[0] = (short)(intpixel[0]&0xffff);
               return sdata;
            }
            case DataBuffer.TYPE_INT:
               return intpixel;
        }
        throw new UnsupportedOperationException("This method has not been "+
                 "implemented for transferType " + transferType);

    }

    
Returns an array of unnormalized color/alpha components given a pixel
in this ColorModel.  The pixel value is specified as an
int.  If the components array is
null, a new array is allocated.  The
components array is returned.  Color/alpha components are
stored in the components array starting at
offset, even if the array is allocated by this method.
An ArrayIndexOutOfBoundsException is thrown if the
components array is not null and is not large
enough to hold all the color and alpha components, starting at
offset.
Params:
pixel – the specified pixel
components – the array to receive the color and alpha
components of the specified pixel
offset – the offset into the components array at
which to start storing the color and alpha components
Returns:
an array containing the color and alpha components of the
specified pixel starting at the specified offset./**
     * Returns an array of unnormalized color/alpha components given a pixel
     * in this <code>ColorModel</code>.  The pixel value is specified as an
     * <code>int</code>.  If the <code>components</code> array is
     * <code>null</code>, a new array is allocated.  The
     * <code>components</code> array is returned.  Color/alpha components are
     * stored in the <code>components</code> array starting at
     * <code>offset</code>, even if the array is allocated by this method.
     * An <code>ArrayIndexOutOfBoundsException</code> is thrown if the
     * <code>components</code> array is not <code>null</code> and is not large
     * enough to hold all the color and alpha components, starting at
     * <code>offset</code>.
     * @param pixel the specified pixel
     * @param components the array to receive the color and alpha
     * components of the specified pixel
     * @param offset the offset into the <code>components</code> array at
     * which to start storing the color and alpha components
     * @return an array containing the color and alpha components of the
     * specified pixel starting at the specified offset.
     */
    final public int[] getComponents(int pixel, int[] components, int offset) {
        if (components == null) {
            components = new int[offset+numComponents];
        }

        for (int i=0; i < numComponents; i++) {
            components[offset+i] = (pixel & maskArray[i]) >>> maskOffsets[i];
        }

        return components;
    }

    
Returns an array of unnormalized color/alpha components given a pixel
in this ColorModel.  The pixel value is specified by an
array of data elements of type transferType passed in as
an object reference.  If pixel is not a primitive array
of type transferType, a ClassCastException
is thrown.  An ArrayIndexOutOfBoundsException is
thrown if pixel is not large enough to hold a
pixel value for this ColorModel.  If the
components array is null, a new
array is allocated.  The components array is returned.
Color/alpha components are stored in the components array
starting at offset, even if the array is allocated by
this method.  An ArrayIndexOutOfBoundsException
is thrown if the components array is not
null and is not large enough to hold all the color and
alpha components, starting at offset.
Since DirectColorModel can be subclassed, subclasses
inherit the implementation of this method and if they don't
override it then they throw an exception if they use an unsupported
transferType.
Params:
pixel – the specified pixel
components – the array to receive the color and alpha
       components of the specified pixel
offset – the offset into the components array at
       which to start storing the color and alpha components
Throws:
ClassCastException – if pixel
 is not a primitive array of type transferType
ArrayIndexOutOfBoundsException – if
 pixel is not large enough to hold a pixel value
 for this ColorModel, or if components
 is not null and is not large enough to hold all the
 color and alpha components, starting at offset
UnsupportedOperationException – if this
           transferType is not supported by this
           color model
Returns:
an array containing the color and alpha components of the
specified pixel starting at the specified offset./**
     * Returns an array of unnormalized color/alpha components given a pixel
     * in this <code>ColorModel</code>.  The pixel value is specified by an
     * array of data elements of type <code>transferType</code> passed in as
     * an object reference.  If <code>pixel</code> is not a primitive array
     * of type <code>transferType</code>, a <code>ClassCastException</code>
     * is thrown.  An <code>ArrayIndexOutOfBoundsException</code> is
     * thrown if <code>pixel</code> is not large enough to hold a
     * pixel value for this <code>ColorModel</code>.  If the
     * <code>components</code> array is <code>null</code>, a new
     * array is allocated.  The <code>components</code> array is returned.
     * Color/alpha components are stored in the <code>components</code> array
     * starting at <code>offset</code>, even if the array is allocated by
     * this method.  An <code>ArrayIndexOutOfBoundsException</code>
     * is thrown if the <code>components</code> array is not
     * <code>null</code> and is not large enough to hold all the color and
     * alpha components, starting at <code>offset</code>.
     * Since <code>DirectColorModel</code> can be subclassed, subclasses
     * inherit the implementation of this method and if they don't
     * override it then they throw an exception if they use an unsupported
     * <code>transferType</code>.
     * @param pixel the specified pixel
     * @param components the array to receive the color and alpha
     *        components of the specified pixel
     * @param offset the offset into the <code>components</code> array at
     *        which to start storing the color and alpha components
     * @return an array containing the color and alpha components of the
     * specified pixel starting at the specified offset.
     * @exception ClassCastException if <code>pixel</code>
     *  is not a primitive array of type <code>transferType</code>
     * @exception ArrayIndexOutOfBoundsException if
     *  <code>pixel</code> is not large enough to hold a pixel value
     *  for this <code>ColorModel</code>, or if <code>components</code>
     *  is not <code>null</code> and is not large enough to hold all the
     *  color and alpha components, starting at <code>offset</code>
     * @exception UnsupportedOperationException if this
     *            <code>transferType</code> is not supported by this
     *            color model
     */
    final public int[] getComponents(Object pixel, int[] components,
                                     int offset) {
        int intpixel=0;
        switch (transferType) {
            case DataBuffer.TYPE_BYTE:
               byte bdata[] = (byte[])pixel;
               intpixel = bdata[0] & 0xff;
            break;
            case DataBuffer.TYPE_USHORT:
               short sdata[] = (short[])pixel;
               intpixel = sdata[0] & 0xffff;
            break;
            case DataBuffer.TYPE_INT:
               int idata[] = (int[])pixel;
               intpixel = idata[0];
            break;
            default:
               throw new UnsupportedOperationException("This method has not been "+
                   "implemented for transferType " + transferType);
        }
        return getComponents(intpixel, components, offset);
    }

    
Creates a WritableRaster with the specified width and
height that has a data layout (SampleModel) compatible
with this ColorModel.
Params:
w – the width to apply to the new WritableRaster
h – the height to apply to the new WritableRaster
Throws:
IllegalArgumentException – if w or h
        is less than or equal to zero
See Also:
WritableRaster
SampleModel
Returns:
a WritableRaster object with the specified
width and height./**
     * Creates a <code>WritableRaster</code> with the specified width and
     * height that has a data layout (<code>SampleModel</code>) compatible
     * with this <code>ColorModel</code>.
     * @param w the width to apply to the new <code>WritableRaster</code>
     * @param h the height to apply to the new <code>WritableRaster</code>
     * @return a <code>WritableRaster</code> object with the specified
     * width and height.
     * @throws IllegalArgumentException if <code>w</code> or <code>h</code>
     *         is less than or equal to zero
     * @see WritableRaster
     * @see SampleModel
     */
    final public WritableRaster createCompatibleWritableRaster (int w,
                                                                int h) {
        if ((w <= 0) || (h <= 0)) {
            throw new IllegalArgumentException("Width (" + w + ") and height (" + h +
                                               ") cannot be <= 0");
        }
        int[] bandmasks;
        if (supportsAlpha) {
            bandmasks = new int[4];
            bandmasks[3] = alpha_mask;
        }
        else {
            bandmasks = new int[3];
        }
        bandmasks[0] = red_mask;
        bandmasks[1] = green_mask;
        bandmasks[2] = blue_mask;

        if (pixel_bits > 16) {
            return Raster.createPackedRaster(DataBuffer.TYPE_INT,
                                             w,h,bandmasks,null);
        }
        else if (pixel_bits > 8) {
            return Raster.createPackedRaster(DataBuffer.TYPE_USHORT,
                                             w,h,bandmasks,null);
        }
        else {
            return Raster.createPackedRaster(DataBuffer.TYPE_BYTE,
                                             w,h,bandmasks,null);
        }
    }

    
Returns a pixel value represented as an int in this
ColorModel, given an array of unnormalized color/alpha
components.   An ArrayIndexOutOfBoundsException is
thrown if the components array is
not large enough to hold all the color and alpha components, starting
at offset.
Params:
components – an array of unnormalized color and alpha
components
offset – the index into components at which to
begin retrieving the color and alpha components
Throws:
ArrayIndexOutOfBoundsException – if
 the components array is not large enough to
 hold all of the color and alpha components starting at
 offset
Returns:
an int pixel value in this
ColorModel corresponding to the specified components./**
     * Returns a pixel value represented as an <code>int</code> in this
     * <code>ColorModel</code>, given an array of unnormalized color/alpha
     * components.   An <code>ArrayIndexOutOfBoundsException</code> is
     * thrown if the <code>components</code> array is
     * not large enough to hold all the color and alpha components, starting
     * at <code>offset</code>.
     * @param components an array of unnormalized color and alpha
     * components
     * @param offset the index into <code>components</code> at which to
     * begin retrieving the color and alpha components
     * @return an <code>int</code> pixel value in this
     * <code>ColorModel</code> corresponding to the specified components.
     * @exception ArrayIndexOutOfBoundsException if
     *  the <code>components</code> array is not large enough to
     *  hold all of the color and alpha components starting at
     *  <code>offset</code>
     */
    public int getDataElement(int[] components, int offset) {
        int pixel = 0;
        for (int i=0; i < numComponents; i++) {
            pixel |= ((components[offset+i]<<maskOffsets[i])&maskArray[i]);
        }
        return pixel;
    }

    
Returns a data element array representation of a pixel in this
ColorModel, given an array of unnormalized color/alpha
components.
This array can then be passed to the setDataElements
method of a WritableRaster object.
An ArrayIndexOutOfBoundsException is thrown if the
components array
is not large enough to hold all the color and alpha components,
starting at offset.  If the obj variable is
null, a new array is allocated.  If obj is
not null, it must be a primitive array
of type transferType; otherwise, a
ClassCastException is thrown.
An ArrayIndexOutOfBoundsException is thrown if
obj is not large enough to hold a pixel value for this
ColorModel.
Since DirectColorModel can be subclassed, subclasses
inherit the implementation of this method and if they don't
override it then they throw an exception if they use an unsupported
transferType.
Params:
components – an array of unnormalized color and alpha
components
offset – the index into components at which to
begin retrieving color and alpha components
obj – the Object representing an array of color
and alpha components
Throws:
ClassCastException – if obj
 is not a primitive array of type transferType
ArrayIndexOutOfBoundsException – if
 obj is not large enough to hold a pixel value
 for this ColorModel or the components
 array is not large enough to hold all of the color and alpha
 components starting at offset
UnsupportedOperationException – if this
           transferType is not supported by this
           color model
See Also:
WritableRaster.setDataElements
SampleModel.setDataElements
Returns:
an Object representing an array of color and
alpha components./**
     * Returns a data element array representation of a pixel in this
     * <code>ColorModel</code>, given an array of unnormalized color/alpha
     * components.
     * This array can then be passed to the <code>setDataElements</code>
     * method of a <code>WritableRaster</code> object.
     * An <code>ArrayIndexOutOfBoundsException</code> is thrown if the
     * <code>components</code> array
     * is not large enough to hold all the color and alpha components,
     * starting at offset.  If the <code>obj</code> variable is
     * <code>null</code>, a new array is allocated.  If <code>obj</code> is
     * not <code>null</code>, it must be a primitive array
     * of type <code>transferType</code>; otherwise, a
     * <code>ClassCastException</code> is thrown.
     * An <code>ArrayIndexOutOfBoundsException</code> is thrown if
     * <code>obj</code> is not large enough to hold a pixel value for this
     * <code>ColorModel</code>.
     * Since <code>DirectColorModel</code> can be subclassed, subclasses
     * inherit the implementation of this method and if they don't
     * override it then they throw an exception if they use an unsupported
     * <code>transferType</code>.
     * @param components an array of unnormalized color and alpha
     * components
     * @param offset the index into <code>components</code> at which to
     * begin retrieving color and alpha components
     * @param obj the <code>Object</code> representing an array of color
     * and alpha components
     * @return an <code>Object</code> representing an array of color and
     * alpha components.
     * @exception ClassCastException if <code>obj</code>
     *  is not a primitive array of type <code>transferType</code>
     * @exception ArrayIndexOutOfBoundsException if
     *  <code>obj</code> is not large enough to hold a pixel value
     *  for this <code>ColorModel</code> or the <code>components</code>
     *  array is not large enough to hold all of the color and alpha
     *  components starting at <code>offset</code>
     * @exception UnsupportedOperationException if this
     *            <code>transferType</code> is not supported by this
     *            color model
     * @see WritableRaster#setDataElements
     * @see SampleModel#setDataElements
     */
    public Object getDataElements(int[] components, int offset, Object obj) {
        int pixel = 0;
        for (int i=0; i < numComponents; i++) {
            pixel |= ((components[offset+i]<<maskOffsets[i])&maskArray[i]);
        }
        switch (transferType) {
            case DataBuffer.TYPE_BYTE:
               if (obj instanceof byte[]) {
                   byte bdata[] = (byte[])obj;
                   bdata[0] = (byte)(pixel&0xff);
                   return bdata;
               } else {
                   byte bdata[] = {(byte)(pixel&0xff)};
                   return bdata;
               }
            case DataBuffer.TYPE_USHORT:
               if (obj instanceof short[]) {
                   short sdata[] = (short[])obj;
                   sdata[0] = (short)(pixel&0xffff);
                   return sdata;
               } else {
                   short sdata[] = {(short)(pixel&0xffff)};
                   return sdata;
               }
            case DataBuffer.TYPE_INT:
               if (obj instanceof int[]) {
                   int idata[] = (int[])obj;
                   idata[0] = pixel;
                   return idata;
               } else {
                   int idata[] = {pixel};
                   return idata;
               }
            default:
               throw new ClassCastException("This method has not been "+
                   "implemented for transferType " + transferType);
        }
    }

    
Forces the raster data to match the state specified in the
isAlphaPremultiplied variable, assuming the data is
currently correctly described by this ColorModel.  It
may multiply or divide the color raster data by alpha, or do
nothing if the data is in the correct state.  If the data needs to
be coerced, this method will also return an instance of this
ColorModel with the isAlphaPremultiplied
flag set appropriately.  This method will throw a
UnsupportedOperationException if this transferType is
not supported by this ColorModel.  Since
ColorModel can be subclassed, subclasses inherit the
implementation of this method and if they don't override it then
they throw an exception if they use an unsupported transferType.
Params:
raster – the WritableRaster data
isAlphaPremultiplied – true if the alpha is
premultiplied; false otherwise
Throws:
UnsupportedOperationException – if this
           transferType is not supported by this
           color model
Returns:
a ColorModel object that represents the
coerced data./**
     * Forces the raster data to match the state specified in the
     * <code>isAlphaPremultiplied</code> variable, assuming the data is
     * currently correctly described by this <code>ColorModel</code>.  It
     * may multiply or divide the color raster data by alpha, or do
     * nothing if the data is in the correct state.  If the data needs to
     * be coerced, this method will also return an instance of this
     * <code>ColorModel</code> with the <code>isAlphaPremultiplied</code>
     * flag set appropriately.  This method will throw a
     * <code>UnsupportedOperationException</code> if this transferType is
     * not supported by this <code>ColorModel</code>.  Since
     * <code>ColorModel</code> can be subclassed, subclasses inherit the
     * implementation of this method and if they don't override it then
     * they throw an exception if they use an unsupported transferType.
     *
     * @param raster the <code>WritableRaster</code> data
     * @param isAlphaPremultiplied <code>true</code> if the alpha is
     * premultiplied; <code>false</code> otherwise
     * @return a <code>ColorModel</code> object that represents the
     * coerced data.
     * @exception UnsupportedOperationException if this
     *            <code>transferType</code> is not supported by this
     *            color model
     */
    final public ColorModel coerceData (WritableRaster raster,
                                        boolean isAlphaPremultiplied)
    {
        if (!supportsAlpha ||
            this.isAlphaPremultiplied() == isAlphaPremultiplied) {
            return this;
        }

        int w = raster.getWidth();
        int h = raster.getHeight();
        int aIdx = numColorComponents;
        float normAlpha;
        float alphaScale = 1.0f / ((float) ((1 << nBits[aIdx]) - 1));

        int rminX = raster.getMinX();
        int rY = raster.getMinY();
        int rX;
        int pixel[] = null;
        int zpixel[] = null;

        if (isAlphaPremultiplied) {
            // Must mean that we are currently not premultiplied so
            // multiply by alpha
            switch (transferType) {
                case DataBuffer.TYPE_BYTE: {
                    for (int y = 0; y < h; y++, rY++) {
                        rX = rminX;
                        for (int x = 0; x < w; x++, rX++) {
                            pixel = raster.getPixel(rX, rY, pixel);
                            normAlpha = pixel[aIdx] * alphaScale;
                            if (normAlpha != 0.f) {
                                for (int c=0; c < aIdx; c++) {
                                    pixel[c] = (int) (pixel[c] * normAlpha +
                                                      0.5f);
                                }
                                raster.setPixel(rX, rY, pixel);
                            } else {
                                if (zpixel == null) {
                                    zpixel = new int[numComponents];
                                    java.util.Arrays.fill(zpixel, 0);
                                }
                                raster.setPixel(rX, rY, zpixel);
                            }
                        }
                    }
                }
                break;
                case DataBuffer.TYPE_USHORT: {
                    for (int y = 0; y < h; y++, rY++) {
                        rX = rminX;
                        for (int x = 0; x < w; x++, rX++) {
                            pixel = raster.getPixel(rX, rY, pixel);
                            normAlpha = pixel[aIdx] * alphaScale;
                            if (normAlpha != 0.f) {
                                for (int c=0; c < aIdx; c++) {
                                    pixel[c] = (int) (pixel[c] * normAlpha +
                                                      0.5f);
                                }
                                raster.setPixel(rX, rY, pixel);
                            } else {
                                if (zpixel == null) {
                                    zpixel = new int[numComponents];
                                    java.util.Arrays.fill(zpixel, 0);
                                }
                                raster.setPixel(rX, rY, zpixel);
                            }
                        }
                    }
                }
                break;
                case DataBuffer.TYPE_INT: {
                    for (int y = 0; y < h; y++, rY++) {
                        rX = rminX;
                        for (int x = 0; x < w; x++, rX++) {
                            pixel = raster.getPixel(rX, rY, pixel);
                            normAlpha = pixel[aIdx] * alphaScale;
                            if (normAlpha != 0.f) {
                                for (int c=0; c < aIdx; c++) {
                                    pixel[c] = (int) (pixel[c] * normAlpha +
                                                      0.5f);
                                }
                                raster.setPixel(rX, rY, pixel);
                            } else {
                                if (zpixel == null) {
                                    zpixel = new int[numComponents];
                                    java.util.Arrays.fill(zpixel, 0);
                                }
                                raster.setPixel(rX, rY, zpixel);
                            }
                        }
                    }
                }
                break;
                default:
                    throw new UnsupportedOperationException("This method has not been "+
                         "implemented for transferType " + transferType);
            }
        }
        else {
            // We are premultiplied and want to divide it out
            switch (transferType) {
                case DataBuffer.TYPE_BYTE: {
                    for (int y = 0; y < h; y++, rY++) {
                        rX = rminX;
                        for (int x = 0; x < w; x++, rX++) {
                            pixel = raster.getPixel(rX, rY, pixel);
                            normAlpha = pixel[aIdx] * alphaScale;
                            if (normAlpha != 0.0f) {
                                float invAlpha = 1.0f / normAlpha;
                                for (int c=0; c < aIdx; c++) {
                                    pixel[c] = (int) (pixel[c] * invAlpha +
                                                      0.5f);
                                }
                                raster.setPixel(rX, rY, pixel);
                            }
                        }
                    }
                }
                break;
                case DataBuffer.TYPE_USHORT: {
                    for (int y = 0; y < h; y++, rY++) {
                        rX = rminX;
                        for (int x = 0; x < w; x++, rX++) {
                            pixel = raster.getPixel(rX, rY, pixel);
                            normAlpha = pixel[aIdx] * alphaScale;
                            if (normAlpha != 0) {
                                float invAlpha = 1.0f / normAlpha;
                                for (int c=0; c < aIdx; c++) {
                                    pixel[c] = (int) (pixel[c] * invAlpha +
                                                      0.5f);
                                }
                                raster.setPixel(rX, rY, pixel);
                            }
                        }
                    }
                }
                break;
                case DataBuffer.TYPE_INT: {
                    for (int y = 0; y < h; y++, rY++) {
                        rX = rminX;
                        for (int x = 0; x < w; x++, rX++) {
                            pixel = raster.getPixel(rX, rY, pixel);
                            normAlpha = pixel[aIdx] * alphaScale;
                            if (normAlpha != 0) {
                                float invAlpha = 1.0f / normAlpha;
                                for (int c=0; c < aIdx; c++) {
                                    pixel[c] = (int) (pixel[c] * invAlpha +
                                                      0.5f);
                                }
                                raster.setPixel(rX, rY, pixel);
                            }
                        }
                    }
                }
                break;
                default:
                    throw new UnsupportedOperationException("This method has not been "+
                         "implemented for transferType " + transferType);
            }
        }

        // Return a new color model
        return new DirectColorModel(colorSpace, pixel_bits, maskArray[0],
                                    maskArray[1], maskArray[2], maskArray[3],
                                    isAlphaPremultiplied,
                                    transferType);

    }

    
Returns true if raster is compatible
with this ColorModel and false if it is
not.
Params:
raster – the Raster object to test for compatibility
Returns:
true if raster is compatible
with this ColorModel; false otherwise./**
      * Returns <code>true</code> if <code>raster</code> is compatible
      * with this <code>ColorModel</code> and <code>false</code> if it is
      * not.
      * @param raster the {@link Raster} object to test for compatibility
      * @return <code>true</code> if <code>raster</code> is compatible
      * with this <code>ColorModel</code>; <code>false</code> otherwise.
      */
    public boolean isCompatibleRaster(Raster raster) {
        SampleModel sm = raster.getSampleModel();
        SinglePixelPackedSampleModel spsm;
        if (sm instanceof SinglePixelPackedSampleModel) {
            spsm = (SinglePixelPackedSampleModel) sm;
        }
        else {
            return false;
        }
        if (spsm.getNumBands() != getNumComponents()) {
            return false;
        }

        int[] bitMasks = spsm.getBitMasks();
        for (int i=0; i<numComponents; i++) {
            if (bitMasks[i] != maskArray[i]) {
                return false;
            }
        }

        return (raster.getTransferType() == transferType);
    }

    private void setFields() {
        // Set the private fields
        // REMIND: Get rid of these from the native code
        red_mask     = maskArray[0];
        red_offset   = maskOffsets[0];
        green_mask   = maskArray[1];
        green_offset = maskOffsets[1];
        blue_mask    = maskArray[2];
        blue_offset  = maskOffsets[2];
        if (nBits[0] < 8) {
            red_scale = (1 << nBits[0]) - 1;
        }
        if (nBits[1] < 8) {
            green_scale = (1 << nBits[1]) - 1;
        }
        if (nBits[2] < 8) {
            blue_scale = (1 << nBits[2]) - 1;
        }
        if (supportsAlpha) {
            alpha_mask   = maskArray[3];
            alpha_offset = maskOffsets[3];
            if (nBits[3] < 8) {
                alpha_scale = (1 << nBits[3]) - 1;
            }
        }
    }

    
Returns a String that represents this
DirectColorModel.
Returns:
a String representing this
DirectColorModel./**
     * Returns a <code>String</code> that represents this
     * <code>DirectColorModel</code>.
     * @return a <code>String</code> representing this
     * <code>DirectColorModel</code>.
     */
    public String toString() {
        return new String("DirectColorModel: rmask="
                          +Integer.toHexString(red_mask)+" gmask="
                          +Integer.toHexString(green_mask)+" bmask="
                          +Integer.toHexString(blue_mask)+" amask="
                          +Integer.toHexString(alpha_mask));
    }
}