- All Implemented Interfaces:
Transparency
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:
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Field Summary
Fields declared in class java.awt.image.ColorModel
pixel_bits, transferTypeFields declared in interface java.awt.Transparency
BITMASK, OPAQUE, TRANSLUCENT -
Constructor Summary
ConstructorsConstructorDescriptionDirectColorModel(int bits, int rmask, int gmask, int bmask) Constructs aDirectColorModelfrom the specified masks that indicate which bits in anintpixel representation contain the red, green and blue color samples.DirectColorModel(int bits, int rmask, int gmask, int bmask, int amask) Constructs aDirectColorModelfrom the specified masks that indicate which bits in anintpixel representation contain the red, green and blue color samples and the alpha sample, if present.DirectColorModel(ColorSpace space, int bits, int rmask, int gmask, int bmask, int amask, boolean isAlphaPremultiplied, int transferType) Constructs aDirectColorModelfrom the specified parameters. -
Method Summary
Modifier and TypeMethodDescriptionfinal ColorModelcoerceData(WritableRaster raster, boolean isAlphaPremultiplied) Forces the raster data to match the state specified in theisAlphaPremultipliedvariable, assuming the data is currently correctly described by thisColorModel.final WritableRastercreateCompatibleWritableRaster(int w, int h) Creates aWritableRasterwith the specified width and height that has a data layout (SampleModel) compatible with thisColorModel.final intgetAlpha(int pixel) Returns the alpha component for the specified pixel, scaled from 0 to 255.intReturns the alpha component for the specified pixel, scaled from 0 to 255.final intReturns the mask indicating which bits in anintpixel representation contain the alpha component.final intgetBlue(int pixel) Returns the blue color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace, sRGB.intReturns the blue color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace, sRGB.final intReturns the mask indicating which bits in anintpixel representation contain the blue color component.final int[]getComponents(int pixel, int[] components, int offset) Returns an array of unnormalized color/alpha components given a pixel in thisColorModel.final int[]getComponents(Object pixel, int[] components, int offset) Returns an array of unnormalized color/alpha components given a pixel in thisColorModel.intgetDataElement(int[] components, int offset) Returns a pixel value represented as anintin thisColorModel, given an array of unnormalized color/alpha components.getDataElements(int[] components, int offset, Object obj) Returns a data element array representation of a pixel in thisColorModel, given an array of unnormalized color/alpha components.getDataElements(int rgb, Object pixel) Returns a data element array representation of a pixel in thisColorModel, given an integer pixel representation in the default RGB color model.final intgetGreen(int pixel) Returns the green color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace, sRGB.intReturns the green color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace, sRGB.final intReturns the mask indicating which bits in anintpixel representation contain the green color component.final intgetRed(int pixel) Returns the red color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace, sRGB.intReturns the red color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace, sRGB.final intReturns the mask indicating which bits in anintpixel representation contain the red color component.final intgetRGB(int pixel) Returns the color/alpha components of the pixel in the default RGB color model format.intReturns the color/alpha components for the specified pixel in the default RGB color model format.booleanisCompatibleRaster(Raster raster) Returnstrueifrasteris compatible with thisColorModelandfalseif it is not.toString()Returns aStringthat represents thisDirectColorModel.Methods declared in class java.awt.image.PackedColorModel
createCompatibleSampleModel, equals, getAlphaRaster, getMask, getMasks, hashCode, isCompatibleSampleModelMethods declared in class java.awt.image.ColorModel
getColorSpace, getComponentSize, getComponentSize, getDataElement, getDataElements, getNormalizedComponents, getNormalizedComponents, getNumColorComponents, getNumComponents, getPixelSize, getRGBdefault, getTransferType, getTransparency, getUnnormalizedComponents, hasAlpha, isAlphaPremultiplied
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Constructor Details
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DirectColorModel
public DirectColorModel(int bits, int rmask, int gmask, int bmask) Constructs aDirectColorModelfrom the specified masks that indicate which bits in anintpixel 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 anintpixel representation. TheColorSpaceis 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.- Parameters:
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 componentgmask- specifies a mask indicating which bits in an integer pixel contain the green componentbmask- specifies a mask indicating which bits in an integer pixel contain the blue component
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DirectColorModel
public DirectColorModel(int bits, int rmask, int gmask, int bmask, int amask) Constructs aDirectColorModelfrom the specified masks that indicate which bits in anintpixel representation contain the red, green and blue color samples and the alpha sample, if present. Ifamaskis 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 anintpixel representation. Alpha, if present, is not premultiplied. TheColorSpaceis 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.- Parameters:
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 componentgmask- specifies a mask indicating which bits in an integer pixel contain the green componentbmask- specifies a mask indicating which bits in an integer pixel contain the blue componentamask- specifies a mask indicating which bits in an integer pixel contain the alpha component
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DirectColorModel
public DirectColorModel(ColorSpace space, int bits, int rmask, int gmask, int bmask, int amask, boolean isAlphaPremultiplied, int transferType) Constructs aDirectColorModelfrom the specified parameters. Color components are in the specifiedColorSpace, 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 anintpixel representation contain the red, green and blue color samples and the alpha sample, if present. Ifamaskis 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 anintpixel representation. If there is alpha, thebooleanisAlphaPremultipliedspecifies how to interpret color and alpha samples in pixel values. If thebooleanistrue, 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.- Parameters:
space- the specifiedColorSpacebits- 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 componentgmask- specifies a mask indicating which bits in an integer pixel contain the green componentbmask- specifies a mask indicating which bits in an integer pixel contain the blue componentamask- specifies a mask indicating which bits in an integer pixel contain the alpha componentisAlphaPremultiplied-trueif color samples are premultiplied by the alpha sample;falseotherwisetransferType- the type of array used to represent pixel values- Throws:
IllegalArgumentException- ifspaceis not a TYPE_RGB space or if the min/max normalized component values are not 0.0/1.0.
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Method Details
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getRedMask
public final int getRedMask()Returns the mask indicating which bits in anintpixel representation contain the red color component.- Returns:
- the mask, which indicates which bits of the
intpixel representation contain the red color sample.
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getGreenMask
public final int getGreenMask()Returns the mask indicating which bits in anintpixel representation contain the green color component.- Returns:
- the mask, which indicates which bits of the
intpixel representation contain the green color sample.
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getBlueMask
public final int getBlueMask()Returns the mask indicating which bits in anintpixel representation contain the blue color component.- Returns:
- the mask, which indicates which bits of the
intpixel representation contain the blue color sample.
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getAlphaMask
public final int getAlphaMask()Returns the mask indicating which bits in anintpixel representation contain the alpha component.- Returns:
- the mask, which indicates which bits of the
intpixel representation contain the alpha sample.
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getRed
public final int getRed(int pixel) Returns the red color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace, sRGB. A color conversion is done if necessary. The pixel value is specified as anint. 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.- Specified by:
getRedin classColorModel- Parameters:
pixel- the specified pixel- Returns:
- the red color component for the specified pixel, from
0 to 255 in the sRGB
ColorSpace.
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getGreen
public final int getGreen(int pixel) Returns the green color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace, sRGB. A color conversion is done if necessary. The pixel value is specified as anint. 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.- Specified by:
getGreenin classColorModel- Parameters:
pixel- the specified pixel- Returns:
- the green color component for the specified pixel, from
0 to 255 in the sRGB
ColorSpace.
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getBlue
public final int getBlue(int pixel) Returns the blue color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace, sRGB. A color conversion is done if necessary. The pixel value is specified as anint. 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.- Specified by:
getBluein classColorModel- Parameters:
pixel- the specified pixel- Returns:
- the blue color component for the specified pixel, from
0 to 255 in the sRGB
ColorSpace.
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getAlpha
public final int getAlpha(int pixel) Returns the alpha component for the specified pixel, scaled from 0 to 255. The pixel value is specified as anint.- Specified by:
getAlphain classColorModel- Parameters:
pixel- the specified pixel- Returns:
- the value of the alpha component of
pixelfrom 0 to 255.
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getRGB
public final int getRGB(int 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 anint. 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.- Overrides:
getRGBin classColorModel- Parameters:
pixel- the specified pixel- Returns:
- the RGB value of the color/alpha components of the specified pixel.
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getRed
Returns the red color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace, sRGB. A color conversion is done if necessary. The pixel value is specified by an array of data elements of typetransferTypepassed 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. IfinDatais not a primitive array of typetransferType, aClassCastExceptionis thrown. AnArrayIndexOutOfBoundsExceptionis thrown ifinDatais not large enough to hold a pixel value for thisColorModel. SinceDirectColorModelcan 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 unsupportedtransferType. AnUnsupportedOperationExceptionis thrown if thistransferTypeis not supported by thisColorModel.- Overrides:
getRedin classColorModel- Parameters:
inData- the array containing the pixel value- Returns:
- the value of the red component of the specified pixel.
- Throws:
ArrayIndexOutOfBoundsException- ifinDatais not large enough to hold a pixel value for this color modelClassCastException- ifinDatais not a primitive array of typetransferTypeUnsupportedOperationException- if thistransferTypeis not supported by this color model
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getGreen
Returns the green color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace, sRGB. A color conversion is done if necessary. The pixel value is specified by an array of data elements of typetransferTypepassed 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. IfinDatais not a primitive array of typetransferType, aClassCastExceptionis thrown. AnArrayIndexOutOfBoundsExceptionis thrown ifinDatais not large enough to hold a pixel value for thisColorModel. SinceDirectColorModelcan 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 unsupportedtransferType. AnUnsupportedOperationExceptionis thrown if thistransferTypeis not supported by thisColorModel.- Overrides:
getGreenin classColorModel- Parameters:
inData- the array containing the pixel value- Returns:
- the value of the green component of the specified pixel.
- Throws:
ArrayIndexOutOfBoundsException- ifinDatais not large enough to hold a pixel value for this color modelClassCastException- ifinDatais not a primitive array of typetransferTypeUnsupportedOperationException- if thistransferTypeis not supported by this color model
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getBlue
Returns the blue color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace, sRGB. A color conversion is done if necessary. The pixel value is specified by an array of data elements of typetransferTypepassed 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. IfinDatais not a primitive array of typetransferType, aClassCastExceptionis thrown. AnArrayIndexOutOfBoundsExceptionis thrown ifinDatais not large enough to hold a pixel value for thisColorModel. SinceDirectColorModelcan 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 unsupportedtransferType. AnUnsupportedOperationExceptionis thrown if thistransferTypeis not supported by thisColorModel.- Overrides:
getBluein classColorModel- Parameters:
inData- the array containing the pixel value- Returns:
- the value of the blue component of the specified pixel.
- Throws:
ArrayIndexOutOfBoundsException- ifinDatais not large enough to hold a pixel value for this color modelClassCastException- ifinDatais not a primitive array of typetransferTypeUnsupportedOperationException- if thistransferTypeis not supported by this color model
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getAlpha
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 typetransferTypepassed in as an object reference. IfinDatais not a primitive array of typetransferType, aClassCastExceptionis thrown. AnArrayIndexOutOfBoundsExceptionis thrown ifinDatais not large enough to hold a pixel value for thisColorModel. SinceDirectColorModelcan 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 unsupportedtransferType. If thistransferTypeis not supported, anUnsupportedOperationExceptionis thrown.- Overrides:
getAlphain classColorModel- Parameters:
inData- the specified pixel- Returns:
- the alpha component of the specified pixel, scaled from 0 to 255.
- Throws:
ClassCastException- ifinDatais not a primitive array of typetransferTypeArrayIndexOutOfBoundsException- ifinDatais not large enough to hold a pixel value for thisColorModelUnsupportedOperationException- if thistranferTypeis not supported by thisColorModel
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getRGB
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 typetransferTypepassed in as an object reference. IfinDatais not a primitive array of typetransferType, aClassCastExceptionis thrown. AnArrayIndexOutOfBoundsExceptionis thrown ifinDatais not large enough to hold a pixel value for thisColorModel. 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. SinceDirectColorModelcan 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 unsupportedtransferType.- Overrides:
getRGBin classColorModel- Parameters:
inData- the specified pixel- Returns:
- the color and alpha components of the specified pixel.
- Throws:
UnsupportedOperationException- if thistransferTypeis not supported by thisColorModel- See Also:
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getDataElements
Returns a data element array representation of a pixel in thisColorModel, given an integer pixel representation in the default RGB color model. This array can then be passed to thesetDataElementsmethod of aWritableRasterobject. If the pixel variable isnull, a new array is allocated. Ifpixelis notnull, it must be a primitive array of typetransferType; otherwise, aClassCastExceptionis thrown. AnArrayIndexOutOfBoundsExceptionis thrown ifpixelis not large enough to hold a pixel value for thisColorModel. The pixel array is returned. SinceDirectColorModelcan 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 unsupportedtransferType.- Overrides:
getDataElementsin classColorModel- Parameters:
rgb- the integer pixel representation in the default RGB color modelpixel- the specified pixel- Returns:
- an array representation of the specified pixel in this
ColorModel - Throws:
ClassCastException- ifpixelis not a primitive array of typetransferTypeArrayIndexOutOfBoundsException- ifpixelis not large enough to hold a pixel value for thisColorModelUnsupportedOperationException- if thistransferTypeis not supported by thisColorModel- See Also:
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getComponents
public final int[] getComponents(int pixel, int[] components, int offset) Returns an array of unnormalized color/alpha components given a pixel in thisColorModel. The pixel value is specified as anint. If thecomponentsarray isnull, a new array is allocated. Thecomponentsarray is returned. Color/alpha components are stored in thecomponentsarray starting atoffset, even if the array is allocated by this method. AnArrayIndexOutOfBoundsExceptionis thrown if thecomponentsarray is notnulland is not large enough to hold all the color and alpha components, starting atoffset.- Overrides:
getComponentsin classColorModel- Parameters:
pixel- the specified pixelcomponents- the array to receive the color and alpha components of the specified pixeloffset- the offset into thecomponentsarray 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.
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getComponents
Returns an array of unnormalized color/alpha components given a pixel in thisColorModel. The pixel value is specified by an array of data elements of typetransferTypepassed in as an object reference. Ifpixelis not a primitive array of typetransferType, aClassCastExceptionis thrown. AnArrayIndexOutOfBoundsExceptionis thrown ifpixelis not large enough to hold a pixel value for thisColorModel. If thecomponentsarray isnull, a new array is allocated. Thecomponentsarray is returned. Color/alpha components are stored in thecomponentsarray starting atoffset, even if the array is allocated by this method. AnArrayIndexOutOfBoundsExceptionis thrown if thecomponentsarray is notnulland is not large enough to hold all the color and alpha components, starting atoffset. SinceDirectColorModelcan 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 unsupportedtransferType.- Overrides:
getComponentsin classColorModel- Parameters:
pixel- the specified pixelcomponents- the array to receive the color and alpha components of the specified pixeloffset- the offset into thecomponentsarray 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.
- Throws:
ClassCastException- ifpixelis not a primitive array of typetransferTypeArrayIndexOutOfBoundsException- ifpixelis not large enough to hold a pixel value for thisColorModel, or ifcomponentsis notnulland is not large enough to hold all the color and alpha components, starting atoffsetUnsupportedOperationException- if thistransferTypeis not supported by this color model
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createCompatibleWritableRaster
Creates aWritableRasterwith the specified width and height that has a data layout (SampleModel) compatible with thisColorModel.- Overrides:
createCompatibleWritableRasterin classColorModel- Parameters:
w- the width to apply to the newWritableRasterh- the height to apply to the newWritableRaster- Returns:
- a
WritableRasterobject with the specified width and height. - Throws:
IllegalArgumentException- ifworhis less than or equal to zero- See Also:
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getDataElement
public int getDataElement(int[] components, int offset) Returns a pixel value represented as anintin thisColorModel, given an array of unnormalized color/alpha components. AnArrayIndexOutOfBoundsExceptionis thrown if thecomponentsarray is not large enough to hold all the color and alpha components, starting atoffset.- Overrides:
getDataElementin classColorModel- Parameters:
components- an array of unnormalized color and alpha componentsoffset- the index intocomponentsat which to begin retrieving the color and alpha components- Returns:
- an
intpixel value in thisColorModelcorresponding to the specified components. - Throws:
ArrayIndexOutOfBoundsException- if thecomponentsarray is not large enough to hold all of the color and alpha components starting atoffset
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getDataElements
Returns a data element array representation of a pixel in thisColorModel, given an array of unnormalized color/alpha components. This array can then be passed to thesetDataElementsmethod of aWritableRasterobject. AnArrayIndexOutOfBoundsExceptionis thrown if thecomponentsarray is not large enough to hold all the color and alpha components, starting at offset. If theobjvariable isnull, a new array is allocated. Ifobjis notnull, it must be a primitive array of typetransferType; otherwise, aClassCastExceptionis thrown. AnArrayIndexOutOfBoundsExceptionis thrown ifobjis not large enough to hold a pixel value for thisColorModel. SinceDirectColorModelcan 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 unsupportedtransferType.- Overrides:
getDataElementsin classColorModel- Parameters:
components- an array of unnormalized color and alpha componentsoffset- the index intocomponentsat which to begin retrieving color and alpha componentsobj- theObjectrepresenting an array of color and alpha components- Returns:
- an
Objectrepresenting an array of color and alpha components. - Throws:
ClassCastException- ifobjis not a primitive array of typetransferTypeArrayIndexOutOfBoundsException- ifobjis not large enough to hold a pixel value for thisColorModelor thecomponentsarray is not large enough to hold all of the color and alpha components starting atoffsetUnsupportedOperationException- if thistransferTypeis not supported by this color model- See Also:
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coerceData
Forces the raster data to match the state specified in theisAlphaPremultipliedvariable, assuming the data is currently correctly described by thisColorModel. 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 thisColorModelwith theisAlphaPremultipliedflag set appropriately. This method will throw aUnsupportedOperationExceptionif this transferType is not supported by thisColorModel. SinceColorModelcan 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.- Overrides:
coerceDatain classColorModel- Parameters:
raster- theWritableRasterdataisAlphaPremultiplied-trueif the alpha is premultiplied;falseotherwise- Returns:
- a
ColorModelobject that represents the coerced data. - Throws:
UnsupportedOperationException- if thistransferTypeis not supported by this color model
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isCompatibleRaster
Returnstrueifrasteris compatible with thisColorModelandfalseif it is not.- Overrides:
isCompatibleRasterin classColorModel- Parameters:
raster- theRasterobject to test for compatibility- Returns:
trueifrasteris compatible with thisColorModel;falseotherwise.
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toString
Returns aStringthat represents thisDirectColorModel.- Overrides:
toStringin classColorModel- Returns:
- a
Stringrepresenting thisDirectColorModel.
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