Class DirectColorModel
- 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, transferType
Fields declared in interface java.awt.Transparency
BITMASK, OPAQUE, TRANSLUCENT
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Constructor Summary
ConstructorDescriptionDirectColorModel
(int bits, int rmask, int gmask, int bmask) Constructs aDirectColorModel
from the specified masks that indicate which bits in anint
pixel representation contain the red, green and blue color samples.DirectColorModel
(int bits, int rmask, int gmask, int bmask, int amask) Constructs aDirectColorModel
from the specified masks that indicate which bits in anint
pixel 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 aDirectColorModel
from the specified parameters. -
Method Summary
Modifier and TypeMethodDescriptionfinal ColorModel
coerceData
(WritableRaster raster, boolean isAlphaPremultiplied) Forces the raster data to match the state specified in theisAlphaPremultiplied
variable, assuming the data is currently correctly described by thisColorModel
.final WritableRaster
createCompatibleWritableRaster
(int w, int h) Creates aWritableRaster
with the specified width and height that has a data layout (SampleModel
) compatible with thisColorModel
.final int
getAlpha
(int pixel) Returns the alpha component for the specified pixel, scaled from 0 to 255.int
Returns the alpha component for the specified pixel, scaled from 0 to 255.final int
Returns the mask indicating which bits in anint
pixel representation contain the alpha component.final int
getBlue
(int pixel) Returns the blue color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace
, sRGB.int
Returns the blue color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace
, sRGB.final int
Returns the mask indicating which bits in anint
pixel 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
.int
getDataElement
(int[] components, int offset) Returns a pixel value represented as anint
in 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 int
getGreen
(int pixel) Returns the green color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace
, sRGB.int
Returns the green color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace
, sRGB.final int
Returns the mask indicating which bits in anint
pixel representation contain the green color component.final int
getRed
(int pixel) Returns the red color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace
, sRGB.int
Returns the red color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace
, sRGB.final int
Returns the mask indicating which bits in anint
pixel representation contain the red color component.final int
getRGB
(int pixel) Returns the color/alpha components of the pixel in the default RGB color model format.int
Returns the color/alpha components for the specified pixel in the default RGB color model format.boolean
isCompatibleRaster
(Raster raster) Returnstrue
ifraster
is compatible with thisColorModel
andfalse
if it is not.toString()
Returns aString
that represents thisDirectColorModel
.Methods declared in class java.awt.image.PackedColorModel
createCompatibleSampleModel, equals, getAlphaRaster, getMask, getMasks, hashCode, isCompatibleSampleModel
Methods 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 aDirectColorModel
from the specified masks that indicate which bits in anint
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 anint
pixel representation. TheColorSpace
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.- 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 aDirectColorModel
from the specified masks that indicate which bits in anint
pixel representation contain the red, green and blue color samples and the alpha sample, if present. Ifamask
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 anint
pixel representation. Alpha, if present, is not premultiplied. TheColorSpace
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.- 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 aDirectColorModel
from 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 anint
pixel representation contain the red, green and blue color samples and the alpha sample, if present. Ifamask
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 anint
pixel representation. If there is alpha, theboolean
isAlphaPremultiplied
specifies how to interpret color and alpha samples in pixel values. If theboolean
istrue
, 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 specifiedColorSpace
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 componentisAlphaPremultiplied
-true
if color samples are premultiplied by the alpha sample;false
otherwisetransferType
- the type of array used to represent pixel values- Throws:
IllegalArgumentException
- ifspace
is 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 anint
pixel representation contain the red color component.- Returns:
- the mask, which indicates which bits of the
int
pixel representation contain the red color sample.
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getGreenMask
public final int getGreenMask()Returns the mask indicating which bits in anint
pixel representation contain the green color component.- Returns:
- the mask, which indicates which bits of the
int
pixel representation contain the green color sample.
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getBlueMask
public final int getBlueMask()Returns the mask indicating which bits in anint
pixel representation contain the blue color component.- Returns:
- the mask, which indicates which bits of the
int
pixel representation contain the blue color sample.
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getAlphaMask
public final int getAlphaMask()Returns the mask indicating which bits in anint
pixel representation contain the alpha component.- Returns:
- the mask, which indicates which bits of the
int
pixel 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:
getRed
in 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:
getGreen
in 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:
getBlue
in 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:
getAlpha
in classColorModel
- Parameters:
pixel
- the specified pixel- Returns:
- the value of the alpha component of
pixel
from 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:
getRGB
in classColorModel
- Parameters:
pixel
- the specified pixel- Returns:
- the RGB value of the color/alpha components of the specified pixel.
- See Also:
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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 typetransferType
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. IfinData
is not a primitive array of typetransferType
, aClassCastException
is thrown. AnArrayIndexOutOfBoundsException
is thrown ifinData
is not large enough to hold a pixel value for thisColorModel
. SinceDirectColorModel
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 unsupportedtransferType
. AnUnsupportedOperationException
is thrown if thistransferType
is not supported by thisColorModel
.- Overrides:
getRed
in classColorModel
- Parameters:
inData
- the array containing the pixel value- Returns:
- the value of the red component of the specified pixel.
- Throws:
ArrayIndexOutOfBoundsException
- ifinData
is not large enough to hold a pixel value for this color modelClassCastException
- ifinData
is not a primitive array of typetransferType
UnsupportedOperationException
- if thistransferType
is 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 typetransferType
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. IfinData
is not a primitive array of typetransferType
, aClassCastException
is thrown. AnArrayIndexOutOfBoundsException
is thrown ifinData
is not large enough to hold a pixel value for thisColorModel
. SinceDirectColorModel
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 unsupportedtransferType
. AnUnsupportedOperationException
is thrown if thistransferType
is not supported by thisColorModel
.- Overrides:
getGreen
in classColorModel
- Parameters:
inData
- the array containing the pixel value- Returns:
- the value of the green component of the specified pixel.
- Throws:
ArrayIndexOutOfBoundsException
- ifinData
is not large enough to hold a pixel value for this color modelClassCastException
- ifinData
is not a primitive array of typetransferType
UnsupportedOperationException
- if thistransferType
is 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 typetransferType
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. IfinData
is not a primitive array of typetransferType
, aClassCastException
is thrown. AnArrayIndexOutOfBoundsException
is thrown ifinData
is not large enough to hold a pixel value for thisColorModel
. SinceDirectColorModel
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 unsupportedtransferType
. AnUnsupportedOperationException
is thrown if thistransferType
is not supported by thisColorModel
.- Overrides:
getBlue
in classColorModel
- Parameters:
inData
- the array containing the pixel value- Returns:
- the value of the blue component of the specified pixel.
- Throws:
ArrayIndexOutOfBoundsException
- ifinData
is not large enough to hold a pixel value for this color modelClassCastException
- ifinData
is not a primitive array of typetransferType
UnsupportedOperationException
- if thistransferType
is 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 typetransferType
passed in as an object reference. IfinData
is not a primitive array of typetransferType
, aClassCastException
is thrown. AnArrayIndexOutOfBoundsException
is thrown ifinData
is not large enough to hold a pixel value for thisColorModel
. SinceDirectColorModel
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 unsupportedtransferType
. If thistransferType
is not supported, anUnsupportedOperationException
is thrown.- Overrides:
getAlpha
in classColorModel
- Parameters:
inData
- the specified pixel- Returns:
- the alpha component of the specified pixel, scaled from 0 to 255.
- Throws:
ClassCastException
- ifinData
is not a primitive array of typetransferType
ArrayIndexOutOfBoundsException
- ifinData
is not large enough to hold a pixel value for thisColorModel
UnsupportedOperationException
- if thistranferType
is 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 typetransferType
passed in as an object reference. IfinData
is not a primitive array of typetransferType
, aClassCastException
is thrown. AnArrayIndexOutOfBoundsException
is thrown ifinData
is 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. SinceDirectColorModel
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 unsupportedtransferType
.- Overrides:
getRGB
in classColorModel
- Parameters:
inData
- the specified pixel- Returns:
- the color and alpha components of the specified pixel.
- Throws:
UnsupportedOperationException
- if thistransferType
is 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 thesetDataElements
method of aWritableRaster
object. If the pixel variable isnull
, a new array is allocated. Ifpixel
is notnull
, it must be a primitive array of typetransferType
; otherwise, aClassCastException
is thrown. AnArrayIndexOutOfBoundsException
is thrown ifpixel
is not large enough to hold a pixel value for thisColorModel
. The pixel array is returned. SinceDirectColorModel
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 unsupportedtransferType
.- Overrides:
getDataElements
in 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
- ifpixel
is not a primitive array of typetransferType
ArrayIndexOutOfBoundsException
- ifpixel
is not large enough to hold a pixel value for thisColorModel
UnsupportedOperationException
- if thistransferType
is 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 thecomponents
array isnull
, a new array is allocated. Thecomponents
array is returned. Color/alpha components are stored in thecomponents
array starting atoffset
, even if the array is allocated by this method. AnArrayIndexOutOfBoundsException
is thrown if thecomponents
array is notnull
and is not large enough to hold all the color and alpha components, starting atoffset
.- Overrides:
getComponents
in classColorModel
- Parameters:
pixel
- the specified pixelcomponents
- the array to receive the color and alpha components of the specified pixeloffset
- the offset into thecomponents
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.
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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 typetransferType
passed in as an object reference. Ifpixel
is not a primitive array of typetransferType
, aClassCastException
is thrown. AnArrayIndexOutOfBoundsException
is thrown ifpixel
is not large enough to hold a pixel value for thisColorModel
. If thecomponents
array isnull
, a new array is allocated. Thecomponents
array is returned. Color/alpha components are stored in thecomponents
array starting atoffset
, even if the array is allocated by this method. AnArrayIndexOutOfBoundsException
is thrown if thecomponents
array is notnull
and is not large enough to hold all the color and alpha components, starting atoffset
. SinceDirectColorModel
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 unsupportedtransferType
.- Overrides:
getComponents
in classColorModel
- Parameters:
pixel
- the specified pixelcomponents
- the array to receive the color and alpha components of the specified pixeloffset
- the offset into thecomponents
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.
- Throws:
ClassCastException
- ifpixel
is not a primitive array of typetransferType
ArrayIndexOutOfBoundsException
- ifpixel
is not large enough to hold a pixel value for thisColorModel
, or ifcomponents
is notnull
and is not large enough to hold all the color and alpha components, starting atoffset
UnsupportedOperationException
- if thistransferType
is not supported by this color model
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createCompatibleWritableRaster
Creates aWritableRaster
with the specified width and height that has a data layout (SampleModel
) compatible with thisColorModel
.- Overrides:
createCompatibleWritableRaster
in classColorModel
- Parameters:
w
- the width to apply to the newWritableRaster
h
- the height to apply to the newWritableRaster
- Returns:
- a
WritableRaster
object with the specified width and height. - Throws:
IllegalArgumentException
- ifw
orh
is 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 anint
in thisColorModel
, given an array of unnormalized color/alpha components. AnArrayIndexOutOfBoundsException
is thrown if thecomponents
array is not large enough to hold all the color and alpha components, starting atoffset
.- Overrides:
getDataElement
in classColorModel
- Parameters:
components
- an array of unnormalized color and alpha componentsoffset
- the index intocomponents
at which to begin retrieving the color and alpha components- Returns:
- an
int
pixel value in thisColorModel
corresponding to the specified components. - Throws:
ArrayIndexOutOfBoundsException
- if thecomponents
array 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 thesetDataElements
method of aWritableRaster
object. AnArrayIndexOutOfBoundsException
is thrown if thecomponents
array is not large enough to hold all the color and alpha components, starting at offset. If theobj
variable isnull
, a new array is allocated. Ifobj
is notnull
, it must be a primitive array of typetransferType
; otherwise, aClassCastException
is thrown. AnArrayIndexOutOfBoundsException
is thrown ifobj
is not large enough to hold a pixel value for thisColorModel
. SinceDirectColorModel
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 unsupportedtransferType
.- Overrides:
getDataElements
in classColorModel
- Parameters:
components
- an array of unnormalized color and alpha componentsoffset
- the index intocomponents
at which to begin retrieving color and alpha componentsobj
- theObject
representing an array of color and alpha components- Returns:
- an
Object
representing an array of color and alpha components. - Throws:
ClassCastException
- ifobj
is not a primitive array of typetransferType
ArrayIndexOutOfBoundsException
- ifobj
is not large enough to hold a pixel value for thisColorModel
or thecomponents
array is not large enough to hold all of the color and alpha components starting atoffset
UnsupportedOperationException
- if thistransferType
is not supported by this color model- See Also:
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coerceData
Forces the raster data to match the state specified in theisAlphaPremultiplied
variable, 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 thisColorModel
with theisAlphaPremultiplied
flag set appropriately. This method will throw aUnsupportedOperationException
if this transferType is not supported by thisColorModel
. SinceColorModel
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.- Overrides:
coerceData
in classColorModel
- Parameters:
raster
- theWritableRaster
dataisAlphaPremultiplied
-true
if the alpha is premultiplied;false
otherwise- Returns:
- a
ColorModel
object that represents the coerced data. - Throws:
UnsupportedOperationException
- if thistransferType
is not supported by this color model
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isCompatibleRaster
Returnstrue
ifraster
is compatible with thisColorModel
andfalse
if it is not.- Overrides:
isCompatibleRaster
in classColorModel
- Parameters:
raster
- theRaster
object to test for compatibility- Returns:
true
ifraster
is compatible with thisColorModel
;false
otherwise.
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toString
Returns aString
that represents thisDirectColorModel
.- Overrides:
toString
in classColorModel
- Returns:
- a
String
representing thisDirectColorModel
.
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