- java.lang.Object
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- java.awt.image.ColorModel
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- java.awt.image.ComponentColorModel
 
 
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- All Implemented Interfaces:
- Transparency
 
 public class ComponentColorModel extends ColorModel AColorModelclass that works with pixel values that represent color and alpha information as separate samples and that store each sample in a separate data element. This class can be used with an arbitraryColorSpace. The number of color samples in the pixel values must be same as the number of color components in theColorSpace. There may be a single alpha sample.For those methods that use a primitive array pixel representation of type transferType, the array length is the same as the number of color and alpha samples. Color samples are stored first in the array followed by the alpha sample, if present. The order of the color samples is specified by theColorSpace. Typically, this order reflects the name of the color space type. For example, forTYPE_RGB, index 0 corresponds to red, index 1 to green, and index 2 to blue.The translation from pixel sample values to color/alpha components for display or processing purposes is based on a one-to-one correspondence of samples to components. Depending on the transfer type used to create an instance of ComponentColorModel, the pixel sample values represented by that instance may be signed or unsigned and may be of integral type or float or double (see below for details). The translation from sample values to normalized color/alpha components must follow certain rules. For float and double samples, the translation is an identity, i.e. normalized component values are equal to the corresponding sample values. For integral samples, the translation should be only a simple scale and offset, where the scale and offset constants may be different for each component. The result of applying the scale and offset constants is a set of color/alpha component values, which are guaranteed to fall within a certain range. Typically, the range for a color component will be the range defined by thegetMinValueandgetMaxValuemethods of theColorSpaceclass. The range for an alpha component should be 0.0 to 1.0.Instances of ComponentColorModelcreated with transfer typesDataBuffer.TYPE_BYTE,DataBuffer.TYPE_USHORT, andDataBuffer.TYPE_INThave pixel sample values which are treated as unsigned integral values. The number of bits in a color or alpha sample of a pixel value might not be the same as the number of bits for the corresponding color or alpha sample passed to theComponentColorModel(ColorSpace, int[], boolean, boolean, int, int)constructor. In that case, this class assumes that the least significant n bits of a sample value hold the component value, where n is the number of significant bits for the component passed to the constructor. It also assumes that any higher-order bits in a sample value are zero. Thus, sample values range from 0 to 2n - 1. This class maps these sample values to normalized color component values such that 0 maps to the value obtained from theColorSpace's getMinValuemethod for each component and 2n - 1 maps to the value obtained fromgetMaxValue. To create aComponentColorModelwith a different color sample mapping requires subclassing this class and overriding thegetNormalizedComponents(Object, float[], int)method. The mapping for an alpha sample always maps 0 to 0.0 and 2n - 1 to 1.0.For instances with unsigned sample values, the unnormalized color/alpha component representation is only supported if two conditions hold. First, sample value 0 must map to normalized component value 0.0 and sample value 2n - 1 to 1.0. Second the min/max range of all color components of the ColorSpacemust be 0.0 to 1.0. In this case, the component representation is the n least significant bits of the corresponding sample. Thus each component is an unsigned integral value between 0 and 2n - 1, where n is the number of significant bits for a particular component. If these conditions are not met, any method taking an unnormalized component argument will throw anIllegalArgumentException.Instances of ComponentColorModelcreated with transfer typesDataBuffer.TYPE_SHORT,DataBuffer.TYPE_FLOAT, andDataBuffer.TYPE_DOUBLEhave pixel sample values which are treated as signed short, float, or double values. Such instances do not support the unnormalized color/alpha component representation, so any methods taking such a representation as an argument will throw anIllegalArgumentExceptionwhen called on one of these instances. The normalized component values of instances of this class have a range which depends on the transfer type as follows: for float samples, the full range of the float data type; for double samples, the full range of the float data type (resulting from casting double to float); for short samples, from approximately -maxVal to +maxVal, where maxVal is the per component maximum value for theColorSpace(-32767 maps to -maxVal, 0 maps to 0.0, and 32767 maps to +maxVal). A subclass may override the scaling for short sample values to normalized component values by overriding thegetNormalizedComponents(Object, float[], int)method. For float and double samples, the normalized component values are taken to be equal to the corresponding sample values, and subclasses should not attempt to add any non-identity scaling for these transfer types.Instances of ComponentColorModelcreated with transfer typesDataBuffer.TYPE_SHORT,DataBuffer.TYPE_FLOAT, andDataBuffer.TYPE_DOUBLEuse all the bits of all sample values. Thus all color/alpha components have 16 bits when usingDataBuffer.TYPE_SHORT, 32 bits when usingDataBuffer.TYPE_FLOAT, and 64 bits when usingDataBuffer.TYPE_DOUBLE. When theComponentColorModel(ColorSpace, int[], boolean, boolean, int, int)form of constructor is used with one of these transfer types, the bits array argument is ignored.It is possible to have color/alpha sample values which cannot be reasonably interpreted as component values for rendering. This can happen when ComponentColorModelis subclassed to override the mapping of unsigned sample values to normalized color component values or when signed sample values outside a certain range are used. (As an example, specifying an alpha component as a signed short value outside the range 0 to 32767, normalized range 0.0 to 1.0, can lead to unexpected results.) It is the responsibility of applications to appropriately scale pixel data before rendering such that color components fall within the normalized range of theColorSpace(obtained using thegetMinValueandgetMaxValuemethods of theColorSpaceclass) and the alpha component is between 0.0 and 1.0. If color or alpha component values fall outside these ranges, rendering results are indeterminate.Methods that use a single int pixel representation throw an IllegalArgumentException, unless the number of components for theComponentColorModelis one and the component value is unsigned -- in other words, a single color component using a transfer type ofDataBuffer.TYPE_BYTE,DataBuffer.TYPE_USHORT, orDataBuffer.TYPE_INTand no alpha.A ComponentColorModelcan be used in conjunction with aComponentSampleModel, aBandedSampleModel, or aPixelInterleavedSampleModelto construct aBufferedImage.
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Field Summary- 
Fields declared in class java.awt.image.ColorModelpixel_bits, transferType
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Fields declared in interface java.awt.TransparencyBITMASK, OPAQUE, TRANSLUCENT
 
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Constructor SummaryConstructors Constructor Description ComponentColorModel(ColorSpace colorSpace, boolean hasAlpha, boolean isAlphaPremultiplied, int transparency, int transferType)Constructs aComponentColorModelfrom the specified parameters.ComponentColorModel(ColorSpace colorSpace, int[] bits, boolean hasAlpha, boolean isAlphaPremultiplied, int transparency, int transferType)Constructs aComponentColorModelfrom the specified parameters.
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description 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.SampleModelcreateCompatibleSampleModel(int w, int h)Creates aSampleModelwith the specified width and height, that has a data layout compatible with thisColorModel.WritableRastercreateCompatibleWritableRaster(int w, int h)Creates aWritableRasterwith the specified width and height, that has a data layout (SampleModel) compatible with thisColorModel.booleanequals(Object obj)Tests if the specifiedObjectis an instance ofComponentColorModeland equals thisComponentColorModel.intgetAlpha(int pixel)Returns the alpha component for the specified pixel, scaled from 0 to 255.intgetAlpha(Object inData)Returns the alpha component for the specified pixel, scaled from 0 to 255.WritableRastergetAlphaRaster(WritableRaster raster)Returns aRasterrepresenting the alpha channel of an image, extracted from the inputRaster.intgetBlue(int pixel)Returns the blue color component for the specified pixel, scaled from 0 to 255 in the default RGB ColorSpace, sRGB.intgetBlue(Object inData)Returns the blue color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace, sRGB.int[]getComponents(int pixel, int[] components, int offset)Returns an array of unnormalized color/alpha components given a pixel in thisColorModel.int[]getComponents(Object pixel, int[] components, int offset)Returns an array of unnormalized color/alpha components given a pixel in thisColorModel.intgetDataElement(float[] normComponents, int normOffset)Returns a pixel value represented as anintin thisColorModel, given an array of normalized color/alpha components.intgetDataElement(int[] components, int offset)Returns a pixel value represented as an int in thisColorModel, given an array of unnormalized color/alpha components.ObjectgetDataElements(float[] normComponents, int normOffset, Object obj)Returns a data element array representation of a pixel in thisColorModel, given an array of normalized color/alpha components.ObjectgetDataElements(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.ObjectgetDataElements(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.intgetGreen(int pixel)Returns the green color component for the specified pixel, scaled from 0 to 255 in the default RGB ColorSpace, sRGB.intgetGreen(Object inData)Returns the green color component for the specified pixel, scaled from 0 to 255 in the default RGBColorSpace, sRGB.float[]getNormalizedComponents(int[] components, int offset, float[] normComponents, int normOffset)Returns an array of all of the color/alpha components in normalized form, given an unnormalized component array.float[]getNormalizedComponents(Object pixel, float[] normComponents, int normOffset)Returns an array of all of the color/alpha components in normalized form, given a pixel in thisColorModel.intgetRed(int pixel)Returns the red color component for the specified pixel, scaled from 0 to 255 in the default RGB ColorSpace, sRGB.intgetRed(Object inData)Returns the red color component for the specified pixel, scaled from 0 to 255 in the default RGB ColorSpace, sRGB.intgetRGB(int pixel)Returns the color/alpha components of the pixel in the default RGB color model format.intgetRGB(Object inData)Returns the color/alpha components for the specified pixel in the default RGB color model format.int[]getUnnormalizedComponents(float[] normComponents, int normOffset, int[] components, int offset)Returns an array of all of the color/alpha components in unnormalized form, given a normalized component array.inthashCode()Returns the hash code for this ComponentColorModel.booleanisCompatibleRaster(Raster raster)Returns true ifrasteris compatible with thisColorModel; false if it is not.booleanisCompatibleSampleModel(SampleModel sm)Checks whether or not the specifiedSampleModelis compatible with thisColorModel.- 
Methods declared in class java.awt.image.ColorModelfinalize, getColorSpace, getComponentSize, getComponentSize, getNumColorComponents, getNumComponents, getPixelSize, getRGBdefault, getTransferType, getTransparency, hasAlpha, isAlphaPremultiplied, toString
 
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Constructor Detail- 
ComponentColorModelpublic ComponentColorModel(ColorSpace colorSpace, int[] bits, boolean hasAlpha, boolean isAlphaPremultiplied, int transparency, int transferType) Constructs aComponentColorModelfrom the specified parameters. Color components will be in the specifiedColorSpace. The supported transfer types areDataBuffer.TYPE_BYTE,DataBuffer.TYPE_USHORT,DataBuffer.TYPE_INT,DataBuffer.TYPE_SHORT,DataBuffer.TYPE_FLOAT, andDataBuffer.TYPE_DOUBLE. If not null, thebitsarray specifies the number of significant bits per color and alpha component and its length should be at least the number of components in theColorSpaceif there is no alpha information in the pixel values, or one more than this number if there is alpha information. When thetransferTypeisDataBuffer.TYPE_SHORT,DataBuffer.TYPE_FLOAT, orDataBuffer.TYPE_DOUBLEthebitsarray argument is ignored.hasAlphaindicates whether alpha information is present. IfhasAlphais true, then the booleanisAlphaPremultipliedspecifies 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. Thetransparencyspecifies what alpha values can be represented by this color model. The acceptabletransparencyvalues areOPAQUE,BITMASKorTRANSLUCENT. ThetransferTypeis the type of primitive array used to represent pixel values.- Parameters:
- colorSpace- The- ColorSpaceassociated with this color model.
- bits- The number of significant bits per component. May be null, in which case all bits of all component samples will be significant. Ignored if transferType is one of- DataBuffer.TYPE_SHORT,- DataBuffer.TYPE_FLOAT, or- DataBuffer.TYPE_DOUBLE, in which case all bits of all component samples will be significant.
- hasAlpha- If true, this color model supports alpha.
- isAlphaPremultiplied- If true, alpha is premultiplied.
- transparency- Specifies what alpha values can be represented by this color model.
- transferType- Specifies the type of primitive array used to represent pixel values.
- Throws:
- IllegalArgumentException- If the- bitsarray argument is not null, its length is less than the number of color and alpha components, and transferType is one of- DataBuffer.TYPE_BYTE,- DataBuffer.TYPE_USHORT, or- DataBuffer.TYPE_INT.
- IllegalArgumentException- If transferType is not one of- DataBuffer.TYPE_BYTE,- DataBuffer.TYPE_USHORT,- DataBuffer.TYPE_INT,- DataBuffer.TYPE_SHORT,- DataBuffer.TYPE_FLOAT, or- DataBuffer.TYPE_DOUBLE.
- See Also:
- ColorSpace,- Transparency
 
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ComponentColorModelpublic ComponentColorModel(ColorSpace colorSpace, boolean hasAlpha, boolean isAlphaPremultiplied, int transparency, int transferType) Constructs aComponentColorModelfrom the specified parameters. Color components will be in the specifiedColorSpace. The supported transfer types areDataBuffer.TYPE_BYTE,DataBuffer.TYPE_USHORT,DataBuffer.TYPE_INT,DataBuffer.TYPE_SHORT,DataBuffer.TYPE_FLOAT, andDataBuffer.TYPE_DOUBLE. The number of significant bits per color and alpha component will be 8, 16, 32, 16, 32, or 64, respectively. The number of color components will be the number of components in theColorSpace. There will be an alpha component ifhasAlphaistrue. IfhasAlphais true, then the booleanisAlphaPremultipliedspecifies 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. Thetransparencyspecifies what alpha values can be represented by this color model. The acceptabletransparencyvalues areOPAQUE,BITMASKorTRANSLUCENT. ThetransferTypeis the type of primitive array used to represent pixel values.- Parameters:
- colorSpace- The- ColorSpaceassociated with this color model.
- hasAlpha- If true, this color model supports alpha.
- isAlphaPremultiplied- If true, alpha is premultiplied.
- transparency- Specifies what alpha values can be represented by this color model.
- transferType- Specifies the type of primitive array used to represent pixel values.
- Throws:
- IllegalArgumentException- If transferType is not one of- DataBuffer.TYPE_BYTE,- DataBuffer.TYPE_USHORT,- DataBuffer.TYPE_INT,- DataBuffer.TYPE_SHORT,- DataBuffer.TYPE_FLOAT, or- DataBuffer.TYPE_DOUBLE.
- Since:
- 1.4
- See Also:
- ColorSpace,- Transparency
 
 
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Method Detail- 
getRedpublic int getRed(int pixel) 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 will be a non pre-multiplied value. If the alpha is premultiplied, this method divides it out before returning the value (if the alpha value is 0, the red value will be 0).- Specified by:
- getRedin class- ColorModel
- Parameters:
- pixel- The pixel from which you want to get the red color component.
- Returns:
- The red color component for the specified pixel, as an int.
- Throws:
- IllegalArgumentException- If there is more than one component in this- ColorModel.
- IllegalArgumentException- If the component value for this- ColorModelis signed
 
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getGreenpublic int getGreen(int 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 as an int. The returned value will be a non pre-multiplied value. If the alpha is premultiplied, this method divides it out before returning the value (if the alpha value is 0, the green value will be 0).- Specified by:
- getGreenin class- ColorModel
- Parameters:
- pixel- The pixel from which you want to get the green color component.
- Returns:
- The green color component for the specified pixel, as an int.
- Throws:
- IllegalArgumentException- If there is more than one component in this- ColorModel.
- IllegalArgumentException- If the component value for this- ColorModelis signed
 
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getBluepublic int getBlue(int 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 as an int. The returned value will be a non pre-multiplied value. If the alpha is premultiplied, this method divides it out before returning the value (if the alpha value is 0, the blue value will be 0).- Specified by:
- getBluein class- ColorModel
- Parameters:
- pixel- The pixel from which you want to get the blue color component.
- Returns:
- The blue color component for the specified pixel, as an int.
- Throws:
- IllegalArgumentException- If there is more than one component in this- ColorModel.
- IllegalArgumentException- If the component value for this- ColorModelis signed
 
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getAlphapublic int getAlpha(int pixel) Returns the alpha component for the specified pixel, scaled from 0 to 255. The pixel value is specified as an int.- Specified by:
- getAlphain class- ColorModel
- Parameters:
- pixel- The pixel from which you want to get the alpha component.
- Returns:
- The alpha component for the specified pixel, as an int.
- Throws:
- IllegalArgumentException- If there is more than one component in this- ColorModel.
- IllegalArgumentException- If the component value for this- ColorModelis signed
 
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getRGBpublic 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 returned value will be in a non pre-multiplied format. If the alpha is premultiplied, this method divides it out of the color components (if the alpha value is 0, the color values will be 0).- Overrides:
- getRGBin class- ColorModel
- Parameters:
- pixel- The pixel from which you want to get the color/alpha components.
- Returns:
- The color/alpha components for the specified pixel, as an int.
- Throws:
- IllegalArgumentException- If there is more than one component in this- ColorModel.
- IllegalArgumentException- If the component value for this- ColorModelis signed
- See Also:
- ColorModel.getRGBdefault()
 
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getRedpublic int getRed(Object inData) 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. Thepixelvalue is specified by an array of data elements of typetransferTypepassed in as an object reference. The returned value will be a non pre-multiplied value. If the alpha is premultiplied, this method divides it out before returning the value (if the alpha value is 0, the red value will be 0). SinceComponentColorModelcan 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:
- getRedin class- ColorModel
- Parameters:
- inData- The pixel from which you want to get the red color component, specified by an array of data elements of type- transferType.
- Returns:
- The red color component for the specified pixel, as an int.
- Throws:
- ClassCastException- If- inDatais not a primitive array of type- transferType.
- ArrayIndexOutOfBoundsException- if- inDatais not large enough to hold a pixel value for this- ColorModel.
- UnsupportedOperationException- If the transfer type of this- ComponentColorModelis not one of the supported transfer types:- DataBuffer.TYPE_BYTE,- DataBuffer.TYPE_USHORT,- DataBuffer.TYPE_INT,- DataBuffer.TYPE_SHORT,- DataBuffer.TYPE_FLOAT, or- DataBuffer.TYPE_DOUBLE.
 
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getGreenpublic int getGreen(Object inData) 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. Thepixelvalue is specified by an array of data elements of typetransferTypepassed in as an object reference. The returned value is a non pre-multiplied value. If the alpha is premultiplied, this method divides it out before returning the value (if the alpha value is 0, the green value will be 0). SinceComponentColorModelcan 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:
- getGreenin class- ColorModel
- Parameters:
- inData- The pixel from which you want to get the green color component, specified by an array of data elements of type- transferType.
- Returns:
- The green color component for the specified pixel, as an int.
- Throws:
- ClassCastException- If- inDatais not a primitive array of type- transferType.
- ArrayIndexOutOfBoundsException- if- inDatais not large enough to hold a pixel value for this- ColorModel.
- UnsupportedOperationException- If the transfer type of this- ComponentColorModelis not one of the supported transfer types:- DataBuffer.TYPE_BYTE,- DataBuffer.TYPE_USHORT,- DataBuffer.TYPE_INT,- DataBuffer.TYPE_SHORT,- DataBuffer.TYPE_FLOAT, or- DataBuffer.TYPE_DOUBLE.
 
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getBluepublic int getBlue(Object inData) 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. Thepixelvalue is specified by an array of data elements of typetransferTypepassed in as an object reference. The returned value is a non pre-multiplied value. If the alpha is premultiplied, this method divides it out before returning the value (if the alpha value is 0, the blue value will be 0). SinceComponentColorModelcan 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:
- getBluein class- ColorModel
- Parameters:
- inData- The pixel from which you want to get the blue color component, specified by an array of data elements of type- transferType.
- Returns:
- The blue color component for the specified pixel, as an int.
- Throws:
- ClassCastException- If- inDatais not a primitive array of type- transferType.
- ArrayIndexOutOfBoundsException- if- inDatais not large enough to hold a pixel value for this- ColorModel.
- UnsupportedOperationException- If the transfer type of this- ComponentColorModelis not one of the supported transfer types:- DataBuffer.TYPE_BYTE,- DataBuffer.TYPE_USHORT,- DataBuffer.TYPE_INT,- DataBuffer.TYPE_SHORT,- DataBuffer.TYPE_FLOAT, or- DataBuffer.TYPE_DOUBLE.
 
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getAlphapublic int getAlpha(Object inData) 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. SinceComponentColorModelcan 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:
- getAlphain class- ColorModel
- Parameters:
- inData- The pixel from which you want to get the alpha component, specified by an array of data elements of type- transferType.
- Returns:
- The alpha component for the specified pixel, as an int.
- Throws:
- ClassCastException- If- inDatais not a primitive array of type- transferType.
- ArrayIndexOutOfBoundsException- if- inDatais not large enough to hold a pixel value for this- ColorModel.
- UnsupportedOperationException- If the transfer type of this- ComponentColorModelis not one of the supported transfer types:- DataBuffer.TYPE_BYTE,- DataBuffer.TYPE_USHORT,- DataBuffer.TYPE_INT,- DataBuffer.TYPE_SHORT,- DataBuffer.TYPE_FLOAT, or- DataBuffer.TYPE_DOUBLE.
 
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getRGBpublic int getRGB(Object inData) 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. The returned value is in a non pre-multiplied format. If the alpha is premultiplied, this method divides it out of the color components (if the alpha value is 0, the color values will be 0). SinceComponentColorModelcan 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 class- ColorModel
- Parameters:
- inData- The pixel from which you want to get the color/alpha components, specified by an array of data elements of type- transferType.
- Returns:
- The color/alpha components for the specified pixel, as an int.
- Throws:
- ClassCastException- If- inDatais not a primitive array of type- transferType.
- ArrayIndexOutOfBoundsException- if- inDatais not large enough to hold a pixel value for this- ColorModel.
- UnsupportedOperationException- If the transfer type of this- ComponentColorModelis not one of the supported transfer types:- DataBuffer.TYPE_BYTE,- DataBuffer.TYPE_USHORT,- DataBuffer.TYPE_INT,- DataBuffer.TYPE_SHORT,- DataBuffer.TYPE_FLOAT, or- DataBuffer.TYPE_DOUBLE.
- See Also:
- ColorModel.getRGBdefault()
 
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getDataElementspublic Object 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. This array can then be passed to thesetDataElementsmethod of aWritableRasterobject. If thepixelparameter is null, a new array is allocated. SinceComponentColorModelcan 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 class- ColorModel
- Parameters:
- rgb- the integer representation of the pixel in the RGB color model
- pixel- the specified pixel
- Returns:
- The data element array representation of a pixel
 in this ColorModel.
- Throws:
- ClassCastException- If- pixelis not null and is not a primitive array of type- transferType.
- ArrayIndexOutOfBoundsException- If- pixelis not large enough to hold a pixel value for this- ColorModel.
- UnsupportedOperationException- If the transfer type of this- ComponentColorModelis not one of the supported transfer types:- DataBuffer.TYPE_BYTE,- DataBuffer.TYPE_USHORT,- DataBuffer.TYPE_INT,- DataBuffer.TYPE_SHORT,- DataBuffer.TYPE_FLOAT, or- DataBuffer.TYPE_DOUBLE.
- See Also:
- WritableRaster.setDataElements(int, int, java.lang.Object),- SampleModel.setDataElements(int, int, java.lang.Object, java.awt.image.DataBuffer)
 
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getComponentspublic int[] getComponents(int pixel, int[] components, int offset)Returns an array of unnormalized color/alpha components given a pixel in thisColorModel. An IllegalArgumentException is thrown if the component value for thisColorModelis not conveniently representable in the unnormalized form. Color/alpha components are stored in thecomponentsarray starting atoffset(even if the array is allocated by this method).- Overrides:
- getComponentsin class- ColorModel
- Parameters:
- pixel- The pixel value specified as an integer.
- components- An integer array in which to store the unnormalized color/alpha components. If the- componentsarray is null, a new array is allocated.
- offset- An offset into the- componentsarray.
- Returns:
- The components array.
- Throws:
- IllegalArgumentException- If there is more than one component in this- ColorModel.
- IllegalArgumentException- If this- ColorModeldoes not support the unnormalized form
- ArrayIndexOutOfBoundsException- If the- componentsarray is not null and is not large enough to hold all the color and alpha components (starting at offset).
 
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getComponentspublic int[] getComponents(Object pixel, int[] components, int offset) 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. An IllegalArgumentException is thrown if the component values for thisColorModelare not conveniently representable in the unnormalized form. Color/alpha components are stored in thecomponentsarray starting atoffset(even if the array is allocated by this method). SinceComponentColorModelcan be subclassed, subclasses inherit the implementation of this method and if they don't override it then this method might throw an exception if they use an unsupportedtransferType.- Overrides:
- getComponentsin class- ColorModel
- Parameters:
- pixel- A pixel value specified by an array of data elements of type- transferType.
- components- An integer array in which to store the unnormalized color/alpha components. If the- componentsarray is null, a new array is allocated.
- offset- An offset into the- componentsarray.
- Returns:
- The componentsarray.
- Throws:
- IllegalArgumentException- If this- ComponentColorModeldoes not support the unnormalized form
- UnsupportedOperationException- in some cases iff the transfer type of this- ComponentColorModelis not one of the following transfer types:- DataBuffer.TYPE_BYTE,- DataBuffer.TYPE_USHORT, or- DataBuffer.TYPE_INT.
- ClassCastException- If- pixelis not a primitive array of type- transferType.
- IllegalArgumentException- If the- componentsarray is not null and is not large enough to hold all the color and alpha components (starting at offset), or if- pixelis not large enough to hold a pixel value for this ColorModel.
 
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getUnnormalizedComponentspublic int[] getUnnormalizedComponents(float[] normComponents, int normOffset, int[] components, int offset)Returns an array of all of the color/alpha components in unnormalized form, given a normalized component array. Unnormalized components are unsigned integral values between 0 and 2n - 1, where n is the number of bits for a particular component. Normalized components are float values between a per component minimum and maximum specified by theColorSpaceobject for thisColorModel. AnIllegalArgumentExceptionwill be thrown if color component values for thisColorModelare not conveniently representable in the unnormalized form. If thecomponentsarray isnull, a new array will be allocated. Thecomponentsarray will be 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). AnIllegalArgumentExceptionis thrown if thenormComponentsarray is not large enough to hold all the color and alpha components starting atnormOffset.- Overrides:
- getUnnormalizedComponentsin class- ColorModel
- Parameters:
- normComponents- an array containing normalized components
- normOffset- the offset into the- normComponentsarray at which to start retrieving normalized components
- components- an array that receives the components from- normComponents
- offset- the index into- componentsat which to begin storing normalized components from- normComponents
- Returns:
- an array containing unnormalized color and alpha components.
- Throws:
- IllegalArgumentException- If this- ComponentColorModeldoes not support the unnormalized form
- IllegalArgumentException- if the length of- normComponentsminus- normOffsetis less than- numComponents
 
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getNormalizedComponentspublic float[] getNormalizedComponents(int[] components, int offset, float[] normComponents, int normOffset)Returns an array of all of the color/alpha components in normalized form, given an unnormalized component array. Unnormalized components are unsigned integral values between 0 and 2n - 1, where n is the number of bits for a particular component. Normalized components are float values between a per component minimum and maximum specified by theColorSpaceobject for thisColorModel. AnIllegalArgumentExceptionwill be thrown if color component values for thisColorModelare not conveniently representable in the unnormalized form. If thenormComponentsarray isnull, a new array will be allocated. ThenormComponentsarray will be returned. Color/alpha components are stored in thenormComponentsarray starting atnormOffset(even if the array is allocated by this method). AnArrayIndexOutOfBoundsExceptionis thrown if thenormComponentsarray is notnulland is not large enough to hold all the color and alpha components (starting atnormOffset). AnIllegalArgumentExceptionis thrown if thecomponentsarray is not large enough to hold all the color and alpha components starting atoffset.- Overrides:
- getNormalizedComponentsin class- ColorModel
- Parameters:
- components- an array containing unnormalized components
- offset- the offset into the- componentsarray at which to start retrieving unnormalized components
- normComponents- an array that receives the normalized components
- normOffset- the index into- normComponentsat which to begin storing normalized components
- Returns:
- an array containing normalized color and alpha components.
- Throws:
- IllegalArgumentException- If this- ComponentColorModeldoes not support the unnormalized form
 
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getDataElementpublic int getDataElement(int[] components, int offset)Returns a pixel value represented as an int in thisColorModel, given an array of unnormalized color/alpha components.- Overrides:
- getDataElementin class- ColorModel
- Parameters:
- components- An array of unnormalized color/alpha components.
- offset- An offset into the- componentsarray.
- Returns:
- A pixel value represented as an int.
- Throws:
- IllegalArgumentException- If there is more than one component in this- ColorModel.
- IllegalArgumentException- If this- ComponentColorModeldoes not support the unnormalized form
 
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getDataElementspublic Object 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. This array can then be passed to thesetDataElementsmethod of aWritableRasterobject.- Overrides:
- getDataElementsin class- ColorModel
- Parameters:
- components- An array of unnormalized color/alpha components.
- offset- The integer offset into the- componentsarray.
- obj- The object in which to store the data element array representation of the pixel. If- objvariable is null, a new array is allocated. If- objis not null, it must be a primitive array of type- transferType. An- ArrayIndexOutOfBoundsExceptionis thrown if- objis not large enough to hold a pixel value for this- ColorModel. Since- ComponentColorModelcan 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.
- Returns:
- The data element array representation of a pixel
 in this ColorModel.
- Throws:
- IllegalArgumentException- If the components array is not large enough to hold all the color and alpha components (starting at offset).
- ClassCastException- If- objis not null and is not a primitive array of type- transferType.
- ArrayIndexOutOfBoundsException- If- objis not large enough to hold a pixel value for this- ColorModel.
- IllegalArgumentException- If this- ComponentColorModeldoes not support the unnormalized form
- UnsupportedOperationException- If the transfer type of this- ComponentColorModelis not one of the following transfer types:- DataBuffer.TYPE_BYTE,- DataBuffer.TYPE_USHORT, or- DataBuffer.TYPE_INT.
- See Also:
- WritableRaster.setDataElements(int, int, java.lang.Object),- SampleModel.setDataElements(int, int, java.lang.Object, java.awt.image.DataBuffer)
 
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getDataElementpublic int getDataElement(float[] normComponents, int normOffset)Returns a pixel value represented as anintin thisColorModel, given an array of normalized color/alpha components. This method will throw anIllegalArgumentExceptionif pixel values for thisColorModelare not conveniently representable as a singleint. AnArrayIndexOutOfBoundsExceptionis thrown if thenormComponentsarray is not large enough to hold all the color and alpha components (starting atnormOffset).- Overrides:
- getDataElementin class- ColorModel
- Parameters:
- normComponents- an array of normalized color and alpha components
- normOffset- the index into- normComponentsat which to begin retrieving the color and alpha components
- Returns:
- an intpixel value in thisColorModelcorresponding to the specified components.
- Throws:
- IllegalArgumentException- if pixel values for this- ColorModelare not conveniently representable as a single- int
- ArrayIndexOutOfBoundsException- if the- normComponentsarray is not large enough to hold all of the color and alpha components starting at- normOffset
- Since:
- 1.4
 
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getDataElementspublic Object getDataElements(float[] normComponents, int normOffset, Object obj) Returns a data element array representation of a pixel in thisColorModel, given an array of normalized color/alpha components. This array can then be passed to thesetDataElementsmethod of aWritableRasterobject. AnArrayIndexOutOfBoundsExceptionis thrown if thenormComponentsarray is not large enough to hold all the color and alpha components (starting atnormOffset). If theobjvariable isnull, a new array will be allocated. Ifobjis notnull, it must be a primitive array of type transferType; otherwise, aClassCastExceptionis thrown. AnArrayIndexOutOfBoundsExceptionis thrown ifobjis not large enough to hold a pixel value for thisColorModel.- Overrides:
- getDataElementsin class- ColorModel
- Parameters:
- normComponents- an array of normalized color and alpha components
- normOffset- the index into- normComponentsat which to begin retrieving color and alpha components
- obj- a primitive data array to hold the returned pixel
- Returns:
- an Objectwhich is a primitive data array representation of a pixel
- Throws:
- ClassCastException- if- objis not a primitive array of type- transferType
- ArrayIndexOutOfBoundsException- if- objis not large enough to hold a pixel value for this- ColorModelor the- normComponentsarray is not large enough to hold all of the color and alpha components starting at- normOffset
- Since:
- 1.4
- See Also:
- WritableRaster.setDataElements(int, int, java.lang.Object),- SampleModel.setDataElements(int, int, java.lang.Object, java.awt.image.DataBuffer)
 
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getNormalizedComponentspublic float[] getNormalizedComponents(Object pixel, float[] normComponents, int normOffset) Returns an array of all of the color/alpha components in normalized form, given a pixel in thisColorModel. 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, aClassCastExceptionis thrown. AnArrayIndexOutOfBoundsExceptionis thrown ifpixelis not large enough to hold a pixel value for thisColorModel. Normalized components are float values between a per component minimum and maximum specified by theColorSpaceobject for thisColorModel. If thenormComponentsarray isnull, a new array will be allocated. ThenormComponentsarray will be returned. Color/alpha components are stored in thenormComponentsarray starting atnormOffset(even if the array is allocated by this method). AnArrayIndexOutOfBoundsExceptionis thrown if thenormComponentsarray is notnulland is not large enough to hold all the color and alpha components (starting atnormOffset).This method must be overridden by a subclass if that subclass is designed to translate pixel sample values to color component values in a non-default way. The default translations implemented by this class is described in the class comments. Any subclass implementing a non-default translation must follow the constraints on allowable translations defined there. - Overrides:
- getNormalizedComponentsin class- ColorModel
- Parameters:
- pixel- the specified pixel
- normComponents- an array to receive the normalized components
- normOffset- the offset into the- normComponentsarray at which to start storing normalized components
- Returns:
- an array containing normalized color and alpha components.
- Throws:
- ClassCastException- if- pixelis not a primitive array of type transferType
- ArrayIndexOutOfBoundsException- if- normComponentsis not large enough to hold all color and alpha components starting at- normOffset
- ArrayIndexOutOfBoundsException- if- pixelis not large enough to hold a pixel value for this- ColorModel.
- Since:
- 1.4
 
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coerceDatapublic ColorModel coerceData(WritableRaster raster, boolean isAlphaPremultiplied) 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 also returns an instance of thisColorModelwith theisAlphaPremultipliedflag set appropriately. 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 unsupportedtransferType.- Overrides:
- coerceDatain class- ColorModel
- Parameters:
- raster- the- WritableRasterdata
- isAlphaPremultiplied-- trueif the alpha is premultiplied;- falseotherwise
- Returns:
- a ColorModelobject that represents the coerced data.
- Throws:
- NullPointerException- if- rasteris- nulland data coercion is required.
- UnsupportedOperationException- if the transfer type of this- ComponentColorModelis not one of the supported transfer types:- DataBuffer.TYPE_BYTE,- DataBuffer.TYPE_USHORT,- DataBuffer.TYPE_INT,- DataBuffer.TYPE_SHORT,- DataBuffer.TYPE_FLOAT, or- DataBuffer.TYPE_DOUBLE.
 
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isCompatibleRasterpublic boolean isCompatibleRaster(Raster raster) Returns true ifrasteris compatible with thisColorModel; false if it is not.- Overrides:
- isCompatibleRasterin class- ColorModel
- Parameters:
- raster- The- Rasterobject to test for compatibility.
- Returns:
- trueif- rasteris compatible with this- ColorModel,- falseif it is not.
 
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createCompatibleWritableRasterpublic WritableRaster createCompatibleWritableRaster(int w, int h) Creates aWritableRasterwith the specified width and height, that has a data layout (SampleModel) compatible with thisColorModel.- Overrides:
- createCompatibleWritableRasterin class- ColorModel
- Parameters:
- w- The width of the- WritableRasteryou want to create.
- h- The height of the- WritableRasteryou want to create.
- Returns:
- A WritableRasterthat is compatible with thisColorModel.
- See Also:
- WritableRaster,- SampleModel
 
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createCompatibleSampleModelpublic SampleModel createCompatibleSampleModel(int w, int h) Creates aSampleModelwith the specified width and height, that has a data layout compatible with thisColorModel.- Overrides:
- createCompatibleSampleModelin class- ColorModel
- Parameters:
- w- The width of the- SampleModelyou want to create.
- h- The height of the- SampleModelyou want to create.
- Returns:
- A SampleModelthat is compatible with thisColorModel.
- See Also:
- SampleModel
 
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isCompatibleSampleModelpublic boolean isCompatibleSampleModel(SampleModel sm) Checks whether or not the specifiedSampleModelis compatible with thisColorModel.- Overrides:
- isCompatibleSampleModelin class- ColorModel
- Parameters:
- sm- The- SampleModelto test for compatibility.
- Returns:
- trueif the- SampleModelis compatible with this- ColorModel,- falseif it is not.
- See Also:
- SampleModel
 
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getAlphaRasterpublic WritableRaster getAlphaRaster(WritableRaster raster) Returns aRasterrepresenting the alpha channel of an image, extracted from the inputRaster. This method assumes thatRasterobjects associated with thisColorModelstore the alpha band, if present, as the last band of image data. Returns null if there is no separate spatial alpha channel associated with thisColorModel. This method creates a newRaster, but will share the data array.- Overrides:
- getAlphaRasterin class- ColorModel
- Parameters:
- raster- The- WritableRasterfrom which to extract the alpha channel.
- Returns:
- A WritableRastercontaining the image's alpha channel.
 
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equalspublic boolean equals(Object obj) Tests if the specifiedObjectis an instance ofComponentColorModeland equals thisComponentColorModel.- Overrides:
- equalsin class- ColorModel
- Parameters:
- obj- the- Objectto test for equality
- Returns:
- trueif the specified- Objectis an instance of- ComponentColorModeland equals this- ComponentColorModel;- falseotherwise.
- See Also:
- Object.hashCode(),- HashMap
 
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hashCodepublic int hashCode() Returns the hash code for this ComponentColorModel.- Overrides:
- hashCodein class- ColorModel
- Returns:
- a hash code for this ComponentColorModel.
- See Also:
- Object.equals(java.lang.Object),- System.identityHashCode(java.lang.Object)
 
 
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