| java.lang.Object
 java.awt.image.ColorModel
java.awt.image.PackedColorModel
All known Subclasses: java.awt.image.DirectColorModel,
| PackedColorModel | | abstract public class PackedColorModel extends ColorModel (Code) | | The PackedColorModel class is an abstract
ColorModel class that works with pixel values which represent
color and alpha information as separate samples and which pack all
samples for a single pixel into a single int, short, or byte quantity.
This class can be used with an arbitrary
ColorSpace . The number of
color samples in the pixel values must be the same as the number of color
components in the ColorSpace. There can be a single alpha
sample. The array length is always 1 for those methods that use a
primitive array pixel representation of type transferType.
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
ColorModel.getNumComponents getNumComponents - 1.
- The first
ColorModel.getNumColorComponents getNumColorComponents
indices refer to color samples.
- If an alpha sample is present, it corresponds the last index.
- The order of the color indices is specified
by the
ColorSpace. Typically, this reflects the name of
the color space type (for example, TYPE_RGB), index 0
corresponds to red, index 1 to green, and index 2 to blue.
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 PackedColorModel is typically used with image data
that uses masks to define packed samples. For example, a
PackedColorModel 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 is
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
that use this representation do not throw an
IllegalArgumentException due to an invalid pixel value.
A subclass of PackedColorModel is
DirectColorModel ,
which is similar to an X11 TrueColor visual.
See Also: DirectColorModel
See Also: SinglePixelPackedSampleModel
See Also: BufferedImage
version:
10 Feb 1997 |
| Constructor Summary | |
| public | PackedColorModel(ColorSpace space, int bits, int[] colorMaskArray, int alphaMask, boolean isAlphaPremultiplied, int trans, int transferType)
Constructs a PackedColorModel from a color mask array,
which specifies which bits in an int pixel representation
contain each of the color samples, and an alpha mask. | | public | PackedColorModel(ColorSpace space, int bits, int rmask, int gmask, int bmask, int amask, boolean isAlphaPremultiplied, int trans, int transferType)
Constructs a PackedColorModel from the specified
masks which indicate which bits in an int pixel
representation contain the alpha, red, green and blue color samples. |
| Method Summary | |
| public SampleModel | createCompatibleSampleModel(int w, int h)
Creates a SampleModel with the specified width and
height that has a data layout compatible with this
ColorModel. | | public boolean | equals(Object obj)
Tests if the specified Object is an instance
of PackedColorModel and equals this
PackedColorModel. | | public WritableRaster | getAlphaRaster(WritableRaster raster)
Returns a
WritableRaster representing the alpha channel of
an image, extracted from the input WritableRaster.
This method assumes that WritableRaster objects
associated with this ColorModel store the alpha band,
if present, as the last band of image data. | | final public int | getMask(int index)
Returns the mask indicating which bits in a pixel
contain the specified color/alpha sample. | | final public int[] | getMasks()
Returns a mask array indicating which bits in a pixel
contain the color and alpha samples. | | public boolean | isCompatibleSampleModel(SampleModel sm)
Checks if the specified SampleModel is compatible
with this ColorModel. |
| maskArray | | int[] maskArray(Code) | | |
| maskOffsets | | int[] maskOffsets(Code) | | |
| scaleFactors | | float[] scaleFactors(Code) | | |
| PackedColorModel | | public PackedColorModel(ColorSpace space, int bits, int[] colorMaskArray, int alphaMask, boolean isAlphaPremultiplied, int trans, int transferType)(Code) | | Constructs a PackedColorModel from a color mask array,
which specifies which bits in an int pixel representation
contain each of the color samples, and an alpha mask. Color
components are in the specified ColorSpace. The length of
colorMaskArray should be the number of components in
the ColorSpace. All of the bits in each mask
must be contiguous and fit in the specified number of least significant
bits of an int pixel representation. If the
alphaMask is 0, there is no alpha. If there is alpha,
the boolean isAlphaPremultiplied specifies
how to interpret color and alpha samples in pixel values. If the
boolean is true, color samples are assumed
to have been multiplied by the alpha sample. The transparency,
trans, specifies what alpha values can be represented
by this color model. The transfer type is the type of primitive
array used to represent pixel values.
Parameters:
space - the specified ColorSpace
Parameters:
bits - the number of bits in the pixel values
Parameters:
colorMaskArray - array that specifies the masks representingthe bits of the pixel values that represent the colorcomponents
Parameters:
alphaMask - specifies the mask representingthe bits of the pixel values that represent the alphacomponent
Parameters:
isAlphaPremultiplied - true if color samples arepremultiplied by the alpha sample; false otherwise
Parameters:
trans - specifies the alpha value that can be represented bythis color model
Parameters:
transferType - the type of array used to represent pixel values
throws:
IllegalArgumentException - if bits is less than1 or greater than 32 |
| PackedColorModel | | public PackedColorModel(ColorSpace space, int bits, int rmask, int gmask, int bmask, int amask, boolean isAlphaPremultiplied, int trans, int transferType)(Code) | | Constructs a PackedColorModel from the specified
masks which indicate which bits in an int pixel
representation contain the alpha, red, green and blue color samples.
Color components are in the specified ColorSpace, which
must be of type ColorSpace.TYPE_RGB. All of the bits in each
mask must be contiguous and fit in the specified number of
least significant bits of an int pixel representation. If
amask is 0, there is no alpha. If there is alpha,
the boolean isAlphaPremultiplied
specifies how to interpret color and alpha samples
in pixel values. If the boolean is true,
color samples are assumed to have been multiplied by the alpha sample.
The transparency, trans, specifies what alpha values
can be represented by this color model.
The transfer type is the type of primitive array used to represent
pixel values.
Parameters:
space - the specified ColorSpace
Parameters:
bits - the number of bits in the pixel values
Parameters:
rmask - specifies the mask representingthe bits of the pixel values that represent the redcolor component
Parameters:
gmask - specifies the mask representingthe bits of the pixel values that represent the green color component
Parameters:
bmask - specifies the mask representingthe bits of the pixel values that represent the blue color component
Parameters:
amask - specifies the mask representingthe bits of the pixel values that represent the alpha component
Parameters:
isAlphaPremultiplied - true if color samples arepremultiplied by the alpha sample; false otherwise
Parameters:
trans - specifies the alpha value that can be represented bythis color model
Parameters:
transferType - the type of array used to represent pixel values
throws:
IllegalArgumentException - if space is not aTYPE_RGB space
See Also: ColorSpace |
| createCompatibleSampleModel | | public SampleModel createCompatibleSampleModel(int w, int h)(Code) | | Creates a SampleModel with the specified width and
height that has a data layout compatible with this
ColorModel.
Parameters:
w - the width (in pixels) of the region of the image datadescribed
Parameters:
h - the height (in pixels) of the region of the image datadescribed the newly created SampleModel.
throws:
IllegalArgumentException - if w orh is not greater than 0
See Also: SampleModel |
| equals | | public boolean equals(Object obj)(Code) | | Tests if the specified Object is an instance
of PackedColorModel and equals this
PackedColorModel.
Parameters:
obj - the Object to test for equality true if the specified Objectis an instance of PackedColorModel and equals thisPackedColorModel; false otherwise. |
| getAlphaRaster | | public WritableRaster getAlphaRaster(WritableRaster raster)(Code) | | Returns a
WritableRaster representing the alpha channel of
an image, extracted from the input WritableRaster.
This method assumes that WritableRaster objects
associated with this ColorModel store the alpha band,
if present, as the last band of image data. Returns null
if there is no separate spatial alpha channel associated with this
ColorModel. This method creates a new
WritableRaster, but shares the data array.
Parameters:
raster - a WritableRaster containing an image a WritableRaster that represents the alphachannel of the image contained in raster. |
| getMask | | final public int getMask(int index)(Code) | | Returns the mask indicating which bits in a pixel
contain the specified color/alpha sample. For color
samples, index corresponds to the placement of color
sample names in the color space. Thus, an index
equal to 0 for a CMYK ColorSpace would correspond to
Cyan and an index equal to 1 would correspond to
Magenta. If there is alpha, the alpha index would be:
alphaIndex = numComponents() - 1;
Parameters:
index - the specified color or alpha sample the mask, which indicates which bits of the int pixel representation contain the color or alpha sample specifiedby index.
throws:
ArrayIndexOutOfBoundsException - if index isgreater than the number of components minus 1 in this PackedColorModel or if index isless than zero |
| getMasks | | final public int[] getMasks()(Code) | | Returns a mask array indicating which bits in a pixel
contain the color and alpha samples.
the mask array , which indicates which bits of the int pixelrepresentation contain the color or alpha samples. |
| isCompatibleSampleModel | | public boolean isCompatibleSampleModel(SampleModel sm)(Code) | | Checks if the specified SampleModel is compatible
with this ColorModel. If sm is
null, this method returns false.
Parameters:
sm - the specified SampleModel, or null true if the specified SampleModelis compatible with this ColorModel; false otherwise.
See Also: SampleModel
See Also: |
| Methods inherited from java.awt.image.ColorModel | public ColorModel coerceData(WritableRaster raster, boolean isAlphaPremultiplied)(Code)(Java Doc)
public SampleModel createCompatibleSampleModel(int w, int h)(Code)(Java Doc)
public WritableRaster createCompatibleWritableRaster(int w, int h)(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
public void finalize()(Code)(Java Doc)
abstract public int getAlpha(int pixel)(Code)(Java Doc)
public int getAlpha(Object inData)(Code)(Java Doc)
public WritableRaster getAlphaRaster(WritableRaster raster)(Code)(Java Doc)
abstract public int getBlue(int pixel)(Code)(Java Doc)
public int getBlue(Object inData)(Code)(Java Doc)
final public ColorSpace getColorSpace()(Code)(Java Doc)
public int getComponentSize(int componentIdx)(Code)(Java Doc)
public int[] getComponentSize()(Code)(Java Doc)
public int[] getComponents(int pixel, int[] components, int offset)(Code)(Java Doc)
public int[] getComponents(Object pixel, int[] components, int offset)(Code)(Java Doc)
public int getDataElement(int[] components, int offset)(Code)(Java Doc)
public int getDataElement(float[] normComponents, int normOffset)(Code)(Java Doc)
public Object getDataElements(int rgb, Object pixel)(Code)(Java Doc)
public Object getDataElements(int[] components, int offset, Object obj)(Code)(Java Doc)
public Object getDataElements(float[] normComponents, int normOffset, Object obj)(Code)(Java Doc)
static int getDefaultTransferType(int pixel_bits)(Code)(Java Doc)
static byte[] getGray16TosRGB8LUT(ICC_ColorSpace grayCS)(Code)(Java Doc)
static byte[] getGray8TosRGB8LUT(ICC_ColorSpace grayCS)(Code)(Java Doc)
abstract public int getGreen(int pixel)(Code)(Java Doc)
public int getGreen(Object inData)(Code)(Java Doc)
static short[] getLinearGray16ToOtherGray16LUT(ICC_ColorSpace grayCS)(Code)(Java Doc)
static byte[] getLinearGray16ToOtherGray8LUT(ICC_ColorSpace grayCS)(Code)(Java Doc)
static byte[] getLinearRGB16TosRGB8LUT()(Code)(Java Doc)
static byte[] getLinearRGB8TosRGB8LUT()(Code)(Java Doc)
public float[] getNormalizedComponents(int[] components, int offset, float[] normComponents, int normOffset)(Code)(Java Doc)
public float[] getNormalizedComponents(Object pixel, float[] normComponents, int normOffset)(Code)(Java Doc)
public int getNumColorComponents()(Code)(Java Doc)
public int getNumComponents()(Code)(Java Doc)
public int getPixelSize()(Code)(Java Doc)
public int getRGB(int pixel)(Code)(Java Doc)
public int getRGB(Object inData)(Code)(Java Doc)
public static ColorModel getRGBdefault()(Code)(Java Doc)
abstract public int getRed(int pixel)(Code)(Java Doc)
public int getRed(Object inData)(Code)(Java Doc)
final public int getTransferType()(Code)(Java Doc)
public int getTransparency()(Code)(Java Doc)
public int[] getUnnormalizedComponents(float[] normComponents, int normOffset, int[] components, int offset)(Code)(Java Doc)
static short[] getsRGB8ToLinearRGB16LUT()(Code)(Java Doc)
static byte[] getsRGB8ToLinearRGB8LUT()(Code)(Java Doc)
final public boolean hasAlpha()(Code)(Java Doc)
public int hashCode()(Code)(Java Doc)
final public boolean isAlphaPremultiplied()(Code)(Java Doc)
public boolean isCompatibleRaster(Raster raster)(Code)(Java Doc)
public boolean isCompatibleSampleModel(SampleModel sm)(Code)(Java Doc)
static boolean isLinearGRAYspace(ColorSpace cs)(Code)(Java Doc)
static boolean isLinearRGBspace(ColorSpace cs)(Code)(Java Doc)
static void loadLibraries()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
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