Package org.apache.sis.internal.coverage.j2d

Class ScaledColorModel

java.lang.Object

java.awt.image.ColorModel

java.awt.image.ComponentColorModel

org.apache.sis.internal.coverage.j2d.ScaledColorModel

All Implemented Interfaces:

Transparency

final class ScaledColorModel
extends ComponentColorModel

A color model for use with ScaledColorSpace (gray scale image with missing values). This color model is slightly more efficient than the default ComponentColorModel by reducing the amount of object allocations, made possible by the knowledge that we use only one sample value and returns only one color component (the gray). In addition, this class renders the Float.NaN values as transparent.

Since:

1.1

Version:

1.1

Field Summary

Fields

Modifier and Type	Field	Description
private final ScaledColorSpace	cs	The object from which to get the coefficients for converting values to colors.
private static final int	MASK	The mask to apply for getting a single color component.
(package private) static final int	RANGE	Size of the range of color values.

Fields inherited from class java.awt.image.ColorModel

pixel_bits, transferType

Fields inherited from interface java.awt.Transparency

BITMASK, OPAQUE, TRANSLUCENT

Constructor Summary

Constructors

Constructor	Description
ScaledColorModel(ScaledColorSpace colorSpace, int type)	Creates a new color model for the range of values in the given color space.

Method Summary

Modifier and Type	Method	Description
(package private) final ScaledColorModel	createSubsetColorModel(int[] bands)	Creates a new color model with only a subset of the bands in this color model.
boolean	equals(Object obj)	Returns true if the given object is also an instance of ScaledColorModel with equals color space and same transfer type.
int	getAlpha(int value)
int	getAlpha(Object inData)	Returns the alpha value for the given sample values.
int	getBlue(int value)
int	getBlue(Object value)
int	getGreen(int value)
int	getGreen(Object value)
int	getRed(int value)	Defined for consistency but should not be used.
int	getRed(Object value)
int	getRGB(int value)	Returns the color/alpha components of the pixel.
int	getRGB(Object inData)	Returns the color/alpha components for the specified pixel in the default RGB color model format.
int	getTransparency()	Returns whether this color model is capable to handle transparent pixels.

Methods inherited from class java.awt.image.ComponentColorModel

coerceData, createCompatibleSampleModel, createCompatibleWritableRaster, getAlphaRaster, getComponents, getComponents, getDataElement, getDataElement, getDataElements, getDataElements, getDataElements, getNormalizedComponents, getNormalizedComponents, getUnnormalizedComponents, isCompatibleRaster, isCompatibleSampleModel

Methods inherited from class java.awt.image.ColorModel

finalize, getColorSpace, getComponentSize, getComponentSize, getNumColorComponents, getNumComponents, getPixelSize, getRGBdefault, getTransferType, hasAlpha, hashCode, isAlphaPremultiplied, toString

Methods inherited from class java.lang.Object

clone, getClass, notify, notifyAll, wait, wait, wait

Field Details

MASK

private static final int MASK

The mask to apply for getting a single color component. This is also the maximum (inclusive) color/alpha value.

See Also:

• Constant Field Values

RANGE

static final int RANGE

Size of the range of color values. Since minimum value is zero, this range is also the maximum (exclusive) color/alpha value.

See Also:

• Constant Field Values

cs

private final ScaledColorSpace cs

The object from which to get the coefficients for converting values to colors. This is a reference to the same object than ColorModel.getColorSpace(), but stored as a ScaledColorSpace for avoiding the need to perform casts.

Constructor Details

ScaledColorModel

ScaledColorModel(ScaledColorSpace colorSpace,
 int type)

Creates a new color model for the range of values in the given color space.

Parameters:

colorSpace - the color space to use with this color model.

type - one of the DataBuffer constants.

Method Details

createSubsetColorModel

final ScaledColorModel createSubsetColorModel(int[] bands)

Creates a new color model with only a subset of the bands in this color model.

getRed

public int getRed(int value)

Defined for consistency but should not be used.

Overrides:

getRed in class ComponentColorModel

getRed

public int getRed(Object value)

Overrides:

getRed in class ComponentColorModel

getGreen

public int getGreen(int value)

Overrides:

getGreen in class ComponentColorModel

getGreen

public int getGreen(Object value)

Overrides:

getGreen in class ComponentColorModel

getBlue

public int getBlue(int value)

Overrides:

getBlue in class ComponentColorModel

getBlue

public int getBlue(Object value)

Overrides:

getBlue in class ComponentColorModel

getAlpha

public int getAlpha(int value)

Overrides:

getAlpha in class ComponentColorModel

getTransparency

public int getTransparency()

Returns whether this color model is capable to handle transparent pixels.

Specified by:

getTransparency in interface Transparency

Overrides:

getTransparency in class ColorModel

getAlpha

public int getAlpha(Object inData)

Returns the alpha value for the given sample values. This is based only on whether or not the value is NaN.

Overrides:

getAlpha in class ComponentColorModel

getRGB

public int getRGB(Object inData)

Returns the color/alpha components for the specified pixel in the default RGB color model format.

Overrides:

getRGB in class ComponentColorModel

getRGB

public int getRGB(int value)

Returns the color/alpha components of the pixel.

Overrides:

getRGB in class ComponentColorModel

equals

public boolean equals(Object obj)

Returns true if the given object is also an instance of ScaledColorModel with equals color space and same transfer type.

Note: we have to override this method because the ComponentColorModel.equals(Object) implementation is confused by our overriding of getTransparency() method. However, we do not need to override ColorModel.hashCode().

Overrides:

equals in class ComponentColorModel