Package org.geotools.image.util

Class ComponentColorModelJAI

Object

ColorModel

ComponentColorModel

ComponentColorModelJAI

All Implemented Interfaces:

Transparency

public class ComponentColorModelJAI
extends ComponentColorModel

A ComponentColorModel modified for interoperability with Java Advanced Imaging. JAI 1.1 was designed for use with J2SE 1.3 and is not aware of new features in J2SE 1.4. This leads to the following problems:

• ComponentColorModel supports float and double datatypes since J2SE 1.4 only. The workaround for J2SE 1.3 is to use the FloatDoubleColorModel provided with JAI 1.1.
• FloatDoubleColorModel ignores the new API in ColorSpace, especially the getMinValue and getMaxValue methods. Consequently, rendering of any image using our custom ScaledColorSpace is wrong.
• ComponentColorModel uses DataBufferFloat and DataBufferDouble, which are unknown to JAI 1.1. Consequently, trying to use RectIter with one of those will throw ClassCastException.

The work around is to use J2SE's ComponentColorModel (which work with our custom ColorSpace) and override its createCompatibleSampleModel in order to returns ComponentSampleModelJAI instead of ComponentSampleModel when float or double datatype is requested.

Since:

2.0

Author:

Martin Desruisseaux (IRD)

Field Summary

Fields

Modifier and Type	Field	Description
static boolean	ENABLED	Whatever usage of this class should be enabled or not.

Fields inherited from class ColorModel

pixel_bits, transferType

Fields inherited from interface Transparency

BITMASK, OPAQUE, TRANSLUCENT

Constructor Summary

Constructors

Constructor	Description
ComponentColorModelJAI(ColorSpace colorSpace, boolean hasAlpha, boolean isAlphaPremultiplied, int transparency, int transferType)	Construct a new color model.
ComponentColorModelJAI(ColorSpace colorSpace, int[] bits, boolean hasAlpha, boolean isAlphaPremultiplied, int transparency, int transferType)	Construct a new color model.

Method Summary

Modifier and Type	Method	Description
SampleModel	createCompatibleSampleModel(int w, int h)	Returns a compatible sample model.
String	toString()	Returns the String representation of the contents of this ColorModelobject.

Methods inherited from class ComponentColorModel

coerceData, createCompatibleWritableRaster, equals, getAlpha, getAlpha, getAlphaRaster, getBlue, getBlue, getComponents, getComponents, getDataElement, getDataElement, getDataElements, getDataElements, getDataElements, getGreen, getGreen, getNormalizedComponents, getNormalizedComponents, getRed, getRed, getRGB, getRGB, getUnnormalizedComponents, hashCode, isCompatibleRaster, isCompatibleSampleModel

Methods inherited from class ColorModel

finalize, getColorSpace, getComponentSize, getComponentSize, getNumColorComponents, getNumComponents, getPixelSize, getRGBdefault, getTransferType, getTransparency, hasAlpha, isAlphaPremultiplied

Methods inherited from class Object

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

Field Detail

ENABLED

public static final boolean ENABLED

Whatever usage of this class should be enabled or not.

See Also:

Constant Field Values

Constructor Detail

ComponentColorModelJAI

public ComponentColorModelJAI(ColorSpace colorSpace,
                              int[] bits,
                              boolean hasAlpha,
                              boolean isAlphaPremultiplied,
                              int transparency,
                              int transferType)

Construct a new color model.

ComponentColorModelJAI

public ComponentColorModelJAI(ColorSpace colorSpace,
                              boolean hasAlpha,
                              boolean isAlphaPremultiplied,
                              int transparency,
                              int transferType)

Construct a new color model.

Method Detail

createCompatibleSampleModel

public SampleModel createCompatibleSampleModel(int w,
                                               int h)

Returns a compatible sample model. This implementation is nearly identical to default J2SE's implementation, except that it construct a JAI color model instead of a J2SE one.

Overrides:

createCompatibleSampleModel in class ComponentColorModel

toString

public String toString()

Returns the String representation of the contents of this ColorModelobject.

Overrides:

toString in class ColorModel

Returns:

a String representing the contents of this ColorModel object.