org.geotools.resources.image
Class ComponentColorModelJAI

java.lang.Object
  java.awt.image.ColorModel
      java.awt.image.ComponentColorModel
          org.geotools.resources.image.ComponentColorModelJAI

All Implemented Interfaces:

java.awt.Transparency

public class ComponentColorModelJAI

extends java.awt.image.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 lead to the following problems:

• ComponentColorModel support and datatypes since J2SE 1.4 only. The workaround for J2SE 1.3 is to use the FloatDoubleColorModel provided with JAI 1.1.
• FloatDoubleColorModel ignore the new API in ColorSpace, especially the and methods. Consequently, rendering of any image using our custom 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 it to use J2SE's ComponentColorModel (which work with our custom ColorSpace) and override its in order to returns ComponentSampleModelJAI instead of ComponentSampleModel when or datatype is requested.

Since:

2.0

Version:

$Id: ComponentColorModelJAI.java 17672 2006-01-19 00:25:55Z desruisseaux $

Author:

Martin Desruisseaux

To Do:

Remove this patch when JAI will recognize J2SE 1.4 classes.

Field Summary

Fields inherited from class java.awt.image.ColorModel

pixel_bits, transferType

Fields inherited from interface java.awt.Transparency

BITMASK, OPAQUE, TRANSLUCENT

Constructor Summary

ComponentColorModelJAI(java.awt.color.ColorSpace colorSpace, boolean hasAlpha, boolean isAlphaPremultiplied, int transparency, int transferType)
Construct a new color model.

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

Method Summary

java.awt.image.SampleModel	createCompatibleSampleModel(int w, int h) Returns a compatible sample model.
java.lang.String	toString() Returns the representation of the contents of this object.

Methods inherited from class java.awt.image.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, isCompatibleRaster, isCompatibleSampleModel

Methods inherited from class java.awt.image.ColorModel

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ComponentColorModelJAI

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

Construct a new color model.

ComponentColorModelJAI

public ComponentColorModelJAI(java.awt.color.ColorSpace colorSpace,
                              boolean hasAlpha,
                              boolean isAlphaPremultiplied,
                              int transparency,
                              int transferType)

Construct a new color model.

Method Detail

createCompatibleSampleModel

public java.awt.image.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.

toString

public java.lang.String toString()

Returns the representation of the contents of this object.

Returns:

a representing the contents of this object.