org.jaitools.media.jai.rangelookup.RangeLookupRIF Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jt-all Show documentation
Show all versions of jt-all Show documentation
Provides a single jar containing all JAITools modules which you can
use instead of including individual modules in your project. Note:
It does not include the Jiffle scripting language or Jiffle image
operator.
/*
* Copyright (c) 2009, Michael Bedward. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.jaitools.media.jai.rangelookup;
import java.awt.RenderingHints;
import java.awt.image.ColorModel;
import java.awt.image.DataBuffer;
import java.awt.image.RenderedImage;
import java.awt.image.SampleModel;
import java.awt.image.renderable.ParameterBlock;
import java.awt.image.renderable.RenderedImageFactory;
import java.util.List;
import javax.media.jai.BorderExtender;
import javax.media.jai.ImageLayout;
import javax.media.jai.RasterFactory;
import com.sun.media.jai.opimage.RIFUtil;
import com.sun.media.jai.util.JDKWorkarounds;
import org.jaitools.imageutils.ImageDataType;
/**
* The image factory for the RangeLookup operation.
*
* @see RangeLookupDescriptor
*
* @author Michael Bedward
* @author Simone Giannecchini, GeoSolutions
* @since 1.0
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
public class RangeLookupRIF implements RenderedImageFactory {
public RangeLookupRIF() {
}
/**
* Create a new instance of RangeLookupOpImage in the rendered layer.
*
* @param paramBlock an instance of ParameterBlock
* @param renderHints useful to specify a {@link BorderExtender} and
* {@link ImageLayout}
*/
public RenderedImage create(ParameterBlock paramBlock,
RenderingHints renderHints) {
final RenderedImage src = paramBlock.getRenderedSource(0);
ImageLayout layout = RIFUtil.getImageLayoutHint(renderHints);
final RangeLookupTable table =
(RangeLookupTable) paramBlock.getObjectParameter(RangeLookupDescriptor.TABLE_ARG);
/*
* Default value may be null, indicating unmatched source values
* should be passed through.
*/
final Number defaultValue =
(Number) paramBlock.getObjectParameter(RangeLookupDescriptor.DEFAULT_ARG);
/*
* Set the destination type based on the
* type and range of lookup table return values.
*/
final Class destClazz;
List items = table.getItems();
if (items.size() > 0) {
destClazz = items.get(0).getValue().getClass();
} else if (defaultValue != null) {
destClazz = defaultValue.getClass();
} else {
// fall back to source value class
int typeCode = paramBlock.getRenderedSource(0).getSampleModel().getDataType();
ImageDataType dataType = ImageDataType.getForDataBufferType(typeCode);
destClazz = dataType.getDataClass();
}
int dataType = -1;
if (destClazz.equals(Short.class)) {
// if the values are positive we should go with USHORT
for (int i = items.size() - 1; i >= 0; i--) {
if (items.get(i).getValue().shortValue() < 0) {
dataType = DataBuffer.TYPE_SHORT;
break;
}
}
// No negative values so USHORT can be used
if (dataType == -1) {
dataType = DataBuffer.TYPE_USHORT;
}
} else { // All data classes other than Short
try {
ImageDataType t = ImageDataType.getForClass(destClazz);
dataType = t.getDataBufferType();
} catch (IllegalArgumentException ex) {
throw new IllegalArgumentException(
"Illegal destination class for this rangelookuptable:"
+ destClazz.toString());
}
}
final boolean isDataTypeChanged;
if (src.getSampleModel().getDataType() != dataType) {
isDataTypeChanged = true;
} else {
isDataTypeChanged = false;
}
if (isDataTypeChanged) {
// Create or clone the ImageLayout.
if (layout == null) {
layout = new ImageLayout(src);
} else {
layout = (ImageLayout) layout.clone();
}
// Get prospective destination SampleModel.
SampleModel sampleModel = layout.getSampleModel(src);
// Create a new SampleModel
int tileWidth = layout.getTileWidth(src);
int tileHeight = layout.getTileHeight(src);
int numBands = src.getSampleModel().getNumBands();
SampleModel csm =
RasterFactory.createComponentSampleModel(sampleModel,
dataType,
tileWidth,
tileHeight,
numBands);
layout.setSampleModel(csm);
// Check ColorModel.
ColorModel colorModel = layout.getColorModel(null);
if (colorModel != null
&& !JDKWorkarounds.areCompatibleDataModels(layout.getSampleModel(null),
colorModel)) {
// Clear the mask bit if incompatible.
layout.unsetValid(ImageLayout.COLOR_MODEL_MASK);
}
}
return new RangeLookupOpImage(src,
renderHints,
layout,
table,
defaultValue);
}
}