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The Apache PDFBox library is an open source Java tool for working with PDF documents.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.pdfbox.pdmodel.graphics.color;
import org.apache.pdfbox.cos.COSBase;
import java.awt.color.ColorSpace;
import java.awt.image.BufferedImage;
import java.awt.image.WritableRaster;
import java.io.IOException;
/**
* A color space embedded in a JPX file.
* This wraps the AWT ColorSpace which is obtained after JAI Image I/O reads a JPX stream.
*
* @author John Hewson
*/
public final class PDJPXColorSpace extends PDColorSpace
{
private final ColorSpace awtColorSpace;
/**
* Creates a new JPX color space from the given AWT color space.
* @param colorSpace AWT color space from a JPX image
*/
public PDJPXColorSpace(ColorSpace colorSpace)
{
this.awtColorSpace = colorSpace;
}
@Override
public String getName()
{
return "JPX";
}
@Override
public int getNumberOfComponents()
{
return awtColorSpace.getNumComponents();
}
@Override
public float[] getDefaultDecode(int bitsPerComponent)
{
int n = getNumberOfComponents();
float[] decode = new float[n * 2];
for (int i = 0; i < n; i++)
{
decode[i * 2] = awtColorSpace.getMinValue(i);
decode[i * 2 + 1] = awtColorSpace.getMaxValue(i);
}
return decode;
}
@Override
public PDColor getInitialColor()
{
throw new UnsupportedOperationException("JPX color spaces don't support drawing");
}
@Override
public float[] toRGB(float[] value)
{
throw new UnsupportedOperationException("JPX color spaces don't support drawing");
}
@Override
public BufferedImage toRGBImage(WritableRaster raster) throws IOException
{
return toRGBImageAWT(raster, awtColorSpace);
}
@Override
public COSBase getCOSObject()
{
throw new UnsupportedOperationException("JPX color spaces don't have COS objects");
}
}