org.apache.pdfbox.pdmodel.graphics.color.PDDeviceRGB Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of pdfbox Show documentation
Show all versions of pdfbox Show documentation
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 java.awt.Transparency;
import java.awt.color.ColorSpace;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.ComponentColorModel;
import java.awt.image.WritableRaster;
import java.io.IOException;
import org.apache.pdfbox.cos.COSName;
/**
* Colours in the DeviceRGB colour space are specified according to the additive
* RGB (red-green-blue) colour model.
*
* @author Ben Litchfield
* @author John Hewson
*/
public final class PDDeviceRGB extends PDDeviceColorSpace
{
/** This is the single instance of this class. */
public static final PDDeviceRGB INSTANCE = new PDDeviceRGB();
private final PDColor initialColor = new PDColor(new float[] { 0, 0, 0 }, this);
private volatile ColorSpace awtColorSpace;
private PDDeviceRGB()
{
}
/**
* Lazy setting of the AWT color space due to JDK race condition.
*/
private void init()
{
// no need to synchronize this check as it is atomic
if (awtColorSpace != null)
{
return;
}
synchronized (this)
{
// we might have been waiting for another thread, so check again
if (awtColorSpace != null)
{
return;
}
awtColorSpace = ColorSpace.getInstance(ColorSpace.CS_sRGB);
// there is a JVM bug which results in a CMMException which appears to be a race
// condition caused by lazy initialization of the color transform, so we perform
// an initial color conversion while we're still synchronized, see PDFBOX-2184
awtColorSpace.toRGB(new float[] { 0, 0, 0, 0 });
}
}
@Override
public String getName()
{
return COSName.DEVICERGB.getName();
}
/**
* @inheritDoc
*/
@Override
public int getNumberOfComponents()
{
return 3;
}
@Override
public float[] getDefaultDecode(int bitsPerComponent)
{
return new float[] { 0, 1, 0, 1, 0, 1 };
}
@Override
public PDColor getInitialColor()
{
return initialColor;
}
@Override
public float[] toRGB(float[] value)
{
init();
return awtColorSpace.toRGB(value);
}
@Override
public BufferedImage toRGBImage(WritableRaster raster) throws IOException
{
init();
ColorModel colorModel = new ComponentColorModel(awtColorSpace,
false, false, Transparency.OPAQUE, raster.getDataBuffer().getDataType());
return new BufferedImage(colorModel, raster, false, null);
}
}