org.apache.pdfbox.pdmodel.graphics.color.PDDeviceRGB Maven / Gradle / Ivy
/*
* 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);
}
}