/*
* 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.net.URL;
import org.apache.pdfbox.cos.COSName;
import java.awt.color.ICC_ColorSpace;
import java.awt.color.ICC_Profile;
import java.awt.image.BufferedImage;
import java.awt.image.WritableRaster;
import java.io.IOException;
import java.io.InputStream;
/**
* Allows colors to be specified according to the subtractive CMYK (cyan, magenta, yellow, black)
* model typical of printers and other paper-based output devices.
*
* @author John Hewson
* @author Ben Litchfield
*/
public class PDDeviceCMYK extends PDDeviceColorSpace
{
/** The single instance of this class. */
public static PDDeviceCMYK INSTANCE;
static
{
try
{
INSTANCE = new PDDeviceCMYK();
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
private final PDColor initialColor = new PDColor(new float[] { 0, 0, 0, 1 }, this);
private final ICC_ColorSpace awtColorSpace;
protected PDDeviceCMYK() throws IOException
{
// loads the ICC color profile for CMYK
ICC_Profile iccProfile = getICCProfile();
if (iccProfile == null)
{
throw new IOException("Default CMYK color profile could not be loaded");
}
awtColorSpace = new ICC_ColorSpace(iccProfile);
// 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 in a static context, see PDFBOX-2184
awtColorSpace.toRGB(new float[] { 0, 0, 0, 0 });
}
protected ICC_Profile getICCProfile() throws IOException
{
// Adobe Acrobat uses "U.S. Web Coated (SWOP) v2" as the default
// CMYK profile, however it is not available under an open license.
// Instead, the "ISO Coated v2 300% (basICColor)" is used, which
// is an open alternative to the "ISO Coated v2 300% (ECI)" profile.
String name = "org/apache/pdfbox/resources/icc/ISOcoated_v2_300_bas.icc";
URL url = PDDeviceCMYK.class.getClassLoader().getResource(name);
if (url == null)
{
throw new IOException("Error loading resource: " + name);
}
InputStream input = url.openStream();
ICC_Profile iccProfile = ICC_Profile.getInstance(input);
input.close();
return iccProfile;
}
@Override
public String getName()
{
return COSName.DEVICECMYK.getName();
}
@Override
public int getNumberOfComponents()
{
return 4;
}
@Override
public float[] getDefaultDecode(int bitsPerComponent)
{
return new float[] { 0, 1, 0, 1, 0, 1, 0, 1 };
}
@Override
public PDColor getInitialColor()
{
return initialColor;
}
@Override
public float[] toRGB(float[] value)
{
return awtColorSpace.toRGB(value);
}
@Override
public BufferedImage toRGBImage(WritableRaster raster) throws IOException
{
return toRGBImageAWT(raster, awtColorSpace);
}
}