/*
* 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.
*/
/* $Id: PDFICCBasedColorSpace.java 627367 2008-02-13 12:03:30Z maxberger $ */
package org.apache.fop.pdf;
import java.awt.color.ColorSpace;
import java.awt.color.ICC_Profile;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.io.IOUtils;
/**
* Represents an ICCBased color space in PDF.
*/
public class PDFICCBasedColorSpace extends PDFObject implements PDFColorSpace {
private PDFICCStream iccStream;
private String explicitName;
/**
* Constructs a the ICCBased color space with an explicit name (ex. "DefaultRGB").
* @param explicitName an explicit name or null if a name should be generated
* @param iccStream the ICC stream to associate with this color space
*/
public PDFICCBasedColorSpace(String explicitName, PDFICCStream iccStream) {
this.explicitName = explicitName;
this.iccStream = iccStream;
}
/**
* Constructs a the ICCBased color space.
* @param iccStream the ICC stream to associate with this color space
*/
public PDFICCBasedColorSpace(PDFICCStream iccStream) {
this(null, iccStream);
}
/** @return the ICC stream associated with this color space */
public PDFICCStream getICCStream() {
return this.iccStream;
}
/** {@inheritDoc} */
public int getNumComponents() {
return iccStream.getICCProfile().getNumComponents();
}
/** {@inheritDoc} */
public String getName() {
if (explicitName != null) {
return explicitName;
} else {
return "ICC" + iccStream.getObjectNumber();
}
}
/** {@inheritDoc} */
public boolean isDeviceColorSpace() {
return false;
}
/** {@inheritDoc} */
public boolean isRGBColorSpace() {
return getNumComponents() == 3;
}
/** {@inheritDoc} */
public boolean isCMYKColorSpace() {
return getNumComponents() == 4;
}
/** {@inheritDoc} */
public boolean isGrayColorSpace() {
return getNumComponents() == 1;
}
/** {@inheritDoc} */
protected String toPDFString() {
StringBuffer sb = new StringBuffer(64);
sb.append(getObjectID());
sb.append("[/ICCBased ").append(getICCStream().referencePDF()).append("]");
sb.append("\nendobj\n");
return sb.toString();
}
/**
* Sets sRGB as the DefaultRGB color space in the PDF document.
* @param pdfDoc the PDF document
* @return the newly installed color space object
*/
public static PDFICCBasedColorSpace setupsRGBAsDefaultRGBColorSpace(PDFDocument pdfDoc) {
PDFICCStream sRGBProfile = setupsRGBColorProfile(pdfDoc);
//Map sRGB as default RGB profile for DeviceRGB
return pdfDoc.getFactory().makeICCBasedColorSpace(null, "DefaultRGB", sRGBProfile);
}
/**
* Installs the sRGB color space in the PDF document.
* @param pdfDoc the PDF document
* @return the newly installed color space object
*/
public static PDFICCBasedColorSpace setupsRGBColorSpace(PDFDocument pdfDoc) {
PDFICCStream sRGBProfile = setupsRGBColorProfile(pdfDoc);
//Map sRGB as default RGB profile for DeviceRGB
return pdfDoc.getFactory().makeICCBasedColorSpace(null, null, sRGBProfile);
}
/**
* Sets up the sRGB color profile in the PDF document. It does so by trying to
* install a very small ICC profile (~4KB) instead of the very big one (~140KB)
* the Sun JVM uses.
* @param pdfDoc the PDF document
* @return the ICC stream with the sRGB profile
*/
public static PDFICCStream setupsRGBColorProfile(PDFDocument pdfDoc) {
ICC_Profile profile;
PDFICCStream sRGBProfile = pdfDoc.getFactory().makePDFICCStream();
InputStream in = PDFDocument.class.getResourceAsStream("sRGB Color Space Profile.icm");
if (in != null) {
try {
profile = ICC_Profile.getInstance(in);
} catch (IOException ioe) {
throw new RuntimeException(
"Unexpected IOException loading the sRGB profile: " + ioe.getMessage());
} finally {
IOUtils.closeQuietly(in);
}
} else {
// Fallback: Use the sRGB profile from the JRE (about 140KB)
profile = ICC_Profile.getInstance(ColorSpace.CS_sRGB);
}
sRGBProfile.setColorSpace(profile, null);
return sRGBProfile;
}
}