org.apache.fop.pdf.PDFDeviceColorSpace 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.
*/
/* $Id: PDFDeviceColorSpace.java 1069439 2011-02-10 15:58:57Z jeremias $ */
package org.apache.fop.pdf;
import java.awt.color.ColorSpace;
/**
* Represents a device-specific color space. Used for mapping DeviceRGB, DeviceCMYK and DeviceGray.
*/
public class PDFDeviceColorSpace implements PDFColorSpace {
private int numComponents;
/**
* Unknown colorspace
*/
public static final int DEVICE_UNKNOWN = -1;
/**
* Gray colorspace
*/
public static final int DEVICE_GRAY = 1;
/**
* RGB colorspace
*/
public static final int DEVICE_RGB = 2;
/**
* CMYK colorspace
*/
public static final int DEVICE_CMYK = 3;
// Are there any others?
/**
* Current color space value.
*/
protected int currentColorSpace = DEVICE_UNKNOWN;
/**
* Create a PDF colorspace object.
*
* @param theColorSpace the current colorspace
*/
public PDFDeviceColorSpace(int theColorSpace) {
this.currentColorSpace = theColorSpace;
numComponents = calculateNumComponents();
}
private int calculateNumComponents() {
if (currentColorSpace == DEVICE_GRAY) {
return 1;
} else if (currentColorSpace == DEVICE_RGB) {
return 3;
} else if (currentColorSpace == DEVICE_CMYK) {
return 4;
} else {
return 0;
}
}
/**
* Set the current colorspace.
*
* @param theColorSpace the new color space value
*/
public void setColorSpace(int theColorSpace) {
this.currentColorSpace = theColorSpace;
numComponents = calculateNumComponents();
}
/**
* Get the colorspace value
*
* @return the colorspace value
*/
public int getColorSpace() {
return (this.currentColorSpace);
}
/**
* Get the number of color components for this colorspace
*
* @return the number of components
*/
public int getNumComponents() {
return numComponents;
}
/** @return the name of the color space */
public String getName() {
switch (currentColorSpace) {
case DEVICE_CMYK:
return "DeviceCMYK";
case DEVICE_GRAY:
return "DeviceGray";
case DEVICE_RGB:
return "DeviceRGB";
default:
throw new IllegalStateException("Unsupported color space in use.");
}
}
/** {@inheritDoc} */
public boolean isDeviceColorSpace() {
return true;
}
/** {@inheritDoc} */
public boolean isRGBColorSpace() {
return getColorSpace() == DEVICE_RGB;
}
/** {@inheritDoc} */
public boolean isCMYKColorSpace() {
return getColorSpace() == DEVICE_CMYK;
}
/** {@inheritDoc} */
public boolean isGrayColorSpace() {
return getColorSpace() == DEVICE_GRAY;
}
/**
* Returns a suitable {@link PDFDeviceColorSpace} object given a {@link ColorSpace} object.
* @param cs ColorSpace instance
* @return a PDF-based color space
*/
public static PDFDeviceColorSpace toPDFColorSpace(ColorSpace cs) {
if (cs == null) {
return null;
}
PDFDeviceColorSpace pdfCS = new PDFDeviceColorSpace(0);
switch (cs.getType()) {
case ColorSpace.TYPE_CMYK:
pdfCS.setColorSpace(PDFDeviceColorSpace.DEVICE_CMYK);
break;
case ColorSpace.TYPE_GRAY:
pdfCS.setColorSpace(PDFDeviceColorSpace.DEVICE_GRAY);
break;
default:
pdfCS.setColorSpace(PDFDeviceColorSpace.DEVICE_RGB);
}
return pdfCS;
}
}