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- /*
- * 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.
- */
-
- /* $Id$ */
-
- 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;
- }
-
- }
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