src/main/java/org/apache/commons/imaging/formats/icns/IcnsImageParser.java - commons-imaging - Git at Google

 /*
  * 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.commons.imaging.formats.icns;

 import java.awt.Dimension;
 import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.PrintWriter;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;

 import org.apache.commons.imaging.ImageFormat;
 import org.apache.commons.imaging.ImageFormats;
 import org.apache.commons.imaging.ImageInfo;
 import org.apache.commons.imaging.ImageParser;
 import org.apache.commons.imaging.ImageReadException;
 import org.apache.commons.imaging.ImageWriteException;
 import org.apache.commons.imaging.common.BinaryOutputStream;
 import org.apache.commons.imaging.common.ByteOrder;
 import org.apache.commons.imaging.common.IImageMetadata;
 import org.apache.commons.imaging.common.bytesource.ByteSource;
 import org.apache.commons.imaging.util.IoUtils;
 import org.apache.commons.imaging.util.ParamMap;

 public class IcnsImageParser extends ImageParser {
     public static final int ICNS_MAGIC = IcnsType.typeAsInt("icns");

     public IcnsImageParser() {
         super.setByteOrder(ByteOrder.BIG_ENDIAN);
     }

     @Override
     public String getName() {
         return "icns-Custom";
     }

     @Override
     public String getDefaultExtension() {
         return DEFAULT_EXTENSION;
     }

     private static final String DEFAULT_EXTENSION = ".icns";

     private static final String ACCEPTED_EXTENSIONS[] = { ".icns", };

     @Override
     protected String[] getAcceptedExtensions() {
         return ACCEPTED_EXTENSIONS;
     }

     @Override
     protected ImageFormat[] getAcceptedTypes() {
         return new ImageFormat[] { ImageFormats.ICNS };
     }

     @Override
     public boolean embedICCProfile(final File src, final File dst, final byte profile[]) {
         return false;
     }

     @Override
     public IImageMetadata getMetadata(final ByteSource byteSource, final Map<String,Object> params)
             throws ImageReadException, IOException {
         return null;
     }

     @Override
     public ImageInfo getImageInfo(final ByteSource byteSource, Map<String,Object> params)
             throws ImageReadException, IOException {
         // make copy of params; we'll clear keys as we consume them.
         params = (params == null) ? new HashMap<String,Object>() : new HashMap<String,Object>(params);

         ParamMap.getParamBoolean(params, PARAM_KEY_VERBOSE, false);

         if (params.containsKey(PARAM_KEY_VERBOSE)) {
             params.remove(PARAM_KEY_VERBOSE);
         }

         if (params.size() > 0) {
             final Object firstKey = params.keySet().iterator().next();
             throw new ImageReadException("Unknown parameter: " + firstKey);
         }

         final IcnsContents contents = readImage(byteSource);
         final List<BufferedImage> images = IcnsDecoder
                 .decodeAllImages(contents.icnsElements);
         if (images.isEmpty()) {
             throw new ImageReadException("No icons in ICNS file");
         }
         final BufferedImage image0 = images.get(0);
         return new ImageInfo("Icns", 32, new ArrayList<String>(),
                 ImageFormats.ICNS, "ICNS Apple Icon Image",
                 image0.getHeight(), "image/x-icns", images.size(), 0, 0, 0, 0,
                 image0.getWidth(), false, true, false,
                 ImageInfo.COLOR_TYPE_RGB,
                 ImageInfo.COMPRESSION_ALGORITHM_UNKNOWN);
     }

     @Override
     public Dimension getImageSize(final ByteSource byteSource, Map<String,Object> params)
             throws ImageReadException, IOException {
         // make copy of params; we'll clear keys as we consume them.
         params = (params == null) ? new HashMap<String,Object>() : new HashMap<String,Object>(params);

         ParamMap.getParamBoolean(params, PARAM_KEY_VERBOSE, false);

         if (params.containsKey(PARAM_KEY_VERBOSE)) {
             params.remove(PARAM_KEY_VERBOSE);
         }

         if (params.size() > 0) {
             final Object firstKey = params.keySet().iterator().next();
             throw new ImageReadException("Unknown parameter: " + firstKey);
         }

         final IcnsContents contents = readImage(byteSource);
         final List<BufferedImage> images = IcnsDecoder
                 .decodeAllImages(contents.icnsElements);
         if (images.isEmpty()) {
             throw new ImageReadException("No icons in ICNS file");
         }
         final BufferedImage image0 = images.get(0);
         return new Dimension(image0.getWidth(), image0.getHeight());
     }

     @Override
     public byte[] getICCProfileBytes(final ByteSource byteSource, final Map<String,Object> params)
             throws ImageReadException, IOException {
         return null;
     }

     private static class IcnsHeader {
         public final int magic; // Magic literal (4 bytes), always "icns"
         public final int fileSize; // Length of file (4 bytes), in bytes.

         public IcnsHeader(final int magic, final int fileSize) {
             this.magic = magic;
             this.fileSize = fileSize;
         }

         public void dump(final PrintWriter pw) {
             pw.println("IcnsHeader");
             pw.println("Magic: 0x" + Integer.toHexString(magic) + " ("
                     + IcnsType.describeType(magic) + ")");
             pw.println("FileSize: " + fileSize);
             pw.println("");
         }
     }

     private IcnsHeader readIcnsHeader(final InputStream is)
             throws ImageReadException, IOException {
         final int Magic = read4Bytes("Magic", is, "Not a Valid ICNS File");
         final int FileSize = read4Bytes("FileSize", is, "Not a Valid ICNS File");

         if (Magic != ICNS_MAGIC) {
             throw new ImageReadException("Not a Valid ICNS File: "
                     + "magic is 0x" + Integer.toHexString(Magic));
         }

         return new IcnsHeader(Magic, FileSize);
     }

     public static class IcnsElement {
         public final int type;
         public final int elementSize;
         public final byte[] data;

         public IcnsElement(final int type, final int elementSize, final byte[] data) {
             this.type = type;
             this.elementSize = elementSize;
             this.data = data;
         }

         public void dump(final PrintWriter pw) {
             pw.println("IcnsElement");
             final IcnsType icnsType = IcnsType.findAnyType(type);
             String typeDescription;
             if (icnsType == null) {
                 typeDescription = "";
             } else {
                 typeDescription = " " + icnsType.toString();
             }
             pw.println("Type: 0x" + Integer.toHexString(type) + " ("
                     + IcnsType.describeType(type) + ")" + typeDescription);
             pw.println("ElementSize: " + elementSize);
             pw.println("");
         }
     }

     private IcnsElement readIcnsElement(final InputStream is) throws IOException {
         final int type = read4Bytes("Type", is, "Not a Valid ICNS File"); // Icon type
                                                                     // (4 bytes)
         final int elementSize = read4Bytes("ElementSize", is, "Not a Valid ICNS File"); // Length
                                                                                   // of
                                                                                   // data
                                                                                   // (4
                                                                                   // bytes),
                                                                                   // in
                                                                                   // bytes,
                                                                                   // including
                                                                                   // this
                                                                                   // header
         final byte[] data = readBytes("Data", is, elementSize - 8,
                 "Not a Valid ICNS File");

         return new IcnsElement(type, elementSize, data);
     }

     private static class IcnsContents {
         public final IcnsHeader icnsHeader;
         public final IcnsElement icnsElements[];

         public IcnsContents(final IcnsHeader icnsHeader,
                 final IcnsElement[] icnsElements) {
             super();
             this.icnsHeader = icnsHeader;
             this.icnsElements = icnsElements;
         }
     }

     private IcnsContents readImage(final ByteSource byteSource)
             throws ImageReadException, IOException {
         InputStream is = null;
         boolean canThrow = false;
         try {
             is = byteSource.getInputStream();
             final IcnsHeader icnsHeader = readIcnsHeader(is);

             final List<IcnsElement> icnsElementList = new ArrayList<IcnsElement>();
             for (int remainingSize = icnsHeader.fileSize - 8; remainingSize > 0;) {
                 final IcnsElement icnsElement = readIcnsElement(is);
                 icnsElementList.add(icnsElement);
                 remainingSize -= icnsElement.elementSize;
             }

             final IcnsElement[] icnsElements = new IcnsElement[icnsElementList.size()];
             for (int i = 0; i < icnsElements.length; i++) {
                 icnsElements[i] = icnsElementList.get(i);
             }

             final IcnsContents ret = new IcnsContents(icnsHeader, icnsElements);
             canThrow = true;
             return ret;
         } finally {
             IoUtils.closeQuietly(canThrow, is);
         }
     }

     @Override
     public boolean dumpImageFile(final PrintWriter pw, final ByteSource byteSource)
             throws ImageReadException, IOException {
         final IcnsContents icnsContents = readImage(byteSource);
         icnsContents.icnsHeader.dump(pw);
         for (final IcnsElement icnsElement : icnsContents.icnsElements) {
             icnsElement.dump(pw);
         }
         return true;
     }

     @Override
     public final BufferedImage getBufferedImage(final ByteSource byteSource,
             final Map<String,Object> params) throws ImageReadException, IOException {
         final IcnsContents icnsContents = readImage(byteSource);
         final List<BufferedImage> result = IcnsDecoder
                 .decodeAllImages(icnsContents.icnsElements);
         if (result.size() > 0) {
             return result.get(0);
         } else {
             throw new ImageReadException("No icons in ICNS file");
         }
     }

     @Override
     public List<BufferedImage> getAllBufferedImages(final ByteSource byteSource)
             throws ImageReadException, IOException {
         final IcnsContents icnsContents = readImage(byteSource);
         return IcnsDecoder.decodeAllImages(icnsContents.icnsElements);
     }

     @Override
     public void writeImage(final BufferedImage src, final OutputStream os, Map<String,Object> params)
             throws ImageWriteException, IOException {
         // make copy of params; we'll clear keys as we consume them.
         params = (params == null) ? new HashMap<String,Object>() : new HashMap<String,Object>(params);

         // clear format key.
         if (params.containsKey(PARAM_KEY_FORMAT)) {
             params.remove(PARAM_KEY_FORMAT);
         }

         if (params.size() > 0) {
             final Object firstKey = params.keySet().iterator().next();
             throw new ImageWriteException("Unknown parameter: " + firstKey);
         }

         IcnsType imageType;
         if (src.getWidth() == 16 && src.getHeight() == 16) {
             imageType = IcnsType.ICNS_16x16_32BIT_IMAGE;
         } else if (src.getWidth() == 32 && src.getHeight() == 32) {
             imageType = IcnsType.ICNS_32x32_32BIT_IMAGE;
         } else if (src.getWidth() == 48 && src.getHeight() == 48) {
             imageType = IcnsType.ICNS_48x48_32BIT_IMAGE;
         } else if (src.getWidth() == 128 && src.getHeight() == 128) {
             imageType = IcnsType.ICNS_128x128_32BIT_IMAGE;
         } else {
             throw new ImageWriteException("Invalid/unsupported source width "
                     + src.getWidth() + " and height " + src.getHeight());
         }

         final BinaryOutputStream bos = new BinaryOutputStream(os,
                 ByteOrder.BIG_ENDIAN);
         bos.write4Bytes(ICNS_MAGIC);
         bos.write4Bytes(4 + 4 + 4 + 4 + 4 * imageType.getWidth()
                 * imageType.getHeight() + 4 + 4 + imageType.getWidth()
                 * imageType.getHeight());

         bos.write4Bytes(imageType.getType());
         bos.write4Bytes(4 + 4 + 4 * imageType.getWidth()
                 * imageType.getHeight());
         for (int y = 0; y < src.getHeight(); y++) {
             for (int x = 0; x < src.getWidth(); x++) {
                 final int argb = src.getRGB(x, y);
                 bos.write(0);
                 bos.write(argb >> 16);
                 bos.write(argb >> 8);
                 bos.write(argb);
             }
         }

         final IcnsType maskType = IcnsType.find8BPPMaskType(imageType);
         bos.write4Bytes(maskType.getType());
         bos.write4Bytes(4 + 4 + imageType.getWidth() * imageType.getWidth());
         for (int y = 0; y < src.getHeight(); y++) {
             for (int x = 0; x < src.getWidth(); x++) {
                 final int argb = src.getRGB(x, y);
                 bos.write(argb >> 24);
             }
         }
     }

     /**
      * Extracts embedded XML metadata as XML string.
      * <p>
      *
      * @param byteSource
      *            File containing image data.
      * @param params
      *            Map of optional parameters, defined in ImagingConstants.
      * @return Xmp Xml as String, if present. Otherwise, returns null.
      */
     @Override
     public String getXmpXml(final ByteSource byteSource, final Map<String,Object> params)
             throws ImageReadException, IOException {
         return null;
     }
 }
	/*
	* 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.commons.imaging.formats.icns;

	import java.awt.Dimension;
	import java.awt.image.BufferedImage;
	import java.io.File;
	import java.io.IOException;
	import java.io.InputStream;
	import java.io.OutputStream;
	import java.io.PrintWriter;
	import java.util.ArrayList;
	import java.util.HashMap;
	import java.util.List;
	import java.util.Map;

	import org.apache.commons.imaging.ImageFormat;
	import org.apache.commons.imaging.ImageFormats;
	import org.apache.commons.imaging.ImageInfo;
	import org.apache.commons.imaging.ImageParser;
	import org.apache.commons.imaging.ImageReadException;
	import org.apache.commons.imaging.ImageWriteException;
	import org.apache.commons.imaging.common.BinaryOutputStream;
	import org.apache.commons.imaging.common.ByteOrder;
	import org.apache.commons.imaging.common.IImageMetadata;
	import org.apache.commons.imaging.common.bytesource.ByteSource;
	import org.apache.commons.imaging.util.IoUtils;
	import org.apache.commons.imaging.util.ParamMap;

	public class IcnsImageParser extends ImageParser {
	public static final int ICNS_MAGIC = IcnsType.typeAsInt("icns");

	public IcnsImageParser() {
	super.setByteOrder(ByteOrder.BIG_ENDIAN);
	}

	@Override
	public String getName() {
	return "icns-Custom";
	}

	@Override
	public String getDefaultExtension() {
	return DEFAULT_EXTENSION;
	}

	private static final String DEFAULT_EXTENSION = ".icns";

	private static final String ACCEPTED_EXTENSIONS[] = { ".icns", };

	@Override
	protected String[] getAcceptedExtensions() {
	return ACCEPTED_EXTENSIONS;
	}

	@Override
	protected ImageFormat[] getAcceptedTypes() {
	return new ImageFormat[] { ImageFormats.ICNS };
	}

	@Override
	public boolean embedICCProfile(final File src, final File dst, final byte profile[]) {
	return false;
	}

	@Override
	public IImageMetadata getMetadata(final ByteSource byteSource, final Map<String,Object> params)
	throws ImageReadException, IOException {
	return null;
	}

	@Override
	public ImageInfo getImageInfo(final ByteSource byteSource, Map<String,Object> params)
	throws ImageReadException, IOException {
	// make copy of params; we'll clear keys as we consume them.
	params = (params == null) ? new HashMap<String,Object>() : new HashMap<String,Object>(params);

	ParamMap.getParamBoolean(params, PARAM_KEY_VERBOSE, false);

	if (params.containsKey(PARAM_KEY_VERBOSE)) {
	params.remove(PARAM_KEY_VERBOSE);
	}

	if (params.size() > 0) {
	final Object firstKey = params.keySet().iterator().next();
	throw new ImageReadException("Unknown parameter: " + firstKey);
	}

	final IcnsContents contents = readImage(byteSource);
	final List<BufferedImage> images = IcnsDecoder
	.decodeAllImages(contents.icnsElements);
	if (images.isEmpty()) {
	throw new ImageReadException("No icons in ICNS file");
	}
	final BufferedImage image0 = images.get(0);
	return new ImageInfo("Icns", 32, new ArrayList<String>(),
	ImageFormats.ICNS, "ICNS Apple Icon Image",
	image0.getHeight(), "image/x-icns", images.size(), 0, 0, 0, 0,
	image0.getWidth(), false, true, false,
	ImageInfo.COLOR_TYPE_RGB,
	ImageInfo.COMPRESSION_ALGORITHM_UNKNOWN);
	}

	@Override
	public Dimension getImageSize(final ByteSource byteSource, Map<String,Object> params)
	throws ImageReadException, IOException {
	// make copy of params; we'll clear keys as we consume them.
	params = (params == null) ? new HashMap<String,Object>() : new HashMap<String,Object>(params);

	ParamMap.getParamBoolean(params, PARAM_KEY_VERBOSE, false);

	if (params.containsKey(PARAM_KEY_VERBOSE)) {
	params.remove(PARAM_KEY_VERBOSE);
	}

	if (params.size() > 0) {
	final Object firstKey = params.keySet().iterator().next();
	throw new ImageReadException("Unknown parameter: " + firstKey);
	}

	final IcnsContents contents = readImage(byteSource);
	final List<BufferedImage> images = IcnsDecoder
	.decodeAllImages(contents.icnsElements);
	if (images.isEmpty()) {
	throw new ImageReadException("No icons in ICNS file");
	}
	final BufferedImage image0 = images.get(0);
	return new Dimension(image0.getWidth(), image0.getHeight());
	}

	@Override
	public byte[] getICCProfileBytes(final ByteSource byteSource, final Map<String,Object> params)
	throws ImageReadException, IOException {
	return null;
	}

	private static class IcnsHeader {
	public final int magic; // Magic literal (4 bytes), always "icns"
	public final int fileSize; // Length of file (4 bytes), in bytes.

	public IcnsHeader(final int magic, final int fileSize) {
	this.magic = magic;
	this.fileSize = fileSize;
	}

	public void dump(final PrintWriter pw) {
	pw.println("IcnsHeader");
	pw.println("Magic: 0x" + Integer.toHexString(magic) + " ("
	+ IcnsType.describeType(magic) + ")");
	pw.println("FileSize: " + fileSize);
	pw.println("");
	}
	}

	private IcnsHeader readIcnsHeader(final InputStream is)
	throws ImageReadException, IOException {
	final int Magic = read4Bytes("Magic", is, "Not a Valid ICNS File");
	final int FileSize = read4Bytes("FileSize", is, "Not a Valid ICNS File");

	if (Magic != ICNS_MAGIC) {
	throw new ImageReadException("Not a Valid ICNS File: "
	+ "magic is 0x" + Integer.toHexString(Magic));
	}

	return new IcnsHeader(Magic, FileSize);
	}

	public static class IcnsElement {
	public final int type;
	public final int elementSize;
	public final byte[] data;

	public IcnsElement(final int type, final int elementSize, final byte[] data) {
	this.type = type;
	this.elementSize = elementSize;
	this.data = data;
	}

	public void dump(final PrintWriter pw) {
	pw.println("IcnsElement");
	final IcnsType icnsType = IcnsType.findAnyType(type);
	String typeDescription;
	if (icnsType == null) {
	typeDescription = "";
	} else {
	typeDescription = " " + icnsType.toString();
	}
	pw.println("Type: 0x" + Integer.toHexString(type) + " ("
	+ IcnsType.describeType(type) + ")" + typeDescription);
	pw.println("ElementSize: " + elementSize);
	pw.println("");
	}
	}

	private IcnsElement readIcnsElement(final InputStream is) throws IOException {
	final int type = read4Bytes("Type", is, "Not a Valid ICNS File"); // Icon type
	// (4 bytes)
	final int elementSize = read4Bytes("ElementSize", is, "Not a Valid ICNS File"); // Length
	// of
	// data
	// (4
	// bytes),
	// in
	// bytes,
	// including
	// this
	// header
	final byte[] data = readBytes("Data", is, elementSize - 8,
	"Not a Valid ICNS File");

	return new IcnsElement(type, elementSize, data);
	}

	private static class IcnsContents {
	public final IcnsHeader icnsHeader;
	public final IcnsElement icnsElements[];

	public IcnsContents(final IcnsHeader icnsHeader,
	final IcnsElement[] icnsElements) {
	super();
	this.icnsHeader = icnsHeader;
	this.icnsElements = icnsElements;
	}
	}

	private IcnsContents readImage(final ByteSource byteSource)
	throws ImageReadException, IOException {
	InputStream is = null;
	boolean canThrow = false;
	try {
	is = byteSource.getInputStream();
	final IcnsHeader icnsHeader = readIcnsHeader(is);

	final List<IcnsElement> icnsElementList = new ArrayList<IcnsElement>();
	for (int remainingSize = icnsHeader.fileSize - 8; remainingSize > 0;) {
	final IcnsElement icnsElement = readIcnsElement(is);
	icnsElementList.add(icnsElement);
	remainingSize -= icnsElement.elementSize;
	}

	final IcnsElement[] icnsElements = new IcnsElement[icnsElementList.size()];
	for (int i = 0; i < icnsElements.length; i++) {
	icnsElements[i] = icnsElementList.get(i);
	}

	final IcnsContents ret = new IcnsContents(icnsHeader, icnsElements);
	canThrow = true;
	return ret;
	} finally {
	IoUtils.closeQuietly(canThrow, is);
	}
	}

	@Override
	public boolean dumpImageFile(final PrintWriter pw, final ByteSource byteSource)
	throws ImageReadException, IOException {
	final IcnsContents icnsContents = readImage(byteSource);
	icnsContents.icnsHeader.dump(pw);
	for (final IcnsElement icnsElement : icnsContents.icnsElements) {
	icnsElement.dump(pw);
	}
	return true;
	}

	@Override
	public final BufferedImage getBufferedImage(final ByteSource byteSource,
	final Map<String,Object> params) throws ImageReadException, IOException {
	final IcnsContents icnsContents = readImage(byteSource);
	final List<BufferedImage> result = IcnsDecoder
	.decodeAllImages(icnsContents.icnsElements);
	if (result.size() > 0) {
	return result.get(0);
	} else {
	throw new ImageReadException("No icons in ICNS file");
	}
	}

	@Override
	public List<BufferedImage> getAllBufferedImages(final ByteSource byteSource)
	throws ImageReadException, IOException {
	final IcnsContents icnsContents = readImage(byteSource);
	return IcnsDecoder.decodeAllImages(icnsContents.icnsElements);
	}

	@Override
	public void writeImage(final BufferedImage src, final OutputStream os, Map<String,Object> params)
	throws ImageWriteException, IOException {
	// make copy of params; we'll clear keys as we consume them.
	params = (params == null) ? new HashMap<String,Object>() : new HashMap<String,Object>(params);

	// clear format key.
	if (params.containsKey(PARAM_KEY_FORMAT)) {
	params.remove(PARAM_KEY_FORMAT);
	}

	if (params.size() > 0) {
	final Object firstKey = params.keySet().iterator().next();
	throw new ImageWriteException("Unknown parameter: " + firstKey);
	}

	IcnsType imageType;
	if (src.getWidth() == 16 && src.getHeight() == 16) {
	imageType = IcnsType.ICNS_16x16_32BIT_IMAGE;
	} else if (src.getWidth() == 32 && src.getHeight() == 32) {
	imageType = IcnsType.ICNS_32x32_32BIT_IMAGE;
	} else if (src.getWidth() == 48 && src.getHeight() == 48) {
	imageType = IcnsType.ICNS_48x48_32BIT_IMAGE;
	} else if (src.getWidth() == 128 && src.getHeight() == 128) {
	imageType = IcnsType.ICNS_128x128_32BIT_IMAGE;
	} else {
	throw new ImageWriteException("Invalid/unsupported source width "
	+ src.getWidth() + " and height " + src.getHeight());
	}

	final BinaryOutputStream bos = new BinaryOutputStream(os,
	ByteOrder.BIG_ENDIAN);
	bos.write4Bytes(ICNS_MAGIC);
	bos.write4Bytes(4 + 4 + 4 + 4 + 4 * imageType.getWidth()
	* imageType.getHeight() + 4 + 4 + imageType.getWidth()
	* imageType.getHeight());

	bos.write4Bytes(imageType.getType());
	bos.write4Bytes(4 + 4 + 4 * imageType.getWidth()
	* imageType.getHeight());
	for (int y = 0; y < src.getHeight(); y++) {
	for (int x = 0; x < src.getWidth(); x++) {
	final int argb = src.getRGB(x, y);
	bos.write(0);
	bos.write(argb >> 16);
	bos.write(argb >> 8);
	bos.write(argb);
	}
	}

	final IcnsType maskType = IcnsType.find8BPPMaskType(imageType);
	bos.write4Bytes(maskType.getType());
	bos.write4Bytes(4 + 4 + imageType.getWidth() * imageType.getWidth());
	for (int y = 0; y < src.getHeight(); y++) {
	for (int x = 0; x < src.getWidth(); x++) {
	final int argb = src.getRGB(x, y);
	bos.write(argb >> 24);
	}
	}
	}

	/**
	* Extracts embedded XML metadata as XML string.
	* <p>
	*
	* @param byteSource
	* File containing image data.
	* @param params
	* Map of optional parameters, defined in ImagingConstants.
	* @return Xmp Xml as String, if present. Otherwise, returns null.
	*/
	@Override
	public String getXmpXml(final ByteSource byteSource, final Map<String,Object> params)
	throws ImageReadException, IOException {
	return null;
	}
	}