| /* ImageIO.java -- |
| Copyright (C) 2004, 2005 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package javax.imageio; |
| |
| import java.awt.image.BufferedImage; |
| import java.awt.image.RenderedImage; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.net.URL; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Iterator; |
| |
| import javax.imageio.spi.IIORegistry; |
| import javax.imageio.spi.ImageReaderSpi; |
| import javax.imageio.spi.ImageWriterSpi; |
| import javax.imageio.spi.ServiceRegistry; |
| import javax.imageio.stream.ImageInputStream; |
| import javax.imageio.stream.ImageOutputStream; |
| import javax.imageio.stream.MemoryCacheImageInputStream; |
| import javax.imageio.stream.MemoryCacheImageOutputStream; |
| |
| public final class ImageIO |
| { |
| /** |
| * This class isn't intended to be instantiated. |
| */ |
| private ImageIO() {} |
| |
| private static final class ReaderFormatFilter implements ServiceRegistry.Filter |
| { |
| private String formatName; |
| |
| public ReaderFormatFilter(String formatName) |
| { |
| this.formatName = formatName; |
| } |
| |
| public boolean filter (Object provider) |
| { |
| if (provider instanceof ImageReaderSpi) |
| { |
| ImageReaderSpi spi = (ImageReaderSpi) provider; |
| String[] formatNames = spi.getFormatNames(); |
| |
| for (int i = formatNames.length - 1; i >= 0; --i) |
| if (formatName.equals(formatNames[i])) |
| return true; |
| } |
| |
| return false; |
| } |
| } |
| |
| private static final class ReaderMIMETypeFilter implements ServiceRegistry.Filter |
| { |
| private String MIMEType; |
| |
| public ReaderMIMETypeFilter(String MIMEType) |
| { |
| this.MIMEType = MIMEType; |
| } |
| |
| public boolean filter(Object provider) |
| { |
| if (provider instanceof ImageReaderSpi) |
| { |
| ImageReaderSpi spi = (ImageReaderSpi) provider; |
| String[] mimetypes = spi.getMIMETypes(); |
| |
| for (int i = mimetypes.length - 1; i >= 0; --i) |
| if (MIMEType.equals(mimetypes[i])) |
| return true; |
| } |
| |
| return false; |
| } |
| } |
| |
| private static final class ReaderSuffixFilter implements ServiceRegistry.Filter |
| { |
| private String fileSuffix; |
| |
| public ReaderSuffixFilter(String fileSuffix) |
| { |
| this.fileSuffix = fileSuffix; |
| } |
| |
| public boolean filter(Object provider) |
| { |
| if (provider instanceof ImageReaderSpi) |
| { |
| ImageReaderSpi spi = (ImageReaderSpi) provider; |
| String[] suffixes = spi.getFileSuffixes(); |
| |
| for (int i = suffixes.length - 1; i >= 0; --i) |
| if (fileSuffix.equals(suffixes[i])) |
| return true; |
| } |
| |
| return false; |
| } |
| } |
| |
| private static final class WriterFormatFilter implements ServiceRegistry.Filter |
| { |
| private String formatName; |
| |
| public WriterFormatFilter(String formatName) |
| { |
| this.formatName = formatName; |
| } |
| |
| public boolean filter(Object provider) |
| { |
| if (provider instanceof ImageWriterSpi) |
| { |
| ImageWriterSpi spi = (ImageWriterSpi) provider; |
| String[] formatNames = spi.getFormatNames(); |
| |
| for (int i = formatNames.length - 1; i >= 0; --i) |
| if (formatName.equals(formatNames[i])) |
| return true; |
| } |
| |
| return false; |
| } |
| } |
| |
| private static final class WriterMIMETypeFilter implements ServiceRegistry.Filter |
| { |
| private String MIMEType; |
| |
| public WriterMIMETypeFilter(String MIMEType) |
| { |
| this.MIMEType = MIMEType; |
| } |
| |
| public boolean filter(Object provider) |
| { |
| if (provider instanceof ImageWriterSpi) |
| { |
| ImageWriterSpi spi = (ImageWriterSpi) provider; |
| String[] mimetypes = spi.getMIMETypes(); |
| |
| for (int i = mimetypes.length - 1; i >= 0; --i) |
| if (MIMEType.equals(mimetypes[i])) |
| return true; |
| } |
| |
| return false; |
| } |
| } |
| |
| private static final class WriterSuffixFilter implements ServiceRegistry.Filter |
| { |
| private String fileSuffix; |
| |
| public WriterSuffixFilter(String fileSuffix) |
| { |
| this.fileSuffix = fileSuffix; |
| } |
| |
| public boolean filter(Object provider) |
| { |
| if (provider instanceof ImageWriterSpi) |
| { |
| ImageWriterSpi spi = (ImageWriterSpi) provider; |
| String[] suffixes = spi.getFileSuffixes(); |
| |
| for (int i = suffixes.length - 1; i >= 0; --i) |
| if (fileSuffix.equals(suffixes[i])) |
| return true; |
| } |
| |
| return false; |
| } |
| } |
| |
| private static final class ImageReaderIterator implements Iterator |
| { |
| Iterator it; |
| Object readerExtension; |
| |
| public ImageReaderIterator(Iterator it, Object readerExtension) |
| { |
| this.it = it; |
| this.readerExtension = readerExtension; |
| } |
| |
| public boolean hasNext() |
| { |
| return it.hasNext(); |
| } |
| |
| public Object next() |
| { |
| try |
| { |
| return ((ImageReaderSpi) it.next()).createReaderInstance(readerExtension); |
| } |
| catch (IOException e) |
| { |
| return null; |
| } |
| } |
| |
| public void remove() |
| { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| private static final class ImageWriterIterator implements Iterator |
| { |
| Iterator it; |
| Object writerExtension; |
| |
| public ImageWriterIterator(Iterator it, Object writerExtension) |
| { |
| this.it = it; |
| this.writerExtension = writerExtension; |
| } |
| |
| public boolean hasNext() |
| { |
| return it.hasNext(); |
| } |
| |
| public Object next() |
| { |
| try |
| { |
| return ((ImageWriterSpi) it.next()).createWriterInstance(writerExtension); |
| } |
| catch (IOException e) |
| { |
| return null; |
| } |
| } |
| |
| public void remove() |
| { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| private static File cacheDirectory; |
| private static boolean useCache = true; |
| |
| private static Iterator getReadersByFilter(Class type, |
| ServiceRegistry.Filter filter, |
| Object readerExtension) |
| { |
| try |
| { |
| Iterator it = getRegistry().getServiceProviders(type, filter, true); |
| return new ImageReaderIterator(it, readerExtension); |
| } |
| catch (IllegalArgumentException e) |
| { |
| return Collections.EMPTY_SET.iterator(); |
| } |
| } |
| |
| private static Iterator getWritersByFilter(Class type, |
| ServiceRegistry.Filter filter, |
| Object writerExtension) |
| { |
| try |
| { |
| Iterator it = getRegistry().getServiceProviders(type, filter, true); |
| return new ImageWriterIterator(it, writerExtension); |
| } |
| catch (IllegalArgumentException e) |
| { |
| return Collections.EMPTY_SET.iterator(); |
| } |
| } |
| |
| public static File getCacheDirectory() |
| { |
| return cacheDirectory; |
| } |
| |
| public static Iterator getImageReadersByFormatName(String formatName) |
| { |
| if (formatName == null) |
| throw new IllegalArgumentException("formatName may not be null"); |
| |
| return getReadersByFilter(ImageReaderSpi.class, |
| new ReaderFormatFilter(formatName), |
| formatName); |
| } |
| |
| public static Iterator getImageReadersByMIMEType(String MIMEType) |
| { |
| if (MIMEType == null) |
| throw new IllegalArgumentException("MIMEType may not be null"); |
| |
| return getReadersByFilter(ImageReaderSpi.class, |
| new ReaderMIMETypeFilter(MIMEType), |
| MIMEType); |
| } |
| |
| public static Iterator getImageReadersBySuffix(String fileSuffix) |
| { |
| if (fileSuffix == null) |
| throw new IllegalArgumentException("formatName may not be null"); |
| |
| return getReadersByFilter(ImageReaderSpi.class, |
| new ReaderSuffixFilter(fileSuffix), |
| fileSuffix); |
| } |
| |
| public static Iterator getImageWritersByFormatName(String formatName) |
| { |
| if (formatName == null) |
| throw new IllegalArgumentException("formatName may not be null"); |
| |
| return getWritersByFilter(ImageWriterSpi.class, |
| new WriterFormatFilter(formatName), |
| formatName); |
| } |
| |
| public static Iterator getImageWritersByMIMEType(String MIMEType) |
| { |
| if (MIMEType == null) |
| throw new IllegalArgumentException("MIMEType may not be null"); |
| |
| return getWritersByFilter(ImageWriterSpi.class, |
| new WriterMIMETypeFilter(MIMEType), |
| MIMEType); |
| } |
| |
| public static Iterator getImageWritersBySuffix(String fileSuffix) |
| { |
| if (fileSuffix == null) |
| throw new IllegalArgumentException("fileSuffix may not be null"); |
| |
| return getWritersByFilter(ImageWriterSpi.class, |
| new WriterSuffixFilter(fileSuffix), |
| fileSuffix); |
| } |
| |
| public static String[] getReaderFormatNames() |
| { |
| try |
| { |
| Iterator it = |
| getRegistry().getServiceProviders(ImageReaderSpi.class, true); |
| ArrayList result = new ArrayList(); |
| |
| while (it.hasNext()) |
| { |
| ImageReaderSpi spi = (ImageReaderSpi) it.next(); |
| String[] names = spi.getFormatNames(); |
| |
| for (int i = names.length - 1; i >= 0; --i) |
| result.add(names[i]); |
| } |
| |
| return (String[]) result.toArray(new String[result.size()]); |
| } |
| catch (IllegalArgumentException e) |
| { |
| return new String[0]; |
| } |
| } |
| |
| public static String[] getReaderMIMETypes() |
| { |
| try |
| { |
| Iterator it = |
| getRegistry().getServiceProviders(ImageReaderSpi.class, true); |
| ArrayList result = new ArrayList(); |
| |
| while (it.hasNext()) |
| { |
| ImageReaderSpi spi = (ImageReaderSpi) it.next(); |
| String[] names = spi.getMIMETypes(); |
| |
| for (int i = names.length - 1; i >= 0; --i) |
| result.add(names[i]); |
| } |
| |
| return (String[]) result.toArray(new String[result.size()]); |
| } |
| catch (IllegalArgumentException e) |
| { |
| return new String[0]; |
| } |
| } |
| |
| private static IIORegistry getRegistry() |
| { |
| return IIORegistry.getDefaultInstance(); |
| } |
| |
| public static boolean getUseCache() |
| { |
| return useCache; |
| } |
| |
| public static String[] getWriterFormatNames() |
| { |
| try |
| { |
| Iterator it = |
| getRegistry().getServiceProviders(ImageWriterSpi.class, true); |
| ArrayList result = new ArrayList(); |
| |
| while (it.hasNext()) |
| { |
| ImageWriterSpi spi = (ImageWriterSpi) it.next(); |
| String[] names = spi.getFormatNames(); |
| |
| for (int i = names.length - 1; i >= 0; --i) |
| result.add(names[i]); |
| } |
| |
| return (String[]) result.toArray(new String[result.size()]); |
| } |
| catch (IllegalArgumentException e) |
| { |
| return new String[0]; |
| } |
| } |
| |
| public static String[] getWriterMIMETypes() |
| { |
| try |
| { |
| Iterator it = |
| getRegistry().getServiceProviders(ImageWriterSpi.class, true); |
| ArrayList result = new ArrayList(); |
| |
| while (it.hasNext()) |
| { |
| ImageWriterSpi spi = (ImageWriterSpi) it.next(); |
| String[] names = spi.getMIMETypes(); |
| |
| for (int i = names.length - 1; i >= 0; --i) |
| result.add(names[i]); |
| } |
| |
| return (String[]) result.toArray(new String[result.size()]); |
| } |
| catch (IllegalArgumentException e) |
| { |
| return new String[0]; |
| } |
| } |
| |
| /** |
| * Rescans the application classpath for ImageIO service providers |
| * and registers them. |
| */ |
| public static void scanForPlugins() |
| { |
| IIORegistry.getDefaultInstance().registerApplicationClasspathSpis(); |
| } |
| |
| public static void setCacheDirectory(File cacheDirectory) |
| { |
| if (cacheDirectory != null) |
| { |
| if (!cacheDirectory.isDirectory()) |
| throw new IllegalArgumentException("cacheDirectory must be a directory"); |
| |
| cacheDirectory.canWrite(); |
| } |
| |
| ImageIO.cacheDirectory = cacheDirectory; |
| } |
| |
| public static void setUseCache(boolean useCache) |
| { |
| ImageIO.useCache = useCache; |
| } |
| |
| /* |
| * "Standard" simplified entry points. |
| */ |
| |
| public static boolean write(RenderedImage im, |
| String formatName, |
| File output) |
| throws IOException |
| { |
| return write(im, formatName, new FileOutputStream(output)); |
| } |
| |
| public static boolean write(RenderedImage im, |
| String formatName, |
| OutputStream output) |
| throws IOException |
| { |
| return write(im, formatName, new MemoryCacheImageOutputStream(output)); |
| } |
| |
| |
| public static boolean write(RenderedImage im, |
| String formatName, |
| ImageOutputStream output) |
| throws IOException |
| { |
| Iterator writers = getImageWritersByFormatName(formatName); |
| IIOImage img = new IIOImage(im, null, null); |
| while (writers.hasNext()) |
| { |
| ImageWriter w = (ImageWriter) writers.next(); |
| try |
| { |
| w.setOutput(output); |
| } |
| catch (IllegalArgumentException e) |
| { |
| continue; |
| } |
| |
| w.write(null, img, null); |
| output.close(); |
| return true; |
| } |
| return false; |
| } |
| |
| public static BufferedImage read(ImageInputStream stream) |
| throws IOException |
| { |
| Iterator providers = getRegistry().getServiceProviders(ImageReaderSpi.class, true); |
| while (providers.hasNext()) |
| { |
| ImageReaderSpi spi = (ImageReaderSpi) providers.next(); |
| if (spi.canDecodeInput(stream)) |
| { |
| ImageReader reader = spi.createReaderInstance(); |
| reader.setInput(stream); |
| return reader.read(0, null); |
| } |
| } |
| return null; |
| } |
| |
| public static BufferedImage read(URL input) |
| throws IOException |
| { |
| return read(input.openStream()); |
| } |
| |
| public static BufferedImage read(InputStream input) |
| throws IOException |
| { |
| return read(new MemoryCacheImageInputStream(input)); |
| } |
| |
| public static BufferedImage read(File input) |
| throws IOException |
| { |
| return read(new FileInputStream(input)); |
| } |
| |
| } |