diff options
Diffstat (limited to 'libjava/classpath/javax/imageio/ImageIO.java')
| -rw-r--r-- | libjava/classpath/javax/imageio/ImageIO.java | 605 |
1 files changed, 605 insertions, 0 deletions
diff --git a/libjava/classpath/javax/imageio/ImageIO.java b/libjava/classpath/javax/imageio/ImageIO.java new file mode 100644 index 00000000000..95c7c325121 --- /dev/null +++ b/libjava/classpath/javax/imageio/ImageIO.java @@ -0,0 +1,605 @@ +/* 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., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 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)); + } + +} |
