| /* |
| * Copyright 2000-2004 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| package com.sun.imageio.plugins.jpeg; |
| |
| import javax.imageio.spi.ImageWriterSpi; |
| import javax.imageio.spi.ServiceRegistry; |
| import javax.imageio.spi.IIORegistry; |
| import javax.imageio.ImageWriter; |
| import javax.imageio.ImageTypeSpecifier; |
| import javax.imageio.IIOException; |
| |
| import java.awt.image.ColorModel; |
| import java.awt.image.IndexColorModel; |
| import java.awt.image.SampleModel; |
| import java.util.Locale; |
| |
| public class JPEGImageWriterSpi extends ImageWriterSpi { |
| |
| private static String [] readerSpiNames = |
| {"com.sun.imageio.plugins.jpeg.JPEGImageReaderSpi"}; |
| |
| private boolean registered = false; |
| |
| public JPEGImageWriterSpi() { |
| super(JPEG.vendor, |
| JPEG.version, |
| JPEG.names, |
| JPEG.suffixes, |
| JPEG.MIMETypes, |
| "com.sun.imageio.plugins.jpeg.JPEGImageWriter", |
| STANDARD_OUTPUT_TYPE, |
| readerSpiNames, |
| true, |
| JPEG.nativeStreamMetadataFormatName, |
| JPEG.nativeStreamMetadataFormatClassName, |
| null, null, |
| true, |
| JPEG.nativeImageMetadataFormatName, |
| JPEG.nativeImageMetadataFormatClassName, |
| null, null |
| ); |
| } |
| |
| public String getDescription(Locale locale) { |
| return "Standard JPEG Image Writer"; |
| } |
| |
| public void onRegistration(ServiceRegistry registry, |
| Class<?> category) { |
| if (registered) { |
| return; |
| } |
| try { |
| java.security.AccessController.doPrivileged( |
| new sun.security.action.LoadLibraryAction("jpeg")); |
| } catch (Throwable e) { // Fail on any Throwable |
| // if it can't be loaded, deregister and return |
| registry.deregisterServiceProvider(this); |
| return; |
| } |
| |
| registered = true; |
| } |
| |
| public boolean isFormatLossless() { |
| return false; |
| } |
| |
| public boolean canEncodeImage(ImageTypeSpecifier type) { |
| SampleModel sampleModel = type.getSampleModel(); |
| |
| // Find the maximum bit depth across all channels |
| int[] sampleSize = sampleModel.getSampleSize(); |
| int bitDepth = sampleSize[0]; |
| for (int i = 1; i < sampleSize.length; i++) { |
| if (sampleSize[i] > bitDepth) { |
| bitDepth = sampleSize[i]; |
| } |
| } |
| |
| // 4450894: Ensure bitDepth is between 1 and 8 |
| if (bitDepth < 1 || bitDepth > 8) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| public ImageWriter createWriterInstance(Object extension) |
| throws IIOException { |
| return new JPEGImageWriter(this); |
| } |
| } |