| /* |
| * Copyright (c) 2003, 2013, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.imageio.plugins.wbmp; |
| |
| import java.util.Locale; |
| import javax.imageio.spi.ImageReaderSpi; |
| import javax.imageio.stream.ImageInputStream; |
| import javax.imageio.spi.IIORegistry; |
| import javax.imageio.spi.ServiceRegistry; |
| import java.io.IOException; |
| import javax.imageio.ImageReader; |
| import javax.imageio.IIOException; |
| import com.sun.imageio.plugins.common.ReaderUtil; |
| |
| public class WBMPImageReaderSpi extends ImageReaderSpi { |
| |
| private static final int MAX_WBMP_WIDTH = 1024; |
| private static final int MAX_WBMP_HEIGHT = 768; |
| |
| private static String [] writerSpiNames = |
| {"com.sun.imageio.plugins.wbmp.WBMPImageWriterSpi"}; |
| private static String[] formatNames = {"wbmp", "WBMP"}; |
| private static String[] entensions = {"wbmp"}; |
| private static String[] mimeType = {"image/vnd.wap.wbmp"}; |
| |
| private boolean registered = false; |
| |
| public WBMPImageReaderSpi() { |
| super("Oracle Corporation", |
| "1.0", |
| formatNames, |
| entensions, |
| mimeType, |
| "com.sun.imageio.plugins.wbmp.WBMPImageReader", |
| new Class[] { ImageInputStream.class }, |
| writerSpiNames, |
| true, |
| null, null, null, null, |
| true, |
| WBMPMetadata.nativeMetadataFormatName, |
| "com.sun.imageio.plugins.wbmp.WBMPMetadataFormat", |
| null, null); |
| } |
| |
| public void onRegistration(ServiceRegistry registry, |
| Class<?> category) { |
| if (registered) { |
| return; |
| } |
| registered = true; |
| } |
| |
| public String getDescription(Locale locale) { |
| return "Standard WBMP Image Reader"; |
| } |
| |
| public boolean canDecodeInput(Object source) throws IOException { |
| if (!(source instanceof ImageInputStream)) { |
| return false; |
| } |
| |
| ImageInputStream stream = (ImageInputStream)source; |
| |
| stream.mark(); |
| try { |
| int type = stream.readByte(); // TypeField |
| int fixHeaderField = stream.readByte(); |
| // check WBMP "header" |
| if (type != 0 || fixHeaderField != 0) { |
| // while WBMP reader does not support ext WBMP headers |
| return false; |
| } |
| |
| int width = ReaderUtil.readMultiByteInteger(stream); |
| int height = ReaderUtil.readMultiByteInteger(stream); |
| // check image dimension |
| if (width <= 0 || height <= 0) { |
| return false; |
| } |
| |
| long dataLength = stream.length(); |
| if (dataLength == -1) { |
| // We can't verify that amount of data in the stream |
| // corresponds to image dimension because we do not know |
| // the length of the data stream. |
| // Assuming that wbmp image are used for mobile devices, |
| // let's introduce an upper limit for image dimension. |
| // In case if exact amount of raster data is unknown, |
| // let's reject images with dimension above the limit. |
| return (width < MAX_WBMP_WIDTH) && (height < MAX_WBMP_HEIGHT); |
| } |
| |
| dataLength -= stream.getStreamPosition(); |
| |
| long scanSize = (width / 8) + ((width % 8) == 0 ? 0 : 1); |
| |
| return (dataLength == scanSize * height); |
| } finally { |
| stream.reset(); |
| } |
| } |
| |
| public ImageReader createReaderInstance(Object extension) |
| throws IIOException { |
| return new WBMPImageReader(this); |
| } |
| } |