/******************************************************************************* * Copyright (c) 2000, 2003 IBM Corporation and others. * All rights reserved. This program and the accompanying materials  * are made available under the terms of the Common Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/cpl-v10.html *  * Contributors: *     IBM Corporation - initial API and implementation *******************************************************************************/package org.eclipse.swt.internal.image;import java.io.*;import org.eclipse.swt.*;import org.eclipse.swt.graphics.*;public abstract class FileFormat {	static final String FORMAT_PACKAGE = "org.eclipse.swt.internal.image"; //$NON-NLS-1$	static final String FORMAT_SUFFIX = "FileFormat"; //$NON-NLS-1$	static final String[] FORMATS = {"WinBMP", "WinBMP", "GIF", "WinICO", "JPEG", "PNG", "TIFF"}; //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$//$NON-NLS-5$ //$NON-NLS-6$//$NON-NLS-7$		LEDataInputStream inputStream;	LEDataOutputStream outputStream;	ImageLoader loader;	int compression;byte[] bitInvertData(byte[] data, int startIndex, int endIndex) {	// Destructively bit invert data in the given byte array.	for (int i = startIndex; i < endIndex; i++) {		data[i] = (byte)(255 - data[i - startIndex]);	}	return data;}/** * Return whether or not the specified input stream * represents a supported file format. */abstract boolean isFileFormat(LEDataInputStream stream);abstract ImageData[] loadFromByteStream();public ImageData[] loadFromStream(LEDataInputStream stream) {	try {		inputStream = stream;		return loadFromByteStream();	} catch (Exception e) {		SWT.error(SWT.ERROR_IO, e);		return null;	}}public static ImageData[] load(InputStream is, ImageLoader loader) {	FileFormat fileFormat = null;	LEDataInputStream stream = new LEDataInputStream(is);	boolean isSupported = false;		for (int i = 1; i < FORMATS.length; i++) {		if (FORMATS[i] != null) {			try {				Class clazz = Class.forName(FORMAT_PACKAGE + '.' + FORMATS[i] + FORMAT_SUFFIX);				fileFormat = (FileFormat) clazz.newInstance();				if (fileFormat.isFileFormat(stream)) {					isSupported = true;					break;				}			} catch (ClassNotFoundException e) {				FORMATS[i] = null;			} catch (Exception e) {			}		}	}	if (!isSupported) SWT.error(SWT.ERROR_UNSUPPORTED_FORMAT);	fileFormat.loader = loader;	return fileFormat.loadFromStream(stream);}public static void save(OutputStream os, int format, ImageLoader loader) {	if (format < 0 || format >= FORMATS.length) SWT.error(SWT.ERROR_INVALID_ARGUMENT);	if (FORMATS[format] == null) SWT.error(SWT.ERROR_INVALID_ARGUMENT);	/* We do not currently support writing multi-image files,	 * so we use the first image data in the loader's array. */	ImageData data = loader.data[0];	LEDataOutputStream stream = new LEDataOutputStream(os);	FileFormat fileFormat = null;	try {		Class clazz = Class.forName(FORMAT_PACKAGE + '.' + FORMATS[format] + FORMAT_SUFFIX);		fileFormat = (FileFormat) clazz.newInstance();	} catch (Exception e) {		SWT.error(SWT.ERROR_INVALID_ARGUMENT);	}	if (format == SWT.IMAGE_BMP_RLE) {		switch (data.depth) {			case 8: fileFormat.compression = 1; break;			case 4: fileFormat.compression = 2; break;		}	}	fileFormat.unloadIntoStream(data, stream);}abstract void unloadIntoByteStream(ImageData image);public void unloadIntoStream(ImageData image, LEDataOutputStream stream) {	try {		outputStream = stream;		unloadIntoByteStream(image);		outputStream.close();	} catch (Exception e) {		try {outputStream.close();} catch (Exception f) {}		SWT.error(SWT.ERROR_IO, e);	}}}