1 files changed, 129 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/FileFormat.java b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/FileFormat.java
new file mode 100755
index 0000000000..074b038bb5
--- /dev/null
+++ b/bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/FileFormat.java
@@ -0,0 +1,129 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2006 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-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.*;
+
+/**
+ * Abstract factory class for loading/unloading images from files or streams
+ * in various image file formats.
+ *
+ */
+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", "OS2BMP"}; //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$//$NON-NLS-5$ //$NON-NLS-6$//$NON-NLS-7$//$NON-NLS-8$
+	
+	LEDataInputStream inputStream;
+	LEDataOutputStream outputStream;
+	ImageLoader loader;
+	int compression;
+
+/**
+ * Return whether or not the specified input stream
+ * represents a supported file format.
+ */
+abstract boolean isFileFormat(LEDataInputStream stream);
+
+abstract ImageData[] loadFromByteStream();
+
+/**
+ * Read the specified input stream, and return the
+ * device independent image array represented by the stream.
+ */	
+public ImageData[] loadFromStream(LEDataInputStream stream) {
+	try {
+		inputStream = stream;
+		return loadFromByteStream();
+	} catch (Exception e) {
+		if (e instanceof IOException) {
+			SWT.error(SWT.ERROR_IO, e);
+		} else {
+			SWT.error(SWT.ERROR_INVALID_IMAGE, e);
+		}
+		return null;
+	}
+}
+
+/**
+ * Read the specified input stream using the specified loader, and
+ * return the device independent image array represented by the stream.
+ */	
+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);
+}
+
+/**
+ * Write the device independent image array stored in the specified loader
+ * to the specified output stream using the specified file format.
+ */	
+public static void save(OutputStream os, int format, ImageLoader loader) {
+	if (format < 0 || format >= FORMATS.length) SWT.error(SWT.ERROR_UNSUPPORTED_FORMAT);
+	if (FORMATS[format] == null) SWT.error(SWT.ERROR_UNSUPPORTED_FORMAT);
+	if (loader.data == null || loader.data.length < 1) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
+
+	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_UNSUPPORTED_FORMAT);
+	}
+	if (format == SWT.IMAGE_BMP_RLE) {
+		switch (loader.data[0].depth) {
+			case 8: fileFormat.compression = 1; break;
+			case 4: fileFormat.compression = 2; break;
+		}
+	}
+	fileFormat.unloadIntoStream(loader, stream);
+}
+
+abstract void unloadIntoByteStream(ImageLoader loader);
+
+/**
+ * Write the device independent image array stored in the specified loader
+ * to the specified output stream.
+ */	
+public void unloadIntoStream(ImageLoader loader, LEDataOutputStream stream) {
+	try {
+		outputStream = stream;
+		unloadIntoByteStream(loader);
+		outputStream.flush();
+	} catch (Exception e) {
+		try {outputStream.flush();} catch (Exception f) {}
+		SWT.error(SWT.ERROR_IO, e);
+	}
+}
+}