swt snippets

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diff --git a/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet156.java b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet156.java
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+/*******************************************************************************
+ * Copyright (c) 2000, 2004 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.snippets;
+
+/*
+ * example snippet: convert between SWT Image and AWT BufferedImage
+ *
+ * For a list of all SWT example snippets see
+ * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
+ */
+import java.awt.Frame;
+import java.awt.Graphics;
+import java.awt.Insets;
+import java.awt.image.BufferedImage;
+import java.awt.image.ColorModel;
+import java.awt.image.DirectColorModel;
+import java.awt.image.IndexColorModel;
+import java.awt.image.WritableRaster;
+
+import org.eclipse.swt.*;
+import org.eclipse.swt.widgets.*;
+import org.eclipse.swt.graphics.*;
+
+public class Snippet156 {
+	
+static BufferedImage convertToAWT(ImageData data) {
+	ColorModel colorModel = null;
+	PaletteData palette = data.palette;
+	if (palette.isDirect) {
+		colorModel = new DirectColorModel(data.depth, palette.redMask, palette.greenMask, palette.blueMask);
+		BufferedImage bufferedImage = new BufferedImage(colorModel, colorModel.createCompatibleWritableRaster(data.width, data.height), false, null);
+		WritableRaster raster = bufferedImage.getRaster();
+		int[] pixelArray = new int[3];
+		for (int y = 0; y < data.height; y++) {
+			for (int x = 0; x < data.width; x++) {
+				int pixel = data.getPixel(x, y);
+				RGB rgb = palette.getRGB(pixel);
+				pixelArray[0] = rgb.red;
+				pixelArray[1] = rgb.green;
+				pixelArray[2] = rgb.blue;
+				raster.setPixels(x, y, 1, 1, pixelArray);
+			}
+		}
+		return bufferedImage;
+	} else {
+		RGB[] rgbs = palette.getRGBs();
+		byte[] red = new byte[rgbs.length];
+		byte[] green = new byte[rgbs.length];
+		byte[] blue = new byte[rgbs.length];
+		for (int i = 0; i < rgbs.length; i++) {
+			RGB rgb = rgbs[i];
+			red[i] = (byte)rgb.red;
+			green[i] = (byte)rgb.green;
+			blue[i] = (byte)rgb.blue;
+		}
+		if (data.transparentPixel != -1) {
+			colorModel = new IndexColorModel(data.depth, rgbs.length, red, green, blue, data.transparentPixel);
+		} else {
+			colorModel = new IndexColorModel(data.depth, rgbs.length, red, green, blue);
+		}		
+		BufferedImage bufferedImage = new BufferedImage(colorModel, colorModel.createCompatibleWritableRaster(data.width, data.height), false, null);
+		WritableRaster raster = bufferedImage.getRaster();
+		int[] pixelArray = new int[1];
+		for (int y = 0; y < data.height; y++) {
+			for (int x = 0; x < data.width; x++) {
+				int pixel = data.getPixel(x, y);
+				pixelArray[0] = pixel;
+				raster.setPixel(x, y, pixelArray);
+			}
+		}
+		return bufferedImage;
+	}
+}
+
+static ImageData convertToSWT(BufferedImage bufferedImage) {
+	if (bufferedImage.getColorModel() instanceof DirectColorModel) {
+		DirectColorModel colorModel = (DirectColorModel)bufferedImage.getColorModel();
+		PaletteData palette = new PaletteData(colorModel.getRedMask(), colorModel.getGreenMask(), colorModel.getBlueMask());
+		ImageData data = new ImageData(bufferedImage.getWidth(), bufferedImage.getHeight(), colorModel.getPixelSize(), palette);
+		WritableRaster raster = bufferedImage.getRaster();
+		int[] pixelArray = new int[3];
+		for (int y = 0; y < data.height; y++) {
+			for (int x = 0; x < data.width; x++) {
+				raster.getPixel(x, y, pixelArray);
+				int pixel = palette.getPixel(new RGB(pixelArray[0], pixelArray[1], pixelArray[2]));
+				data.setPixel(x, y, pixel);
+			}
+		}		
+		return data;		
+	} else if (bufferedImage.getColorModel() instanceof IndexColorModel) {
+		IndexColorModel colorModel = (IndexColorModel)bufferedImage.getColorModel();
+		int size = colorModel.getMapSize();
+		byte[] reds = new byte[size];
+		byte[] greens = new byte[size];
+		byte[] blues = new byte[size];
+		colorModel.getReds(reds);
+		colorModel.getGreens(greens);
+		colorModel.getBlues(blues);
+		RGB[] rgbs = new RGB[size];
+		for (int i = 0; i < rgbs.length; i++) {
+			rgbs[i] = new RGB(reds[i] & 0xFF, greens[i] & 0xFF, blues[i] & 0xFF);
+		}
+		PaletteData palette = new PaletteData(rgbs);
+		ImageData data = new ImageData(bufferedImage.getWidth(), bufferedImage.getHeight(), colorModel.getPixelSize(), palette);
+		data.transparentPixel = colorModel.getTransparentPixel();
+		WritableRaster raster = bufferedImage.getRaster();
+		int[] pixelArray = new int[1];
+		for (int y = 0; y < data.height; y++) {
+			for (int x = 0; x < data.width; x++) {
+				raster.getPixel(x, y, pixelArray);
+				data.setPixel(x, y, pixelArray[0]);
+			}
+		}
+		return data;
+	}
+	return null;
+}
+
+static ImageData createSampleImage(Display display) {
+	Image image = new Image(display, 100, 100);
+	Rectangle bounds = image.getBounds();
+	GC gc = new GC(image);
+	gc.setBackground(display.getSystemColor(SWT.COLOR_BLUE));
+	gc.fillRectangle(bounds);
+	gc.setBackground(display.getSystemColor(SWT.COLOR_GREEN));
+	gc.fillOval(0, 0, bounds.width, bounds.height);
+	gc.setForeground(display.getSystemColor(SWT.COLOR_RED));
+	gc.drawLine(0, 0, bounds.width, bounds.height);
+	gc.drawLine(bounds.width, 0, 0, bounds.height);
+	gc.dispose();
+	ImageData data = image.getImageData();
+	image.dispose();
+	return data;
+}
+
+public static void main(String[] args) {
+	Display display = new Display();
+	Shell shell = new Shell(display);
+	shell.setText("SWT Image");
+	ImageData data;
+	if (args.length > 0) {
+		String fileName = args[0];
+		data = new ImageData(fileName);
+	} else {
+		data = createSampleImage(display);
+	}
+	final Image swtImage = new Image(display, data);
+	final BufferedImage awtImage = convertToAWT(data);
+	final Image swtImage2 = new Image(display, convertToSWT(awtImage));
+	shell.addListener(SWT.Paint, new Listener() {
+		public void handleEvent(Event e) {
+			int y = 10;
+			if (swtImage != null) {
+				e.gc.drawImage(swtImage, 10, y);
+				y += swtImage.getBounds().height + 10;
+			}
+			if (swtImage2 != null) {
+				e.gc.drawImage(swtImage2, 10, y);
+			}
+		}
+	});
+	Frame frame = new Frame() {
+		public void paint(Graphics g) {
+			Insets insets = getInsets();
+			if (awtImage != null) {
+				g.drawImage(awtImage, 10 + insets.left, 10 + insets.top, null);
+			}
+		}
+	};
+	frame.setTitle("AWT Image");
+	shell.setLocation(50, 50);
+	Rectangle bounds = swtImage.getBounds();
+	shell.setSize(bounds.width + 50, bounds.height * 2 + 100);
+	Point size = shell.getSize();
+	Point location = shell.getLocation();
+	Insets insets = frame.getInsets();
+	frame.setLocation(location.x + size.x + 10, location.y);
+	frame.setSize(size.x - (insets.left + insets.right), size.y - (insets.top + insets.bottom));
+	frame.setVisible(true);	
+	shell.open();
+	while (!shell.isDisposed()) {
+		if (!display.readAndDispatch()) display.sleep();
+	}
+	if (swtImage != null) swtImage.dispose();
+	if (swtImage2 != null) swtImage.dispose();
+	frame.dispose();
+	System.exit(0);
+}
+}