diff -r 1612dbcec451 -r 639991d0808a java/cewolf-1.0/src/main/java/de/laures/cewolf/util/RenderingHelper.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/java/cewolf-1.0/src/main/java/de/laures/cewolf/util/RenderingHelper.java	Sat Feb 28 21:31:02 2009 +0100
@@ -0,0 +1,100 @@
+/* ================================================================
+ * Cewolf : Chart enabling Web Objects Framework
+ * ================================================================
+ *
+ * Project Info:  http://cewolf.sourceforge.net
+ * Project Lead:  Guido Laures (guido@laures.de);
+ *
+ * (C) Copyright 2002, by Guido Laures
+ *
+ * This library is free software; you can redistribute it and/or modify it under the terms
+ * of the GNU Lesser General Public License as published by the Free Software Foundation;
+ * either version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with this
+ * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+package de.laures.cewolf.util;
+
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.Graphics;
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.util.Enumeration;
+import java.util.StringTokenizer;
+
+import com.sun.image.codec.jpeg.JPEGCodec;
+import com.sun.image.codec.jpeg.JPEGEncodeParam;
+import com.sun.image.codec.jpeg.JPEGImageEncoder;
+
+/**
+ * Some methods to render messages or exceptions into an image.
+ * @author glaures
+ */
+public class RenderingHelper {
+	
+	private final static int PADDING_X = 5;
+	
+	public static String renderMessage(String msg, int width, int height, OutputStream out) throws IOException {
+		BufferedImage image = ImageHelper.createImage(width, height);
+		Graphics gr = image.getGraphics();
+		gr.setColor(Color.white);
+		gr.fillRect(0, 0, width, height);
+		gr.setColor(Color.black);
+		gr.drawString(msg, PADDING_X, height/2 - 7);
+		JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
+		JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(image);
+		param.setQuality(1.0f, true);
+		encoder.encode(image, param);
+		return "image/jpeg";
+	}
+    
+	public static String renderException(Throwable ex, int width, int height, OutputStream out) throws IOException {
+		BufferedImage image = ImageHelper.createImage(width, height);
+		Graphics gr = image.getGraphics();
+		gr.setColor(Color.white);
+		gr.fillRect(0, 0, width, height);
+		gr.setColor(Color.red);
+		gr.drawString(ex.getClass().getName() + " raised:", PADDING_X, 15);
+		gr.drawString(String.valueOf(ex.getMessage()), PADDING_X, 30);
+		gr.setColor(Color.black);
+		Font stFont = gr.getFont().deriveFont(9f);
+		gr.setFont(stFont);
+		drawStackTrace(gr, PADDING_X, 50, ex);
+		JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
+		JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(image);
+		param.setQuality(1.0f, true);
+		encoder.encode(image, param);
+		return "image/jpeg";
+	}
+    
+    private static void drawStackTrace(Graphics gr, int x, int y, Throwable ex) {
+        final int linePadding = 4;
+        int lineHeight = gr.getFont().getSize() + linePadding;
+        int currY = y;
+        Enumeration lines = new StringTokenizer(getStackTrace(ex), "\n", false);
+        while (lines.hasMoreElements()) {
+            gr.drawString(((String)lines.nextElement()).trim(), x, currY);
+            currY += lineHeight;
+        }
+    }
+    
+    private static String getStackTrace(Throwable t) {
+        StringWriter sw = new StringWriter();
+        PrintWriter pw = new PrintWriter(sw);
+        t.printStackTrace(pw);
+        pw.close();
+        return sw.getBuffer().toString();
+    }
+    
+}