Added traceImage(), which will doubtless be further optimized, and it

would sure be nice to have a variant that traces the supplied image rather
than always creating a new one, and more flexibility with respect to the
alpha gradient steps might be nice, but all of that sort of thing will
just have to come later.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1950 542714f4-19e9-0310-aa3c-eee0fc999fb1

tests/src/java/com/threerings/media/util/TraceViz.java

@@ -0,0 +1,75 @@
+//
+// $Id: TraceViz.java,v 1.1 2002/11/15 09:29:40 shaper Exp $
+
+package com.threerings.media.util;
+
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Image;
+import java.awt.image.BufferedImage;
+
+import java.io.File;
+import java.io.IOException;
+
+import javax.imageio.ImageIO;
+
+import javax.swing.ImageIcon;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+
+import com.samskivert.swing.VGroupLayout;
+import com.samskivert.swing.util.SwingUtil;
+
+import com.threerings.media.Log;
+
+/**
+ * Simple application for testing image trace functionality.
+ */
+public class TraceViz
+{
+    public TraceViz (String[] args)
+        throws IOException
+    {
+        _frame = new JFrame();
+        _frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+
+        JPanel content = (JPanel)_frame.getContentPane();
+        content.setBackground(Color.white);
+        content.setLayout(new VGroupLayout());
+
+        // create a compatible image
+        BufferedImage image = ImageIO.read(new File(args[0]));
+        BufferedImage cimage = ImageUtil.createImage(
+            image.getWidth(null), image.getHeight(null));
+        Graphics g = cimage.getGraphics();
+        g.drawImage(image, 0, 0, null);
+        g.dispose();
+
+        Image timage = ImageUtil.createTracedImage(
+            cimage, Color.red, 5, 0.4f, 0.1f);
+        content.add(new JLabel(new ImageIcon(cimage)));
+        content.add(new JLabel(new ImageIcon(timage)));
+    }
+
+    public void run ()
+    {
+        _frame.pack();
+        SwingUtil.centerWindow(_frame);
+        _frame.show();
+    }
+
+    public static void main (String[] args)
+    {
+        try {
+            TraceViz app = new TraceViz(args);
+            app.run();
+
+        } catch (Exception e) {
+            Log.warning("Failed to run application: " + e);
+            Log.logStackTrace(e);
+        }
+    }
+
+    protected JFrame _frame;
+}