New type of mirage that simply draws a list of mirages one on top of the other(s).

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4090 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/image/CompositeMirage.java

@@ -0,0 +1,93 @@
+package com.threerings.media.image;
+
+import java.awt.Graphics2D;
+import java.awt.image.BufferedImage;
+
+public class CompositeMirage implements Mirage
+{
+    public CompositeMirage (Mirage[] mirages)
+    {
+        _mirages = mirages;
+    }
+
+    public CompositeMirage (Mirage mirage1, Mirage mirage2)
+    {
+        _mirages = new Mirage[]{mirage1, mirage2};
+    }
+
+    // documentation inherited from interface Mirage
+    public long getEstimatedMemoryUsage ()
+    {
+        // Return the total memory of our component mirages.
+        long mem = 0;
+        for (Mirage m : _mirages) {
+            mem += m.getEstimatedMemoryUsage();
+        }
+        
+        return mem;
+    }
+
+    // documentation inherited from interface Mirage
+    public int getHeight ()
+    {
+        // Return the maximal height of our component mirages.
+        int height = 0;
+        for (Mirage m : _mirages) {
+            height = Math.max(height, m.getHeight());
+        }
+
+        return height;
+    }
+
+    // documentation inherited from interface Mirage
+    public int getWidth ()
+    {
+        // Return the maximal width of our component mirages.
+        int width = 0;
+        for (Mirage m : _mirages) {
+            width = Math.max(width, m.getWidth());
+        }
+
+        return width;
+    }
+
+    // documentation inheritd from interface Mirage
+    public BufferedImage getSnapshot ()
+    {
+        BufferedImage img = new BufferedImage(getWidth(), getHeight(),
+            BufferedImage.TYPE_INT_ARGB);
+        Graphics2D gfx = img.createGraphics();
+
+        for (Mirage m : _mirages) {
+            BufferedImage snap = m.getSnapshot();
+            gfx.drawImage(snap, 0, 0, snap.getWidth(), snap.getHeight(), null);
+        }
+
+        return img;
+    }
+
+    // documentation inheritd from interface Mirage
+    public boolean hitTest (int x, int y)
+    {
+        // If it hits any of our mirages, it hits us.
+        for (Mirage m : _mirages) {
+            if (m.hitTest(x, y)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    // documentation inheritd from interface Mirage
+    public void paint (Graphics2D gfx, int x, int y)
+    {
+        // Paint everyone.
+        for (Mirage m : _mirages) {
+            m.paint(gfx, x, y);
+        }
+    }
+
+    /** All the component mirages we're made up of. */
+    protected Mirage[] _mirages;
+}