Major media subsystem revamp:

- All images are loaded through the image manager
- Architected to allow the use of prepared or unprepared images (and
  volatile images when the day comes that they support alpha)
- Tunable caches for images and tiles
- Resource manager caches unpacked resources on the filesystem
- Various and sundry other cleanups


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@2116 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/tile/SimpleCachingImageProvider.java

@@ -0,0 +1,56 @@
+//
+// $Id: SimpleCachingImageProvider.java,v 1.1 2003/01/13 22:49:46 mdb Exp $
+
+package com.threerings.media.tile;
+
+import java.awt.Rectangle;
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+
+import com.samskivert.util.LRUHashMap;
+
+import com.threerings.media.Log;
+import com.threerings.media.image.Colorization;
+import com.threerings.media.image.Mirage;
+
+/**
+ * An image provider that can be used by command line tools to load images
+ * and provide them to tilesets when doing things like preprocessing
+ * tileset images.
+ */
+public abstract class SimpleCachingImageProvider implements ImageProvider
+{
+    // documentation inherited from interface
+    public BufferedImage getTileSetImage (String path, Colorization[] zations)
+    {
+        BufferedImage image = (BufferedImage)_cache.get(path);
+        if (image == null) {
+            try {
+                image = loadImage(path);
+                _cache.put(path, image);
+            } catch (IOException ioe) {
+                Log.warning("Failed to load image [path=" + path +
+                            ", ioe=" + ioe + "].");
+            }
+        }
+        return image;
+    }
+
+    // documentation inherited from interface
+    public Mirage getTileImage (String path, Rectangle bounds,
+                                Colorization[] zations)
+    {
+        // since we're just doing batch processing, we don't prepare
+        // images for the screen
+        throw new UnsupportedOperationException();
+    }
+
+    /**
+     * Derived classes must implement this method to actually load the raw
+     * source images.
+     */
+    protected abstract BufferedImage loadImage (String path)
+        throws IOException;
+
+    protected LRUHashMap _cache = new LRUHashMap(10);
+}