The vast and the sweeping. Modified the tile framework such that tiles no

longer provide access to their underlying image (they actually still do,
but not in the normal course of affairs). This will allow us to use
"trimmed" tiles which are trimmed to the smallest rectangle that contains
the non-transparent pixels in a tile image, which will shrink up our
components and other tiles a great deal.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1339 542714f4-19e9-0310-aa3c-eee0fc999fb1

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

@@ -0,0 +1,54 @@
+//
+// $Id: TrimmedTileSet.java,v 1.1 2002/05/06 18:08:32 mdb Exp $
+
+package com.threerings.media.tile;
+
+import java.awt.Image;
+import java.awt.Rectangle;
+
+/**
+ * Contains the necessary information to create a set of trimmed tiles
+ * from a base image and the associated trim metrics.
+ */
+public class TrimmedTileSet extends TileSet
+{
+    // documentation inherited
+    public int getTileCount ()
+    {
+        return _obounds.length;
+    }
+
+    /**
+     * Provides this tileset with access to the trimmed tile metrics. This
+     * generally only is called when generating a trimmed tileset from a
+     * regular tileset.
+     */
+    public void setTileMetrics (Rectangle[] obounds, Rectangle[] tbounds)
+    {
+        _obounds = obounds;
+        _tbounds = tbounds;
+    }
+
+    // documentation inherited
+    protected Rectangle computeTileBounds (int tileIndex, Image tilesetImage)
+    {
+        // N/A
+        return null;
+    }
+
+    // documentation inherited
+    protected Tile createTile (int tileIndex, Image tilesetImage)
+    {
+        return new TrimmedTile(
+            tilesetImage, _obounds[tileIndex], _tbounds[tileIndex]);
+    }
+
+    /** The width and height of the untrimmed tile, and the x and y offset
+     * of the trimmed image within our tileset image. */
+    protected Rectangle[] _obounds;
+
+    /** The width and height of the trimmed image and the x and y offset
+     * within the untrimmed image at which the trimmed image should be
+     * rendered. */
+    protected Rectangle[] _tbounds;
+}