Trimmed objects! The weight loss program proceeds apace.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1528 542714f4-19e9-0310-aa3c-eee0fc999fb1

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

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+//
+// $Id: TrimmedObjectTileSet.java,v 1.1 2002/06/21 18:53:13 mdb Exp $
+
+package com.threerings.media.tile;
+
+import java.awt.Image;
+import java.awt.Rectangle;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import com.samskivert.util.StringUtil;
+
+import com.threerings.media.Log;
+import com.threerings.media.tile.util.TileSetTrimmer;
+
+/**
+ * An object tileset in which the objects have been trimmed to the
+ * smallest possible images that still contain all of their
+ * non-transparent pixels. The objects' origins are adjusted so that the
+ * objects otherwise behave exactly as the untrimmed objects and are thus
+ * interchangeable (and more memory efficient).
+ */
+public class TrimmedObjectTileSet extends TileSet
+{
+    // documentation inherited
+    public int getTileCount ()
+    {
+        return _bounds.length;
+    }
+
+    // documentation inherited
+    protected Rectangle computeTileBounds (int tileIndex, Image tilesetImage)
+    {
+        // N/A
+        return null;
+    }
+
+    // documentation inherited
+    protected Tile createTile (int tileIndex, Image tilesetImage)
+    {
+        ObjectTile tile = new ObjectTile(tilesetImage, _bounds[tileIndex]);
+        tile.setBase(_ometrics[tileIndex].width, _ometrics[tileIndex].height);
+        tile.setOrigin(_ometrics[tileIndex].x, _ometrics[tileIndex].y);
+        return tile;
+    }
+
+    // documentation inherited
+    protected void toString (StringBuffer buf)
+    {
+        super.toString(buf);
+	buf.append(", ometrics=").append(StringUtil.toString(_ometrics));
+	buf.append(", bounds=").append(StringUtil.toString(_bounds));
+    }
+
+    /**
+     * Creates a trimmed object tileset from the supplied source object
+     * tileset. The image path must be set by hand to the appropriate path
+     * based on where the image data that is written to the
+     * <code>destImage</code> parameter is actually stored on the file
+     * system. See {@link TileSetTrimmer#trimTileSet} for further
+     * information.
+     */
+    public static TrimmedObjectTileSet trimObjectTileSet (
+        ObjectTileSet source, OutputStream destImage)
+        throws IOException
+    {
+        final TrimmedObjectTileSet tset = new TrimmedObjectTileSet();
+        tset.setName(source.getName());
+        int tcount = source.getTileCount();
+
+        // create our metrics arrays
+        tset._bounds = new Rectangle[tcount];
+        tset._ometrics = new Rectangle[tcount];
+
+        // fill in the original object metrics
+        for (int ii = 0; ii < tcount; ii++) {
+            tset._ometrics[ii] = new Rectangle();
+            if (source._xorigins != null) { 
+                tset._ometrics[ii].x = source._xorigins[ii];
+            }
+            if (source._yorigins != null) { 
+                tset._ometrics[ii].y = source._yorigins[ii];
+            }
+            tset._ometrics[ii].width = source._owidths[ii];
+            tset._ometrics[ii].height = source._oheights[ii];
+        }
+
+        // create the trimmed tileset image
+        TileSetTrimmer.TrimMetricsReceiver tmr =
+            new TileSetTrimmer.TrimMetricsReceiver() {
+                public void trimmedTile (int tileIndex, int imageX, int imageY,
+                                         int trimX, int trimY,
+                                         int trimWidth, int trimHeight) {
+                    tset._ometrics[tileIndex].x -= trimX;
+                    tset._ometrics[tileIndex].y -= trimY;
+                    tset._bounds[tileIndex] =
+                        new Rectangle(imageX, imageY, trimWidth, trimHeight);
+                }
+            };
+        TileSetTrimmer.trimTileSet(source, destImage, tmr);
+
+//         Log.info("Trimmed object tileset " +
+//                  "[bounds=" + StringUtil.toString(tset._bounds) +
+//                  ", metrics=" + StringUtil.toString(tset._ometrics) + "].");
+
+        return tset;
+    }
+
+    /** Contains the width and height of each object tile and the offset
+     * into the tileset image of their image data. */
+    protected Rectangle[] _bounds;
+
+    /** Contains the origin offset for each object tile and the object
+     * footprint width and height (in tile units). */
+    protected Rectangle[] _ometrics;
+}