Behold, Nenya, Ring of Water and repository for our media and animation related

goodies, both Java 2D and LWJGL/JME 3D.


git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@1 ed5b42cb-e716-0410-a449-f6a68f950b19

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

@@ -0,0 +1,104 @@
+//
+// $Id: CachedVolatileMirage.java 4191 2006-06-13 22:42:20Z ray $
+//
+// Narya library - tools for developing networked games
+// Copyright (C) 2002-2004 Three Rings Design, Inc., All Rights Reserved
+// http://www.threerings.net/code/narya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.media.image;
+
+import java.awt.Graphics;
+import java.awt.Rectangle;
+import java.awt.Transparency;
+import java.awt.image.BufferedImage;
+
+import com.threerings.media.Log;
+
+/**
+ * A mirage implementation which allows the image to be maintained in
+ * video memory and refetched from the image manager in the event that our
+ * target screen resolution changes or we are flushed from video memory
+ * for some other reason.
+ *
+ * <p> These objects are never created directly, but always obtained from
+ * the {@link ImageManager}.
+ */
+public class CachedVolatileMirage extends VolatileMirage
+{
+    /**
+     * Creates a mirage with the supplied regeneration informoation and
+     * prepared image.
+     */
+    protected CachedVolatileMirage (
+        ImageManager imgr, ImageManager.ImageKey source,
+        Rectangle bounds, Colorization[] zations)
+    {
+        super(imgr, bounds);
+
+        _source = source;
+        _zations = zations;
+
+        // create our volatile image for the first time
+        createVolatileImage();
+    }
+
+    // documentation inherited
+    protected int getTransparency ()
+    {
+        BufferedImage source = _imgr.getImage(_source, _zations);
+        return (source == null) ? Transparency.OPAQUE :
+            source.getColorModel().getTransparency();
+    }
+
+    // documentation inherited
+    protected void refreshVolatileImage ()
+    {
+        Graphics gfx = null;
+        try {
+            BufferedImage source = _imgr.getImage(_source, _zations);
+            if (source != null) {
+                gfx = _image.getGraphics();
+                gfx.drawImage(source, -_bounds.x, -_bounds.y, null);
+            }
+
+        } catch (Exception e) {
+            Log.warning("Failure refreshing mirage " + this + ".");
+            Log.logStackTrace(e);
+
+        } finally {
+            if (gfx != null) {
+                gfx.dispose();
+            }
+        }
+    }
+
+    // documentation inherited
+    protected void toString (StringBuilder buf)
+    {
+        super.toString(buf);
+        buf.append(", key=").append(_source);
+        buf.append(", zations=").append(_zations);
+    }
+
+    /** The key that identifies the image data used to create our volatile
+     * image. */
+    protected ImageManager.ImageKey _source;
+
+    /** Optional colorizations that are applied to our source image when
+     * creating our mirage. */
+    protected Colorization[] _zations;
+}