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/FlipFrameManager.java

@@ -0,0 +1,101 @@
+//
+// $Id: FlipFrameManager.java 4181 2006-06-07 21:54:12Z mdb $
+//
+// 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;
+
+import java.awt.AWTException;
+import java.awt.BufferCapabilities;
+import java.awt.Graphics2D;
+import java.awt.ImageCapabilities;
+import java.awt.Rectangle;
+import java.awt.image.BufferStrategy;
+
+/**
+ * A {@link FrameManager} extension that uses a flip-buffer (via {@link
+ * BufferStrategy} to do its rendering.
+ */
+public class FlipFrameManager extends FrameManager
+{
+    // documentation inherited
+    protected void paint (long tickStamp)
+    {
+        // create our buffer strategy if we don't already have one
+        if (_bufstrat == null) {
+            BufferCapabilities cap = new BufferCapabilities(
+                new ImageCapabilities(true), new ImageCapabilities(true),
+                BufferCapabilities.FlipContents.COPIED);
+            try {
+                _window.createBufferStrategy(2, cap);
+            } catch (AWTException ae) {
+                Log.warning("Failed creating flip bufstrat: " + ae + ".");
+                // fall back to one without custom capabilities
+                _window.createBufferStrategy(2);
+            }
+            _bufstrat = _window.getBufferStrategy();
+        }
+
+        // start out assuming we can do an incremental render
+        boolean incremental = true;
+
+        do {
+            Graphics2D gfx = null;
+            try {
+                gfx = (Graphics2D)_bufstrat.getDrawGraphics();
+
+                // dirty everything if we're not incrementally rendering
+                if (!incremental) {
+                    Log.info("Doing non-incremental render; contents lost " +
+                             "[lost=" + _bufstrat.contentsLost() +
+                             ", rest=" + _bufstrat.contentsRestored() + "].");
+                    _root.getRootPane().revalidate();
+                    _root.getRootPane().repaint();
+                }
+
+                // request to paint our participants and components and bail
+                // if they paint nothing
+                if (!paint(gfx)) {
+                    return;
+                }
+
+                // flip our buffer to visible
+                _bufstrat.show();
+
+                // if we loop through a second time, we'll need to rerender
+                // everything
+                incremental = false;
+
+            } finally {
+                if (gfx != null) {
+                    gfx.dispose();
+                }
+            }
+        } while (_bufstrat.contentsLost());
+    }
+
+    // documentation inherited
+    protected void restoreFromBack (Rectangle dirty)
+    {
+        // nothing doing
+    }
+
+    /** The buffer strategy used to do our rendering. */
+    protected BufferStrategy _bufstrat;
+}