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
2006-06-23 18:07:28 +00:00
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+//
+// $Id: ModeUtil.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.util;
+
+import java.awt.DisplayMode;
+import java.awt.GraphicsDevice;
+
+import java.util.Comparator;
+import java.util.TreeSet;
+
+/**
+ * Display mode related utilities.
+ */
+public class ModeUtil
+{
+    /**
+     * Gets a display mode that matches the specified parameters. The
+     * screen resolution must match the specified resolution exactly, the
+     * specified desired depth will be used if it is available, and if
+     * not, the highest depth greater than or equal to the specified
+     * minimum depth is used. The highest refresh rate available for the
+     * desired mode is also used.
+     */
+    public static DisplayMode getDisplayMode (
+        GraphicsDevice gd, int width, int height,
+        int desiredDepth, int minimumDepth)
+    {
+        DisplayMode[] modes = gd.getDisplayModes();
+        final int ddepth = desiredDepth;
+
+        // we sort modes in order of desirability
+        Comparator mcomp = new Comparator () {
+            public int compare (Object o1, Object o2) {
+                DisplayMode m1 = (DisplayMode)o1;
+                DisplayMode m2 = (DisplayMode)o2;
+                int bd1 = m1.getBitDepth(), bd2 = m2.getBitDepth();
+                int rr1 = m1.getRefreshRate(), rr2 = m2.getRefreshRate();
+
+                // prefer the desired depth
+                if (bd1 == ddepth && bd2 != ddepth) {
+                    return -1;
+                } else if (bd2 == ddepth && bd1 != ddepth) {
+                    return 1;
+                }
+
+                // otherwise prefer higher depths
+                if (bd1 != bd2) {
+                    return bd2 - bd1;
+                }
+
+                // for same bitrates, prefer higher refresh rates
+                return rr2 - rr1;
+            }
+        };
+
+        // but we only add modes that meet our minimum requirements
+        TreeSet mset = new TreeSet(mcomp);
+        for (int i = 0; i < modes.length; i++) {
+            if (modes[i].getWidth() == width &&
+                modes[i].getHeight() == height &&
+                modes[i].getBitDepth() >= minimumDepth &&
+                modes[i].getRefreshRate() <= 75) {
+                mset.add(modes[i]);
+            }
+        }
+
+        return (mset.size() > 0) ? (DisplayMode)mset.first() : null;
+    }
+
+    /**
+     * Returns a string representation of the supplied display mode.
+     */
+    public static String toString (DisplayMode mode)
+    {
+        return "[width=" + mode.getWidth() +
+            ", height=" + mode.getHeight() +
+            ", depth=" + mode.getBitDepth() +
+            ", refresh=" + mode.getRefreshRate() + "]";
+    }
+}