--- /dev/null 2019-06-14 14:38:04.000000000 +0530 +++ new/src/java.desktop/macosx/classes/sun/java2d/macos/MacOSFlags.java 2019-06-14 14:38:03.000000000 +0530 @@ -0,0 +1,86 @@ +/* + * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code 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 General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package sun.java2d.macos; + +import java.security.PrivilegedAction; + +public class MacOSFlags { + + /** + * Description of command-line flags. All flags with [true|false] + * values + * metalEnabled: usage: "-Dsun.java2d.metal=[true|false]" + */ + + private static boolean metalEnabled; + + static { + initJavaFlags(); + initNativeFlags(); + } + + private static native boolean initNativeFlags(); + + private static boolean getBooleanProp(String p, boolean defaultVal) { + String propString = System.getProperty(p); + boolean returnVal = defaultVal; + if (propString != null) { + if (propString.equals("true") || + propString.equals("t") || + propString.equals("True") || + propString.equals("T") || + propString.equals("")) // having the prop name alone + { // is equivalent to true + returnVal = true; + } else if (propString.equals("false") || + propString.equals("f") || + propString.equals("False") || + propString.equals("F")) + { + returnVal = false; + } + } + return returnVal; + } + + + private static boolean getPropertySet(String p) { + String propString = System.getProperty(p); + return (propString != null) ? true : false; + } + + private static void initJavaFlags() { + java.security.AccessController.doPrivileged( + (PrivilegedAction) () -> { + metalEnabled = getBooleanProp("sun.java2d.metal", false); + return null; + }); + } + + public static boolean isMetalEnabled() { + return metalEnabled; + } +}