forked from openjdk/lanai
/
MacOSFlags.java
173 lines (151 loc) · 7 KB
/
MacOSFlags.java
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/*
* 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;
import sun.java2d.metal.MTLGraphicsConfig;
import sun.java2d.opengl.CGLGraphicsConfig;
public class MacOSFlags {
/**
* Description of command-line flags. All flags with [true|false]
* values
* metalEnabled: usage: "-Dsun.java2d.metal=[true|false]"
*/
private static boolean oglEnabled;
private static boolean oglVerbose;
private static boolean metalEnabled;
private static boolean metalVerbose;
private enum PropertyState {ENABLED, DISABLED, UNSPECIFIED};
static {
initJavaFlags();
initNativeFlags();
}
private static native boolean initNativeFlags();
private static PropertyState getBooleanProp(String p, PropertyState defaultVal) {
String propString = System.getProperty(p);
PropertyState 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 = PropertyState.ENABLED;
} else if (propString.equals("false") ||
propString.equals("f") ||
propString.equals("False") ||
propString.equals("F"))
{
returnVal = PropertyState.DISABLED;
}
}
return returnVal;
}
private static boolean isBooleanPropTrueVerbose(String p) {
String propString = System.getProperty(p);
if (propString != null) {
if (propString.equals("True") ||
propString.equals("T"))
{
return true;
}
}
return false;
}
private static void initJavaFlags() {
java.security.AccessController.doPrivileged(
(PrivilegedAction<Object>) () -> {
PropertyState oglState = getBooleanProp("sun.java2d.opengl", PropertyState.UNSPECIFIED);
PropertyState metalState = getBooleanProp("sun.java2d.metal", PropertyState.UNSPECIFIED);
// Handle invalid combinations to use the default rendering pipeline
// Current default rendering pipeline is OpenGL
// (The default can be changed to Metal in future just by toggling two states in this if condition block)
if ((oglState == PropertyState.UNSPECIFIED && metalState == PropertyState.UNSPECIFIED) ||
(oglState == PropertyState.DISABLED && metalState == PropertyState.DISABLED) ||
(oglState == PropertyState.ENABLED && metalState == PropertyState.ENABLED)) {
oglState = PropertyState.ENABLED; // Enable default pipeline
metalState = PropertyState.DISABLED; // Disable non-default pipeline
}
if (metalState == PropertyState.UNSPECIFIED) {
if (oglState == PropertyState.DISABLED) {
oglEnabled = false;
metalEnabled = true;
} else {
oglEnabled = true;
metalEnabled = false;
}
} else if (metalState == PropertyState.ENABLED) {
if (oglState == PropertyState.ENABLED) {
oglEnabled = true;
metalEnabled = false;
} else {
oglEnabled = false;
metalEnabled = true;
}
} else if (metalState == PropertyState.DISABLED) {
oglEnabled = true;
metalEnabled = false;
}
oglVerbose = isBooleanPropTrueVerbose("sun.java2d.opengl");
metalVerbose = isBooleanPropTrueVerbose("sun.java2d.metal");
if (oglEnabled && !metalEnabled) {
// Check whether OGL is available
if (!CGLGraphicsConfig.isCGLAvailable()) {
if (oglVerbose) {
System.out.println("Could not enable OpenGL pipeline (CGL not available)");
}
oglEnabled = false;
metalEnabled = MTLGraphicsConfig.isMetalAvailable();
}
} else if (metalEnabled && !oglEnabled) {
// Check whether Metal framework is available
if (!MTLGraphicsConfig.isMetalAvailable()) {
if (metalVerbose) {
System.out.println("Could not enable Metal pipeline (Metal framework not available)");
}
metalEnabled = false;
oglEnabled = CGLGraphicsConfig.isCGLAvailable();
}
}
// At this point one of the rendering pipeline must be enabled.
if (!metalEnabled && !oglEnabled) {
throw new InternalError("Error - unable to initialize any rendering pipeline.");
}
return null;
});
}
public static boolean isMetalEnabled() {
return metalEnabled;
}
public static boolean isMetalVerbose() {
return metalVerbose;
}
public static boolean isOGLEnabled() {
return oglEnabled;
}
public static boolean isOGLVerbose() {
return oglVerbose;
}
}