com.sun.glass.ui.monocle.X11AcceleratedScreen Maven / Gradle / Ivy
/*
* Copyright (c) 2014, 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
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*/
package com.sun.glass.ui.monocle;
import java.security.AccessController;
import java.security.PrivilegedAction;
/** Provide X11 implementation of AcceleratedScreen
*
*/
class X11AcceleratedScreen extends AcceleratedScreen {
private static X xLib = X.getX();
private X.XDisplay nativeDisplay;
X11AcceleratedScreen(int[] attributes) throws GLException {
super(attributes);
}
@Override
protected long platformGetNativeDisplay() {
/* There is a bug in the graphics drivers for the mali chip on the
* ODROID-U3. EGL improperly treats the XDisplay pointer as a number
* and rejects negative values. A pointer whose address has the high-bit
* set will be interpreted as a negative number and rejected. The
* (slightly distasteful) workaround is to use mmap to allocate a chunk
* of memory in a location whose address does NOT have the high bit set
* and copy the XDisplay pointer there before passing it into EGL.
* This workaround can be removed when the bug in the drivers is fixed.
*/
if (nativeDisplay == null) {
boolean doMaliWorkaround =
AccessController.doPrivileged(
(PrivilegedAction) () ->
Boolean.getBoolean(
"monocle.maliSignedStruct"));
X.XDisplay display = new X.XDisplay(xLib.XOpenDisplay(null));
if (doMaliWorkaround) {
long address = 0x7000000;
nativeDisplay = new X.XDisplay(
ls.mmap(address, display.sizeof(),
LinuxSystem.PROT_READ | LinuxSystem.PROT_WRITE,
LinuxSystem.MAP_PRIVATE
| LinuxSystem.MAP_ANONYMOUS,
-1, 0)
);
ls.memcpy(nativeDisplay.p, display.p, display.sizeof());
} else {
nativeDisplay = display;
}
}
return nativeDisplay.p;
}
@Override
protected long platformGetNativeWindow() {
return NativePlatformFactory.getNativePlatform()
.getScreen().getNativeHandle();
}
@Override
public boolean swapBuffers() {
/* Since we are accessing X from multiple threads, we need to lock the
* display before we swap and potentially move the cursor.
*/
xLib.XLockDisplay(nativeDisplay.p);
super.swapBuffers();
NativeCursor cursor = NativePlatformFactory.getNativePlatform().getCursor();
if (cursor instanceof X11WarpingCursor) {
((X11WarpingCursor) cursor).warp();
}
xLib.XUnlockDisplay(nativeDisplay.p);
return true;
}
}