--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLGraphicsConfig.h	Fri Jun 21 12:08:37 2019 +0530
@@ -0,0 +1,80 @@
+/*
+ * 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.
+ */
+
+#ifndef MTLGraphicsConfig_h_Included
+#define MTLGraphicsConfig_h_Included
+
+#import "jni.h"
+#import "MTLSurfaceDataBase.h"
+#import "MTLContext.h"
+#import <Cocoa/Cocoa.h>
+#import <Metal/Metal.h>
+
+
+@interface MTLGraphicsConfigUtil : NSObject {}
++ (void) _getMTLConfigInfo: (NSMutableArray *)argValue;
+@end
+
+// REMIND: Using an NSOpenGLPixelBuffer as the scratch surface has been
+// problematic thus far (seeing garbage and flickering when switching
+// between an NSView and the scratch surface), so the following enables
+// an alternate codepath that uses a hidden NSWindow/NSView as the scratch
+// surface, for the purposes of making a context current in certain
+// situations.  It appears that calling [NSOpenGLContext setView] too
+// frequently contributes to the bad behavior, so we should try to avoid
+// switching to the scratch surface whenever possible.
+
+/* Do we need this if we are using all off-screen drawing ? */
+#define USE_NSVIEW_FOR_SCRATCH 1
+
+/* Uncomment to have an additional CAOGLLayer instance tied to
+ * each instance, which can be used to test remoting the layer
+ * to an out of process window. The additional layer is needed
+ * because a layer can only be attached to one context (view/window).
+ * This is only for testing purposes and can be removed if/when no
+ * longer needed.
+ */
+
+
+/**
+ * The MTLGraphicsConfigInfo structure contains information specific to a
+ * given CGLGraphicsConfig (pixel format).
+ *
+ *     jint screen;
+ * The screen and PixelFormat for the associated CGLGraphicsConfig.
+ *
+ *     NSOpenGLPixelFormat *pixfmt;
+ * The pixel format of the native NSOpenGL context.
+ *
+ *     MTLContext *context;
+ * The context associated with this CGLGraphicsConfig.
+ */
+typedef struct _MTLGraphicsConfigInfo {
+    jint                screen;
+    NSOpenGLPixelFormat *pixfmt;
+    MTLContext          *context;
+} MTLGraphicsConfigInfo;
+
+#endif /* MTLGraphicsConfig_h_Included */