diff -r bb0bd0cff018 -r a95707a39ff5 src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MetalLayer.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MetalLayer.h	Wed Feb 20 17:00:40 2019 +0530
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2019, 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 MetalLayer_h_Included
+#define MetalLayer_h_Included
+
+#import <JavaNativeFoundation/JavaNativeFoundation.h>
+#import <QuartzCore/CAMetalLayer.h>
+#import <Metal/Metal.h>
+
+
+@interface MetalLayer : CAMetalLayer
+{
+@private
+    JNFWeakJObjectWrapper *javaLayer;
+
+    // intermediate buffer, used the RQ lock to synchronize
+    id<MTLTexture> mtlTexture;
+    //GLenum target;
+    float textureWidth;
+    float textureHeight;
+#ifdef REMOTELAYER
+    //CGLLayer *parentLayer;
+    //CGLLayer *remoteLayer;
+    //NSObject<JRSRemoteLayer> *jrsRemoteLayer;
+#endif /* REMOTELAYER */
+}
+
+@property (nonatomic, retain) JNFWeakJObjectWrapper *javaLayer;
+@property (readwrite, assign) float textureWidth;
+@property (readwrite, assign) float textureHeight;
+@property (readwrite, assign) id<MTLTexture> mtlTexture;
+@property (readwrite, assign) id<MTLLibrary> mtlLibrary;
+@property (readwrite, assign) MTLRenderPipelineDescriptor* mtlRenderPipelineDescriptor;
+@property (readwrite, assign) id<MTLRenderPipelineState> renderPipelineState;
+//@property (readwrite, assign) id<MTLBuffer> LineVertexBuffer;
+//@property (readwrite, assign) id<MTLBuffer> QuadVertexBuffer;
+#ifdef REMOTELAYER
+//@property (nonatomic, retain) CGLLayer *parentLayer;
+//@property (nonatomic, retain) CGLLayer *remoteLayer;
+//@property (nonatomic, retain) NSObject<JRSRemoteLayer> *jrsRemoteLayer;
+#endif
+
+- (id) initWithJavaLayer:(JNFWeakJObjectWrapper *)javaLayer;
+- (void) blitTexture;
+@end
+
+
+// dummy for PoC purpose
+void MetalLayer_drawLine(float x1, float y1, float x2, float y2);
+void MetalLayer_setColor(int color);
+
+#endif /* MetalLayer_h_Included */