--- /dev/null	2019-06-14 14:38:10.000000000 +0530
+++ new/src/java.desktop/macosx/classes/sun/java2d/metal/MTLMaskBlit.java	2019-06-14 14:38:10.000000000 +0530
@@ -0,0 +1,72 @@
+/*
+ * 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.metal;
+
+import sun.java2d.SurfaceData;
+import sun.java2d.loops.CompositeType;
+import sun.java2d.loops.GraphicsPrimitive;
+import sun.java2d.loops.GraphicsPrimitiveMgr;
+import sun.java2d.loops.SurfaceType;
+import sun.java2d.pipe.BufferedMaskBlit;
+import sun.java2d.pipe.Region;
+
+import java.awt.*;
+
+import static sun.java2d.loops.CompositeType.SrcNoEa;
+import static sun.java2d.loops.CompositeType.SrcOver;
+import static sun.java2d.loops.SurfaceType.*;
+
+class MTLMaskBlit extends BufferedMaskBlit {
+
+    static void register() {
+        GraphicsPrimitive[] primitives = {
+                new MTLMaskBlit(IntArgb,    SrcOver),
+                new MTLMaskBlit(IntArgbPre, SrcOver),
+                new MTLMaskBlit(IntRgb,     SrcOver),
+                new MTLMaskBlit(IntRgb,     SrcNoEa),
+                new MTLMaskBlit(IntBgr,     SrcOver),
+                new MTLMaskBlit(IntBgr,     SrcNoEa),
+        };
+        GraphicsPrimitiveMgr.register(primitives);
+    }
+
+    private MTLMaskBlit(SurfaceType srcType,
+                        CompositeType compType)
+    {
+        super(MTLRenderQueue.getInstance(),
+                srcType, compType, MTLSurfaceData.MTLSurface);
+    }
+
+    @Override
+    protected void validateContext(SurfaceData dstData,
+                                   Composite comp, Region clip)
+    {
+        MTLSurfaceData oglDst = (MTLSurfaceData)dstData;
+        MTLContext.validateContext(oglDst, oglDst,
+                clip, comp, null, null, null,
+                MTLContext.NO_CONTEXT_FLAGS);
+    }
+}