--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLRenderQueue.h	Fri Jun 21 12:08:37 2019 +0530
@@ -0,0 +1,134 @@
+/*
+ * 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 MTLRenderQueue_h_Included
+#define MTLRenderQueue_h_Included
+
+#include "MTLContext.h"
+#include "MTLSurfaceData.h"
+
+/*
+ * The following macros are used to pick values (of the specified type) off
+ * the queue.
+ */
+#define NEXT_VAL(buf, type) (((type *)((buf) += sizeof(type)))[-1])
+#define NEXT_BYTE(buf)      NEXT_VAL(buf, unsigned char)
+#define NEXT_INT(buf)       NEXT_VAL(buf, jint)
+#define NEXT_FLOAT(buf)     NEXT_VAL(buf, jfloat)
+#define NEXT_BOOLEAN(buf)   (jboolean)NEXT_INT(buf)
+#define NEXT_LONG(buf)      NEXT_VAL(buf, jlong)
+#define NEXT_DOUBLE(buf)    NEXT_VAL(buf, jdouble)
+
+/*
+ * Increments a pointer (buf) by the given number of bytes.
+ */
+#define SKIP_BYTES(buf, numbytes) buf += (numbytes)
+
+/*
+ * Extracts a value at the given offset from the provided packed value.
+ */
+#define EXTRACT_VAL(packedval, offset, mask) \
+    (((packedval) >> (offset)) & (mask))
+#define EXTRACT_BYTE(packedval, offset) \
+    (unsigned char)EXTRACT_VAL(packedval, offset, 0xff)
+#define EXTRACT_BOOLEAN(packedval, offset) \
+    (jboolean)EXTRACT_VAL(packedval, offset, 0x1)
+
+/*
+ * Parameter used by the RESET_PREVIOUS_OP() convenience macro, which
+ * indicates that any "open" state (such as an unmatched glBegin() or
+ * glEnable(GL_TEXTURE_2D)) should be completed before the following operation
+ * is performed.  SET_SURFACES is an example of an operation that needs to
+ * call RESET_PREVIOUS_OP() before completing the surface change operation.
+ */
+#define MTL_STATE_RESET  -1
+
+/*
+ * Parameter passed to the CHECK_PREVIOUS_OP() macro to indicate that the
+ * following operation represents a "simple" state change.  A simple state
+ * change is one that is allowed to occur within a series of texturing
+ * operations; in other words, this type of state change can occur without
+ * first calling glDisable(GL_TEXTURE_2D).  An example of such an operation
+ * is SET_RECT_CLIP.
+ */
+#define MTL_STATE_CHANGE -2
+
+/*
+ * Parameter passed to the CHECK_PREVIOUS_OP() macro to indicate that the
+ * following operation represents an operation that uses an alpha mask,
+ * such as MTLMaskFill and MTLTR_DrawGrayscaleGlyphNoCache().
+ */
+#define MTL_STATE_MASK_OP -3
+
+/*
+ * Parameter passed to the CHECK_PREVIOUS_OP() macro to indicate that the
+ * following operation represents an operation that uses the glyph cache,
+ * such as MTLTR_DrawGrayscaleGlyphViaCache().
+ */
+#define MTL_STATE_GLYPH_OP -4
+
+/*
+ * Parameter passed to the CHECK_PREVIOUS_OP() macro to indicate that the
+ * following operation represents an operation that renders a
+ * parallelogram via a fragment program (see MTLRenderer).
+ */
+#define MTL_STATE_PGRAM_OP -5
+
+/*
+ * Initializes the "previous operation" state to its default value.
+ */
+#define INIT_PREVIOUS_OP() previousOp = MTL_STATE_RESET
+
+/*
+ * These macros now simply delegate to the CheckPreviousOp() method.
+ */
+#define CHECK_PREVIOUS_OP(op) MTLRenderQueue_CheckPreviousOp(op)
+#define RESET_PREVIOUS_OP() CHECK_PREVIOUS_OP(MTL_STATE_RESET)
+
+/*
+ * The following macros allow the caller to return (or continue) if the
+ * provided value is NULL.  (The strange else clause is included below to
+ * allow for a trailing ';' after RETURN/CONTINUE_IF_NULL() invocations.)
+ */
+#define ACT_IF_NULL(ACTION, value)         \
+    if ((value) == NULL) {                 \
+        J2dTraceLn1(J2D_TRACE_ERROR,       \
+                    "%s is null", #value); \
+        ACTION;                            \
+    } else do { } while (0)
+#define RETURN_IF_NULL(value)   ACT_IF_NULL(return, value)
+#define CONTINUE_IF_NULL(value) ACT_IF_NULL(continue, value)
+
+/*
+ * Exports.
+ */
+extern jint previousOp;
+
+MTLContext *MTLRenderQueue_GetCurrentContext();
+BMTLSDOps *MTLRenderQueue_GetCurrentDestination();
+void MTLRenderQueue_CheckPreviousOp(jint op);
+void MTLTR_DisableGlyphModeState();
+
+#endif /* MTLRenderQueue_h_Included */