--- a/src/java.desktop/macosx/native/libawt_lwawt/awt/common.h	Mon Jul 08 16:04:25 2019 +0530
+++ b/src/java.desktop/macosx/native/libawt_lwawt/awt/common.h	Mon Jul 08 17:17:28 2019 +0530
@@ -29,6 +29,7 @@
 #include <simd/SIMD.h>
 
 #define PGRAM_VERTEX_COUNT 6
+#define QUAD_VERTEX_COUNT 4
 
 enum VertexAttributes {
     VertexAttributePosition = 0,

--- a/src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLBlitLoops.m	Mon Jul 08 16:04:25 2019 +0530
+++ b/src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLBlitLoops.m	Mon Jul 08 17:17:28 2019 +0530
@@ -342,7 +342,7 @@
         J2dTraceImpl(J2D_TRACE_VERBOSE, JNI_TRUE, "MTLBlitLoops_IsoBlit [via blitEncoder]: bdst=%p [tex=%p] %dx%d | src (%d, %d, %d, %d) -> dst (%1.2f, %1.2f, %1.2f, %1.2f)", dstOps, dstTex, dstTex.width, dstTex.height, sx1, sy1, sx2, sy2, dx1, dy1, dx2, dy2);
 #endif //DEBUG
         id <MTLBlitCommandEncoder> blitEncoder = [mtlc createBlitEncoder];
-        [blitEncoder copyFromTexture:srcTex sourceSlice:0 sourceLevel:0 sourceOrigin:MTLOriginMake(sx1, sy1, 0) sourceSize:MTLSizeMake(sx2 - sx1, sy2 - sy1, 1) toTexture:dstTex destinationSlice:0 destinationLevel:0 destinationOrigin:MTLOriginMake(dx1, dy1, 0)];
+        [blitEncoder copyFromTexture:srcTex sourceSlice:0 sourceLevel:0 sourceOrigin:MTLOriginMake(sx1, sy1, 0) sourceSize:MTLSizeMake(mtlc.clipRect.width, mtlc.clipRect.height, 1) toTexture:dstTex destinationSlice:0 destinationLevel:0 destinationOrigin:MTLOriginMake(dx1, dy1, 0)];
         [blitEncoder endEncoding];
     } else {
         // TODO: support other flags

--- a/src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLRenderQueue.m	Mon Jul 08 16:04:25 2019 +0530
+++ b/src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLRenderQueue.m	Mon Jul 08 17:17:28 2019 +0530
@@ -461,7 +461,8 @@
         case sun_java2d_pipe_BufferedOpCodes_END_SHAPE_CLIP:
             {
                 //TODO
-                [mtlc endShapeClipDstOps:dstOps];
+                //[mtlc endShapeClipDstOps:dstOps];
+                [mtlc endShapeClip];
             }
             break;
         case sun_java2d_pipe_BufferedOpCodes_RESET_CLIP:

--- a/src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLRenderer.m	Mon Jul 08 16:04:25 2019 +0530
+++ b/src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLRenderer.m	Mon Jul 08 17:17:28 2019 +0530
@@ -220,13 +220,11 @@
         return;
     }
 
-    struct Vertex verts[PGRAM_VERTEX_COUNT] = {
-            { {x, y, 0.0}},
-            { {x, y+h, 0.0}},
-            { {x+w, y+h, 0.0}},
-            { {x+w, y+h, 0.0}},
-            { {x+w, y, 0.0}},
-            { {x, y, 0.0},
+    struct Vertex verts[QUAD_VERTEX_COUNT] = {
+        { {x, y, 0.0}},
+        { {x, y+h, 0.0}},
+        { {x+w, y, 0.0}},
+        { {x+w, y+h, 0.0}
     }};
 
 
@@ -239,7 +237,7 @@
         return;
 
     [mtlEncoder setVertexBytes:verts length:sizeof(verts) atIndex:MeshVertexBuffer];
-    [mtlEncoder drawPrimitives:MTLPrimitiveTypeTriangle vertexStart:0 vertexCount: PGRAM_VERTEX_COUNT];
+    [mtlEncoder drawPrimitives:MTLPrimitiveTypeTriangleStrip vertexStart:0 vertexCount: QUAD_VERTEX_COUNT];
     [mtlEncoder endEncoding];
 }
 
@@ -281,17 +279,15 @@
             jfloat x2 = spanStruct.spns[i * 4 + 2];
             jfloat y2 = spanStruct.spns[i * 4 + 3];
 
-            struct Vertex verts[PGRAM_VERTEX_COUNT] = {
+            struct Vertex verts[QUAD_VERTEX_COUNT] = {
                 {{x1, y1, 0.0}},
-                {{x2, y1, 0.0}},
                 {{x1, y2, 0.0}},
                 {{x2, y1, 0.0}},
-                {{x2, y2, 0.0}},
-                {{x1, y2, 0.0},
+                {{x2, y2, 0.0}
             }};
 
             [mtlEncoder setVertexBytes:verts length:sizeof(verts) atIndex:MeshVertexBuffer];
-            [mtlEncoder drawPrimitives:MTLPrimitiveTypeTriangle vertexStart:0 vertexCount:PGRAM_VERTEX_COUNT];
+            [mtlEncoder drawPrimitives:MTLPrimitiveTypeTriangleStrip vertexStart:0 vertexCount:QUAD_VERTEX_COUNT];
         }
 
         [mtlEncoder endEncoding];
@@ -321,14 +317,12 @@
                 dx21, dy21,
                 dx12, dy12, dest);
 
-    struct Vertex verts[PGRAM_VERTEX_COUNT] = {
+    struct Vertex verts[QUAD_VERTEX_COUNT] = {
             { {fx11, fy11, 0.0}},
             { {fx11+dx21, fy11+dy21, 0.0}},
             { {fx11+dx12, fy11+dy12, 0.0}},
-            { {fx11+dx21, fy11+dy21, 0.0}},
-            { {fx11 + dx21 + dx12, fy11+ dy21 + dy12, 0.0}},
-            { {fx11+dx12, fy11+dy12, 0.0},
-            }};
+            { {fx11 + dx21 + dx12, fy11+ dy21 + dy12, 0.0}
+        }};
 
     // Encode render command.
     id<MTLRenderCommandEncoder> mtlEncoder = [mtlc createRenderEncoderForDest:dest];
@@ -336,7 +330,7 @@
         return;
 
     [mtlEncoder setVertexBytes:verts length:sizeof(verts) atIndex:MeshVertexBuffer];
-    [mtlEncoder drawPrimitives:MTLPrimitiveTypeTriangle vertexStart:0 vertexCount: PGRAM_VERTEX_COUNT];
+    [mtlEncoder drawPrimitives:MTLPrimitiveTypeTriangleStrip vertexStart:0 vertexCount: QUAD_VERTEX_COUNT];
     [mtlEncoder endEncoding];
 }