--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/java2d/loops/TransformHelper.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,140 @@
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.java2d.loops;
+
+import java.awt.Composite;
+import java.awt.geom.AffineTransform;
+import java.lang.ref.WeakReference;
+import sun.java2d.SurfaceData;
+import sun.java2d.loops.GraphicsPrimitive;
+import sun.java2d.pipe.Region;
+
+/**
+ * TransformHelper
+ * 1) applies an AffineTransform to a rectangle of pixels while copying
+ *    from one surface to another
+ * 2) performs compositing of colors based upon a Composite
+ *    parameter
+ *
+ * precise behavior is undefined if the source surface
+ * and the destination surface are the same surface
+ * with overlapping regions of pixels
+ */
+public class TransformHelper extends GraphicsPrimitive
+{
+    public static final String methodSignature =
+        "TransformHelper(...)".toString();
+
+    public static final int primTypeID = makePrimTypeID();
+
+    private static RenderCache helpercache = new RenderCache(10);
+
+    public static TransformHelper locate(SurfaceType srctype) {
+        return (TransformHelper)
+            GraphicsPrimitiveMgr.locate(primTypeID,
+                                        srctype,
+                                        CompositeType.SrcNoEa,
+                                        SurfaceType.IntArgbPre);
+    }
+
+    public static synchronized TransformHelper getFromCache(SurfaceType src) {
+        Object o = helpercache.get(src, null, null);
+        if (o != null) {
+            return (TransformHelper) o;
+        }
+        TransformHelper helper = locate(src);
+        if (helper == null) {
+            /*
+            System.out.println("helper loop not found for:");
+            System.out.println("src:  "+src);
+            */
+        } else {
+            helpercache.put(src, null, null, helper);
+        }
+        return helper;
+    }
+
+    protected TransformHelper(SurfaceType srctype) {
+        super(methodSignature, primTypeID, srctype,
+              CompositeType.SrcNoEa,
+              SurfaceType.IntArgbPre);
+    }
+
+    public TransformHelper(long pNativePrim, SurfaceType srctype,
+                           CompositeType comptype,
+                           SurfaceType dsttype)
+    {
+        super(pNativePrim, methodSignature, primTypeID,
+              srctype, comptype, dsttype);
+    }
+
+    public native void Transform(MaskBlit output,
+                                 SurfaceData src, SurfaceData dst,
+                                 Composite comp, Region clip,
+                                 AffineTransform itx, int txtype,
+                                 int sx1, int sy1, int sx2, int sy2,
+                                 int dx1, int dy1, int dx2, int dy2,
+                                 int edges[], int dxoff, int dyoff);
+
+    public GraphicsPrimitive makePrimitive(SurfaceType srctype,
+                                           CompositeType comptype,
+                                           SurfaceType dsttype)
+    {
+        return null;
+    }
+
+    public GraphicsPrimitive traceWrap() {
+        return new TraceTransformHelper(this);
+    }
+
+    private static class TraceTransformHelper extends TransformHelper {
+        TransformHelper target;
+
+        public TraceTransformHelper(TransformHelper target) {
+            super(target.getSourceType());
+            this.target = target;
+        }
+
+        public GraphicsPrimitive traceWrap() {
+            return this;
+        }
+
+        public void Transform(MaskBlit output,
+                              SurfaceData src, SurfaceData dst,
+                              Composite comp, Region clip,
+                              AffineTransform itx, int txtype,
+                              int sx1, int sy1, int sx2, int sy2,
+                              int dx1, int dy1, int dx2, int dy2,
+                              int edges[], int dxoff, int dyoff)
+        {
+            tracePrimitive(target);
+            target.Transform(output, src, dst, comp, clip, itx, txtype,
+                             sx1, sy1, sx2, sy2,
+                             dx1, dy1, dx2, dy2,
+                             edges, dxoff, dyoff);
+        }
+    }
+}