1 /*
   2  * Copyright (c) 2004, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.java2d.loops;
  27 
  28 import java.awt.Composite;
  29 import java.awt.geom.AffineTransform;
  30 import sun.java2d.SurfaceData;
  31 import sun.java2d.loops.GraphicsPrimitive;
  32 import sun.java2d.pipe.Region;
  33 
  34 /**
  35  * TransformHelper
  36  * 1) applies an AffineTransform to a rectangle of pixels while copying
  37  *    from one surface to another
  38  * 2) performs compositing of colors based upon a Composite
  39  *    parameter
  40  *
  41  * precise behavior is undefined if the source surface
  42  * and the destination surface are the same surface
  43  * with overlapping regions of pixels
  44  */
  45 public class TransformHelper extends GraphicsPrimitive
  46 {
  47     public static final String methodSignature =
  48         "TransformHelper(...)".toString();
  49 
  50     public static final int primTypeID = makePrimTypeID();
  51 
  52     private static RenderCache helpercache = new RenderCache(10);
  53 
  54     public static TransformHelper locate(SurfaceType srctype) {
  55         return (TransformHelper)
  56             GraphicsPrimitiveMgr.locate(primTypeID,
  57                                         srctype,
  58                                         CompositeType.SrcNoEa,
  59                                         SurfaceType.IntArgbPre);
  60     }
  61 
  62     public static synchronized TransformHelper getFromCache(SurfaceType src) {
  63         Object o = helpercache.get(src, null, null);
  64         if (o != null) {
  65             return (TransformHelper) o;
  66         }
  67         TransformHelper helper = locate(src);
  68         if (helper == null) {
  69             /*
  70             System.out.println("helper loop not found for:");
  71             System.out.println("src:  "+src);
  72             */
  73         } else {
  74             helpercache.put(src, null, null, helper);
  75         }
  76         return helper;
  77     }
  78 
  79     protected TransformHelper(SurfaceType srctype) {
  80         super(methodSignature, primTypeID, srctype,
  81               CompositeType.SrcNoEa,
  82               SurfaceType.IntArgbPre);
  83     }
  84 
  85     public TransformHelper(long pNativePrim, SurfaceType srctype,
  86                            CompositeType comptype,
  87                            SurfaceType dsttype)
  88     {
  89         super(pNativePrim, methodSignature, primTypeID,
  90               srctype, comptype, dsttype);
  91     }
  92 
  93     public native void Transform(MaskBlit output,
  94                                  SurfaceData src, SurfaceData dst,
  95                                  Composite comp, Region clip,
  96                                  AffineTransform itx, int txtype,
  97                                  int sx1, int sy1, int sx2, int sy2,
  98                                  int dx1, int dy1, int dx2, int dy2,
  99                                  int[] edges, int dxoff, int dyoff);
 100 
 101     public GraphicsPrimitive makePrimitive(SurfaceType srctype,
 102                                            CompositeType comptype,
 103                                            SurfaceType dsttype)
 104     {
 105         return null;
 106     }
 107 
 108     public GraphicsPrimitive traceWrap() {
 109         return new TraceTransformHelper(this);
 110     }
 111 
 112     private static class TraceTransformHelper extends TransformHelper {
 113         TransformHelper target;
 114 
 115         public TraceTransformHelper(TransformHelper target) {
 116             super(target.getSourceType());
 117             this.target = target;
 118         }
 119 
 120         public GraphicsPrimitive traceWrap() {
 121             return this;
 122         }
 123 
 124         public void Transform(MaskBlit output,
 125                               SurfaceData src, SurfaceData dst,
 126                               Composite comp, Region clip,
 127                               AffineTransform itx, int txtype,
 128                               int sx1, int sy1, int sx2, int sy2,
 129                               int dx1, int dy1, int dx2, int dy2,
 130                               int[] edges, int dxoff, int dyoff)
 131         {
 132             tracePrimitive(target);
 133             target.Transform(output, src, dst, comp, clip, itx, txtype,
 134                              sx1, sy1, sx2, sy2,
 135                              dx1, dy1, dx2, dy2,
 136                              edges, dxoff, dyoff);
 137         }
 138     }
 139 }