1 /*
   2  * Copyright (c) 2011, 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.opengl;
  27 
  28 import sun.lwawt.macosx.CFRetainedResource;
  29 import sun.lwawt.LWWindowPeer;
  30 
  31 import sun.java2d.SurfaceData;
  32 import sun.java2d.NullSurfaceData;
  33 
  34 import sun.awt.CGraphicsConfig;
  35 
  36 import java.awt.Rectangle;
  37 import java.awt.GraphicsConfiguration;
  38 import java.awt.Transparency;
  39 
  40 public class CGLLayer extends CFRetainedResource {
  41 
  42     private native long nativeCreateLayer();
  43 
  44     private static native void validate(long layerPtr, CGLSurfaceData cglsd);
  45     private static native void blitTexture(long layerPtr);
  46 
  47     private LWWindowPeer peer;
  48 
  49     private SurfaceData surfaceData; // represents intermediate buffer (texture)
  50 
  51     public CGLLayer(LWWindowPeer peer) {
  52         super(0, true);
  53 
  54         setPtr(nativeCreateLayer());
  55         this.peer = peer;
  56     }
  57 
  58     public long getPointer() {
  59         return ptr;
  60     }
  61 
  62     public Rectangle getBounds() {
  63         return peer.getBounds();
  64     }
  65 
  66     public GraphicsConfiguration getGraphicsConfiguration() {
  67         return peer.getGraphicsConfiguration();
  68     }
  69 
  70     public boolean isOpaque() {
  71         return peer.isOpaque();
  72     }
  73 
  74     public int getTransparency() {
  75         return (peer.isOpaque() ? Transparency.OPAQUE : Transparency.TRANSLUCENT);

  76     }
  77 
  78     public Object getDestination() {
  79         return peer;
  80     }
  81 
  82     public SurfaceData replaceSurfaceData() {
  83         if (peer.getBounds().isEmpty()) {
  84             surfaceData = NullSurfaceData.theInstance;
  85             return surfaceData;
  86         }
  87 
  88         // the layer redirects all painting to the buffer's graphics
  89         // and blits the buffer to the layer surface (in drawInCGLContext callback)
  90         CGraphicsConfig gc = (CGraphicsConfig)peer.getGraphicsConfiguration();
  91         surfaceData = gc.createSurfaceData(this);
  92 
  93         // the layer holds a reference to the buffer, which in
  94         // turn has a reference back to this layer
  95         if (surfaceData instanceof CGLSurfaceData) {
  96             validate((CGLSurfaceData)surfaceData);
  97         }
  98 
  99         return surfaceData;
 100     }
 101 
 102     public SurfaceData getSurfaceData() {
 103         return surfaceData;
 104     }
 105 
 106     public void validate(final CGLSurfaceData cglsd) {
 107         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 108         rq.lock();
 109         try {
 110             validate(getPointer(), cglsd);
 111         } finally {
 112             rq.unlock();
 113         }
 114     }
 115 
 116     @Override
 117     public void dispose() {
 118         // break the connection between the layer and the buffer
 119         validate(null);
 120         super.dispose();
 121     }
 122 
 123     // ----------------------------------------------------------------------
 124     // NATIVE CALLBACKS
 125     // ----------------------------------------------------------------------
 126 
 127     private void drawInCGLContext() {
 128         // tell the flusher thread not to update the intermediate buffer
 129         // until we are done blitting from it
 130         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 131         rq.lock();
 132         try {
 133             blitTexture(getPointer());
 134         } finally {
 135             rq.unlock();
 136         }
 137     }
 138 }
--- EOF ---