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     private static native void nativeSetScale(long layerPtr, double scale);
  44     private static native void validate(long layerPtr, CGLSurfaceData cglsd);
  45     private static native void blitTexture(long layerPtr);
  46 
  47     private LWWindowPeer peer;
  48     private int scale = 1;
  49 
  50     private SurfaceData surfaceData; // represents intermediate buffer (texture)
  51 
  52     public CGLLayer(LWWindowPeer peer) {
  53         super(0, true);
  54 
  55         setPtr(nativeCreateLayer());
  56         this.peer = peer;
  57     }
  58 
  59     public long getPointer() {
  60         return ptr;
  61     }
  62 
  63     public Rectangle getBounds() {
  64         return peer.getBounds();
  65     }
  66 
  67     public GraphicsConfiguration getGraphicsConfiguration() {
  68         return peer.getGraphicsConfiguration();
  69     }
  70 
  71     public boolean isOpaque() {
  72         return !peer.isTranslucent();
  73     }
  74 
  75     public int getTransparency() {
  76         return peer.isTranslucent() ? Transparency.TRANSLUCENT :
  77                Transparency.OPAQUE;
  78     }
  79 
  80     public Object getDestination() {
  81         return peer;
  82     }
  83 
  84     public SurfaceData replaceSurfaceData() {
  85         if (peer.getBounds().isEmpty()) {
  86             surfaceData = NullSurfaceData.theInstance;
  87             return surfaceData;
  88         }
  89 
  90         // the layer redirects all painting to the buffer's graphics
  91         // and blits the buffer to the layer surface (in drawInCGLContext callback)
  92         CGraphicsConfig gc = (CGraphicsConfig)peer.getGraphicsConfiguration();
  93         surfaceData = gc.createSurfaceData(this);
  94         setScale(gc.getDevice().getScaleFactor());
  95         // the layer holds a reference to the buffer, which in
  96         // turn has a reference back to this layer
  97         if (surfaceData instanceof CGLSurfaceData) {
  98             validate((CGLSurfaceData)surfaceData);
  99         }
 100 
 101         return surfaceData;
 102     }
 103 
 104     public SurfaceData getSurfaceData() {
 105         return surfaceData;
 106     }
 107 
 108     public void validate(final CGLSurfaceData cglsd) {
 109         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 110         rq.lock();
 111         try {
 112             validate(getPointer(), cglsd);
 113         } finally {
 114             rq.unlock();
 115         }
 116     }
 117 
 118     @Override
 119     public void dispose() {
 120         // break the connection between the layer and the buffer
 121         validate(null);
 122         super.dispose();
 123     }
 124 
 125     private void setScale(final int _scale) {
 126         if (scale != _scale) {
 127             scale = _scale;
 128             nativeSetScale(getPointer(), scale);
 129         }
 130     }
 131 
 132     // ----------------------------------------------------------------------
 133     // NATIVE CALLBACKS
 134     // ----------------------------------------------------------------------
 135 
 136     private void drawInCGLContext() {
 137         // tell the flusher thread not to update the intermediate buffer
 138         // until we are done blitting from it
 139         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 140         rq.lock();
 141         try {
 142             blitTexture(getPointer());
 143         } finally {
 144             rq.unlock();
 145         }
 146     }
 147 }