1 /*
   2  * Copyright (c) 2019, 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.metal;
  27 
  28 import sun.java2d.NullSurfaceData;
  29 import sun.java2d.SurfaceData;
  30 import sun.lwawt.LWWindowPeer;
  31 import sun.lwawt.macosx.CFRetainedResource;
  32 
  33 import java.awt.*;
  34 
  35 public class MTLLayer extends CFRetainedResource {
  36 
  37     private native long nativeCreateLayer();
  38     private static native void nativeSetScale(long layerPtr, double scale);
  39     private static native void validate(long layerPtr, MTLSurfaceData cglsd);
  40 
  41     private LWWindowPeer peer;
  42     private int scale = 1;
  43 
  44     private SurfaceData surfaceData; // represents intermediate buffer (texture)
  45 
  46     public MTLLayer(LWWindowPeer peer) {
  47         super(0, true);
  48 
  49         setPtr(nativeCreateLayer());
  50         this.peer = peer;
  51     }
  52 
  53     public long getPointer() {
  54         return ptr;
  55     }
  56 
  57     public Rectangle getBounds() {
  58         return peer.getBounds();
  59     }
  60 
  61     public GraphicsConfiguration getGraphicsConfiguration() {
  62         return peer.getGraphicsConfiguration();
  63     }
  64 
  65     public boolean isOpaque() {
  66         return !peer.isTranslucent();
  67     }
  68 
  69     public int getTransparency() {
  70         return isOpaque() ? Transparency.OPAQUE : Transparency.TRANSLUCENT;
  71     }
  72 
  73     public Object getDestination() {
  74         return peer.getTarget();
  75     }
  76 
  77     public SurfaceData replaceSurfaceData() {
  78         if (getBounds().isEmpty()) {
  79             surfaceData = NullSurfaceData.theInstance;
  80             return surfaceData;
  81         }
  82 
  83         // the layer redirects all painting to the buffer's graphics
  84         // and blits the buffer to the layer surface (in drawInCGLContext callback)
  85         MTLGraphicsConfig gc = (MTLGraphicsConfig)getGraphicsConfiguration();
  86         surfaceData = gc.createSurfaceData(this);
  87         setScale(gc.getDevice().getScaleFactor());
  88         // the layer holds a reference to the buffer, which in
  89         // turn has a reference back to this layer
  90         if (surfaceData instanceof MTLSurfaceData) {
  91             validate((MTLSurfaceData)surfaceData);
  92         }
  93 
  94         return surfaceData;
  95     }
  96 
  97     public SurfaceData getSurfaceData() {
  98         return surfaceData;
  99     }
 100 
 101     public void validate(final MTLSurfaceData cglsd) {
 102         MTLRenderQueue rq = MTLRenderQueue.getInstance();
 103         rq.lock();
 104         try {
 105             execute(ptr -> validate(ptr, cglsd));
 106         } finally {
 107             rq.unlock();
 108         }
 109     }
 110 
 111     @Override
 112     public void dispose() {
 113         // break the connection between the layer and the buffer
 114         validate(null);
 115         super.dispose();
 116     }
 117 
 118     private void setScale(final int _scale) {
 119         if (scale != _scale) {
 120             scale = _scale;
 121             execute(ptr -> nativeSetScale(ptr, scale));
 122         }
 123     }
 124 }