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 }