1 /*
   2  * Copyright (c) 2012, 2013, 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 com.sun.prism.es2;
  27 
  28 import com.sun.prism.paint.Color;
  29 import java.security.AccessController;
  30 import java.security.PrivilegedAction;
  31 
  32 
  33 class MonocleGLDrawable extends GLDrawable {
  34 
  35     private static final boolean transparentFramebuffer =
  36             AccessController.doPrivileged(new PrivilegedAction<Boolean>() {
  37                 @Override
  38                 public Boolean run() {
  39                     return Boolean.getBoolean("com.sun.javafx.transparentFramebuffer");
  40                 }
  41             });
  42 
  43     private static native long nCreateDrawable(long nativeWindow, long nativeCtxInfo);
  44     private static native long nGetDummyDrawable(long nativeCtxInfo);
  45     private static native boolean nSwapBuffers(long nativeDInfo);
  46     boolean isDummy = false;
  47 
  48     MonocleGLDrawable(GLPixelFormat pixelFormat) {
  49 
  50         super(0L, pixelFormat);
  51         long nDInfo = nGetDummyDrawable(pixelFormat.getNativePFInfo());
  52         setNativeDrawableInfo(nDInfo);
  53         isDummy = true;
  54     }
  55 
  56     MonocleGLDrawable(long nativeWindow, GLPixelFormat pixelFormat) {
  57         super(nativeWindow, pixelFormat);
  58         long nDInfo = nCreateDrawable(nativeWindow, pixelFormat.getNativePFInfo());
  59         setNativeDrawableInfo(nDInfo);
  60     }
  61 
  62     @Override
  63     boolean swapBuffers(GLContext glCtx) {
  64         boolean retval = nSwapBuffers(getNativeDrawableInfo());
  65         // TODO: This looks hacky. Need to find a better approach.
  66         // For Monocle, we are painting in Z-order from the back,
  67         // possibly (likely) with an app that does not cover the
  68         // full screen. We need to start each paint with an empty canvas.
  69         // The assumption here was that we would do that by clearing the buffer. 
  70         glCtx.clearBuffers(
  71                 transparentFramebuffer ? Color.TRANSPARENT : Color.BLACK,
  72                 true, true, true);
  73         return retval;
  74     }
  75 }