gt:                 || type == FBOBJECT && !isCapPresent(CAPS_EXT_FBOBJECT)) {
context: /*
   * Copyright (c) 2004, 2019, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package sun.java2d.opengl;
  
  import java.awt.AWTException;
  import java.awt.BufferCapabilities;
  import java.awt.Color;
  import java.awt.Component;
  import java.awt.Graphics;
  import java.awt.Graphics2D;
  import java.awt.ImageCapabilities;
  import java.awt.Transparency;
  import java.awt.color.ColorSpace;
  import java.awt.image.ColorModel;
  import java.awt.image.DataBuffer;
  import java.awt.image.DirectColorModel;
  import java.awt.image.VolatileImage;
  
  import sun.awt.Win32GraphicsConfig;
  import sun.awt.Win32GraphicsDevice;
  import sun.awt.image.SunVolatileImage;
  import sun.awt.image.SurfaceManager;
  import sun.awt.windows.WComponentPeer;
  import sun.java2d.Disposer;
  import sun.java2d.DisposerRecord;
  import sun.java2d.SunGraphics2D;
  import sun.java2d.Surface;
  import sun.java2d.SurfaceData;
  import sun.java2d.opengl.OGLContext.OGLContextCaps;
  import sun.java2d.pipe.hw.AccelSurface;
  import sun.java2d.pipe.hw.AccelTypedVolatileImage;
  import sun.java2d.pipe.hw.ContextCapabilities;
  import sun.java2d.windows.GDIWindowSurfaceData;
  
  import static sun.java2d.opengl.OGLContext.OGLContextCaps.CAPS_DOUBLEBUFFERED;
  import static sun.java2d.opengl.OGLContext.OGLContextCaps.CAPS_EXT_FBOBJECT;
  import static sun.java2d.opengl.WGLSurfaceData.FBOBJECT;
  import static sun.java2d.opengl.WGLSurfaceData.TEXTURE;
  import static sun.java2d.opengl.WGLSurfaceData.WGLVSyncOffScreenSurfaceData;
  
  public final class WGLGraphicsConfig
      extends Win32GraphicsConfig
      implements OGLGraphicsConfig
  {
      protected static boolean wglAvailable;
      private static ImageCapabilities imageCaps = new WGLImageCaps();
  
      private BufferCapabilities bufferCaps;
      private long pConfigInfo;
      private ContextCapabilities oglCaps;
      private final OGLContext context;
      private Object disposerReferent = new Object();
  
      public static native int getDefaultPixFmt(int screennum);
      private static native boolean initWGL();
      private static native long getWGLConfigInfo(int screennum, int visualnum);
      private static native int getOGLCapabilities(long configInfo);
  
      static {
          wglAvailable = initWGL();
      }
  
      @SuppressWarnings("deprecation")
      protected WGLGraphicsConfig(Win32GraphicsDevice device, int visualnum,
                                  long configInfo, ContextCapabilities oglCaps)
      {
          super(device, visualnum);
          this.pConfigInfo = configInfo;
          this.oglCaps = oglCaps;
          context = new OGLContext(OGLRenderQueue.getInstance());
  
          // add a record to the Disposer so that we destroy the native
          // WGLGraphicsConfigInfo data when this object goes away
          Disposer.addRecord(disposerReferent,
                             new WGLGCDisposerRecord(pConfigInfo));
      }
  
      @Override
      public Object getProxyKey() {
          return this;
      }
  
      @Override
      public SurfaceData createManagedSurface(int w, int h, int transparency) {
          return WGLSurfaceData.createData(this, w, h,
                                           getColorModel(transparency),
                                           null,
                                           OGLSurfaceData.TEXTURE);
      }
  
      public static WGLGraphicsConfig getConfig(Win32GraphicsDevice device,
                                                int pixfmt)
      {
          if (!wglAvailable) {
              return null;
          }
  
          long cfginfo = 0;
          final String[] ids = new String[1];
          OGLRenderQueue rq = OGLRenderQueue.getInstance();
          rq.lock();
          try {
              // getWGLConfigInfo() creates and destroys temporary
              // surfaces/contexts, so we should first invalidate the current
              // Java-level context and flush the queue...
              OGLContext.invalidateCurrentContext();
              WGLGetConfigInfo action =
                  new WGLGetConfigInfo(device.getScreen(), pixfmt);
              rq.flushAndInvokeNow(action);
              cfginfo = action.getConfigInfo();
              if (cfginfo != 0L) {
                  OGLContext.setScratchSurface(cfginfo);
                  rq.flushAndInvokeNow(new Runnable() {
                      @Override
                      public void run() {
                          ids[0] = OGLContext.getOGLIdString();
                      }
                  });
              }
          } finally {
              rq.unlock();
          }
          if (cfginfo == 0) {
              return null;
          }
  
          int oglCaps = getOGLCapabilities(cfginfo);
          ContextCapabilities caps = new OGLContextCaps(oglCaps, ids[0]);
  
          return new WGLGraphicsConfig(device, pixfmt, cfginfo, caps);
      }
  
      /**
       * This is a small helper class that allows us to execute
       * getWGLConfigInfo() on the queue flushing thread.
       */
      private static class WGLGetConfigInfo implements Runnable {
          private int screen;
          private int pixfmt;
          private long cfginfo;
          private WGLGetConfigInfo(int screen, int pixfmt) {
              this.screen = screen;
              this.pixfmt = pixfmt;
          }
          @Override
          public void run() {
              cfginfo = getWGLConfigInfo(screen, pixfmt);
          }
          public long getConfigInfo() {
              return cfginfo;
          }
      }
  
      public static boolean isWGLAvailable() {
          return wglAvailable;
      }
  
      /**
       * Returns true if the provided capability bit is present for this config.
       * See OGLContext.java for a list of supported capabilities.
       */
      @Override
      public final boolean isCapPresent(int cap) {
          return ((oglCaps.getCaps() & cap) != 0);
      }
  
      @Override
      public final long getNativeConfigInfo() {
          return pConfigInfo;
      }
  
      @Override
      public final OGLContext getContext() {
          return context;
      }
  
      private static class WGLGCDisposerRecord implements DisposerRecord {
          private long pCfgInfo;
          public WGLGCDisposerRecord(long pCfgInfo) {
              this.pCfgInfo = pCfgInfo;
          }
          @Override
          public void dispose() {
              if (pCfgInfo != 0) {
                  OGLRenderQueue.disposeGraphicsConfig(pCfgInfo);
                  pCfgInfo = 0;
              }
          }
      }
  
      @Override
      public synchronized void displayChanged() {
          super.displayChanged();
          // the context could hold a reference to a WGLSurfaceData, which in
          // turn has a reference back to this WGLGraphicsConfig, so in order
          // for this instance to be disposed we need to break the connection
          OGLRenderQueue rq = OGLRenderQueue.getInstance();
          rq.lock();
          try {
              OGLContext.invalidateCurrentContext();
          } finally {
              rq.unlock();
          }
      }
  
      @Override
      public ColorModel getColorModel(int transparency) {
          switch (transparency) {
          case Transparency.OPAQUE:
              // REMIND: once the ColorModel spec is changed, this should be
              //         an opaque premultiplied DCM...
              return new DirectColorModel(24, 0xff0000, 0xff00, 0xff);
          case Transparency.BITMASK:
              return new DirectColorModel(25, 0xff0000, 0xff00, 0xff, 0x1000000);
          case Transparency.TRANSLUCENT:
              ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
              return new DirectColorModel(cs, 32,
                                          0xff0000, 0xff00, 0xff, 0xff000000,
                                          true, DataBuffer.TYPE_INT);
          default:
              return null;
          }
      }
  
      @Override
      public String toString() {
          return ("WGLGraphicsConfig[dev="+getDevice()+",pixfmt="+visual+"]");
      }
  
      /**
       * The following methods are invoked from WComponentPeer.java rather
       * than having the Win32-dependent implementations hardcoded in that
       * class.  This way the appropriate actions are taken based on the peer's
       * GraphicsConfig, whether it is a Win32GraphicsConfig or a
       * WGLGraphicsConfig.
       */
  
      /**
       * Creates a new SurfaceData that will be associated with the given
       * WComponentPeer.
       */
      @Override
      public SurfaceData createSurfaceData(WComponentPeer peer,
                                           int numBackBuffers)
      {
          SurfaceData sd = WGLSurfaceData.createData(peer);
          if (sd == null) {
              sd = GDIWindowSurfaceData.createData(peer);
          }
          return sd;
      }
  
      /**
       * The following methods correspond to the multibuffering methods in
       * WComponentPeer.java...
       */
  
      /**
       * Checks that the requested configuration is natively supported; if not,
       * an AWTException is thrown.
       */
      @Override
      public void assertOperationSupported(Component target,
                                           int numBuffers,
                                           BufferCapabilities caps)
          throws AWTException
      {
          if (numBuffers > 2) {
              throw new AWTException(
                  "Only double or single buffering is supported");
          }
          BufferCapabilities configCaps = getBufferCapabilities();
          if (!configCaps.isPageFlipping()) {
              throw new AWTException("Page flipping is not supported");
          }
          if (caps.getFlipContents() == BufferCapabilities.FlipContents.PRIOR) {
              throw new AWTException("FlipContents.PRIOR is not supported");
          }
      }
  
      /**
       * Creates a WGL-based backbuffer for the given peer and returns the
       * image wrapper.
       */
      @Override
      public VolatileImage createBackBuffer(WComponentPeer peer) {
          Component target = (Component)peer.getTarget();
          // it is possible for the component to have size 0x0, adjust it to
          // be at least 1x1 to avoid IAE
          int w = Math.max(1, target.getWidth());
          int h = Math.max(1, target.getHeight());
          return new SunVolatileImage(target,
                                      w, h,
                                      Boolean.TRUE);
      }
  
      /**
       * Performs the native WGL flip operation for the given target Component.
       */
      @Override
      public void flip(WComponentPeer peer,
                       Component target, VolatileImage backBuffer,
                       int x1, int y1, int x2, int y2,
                       BufferCapabilities.FlipContents flipAction)
      {
          if (flipAction == BufferCapabilities.FlipContents.COPIED) {
              SurfaceManager vsm = SurfaceManager.getManager(backBuffer);
              SurfaceData sd = vsm.getPrimarySurfaceData();
  
              if (sd instanceof WGLVSyncOffScreenSurfaceData) {
                  WGLVSyncOffScreenSurfaceData vsd =
                      (WGLVSyncOffScreenSurfaceData)sd;
                  SurfaceData bbsd = vsd.getFlipSurface();
                  Graphics2D bbg =
                      new SunGraphics2D(bbsd, Color.black, Color.white, null);
                  try {
                      bbg.drawImage(backBuffer, 0, 0, null);
                  } finally {
                      bbg.dispose();
                  }
              } else {
                  Graphics g = peer.getGraphics();
                  try {
                      g.drawImage(backBuffer,
                                  x1, y1, x2, y2,
                                  x1, y1, x2, y2,
                                  null);
                  } finally {
                      g.dispose();
                  }
                  return;
              }
          } else if (flipAction == BufferCapabilities.FlipContents.PRIOR) {
              // not supported by WGL...
              return;
          }
  
          OGLSurfaceData.swapBuffers(peer.getData());
  
          if (flipAction == BufferCapabilities.FlipContents.BACKGROUND) {
              Graphics g = backBuffer.getGraphics();
              try {
                  g.setColor(target.getBackground());
                  g.fillRect(0, 0,
                             backBuffer.getWidth(),
                             backBuffer.getHeight());
              } finally {
                  g.dispose();
              }
          }
      }
  
      private static class WGLBufferCaps extends BufferCapabilities {
          public WGLBufferCaps(boolean dblBuf) {
              super(imageCaps, imageCaps,
                    dblBuf ? FlipContents.UNDEFINED : null);
          }
      }
  
      @Override
      public BufferCapabilities getBufferCapabilities() {
          if (bufferCaps == null) {
              boolean dblBuf = isCapPresent(CAPS_DOUBLEBUFFERED);
              bufferCaps = new WGLBufferCaps(dblBuf);
          }
          return bufferCaps;
      }
  
      private static class WGLImageCaps extends ImageCapabilities {
          private WGLImageCaps() {
              super(true);
          }
          @Override
          public boolean isTrueVolatile() {
              return true;
          }
      }
  
      @Override
      public ImageCapabilities getImageCapabilities() {
          return imageCaps;
      }
  
      @Override
      public VolatileImage
          createCompatibleVolatileImage(int width, int height,
                                        int transparency, int type)
      {
          if ((type != FBOBJECT && type != TEXTURE)
                  || transparency == Transparency.BITMASK
  