text: /*
   * Copyright (c) 1998, 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.
   */
  
  #ifndef _AWT_GRAPHICSENV_H_
  #define _AWT_GRAPHICSENV_H_
  
  #include <jni_util.h>
  
  #ifndef HEADLESS
  #define MITSHM
  #endif /* !HEADLESS */
  
  #define UNSET_MITSHM (-2)
  #define NOEXT_MITSHM (-1)
  #define CANT_USE_MITSHM (0)
  #define CAN_USE_MITSHM (1)
  
  #ifdef MITSHM
  
  #include <sys/ipc.h>
  #include <sys/shm.h>
  #include <X11/extensions/XShm.h>
  #ifndef X_ShmAttach
  #include <X11/Xmd.h>
  #include <X11/extensions/shmproto.h>
  #endif
  
  #define MITSHM_PERM_COMMON (0666)
  #define MITSHM_PERM_OWNER  (0600)
  
  extern int XShmQueryExtension();
  
  void TryInitMITShm(JNIEnv *env, jint *shmExt, jint *shmPixmaps);
  void resetXShmAttachFailed();
  jboolean isXShmAttachFailed();
  
  #endif /* MITSHM */
  
  /* fieldIDs for X11GraphicsConfig fields that may be accessed from C */
  struct X11GraphicsConfigIDs {
      jfieldID aData;
      jfieldID bitsPerPixel;
  };
  
  #endif /* _AWT_GRAPHICSENV_H_ */
  