screenhack/screenhack.h

/* xscreensaver, Copyright (c) 1992-2018 Jamie Zawinski <jwz@jwz.org>
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation.  No representations are made about the suitability of this
 * software for any purpose.  It is provided "as is" without express or
 * implied warranty.
 */

#ifndef __SCREENHACK_H__
#define __SCREENHACK_H__

#include "screenhackI.h"

/* In an Xlib world, we define two global symbols here:
   a struct in `MODULENAME_xscreensaver_function_table',
   and a pointer to that in `xscreensaver_function_table'.

   In a Cocoa/Android world, we only define the prefixed symbol;
   the un-prefixed symbol does not exist.
 */
#ifdef HAVE_JWXYZ
# define XSCREENSAVER_LINK(NAME)
#else
# define XSCREENSAVER_LINK(NAME) \
   struct xscreensaver_function_table *xscreensaver_function_table = &NAME;
#endif


#if defined(HAVE_JWXYZ) && !defined(__XLOCKMORE_INTERNAL_H__)
  /* this is one enormous kludge... */
# undef ya_rand_init
  static void
  xscreensaver_common_setup(struct xscreensaver_function_table *xsft, void *a)
  { ya_rand_init(0); }
#else
# define xscreensaver_common_setup 0
#endif


#ifdef HAVE_JWXYZ
# define SCREENHACK_VISUAL DEFAULT_VISUAL
#else /* !HAVE_JWXYZ */
# define SCREENHACK_VISUAL 0, 0
#endif /* !HAVE_JWXYZ */

#define XSCREENSAVER_MODULE_2(CLASS,NAME,PREFIX)                \
  struct xscreensaver_function_table                            \
         NAME ## _xscreensaver_function_table = {               \
           CLASS,                                               \
           PREFIX ## _defaults,                                 \
           PREFIX ## _options,                                  \
           xscreensaver_common_setup, 0,                        \
           PREFIX ## _init,                                     \
           PREFIX ## _draw,                                     \
           PREFIX ## _reshape,                                  \
           PREFIX ## _event,                                    \
           PREFIX ## _free,                                     \
           0, fps_free,                                         \
           SCREENHACK_VISUAL };                                 \
  XSCREENSAVER_LINK (NAME ## _xscreensaver_function_table)

#define XSCREENSAVER_MODULE(CLASS,PREFIX)                       \
      XSCREENSAVER_MODULE_2(CLASS,PREFIX,PREFIX)

#endif /* __SCREENHACK_H__ */