git.hungrycats.org Git - xscreensaver/blob - hacks/screenhack.h

   1 /* xscreensaver, Copyright (c) 1992-2015 Jamie Zawinski <jwz@jwz.org>
   2  *
   3  * Permission to use, copy, modify, distribute, and sell this software and its
   4  * documentation for any purpose is hereby granted without fee, provided that
   5  * the above copyright notice appear in all copies and that both that
   6  * copyright notice and this permission notice appear in supporting
   7  * documentation.  No representations are made about the suitability of this
   8  * software for any purpose.  It is provided "as is" without express or
   9  * implied warranty.
  10  */
  11
  12 #ifndef __SCREENHACK_H__
  13 #define __SCREENHACK_H__
  14
  15 #include "screenhackI.h"
  16
  17 /* In an Xlib world, we define two global symbols here:
  18    a struct in `MODULENAME_xscreensaver_function_table',
  19    and a pointer to that in `xscreensaver_function_table'.
  20
  21    In a Cocoa/Android world, we only define the prefixed symbol;
  22    the un-prefixed symbol does not exist.
  23  */
  24 #ifdef HAVE_JWXYZ
  25 # define XSCREENSAVER_LINK(NAME)
  26 #else
  27 # define XSCREENSAVER_LINK(NAME) \
  28    struct xscreensaver_function_table *xscreensaver_function_table = &NAME;
  29 #endif
  30
  31
  32 #if defined(HAVE_JWXYZ) && !defined(__XLOCKMORE_INTERNAL_H__)
  33   /* this is one enormous kludge... */
  34 # undef ya_rand_init
  35   static void
  36   xscreensaver_common_setup(struct xscreensaver_function_table *xsft, void *a)
  37   { ya_rand_init(0); }
  38 #else
  39 # define xscreensaver_common_setup 0
  40 #endif
  41
  42
  43 #define XSCREENSAVER_MODULE_2(CLASS,NAME,PREFIX)                \
  44   struct xscreensaver_function_table                            \
  45          NAME ## _xscreensaver_function_table = {               \
  46            CLASS,                                               \
  47            PREFIX ## _defaults,                                 \
  48            PREFIX ## _options,                                  \
  49            xscreensaver_common_setup, 0,                        \
  50            PREFIX ## _init,                                     \
  51            PREFIX ## _draw,                                     \
  52            PREFIX ## _reshape,                                  \
  53            PREFIX ## _event,                                    \
  54            PREFIX ## _free,                                     \
  55            0, 0, 0 };                                           \
  56   XSCREENSAVER_LINK (NAME ## _xscreensaver_function_table)
  57
  58 #define XSCREENSAVER_MODULE(CLASS,PREFIX)                       \
  59       XSCREENSAVER_MODULE_2(CLASS,PREFIX,PREFIX)
  60
  61 #endif /* __SCREENHACK_H__ */