git.maemo.org Git - xscreensaver/blob - xscreensaver/hacks/bumps.h

   1 /* Bumps, Copyright (c) 2001 Shane Smit <CodeWeaver@DigitalLoom.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  * Module: "Bumps.h"
  12  * Tab Size: 4
  13  *
  14  * Description:
  15  *  Header file for module "Bumps.c"
  16  *
  17  * Modification History:
  18  *  [10/01/99] - Shane Smit: Creation
  19  *  [10/08/99] - Shane Smit: Port to C. (Ick)
  20  *  [03/08/02] - Shane Smit: New movement code.
  21  *  [09/12/02] - Shane Smit: MIT-SHM XImages.
  22  *                                                       Thanks to Kennett Galbraith <http://www.Alpha-II.com/>
  23  *                                                       for code optimization.
  24  */
  25
  26
  27 #ifndef _BUMPS_H
  28 #define _BUMPS_H
  29
  30
  31 #include <math.h>
  32 #include "screenhack.h"
  33
  34 #ifdef HAVE_XSHM_EXTENSION
  35 #include "xshm.h"
  36 #endif /* HAVE_XSHM_EXTENSION */
  37
  38
  39 /* Defines: */
  40 /* #define VERBOSE */
  41 #define RANDOM() ((int) (random() & 0X7FFFFFFFL))
  42
  43 typedef signed char             int8_;
  44 typedef unsigned char   uint8_;
  45 typedef short                   int16_;
  46 typedef unsigned short  uint16_;
  47 typedef long                    int32_;
  48 typedef unsigned long   uint32_;
  49 typedef unsigned char   BOOL;
  50
  51
  52 /* Globals: */
  53
  54 static const char *bumps_defaults [] = {
  55   ".background: black",
  56   ".foreground: white",
  57   "*color:              random",
  58   "*colorcount: 64",
  59   "*delay:              30000",
  60   "*soften:             1",
  61   "*invert:             FALSE",
  62 #ifdef __sgi    /* really, HAVE_READ_DISPLAY_EXTENSION */
  63   "*visualID:   Best",
  64 #endif
  65 #ifdef HAVE_XSHM_EXTENSION
  66   "*useSHM:             True",
  67 #endif /* HAVE_XSHM_EXTENSION */
  68   0
  69 };
  70
  71 static XrmOptionDescRec bumps_options [] = {
  72   { "-color",           ".color",               XrmoptionSepArg, 0 },
  73   { "-colorcount",      ".colorcount",  XrmoptionSepArg, 0 },
  74   { "-delay",           ".delay",               XrmoptionSepArg, 0 },
  75   { "-soften",          ".soften",              XrmoptionSepArg, 0 },
  76   { "-invert",          ".invert",              XrmoptionNoArg, "TRUE" },
  77 #ifdef HAVE_XSHM_EXTENSION
  78   { "-shm",                     ".useSHM",              XrmoptionNoArg, "True" },
  79   { "-no-shm",          ".useSHM",              XrmoptionNoArg, "False" },
  80 #endif /* HAVE_XSHM_EXTENSION */
  81
  82   { 0, 0, 0, 0 }
  83 };
  84
  85
  86 /* This structure handles everything to do with the spotlight, and is designed to be
  87  * a member of TBumps. */
  88 typedef struct
  89 {
  90         uint8_ *aLightMap;
  91         uint16_ nFalloffDiameter, nFalloffRadius;
  92         uint16_ nLightDiameter, nLightRadius;
  93         float nAccelX, nAccelY;
  94         float nAccelMax;
  95         float nVelocityX, nVelocityY;
  96         float nVelocityMax;
  97         float nXPos, nYPos;
  98 } SSpotLight;
  99
 100 void CreateTables( SSpotLight * );
 101
 102
 103 /* The entire program's operation is contained within this structure. */
 104 typedef struct
 105 {
 106         /* XWindows specific variables. */
 107         Display *dpy;
 108         Window Win;
 109         Pixmap source;
 110         GC GraphicsContext;
 111         XColor *xColors;
 112         uint32_ *aColors;
 113         XImage *pXImage;
 114 #ifdef HAVE_XSHM_EXTENSION
 115         XShmSegmentInfo XShmInfo;
 116         Bool    bUseShm;
 117 #endif /* HAVE_XSHM_EXTENSION */
 118
 119         uint8_ nColorCount;                             /* Number of colors used. */
 120         uint8_ bytesPerPixel;
 121         uint16_ iWinWidth, iWinHeight;
 122         uint16_ *aBumpMap;                              /* The actual bump map. */
 123         SSpotLight SpotLight;
 124
 125         int delay;
 126
 127         async_load_state *img_loader;
 128 } SBumps;
 129
 130
 131 #endif /* _BUMPS_H */
 132
 133
 134 /* vim: ts=4
 135  */