src/libgame/x11.c

   1 /***********************************************************
   2 *  Rocks'n'Diamonds -- McDuffin Strikes Back!              *
   3 *----------------------------------------------------------*
   4 *  ©1995 Artsoft Development                               *
   5 *        Holger Schemel                                    *
   6 *        33659 Bielefeld-Senne                             *
   7 *        Telefon: (0521) 493245                            *
   8 *        eMail: aeglos@valinor.owl.de                      *
   9 *               aeglos@uni-paderborn.de                    *
  10 *               q99492@pbhrzx.uni-paderborn.de             *
  11 *----------------------------------------------------------*
  12 *  x11.c                                                   *
  13 ***********************************************************/
  14
  15 #include "libgame.h"
  16
  17 #if defined(TARGET_X11)
  18
  19 #if 0
  20 #include "main_TMP.h"
  21 #endif
  22
  23 #if 0
  24 struct IconFileInfo
  25 {
  26   char *picture_filename;
  27   char *picturemask_filename;
  28 };
  29 #endif
  30
  31 static void X11InitDisplay();
  32 static DrawWindow X11InitWindow();
  33
  34 inline void X11InitVideoDisplay(void)
  35 {
  36   /* initialize X11 video */
  37   X11InitDisplay();
  38
  39   /* set default X11 depth */
  40   video.default_depth = XDefaultDepth(display, screen);
  41 }
  42
  43 inline void X11InitVideoBuffer(DrawBuffer *backbuffer, DrawWindow *window)
  44 {
  45   *window = X11InitWindow();
  46
  47   XMapWindow(display, *window);
  48   FlushDisplay();
  49
  50   /* create additional (off-screen) buffer for double-buffering */
  51   *backbuffer = CreateBitmap(video.width, video.height, video.depth);
  52 }
  53
  54 static void X11InitDisplay()
  55 {
  56 #if !defined(PLATFORM_MSDOS)
  57   XVisualInfo vinfo_template, *vinfo;
  58   int num_visuals;
  59 #endif
  60   unsigned int depth;
  61
  62   /* connect to X server */
  63   if (!(display = XOpenDisplay(options.display_name)))
  64     Error(ERR_EXIT, "cannot connect to X server %s",
  65           XDisplayName(options.display_name));
  66
  67   screen = DefaultScreen(display);
  68   visual = DefaultVisual(display, screen);
  69   depth  = DefaultDepth(display, screen);
  70   cmap   = DefaultColormap(display, screen);
  71
  72 #if !defined(PLATFORM_MSDOS)
  73   /* look for good enough visual */
  74   vinfo_template.screen = screen;
  75   vinfo_template.class = (depth == 8 ? PseudoColor : TrueColor);
  76   vinfo_template.depth = depth;
  77   if ((vinfo = XGetVisualInfo(display, VisualScreenMask | VisualClassMask |
  78                               VisualDepthMask, &vinfo_template, &num_visuals)))
  79   {
  80     visual = vinfo->visual;
  81     XFree((void *)vinfo);
  82   }
  83
  84   /* got appropriate visual? */
  85   if (depth < 8)
  86   {
  87     printf("Sorry, displays with less than 8 bits per pixel not supported.\n");
  88     exit(-1);
  89   }
  90   else if ((depth ==8 && visual->class != PseudoColor) ||
  91            (depth > 8 && visual->class != TrueColor &&
  92             visual->class != DirectColor))
  93   {
  94     printf("Sorry, cannot get appropriate visual.\n");
  95     exit(-1);
  96   }
  97 #endif /* !PLATFORM_MSDOS */
  98 }
  99
 100 static DrawWindow X11InitWindow()
 101 {
 102   Window window;
 103   unsigned int border_width = 4;
 104   XGCValues gc_values;
 105   unsigned long gc_valuemask;
 106 #if !defined(PLATFORM_MSDOS)
 107   XTextProperty windowName, iconName;
 108   Pixmap icon_pixmap, iconmask_pixmap;
 109   unsigned int icon_width, icon_height;
 110   int icon_hot_x, icon_hot_y;
 111   char icon_filename[256];
 112   XSizeHints size_hints;
 113   XWMHints wm_hints;
 114   XClassHint class_hints;
 115   char *window_name = program.window_title;
 116   char *icon_name = program.window_title;
 117   long window_event_mask;
 118   Atom proto_atom = None, delete_atom = None;
 119 #endif
 120   int screen_width, screen_height;
 121   int win_xpos, win_ypos;
 122   unsigned long pen_fg = WhitePixel(display,screen);
 123   unsigned long pen_bg = BlackPixel(display,screen);
 124   const int width = video.width, height = video.height;
 125
 126 #if 0
 127 #if !defined(PLATFORM_MSDOS)
 128   static struct IconFileInfo icon_pic =
 129   {
 130     "rocks_icon.xbm",
 131     "rocks_iconmask.xbm"
 132   };
 133 #endif
 134 #endif
 135
 136   screen_width = XDisplayWidth(display, screen);
 137   screen_height = XDisplayHeight(display, screen);
 138
 139   win_xpos = (screen_width - width) / 2;
 140   win_ypos = (screen_height - height) / 2;
 141
 142   window = XCreateSimpleWindow(display, RootWindow(display, screen),
 143                                win_xpos, win_ypos, width, height, border_width,
 144                                pen_fg, pen_bg);
 145
 146 #if !defined(PLATFORM_MSDOS)
 147   proto_atom = XInternAtom(display, "WM_PROTOCOLS", FALSE);
 148   delete_atom = XInternAtom(display, "WM_DELETE_WINDOW", FALSE);
 149   if ((proto_atom != None) && (delete_atom != None))
 150     XChangeProperty(display, window, proto_atom, XA_ATOM, 32,
 151                     PropModePrepend, (unsigned char *) &delete_atom, 1);
 152
 153 #if 0
 154   sprintf(icon_filename, "%s/%s/%s",
 155           options.ro_base_directory, GRAPHICS_DIRECTORY,
 156           icon_pic.picture_filename);
 157 #endif
 158   XReadBitmapFile(display, window, program.x11_icon_filename,
 159                   &icon_width, &icon_height,
 160                   &icon_pixmap, &icon_hot_x, &icon_hot_y);
 161   if (!icon_pixmap)
 162     Error(ERR_EXIT, "cannot read icon bitmap file '%s'", icon_filename);
 163
 164 #if 0
 165   sprintf(icon_filename, "%s/%s/%s",
 166           options.ro_base_directory, GRAPHICS_DIRECTORY,
 167           icon_pic.picturemask_filename);
 168 #endif
 169   XReadBitmapFile(display, window, program.x11_iconmask_filename,
 170                   &icon_width, &icon_height,
 171                   &iconmask_pixmap, &icon_hot_x, &icon_hot_y);
 172   if (!iconmask_pixmap)
 173     Error(ERR_EXIT, "cannot read icon bitmap file '%s'", icon_filename);
 174
 175   size_hints.width  = size_hints.min_width  = size_hints.max_width  = width;
 176   size_hints.height = size_hints.min_height = size_hints.max_height = height;
 177   size_hints.flags = PSize | PMinSize | PMaxSize;
 178
 179   if (win_xpos || win_ypos)
 180   {
 181     size_hints.x = win_xpos;
 182     size_hints.y = win_ypos;
 183     size_hints.flags |= PPosition;
 184   }
 185
 186   if (!XStringListToTextProperty(&window_name, 1, &windowName))
 187     Error(ERR_EXIT, "structure allocation for windowName failed");
 188
 189   if (!XStringListToTextProperty(&icon_name, 1, &iconName))
 190     Error(ERR_EXIT, "structure allocation for iconName failed");
 191
 192   wm_hints.initial_state = NormalState;
 193   wm_hints.input = True;
 194   wm_hints.icon_pixmap = icon_pixmap;
 195   wm_hints.icon_mask = iconmask_pixmap;
 196   wm_hints.flags = StateHint | IconPixmapHint | IconMaskHint | InputHint;
 197
 198   class_hints.res_name = program.command_name;
 199   class_hints.res_class = program.program_title;
 200
 201   XSetWMProperties(display, window, &windowName, &iconName,
 202                    NULL, 0, &size_hints, &wm_hints,
 203                    &class_hints);
 204
 205   XFree(windowName.value);
 206   XFree(iconName.value);
 207
 208   /* Select event types wanted */
 209   window_event_mask =
 210     ExposureMask | StructureNotifyMask | FocusChangeMask |
 211     ButtonPressMask | ButtonReleaseMask | PointerMotionMask |
 212     PointerMotionHintMask | KeyPressMask | KeyReleaseMask;
 213
 214   XSelectInput(display, window, window_event_mask);
 215 #endif
 216
 217   /* create GC for drawing with window depth and background color (black) */
 218   gc_values.graphics_exposures = False;
 219   gc_values.foreground = pen_bg;
 220   gc_values.background = pen_bg;
 221   gc_valuemask = GCGraphicsExposures | GCForeground | GCBackground;
 222   gc = XCreateGC(display, window, gc_valuemask, &gc_values);
 223
 224   return window;
 225 }
 226
 227 #endif /* TARGET_X11 */