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 #include "main_TMP.h"
  20
  21 struct IconFileInfo
  22 {
  23   char *picture_filename;
  24   char *picturemask_filename;
  25 };
  26
  27 static void X11InitDisplay()
  28 {
  29 #if !defined(PLATFORM_MSDOS)
  30   XVisualInfo vinfo_template, *vinfo;
  31   int num_visuals;
  32 #endif
  33   unsigned int depth;
  34
  35   /* connect to X server */
  36   if (!(display = XOpenDisplay(options.display_name)))
  37     Error(ERR_EXIT, "cannot connect to X server %s",
  38           XDisplayName(options.display_name));
  39
  40   screen = DefaultScreen(display);
  41   visual = DefaultVisual(display, screen);
  42   depth  = DefaultDepth(display, screen);
  43   cmap   = DefaultColormap(display, screen);
  44
  45 #if !defined(PLATFORM_MSDOS)
  46   /* look for good enough visual */
  47   vinfo_template.screen = screen;
  48   vinfo_template.class = (depth == 8 ? PseudoColor : TrueColor);
  49   vinfo_template.depth = depth;
  50   if ((vinfo = XGetVisualInfo(display, VisualScreenMask | VisualClassMask |
  51                               VisualDepthMask, &vinfo_template, &num_visuals)))
  52   {
  53     visual = vinfo->visual;
  54     XFree((void *)vinfo);
  55   }
  56
  57   /* got appropriate visual? */
  58   if (depth < 8)
  59   {
  60     printf("Sorry, displays with less than 8 bits per pixel not supported.\n");
  61     exit(-1);
  62   }
  63   else if ((depth ==8 && visual->class != PseudoColor) ||
  64            (depth > 8 && visual->class != TrueColor &&
  65             visual->class != DirectColor))
  66   {
  67     printf("Sorry, cannot get appropriate visual.\n");
  68     exit(-1);
  69   }
  70 #endif /* !PLATFORM_MSDOS */
  71 }
  72
  73 static DrawWindow X11InitWindow()
  74 {
  75   Window window;
  76   unsigned int border_width = 4;
  77   XGCValues gc_values;
  78   unsigned long gc_valuemask;
  79 #if !defined(PLATFORM_MSDOS)
  80   XTextProperty windowName, iconName;
  81   Pixmap icon_pixmap, iconmask_pixmap;
  82   unsigned int icon_width, icon_height;
  83   int icon_hot_x, icon_hot_y;
  84   char icon_filename[256];
  85   XSizeHints size_hints;
  86   XWMHints wm_hints;
  87   XClassHint class_hints;
  88   char *window_name = WINDOW_TITLE_STRING;
  89   char *icon_name = WINDOW_TITLE_STRING;
  90   long window_event_mask;
  91   Atom proto_atom = None, delete_atom = None;
  92 #endif
  93   int screen_width, screen_height;
  94   int win_xpos = WIN_XPOS, win_ypos = WIN_YPOS;
  95   unsigned long pen_fg = WhitePixel(display,screen);
  96   unsigned long pen_bg = BlackPixel(display,screen);
  97   const int width = WIN_XSIZE, height = WIN_YSIZE;
  98
  99 #if !defined(PLATFORM_MSDOS)
 100   static struct IconFileInfo icon_pic =
 101   {
 102     "rocks_icon.xbm",
 103     "rocks_iconmask.xbm"
 104   };
 105 #endif
 106
 107   screen_width = XDisplayWidth(display, screen);
 108   screen_height = XDisplayHeight(display, screen);
 109
 110   win_xpos = (screen_width - width) / 2;
 111   win_ypos = (screen_height - height) / 2;
 112
 113   window = XCreateSimpleWindow(display, RootWindow(display, screen),
 114                                win_xpos, win_ypos, width, height, border_width,
 115                                pen_fg, pen_bg);
 116
 117 #if !defined(PLATFORM_MSDOS)
 118   proto_atom = XInternAtom(display, "WM_PROTOCOLS", FALSE);
 119   delete_atom = XInternAtom(display, "WM_DELETE_WINDOW", FALSE);
 120   if ((proto_atom != None) && (delete_atom != None))
 121     XChangeProperty(display, window, proto_atom, XA_ATOM, 32,
 122                     PropModePrepend, (unsigned char *) &delete_atom, 1);
 123
 124   sprintf(icon_filename, "%s/%s/%s",
 125           options.ro_base_directory, GRAPHICS_DIRECTORY,
 126           icon_pic.picture_filename);
 127   XReadBitmapFile(display,window,icon_filename,
 128                   &icon_width,&icon_height,
 129                   &icon_pixmap,&icon_hot_x,&icon_hot_y);
 130   if (!icon_pixmap)
 131     Error(ERR_EXIT, "cannot read icon bitmap file '%s'", icon_filename);
 132
 133   sprintf(icon_filename, "%s/%s/%s",
 134           options.ro_base_directory, GRAPHICS_DIRECTORY,
 135           icon_pic.picturemask_filename);
 136   XReadBitmapFile(display,window,icon_filename,
 137                   &icon_width,&icon_height,
 138                   &iconmask_pixmap,&icon_hot_x,&icon_hot_y);
 139   if (!iconmask_pixmap)
 140     Error(ERR_EXIT, "cannot read icon bitmap file '%s'", icon_filename);
 141
 142   size_hints.width  = size_hints.min_width  = size_hints.max_width  = width;
 143   size_hints.height = size_hints.min_height = size_hints.max_height = height;
 144   size_hints.flags = PSize | PMinSize | PMaxSize;
 145
 146   if (win_xpos || win_ypos)
 147   {
 148     size_hints.x = win_xpos;
 149     size_hints.y = win_ypos;
 150     size_hints.flags |= PPosition;
 151   }
 152
 153   if (!XStringListToTextProperty(&window_name, 1, &windowName))
 154     Error(ERR_EXIT, "structure allocation for windowName failed");
 155
 156   if (!XStringListToTextProperty(&icon_name, 1, &iconName))
 157     Error(ERR_EXIT, "structure allocation for iconName failed");
 158
 159   wm_hints.initial_state = NormalState;
 160   wm_hints.input = True;
 161   wm_hints.icon_pixmap = icon_pixmap;
 162   wm_hints.icon_mask = iconmask_pixmap;
 163   wm_hints.flags = StateHint | IconPixmapHint | IconMaskHint | InputHint;
 164
 165   class_hints.res_name = program_name;
 166   class_hints.res_class = "Rocks'n'Diamonds";
 167
 168   XSetWMProperties(display, window, &windowName, &iconName,
 169                    NULL, 0, &size_hints, &wm_hints,
 170                    &class_hints);
 171
 172   XFree(windowName.value);
 173   XFree(iconName.value);
 174
 175   /* Select event types wanted */
 176   window_event_mask =
 177     ExposureMask | StructureNotifyMask | FocusChangeMask |
 178     ButtonPressMask | ButtonReleaseMask | PointerMotionMask |
 179     PointerMotionHintMask | KeyPressMask | KeyReleaseMask;
 180
 181   XSelectInput(display, window, window_event_mask);
 182 #endif
 183
 184   /* create GC for drawing with window depth and background color (black) */
 185   gc_values.graphics_exposures = False;
 186   gc_values.foreground = pen_bg;
 187   gc_values.background = pen_bg;
 188   gc_valuemask = GCGraphicsExposures | GCForeground | GCBackground;
 189   gc = XCreateGC(display, window, gc_valuemask, &gc_values);
 190
 191   return window;
 192 }
 193
 194 inline void X11InitBufferedDisplay(DrawBuffer *backbuffer, DrawWindow *window)
 195 {
 196   X11InitDisplay();
 197   *window = X11InitWindow();
 198
 199   XMapWindow(display, *window);
 200   FlushDisplay();
 201
 202   /* create additional buffer for double-buffering */
 203   *backbuffer = CreateBitmap(WIN_XSIZE, WIN_YSIZE, DEFAULT_DEPTH);
 204   pix[PIX_DB_BACK] = *backbuffer;       /* 'backbuffer' is off-screen buffer */
 205 }
 206
 207 #endif /* TARGET_X11 */