vid_glx.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18 */
  19
  20 //#include <termios.h>
  21 //#include <sys/ioctl.h>
  22 //#include <sys/stat.h>
  23 //#include <sys/vt.h>
  24 //#include <stdarg.h>
  25 //#include <stdio.h>
  26 #include <signal.h>
  27
  28 #include <dlfcn.h>
  29
  30 #include <X11/Xlib.h>
  31 #include <X11/Xutil.h>
  32 #include <GL/glx.h>
  33
  34 #include <X11/keysym.h>
  35 #include <X11/cursorfont.h>
  36
  37 #include <X11/extensions/XShm.h>
  38 #if !defined(__APPLE__) && !defined(__MACH__)
  39 #include <X11/extensions/xf86dga.h>
  40 #endif
  41 #include <X11/extensions/xf86vmode.h>
  42
  43 #include "quakedef.h"
  44
  45 //GLX prototypes
  46 XVisualInfo *(GLAPIENTRY *qglXChooseVisual)(Display *dpy, int screen, int *attribList);
  47 GLXContext (GLAPIENTRY *qglXCreateContext)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct);
  48 void (GLAPIENTRY *qglXDestroyContext)(Display *dpy, GLXContext ctx);
  49 Bool (GLAPIENTRY *qglXMakeCurrent)(Display *dpy, GLXDrawable drawable, GLXContext ctx);
  50 void (GLAPIENTRY *qglXSwapBuffers)(Display *dpy, GLXDrawable drawable);
  51 const char *(GLAPIENTRY *qglXQueryExtensionsString)(Display *dpy, int screen);
  52
  53 //GLX_ARB_get_proc_address
  54 void *(GLAPIENTRY *qglXGetProcAddressARB)(const GLubyte *procName);
  55
  56 static dllfunction_t getprocaddressfuncs[] =
  57 {
  58         {"glXGetProcAddressARB", (void **) &qglXGetProcAddressARB},
  59         {NULL, NULL}
  60 };
  61
  62 //GLX_SGI_video_sync
  63 GLint (GLAPIENTRY *qglXGetVideoSyncSGI)(GLuint *count);
  64 GLint (GLAPIENTRY *qglXWaitVideoSyncSGI)(GLint divisor, GLint remainder, GLuint *count);
  65
  66 static dllfunction_t videosyncfuncs[] =
  67 {
  68         {"glXGetVideoSyncSGI", (void **) &qglXGetVideoSyncSGI},
  69         {"glXWaitVideoSyncSGI", (void **) &qglXWaitVideoSyncSGI},
  70         {NULL, NULL}
  71 };
  72
  73 static Display *vidx11_display = NULL;
  74 static int vidx11_screen;
  75 static Window win;
  76 static GLXContext ctx = NULL;
  77
  78 Atom wm_delete_window_atom;
  79
  80 #define KEY_MASK (KeyPressMask | KeyReleaseMask)
  81 #define MOUSE_MASK (ButtonPressMask | ButtonReleaseMask | \
  82                     PointerMotionMask | ButtonMotionMask)
  83 #define X_MASK (KEY_MASK | MOUSE_MASK | VisibilityChangeMask | \
  84                 StructureNotifyMask | FocusChangeMask | EnterWindowMask | \
  85                 LeaveWindowMask)
  86
  87
  88 static qboolean         mouse_avail = true;
  89 static qboolean         mouse_active = false, usingmouse = false;
  90 static float    mouse_x, mouse_y;
  91 static int p_mouse_x, p_mouse_y;
  92
  93 #ifndef __APPLE__
  94 cvar_t vid_dga = {CVAR_SAVE, "vid_dga", "1"};
  95 cvar_t vid_dga_mouseaccel = {0, "vid_dga_mouseaccel", "1"};
  96 #endif
  97
  98 qboolean vidmode_ext = false;
  99
 100 static int win_x, win_y;
 101
 102 static int scr_width, scr_height;
 103
 104 static XF86VidModeModeInfo **vidmodes;
 105 static int num_vidmodes;
 106 static qboolean vidmode_active = false;
 107
 108 static Visual *vidx11_visual;
 109 static Colormap vidx11_colormap;
 110
 111 /*-----------------------------------------------------------------------*/
 112
 113 static int XLateKey(XKeyEvent *ev, char *ascii)
 114 {
 115         int key = 0;
 116         char buf[64];
 117         KeySym keysym, shifted;
 118
 119         keysym = XLookupKeysym (ev, 0);
 120         XLookupString(ev, buf, sizeof buf, &shifted, 0);
 121         *ascii = buf[0];
 122
 123         switch(keysym)
 124         {
 125                 case XK_KP_Page_Up:      key = K_KP_PGUP; break;
 126                 case XK_Page_Up:         key = K_PGUP; break;
 127
 128                 case XK_KP_Page_Down: key = K_KP_PGDN; break;
 129                 case XK_Page_Down:       key = K_PGDN; break;
 130
 131                 case XK_KP_Home: key = K_KP_HOME; break;
 132                 case XK_Home:    key = K_HOME; break;
 133
 134                 case XK_KP_End:  key = K_KP_END; break;
 135                 case XK_End:     key = K_END; break;
 136
 137                 case XK_KP_Left: key = K_KP_LEFTARROW; break;
 138                 case XK_Left:    key = K_LEFTARROW; break;
 139
 140                 case XK_KP_Right: key = K_KP_RIGHTARROW; break;
 141                 case XK_Right:  key = K_RIGHTARROW;             break;
 142
 143                 case XK_KP_Down: key = K_KP_DOWNARROW; break;
 144                 case XK_Down:    key = K_DOWNARROW; break;
 145
 146                 case XK_KP_Up:   key = K_KP_UPARROW; break;
 147                 case XK_Up:              key = K_UPARROW;        break;
 148
 149                 case XK_Escape: key = K_ESCAPE;         break;
 150
 151                 case XK_KP_Enter: key = K_KP_ENTER;     break;
 152                 case XK_Return: key = K_ENTER;           break;
 153
 154                 case XK_Tab:            key = K_TAB;                     break;
 155
 156                 case XK_F1:              key = K_F1;                            break;
 157
 158                 case XK_F2:              key = K_F2;                            break;
 159
 160                 case XK_F3:              key = K_F3;                            break;
 161
 162                 case XK_F4:              key = K_F4;                            break;
 163
 164                 case XK_F5:              key = K_F5;                            break;
 165
 166                 case XK_F6:              key = K_F6;                            break;
 167
 168                 case XK_F7:              key = K_F7;                            break;
 169
 170                 case XK_F8:              key = K_F8;                            break;
 171
 172                 case XK_F9:              key = K_F9;                            break;
 173
 174                 case XK_F10:            key = K_F10;                     break;
 175
 176                 case XK_F11:            key = K_F11;                     break;
 177
 178                 case XK_F12:            key = K_F12;                     break;
 179
 180                 case XK_BackSpace: key = K_BACKSPACE; break;
 181
 182                 case XK_KP_Delete: key = K_KP_DEL; break;
 183                 case XK_Delete: key = K_DEL; break;
 184
 185                 case XK_Pause:  key = K_PAUSE;           break;
 186
 187                 case XK_Shift_L:
 188                 case XK_Shift_R:        key = K_SHIFT;          break;
 189
 190                 case XK_Execute:
 191                 case XK_Control_L:
 192                 case XK_Control_R:      key = K_CTRL;            break;
 193
 194                 case XK_Alt_L:
 195                 case XK_Meta_L:
 196                 case XK_Alt_R:
 197                 case XK_Meta_R: key = K_ALT;                    break;
 198
 199                 case XK_KP_Begin: key = K_KP_5; break;
 200
 201                 case XK_Insert:key = K_INS; break;
 202                 case XK_KP_Insert: key = K_KP_INS; break;
 203
 204                 case XK_KP_Multiply: key = '*'; break;
 205                 case XK_KP_Add:  key = K_KP_PLUS; break;
 206                 case XK_KP_Subtract: key = K_KP_MINUS; break;
 207                 case XK_KP_Divide: key = K_KP_SLASH; break;
 208
 209                 default:
 210                         if (keysym < 32 && keysym > 126)
 211                                 break;
 212
 213                         if (keysym >= 'A' && keysym <= 'Z')
 214                                 key = keysym - 'A' + 'a';
 215                         else
 216                                 key = keysym;
 217
 218                         break;
 219         }
 220
 221         return key;
 222 }
 223
 224 static Cursor CreateNullCursor(Display *display, Window root)
 225 {
 226         Pixmap cursormask;
 227         XGCValues xgc;
 228         GC gc;
 229         XColor dummycolour;
 230         Cursor cursor;
 231
 232         cursormask = XCreatePixmap(display, root, 1, 1, 1);
 233         xgc.function = GXclear;
 234         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
 235         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
 236         dummycolour.pixel = 0;
 237         dummycolour.red = 0;
 238         dummycolour.flags = 04;
 239         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
 240         XFreePixmap(display,cursormask);
 241         XFreeGC(display,gc);
 242         return cursor;
 243 }
 244
 245 static void install_grabs(void)
 246 {
 247         XWindowAttributes attribs_1;
 248         XSetWindowAttributes attribs_2;
 249
 250         XGetWindowAttributes(vidx11_display, win, &attribs_1);
 251         attribs_2.event_mask = attribs_1.your_event_mask | KEY_MASK | MOUSE_MASK;
 252         XChangeWindowAttributes(vidx11_display, win, CWEventMask, &attribs_2);
 253
 254 // inviso cursor
 255         XDefineCursor(vidx11_display, win, CreateNullCursor(vidx11_display, win));
 256
 257         XGrabPointer(vidx11_display, win,  True, 0, GrabModeAsync, GrabModeAsync, win, None, CurrentTime);
 258
 259 #ifndef __APPLE__
 260         if (vid_dga.integer)
 261         {
 262                 int MajorVersion, MinorVersion;
 263
 264                 if (!XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 265                 {
 266                         // unable to query, probalby not supported
 267                         Con_Printf( "Failed to detect XF86DGA Mouse\n" );
 268                         vid_dga.integer = 0;
 269                 }
 270                 else
 271                 {
 272                         vid_dga.integer = 1;
 273                         XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
 274                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 275                 }
 276         }
 277         else
 278 #endif
 279                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, scr_width / 2, scr_height / 2);
 280
 281         XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 282
 283         mouse_active = true;
 284         mouse_x = mouse_y = 0;
 285 }
 286
 287 static void uninstall_grabs(void)
 288 {
 289         if (!vidx11_display || !win)
 290                 return;
 291
 292 #ifndef __APPLE__
 293         if (vid_dga.integer == 1)
 294                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
 295 #endif
 296
 297         XUngrabPointer(vidx11_display, CurrentTime);
 298         XUngrabKeyboard(vidx11_display, CurrentTime);
 299
 300 // inviso cursor
 301         XUndefineCursor(vidx11_display, win);
 302
 303         mouse_active = false;
 304 }
 305
 306 static void HandleEvents(void)
 307 {
 308         XEvent event;
 309         int key;
 310         char ascii;
 311         qboolean dowarp = false;
 312
 313         if (!vidx11_display)
 314                 return;
 315
 316         while (XPending(vidx11_display))
 317         {
 318                 XNextEvent(vidx11_display, &event);
 319
 320                 switch (event.type)
 321                 {
 322                 case KeyPress:
 323                         // key pressed
 324                         key = XLateKey (&event.xkey, &ascii);
 325                         Key_Event(key, ascii, true);
 326                         break;
 327
 328                 case KeyRelease:
 329                         // key released
 330                         key = XLateKey (&event.xkey, &ascii);
 331                         Key_Event(key, ascii, false);
 332                         break;
 333
 334                 case MotionNotify:
 335                         // mouse moved
 336                         if (usingmouse)
 337                         {
 338 #ifndef __APPLE__
 339                                 if (vid_dga.integer == 1)
 340                                 {
 341                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
 342                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
 343                                 }
 344                                 else
 345 #endif
 346                                 {
 347
 348                                         if (!event.xmotion.send_event)
 349                                         {
 350                                                 mouse_x += event.xmotion.x - p_mouse_x;
 351                                                 mouse_y += event.xmotion.y - p_mouse_y;
 352                                                 if (abs(scr_width/2 - event.xmotion.x) > scr_width / 4 || abs(scr_height/2 - event.xmotion.y) > scr_height / 4)
 353                                                         dowarp = true;
 354                                         }
 355                                         p_mouse_x = event.xmotion.x;
 356                                         p_mouse_y = event.xmotion.y;
 357                                 }
 358                         }
 359                         //else
 360                         //      ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 361                         break;
 362
 363                 case ButtonPress:
 364                         // mouse button pressed
 365                         switch(event.xbutton.button)
 366                         {
 367                         case 1:
 368                                 Key_Event(K_MOUSE1, 0, true);
 369                                 break;
 370                         case 2:
 371                                 Key_Event(K_MOUSE3, 0, true);
 372                                 break;
 373                         case 3:
 374                                 Key_Event(K_MOUSE2, 0, true);
 375                                 break;
 376                         case 4:
 377                                 Key_Event(K_MWHEELUP, 0, true);
 378                                 break;
 379                         case 5:
 380                                 Key_Event(K_MWHEELDOWN, 0, true);
 381                                 break;
 382                         case 6:
 383                                 Key_Event(K_MOUSE4, 0, true);
 384                                 break;
 385                         case 7:
 386                                 Key_Event(K_MOUSE5, 0, true);
 387                                 break;
 388                         case 8:
 389                                 Key_Event(K_MOUSE6, 0, true);
 390                                 break;
 391                         case 9:
 392                                 Key_Event(K_MOUSE7, 0, true);
 393                                 break;
 394                         case 10:
 395                                 Key_Event(K_MOUSE8, 0, true);
 396                                 break;
 397                         case 11:
 398                                 Key_Event(K_MOUSE9, 0, true);
 399                                 break;
 400                         case 12:
 401                                 Key_Event(K_MOUSE10, 0, true);
 402                                 break;
 403                         default:
 404                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-12 expected\n", event.xbutton.button);
 405                                 break;
 406                         }
 407                         break;
 408
 409                 case ButtonRelease:
 410                         // mouse button released
 411                         switch(event.xbutton.button)
 412                         {
 413                         case 1:
 414                                 Key_Event(K_MOUSE1, 0, false);
 415                                 break;
 416                         case 2:
 417                                 Key_Event(K_MOUSE3, 0, false);
 418                                 break;
 419                         case 3:
 420                                 Key_Event(K_MOUSE2, 0, false);
 421                                 break;
 422                         case 4:
 423                                 Key_Event(K_MWHEELUP, 0, false);
 424                                 break;
 425                         case 5:
 426                                 Key_Event(K_MWHEELDOWN, 0, false);
 427                                 break;
 428                         case 6:
 429                                 Key_Event(K_MOUSE4, 0, false);
 430                                 break;
 431                         case 7:
 432                                 Key_Event(K_MOUSE5, 0, false);
 433                                 break;
 434                         case 8:
 435                                 Key_Event(K_MOUSE6, 0, false);
 436                                 break;
 437                         case 9:
 438                                 Key_Event(K_MOUSE7, 0, false);
 439                                 break;
 440                         case 10:
 441                                 Key_Event(K_MOUSE8, 0, false);
 442                                 break;
 443                         case 11:
 444                                 Key_Event(K_MOUSE9, 0, false);
 445                                 break;
 446                         case 12:
 447                                 Key_Event(K_MOUSE10, 0, false);
 448                                 break;
 449                         default:
 450                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-12 expected\n", event.xbutton.button);
 451                                 break;
 452                         }
 453                         break;
 454
 455                 case CreateNotify:
 456                         // window created
 457                         win_x = event.xcreatewindow.x;
 458                         win_y = event.xcreatewindow.y;
 459                         break;
 460
 461                 case ConfigureNotify:
 462                         // window changed size/location
 463                         win_x = event.xconfigure.x;
 464                         win_y = event.xconfigure.y;
 465                         break;
 466                 case DestroyNotify:
 467                         // window has been destroyed
 468                         Sys_Quit();
 469                         break;
 470                 case ClientMessage:
 471                         // window manager messages
 472                         if ((event.xclient.format == 32) && ((unsigned int)event.xclient.data.l[0] == wm_delete_window_atom))
 473                                 Sys_Quit();
 474                         break;
 475                 case MapNotify:
 476                         // window restored
 477                         vid_hidden = false;
 478                         vid_activewindow = false;
 479                         VID_RestoreSystemGamma();
 480                         break;
 481                 case UnmapNotify:
 482                         // window iconified/rolledup/whatever
 483                         vid_hidden = true;
 484                         vid_activewindow = false;
 485                         VID_RestoreSystemGamma();
 486                         break;
 487                 case FocusIn:
 488                         // window is now the input focus
 489                         vid_activewindow = true;
 490                         break;
 491                 case FocusOut:
 492                         // window is no longer the input focus
 493                         vid_activewindow = false;
 494                         VID_RestoreSystemGamma();
 495                         break;
 496                 case EnterNotify:
 497                         // mouse entered window
 498                         break;
 499                 case LeaveNotify:
 500                         // mouse left window
 501                         break;
 502                 }
 503         }
 504
 505         if (dowarp)
 506         {
 507                 /* move the mouse to the window center again */
 508                 p_mouse_x = scr_width / 2;
 509                 p_mouse_y = scr_height / 2;
 510                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 511         }
 512
 513 }
 514
 515 static void IN_DeactivateMouse( void )
 516 {
 517         if (!mouse_avail || !vidx11_display || !win)
 518                 return;
 519
 520         if (mouse_active)
 521         {
 522                 uninstall_grabs();
 523                 mouse_active = false;
 524         }
 525 }
 526
 527 static void IN_ActivateMouse( void )
 528 {
 529         if (!mouse_avail || !vidx11_display || !win)
 530                 return;
 531
 532         if (!mouse_active)
 533         {
 534                 mouse_x = mouse_y = 0; // don't spazz
 535                 install_grabs();
 536                 mouse_active = true;
 537         }
 538 }
 539
 540 void VID_Shutdown(void)
 541 {
 542         if (!ctx || !vidx11_display)
 543                 return;
 544
 545         vid_hidden = true;
 546         usingmouse = false;
 547         if (vidx11_display)
 548         {
 549                 VID_RestoreSystemGamma();
 550                 uninstall_grabs();
 551
 552                 // FIXME: glXDestroyContext here?
 553                 if (vidmode_active)
 554                         XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[0]);
 555                 if (win)
 556                         XDestroyWindow(vidx11_display, win);
 557                 XCloseDisplay(vidx11_display);
 558         }
 559         vidmode_active = false;
 560         vidx11_display = NULL;
 561         win = 0;
 562         ctx = NULL;
 563
 564         GL_CloseLibrary();
 565         Key_ClearStates ();
 566 }
 567
 568 void signal_handler(int sig)
 569 {
 570         printf("Received signal %d, exiting...\n", sig);
 571         VID_RestoreSystemGamma();
 572         Sys_Quit();
 573         exit(0);
 574 }
 575
 576 void InitSig(void)
 577 {
 578         signal(SIGHUP, signal_handler);
 579         signal(SIGINT, signal_handler);
 580         signal(SIGQUIT, signal_handler);
 581         signal(SIGILL, signal_handler);
 582         signal(SIGTRAP, signal_handler);
 583         signal(SIGIOT, signal_handler);
 584         signal(SIGBUS, signal_handler);
 585         signal(SIGFPE, signal_handler);
 586         signal(SIGSEGV, signal_handler);
 587         signal(SIGTERM, signal_handler);
 588 }
 589
 590 /*
 591 =================
 592 VID_GetWindowSize
 593 =================
 594 */
 595 void VID_GetWindowSize (int *x, int *y, int *width, int *height)
 596 {
 597         *x = *y = 0;
 598         *width = scr_width;
 599         *height = scr_height;
 600 }
 601
 602 void VID_Finish (void)
 603 {
 604         int usemouse;
 605         if (r_render.integer)
 606         {
 607                 qglFinish();
 608                 qglXSwapBuffers(vidx11_display, win);
 609         }
 610
 611 // handle the mouse state when windowed if that's changed
 612         usemouse = false;
 613         if (vid_mouse.integer && !key_consoleactive)
 614                 usemouse = true;
 615         if (vidmode_active)
 616                 usemouse = true;
 617         if (usemouse)
 618         {
 619                 if (!usingmouse)
 620                 {
 621                         usingmouse = true;
 622                         IN_ActivateMouse ();
 623                 }
 624         }
 625         else
 626         {
 627                 if (usingmouse)
 628                 {
 629                         usingmouse = false;
 630                         IN_DeactivateMouse ();
 631                 }
 632         }
 633 }
 634
 635 int VID_SetGamma(unsigned short *ramps)
 636 {
 637         return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 638 }
 639
 640 int VID_GetGamma(unsigned short *ramps)
 641 {
 642         return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 643 }
 644
 645 void VID_Init(void)
 646 {
 647 #ifndef __APPLE__
 648         Cvar_RegisterVariable (&vid_dga);
 649         Cvar_RegisterVariable (&vid_dga_mouseaccel);
 650 #endif
 651         InitSig(); // trap evil signals
 652         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
 653                 mouse_avail = false;
 654 }
 655
 656 void VID_BuildGLXAttrib(int *attrib, int stencil)
 657 {
 658         *attrib++ = GLX_RGBA;
 659         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 660         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 661         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 662         *attrib++ = GLX_DOUBLEBUFFER;
 663         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 664         // if stencil is enabled, ask for alpha too
 665         if (stencil)
 666         {
 667                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 668                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
 669         }
 670         *attrib++ = None;
 671 }
 672
 673 int VID_InitMode(int fullscreen, int width, int height, int bpp)
 674 {
 675         int i;
 676         int attrib[32];
 677         XSetWindowAttributes attr;
 678         unsigned long mask;
 679         Window root;
 680         XVisualInfo *visinfo;
 681         int MajorVersion, MinorVersion;
 682         const char *drivername;
 683
 684 #if defined(__APPLE__) && defined(__MACH__)
 685         drivername = "/usr/X11R6/lib/libGL.1.dylib";
 686 #else
 687         drivername = "libGL.so.1";
 688 #endif
 689         i = COM_CheckParm("-gl_driver");
 690         if (i && i < com_argc - 1)
 691                 drivername = com_argv[i + 1];
 692         if (!GL_OpenLibrary(drivername))
 693         {
 694                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 695                 return false;
 696         }
 697
 698         if (!(vidx11_display = XOpenDisplay(NULL)))
 699         {
 700                 Con_Printf("Couldn't open the X display\n");
 701                 return false;
 702         }
 703
 704         vidx11_screen = DefaultScreen(vidx11_display);
 705         root = RootWindow(vidx11_display, vidx11_screen);
 706
 707         // Get video mode list
 708         MajorVersion = MinorVersion = 0;
 709         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 710                 vidmode_ext = false;
 711         else
 712         {
 713                 Con_DPrintf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 714                 vidmode_ext = true;
 715         }
 716
 717         if ((qglXChooseVisual = GL_GetProcAddress("glXChooseVisual")) == NULL
 718          || (qglXCreateContext = GL_GetProcAddress("glXCreateContext")) == NULL
 719          || (qglXMakeCurrent = GL_GetProcAddress("glXMakeCurrent")) == NULL
 720          || (qglXSwapBuffers = GL_GetProcAddress("glXSwapBuffers")) == NULL
 721          || (qglXQueryExtensionsString = GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 722         {
 723                 Con_Printf("glX functions not found in %s\n", gl_driver);
 724                 return false;
 725         }
 726
 727         VID_BuildGLXAttrib(attrib, bpp == 32);
 728         visinfo = qglXChooseVisual(vidx11_display, vidx11_screen, attrib);
 729         if (!visinfo)
 730         {
 731                 Con_Printf("Couldn't get an RGB, Double-buffered, Depth visual\n");
 732                 return false;
 733         }
 734
 735         if (vidmode_ext)
 736         {
 737                 int best_fit, best_dist, dist, x, y;
 738
 739                 // Are we going fullscreen?  If so, let's change video mode
 740                 if (fullscreen)
 741                 {
 742                         XF86VidModeGetAllModeLines(vidx11_display, vidx11_screen, &num_vidmodes, &vidmodes);
 743                         best_dist = 9999999;
 744                         best_fit = -1;
 745
 746                         for (i = 0; i < num_vidmodes; i++)
 747                         {
 748                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
 749                                         continue;
 750
 751                                 x = width - vidmodes[i]->hdisplay;
 752                                 y = height - vidmodes[i]->vdisplay;
 753                                 dist = (x * x) + (y * y);
 754                                 if (dist < best_dist)
 755                                 {
 756                                         best_dist = dist;
 757                                         best_fit = i;
 758                                 }
 759                         }
 760
 761                         if (best_fit != -1)
 762                         {
 763                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
 764                                 // to width/height =, so the window will take the full area of
 765                                 // the mode chosen
 766                                 width = vidmodes[best_fit]->hdisplay;
 767                                 height = vidmodes[best_fit]->vdisplay;
 768
 769                                 // change to the mode
 770                                 XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[best_fit]);
 771                                 vidmode_active = true;
 772
 773                                 // Move the viewport to top left
 774                                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 775                         }
 776                         else
 777                                 fullscreen = 0;
 778                 }
 779         }
 780
 781         // LordHavoc: save the visual for use in gamma ramp settings later
 782         vidx11_visual = visinfo->visual;
 783
 784         /* window attributes */
 785         attr.background_pixel = 0;
 786         attr.border_pixel = 0;
 787         // LordHavoc: save the colormap for later, too
 788         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 789         attr.event_mask = X_MASK;
 790         if (vidmode_active)
 791         {
 792                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 793                 attr.override_redirect = True;
 794                 attr.backing_store = NotUseful;
 795                 attr.save_under = False;
 796         }
 797         else
 798                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 799
 800         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 801         XStoreName(vidx11_display, win, gamename);
 802         XMapWindow(vidx11_display, win);
 803
 804         // LordHavoc: making the close button on a window do the right thing
 805         // seems to involve this mess, sigh...
 806         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 807         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 808
 809         if (vidmode_active)
 810         {
 811                 XMoveWindow(vidx11_display, win, 0, 0);
 812                 XRaiseWindow(vidx11_display, win);
 813                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 814                 XFlush(vidx11_display);
 815                 // Move the viewport to top left
 816                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 817         }
 818
 819         //XSync(vidx11_display, False);
 820
 821         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 822         if (!ctx)
 823                 Sys_Error ("glXCreateContext failed\n");
 824
 825         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 826                 Sys_Error ("glXMakeCurrent failed\n");
 827
 828         XSync(vidx11_display, False);
 829
 830         scr_width = width;
 831         scr_height = height;
 832
 833         if ((qglGetString = GL_GetProcAddress("glGetString")) == NULL)
 834                 Sys_Error("glGetString not found in %s", gl_driver);
 835
 836         gl_renderer = qglGetString(GL_RENDERER);
 837         gl_vendor = qglGetString(GL_VENDOR);
 838         gl_version = qglGetString(GL_VERSION);
 839         gl_extensions = qglGetString(GL_EXTENSIONS);
 840         gl_platform = "GLX";
 841         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, vidx11_screen);
 842
 843         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 844         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_video_sync", videosyncfuncs, "-novideosync", false);
 845
 846         usingmouse = false;
 847         vid_hidden = false;
 848         vid_activewindow = true;
 849         GL_Init();
 850         return true;
 851 }
 852
 853 void Sys_SendKeyEvents(void)
 854 {
 855         HandleEvents();
 856 }
 857
 858 /*
 859 ===========
 860 IN_Commands
 861 ===========
 862 */
 863 void IN_Commands (void)
 864 {
 865 }
 866
 867 void IN_Move (usercmd_t *cmd)
 868 {
 869         if (mouse_avail)
 870                 IN_Mouse(cmd, mouse_x, mouse_y);
 871         mouse_x = 0;
 872         mouse_y = 0;
 873 }
 874
 875 static void *prjobj = NULL;
 876
 877 int GL_OpenLibrary(const char *name)
 878 {
 879         Con_Printf("Loading OpenGL driver %s\n", name);
 880         GL_CloseLibrary();
 881         if (!(prjobj = dlopen(name, RTLD_LAZY)))
 882         {
 883                 Con_Printf("Unable to open symbol list for %s\n", name);
 884                 return false;
 885         }
 886         strcpy(gl_driver, name);
 887         return true;
 888 }
 889
 890 void GL_CloseLibrary(void)
 891 {
 892         if (prjobj)
 893                 dlclose(prjobj);
 894         prjobj = NULL;
 895         gl_driver[0] = 0;
 896         qglXGetProcAddressARB = NULL;
 897         gl_extensions = "";
 898         gl_platform = "";
 899         gl_platformextensions = "";
 900 }
 901
 902 void *GL_GetProcAddress(const char *name)
 903 {
 904         void *p = NULL;
 905         if (qglXGetProcAddressARB != NULL)
 906                 p = (void *) qglXGetProcAddressARB(name);
 907         if (p == NULL)
 908                 p = (void *) dlsym(prjobj, name);
 909         return p;
 910 }
 911