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