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 int cl_available = true;
  46
  47 //GLX prototypes
  48 XVisualInfo *(GLAPIENTRY *qglXChooseVisual)(Display *dpy, int screen, int *attribList);
  49 GLXContext (GLAPIENTRY *qglXCreateContext)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct);
  50 void (GLAPIENTRY *qglXDestroyContext)(Display *dpy, GLXContext ctx);
  51 Bool (GLAPIENTRY *qglXMakeCurrent)(Display *dpy, GLXDrawable drawable, GLXContext ctx);
  52 void (GLAPIENTRY *qglXSwapBuffers)(Display *dpy, GLXDrawable drawable);
  53 const char *(GLAPIENTRY *qglXQueryExtensionsString)(Display *dpy, int screen);
  54
  55 //GLX_ARB_get_proc_address
  56 void *(GLAPIENTRY *qglXGetProcAddressARB)(const GLubyte *procName);
  57
  58 static dllfunction_t getprocaddressfuncs[] =
  59 {
  60         {"glXGetProcAddressARB", (void **) &qglXGetProcAddressARB},
  61         {NULL, NULL}
  62 };
  63
  64 //GLX_SGI_video_sync
  65 GLint (GLAPIENTRY *qglXGetVideoSyncSGI)(GLuint *count);
  66 GLint (GLAPIENTRY *qglXWaitVideoSyncSGI)(GLint divisor, GLint remainder, GLuint *count);
  67
  68 static dllfunction_t videosyncfuncs[] =
  69 {
  70         {"glXGetVideoSyncSGI", (void **) &qglXGetVideoSyncSGI},
  71         {"glXWaitVideoSyncSGI", (void **) &qglXWaitVideoSyncSGI},
  72         {NULL, NULL}
  73 };
  74
  75 static Display *vidx11_display = NULL;
  76 static int vidx11_screen;
  77 static Window win;
  78 static GLXContext ctx = NULL;
  79
  80 Atom wm_delete_window_atom;
  81
  82 #define KEY_MASK (KeyPressMask | KeyReleaseMask)
  83 #define MOUSE_MASK (ButtonPressMask | ButtonReleaseMask | \
  84                     PointerMotionMask | ButtonMotionMask)
  85 #define X_MASK (KEY_MASK | MOUSE_MASK | VisibilityChangeMask | \
  86                 StructureNotifyMask | FocusChangeMask | EnterWindowMask | \
  87                 LeaveWindowMask)
  88
  89
  90 static qboolean         mouse_avail = true;
  91 static qboolean         mouse_active = false, usingmouse = false;
  92 static float    mouse_x, mouse_y;
  93 static int p_mouse_x, p_mouse_y;
  94
  95 #ifndef __APPLE__
  96 cvar_t vid_dga = {CVAR_SAVE, "vid_dga", "1"};
  97 cvar_t vid_dga_mouseaccel = {0, "vid_dga_mouseaccel", "1"};
  98 #endif
  99
 100 qboolean vidmode_ext = false;
 101
 102 static int win_x, win_y;
 103
 104 static int scr_width, scr_height;
 105
 106 static XF86VidModeModeInfo **vidmodes;
 107 static int num_vidmodes;
 108 static qboolean vidmode_active = false;
 109
 110 static Visual *vidx11_visual;
 111 static Colormap vidx11_colormap;
 112
 113 /*-----------------------------------------------------------------------*/
 114
 115 static int XLateKey(XKeyEvent *ev, char *ascii)
 116 {
 117         int key = 0;
 118         char buf[64];
 119         KeySym keysym, shifted;
 120
 121         keysym = XLookupKeysym (ev, 0);
 122         XLookupString(ev, buf, sizeof buf, &shifted, 0);
 123         *ascii = buf[0];
 124
 125         switch(keysym)
 126         {
 127                 case XK_KP_Page_Up:      key = K_KP_PGUP; break;
 128                 case XK_Page_Up:         key = K_PGUP; break;
 129
 130                 case XK_KP_Page_Down: key = K_KP_PGDN; break;
 131                 case XK_Page_Down:       key = K_PGDN; break;
 132
 133                 case XK_KP_Home: key = K_KP_HOME; break;
 134                 case XK_Home:    key = K_HOME; break;
 135
 136                 case XK_KP_End:  key = K_KP_END; break;
 137                 case XK_End:     key = K_END; break;
 138
 139                 case XK_KP_Left: key = K_KP_LEFTARROW; break;
 140                 case XK_Left:    key = K_LEFTARROW; break;
 141
 142                 case XK_KP_Right: key = K_KP_RIGHTARROW; break;
 143                 case XK_Right:  key = K_RIGHTARROW;             break;
 144
 145                 case XK_KP_Down: key = K_KP_DOWNARROW; break;
 146                 case XK_Down:    key = K_DOWNARROW; break;
 147
 148                 case XK_KP_Up:   key = K_KP_UPARROW; break;
 149                 case XK_Up:              key = K_UPARROW;        break;
 150
 151                 case XK_Escape: key = K_ESCAPE;         break;
 152
 153                 case XK_KP_Enter: key = K_KP_ENTER;     break;
 154                 case XK_Return: key = K_ENTER;           break;
 155
 156                 case XK_Tab:            key = K_TAB;                     break;
 157
 158                 case XK_F1:              key = K_F1;                            break;
 159
 160                 case XK_F2:              key = K_F2;                            break;
 161
 162                 case XK_F3:              key = K_F3;                            break;
 163
 164                 case XK_F4:              key = K_F4;                            break;
 165
 166                 case XK_F5:              key = K_F5;                            break;
 167
 168                 case XK_F6:              key = K_F6;                            break;
 169
 170                 case XK_F7:              key = K_F7;                            break;
 171
 172                 case XK_F8:              key = K_F8;                            break;
 173
 174                 case XK_F9:              key = K_F9;                            break;
 175
 176                 case XK_F10:            key = K_F10;                     break;
 177
 178                 case XK_F11:            key = K_F11;                     break;
 179
 180                 case XK_F12:            key = K_F12;                     break;
 181
 182                 case XK_BackSpace: key = K_BACKSPACE; break;
 183
 184                 case XK_KP_Delete: key = K_KP_DEL; break;
 185                 case XK_Delete: key = K_DEL; break;
 186
 187                 case XK_Pause:  key = K_PAUSE;           break;
 188
 189                 case XK_Shift_L:
 190                 case XK_Shift_R:        key = K_SHIFT;          break;
 191
 192                 case XK_Execute:
 193                 case XK_Control_L:
 194                 case XK_Control_R:      key = K_CTRL;            break;
 195
 196                 case XK_Alt_L:
 197                 case XK_Meta_L:
 198                 case XK_Alt_R:
 199                 case XK_Meta_R: key = K_ALT;                    break;
 200
 201                 case XK_KP_Begin: key = K_KP_5; break;
 202
 203                 case XK_Insert:key = K_INS; break;
 204                 case XK_KP_Insert: key = K_KP_INS; break;
 205
 206                 case XK_KP_Multiply: key = '*'; break;
 207                 case XK_KP_Add:  key = K_KP_PLUS; break;
 208                 case XK_KP_Subtract: key = K_KP_MINUS; break;
 209                 case XK_KP_Divide: key = K_KP_SLASH; break;
 210
 211                 default:
 212                         if (keysym < 32 && keysym > 126)
 213                                 break;
 214
 215                         if (keysym >= 'A' && keysym <= 'Z')
 216                                 key = keysym - 'A' + 'a';
 217                         else
 218                                 key = keysym;
 219
 220                         break;
 221         }
 222
 223         return key;
 224 }
 225
 226 static Cursor CreateNullCursor(Display *display, Window root)
 227 {
 228         Pixmap cursormask;
 229         XGCValues xgc;
 230         GC gc;
 231         XColor dummycolour;
 232         Cursor cursor;
 233
 234         cursormask = XCreatePixmap(display, root, 1, 1, 1);
 235         xgc.function = GXclear;
 236         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
 237         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
 238         dummycolour.pixel = 0;
 239         dummycolour.red = 0;
 240         dummycolour.flags = 04;
 241         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
 242         XFreePixmap(display,cursormask);
 243         XFreeGC(display,gc);
 244         return cursor;
 245 }
 246
 247 static void install_grabs(void)
 248 {
 249         XWindowAttributes attribs_1;
 250         XSetWindowAttributes attribs_2;
 251
 252         XGetWindowAttributes(vidx11_display, win, &attribs_1);
 253         attribs_2.event_mask = attribs_1.your_event_mask | KEY_MASK | MOUSE_MASK;
 254         XChangeWindowAttributes(vidx11_display, win, CWEventMask, &attribs_2);
 255
 256 // inviso cursor
 257         XDefineCursor(vidx11_display, win, CreateNullCursor(vidx11_display, win));
 258
 259         XGrabPointer(vidx11_display, win,  True, 0, GrabModeAsync, GrabModeAsync, win, None, CurrentTime);
 260
 261 #ifndef __APPLE__
 262         if (vid_dga.integer)
 263         {
 264                 int MajorVersion, MinorVersion;
 265
 266                 if (!XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 267                 {
 268                         // unable to query, probalby not supported
 269                         Con_Printf( "Failed to detect XF86DGA Mouse\n" );
 270                         vid_dga.integer = 0;
 271                 }
 272                 else
 273                 {
 274                         vid_dga.integer = 1;
 275                         XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
 276                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 277                 }
 278         }
 279         else
 280 #endif
 281                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, scr_width / 2, scr_height / 2);
 282
 283         XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 284
 285         mouse_active = true;
 286         mouse_x = mouse_y = 0;
 287 }
 288
 289 static void uninstall_grabs(void)
 290 {
 291         if (!vidx11_display || !win)
 292                 return;
 293
 294 #ifndef __APPLE__
 295         if (vid_dga.integer == 1)
 296                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
 297 #endif
 298
 299         XUngrabPointer(vidx11_display, CurrentTime);
 300         XUngrabKeyboard(vidx11_display, CurrentTime);
 301
 302 // inviso cursor
 303         XUndefineCursor(vidx11_display, win);
 304
 305         mouse_active = false;
 306 }
 307
 308 static void HandleEvents(void)
 309 {
 310         XEvent event;
 311         int key;
 312         char ascii;
 313         qboolean dowarp = false;
 314
 315         if (!vidx11_display)
 316                 return;
 317
 318         while (XPending(vidx11_display))
 319         {
 320                 XNextEvent(vidx11_display, &event);
 321
 322                 switch (event.type)
 323                 {
 324                 case KeyPress:
 325                         // key pressed
 326                         key = XLateKey (&event.xkey, &ascii);
 327                         Key_Event(key, ascii, true);
 328                         break;
 329
 330                 case KeyRelease:
 331                         // key released
 332                         key = XLateKey (&event.xkey, &ascii);
 333                         Key_Event(key, ascii, false);
 334                         break;
 335
 336                 case MotionNotify:
 337                         // mouse moved
 338                         if (usingmouse)
 339                         {
 340 #ifndef __APPLE__
 341                                 if (vid_dga.integer == 1)
 342                                 {
 343                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
 344                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
 345                                 }
 346                                 else
 347 #endif
 348                                 {
 349
 350                                         if (!event.xmotion.send_event)
 351                                         {
 352                                                 mouse_x += event.xmotion.x - p_mouse_x;
 353                                                 mouse_y += event.xmotion.y - p_mouse_y;
 354                                                 if (abs(scr_width/2 - event.xmotion.x) > scr_width / 4 || abs(scr_height/2 - event.xmotion.y) > scr_height / 4)
 355                                                         dowarp = true;
 356                                         }
 357                                         p_mouse_x = event.xmotion.x;
 358                                         p_mouse_y = event.xmotion.y;
 359                                 }
 360                         }
 361                         //else
 362                         //      ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 363                         break;
 364
 365                 case ButtonPress:
 366                         // mouse button pressed
 367                         switch(event.xbutton.button)
 368                         {
 369                         case 1:
 370                                 Key_Event(K_MOUSE1, 0, true);
 371                                 break;
 372                         case 2:
 373                                 Key_Event(K_MOUSE3, 0, true);
 374                                 break;
 375                         case 3:
 376                                 Key_Event(K_MOUSE2, 0, true);
 377                                 break;
 378                         case 4:
 379                                 Key_Event(K_MWHEELUP, 0, true);
 380                                 break;
 381                         case 5:
 382                                 Key_Event(K_MWHEELDOWN, 0, true);
 383                                 break;
 384                         case 6:
 385                                 Key_Event(K_MOUSE4, 0, true);
 386                                 break;
 387                         case 7:
 388                                 Key_Event(K_MOUSE5, 0, true);
 389                                 break;
 390                         case 8:
 391                                 Key_Event(K_MOUSE6, 0, true);
 392                                 break;
 393                         case 9:
 394                                 Key_Event(K_MOUSE7, 0, true);
 395                                 break;
 396                         case 10:
 397                                 Key_Event(K_MOUSE8, 0, true);
 398                                 break;
 399                         case 11:
 400                                 Key_Event(K_MOUSE9, 0, true);
 401                                 break;
 402                         case 12:
 403                                 Key_Event(K_MOUSE10, 0, true);
 404                                 break;
 405                         default:
 406                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-12 expected\n", event.xbutton.button);
 407                                 break;
 408                         }
 409                         break;
 410
 411                 case ButtonRelease:
 412                         // mouse button released
 413                         switch(event.xbutton.button)
 414                         {
 415                         case 1:
 416                                 Key_Event(K_MOUSE1, 0, false);
 417                                 break;
 418                         case 2:
 419                                 Key_Event(K_MOUSE3, 0, false);
 420                                 break;
 421                         case 3:
 422                                 Key_Event(K_MOUSE2, 0, false);
 423                                 break;
 424                         case 4:
 425                                 Key_Event(K_MWHEELUP, 0, false);
 426                                 break;
 427                         case 5:
 428                                 Key_Event(K_MWHEELDOWN, 0, false);
 429                                 break;
 430                         case 6:
 431                                 Key_Event(K_MOUSE4, 0, false);
 432                                 break;
 433                         case 7:
 434                                 Key_Event(K_MOUSE5, 0, false);
 435                                 break;
 436                         case 8:
 437                                 Key_Event(K_MOUSE6, 0, false);
 438                                 break;
 439                         case 9:
 440                                 Key_Event(K_MOUSE7, 0, false);
 441                                 break;
 442                         case 10:
 443                                 Key_Event(K_MOUSE8, 0, false);
 444                                 break;
 445                         case 11:
 446                                 Key_Event(K_MOUSE9, 0, false);
 447                                 break;
 448                         case 12:
 449                                 Key_Event(K_MOUSE10, 0, false);
 450                                 break;
 451                         default:
 452                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-12 expected\n", event.xbutton.button);
 453                                 break;
 454                         }
 455                         break;
 456
 457                 case CreateNotify:
 458                         // window created
 459                         win_x = event.xcreatewindow.x;
 460                         win_y = event.xcreatewindow.y;
 461                         break;
 462
 463                 case ConfigureNotify:
 464                         // window changed size/location
 465                         win_x = event.xconfigure.x;
 466                         win_y = event.xconfigure.y;
 467                         break;
 468                 case DestroyNotify:
 469                         // window has been destroyed
 470                         Sys_Quit();
 471                         break;
 472                 case ClientMessage:
 473                         // window manager messages
 474                         if ((event.xclient.format == 32) && ((unsigned int)event.xclient.data.l[0] == wm_delete_window_atom))
 475                                 Sys_Quit();
 476                         break;
 477                 case MapNotify:
 478                         // window restored
 479                         vid_hidden = false;
 480                         vid_activewindow = false;
 481                         VID_RestoreSystemGamma();
 482                         break;
 483                 case UnmapNotify:
 484                         // window iconified/rolledup/whatever
 485                         vid_hidden = true;
 486                         vid_activewindow = false;
 487                         VID_RestoreSystemGamma();
 488                         break;
 489                 case FocusIn:
 490                         // window is now the input focus
 491                         vid_activewindow = true;
 492                         break;
 493                 case FocusOut:
 494                         // window is no longer the input focus
 495                         vid_activewindow = false;
 496                         VID_RestoreSystemGamma();
 497                         break;
 498                 case EnterNotify:
 499                         // mouse entered window
 500                         break;
 501                 case LeaveNotify:
 502                         // mouse left window
 503                         break;
 504                 }
 505         }
 506
 507         if (dowarp)
 508         {
 509                 /* move the mouse to the window center again */
 510                 p_mouse_x = scr_width / 2;
 511                 p_mouse_y = scr_height / 2;
 512                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 513         }
 514
 515 }
 516
 517 static void IN_DeactivateMouse( void )
 518 {
 519         if (!mouse_avail || !vidx11_display || !win)
 520                 return;
 521
 522         if (mouse_active)
 523         {
 524                 uninstall_grabs();
 525                 mouse_active = false;
 526         }
 527 }
 528
 529 static void IN_ActivateMouse( void )
 530 {
 531         if (!mouse_avail || !vidx11_display || !win)
 532                 return;
 533
 534         if (!mouse_active)
 535         {
 536                 mouse_x = mouse_y = 0; // don't spazz
 537                 install_grabs();
 538                 mouse_active = true;
 539         }
 540 }
 541
 542 void VID_Shutdown(void)
 543 {
 544         if (!ctx || !vidx11_display)
 545                 return;
 546
 547         vid_hidden = true;
 548         usingmouse = false;
 549         if (vidx11_display)
 550         {
 551                 VID_RestoreSystemGamma();
 552                 uninstall_grabs();
 553
 554                 // FIXME: glXDestroyContext here?
 555                 if (vidmode_active)
 556                         XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[0]);
 557                 if (win)
 558                         XDestroyWindow(vidx11_display, win);
 559                 XCloseDisplay(vidx11_display);
 560         }
 561         vidmode_active = false;
 562         vidx11_display = NULL;
 563         win = 0;
 564         ctx = NULL;
 565
 566         GL_CloseLibrary();
 567         Key_ClearStates ();
 568 }
 569
 570 void signal_handler(int sig)
 571 {
 572         printf("Received signal %d, exiting...\n", sig);
 573         VID_RestoreSystemGamma();
 574         Sys_Quit();
 575         exit(0);
 576 }
 577
 578 void InitSig(void)
 579 {
 580         signal(SIGHUP, signal_handler);
 581         signal(SIGINT, signal_handler);
 582         signal(SIGQUIT, signal_handler);
 583         signal(SIGILL, signal_handler);
 584         signal(SIGTRAP, signal_handler);
 585         signal(SIGIOT, signal_handler);
 586         signal(SIGBUS, signal_handler);
 587         signal(SIGFPE, signal_handler);
 588         signal(SIGSEGV, signal_handler);
 589         signal(SIGTERM, signal_handler);
 590 }
 591
 592 /*
 593 =================
 594 VID_GetWindowSize
 595 =================
 596 */
 597 void VID_GetWindowSize (int *x, int *y, int *width, int *height)
 598 {
 599         *x = *y = 0;
 600         *width = scr_width;
 601         *height = scr_height;
 602 }
 603
 604 void VID_Finish (void)
 605 {
 606         int usemouse;
 607         if (r_render.integer)
 608         {
 609                 qglFinish();
 610                 qglXSwapBuffers(vidx11_display, win);
 611         }
 612
 613 // handle the mouse state when windowed if that's changed
 614         usemouse = false;
 615         if (vid_mouse.integer && !key_consoleactive)
 616                 usemouse = true;
 617         if (vidmode_active)
 618                 usemouse = true;
 619         if (usemouse)
 620         {
 621                 if (!usingmouse)
 622                 {
 623                         usingmouse = true;
 624                         IN_ActivateMouse ();
 625                 }
 626         }
 627         else
 628         {
 629                 if (usingmouse)
 630                 {
 631                         usingmouse = false;
 632                         IN_DeactivateMouse ();
 633                 }
 634         }
 635 }
 636
 637 int VID_SetGamma(unsigned short *ramps)
 638 {
 639         return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 640 }
 641
 642 int VID_GetGamma(unsigned short *ramps)
 643 {
 644         return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 645 }
 646
 647 void VID_Init(void)
 648 {
 649 #ifndef __APPLE__
 650         Cvar_RegisterVariable (&vid_dga);
 651         Cvar_RegisterVariable (&vid_dga_mouseaccel);
 652 #endif
 653         InitSig(); // trap evil signals
 654         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
 655                 mouse_avail = false;
 656 }
 657
 658 void VID_BuildGLXAttrib(int *attrib, int stencil)
 659 {
 660         *attrib++ = GLX_RGBA;
 661         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 662         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 663         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 664         *attrib++ = GLX_DOUBLEBUFFER;
 665         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 666         // if stencil is enabled, ask for alpha too
 667         if (stencil)
 668         {
 669                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 670                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
 671         }
 672         *attrib++ = None;
 673 }
 674
 675 int VID_InitMode(int fullscreen, int width, int height, int bpp)
 676 {
 677         int i;
 678         int attrib[32];
 679         XSetWindowAttributes attr;
 680         unsigned long mask;
 681         Window root;
 682         XVisualInfo *visinfo;
 683         int MajorVersion, MinorVersion;
 684         const char *drivername;
 685
 686 #if defined(__APPLE__) && defined(__MACH__)
 687         drivername = "/usr/X11R6/lib/libGL.1.dylib";
 688 #else
 689         drivername = "libGL.so.1"
 690 #endif
 691         i = COM_CheckParm("-gl_driver");
 692         if (i && i < com_argc - 1)
 693                 drivername = com_argv[i + 1];
 694         if (!GL_OpenLibrary(drivername))
 695         {
 696                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 697                 return false;
 698         }
 699
 700         if (!(vidx11_display = XOpenDisplay(NULL)))
 701         {
 702                 Con_Printf("Couldn't open the X display\n");
 703                 return false;
 704         }
 705
 706         vidx11_screen = DefaultScreen(vidx11_display);
 707         root = RootWindow(vidx11_display, vidx11_screen);
 708
 709         // Get video mode list
 710         MajorVersion = MinorVersion = 0;
 711         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 712                 vidmode_ext = false;
 713         else
 714         {
 715                 Con_DPrintf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 716                 vidmode_ext = true;
 717         }
 718
 719         if ((qglXChooseVisual = GL_GetProcAddress("glXChooseVisual")) == NULL
 720          || (qglXCreateContext = GL_GetProcAddress("glXCreateContext")) == NULL
 721          || (qglXMakeCurrent = GL_GetProcAddress("glXMakeCurrent")) == NULL
 722          || (qglXSwapBuffers = GL_GetProcAddress("glXSwapBuffers")) == NULL
 723          || (qglXQueryExtensionsString = GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 724         {
 725                 Con_Printf("glX functions not found in %s\n", gl_driver);
 726                 return false;
 727         }
 728
 729         VID_BuildGLXAttrib(attrib, bpp == 32);
 730         visinfo = qglXChooseVisual(vidx11_display, vidx11_screen, attrib);
 731         if (!visinfo)
 732         {
 733                 Con_Printf("Couldn't get an RGB, Double-buffered, Depth visual\n");
 734                 return false;
 735         }
 736
 737         if (vidmode_ext)
 738         {
 739                 int best_fit, best_dist, dist, x, y;
 740
 741                 // Are we going fullscreen?  If so, let's change video mode
 742                 if (fullscreen)
 743                 {
 744                         XF86VidModeGetAllModeLines(vidx11_display, vidx11_screen, &num_vidmodes, &vidmodes);
 745                         best_dist = 9999999;
 746                         best_fit = -1;
 747
 748                         for (i = 0; i < num_vidmodes; i++)
 749                         {
 750                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
 751                                         continue;
 752
 753                                 x = width - vidmodes[i]->hdisplay;
 754                                 y = height - vidmodes[i]->vdisplay;
 755                                 dist = (x * x) + (y * y);
 756                                 if (dist < best_dist)
 757                                 {
 758                                         best_dist = dist;
 759                                         best_fit = i;
 760                                 }
 761                         }
 762
 763                         if (best_fit != -1)
 764                         {
 765                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
 766                                 // to width/height =, so the window will take the full area of
 767                                 // the mode chosen
 768                                 width = vidmodes[best_fit]->hdisplay;
 769                                 height = vidmodes[best_fit]->vdisplay;
 770
 771                                 // change to the mode
 772                                 XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[best_fit]);
 773                                 vidmode_active = true;
 774
 775                                 // Move the viewport to top left
 776                                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 777                         }
 778                         else
 779                                 fullscreen = 0;
 780                 }
 781         }
 782
 783         // LordHavoc: save the visual for use in gamma ramp settings later
 784         vidx11_visual = visinfo->visual;
 785
 786         /* window attributes */
 787         attr.background_pixel = 0;
 788         attr.border_pixel = 0;
 789         // LordHavoc: save the colormap for later, too
 790         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 791         attr.event_mask = X_MASK;
 792         if (vidmode_active)
 793         {
 794                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 795                 attr.override_redirect = True;
 796                 attr.backing_store = NotUseful;
 797                 attr.save_under = False;
 798         }
 799         else
 800                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 801
 802         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 803         XStoreName(vidx11_display, win, gamename);
 804         XMapWindow(vidx11_display, win);
 805
 806         // LordHavoc: making the close button on a window do the right thing
 807         // seems to involve this mess, sigh...
 808         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 809         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 810
 811         if (vidmode_active)
 812         {
 813                 XMoveWindow(vidx11_display, win, 0, 0);
 814                 XRaiseWindow(vidx11_display, win);
 815                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 816                 XFlush(vidx11_display);
 817                 // Move the viewport to top left
 818                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 819         }
 820
 821         //XSync(vidx11_display, False);
 822
 823         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 824         if (!ctx)
 825                 Sys_Error ("glXCreateContext failed\n");
 826
 827         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 828                 Sys_Error ("glXMakeCurrent failed\n");
 829
 830         XSync(vidx11_display, False);
 831
 832         scr_width = width;
 833         scr_height = height;
 834
 835         if ((qglGetString = GL_GetProcAddress("glGetString")) == NULL)
 836                 Sys_Error("glGetString not found in %s", gl_driver);
 837
 838         gl_renderer = qglGetString(GL_RENDERER);
 839         gl_vendor = qglGetString(GL_VENDOR);
 840         gl_version = qglGetString(GL_VERSION);
 841         gl_extensions = qglGetString(GL_EXTENSIONS);
 842         gl_platform = "GLX";
 843         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, vidx11_screen);
 844
 845         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 846         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_video_sync", videosyncfuncs, "-novideosync", false);
 847
 848         usingmouse = false;
 849         vid_hidden = false;
 850         vid_activewindow = true;
 851         GL_Init();
 852         return true;
 853 }
 854
 855 void Sys_SendKeyEvents(void)
 856 {
 857         HandleEvents();
 858 }
 859
 860 /*
 861 ===========
 862 IN_Commands
 863 ===========
 864 */
 865 void IN_Commands (void)
 866 {
 867 }
 868
 869 void IN_Move (usercmd_t *cmd)
 870 {
 871         if (mouse_avail)
 872                 IN_Mouse(cmd, mouse_x, mouse_y);
 873         mouse_x = 0;
 874         mouse_y = 0;
 875 }
 876
 877 static void *prjobj = NULL;
 878
 879 int GL_OpenLibrary(const char *name)
 880 {
 881         Con_Printf("Loading OpenGL driver %s\n", name);
 882         GL_CloseLibrary();
 883         if (!(prjobj = dlopen(name, RTLD_LAZY)))
 884         {
 885                 Con_Printf("Unable to open symbol list for %s\n", name);
 886                 return false;
 887         }
 888         strcpy(gl_driver, name);
 889         return true;
 890 }
 891
 892 void GL_CloseLibrary(void)
 893 {
 894         if (prjobj)
 895                 dlclose(prjobj);
 896         prjobj = NULL;
 897         gl_driver[0] = 0;
 898         qglXGetProcAddressARB = NULL;
 899         gl_extensions = "";
 900         gl_platform = "";
 901         gl_platformextensions = "";
 902 }
 903
 904 void *GL_GetProcAddress(const char *name)
 905 {
 906         void *p = NULL;
 907         if (qglXGetProcAddressARB != NULL)
 908                 p = (void *) qglXGetProcAddressARB(name);
 909         if (p == NULL)
 910                 p = (void *) dlsym(prjobj, name);
 911         return p;
 912 }
 913