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 // Tell startup code that we have a client
  46 int cl_available = true;
  47
  48 //GLX prototypes
  49 XVisualInfo *(GLAPIENTRY *qglXChooseVisual)(Display *dpy, int screen, int *attribList);
  50 GLXContext (GLAPIENTRY *qglXCreateContext)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct);
  51 void (GLAPIENTRY *qglXDestroyContext)(Display *dpy, GLXContext ctx);
  52 Bool (GLAPIENTRY *qglXMakeCurrent)(Display *dpy, GLXDrawable drawable, GLXContext ctx);
  53 void (GLAPIENTRY *qglXSwapBuffers)(Display *dpy, GLXDrawable drawable);
  54 const char *(GLAPIENTRY *qglXQueryExtensionsString)(Display *dpy, int screen);
  55
  56 //GLX_ARB_get_proc_address
  57 void *(GLAPIENTRY *qglXGetProcAddressARB)(const GLubyte *procName);
  58
  59 static dllfunction_t getprocaddressfuncs[] =
  60 {
  61         {"glXGetProcAddressARB", (void **) &qglXGetProcAddressARB},
  62         {NULL, NULL}
  63 };
  64
  65 //GLX_SGI_swap_control
  66 GLint (GLAPIENTRY *qglXSwapIntervalSGI)(GLint interval);
  67
  68 static dllfunction_t swapcontrolfuncs[] =
  69 {
  70         {"glXSwapIntervalSGI", (void **) &qglXSwapIntervalSGI},
  71         {NULL, NULL}
  72 };
  73
  74 static Display *vidx11_display = NULL;
  75 static int vidx11_screen;
  76 static Window win;
  77 static GLXContext ctx = NULL;
  78
  79 Atom wm_delete_window_atom;
  80
  81 #define KEY_MASK (KeyPressMask | KeyReleaseMask)
  82 #define MOUSE_MASK (ButtonPressMask | ButtonReleaseMask | \
  83                     PointerMotionMask | ButtonMotionMask)
  84 #define X_MASK (KEY_MASK | MOUSE_MASK | VisibilityChangeMask | \
  85                 StructureNotifyMask | FocusChangeMask | EnterWindowMask | \
  86                 LeaveWindowMask)
  87
  88
  89 static qboolean mouse_avail = true;
  90 static qboolean mouse_active = false;
  91 static qboolean vid_usingmouse = false;
  92 static qboolean vid_usemouse = false;
  93 static qboolean vid_usingvsync = false;
  94 static qboolean vid_usevsync = false;
  95 static qboolean ignoremousemove = false;
  96 static float    mouse_x, mouse_y;
  97 static int p_mouse_x, p_mouse_y;
  98
  99 #ifndef __APPLE__
 100 cvar_t vid_dga = {CVAR_SAVE, "vid_dga", "1"};
 101 cvar_t vid_dga_mouseaccel = {0, "vid_dga_mouseaccel", "1"};
 102 #endif
 103
 104 qboolean vidmode_ext = false;
 105
 106 static int win_x, win_y;
 107
 108 static int scr_width, scr_height;
 109
 110 static XF86VidModeModeInfo **vidmodes;
 111 static int num_vidmodes;
 112 static qboolean vidmode_active = false;
 113
 114 static Visual *vidx11_visual;
 115 static Colormap vidx11_colormap;
 116
 117 /*-----------------------------------------------------------------------*/
 118
 119 static int XLateKey(XKeyEvent *ev, char *ascii)
 120 {
 121         int key = 0;
 122         char buf[64];
 123         KeySym keysym, shifted;
 124
 125         keysym = XLookupKeysym (ev, 0);
 126         XLookupString(ev, buf, sizeof buf, &shifted, 0);
 127         *ascii = buf[0];
 128
 129         switch(keysym)
 130         {
 131                 case XK_KP_Page_Up:      key = K_KP_PGUP; break;
 132                 case XK_Page_Up:         key = K_PGUP; break;
 133
 134                 case XK_KP_Page_Down: key = K_KP_PGDN; break;
 135                 case XK_Page_Down:       key = K_PGDN; break;
 136
 137                 case XK_KP_Home: key = K_KP_HOME; break;
 138                 case XK_Home:    key = K_HOME; break;
 139
 140                 case XK_KP_End:  key = K_KP_END; break;
 141                 case XK_End:     key = K_END; break;
 142
 143                 case XK_KP_Left: key = K_KP_LEFTARROW; break;
 144                 case XK_Left:    key = K_LEFTARROW; break;
 145
 146                 case XK_KP_Right: key = K_KP_RIGHTARROW; break;
 147                 case XK_Right:  key = K_RIGHTARROW;             break;
 148
 149                 case XK_KP_Down: key = K_KP_DOWNARROW; break;
 150                 case XK_Down:    key = K_DOWNARROW; break;
 151
 152                 case XK_KP_Up:   key = K_KP_UPARROW; break;
 153                 case XK_Up:              key = K_UPARROW;        break;
 154
 155                 case XK_Escape: key = K_ESCAPE;         break;
 156
 157                 case XK_KP_Enter: key = K_KP_ENTER;     break;
 158                 case XK_Return: key = K_ENTER;           break;
 159
 160                 case XK_Tab:            key = K_TAB;                     break;
 161
 162                 case XK_F1:              key = K_F1;                            break;
 163
 164                 case XK_F2:              key = K_F2;                            break;
 165
 166                 case XK_F3:              key = K_F3;                            break;
 167
 168                 case XK_F4:              key = K_F4;                            break;
 169
 170                 case XK_F5:              key = K_F5;                            break;
 171
 172                 case XK_F6:              key = K_F6;                            break;
 173
 174                 case XK_F7:              key = K_F7;                            break;
 175
 176                 case XK_F8:              key = K_F8;                            break;
 177
 178                 case XK_F9:              key = K_F9;                            break;
 179
 180                 case XK_F10:            key = K_F10;                     break;
 181
 182                 case XK_F11:            key = K_F11;                     break;
 183
 184                 case XK_F12:            key = K_F12;                     break;
 185
 186                 case XK_BackSpace: key = K_BACKSPACE; break;
 187
 188                 case XK_KP_Delete: key = K_KP_DEL; break;
 189                 case XK_Delete: key = K_DEL; break;
 190
 191                 case XK_Pause:  key = K_PAUSE;           break;
 192
 193                 case XK_Shift_L:
 194                 case XK_Shift_R:        key = K_SHIFT;          break;
 195
 196                 case XK_Execute:
 197                 case XK_Control_L:
 198                 case XK_Control_R:      key = K_CTRL;            break;
 199
 200                 case XK_Alt_L:
 201                 case XK_Meta_L:
 202                 case XK_Alt_R:
 203                 case XK_Meta_R: key = K_ALT;                    break;
 204
 205                 case XK_KP_Begin: key = K_KP_5; break;
 206
 207                 case XK_Insert:key = K_INS; break;
 208                 case XK_KP_Insert: key = K_KP_INS; break;
 209
 210                 case XK_KP_Multiply: key = '*'; break;
 211                 case XK_KP_Add:  key = K_KP_PLUS; break;
 212                 case XK_KP_Subtract: key = K_KP_MINUS; break;
 213                 case XK_KP_Divide: key = K_KP_SLASH; break;
 214
 215                 default:
 216                         if (keysym < 32 && keysym > 126)
 217                                 break;
 218
 219                         if (keysym >= 'A' && keysym <= 'Z')
 220                                 key = keysym - 'A' + 'a';
 221                         else
 222                                 key = keysym;
 223
 224                         break;
 225         }
 226
 227         return key;
 228 }
 229
 230 static Cursor CreateNullCursor(Display *display, Window root)
 231 {
 232         Pixmap cursormask;
 233         XGCValues xgc;
 234         GC gc;
 235         XColor dummycolour;
 236         Cursor cursor;
 237
 238         cursormask = XCreatePixmap(display, root, 1, 1, 1);
 239         xgc.function = GXclear;
 240         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
 241         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
 242         dummycolour.pixel = 0;
 243         dummycolour.red = 0;
 244         dummycolour.flags = 04;
 245         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
 246         XFreePixmap(display,cursormask);
 247         XFreeGC(display,gc);
 248         return cursor;
 249 }
 250
 251 static void install_grabs(void)
 252 {
 253         XWindowAttributes attribs_1;
 254         XSetWindowAttributes attribs_2;
 255
 256         XGetWindowAttributes(vidx11_display, win, &attribs_1);
 257         attribs_2.event_mask = attribs_1.your_event_mask | KEY_MASK | MOUSE_MASK;
 258         XChangeWindowAttributes(vidx11_display, win, CWEventMask, &attribs_2);
 259
 260 // inviso cursor
 261         XDefineCursor(vidx11_display, win, CreateNullCursor(vidx11_display, win));
 262
 263         XGrabPointer(vidx11_display, win,  True, 0, GrabModeAsync, GrabModeAsync, win, None, CurrentTime);
 264
 265 #ifndef __APPLE__
 266         if (vid_dga.integer)
 267         {
 268                 int MajorVersion, MinorVersion;
 269
 270                 if (!XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 271                 {
 272                         // unable to query, probalby not supported
 273                         Con_Print( "Failed to detect XF86DGA Mouse\n" );
 274                         vid_dga.integer = 0;
 275                 }
 276                 else
 277                 {
 278                         vid_dga.integer = 1;
 279                         XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
 280                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 281                 }
 282         }
 283         else
 284 #endif
 285                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, scr_width / 2, scr_height / 2);
 286
 287         XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 288
 289         mouse_active = true;
 290         mouse_x = mouse_y = 0;
 291         ignoremousemove = true;
 292 }
 293
 294 static void uninstall_grabs(void)
 295 {
 296         if (!vidx11_display || !win)
 297                 return;
 298
 299 #ifndef __APPLE__
 300         if (vid_dga.integer == 1)
 301                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
 302 #endif
 303
 304         XUngrabPointer(vidx11_display, CurrentTime);
 305         XUngrabKeyboard(vidx11_display, CurrentTime);
 306
 307 // inviso cursor
 308         XUndefineCursor(vidx11_display, win);
 309
 310         mouse_active = false;
 311         ignoremousemove = true;
 312 }
 313
 314 static void HandleEvents(void)
 315 {
 316         XEvent event;
 317         int key;
 318         char ascii;
 319         qboolean dowarp = false;
 320
 321         if (!vidx11_display)
 322                 return;
 323
 324         while (XPending(vidx11_display))
 325         {
 326                 XNextEvent(vidx11_display, &event);
 327
 328                 switch (event.type)
 329                 {
 330                 case KeyPress:
 331                         // key pressed
 332                         key = XLateKey (&event.xkey, &ascii);
 333                         Key_Event(key, ascii, true);
 334                         break;
 335
 336                 case KeyRelease:
 337                         // key released
 338                         key = XLateKey (&event.xkey, &ascii);
 339                         Key_Event(key, ascii, false);
 340                         break;
 341
 342                 case MotionNotify:
 343                         // mouse moved
 344                         if (vid_usingmouse)
 345                         {
 346 #ifndef __APPLE__
 347                                 if (vid_dga.integer == 1)
 348                                 {
 349                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
 350                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
 351                                 }
 352                                 else
 353 #endif
 354                                 {
 355
 356                                         if (!event.xmotion.send_event)
 357                                         {
 358                                                 mouse_x += event.xmotion.x - p_mouse_x;
 359                                                 mouse_y += event.xmotion.y - p_mouse_y;
 360                                                 if (abs(scr_width/2 - event.xmotion.x) > scr_width / 4 || abs(scr_height/2 - event.xmotion.y) > scr_height / 4)
 361                                                         dowarp = true;
 362                                         }
 363                                         p_mouse_x = event.xmotion.x;
 364                                         p_mouse_y = event.xmotion.y;
 365                                 }
 366                         }
 367                         //else
 368                         //      ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 369                         break;
 370
 371                 case ButtonPress:
 372                         // mouse button pressed
 373                         switch(event.xbutton.button)
 374                         {
 375                         case 1:
 376                                 Key_Event(K_MOUSE1, 0, true);
 377                                 break;
 378                         case 2:
 379                                 Key_Event(K_MOUSE3, 0, true);
 380                                 break;
 381                         case 3:
 382                                 Key_Event(K_MOUSE2, 0, true);
 383                                 break;
 384                         case 4:
 385                                 Key_Event(K_MWHEELUP, 0, true);
 386                                 break;
 387                         case 5:
 388                                 Key_Event(K_MWHEELDOWN, 0, true);
 389                                 break;
 390                         case 6:
 391                                 Key_Event(K_MOUSE4, 0, true);
 392                                 break;
 393                         case 7:
 394                                 Key_Event(K_MOUSE5, 0, true);
 395                                 break;
 396                         case 8:
 397                                 Key_Event(K_MOUSE6, 0, true);
 398                                 break;
 399                         case 9:
 400                                 Key_Event(K_MOUSE7, 0, true);
 401                                 break;
 402                         case 10:
 403                                 Key_Event(K_MOUSE8, 0, true);
 404                                 break;
 405                         case 11:
 406                                 Key_Event(K_MOUSE9, 0, true);
 407                                 break;
 408                         case 12:
 409                                 Key_Event(K_MOUSE10, 0, true);
 410                                 break;
 411                         default:
 412                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-12 expected\n", event.xbutton.button);
 413                                 break;
 414                         }
 415                         break;
 416
 417                 case ButtonRelease:
 418                         // mouse button released
 419                         switch(event.xbutton.button)
 420                         {
 421                         case 1:
 422                                 Key_Event(K_MOUSE1, 0, false);
 423                                 break;
 424                         case 2:
 425                                 Key_Event(K_MOUSE3, 0, false);
 426                                 break;
 427                         case 3:
 428                                 Key_Event(K_MOUSE2, 0, false);
 429                                 break;
 430                         case 4:
 431                                 Key_Event(K_MWHEELUP, 0, false);
 432                                 break;
 433                         case 5:
 434                                 Key_Event(K_MWHEELDOWN, 0, false);
 435                                 break;
 436                         case 6:
 437                                 Key_Event(K_MOUSE4, 0, false);
 438                                 break;
 439                         case 7:
 440                                 Key_Event(K_MOUSE5, 0, false);
 441                                 break;
 442                         case 8:
 443                                 Key_Event(K_MOUSE6, 0, false);
 444                                 break;
 445                         case 9:
 446                                 Key_Event(K_MOUSE7, 0, false);
 447                                 break;
 448                         case 10:
 449                                 Key_Event(K_MOUSE8, 0, false);
 450                                 break;
 451                         case 11:
 452                                 Key_Event(K_MOUSE9, 0, false);
 453                                 break;
 454                         case 12:
 455                                 Key_Event(K_MOUSE10, 0, false);
 456                                 break;
 457                         default:
 458                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-12 expected\n", event.xbutton.button);
 459                                 break;
 460                         }
 461                         break;
 462
 463                 case CreateNotify:
 464                         // window created
 465                         win_x = event.xcreatewindow.x;
 466                         win_y = event.xcreatewindow.y;
 467                         break;
 468
 469                 case ConfigureNotify:
 470                         // window changed size/location
 471                         win_x = event.xconfigure.x;
 472                         win_y = event.xconfigure.y;
 473                         break;
 474                 case DestroyNotify:
 475                         // window has been destroyed
 476                         Sys_Quit();
 477                         break;
 478                 case ClientMessage:
 479                         // window manager messages
 480                         if ((event.xclient.format == 32) && ((unsigned int)event.xclient.data.l[0] == wm_delete_window_atom))
 481                                 Sys_Quit();
 482                         break;
 483                 case MapNotify:
 484                         // window restored
 485                         vid_hidden = false;
 486                         vid_activewindow = false;
 487                         VID_RestoreSystemGamma();
 488                         break;
 489                 case UnmapNotify:
 490                         // window iconified/rolledup/whatever
 491                         vid_hidden = true;
 492                         vid_activewindow = false;
 493                         VID_RestoreSystemGamma();
 494                         break;
 495                 case FocusIn:
 496                         // window is now the input focus
 497                         vid_activewindow = true;
 498                         break;
 499                 case FocusOut:
 500                         // window is no longer the input focus
 501                         vid_activewindow = false;
 502                         VID_RestoreSystemGamma();
 503                         break;
 504                 case EnterNotify:
 505                         // mouse entered window
 506                         break;
 507                 case LeaveNotify:
 508                         // mouse left window
 509                         break;
 510                 }
 511         }
 512
 513         if (dowarp)
 514         {
 515                 /* move the mouse to the window center again */
 516                 p_mouse_x = scr_width / 2;
 517                 p_mouse_y = scr_height / 2;
 518                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 519         }
 520
 521         // if told to ignore one mouse move, do so
 522         if (ignoremousemove)
 523         {
 524                 ignoremousemove = false;
 525                 mouse_x = 0;
 526                 mouse_y = 0;
 527         }
 528 }
 529
 530 static void IN_DeactivateMouse( void )
 531 {
 532         if (!mouse_avail || !vidx11_display || !win)
 533                 return;
 534
 535         if (mouse_active)
 536         {
 537                 uninstall_grabs();
 538                 mouse_active = false;
 539         }
 540 }
 541
 542 static void IN_ActivateMouse( void )
 543 {
 544         if (!mouse_avail || !vidx11_display || !win)
 545                 return;
 546
 547         if (!mouse_active)
 548         {
 549                 install_grabs();
 550                 mouse_active = true;
 551         }
 552 }
 553
 554 void VID_Shutdown(void)
 555 {
 556         if (!ctx || !vidx11_display)
 557                 return;
 558
 559         vid_hidden = true;
 560         vid_usingmouse = false;
 561         if (vidx11_display)
 562         {
 563                 VID_RestoreSystemGamma();
 564                 uninstall_grabs();
 565
 566                 // FIXME: glXDestroyContext here?
 567                 if (vidmode_active)
 568                         XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[0]);
 569                 if (win)
 570                         XDestroyWindow(vidx11_display, win);
 571                 XCloseDisplay(vidx11_display);
 572         }
 573         vidmode_active = false;
 574         vidx11_display = NULL;
 575         win = 0;
 576         ctx = NULL;
 577
 578         GL_CloseLibrary();
 579         Key_ClearStates ();
 580 }
 581
 582 void signal_handler(int sig)
 583 {
 584         printf("Received signal %d, exiting...\n", sig);
 585         VID_RestoreSystemGamma();
 586         Sys_Quit();
 587         exit(0);
 588 }
 589
 590 void InitSig(void)
 591 {
 592         signal(SIGHUP, signal_handler);
 593         signal(SIGINT, signal_handler);
 594         signal(SIGQUIT, signal_handler);
 595         signal(SIGILL, signal_handler);
 596         signal(SIGTRAP, signal_handler);
 597         signal(SIGIOT, signal_handler);
 598         signal(SIGBUS, signal_handler);
 599         signal(SIGFPE, signal_handler);
 600         signal(SIGSEGV, signal_handler);
 601         signal(SIGTERM, signal_handler);
 602 }
 603
 604 /*
 605 =================
 606 VID_GetWindowSize
 607 =================
 608 */
 609 void VID_GetWindowSize (int *x, int *y, int *width, int *height)
 610 {
 611         *x = *y = 0;
 612         *width = scr_width;
 613         *height = scr_height;
 614 }
 615
 616 void VID_Finish (void)
 617 {
 618         vid_usevsync = vid_vsync.integer && !cls.timedemo && gl_videosyncavailable;
 619         if (vid_usingvsync != vid_usevsync && gl_videosyncavailable)
 620         {
 621                 vid_usingvsync = vid_usevsync;
 622                 qglXSwapIntervalSGI (vid_usevsync);
 623         }
 624
 625 // handle the mouse state when windowed if that's changed
 626         vid_usemouse = false;
 627         if (vid_mouse.integer && !key_consoleactive)
 628                 vid_usemouse = true;
 629         if (vidmode_active)
 630                 vid_usemouse = true;
 631         if (vid_usemouse)
 632         {
 633                 if (!vid_usingmouse)
 634                 {
 635                         vid_usingmouse = true;
 636                         IN_ActivateMouse ();
 637                 }
 638         }
 639         else
 640         {
 641                 if (vid_usingmouse)
 642                 {
 643                         vid_usingmouse = false;
 644                         IN_DeactivateMouse ();
 645                 }
 646         }
 647
 648         if (r_render.integer)
 649         {
 650                 if (r_speeds.integer || gl_finish.integer)
 651                         qglFinish();
 652                 qglXSwapBuffers(vidx11_display, win);
 653         }
 654 }
 655
 656 int VID_SetGamma(unsigned short *ramps)
 657 {
 658         return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 659 }
 660
 661 int VID_GetGamma(unsigned short *ramps)
 662 {
 663         return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 664 }
 665
 666 void VID_Init(void)
 667 {
 668 #ifndef __APPLE__
 669         Cvar_RegisterVariable (&vid_dga);
 670         Cvar_RegisterVariable (&vid_dga_mouseaccel);
 671 #endif
 672         InitSig(); // trap evil signals
 673 // COMMANDLINEOPTION: Input: -nomouse disables mouse support (see also vid_mouse cvar)
 674         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
 675                 mouse_avail = false;
 676 }
 677
 678 void VID_BuildGLXAttrib(int *attrib, int stencil)
 679 {
 680         *attrib++ = GLX_RGBA;
 681         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 682         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 683         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 684         *attrib++ = GLX_DOUBLEBUFFER;
 685         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 686         // if stencil is enabled, ask for alpha too
 687         if (stencil)
 688         {
 689                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 690                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
 691         }
 692         *attrib++ = None;
 693 }
 694
 695 int VID_InitMode(int fullscreen, int width, int height, int bpp)
 696 {
 697         int i;
 698         int attrib[32];
 699         XSetWindowAttributes attr;
 700         unsigned long mask;
 701         Window root;
 702         XVisualInfo *visinfo;
 703         int MajorVersion, MinorVersion;
 704         const char *drivername;
 705
 706 #if defined(__APPLE__) && defined(__MACH__)
 707         drivername = "/usr/X11R6/lib/libGL.1.dylib";
 708 #else
 709         drivername = "libGL.so.1";
 710 #endif
 711 // COMMANDLINEOPTION: Linux GLX: -gl_driver <drivername> selects a GL driver library, default is libGL.so.1, useful only for using fxmesa or similar, if you don't know what this is for, you don't need it
 712 // COMMANDLINEOPTION: BSD GLX: -gl_driver <drivername> selects a GL driver library, default is libGL.so.1, useful only for using fxmesa or similar, if you don't know what this is for, you don't need it
 713 // LordHavoc: although this works on MacOSX, it's useless there (as there is only one system libGL)
 714         i = COM_CheckParm("-gl_driver");
 715         if (i && i < com_argc - 1)
 716                 drivername = com_argv[i + 1];
 717         if (!GL_OpenLibrary(drivername))
 718         {
 719                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 720                 return false;
 721         }
 722
 723         if (!(vidx11_display = XOpenDisplay(NULL)))
 724         {
 725                 Con_Print("Couldn't open the X display\n");
 726                 return false;
 727         }
 728
 729         vidx11_screen = DefaultScreen(vidx11_display);
 730         root = RootWindow(vidx11_display, vidx11_screen);
 731
 732         // Get video mode list
 733         MajorVersion = MinorVersion = 0;
 734         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 735                 vidmode_ext = false;
 736         else
 737         {
 738                 Con_DPrintf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 739                 vidmode_ext = true;
 740         }
 741
 742         if ((qglXChooseVisual = GL_GetProcAddress("glXChooseVisual")) == NULL
 743          || (qglXCreateContext = GL_GetProcAddress("glXCreateContext")) == NULL
 744          || (qglXMakeCurrent = GL_GetProcAddress("glXMakeCurrent")) == NULL
 745          || (qglXSwapBuffers = GL_GetProcAddress("glXSwapBuffers")) == NULL
 746          || (qglXQueryExtensionsString = GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 747         {
 748                 Con_Printf("glX functions not found in %s\n", gl_driver);
 749                 return false;
 750         }
 751
 752         VID_BuildGLXAttrib(attrib, bpp == 32);
 753         visinfo = qglXChooseVisual(vidx11_display, vidx11_screen, attrib);
 754         if (!visinfo)
 755         {
 756                 Con_Print("Couldn't get an RGB, Double-buffered, Depth visual\n");
 757                 return false;
 758         }
 759
 760         if (vidmode_ext)
 761         {
 762                 int best_fit, best_dist, dist, x, y;
 763
 764                 // Are we going fullscreen?  If so, let's change video mode
 765                 if (fullscreen)
 766                 {
 767                         XF86VidModeGetAllModeLines(vidx11_display, vidx11_screen, &num_vidmodes, &vidmodes);
 768                         best_dist = 9999999;
 769                         best_fit = -1;
 770
 771                         for (i = 0; i < num_vidmodes; i++)
 772                         {
 773                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
 774                                         continue;
 775
 776                                 x = width - vidmodes[i]->hdisplay;
 777                                 y = height - vidmodes[i]->vdisplay;
 778                                 dist = (x * x) + (y * y);
 779                                 if (dist < best_dist)
 780                                 {
 781                                         best_dist = dist;
 782                                         best_fit = i;
 783                                 }
 784                         }
 785
 786                         if (best_fit != -1)
 787                         {
 788                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
 789                                 // to width/height =, so the window will take the full area of
 790                                 // the mode chosen
 791                                 width = vidmodes[best_fit]->hdisplay;
 792                                 height = vidmodes[best_fit]->vdisplay;
 793
 794                                 // change to the mode
 795                                 XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[best_fit]);
 796                                 vidmode_active = true;
 797
 798                                 // Move the viewport to top left
 799                                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 800                         }
 801                         else
 802                                 fullscreen = 0;
 803                 }
 804         }
 805
 806         // LordHavoc: save the visual for use in gamma ramp settings later
 807         vidx11_visual = visinfo->visual;
 808
 809         /* window attributes */
 810         attr.background_pixel = 0;
 811         attr.border_pixel = 0;
 812         // LordHavoc: save the colormap for later, too
 813         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 814         attr.event_mask = X_MASK;
 815         if (vidmode_active)
 816         {
 817                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 818                 attr.override_redirect = True;
 819                 attr.backing_store = NotUseful;
 820                 attr.save_under = False;
 821         }
 822         else
 823                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 824
 825         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 826         XStoreName(vidx11_display, win, gamename);
 827         XMapWindow(vidx11_display, win);
 828
 829         // LordHavoc: making the close button on a window do the right thing
 830         // seems to involve this mess, sigh...
 831         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 832         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 833
 834         if (vidmode_active)
 835         {
 836                 XMoveWindow(vidx11_display, win, 0, 0);
 837                 XRaiseWindow(vidx11_display, win);
 838                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 839                 XFlush(vidx11_display);
 840                 // Move the viewport to top left
 841                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 842         }
 843
 844         //XSync(vidx11_display, False);
 845
 846         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 847         if (!ctx)
 848                 Sys_Error ("glXCreateContext failed\n");
 849
 850         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 851                 Sys_Error ("glXMakeCurrent failed\n");
 852
 853         XSync(vidx11_display, False);
 854
 855         scr_width = width;
 856         scr_height = height;
 857
 858         if ((qglGetString = GL_GetProcAddress("glGetString")) == NULL)
 859                 Sys_Error("glGetString not found in %s", gl_driver);
 860
 861         gl_renderer = qglGetString(GL_RENDERER);
 862         gl_vendor = qglGetString(GL_VENDOR);
 863         gl_version = qglGetString(GL_VERSION);
 864         gl_extensions = qglGetString(GL_EXTENSIONS);
 865         gl_platform = "GLX";
 866         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, vidx11_screen);
 867
 868         gl_videosyncavailable = false;
 869
 870 // COMMANDLINEOPTION: Linux GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 871 // COMMANDLINEOPTION: BSD GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 872 // COMMANDLINEOPTION: MacOSX GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 873         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 874 // COMMANDLINEOPTION: Linux GLX: -novideosync disables GLX_SGI_swap_control
 875 // COMMANDLINEOPTION: BSD GLX: -novideosync disables GLX_SGI_swap_control
 876 // COMMANDLINEOPTION: MacOSX GLX: -novideosync disables GLX_SGI_swap_control
 877         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_swap_control", swapcontrolfuncs, "-novideosync", false);
 878
 879         vid_usingmouse = false;
 880         ignoremousemove = true;
 881         vid_hidden = false;
 882         vid_activewindow = true;
 883         GL_Init();
 884         return true;
 885 }
 886
 887 void Sys_SendKeyEvents(void)
 888 {
 889         HandleEvents();
 890 }
 891
 892 /*
 893 ===========
 894 IN_Commands
 895 ===========
 896 */
 897 void IN_Commands (void)
 898 {
 899 }
 900
 901 void IN_Move (void)
 902 {
 903         if (mouse_avail)
 904                 IN_Mouse(mouse_x, mouse_y);
 905         mouse_x = 0;
 906         mouse_y = 0;
 907 }
 908
 909 static void *prjobj = NULL;
 910
 911 int GL_OpenLibrary(const char *name)
 912 {
 913         Con_Printf("Loading OpenGL driver %s\n", name);
 914         GL_CloseLibrary();
 915         if (!(prjobj = dlopen(name, RTLD_LAZY)))
 916         {
 917                 Con_Printf("Unable to open symbol list for %s\n", name);
 918                 return false;
 919         }
 920         strcpy(gl_driver, name);
 921         return true;
 922 }
 923
 924 void GL_CloseLibrary(void)
 925 {
 926         if (prjobj)
 927                 dlclose(prjobj);
 928         prjobj = NULL;
 929         gl_driver[0] = 0;
 930         qglXGetProcAddressARB = NULL;
 931         gl_extensions = "";
 932         gl_platform = "";
 933         gl_platformextensions = "";
 934 }
 935
 936 void *GL_GetProcAddress(const char *name)
 937 {
 938         void *p = NULL;
 939         if (qglXGetProcAddressARB != NULL)
 940                 p = (void *) qglXGetProcAddressARB(name);
 941         if (p == NULL)
 942                 p = (void *) dlsym(prjobj, name);
 943         return p;
 944 }
 945