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