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