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