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__) && !defined(SUNOS)
  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 // note: if we used the XRandR extension we could support refresh rates
  49 qboolean vid_supportrefreshrate = false;
  50
  51 //GLX prototypes
  52 XVisualInfo *(GLAPIENTRY *qglXChooseVisual)(Display *dpy, int screen, int *attribList);
  53 GLXContext (GLAPIENTRY *qglXCreateContext)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct);
  54 void (GLAPIENTRY *qglXDestroyContext)(Display *dpy, GLXContext ctx);
  55 Bool (GLAPIENTRY *qglXMakeCurrent)(Display *dpy, GLXDrawable drawable, GLXContext ctx);
  56 void (GLAPIENTRY *qglXSwapBuffers)(Display *dpy, GLXDrawable drawable);
  57 const char *(GLAPIENTRY *qglXQueryExtensionsString)(Display *dpy, int screen);
  58
  59 //GLX_ARB_get_proc_address
  60 void *(GLAPIENTRY *qglXGetProcAddressARB)(const GLubyte *procName);
  61
  62 static dllfunction_t getprocaddressfuncs[] =
  63 {
  64         {"glXGetProcAddressARB", (void **) &qglXGetProcAddressARB},
  65         {NULL, NULL}
  66 };
  67
  68 //GLX_SGI_swap_control
  69 GLint (GLAPIENTRY *qglXSwapIntervalSGI)(GLint interval);
  70
  71 static dllfunction_t swapcontrolfuncs[] =
  72 {
  73         {"glXSwapIntervalSGI", (void **) &qglXSwapIntervalSGI},
  74         {NULL, NULL}
  75 };
  76
  77 static Display *vidx11_display = NULL;
  78 static int vidx11_screen;
  79 static Window win;
  80 static GLXContext ctx = NULL;
  81
  82 Atom wm_delete_window_atom;
  83
  84 #define KEY_MASK (KeyPressMask | KeyReleaseMask)
  85 #define MOUSE_MASK (ButtonPressMask | ButtonReleaseMask | \
  86                     PointerMotionMask | ButtonMotionMask)
  87 #define X_MASK (KEY_MASK | MOUSE_MASK | VisibilityChangeMask | \
  88                 StructureNotifyMask | FocusChangeMask | EnterWindowMask | \
  89                 LeaveWindowMask)
  90
  91
  92 static qboolean mouse_avail = true;
  93 static qboolean vid_usingmouse = false;
  94 static qboolean vid_usingvsync = false;
  95 static qboolean vid_usevsync = false;
  96 static float    mouse_x, mouse_y;
  97 static int p_mouse_x, p_mouse_y;
  98
  99 #if !defined(__APPLE__) && !defined(SUNOS)
 100 // FIXME: vid_dga_mouseaccel is poorly named, it is actually the multiplier for mouse movement, not an acceleration (which would be a power function or something)
 101 cvar_t vid_dga = {CVAR_SAVE, "vid_dga", "1", "make use of DGA mouse input"};
 102 cvar_t vid_dga_mouseaccel = {0, "vid_dga_mouseaccel", "1", "speed of mouse when using DGA mouse input"};
 103 #endif
 104
 105 qboolean vidmode_ext = false;
 106
 107 static int win_x, win_y;
 108
 109 static XF86VidModeModeInfo **vidmodes;
 110 static int num_vidmodes;
 111 static qboolean vid_isfullscreen = false;
 112
 113 static Visual *vidx11_visual;
 114 static Colormap vidx11_colormap;
 115
 116 /*-----------------------------------------------------------------------*/
 117
 118 static int XLateKey(XKeyEvent *ev, char *ascii)
 119 {
 120         int key = 0;
 121         char buf[64];
 122         KeySym keysym, shifted;
 123
 124         keysym = XLookupKeysym (ev, 0);
 125         XLookupString(ev, buf, sizeof buf, &shifted, 0);
 126         *ascii = buf[0];
 127
 128         switch(keysym)
 129         {
 130                 case XK_KP_Page_Up:      key = K_KP_PGUP; break;
 131                 case XK_Page_Up:         key = K_PGUP; break;
 132
 133                 case XK_KP_Page_Down: key = K_KP_PGDN; break;
 134                 case XK_Page_Down:       key = K_PGDN; break;
 135
 136                 case XK_KP_Home: key = K_KP_HOME; break;
 137                 case XK_Home:    key = K_HOME; break;
 138
 139                 case XK_KP_End:  key = K_KP_END; break;
 140                 case XK_End:     key = K_END; break;
 141
 142                 case XK_KP_Left: key = K_KP_LEFTARROW; break;
 143                 case XK_Left:    key = K_LEFTARROW; break;
 144
 145                 case XK_KP_Right: key = K_KP_RIGHTARROW; break;
 146                 case XK_Right:  key = K_RIGHTARROW;             break;
 147
 148                 case XK_KP_Down: key = K_KP_DOWNARROW; break;
 149                 case XK_Down:    key = K_DOWNARROW; break;
 150
 151                 case XK_KP_Up:   key = K_KP_UPARROW; break;
 152                 case XK_Up:              key = K_UPARROW;        break;
 153
 154                 case XK_Escape: key = K_ESCAPE;         break;
 155
 156                 case XK_KP_Enter: key = K_KP_ENTER;     break;
 157                 case XK_Return: key = K_ENTER;           break;
 158
 159                 case XK_Tab:            key = K_TAB;                     break;
 160
 161                 case XK_F1:              key = K_F1;                            break;
 162
 163                 case XK_F2:              key = K_F2;                            break;
 164
 165                 case XK_F3:              key = K_F3;                            break;
 166
 167                 case XK_F4:              key = K_F4;                            break;
 168
 169                 case XK_F5:              key = K_F5;                            break;
 170
 171                 case XK_F6:              key = K_F6;                            break;
 172
 173                 case XK_F7:              key = K_F7;                            break;
 174
 175                 case XK_F8:              key = K_F8;                            break;
 176
 177                 case XK_F9:              key = K_F9;                            break;
 178
 179                 case XK_F10:            key = K_F10;                     break;
 180
 181                 case XK_F11:            key = K_F11;                     break;
 182
 183                 case XK_F12:            key = K_F12;                     break;
 184
 185                 case XK_BackSpace: key = K_BACKSPACE; break;
 186
 187                 case XK_KP_Delete: key = K_KP_DEL; break;
 188                 case XK_Delete: key = K_DEL; break;
 189
 190                 case XK_Pause:  key = K_PAUSE;           break;
 191
 192                 case XK_Shift_L:
 193                 case XK_Shift_R:        key = K_SHIFT;          break;
 194
 195                 case XK_Execute:
 196                 case XK_Control_L:
 197                 case XK_Control_R:      key = K_CTRL;            break;
 198
 199                 case XK_Alt_L:
 200                 case XK_Meta_L:
 201                 case XK_Alt_R:
 202                 case XK_Meta_R: key = K_ALT;                    break;
 203
 204                 case XK_KP_Begin: key = K_KP_5; break;
 205
 206                 case XK_Insert:key = K_INS; break;
 207                 case XK_KP_Insert: key = K_KP_INS; break;
 208
 209                 case XK_KP_Multiply: key = '*'; break;
 210                 case XK_KP_Add:  key = K_KP_PLUS; break;
 211                 case XK_KP_Subtract: key = K_KP_MINUS; break;
 212                 case XK_KP_Divide: key = K_KP_SLASH; break;
 213
 214                 case XK_section:        key = '~'; break;
 215
 216                 default:
 217                         if (keysym < 32)
 218                                 break;
 219
 220                         if (keysym >= 'A' && keysym <= 'Z')
 221                                 key = keysym - 'A' + 'a';
 222                         else
 223                                 key = keysym;
 224
 225                         break;
 226         }
 227
 228         return key;
 229 }
 230
 231 static Cursor CreateNullCursor(Display *display, Window root)
 232 {
 233         Pixmap cursormask;
 234         XGCValues xgc;
 235         GC gc;
 236         XColor dummycolour;
 237         Cursor cursor;
 238
 239         cursormask = XCreatePixmap(display, root, 1, 1, 1);
 240         xgc.function = GXclear;
 241         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
 242         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
 243         dummycolour.pixel = 0;
 244         dummycolour.red = 0;
 245         dummycolour.flags = 04;
 246         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
 247         XFreePixmap(display,cursormask);
 248         XFreeGC(display,gc);
 249         return cursor;
 250 }
 251
 252 static void IN_Activate (qboolean grab)
 253 {
 254         if (!vidx11_display)
 255                 return;
 256         if (grab)
 257         {
 258                 if (!vid_usingmouse && mouse_avail && win)
 259                 {
 260                         XWindowAttributes attribs_1;
 261                         XSetWindowAttributes attribs_2;
 262
 263                         XGetWindowAttributes(vidx11_display, win, &attribs_1);
 264                         attribs_2.event_mask = attribs_1.your_event_mask | KEY_MASK | MOUSE_MASK;
 265                         XChangeWindowAttributes(vidx11_display, win, CWEventMask, &attribs_2);
 266
 267                 // inviso cursor
 268                         XDefineCursor(vidx11_display, win, CreateNullCursor(vidx11_display, win));
 269
 270                         XGrabPointer(vidx11_display, win,  True, 0, GrabModeAsync, GrabModeAsync, win, None, CurrentTime);
 271
 272 #if !defined(__APPLE__) && !defined(SUNOS)
 273                         if (vid_dga.integer)
 274                         {
 275                                 int MajorVersion, MinorVersion;
 276
 277                                 if (!XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 278                                 {
 279                                         // unable to query, probably not supported
 280                                         Con_Print( "Failed to detect XF86DGA Mouse\n" );
 281                                         Cvar_SetValueQuick(&vid_dga, 0);
 282                                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, vid.width / 2, vid.height / 2);
 283                                 }
 284                                 else
 285                                 {
 286                                         XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
 287                                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 288                                 }
 289                         }
 290                         else
 291 #endif
 292                                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, vid.width / 2, vid.height / 2);
 293
 294                         XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 295
 296                         mouse_x = mouse_y = 0;
 297                         cl_ignoremousemove = true;
 298                         vid_usingmouse = true;
 299                 }
 300         }
 301         else
 302         {
 303                 if (vid_usingmouse)
 304                 {
 305 #if !defined(__APPLE__) && !defined(SUNOS)
 306                         if (vid_dga.integer)
 307                                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
 308 #endif
 309
 310                         XUngrabPointer(vidx11_display, CurrentTime);
 311                         XUngrabKeyboard(vidx11_display, CurrentTime);
 312
 313                         // inviso cursor
 314                         if (win)
 315                                 XUndefineCursor(vidx11_display, win);
 316
 317                         cl_ignoremousemove = true;
 318                         vid_usingmouse = false;
 319                 }
 320         }
 321 }
 322
 323 static keynum_t buttonremap[18] =
 324 {
 325         K_MOUSE1,
 326         K_MOUSE3,
 327         K_MOUSE2,
 328         K_MWHEELUP,
 329         K_MWHEELDOWN,
 330         K_MOUSE4,
 331         K_MOUSE5,
 332         K_MOUSE6,
 333         K_MOUSE7,
 334         K_MOUSE8,
 335         K_MOUSE9,
 336         K_MOUSE10,
 337         K_MOUSE11,
 338         K_MOUSE12,
 339         K_MOUSE13,
 340         K_MOUSE14,
 341         K_MOUSE15,
 342         K_MOUSE16,
 343 };
 344
 345 static void HandleEvents(void)
 346 {
 347         XEvent event;
 348         int key;
 349         char ascii;
 350         qboolean dowarp = false;
 351
 352         if (!vidx11_display)
 353                 return;
 354
 355         while (XPending(vidx11_display))
 356         {
 357                 XNextEvent(vidx11_display, &event);
 358
 359                 switch (event.type)
 360                 {
 361                 case KeyPress:
 362                         // key pressed
 363                         key = XLateKey (&event.xkey, &ascii);
 364                         Key_Event(key, ascii, true);
 365                         break;
 366
 367                 case KeyRelease:
 368                         // key released
 369                         key = XLateKey (&event.xkey, &ascii);
 370                         Key_Event(key, ascii, false);
 371                         break;
 372
 373                 case MotionNotify:
 374                         // mouse moved
 375                         if (vid_usingmouse)
 376                         {
 377 #if !defined(__APPLE__) && !defined(SUNOS)
 378                                 if (vid_dga.integer == 1)
 379                                 {
 380                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
 381                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
 382                                 }
 383                                 else
 384 #endif
 385                                 {
 386
 387                                         if (!event.xmotion.send_event)
 388                                         {
 389                                                 mouse_x += event.xmotion.x - p_mouse_x;
 390                                                 mouse_y += event.xmotion.y - p_mouse_y;
 391                                                 if (abs(vid.width/2 - event.xmotion.x) > vid.width / 4 || abs(vid.height/2 - event.xmotion.y) > vid.height / 4)
 392                                                         dowarp = true;
 393                                         }
 394                                         p_mouse_x = event.xmotion.x;
 395                                         p_mouse_y = event.xmotion.y;
 396                                 }
 397                         }
 398                         //else
 399                         //      ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 400                         break;
 401
 402                 case ButtonPress:
 403                         // mouse button pressed
 404                         if (event.xbutton.button <= 18)
 405                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, true);
 406                         else
 407                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-18 expected\n", event.xbutton.button);
 408                         break;
 409
 410                 case ButtonRelease:
 411                         // mouse button released
 412                         if (event.xbutton.button <= 18)
 413                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, false);
 414                         else
 415                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-18 expected\n", event.xbutton.button);
 416                         break;
 417
 418                 case CreateNotify:
 419                         // window created
 420                         win_x = event.xcreatewindow.x;
 421                         win_y = event.xcreatewindow.y;
 422                         break;
 423
 424                 case ConfigureNotify:
 425                         // window changed size/location
 426                         win_x = event.xconfigure.x;
 427                         win_y = event.xconfigure.y;
 428                         break;
 429                 case DestroyNotify:
 430                         // window has been destroyed
 431                         Sys_Quit();
 432                         break;
 433                 case ClientMessage:
 434                         // window manager messages
 435                         if ((event.xclient.format == 32) && ((unsigned int)event.xclient.data.l[0] == wm_delete_window_atom))
 436                                 Sys_Quit();
 437                         break;
 438                 case MapNotify:
 439                         // window restored
 440                         vid_hidden = false;
 441                         vid_activewindow = false;
 442                         VID_RestoreSystemGamma();
 443                         break;
 444                 case UnmapNotify:
 445                         // window iconified/rolledup/whatever
 446                         vid_hidden = true;
 447                         vid_activewindow = false;
 448                         VID_RestoreSystemGamma();
 449                         break;
 450                 case FocusIn:
 451                         // window is now the input focus
 452                         vid_activewindow = true;
 453                         break;
 454                 case FocusOut:
 455                         // window is no longer the input focus
 456                         vid_activewindow = false;
 457                         VID_RestoreSystemGamma();
 458                         break;
 459                 case EnterNotify:
 460                         // mouse entered window
 461                         break;
 462                 case LeaveNotify:
 463                         // mouse left window
 464                         break;
 465                 }
 466         }
 467
 468         if (dowarp)
 469         {
 470                 /* move the mouse to the window center again */
 471                 p_mouse_x = vid.width / 2;
 472                 p_mouse_y = vid.height / 2;
 473                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 474         }
 475 }
 476
 477 static void *prjobj = NULL;
 478
 479 static void GL_CloseLibrary(void)
 480 {
 481         if (prjobj)
 482                 dlclose(prjobj);
 483         prjobj = NULL;
 484         gl_driver[0] = 0;
 485         qglXGetProcAddressARB = NULL;
 486         gl_extensions = "";
 487         gl_platform = "";
 488         gl_platformextensions = "";
 489 }
 490
 491 static int GL_OpenLibrary(const char *name)
 492 {
 493         Con_Printf("Loading OpenGL driver %s\n", name);
 494         GL_CloseLibrary();
 495         if (!(prjobj = dlopen(name, RTLD_LAZY)))
 496         {
 497                 Con_Printf("Unable to open symbol list for %s\n", name);
 498                 return false;
 499         }
 500         strcpy(gl_driver, name);
 501         return true;
 502 }
 503
 504 void *GL_GetProcAddress(const char *name)
 505 {
 506         void *p = NULL;
 507         if (qglXGetProcAddressARB != NULL)
 508                 p = (void *) qglXGetProcAddressARB((GLubyte *)name);
 509         if (p == NULL)
 510                 p = (void *) dlsym(prjobj, name);
 511         return p;
 512 }
 513
 514 void VID_Shutdown(void)
 515 {
 516         if (!ctx || !vidx11_display)
 517                 return;
 518
 519         if (vidx11_display)
 520         {
 521                 IN_Activate(false);
 522                 VID_RestoreSystemGamma();
 523
 524                 // FIXME: glXDestroyContext here?
 525                 if (vid_isfullscreen)
 526                         XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[0]);
 527                 if (win)
 528                         XDestroyWindow(vidx11_display, win);
 529                 XCloseDisplay(vidx11_display);
 530         }
 531         vid_hidden = true;
 532         vid_isfullscreen = false;
 533         vidx11_display = NULL;
 534         win = 0;
 535         ctx = NULL;
 536
 537         GL_CloseLibrary();
 538         Key_ClearStates ();
 539 }
 540
 541 void signal_handler(int sig)
 542 {
 543         Con_Printf("Received signal %d, exiting...\n", sig);
 544         VID_RestoreSystemGamma();
 545         Sys_Quit();
 546         exit(0);
 547 }
 548
 549 void InitSig(void)
 550 {
 551         signal(SIGHUP, signal_handler);
 552         signal(SIGINT, signal_handler);
 553         signal(SIGQUIT, signal_handler);
 554         signal(SIGILL, signal_handler);
 555         signal(SIGTRAP, signal_handler);
 556         signal(SIGIOT, signal_handler);
 557         signal(SIGBUS, signal_handler);
 558         signal(SIGFPE, signal_handler);
 559         signal(SIGSEGV, signal_handler);
 560         signal(SIGTERM, signal_handler);
 561 }
 562
 563 void VID_Finish (void)
 564 {
 565         qboolean vid_usemouse;
 566
 567         vid_usevsync = vid_vsync.integer && !cls.timedemo && gl_videosyncavailable;
 568         if (vid_usingvsync != vid_usevsync && gl_videosyncavailable)
 569         {
 570                 vid_usingvsync = vid_usevsync;
 571                 if (qglXSwapIntervalSGI (vid_usevsync))
 572                         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");
 573         }
 574
 575 // handle the mouse state when windowed if that's changed
 576         vid_usemouse = false;
 577         if (vid_mouse.integer && !key_consoleactive && !cls.demoplayback)
 578                 vid_usemouse = true;
 579         if (!vid_activewindow)
 580                 vid_usemouse = false;
 581         if (vid_isfullscreen)
 582                 vid_usemouse = true;
 583         IN_Activate(vid_usemouse);
 584
 585         if (r_render.integer)
 586         {
 587                 if (r_speeds.integer || gl_finish.integer)
 588                         qglFinish();
 589                 qglXSwapBuffers(vidx11_display, win);
 590         }
 591 }
 592
 593 int VID_SetGamma(unsigned short *ramps)
 594 {
 595         int rampsize;
 596         // FIXME: it would be good to generate ramps of the size reported by X,
 597         // for instance Quadro cards seem to use 1024 color ramps not 256
 598         if(!XF86VidModeGetGammaRampSize(vidx11_display, vidx11_screen, &rampsize))
 599                 return 0;
 600         if(rampsize != 256)
 601                 return 0;
 602         return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 603 }
 604
 605 int VID_GetGamma(unsigned short *ramps)
 606 {
 607         int rampsize;
 608         if(!XF86VidModeGetGammaRampSize(vidx11_display, vidx11_screen, &rampsize))
 609                 return 0;
 610         if(rampsize != 256)
 611                 return 0;
 612         return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 613 }
 614
 615 void VID_Init(void)
 616 {
 617 #if !defined(__APPLE__) && !defined(SUNOS)
 618         Cvar_RegisterVariable (&vid_dga);
 619         Cvar_RegisterVariable (&vid_dga_mouseaccel);
 620 #endif
 621         InitSig(); // trap evil signals
 622 // COMMANDLINEOPTION: Input: -nomouse disables mouse support (see also vid_mouse cvar)
 623         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
 624                 mouse_avail = false;
 625 }
 626
 627 void VID_BuildGLXAttrib(int *attrib, int stencil)
 628 {
 629         *attrib++ = GLX_RGBA;
 630         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 631         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 632         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 633         *attrib++ = GLX_DOUBLEBUFFER;
 634         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 635         // if stencil is enabled, ask for alpha too
 636         if (stencil)
 637         {
 638                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 639                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
 640         }
 641         *attrib++ = None;
 642 }
 643
 644 int VID_InitMode(int fullscreen, int width, int height, int bpp, int refreshrate)
 645 {
 646         int i;
 647         int attrib[32];
 648         XSetWindowAttributes attr;
 649         unsigned long mask;
 650         Window root;
 651         XVisualInfo *visinfo;
 652         int MajorVersion, MinorVersion;
 653         const char *drivername;
 654
 655 #if defined(__APPLE__) && defined(__MACH__)
 656         drivername = "/usr/X11R6/lib/libGL.1.dylib";
 657 #else
 658         drivername = "libGL.so.1";
 659 #endif
 660 // 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
 661 // 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
 662 // LordHavoc: although this works on MacOSX, it's useless there (as there is only one system libGL)
 663         i = COM_CheckParm("-gl_driver");
 664         if (i && i < com_argc - 1)
 665                 drivername = com_argv[i + 1];
 666         if (!GL_OpenLibrary(drivername))
 667         {
 668                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 669                 return false;
 670         }
 671
 672         if (!(vidx11_display = XOpenDisplay(NULL)))
 673         {
 674                 Con_Print("Couldn't open the X display\n");
 675                 return false;
 676         }
 677
 678         vidx11_screen = DefaultScreen(vidx11_display);
 679         root = RootWindow(vidx11_display, vidx11_screen);
 680
 681         // Get video mode list
 682         MajorVersion = MinorVersion = 0;
 683         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 684                 vidmode_ext = false;
 685         else
 686         {
 687                 Con_DPrintf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 688                 vidmode_ext = true;
 689         }
 690
 691         if ((qglXChooseVisual = (XVisualInfo *(GLAPIENTRY *)(Display *dpy, int screen, int *attribList))GL_GetProcAddress("glXChooseVisual")) == NULL
 692          || (qglXCreateContext = (GLXContext (GLAPIENTRY *)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct))GL_GetProcAddress("glXCreateContext")) == NULL
 693          || (qglXDestroyContext = (void (GLAPIENTRY *)(Display *dpy, GLXContext ctx))GL_GetProcAddress("glXDestroyContext")) == NULL
 694          || (qglXMakeCurrent = (Bool (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable, GLXContext ctx))GL_GetProcAddress("glXMakeCurrent")) == NULL
 695          || (qglXSwapBuffers = (void (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable))GL_GetProcAddress("glXSwapBuffers")) == NULL
 696          || (qglXQueryExtensionsString = (const char *(GLAPIENTRY *)(Display *dpy, int screen))GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 697         {
 698                 Con_Printf("glX functions not found in %s\n", gl_driver);
 699                 return false;
 700         }
 701
 702         VID_BuildGLXAttrib(attrib, bpp == 32);
 703         visinfo = qglXChooseVisual(vidx11_display, vidx11_screen, attrib);
 704         if (!visinfo)
 705         {
 706                 Con_Print("Couldn't get an RGB, Double-buffered, Depth visual\n");
 707                 return false;
 708         }
 709
 710         if (vidmode_ext)
 711         {
 712                 int best_fit, best_dist, dist, x, y;
 713
 714                 // Are we going fullscreen?  If so, let's change video mode
 715                 if (fullscreen)
 716                 {
 717                         XF86VidModeGetAllModeLines(vidx11_display, vidx11_screen, &num_vidmodes, &vidmodes);
 718                         best_dist = 9999999;
 719                         best_fit = -1;
 720
 721                         for (i = 0; i < num_vidmodes; i++)
 722                         {
 723                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
 724                                         continue;
 725
 726                                 x = width - vidmodes[i]->hdisplay;
 727                                 y = height - vidmodes[i]->vdisplay;
 728                                 dist = (x * x) + (y * y);
 729                                 if (dist < best_dist)
 730                                 {
 731                                         best_dist = dist;
 732                                         best_fit = i;
 733                                 }
 734                         }
 735
 736                         if (best_fit != -1)
 737                         {
 738                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
 739                                 // to width/height =, so the window will take the full area of
 740                                 // the mode chosen
 741                                 width = vidmodes[best_fit]->hdisplay;
 742                                 height = vidmodes[best_fit]->vdisplay;
 743
 744                                 // change to the mode
 745                                 XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[best_fit]);
 746                                 vid_isfullscreen = true;
 747
 748                                 // Move the viewport to top left
 749                                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 750                         }
 751                         else
 752                                 fullscreen = 0;
 753                 }
 754         }
 755
 756         // LordHavoc: save the visual for use in gamma ramp settings later
 757         vidx11_visual = visinfo->visual;
 758
 759         /* window attributes */
 760         attr.background_pixel = 0;
 761         attr.border_pixel = 0;
 762         // LordHavoc: save the colormap for later, too
 763         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 764         attr.event_mask = X_MASK;
 765         if (vid_isfullscreen)
 766         {
 767                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 768                 attr.override_redirect = True;
 769                 attr.backing_store = NotUseful;
 770                 attr.save_under = False;
 771         }
 772         else
 773                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 774
 775         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 776         XStoreName(vidx11_display, win, gamename);
 777         XMapWindow(vidx11_display, win);
 778
 779         // LordHavoc: making the close button on a window do the right thing
 780         // seems to involve this mess, sigh...
 781         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 782         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 783
 784         if (vid_isfullscreen)
 785         {
 786                 XMoveWindow(vidx11_display, win, 0, 0);
 787                 XRaiseWindow(vidx11_display, win);
 788                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 789                 XFlush(vidx11_display);
 790                 // Move the viewport to top left
 791                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 792         }
 793
 794         //XSync(vidx11_display, False);
 795
 796         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 797         if (!ctx)
 798         {
 799                 Con_Printf ("glXCreateContext failed\n");
 800                 return false;
 801         }
 802
 803         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 804         {
 805                 Con_Printf ("glXMakeCurrent failed\n");
 806                 return false;
 807         }
 808
 809         XSync(vidx11_display, False);
 810
 811         if ((qglGetString = (const GLubyte* (GLAPIENTRY *)(GLenum name))GL_GetProcAddress("glGetString")) == NULL)
 812         {
 813                 Con_Printf ("glGetString not found in %s\n", gl_driver);
 814                 return false;
 815         }
 816
 817         gl_renderer = (const char *)qglGetString(GL_RENDERER);
 818         gl_vendor = (const char *)qglGetString(GL_VENDOR);
 819         gl_version = (const char *)qglGetString(GL_VERSION);
 820         gl_extensions = (const char *)qglGetString(GL_EXTENSIONS);
 821         gl_platform = "GLX";
 822         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, vidx11_screen);
 823
 824         gl_videosyncavailable = false;
 825
 826 // COMMANDLINEOPTION: Linux GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 827 // COMMANDLINEOPTION: BSD GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 828 // COMMANDLINEOPTION: MacOSX GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 829         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 830 // COMMANDLINEOPTION: Linux GLX: -novideosync disables GLX_SGI_swap_control
 831 // COMMANDLINEOPTION: BSD GLX: -novideosync disables GLX_SGI_swap_control
 832 // COMMANDLINEOPTION: MacOSX GLX: -novideosync disables GLX_SGI_swap_control
 833         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_swap_control", swapcontrolfuncs, "-novideosync", false);
 834
 835         vid_usingmouse = false;
 836         vid_usingvsync = false;
 837         vid_hidden = false;
 838         vid_activewindow = true;
 839         GL_Init();
 840         return true;
 841 }
 842
 843 void Sys_SendKeyEvents(void)
 844 {
 845         HandleEvents();
 846 }
 847
 848 void IN_Move (void)
 849 {
 850         if (mouse_avail)
 851         {
 852                 in_mouse_x = mouse_x;
 853                 in_mouse_y = mouse_y;
 854         }
 855         mouse_x = 0;
 856         mouse_y = 0;
 857 }