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 <signal.h>
  21
  22 #include <dlfcn.h>
  23
  24 #include <X11/Xlib.h>
  25 #include <X11/Xutil.h>
  26 #include <GL/glx.h>
  27
  28 #include <X11/keysym.h>
  29 #include <X11/cursorfont.h>
  30
  31 #include <X11/extensions/XShm.h>
  32 #if !defined(__APPLE__) && !defined(__MACH__) && !defined(SUNOS)
  33 #include <X11/extensions/xf86dga.h>
  34 #endif
  35 #include <X11/extensions/xf86vmode.h>
  36
  37 #include "quakedef.h"
  38
  39 // Tell startup code that we have a client
  40 int cl_available = true;
  41
  42 // note: if we used the XRandR extension we could support refresh rates
  43 qboolean vid_supportrefreshrate = false;
  44
  45 //GLX prototypes
  46 XVisualInfo *(GLAPIENTRY *qglXChooseVisual)(Display *dpy, int screen, int *attribList);
  47 GLXContext (GLAPIENTRY *qglXCreateContext)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct);
  48 void (GLAPIENTRY *qglXDestroyContext)(Display *dpy, GLXContext ctx);
  49 Bool (GLAPIENTRY *qglXMakeCurrent)(Display *dpy, GLXDrawable drawable, GLXContext ctx);
  50 void (GLAPIENTRY *qglXSwapBuffers)(Display *dpy, GLXDrawable drawable);
  51 const char *(GLAPIENTRY *qglXQueryExtensionsString)(Display *dpy, int screen);
  52
  53 //GLX_ARB_get_proc_address
  54 void *(GLAPIENTRY *qglXGetProcAddressARB)(const GLubyte *procName);
  55
  56 static dllfunction_t getprocaddressfuncs[] =
  57 {
  58         {"glXGetProcAddressARB", (void **) &qglXGetProcAddressARB},
  59         {NULL, NULL}
  60 };
  61
  62 //GLX_SGI_swap_control
  63 GLint (GLAPIENTRY *qglXSwapIntervalSGI)(GLint interval);
  64
  65 static dllfunction_t swapcontrolfuncs[] =
  66 {
  67         {"glXSwapIntervalSGI", (void **) &qglXSwapIntervalSGI},
  68         {NULL, NULL}
  69 };
  70
  71 static Display *vidx11_display = NULL;
  72 static int vidx11_screen;
  73 static Window win;
  74 static GLXContext ctx = NULL;
  75
  76 Atom wm_delete_window_atom;
  77
  78 #define KEY_MASK (KeyPressMask | KeyReleaseMask)
  79 #define MOUSE_MASK (ButtonPressMask | ButtonReleaseMask | \
  80                     PointerMotionMask | ButtonMotionMask)
  81 #define X_MASK (KEY_MASK | MOUSE_MASK | VisibilityChangeMask | \
  82                 StructureNotifyMask | FocusChangeMask | EnterWindowMask | \
  83                 LeaveWindowMask)
  84
  85
  86 static qboolean mouse_avail = true;
  87 static qboolean vid_usingmouse = false;
  88 static qboolean vid_usingvsync = false;
  89 static qboolean vid_usevsync = false;
  90 static qboolean vid_x11_hardwaregammasupported = false;
  91 static qboolean vid_x11_dgasupported = false;
  92 static int vid_x11_gammarampsize = 0;
  93 static float    mouse_x, mouse_y;
  94 static int p_mouse_x, p_mouse_y;
  95
  96 #if !defined(__APPLE__) && !defined(SUNOS)
  97 // 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)
  98 cvar_t vid_dga = {CVAR_SAVE, "vid_dga", "1", "make use of DGA mouse input"};
  99 #endif
 100
 101 qboolean vidmode_ext = false;
 102
 103 static int win_x, win_y;
 104
 105 static XF86VidModeModeInfo init_vidmode;
 106 static qboolean vid_isfullscreen = false;
 107
 108 static Visual *vidx11_visual;
 109 static Colormap vidx11_colormap;
 110
 111 /*-----------------------------------------------------------------------*/
 112
 113 static int XLateKey(XKeyEvent *ev, char *ascii)
 114 {
 115         int key = 0;
 116         char buf[64];
 117         KeySym keysym, shifted;
 118
 119         keysym = XLookupKeysym (ev, 0);
 120         XLookupString(ev, buf, sizeof buf, &shifted, 0);
 121         *ascii = buf[0];
 122
 123         switch(keysym)
 124         {
 125                 case XK_KP_Page_Up:      key = K_KP_PGUP; break;
 126                 case XK_Page_Up:         key = K_PGUP; break;
 127
 128                 case XK_KP_Page_Down: key = K_KP_PGDN; break;
 129                 case XK_Page_Down:       key = K_PGDN; break;
 130
 131                 case XK_KP_Home: key = K_KP_HOME; break;
 132                 case XK_Home:    key = K_HOME; break;
 133
 134                 case XK_KP_End:  key = K_KP_END; break;
 135                 case XK_End:     key = K_END; break;
 136
 137                 case XK_KP_Left: key = K_KP_LEFTARROW; break;
 138                 case XK_Left:    key = K_LEFTARROW; break;
 139
 140                 case XK_KP_Right: key = K_KP_RIGHTARROW; break;
 141                 case XK_Right:  key = K_RIGHTARROW;             break;
 142
 143                 case XK_KP_Down: key = K_KP_DOWNARROW; break;
 144                 case XK_Down:    key = K_DOWNARROW; break;
 145
 146                 case XK_KP_Up:   key = K_KP_UPARROW; break;
 147                 case XK_Up:              key = K_UPARROW;        break;
 148
 149                 case XK_Escape: key = K_ESCAPE;         break;
 150
 151                 case XK_KP_Enter: key = K_KP_ENTER;     break;
 152                 case XK_Return: key = K_ENTER;           break;
 153
 154                 case XK_Tab:            key = K_TAB;                     break;
 155
 156                 case XK_F1:              key = K_F1;                            break;
 157
 158                 case XK_F2:              key = K_F2;                            break;
 159
 160                 case XK_F3:              key = K_F3;                            break;
 161
 162                 case XK_F4:              key = K_F4;                            break;
 163
 164                 case XK_F5:              key = K_F5;                            break;
 165
 166                 case XK_F6:              key = K_F6;                            break;
 167
 168                 case XK_F7:              key = K_F7;                            break;
 169
 170                 case XK_F8:              key = K_F8;                            break;
 171
 172                 case XK_F9:              key = K_F9;                            break;
 173
 174                 case XK_F10:            key = K_F10;                     break;
 175
 176                 case XK_F11:            key = K_F11;                     break;
 177
 178                 case XK_F12:            key = K_F12;                     break;
 179
 180                 case XK_BackSpace: key = K_BACKSPACE; break;
 181
 182                 case XK_KP_Delete: key = K_KP_DEL; break;
 183                 case XK_Delete: key = K_DEL; break;
 184
 185                 case XK_Pause:  key = K_PAUSE;           break;
 186
 187                 case XK_Shift_L:
 188                 case XK_Shift_R:        key = K_SHIFT;          break;
 189
 190                 case XK_Execute:
 191                 case XK_Control_L:
 192                 case XK_Control_R:      key = K_CTRL;            break;
 193
 194                 case XK_Alt_L:
 195                 case XK_Meta_L:
 196                 case XK_ISO_Level3_Shift:
 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 = K_KP_MULTIPLY; 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                 case XK_section:        key = '~'; break;
 211
 212                 default:
 213                         if (keysym < 32)
 214                                 break;
 215
 216                         if (keysym >= 'A' && keysym <= 'Z')
 217                                 key = keysym - 'A' + 'a';
 218                         else
 219                                 key = keysym;
 220
 221                         break;
 222         }
 223
 224         return key;
 225 }
 226
 227 static Cursor CreateNullCursor(Display *display, Window root)
 228 {
 229         Pixmap cursormask;
 230         XGCValues xgc;
 231         GC gc;
 232         XColor dummycolour;
 233         Cursor cursor;
 234
 235         cursormask = XCreatePixmap(display, root, 1, 1, 1);
 236         xgc.function = GXclear;
 237         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
 238         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
 239         dummycolour.pixel = 0;
 240         dummycolour.red = 0;
 241         dummycolour.flags = 04;
 242         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
 243         XFreePixmap(display,cursormask);
 244         XFreeGC(display,gc);
 245         return cursor;
 246 }
 247
 248 static void IN_Activate (qboolean grab)
 249 {
 250         if (!vidx11_display)
 251                 return;
 252         if (grab)
 253         {
 254                 if (!vid_usingmouse && mouse_avail && win)
 255                 {
 256                         XWindowAttributes attribs_1;
 257                         XSetWindowAttributes attribs_2;
 258
 259                         XGetWindowAttributes(vidx11_display, win, &attribs_1);
 260                         attribs_2.event_mask = attribs_1.your_event_mask | KEY_MASK | MOUSE_MASK;
 261                         XChangeWindowAttributes(vidx11_display, win, CWEventMask, &attribs_2);
 262
 263                 // inviso cursor
 264                         XDefineCursor(vidx11_display, win, CreateNullCursor(vidx11_display, win));
 265
 266                         XGrabPointer(vidx11_display, win,  True, 0, GrabModeAsync, GrabModeAsync, win, None, CurrentTime);
 267
 268 #if !defined(__APPLE__) && !defined(SUNOS)
 269                         if (vid_dga.integer && vid_x11_dgasupported)
 270                         {
 271                                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
 272                                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 273                         }
 274                         else
 275 #endif
 276                                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, vid.width / 2, vid.height / 2);
 277
 278                         if (vid_grabkeyboard.integer || vid_isfullscreen)
 279                                 XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 280
 281                         mouse_x = mouse_y = 0;
 282                         cl_ignoremousemove = true;
 283                         vid_usingmouse = true;
 284                 }
 285         }
 286         else
 287         {
 288                 if (vid_usingmouse)
 289                 {
 290 #if !defined(__APPLE__) && !defined(SUNOS)
 291                         if (vid_x11_dgasupported)
 292                                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
 293 #endif
 294
 295                         XUngrabPointer(vidx11_display, CurrentTime);
 296                         XUngrabKeyboard(vidx11_display, CurrentTime);
 297
 298                         // inviso cursor
 299                         if (win)
 300                                 XUndefineCursor(vidx11_display, win);
 301
 302                         cl_ignoremousemove = true;
 303                         vid_usingmouse = false;
 304                 }
 305         }
 306 }
 307
 308 static keynum_t buttonremap[18] =
 309 {
 310         K_MOUSE1,
 311         K_MOUSE3,
 312         K_MOUSE2,
 313         K_MWHEELUP,
 314         K_MWHEELDOWN,
 315         K_MOUSE4,
 316         K_MOUSE5,
 317         K_MOUSE6,
 318         K_MOUSE7,
 319         K_MOUSE8,
 320         K_MOUSE9,
 321         K_MOUSE10,
 322         K_MOUSE11,
 323         K_MOUSE12,
 324         K_MOUSE13,
 325         K_MOUSE14,
 326         K_MOUSE15,
 327         K_MOUSE16,
 328 };
 329
 330 static void HandleEvents(void)
 331 {
 332         XEvent event;
 333         int key;
 334         char ascii;
 335         qboolean dowarp = false;
 336
 337         if (!vidx11_display)
 338                 return;
 339
 340         while (XPending(vidx11_display))
 341         {
 342                 XNextEvent(vidx11_display, &event);
 343
 344                 switch (event.type)
 345                 {
 346                 case KeyPress:
 347                         // key pressed
 348                         key = XLateKey (&event.xkey, &ascii);
 349                         Key_Event(key, ascii, true);
 350                         break;
 351
 352                 case KeyRelease:
 353                         // key released
 354                         key = XLateKey (&event.xkey, &ascii);
 355                         Key_Event(key, ascii, false);
 356                         break;
 357
 358                 case MotionNotify:
 359                         // mouse moved
 360                         if (vid_usingmouse)
 361                         {
 362 #if !defined(__APPLE__) && !defined(SUNOS)
 363                                 if (vid_dga.integer == 1 && vid_x11_dgasupported)
 364                                 {
 365                                         mouse_x += event.xmotion.x_root;
 366                                         mouse_y += event.xmotion.y_root;
 367                                 }
 368                                 else
 369 #endif
 370                                 {
 371
 372                                         if (!event.xmotion.send_event)
 373                                         {
 374                                                 mouse_x += event.xmotion.x - p_mouse_x;
 375                                                 mouse_y += event.xmotion.y - p_mouse_y;
 376                                                 if (abs(vid.width/2 - event.xmotion.x) > vid.width / 4 || abs(vid.height/2 - event.xmotion.y) > vid.height / 4)
 377                                                         dowarp = true;
 378                                         }
 379                                         p_mouse_x = event.xmotion.x;
 380                                         p_mouse_y = event.xmotion.y;
 381                                 }
 382                         }
 383                         //else
 384                         //      ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 385                         break;
 386
 387                 case ButtonPress:
 388                         // mouse button pressed
 389                         if (event.xbutton.button <= 18)
 390                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, true);
 391                         else
 392                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-18 expected\n", event.xbutton.button);
 393                         break;
 394
 395                 case ButtonRelease:
 396                         // mouse button released
 397                         if (event.xbutton.button <= 18)
 398                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, false);
 399                         else
 400                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-18 expected\n", event.xbutton.button);
 401                         break;
 402
 403                 case CreateNotify:
 404                         // window created
 405                         win_x = event.xcreatewindow.x;
 406                         win_y = event.xcreatewindow.y;
 407                         break;
 408
 409                 case ConfigureNotify:
 410                         // window changed size/location
 411                         win_x = event.xconfigure.x;
 412                         win_y = event.xconfigure.y;
 413                         break;
 414                 case DestroyNotify:
 415                         // window has been destroyed
 416                         Sys_Quit(0);
 417                         break;
 418                 case ClientMessage:
 419                         // window manager messages
 420                         if ((event.xclient.format == 32) && ((unsigned int)event.xclient.data.l[0] == wm_delete_window_atom))
 421                                 Sys_Quit(0);
 422                         break;
 423                 case MapNotify:
 424                         // window restored
 425                         vid_hidden = false;
 426                         VID_RestoreSystemGamma();
 427                         break;
 428                 case UnmapNotify:
 429                         // window iconified/rolledup/whatever
 430                         vid_hidden = true;
 431                         VID_RestoreSystemGamma();
 432                         break;
 433                 case FocusIn:
 434                         // window is now the input focus
 435                         vid_activewindow = true;
 436                         break;
 437                 case FocusOut:
 438                         // window is no longer the input focus
 439                         vid_activewindow = false;
 440                         VID_RestoreSystemGamma();
 441                         break;
 442                 case EnterNotify:
 443                         // mouse entered window
 444                         break;
 445                 case LeaveNotify:
 446                         // mouse left window
 447                         break;
 448                 }
 449         }
 450
 451         if (dowarp)
 452         {
 453                 /* move the mouse to the window center again */
 454                 p_mouse_x = vid.width / 2;
 455                 p_mouse_y = vid.height / 2;
 456                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 457         }
 458 }
 459
 460 static void *prjobj = NULL;
 461
 462 static void GL_CloseLibrary(void)
 463 {
 464         if (prjobj)
 465                 dlclose(prjobj);
 466         prjobj = NULL;
 467         gl_driver[0] = 0;
 468         qglXGetProcAddressARB = NULL;
 469         gl_extensions = "";
 470         gl_platform = "";
 471         gl_platformextensions = "";
 472 }
 473
 474 static int GL_OpenLibrary(const char *name)
 475 {
 476         Con_Printf("Loading OpenGL driver %s\n", name);
 477         GL_CloseLibrary();
 478         if (!(prjobj = dlopen(name, RTLD_LAZY | RTLD_GLOBAL)))
 479         {
 480                 Con_Printf("Unable to open symbol list for %s\n", name);
 481                 return false;
 482         }
 483         strlcpy(gl_driver, name, sizeof(gl_driver));
 484         return true;
 485 }
 486
 487 void *GL_GetProcAddress(const char *name)
 488 {
 489         void *p = NULL;
 490         if (qglXGetProcAddressARB != NULL)
 491                 p = (void *) qglXGetProcAddressARB((GLubyte *)name);
 492         if (p == NULL)
 493                 p = (void *) dlsym(prjobj, name);
 494         return p;
 495 }
 496
 497 void VID_Shutdown(void)
 498 {
 499         if (!ctx || !vidx11_display)
 500                 return;
 501
 502         if (vidx11_display)
 503         {
 504                 IN_Activate(false);
 505                 VID_RestoreSystemGamma();
 506
 507                 // FIXME: glXDestroyContext here?
 508                 if (vid_isfullscreen)
 509                         XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, &init_vidmode);
 510                 if (win)
 511                         XDestroyWindow(vidx11_display, win);
 512                 XCloseDisplay(vidx11_display);
 513         }
 514         vid_hidden = true;
 515         vid_isfullscreen = false;
 516         vidx11_display = NULL;
 517         win = 0;
 518         ctx = NULL;
 519
 520         GL_CloseLibrary();
 521         Key_ClearStates ();
 522 }
 523
 524 void signal_handler(int sig)
 525 {
 526         Con_Printf("Received signal %d, exiting...\n", sig);
 527         VID_RestoreSystemGamma();
 528         Sys_Quit(1);
 529 }
 530
 531 void InitSig(void)
 532 {
 533         signal(SIGHUP, signal_handler);
 534         signal(SIGINT, signal_handler);
 535         signal(SIGQUIT, signal_handler);
 536         signal(SIGILL, signal_handler);
 537         signal(SIGTRAP, signal_handler);
 538         signal(SIGIOT, signal_handler);
 539         signal(SIGBUS, signal_handler);
 540         signal(SIGFPE, signal_handler);
 541         signal(SIGSEGV, signal_handler);
 542         signal(SIGTERM, signal_handler);
 543 }
 544
 545 void VID_Finish (qboolean allowmousegrab)
 546 {
 547         qboolean vid_usemouse;
 548
 549         vid_usevsync = vid_vsync.integer && !cls.timedemo && gl_videosyncavailable;
 550         if (vid_usingvsync != vid_usevsync && gl_videosyncavailable)
 551         {
 552                 vid_usingvsync = vid_usevsync;
 553                 if (qglXSwapIntervalSGI (vid_usevsync))
 554                         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");
 555         }
 556
 557         // handle the mouse state when windowed if that's changed
 558         vid_usemouse = false;
 559         if (allowmousegrab && vid_mouse.integer && !key_consoleactive && (key_dest != key_game || !cls.demoplayback))
 560                 vid_usemouse = true;
 561         if (!vid_activewindow)
 562                 vid_usemouse = false;
 563         if (vid_isfullscreen)
 564                 vid_usemouse = true;
 565         IN_Activate(vid_usemouse);
 566
 567         if (r_render.integer)
 568         {
 569                 CHECKGLERROR
 570                 if (r_speeds.integer || gl_finish.integer)
 571                 {
 572                         qglFinish();CHECKGLERROR
 573                 }
 574                 qglXSwapBuffers(vidx11_display, win);CHECKGLERROR
 575         }
 576
 577         if (vid_x11_hardwaregammasupported)
 578                 VID_UpdateGamma(false, vid_x11_gammarampsize);
 579 }
 580
 581 int VID_SetGamma(unsigned short *ramps, int rampsize)
 582 {
 583         return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, rampsize, ramps, ramps + rampsize, ramps + rampsize*2);
 584 }
 585
 586 int VID_GetGamma(unsigned short *ramps, int rampsize)
 587 {
 588         return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, rampsize, ramps, ramps + rampsize, ramps + rampsize*2);
 589 }
 590
 591 void VID_Init(void)
 592 {
 593 #if !defined(__APPLE__) && !defined(SUNOS)
 594         Cvar_RegisterVariable (&vid_dga);
 595 #endif
 596         InitSig(); // trap evil signals
 597 // COMMANDLINEOPTION: Input: -nomouse disables mouse support (see also vid_mouse cvar)
 598         if (COM_CheckParm ("-nomouse"))
 599                 mouse_avail = false;
 600 }
 601
 602 void VID_BuildGLXAttrib(int *attrib, qboolean stencil, qboolean stereobuffer)
 603 {
 604         *attrib++ = GLX_RGBA;
 605         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 606         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 607         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 608         *attrib++ = GLX_DOUBLEBUFFER;
 609         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 610         // if stencil is enabled, ask for alpha too
 611         if (stencil)
 612         {
 613                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 614                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
 615         }
 616         if (stereobuffer)
 617                 *attrib++ = GLX_STEREO;
 618         *attrib++ = None;
 619 }
 620
 621 int VID_InitMode(int fullscreen, int width, int height, int bpp, int refreshrate, int stereobuffer)
 622 {
 623         int i;
 624         int attrib[32];
 625         XSetWindowAttributes attr;
 626         unsigned long mask;
 627         Window root;
 628         XVisualInfo *visinfo;
 629         int MajorVersion, MinorVersion;
 630         const char *drivername;
 631
 632 #if defined(__APPLE__) && defined(__MACH__)
 633         drivername = "/usr/X11R6/lib/libGL.1.dylib";
 634 #else
 635         drivername = "libGL.so.1";
 636 #endif
 637 // 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
 638 // 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
 639 // LordHavoc: although this works on MacOSX, it's useless there (as there is only one system libGL)
 640         i = COM_CheckParm("-gl_driver");
 641         if (i && i < com_argc - 1)
 642                 drivername = com_argv[i + 1];
 643         if (!GL_OpenLibrary(drivername))
 644         {
 645                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 646                 return false;
 647         }
 648
 649         if (!(vidx11_display = XOpenDisplay(NULL)))
 650         {
 651                 Con_Print("Couldn't open the X display\n");
 652                 return false;
 653         }
 654
 655         vidx11_screen = DefaultScreen(vidx11_display);
 656         root = RootWindow(vidx11_display, vidx11_screen);
 657
 658         // Get video mode list
 659         MajorVersion = MinorVersion = 0;
 660         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 661                 vidmode_ext = false;
 662         else
 663         {
 664                 Con_DPrintf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 665                 vidmode_ext = true;
 666         }
 667
 668         if ((qglXChooseVisual = (XVisualInfo *(GLAPIENTRY *)(Display *dpy, int screen, int *attribList))GL_GetProcAddress("glXChooseVisual")) == NULL
 669          || (qglXCreateContext = (GLXContext (GLAPIENTRY *)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct))GL_GetProcAddress("glXCreateContext")) == NULL
 670          || (qglXDestroyContext = (void (GLAPIENTRY *)(Display *dpy, GLXContext ctx))GL_GetProcAddress("glXDestroyContext")) == NULL
 671          || (qglXMakeCurrent = (Bool (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable, GLXContext ctx))GL_GetProcAddress("glXMakeCurrent")) == NULL
 672          || (qglXSwapBuffers = (void (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable))GL_GetProcAddress("glXSwapBuffers")) == NULL
 673          || (qglXQueryExtensionsString = (const char *(GLAPIENTRY *)(Display *dpy, int screen))GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 674         {
 675                 Con_Printf("glX functions not found in %s\n", gl_driver);
 676                 return false;
 677         }
 678
 679         VID_BuildGLXAttrib(attrib, bpp == 32, stereobuffer);
 680         visinfo = qglXChooseVisual(vidx11_display, vidx11_screen, attrib);
 681         if (!visinfo)
 682         {
 683                 Con_Print("Couldn't get an RGB, Double-buffered, Depth visual\n");
 684                 return false;
 685         }
 686
 687         if (vidmode_ext)
 688         {
 689                 int best_fit, best_dist, dist, x, y;
 690
 691                 // Are we going fullscreen?  If so, let's change video mode
 692                 if (fullscreen)
 693                 {
 694                         XF86VidModeModeLine *current_vidmode;
 695                         XF86VidModeModeInfo **vidmodes;
 696                         int num_vidmodes;
 697
 698                         // This nice hack comes from the SDL source code
 699                         current_vidmode = (XF86VidModeModeLine*)((char*)&init_vidmode + sizeof(init_vidmode.dotclock));
 700                         XF86VidModeGetModeLine(vidx11_display, vidx11_screen, (int*)&init_vidmode.dotclock, current_vidmode);
 701
 702                         XF86VidModeGetAllModeLines(vidx11_display, vidx11_screen, &num_vidmodes, &vidmodes);
 703                         best_dist = 9999999;
 704                         best_fit = -1;
 705
 706                         for (i = 0; i < num_vidmodes; i++)
 707                         {
 708                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
 709                                         continue;
 710
 711                                 x = width - vidmodes[i]->hdisplay;
 712                                 y = height - vidmodes[i]->vdisplay;
 713                                 dist = (x * x) + (y * y);
 714                                 if (dist < best_dist)
 715                                 {
 716                                         best_dist = dist;
 717                                         best_fit = i;
 718                                 }
 719                         }
 720
 721                         if (best_fit != -1)
 722                         {
 723                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
 724                                 // to width/height =, so the window will take the full area of
 725                                 // the mode chosen
 726                                 width = vidmodes[best_fit]->hdisplay;
 727                                 height = vidmodes[best_fit]->vdisplay;
 728
 729                                 // change to the mode
 730                                 XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[best_fit]);
 731                                 vid_isfullscreen = true;
 732
 733                                 // Move the viewport to top left
 734                                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 735                         }
 736                         else
 737                                 fullscreen = 0;
 738
 739                         free(vidmodes);
 740                 }
 741         }
 742
 743         // LordHavoc: save the visual for use in gamma ramp settings later
 744         vidx11_visual = visinfo->visual;
 745
 746         /* window attributes */
 747         attr.background_pixel = 0;
 748         attr.border_pixel = 0;
 749         // LordHavoc: save the colormap for later, too
 750         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 751         attr.event_mask = X_MASK;
 752         if (vid_isfullscreen)
 753         {
 754                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 755                 attr.override_redirect = True;
 756                 attr.backing_store = NotUseful;
 757                 attr.save_under = False;
 758         }
 759         else
 760                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 761
 762         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 763         XStoreName(vidx11_display, win, gamename);
 764         XMapWindow(vidx11_display, win);
 765
 766         // LordHavoc: making the close button on a window do the right thing
 767         // seems to involve this mess, sigh...
 768         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 769         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 770
 771         if (vid_isfullscreen)
 772         {
 773                 XMoveWindow(vidx11_display, win, 0, 0);
 774                 XRaiseWindow(vidx11_display, win);
 775                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 776                 XFlush(vidx11_display);
 777                 // Move the viewport to top left
 778                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 779         }
 780
 781         //XSync(vidx11_display, False);
 782
 783         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 784         if (!ctx)
 785         {
 786                 Con_Printf ("glXCreateContext failed\n");
 787                 return false;
 788         }
 789
 790         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 791         {
 792                 Con_Printf ("glXMakeCurrent failed\n");
 793                 return false;
 794         }
 795
 796         XSync(vidx11_display, False);
 797
 798         if ((qglGetString = (const GLubyte* (GLAPIENTRY *)(GLenum name))GL_GetProcAddress("glGetString")) == NULL)
 799         {
 800                 Con_Printf ("glGetString not found in %s\n", gl_driver);
 801                 return false;
 802         }
 803
 804         gl_renderer = (const char *)qglGetString(GL_RENDERER);
 805         gl_vendor = (const char *)qglGetString(GL_VENDOR);
 806         gl_version = (const char *)qglGetString(GL_VERSION);
 807         gl_extensions = (const char *)qglGetString(GL_EXTENSIONS);
 808         gl_platform = "GLX";
 809         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, vidx11_screen);
 810
 811         gl_videosyncavailable = false;
 812
 813 // COMMANDLINEOPTION: Linux GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 814 // COMMANDLINEOPTION: BSD GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 815 // COMMANDLINEOPTION: MacOSX GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 816         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 817 // COMMANDLINEOPTION: Linux GLX: -novideosync disables GLX_SGI_swap_control
 818 // COMMANDLINEOPTION: BSD GLX: -novideosync disables GLX_SGI_swap_control
 819 // COMMANDLINEOPTION: MacOSX GLX: -novideosync disables GLX_SGI_swap_control
 820         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_swap_control", swapcontrolfuncs, "-novideosync", false);
 821
 822         vid_usingmouse = false;
 823         vid_usingvsync = false;
 824         vid_hidden = false;
 825         vid_activewindow = true;
 826         vid_x11_hardwaregammasupported = XF86VidModeGetGammaRampSize(vidx11_display, vidx11_screen, &vid_x11_gammarampsize) != 0;
 827 #if !defined(__APPLE__) && !defined(SUNOS)
 828         vid_x11_dgasupported = XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion);
 829         if (!vid_x11_dgasupported)
 830                 Con_Print( "Failed to detect XF86DGA Mouse extension\n" );
 831 #endif
 832         GL_Init();
 833         return true;
 834 }
 835
 836 void Sys_SendKeyEvents(void)
 837 {
 838         static qboolean sound_active = true;
 839
 840         // enable/disable sound on focus gain/loss
 841         if (!vid_activewindow && sound_active)
 842         {
 843                 S_BlockSound ();
 844                 sound_active = false;
 845         }
 846         else if (vid_activewindow && !sound_active)
 847         {
 848                 S_UnblockSound ();
 849                 sound_active = true;
 850         }
 851
 852         HandleEvents();
 853 }
 854
 855 void IN_Move (void)
 856 {
 857         if (mouse_avail)
 858         {
 859                 in_mouse_x = mouse_x;
 860                 in_mouse_y = mouse_y;
 861         }
 862         mouse_x = 0;
 863         mouse_y = 0;
 864 }