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 cvar_t vid_dgamouse = {CVAR_SAVE, "vid_dgamouse", "1", "make use of DGA mouse input"};
  98 #endif
  99
 100 qboolean vidmode_ext = false;
 101
 102 static int win_x, win_y;
 103
 104 static XF86VidModeModeInfo init_vidmode;
 105 static qboolean vid_isfullscreen = false;
 106
 107 static Visual *vidx11_visual;
 108 static Colormap vidx11_colormap;
 109
 110 /*-----------------------------------------------------------------------*/
 111
 112 static int XLateKey(XKeyEvent *ev, char *ascii)
 113 {
 114         int key = 0;
 115         char buf[64];
 116         KeySym keysym, shifted;
 117
 118         keysym = XLookupKeysym (ev, 0);
 119         XLookupString(ev, buf, sizeof buf, &shifted, 0);
 120         *ascii = buf[0];
 121
 122         switch(keysym)
 123         {
 124                 case XK_KP_Page_Up:      key = K_KP_PGUP; break;
 125                 case XK_Page_Up:         key = K_PGUP; break;
 126
 127                 case XK_KP_Page_Down: key = K_KP_PGDN; break;
 128                 case XK_Page_Down:       key = K_PGDN; break;
 129
 130                 case XK_KP_Home: key = K_KP_HOME; break;
 131                 case XK_Home:    key = K_HOME; break;
 132
 133                 case XK_KP_End:  key = K_KP_END; break;
 134                 case XK_End:     key = K_END; break;
 135
 136                 case XK_KP_Left: key = K_KP_LEFTARROW; break;
 137                 case XK_Left:    key = K_LEFTARROW; break;
 138
 139                 case XK_KP_Right: key = K_KP_RIGHTARROW; break;
 140                 case XK_Right:  key = K_RIGHTARROW;             break;
 141
 142                 case XK_KP_Down: key = K_KP_DOWNARROW; break;
 143                 case XK_Down:    key = K_DOWNARROW; break;
 144
 145                 case XK_KP_Up:   key = K_KP_UPARROW; break;
 146                 case XK_Up:              key = K_UPARROW;        break;
 147
 148                 case XK_Escape: key = K_ESCAPE;         break;
 149
 150                 case XK_KP_Enter: key = K_KP_ENTER;     break;
 151                 case XK_Return: key = K_ENTER;           break;
 152
 153                 case XK_Tab:            key = K_TAB;                     break;
 154
 155                 case XK_F1:              key = K_F1;                            break;
 156
 157                 case XK_F2:              key = K_F2;                            break;
 158
 159                 case XK_F3:              key = K_F3;                            break;
 160
 161                 case XK_F4:              key = K_F4;                            break;
 162
 163                 case XK_F5:              key = K_F5;                            break;
 164
 165                 case XK_F6:              key = K_F6;                            break;
 166
 167                 case XK_F7:              key = K_F7;                            break;
 168
 169                 case XK_F8:              key = K_F8;                            break;
 170
 171                 case XK_F9:              key = K_F9;                            break;
 172
 173                 case XK_F10:            key = K_F10;                     break;
 174
 175                 case XK_F11:            key = K_F11;                     break;
 176
 177                 case XK_F12:            key = K_F12;                     break;
 178
 179                 case XK_BackSpace: key = K_BACKSPACE; break;
 180
 181                 case XK_KP_Delete: key = K_KP_DEL; break;
 182                 case XK_Delete: key = K_DEL; break;
 183
 184                 case XK_Pause:  key = K_PAUSE;           break;
 185
 186                 case XK_Shift_L:
 187                 case XK_Shift_R:        key = K_SHIFT;          break;
 188
 189                 case XK_Execute:
 190                 case XK_Control_L:
 191                 case XK_Control_R:      key = K_CTRL;            break;
 192
 193                 case XK_Alt_L:
 194                 case XK_Meta_L:
 195                 case XK_ISO_Level3_Shift:
 196                 case XK_Alt_R:
 197                 case XK_Meta_R: key = K_ALT;                    break;
 198
 199                 case XK_KP_Begin: key = K_KP_5; break;
 200
 201                 case XK_Insert:key = K_INS; break;
 202                 case XK_KP_Insert: key = K_KP_INS; break;
 203
 204                 case XK_KP_Multiply: key = K_KP_MULTIPLY; break;
 205                 case XK_KP_Add:  key = K_KP_PLUS; break;
 206                 case XK_KP_Subtract: key = K_KP_MINUS; break;
 207                 case XK_KP_Divide: key = K_KP_SLASH; break;
 208
 209                 case XK_section:        key = '~'; break;
 210
 211                 default:
 212                         if (keysym < 32)
 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 #if !defined(__APPLE__) && !defined(SUNOS)
 268                         if (vid_dgamouse.integer && vid_x11_dgasupported)
 269                         {
 270                                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
 271                                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 272                         }
 273                         else
 274 #endif
 275                                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, vid.width / 2, vid.height / 2);
 276
 277                         if (vid_grabkeyboard.integer || vid_isfullscreen)
 278                                 XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 279
 280                         mouse_x = mouse_y = 0;
 281                         cl_ignoremousemove = true;
 282                         vid_usingmouse = true;
 283                 }
 284         }
 285         else
 286         {
 287                 if (vid_usingmouse)
 288                 {
 289 #if !defined(__APPLE__) && !defined(SUNOS)
 290                         if (vid_x11_dgasupported)
 291                                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
 292 #endif
 293
 294                         XUngrabPointer(vidx11_display, CurrentTime);
 295                         XUngrabKeyboard(vidx11_display, CurrentTime);
 296
 297                         // inviso cursor
 298                         if (win)
 299                                 XUndefineCursor(vidx11_display, win);
 300
 301                         cl_ignoremousemove = true;
 302                         vid_usingmouse = false;
 303                 }
 304         }
 305 }
 306
 307 static keynum_t buttonremap[18] =
 308 {
 309         K_MOUSE1,
 310         K_MOUSE3,
 311         K_MOUSE2,
 312         K_MWHEELUP,
 313         K_MWHEELDOWN,
 314         K_MOUSE4,
 315         K_MOUSE5,
 316         K_MOUSE6,
 317         K_MOUSE7,
 318         K_MOUSE8,
 319         K_MOUSE9,
 320         K_MOUSE10,
 321         K_MOUSE11,
 322         K_MOUSE12,
 323         K_MOUSE13,
 324         K_MOUSE14,
 325         K_MOUSE15,
 326         K_MOUSE16,
 327 };
 328
 329 static void HandleEvents(void)
 330 {
 331         XEvent event;
 332         int key;
 333         char ascii;
 334         qboolean dowarp = false;
 335
 336         if (!vidx11_display)
 337                 return;
 338
 339         while (XPending(vidx11_display))
 340         {
 341                 XNextEvent(vidx11_display, &event);
 342
 343                 switch (event.type)
 344                 {
 345                 case KeyPress:
 346                         // key pressed
 347                         key = XLateKey (&event.xkey, &ascii);
 348                         Key_Event(key, ascii, true);
 349                         break;
 350
 351                 case KeyRelease:
 352                         // key released
 353                         key = XLateKey (&event.xkey, &ascii);
 354                         Key_Event(key, ascii, false);
 355                         break;
 356
 357                 case MotionNotify:
 358                         // mouse moved
 359                         if (vid_usingmouse)
 360                         {
 361 #if !defined(__APPLE__) && !defined(SUNOS)
 362                                 if (vid_dgamouse.integer == 1 && vid_x11_dgasupported)
 363                                 {
 364                                         mouse_x += event.xmotion.x_root;
 365                                         mouse_y += event.xmotion.y_root;
 366                                 }
 367                                 else
 368 #endif
 369                                 {
 370
 371                                         if (!event.xmotion.send_event)
 372                                         {
 373                                                 mouse_x += event.xmotion.x - p_mouse_x;
 374                                                 mouse_y += event.xmotion.y - p_mouse_y;
 375                                                 if (abs(vid.width/2 - event.xmotion.x) > vid.width / 4 || abs(vid.height/2 - event.xmotion.y) > vid.height / 4)
 376                                                         dowarp = true;
 377                                         }
 378                                         p_mouse_x = event.xmotion.x;
 379                                         p_mouse_y = event.xmotion.y;
 380                                 }
 381                         }
 382                         //else
 383                         //      ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 384                         break;
 385
 386                 case ButtonPress:
 387                         // mouse button pressed
 388                         if (event.xbutton.button <= 18)
 389                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, true);
 390                         else
 391                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-18 expected\n", event.xbutton.button);
 392                         break;
 393
 394                 case ButtonRelease:
 395                         // mouse button released
 396                         if (event.xbutton.button <= 18)
 397                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, false);
 398                         else
 399                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-18 expected\n", event.xbutton.button);
 400                         break;
 401
 402                 case CreateNotify:
 403                         // window created
 404                         win_x = event.xcreatewindow.x;
 405                         win_y = event.xcreatewindow.y;
 406                         break;
 407
 408                 case ConfigureNotify:
 409                         // window changed size/location
 410                         win_x = event.xconfigure.x;
 411                         win_y = event.xconfigure.y;
 412                         break;
 413                 case DestroyNotify:
 414                         // window has been destroyed
 415                         Sys_Quit(0);
 416                         break;
 417                 case ClientMessage:
 418                         // window manager messages
 419                         if ((event.xclient.format == 32) && ((unsigned int)event.xclient.data.l[0] == wm_delete_window_atom))
 420                                 Sys_Quit(0);
 421                         break;
 422                 case MapNotify:
 423                         // window restored
 424                         vid_hidden = false;
 425                         VID_RestoreSystemGamma();
 426                         break;
 427                 case UnmapNotify:
 428                         // window iconified/rolledup/whatever
 429                         vid_hidden = true;
 430                         VID_RestoreSystemGamma();
 431                         break;
 432                 case FocusIn:
 433                         // window is now the input focus
 434                         vid_activewindow = true;
 435                         break;
 436                 case FocusOut:
 437                         // window is no longer the input focus
 438                         vid_activewindow = false;
 439                         VID_RestoreSystemGamma();
 440                         break;
 441                 case EnterNotify:
 442                         // mouse entered window
 443                         break;
 444                 case LeaveNotify:
 445                         // mouse left window
 446                         break;
 447                 }
 448         }
 449
 450         if (dowarp)
 451         {
 452                 /* move the mouse to the window center again */
 453                 p_mouse_x = vid.width / 2;
 454                 p_mouse_y = vid.height / 2;
 455                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 456         }
 457 }
 458
 459 static void *prjobj = NULL;
 460
 461 static void GL_CloseLibrary(void)
 462 {
 463         if (prjobj)
 464                 dlclose(prjobj);
 465         prjobj = NULL;
 466         gl_driver[0] = 0;
 467         qglXGetProcAddressARB = NULL;
 468         gl_extensions = "";
 469         gl_platform = "";
 470         gl_platformextensions = "";
 471 }
 472
 473 static int GL_OpenLibrary(const char *name)
 474 {
 475         Con_Printf("Loading OpenGL driver %s\n", name);
 476         GL_CloseLibrary();
 477         if (!(prjobj = dlopen(name, RTLD_LAZY | RTLD_GLOBAL)))
 478         {
 479                 Con_Printf("Unable to open symbol list for %s\n", name);
 480                 return false;
 481         }
 482         strlcpy(gl_driver, name, sizeof(gl_driver));
 483         return true;
 484 }
 485
 486 void *GL_GetProcAddress(const char *name)
 487 {
 488         void *p = NULL;
 489         if (qglXGetProcAddressARB != NULL)
 490                 p = (void *) qglXGetProcAddressARB((GLubyte *)name);
 491         if (p == NULL)
 492                 p = (void *) dlsym(prjobj, name);
 493         return p;
 494 }
 495
 496 void VID_Shutdown(void)
 497 {
 498         if (!ctx || !vidx11_display)
 499                 return;
 500
 501         if (vidx11_display)
 502         {
 503                 IN_Activate(false);
 504                 VID_RestoreSystemGamma();
 505
 506                 // FIXME: glXDestroyContext here?
 507                 if (vid_isfullscreen)
 508                         XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, &init_vidmode);
 509                 if (win)
 510                         XDestroyWindow(vidx11_display, win);
 511                 XCloseDisplay(vidx11_display);
 512         }
 513         vid_hidden = true;
 514         vid_isfullscreen = false;
 515         vidx11_display = NULL;
 516         win = 0;
 517         ctx = NULL;
 518
 519         GL_CloseLibrary();
 520         Key_ClearStates ();
 521 }
 522
 523 void signal_handler(int sig)
 524 {
 525         Con_Printf("Received signal %d, exiting...\n", sig);
 526         VID_RestoreSystemGamma();
 527         Sys_Quit(1);
 528 }
 529
 530 void InitSig(void)
 531 {
 532         signal(SIGHUP, signal_handler);
 533         signal(SIGINT, signal_handler);
 534         signal(SIGQUIT, signal_handler);
 535         signal(SIGILL, signal_handler);
 536         signal(SIGTRAP, signal_handler);
 537         signal(SIGIOT, signal_handler);
 538         signal(SIGBUS, signal_handler);
 539         signal(SIGFPE, signal_handler);
 540         signal(SIGSEGV, signal_handler);
 541         signal(SIGTERM, signal_handler);
 542 }
 543
 544 void VID_Finish (qboolean allowmousegrab)
 545 {
 546         qboolean vid_usemouse;
 547
 548         vid_usevsync = vid_vsync.integer && !cls.timedemo && gl_videosyncavailable;
 549         if (vid_usingvsync != vid_usevsync && gl_videosyncavailable)
 550         {
 551                 vid_usingvsync = vid_usevsync;
 552                 if (qglXSwapIntervalSGI (vid_usevsync))
 553                         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");
 554         }
 555
 556         // handle the mouse state when windowed if that's changed
 557         vid_usemouse = false;
 558         if (allowmousegrab && vid_mouse.integer && !key_consoleactive && (key_dest != key_game || !cls.demoplayback))
 559                 vid_usemouse = true;
 560         if (!vid_activewindow)
 561                 vid_usemouse = false;
 562         if (vid_isfullscreen)
 563                 vid_usemouse = true;
 564         IN_Activate(vid_usemouse);
 565
 566         if (r_render.integer)
 567         {
 568                 CHECKGLERROR
 569                 if (r_speeds.integer || gl_finish.integer)
 570                 {
 571                         qglFinish();CHECKGLERROR
 572                 }
 573                 qglXSwapBuffers(vidx11_display, win);CHECKGLERROR
 574         }
 575
 576         if (vid_x11_hardwaregammasupported)
 577                 VID_UpdateGamma(false, vid_x11_gammarampsize);
 578 }
 579
 580 int VID_SetGamma(unsigned short *ramps, int rampsize)
 581 {
 582         return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, rampsize, ramps, ramps + rampsize, ramps + rampsize*2);
 583 }
 584
 585 int VID_GetGamma(unsigned short *ramps, int rampsize)
 586 {
 587         return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, rampsize, ramps, ramps + rampsize, ramps + rampsize*2);
 588 }
 589
 590 void VID_Init(void)
 591 {
 592 #if !defined(__APPLE__) && !defined(SUNOS)
 593         Cvar_RegisterVariable (&vid_dgamouse);
 594 #endif
 595         InitSig(); // trap evil signals
 596 // COMMANDLINEOPTION: Input: -nomouse disables mouse support (see also vid_mouse cvar)
 597         if (COM_CheckParm ("-nomouse"))
 598                 mouse_avail = false;
 599 }
 600
 601 void VID_BuildGLXAttrib(int *attrib, qboolean stencil, qboolean stereobuffer)
 602 {
 603         *attrib++ = GLX_RGBA;
 604         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 605         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 606         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 607         *attrib++ = GLX_DOUBLEBUFFER;
 608         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 609         // if stencil is enabled, ask for alpha too
 610         if (stencil)
 611         {
 612                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 613                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
 614         }
 615         if (stereobuffer)
 616                 *attrib++ = GLX_STEREO;
 617         *attrib++ = None;
 618 }
 619
 620 int VID_InitMode(int fullscreen, int width, int height, int bpp, int refreshrate, int stereobuffer)
 621 {
 622         int i;
 623         int attrib[32];
 624         XSetWindowAttributes attr;
 625         unsigned long mask;
 626         Window root;
 627         XVisualInfo *visinfo;
 628         int MajorVersion, MinorVersion;
 629         const char *drivername;
 630
 631 #if defined(__APPLE__) && defined(__MACH__)
 632         drivername = "/usr/X11R6/lib/libGL.1.dylib";
 633 #else
 634         drivername = "libGL.so.1";
 635 #endif
 636 // 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
 637 // 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
 638 // LordHavoc: although this works on MacOSX, it's useless there (as there is only one system libGL)
 639         i = COM_CheckParm("-gl_driver");
 640         if (i && i < com_argc - 1)
 641                 drivername = com_argv[i + 1];
 642         if (!GL_OpenLibrary(drivername))
 643         {
 644                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 645                 return false;
 646         }
 647
 648         if (!(vidx11_display = XOpenDisplay(NULL)))
 649         {
 650                 Con_Print("Couldn't open the X display\n");
 651                 return false;
 652         }
 653
 654         vidx11_screen = DefaultScreen(vidx11_display);
 655         root = RootWindow(vidx11_display, vidx11_screen);
 656
 657         // Get video mode list
 658         MajorVersion = MinorVersion = 0;
 659         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 660                 vidmode_ext = false;
 661         else
 662         {
 663                 Con_DPrintf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 664                 vidmode_ext = true;
 665         }
 666
 667         if ((qglXChooseVisual = (XVisualInfo *(GLAPIENTRY *)(Display *dpy, int screen, int *attribList))GL_GetProcAddress("glXChooseVisual")) == NULL
 668          || (qglXCreateContext = (GLXContext (GLAPIENTRY *)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct))GL_GetProcAddress("glXCreateContext")) == NULL
 669          || (qglXDestroyContext = (void (GLAPIENTRY *)(Display *dpy, GLXContext ctx))GL_GetProcAddress("glXDestroyContext")) == NULL
 670          || (qglXMakeCurrent = (Bool (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable, GLXContext ctx))GL_GetProcAddress("glXMakeCurrent")) == NULL
 671          || (qglXSwapBuffers = (void (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable))GL_GetProcAddress("glXSwapBuffers")) == NULL
 672          || (qglXQueryExtensionsString = (const char *(GLAPIENTRY *)(Display *dpy, int screen))GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 673         {
 674                 Con_Printf("glX functions not found in %s\n", gl_driver);
 675                 return false;
 676         }
 677
 678         VID_BuildGLXAttrib(attrib, bpp == 32, stereobuffer);
 679         visinfo = qglXChooseVisual(vidx11_display, vidx11_screen, attrib);
 680         if (!visinfo)
 681         {
 682                 Con_Print("Couldn't get an RGB, Double-buffered, Depth visual\n");
 683                 return false;
 684         }
 685
 686         if (vidmode_ext)
 687         {
 688                 int best_fit, best_dist, dist, x, y;
 689
 690                 // Are we going fullscreen?  If so, let's change video mode
 691                 if (fullscreen)
 692                 {
 693                         XF86VidModeModeLine *current_vidmode;
 694                         XF86VidModeModeInfo **vidmodes;
 695                         int num_vidmodes;
 696
 697                         // This nice hack comes from the SDL source code
 698                         current_vidmode = (XF86VidModeModeLine*)((char*)&init_vidmode + sizeof(init_vidmode.dotclock));
 699                         XF86VidModeGetModeLine(vidx11_display, vidx11_screen, (int*)&init_vidmode.dotclock, current_vidmode);
 700
 701                         XF86VidModeGetAllModeLines(vidx11_display, vidx11_screen, &num_vidmodes, &vidmodes);
 702                         best_dist = 9999999;
 703                         best_fit = -1;
 704
 705                         for (i = 0; i < num_vidmodes; i++)
 706                         {
 707                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
 708                                         continue;
 709
 710                                 x = width - vidmodes[i]->hdisplay;
 711                                 y = height - vidmodes[i]->vdisplay;
 712                                 dist = (x * x) + (y * y);
 713                                 if (dist < best_dist)
 714                                 {
 715                                         best_dist = dist;
 716                                         best_fit = i;
 717                                 }
 718                         }
 719
 720                         if (best_fit != -1)
 721                         {
 722                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
 723                                 // to width/height =, so the window will take the full area of
 724                                 // the mode chosen
 725                                 width = vidmodes[best_fit]->hdisplay;
 726                                 height = vidmodes[best_fit]->vdisplay;
 727
 728                                 // change to the mode
 729                                 XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[best_fit]);
 730                                 vid_isfullscreen = true;
 731
 732                                 // Move the viewport to top left
 733                                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 734                         }
 735                         else
 736                                 fullscreen = 0;
 737
 738                         free(vidmodes);
 739                 }
 740         }
 741
 742         // LordHavoc: save the visual for use in gamma ramp settings later
 743         vidx11_visual = visinfo->visual;
 744
 745         /* window attributes */
 746         attr.background_pixel = 0;
 747         attr.border_pixel = 0;
 748         // LordHavoc: save the colormap for later, too
 749         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 750         attr.event_mask = X_MASK;
 751         if (vid_isfullscreen)
 752         {
 753                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 754                 attr.override_redirect = True;
 755                 attr.backing_store = NotUseful;
 756                 attr.save_under = False;
 757         }
 758         else
 759                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 760
 761         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 762         XStoreName(vidx11_display, win, gamename);
 763         XMapWindow(vidx11_display, win);
 764
 765         // LordHavoc: making the close button on a window do the right thing
 766         // seems to involve this mess, sigh...
 767         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 768         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 769
 770         if (vid_isfullscreen)
 771         {
 772                 XMoveWindow(vidx11_display, win, 0, 0);
 773                 XRaiseWindow(vidx11_display, win);
 774                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 775                 XFlush(vidx11_display);
 776                 // Move the viewport to top left
 777                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 778         }
 779
 780         //XSync(vidx11_display, False);
 781
 782         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 783         if (!ctx)
 784         {
 785                 Con_Printf ("glXCreateContext failed\n");
 786                 return false;
 787         }
 788
 789         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 790         {
 791                 Con_Printf ("glXMakeCurrent failed\n");
 792                 return false;
 793         }
 794
 795         XSync(vidx11_display, False);
 796
 797         if ((qglGetString = (const GLubyte* (GLAPIENTRY *)(GLenum name))GL_GetProcAddress("glGetString")) == NULL)
 798         {
 799                 Con_Printf ("glGetString not found in %s\n", gl_driver);
 800                 return false;
 801         }
 802
 803         gl_renderer = (const char *)qglGetString(GL_RENDERER);
 804         gl_vendor = (const char *)qglGetString(GL_VENDOR);
 805         gl_version = (const char *)qglGetString(GL_VERSION);
 806         gl_extensions = (const char *)qglGetString(GL_EXTENSIONS);
 807         gl_platform = "GLX";
 808         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, vidx11_screen);
 809
 810         gl_videosyncavailable = false;
 811
 812 // COMMANDLINEOPTION: Linux GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 813 // COMMANDLINEOPTION: BSD GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 814 // COMMANDLINEOPTION: MacOSX GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 815         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 816 // COMMANDLINEOPTION: Linux GLX: -novideosync disables GLX_SGI_swap_control
 817 // COMMANDLINEOPTION: BSD GLX: -novideosync disables GLX_SGI_swap_control
 818 // COMMANDLINEOPTION: MacOSX GLX: -novideosync disables GLX_SGI_swap_control
 819         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_swap_control", swapcontrolfuncs, "-novideosync", false);
 820
 821         vid_usingmouse = false;
 822         vid_usingvsync = false;
 823         vid_hidden = false;
 824         vid_activewindow = true;
 825         vid_x11_hardwaregammasupported = XF86VidModeGetGammaRampSize(vidx11_display, vidx11_screen, &vid_x11_gammarampsize) != 0;
 826 #if !defined(__APPLE__) && !defined(SUNOS)
 827         vid_x11_dgasupported = XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion);
 828         if (!vid_x11_dgasupported)
 829                 Con_Print( "Failed to detect XF86DGA Mouse extension\n" );
 830 #endif
 831         GL_Init();
 832         return true;
 833 }
 834
 835 void Sys_SendKeyEvents(void)
 836 {
 837         static qboolean sound_active = true;
 838
 839         // enable/disable sound on focus gain/loss
 840         if (!vid_hidden && (vid_activewindow || !snd_mutewhenidle.integer))
 841         {
 842                 if (!sound_active)
 843                 {
 844                         S_UnblockSound ();
 845                         sound_active = true;
 846                 }
 847         }
 848         else
 849         {
 850                 if (sound_active)
 851                 {
 852                         S_BlockSound ();
 853                         sound_active = false;
 854                 }
 855         }
 856
 857         HandleEvents();
 858 }
 859
 860 void IN_Move (void)
 861 {
 862         if (mouse_avail)
 863         {
 864                 in_mouse_x = mouse_x;
 865                 in_mouse_y = mouse_y;
 866         }
 867         mouse_x = 0;
 868         mouse_y = 0;
 869 }