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 #include <X11/xpm.h>
  31
  32 #include <X11/extensions/XShm.h>
  33 #if !defined(__APPLE__) && !defined(__MACH__) && !defined(SUNOS)
  34 #include <X11/extensions/xf86dga.h>
  35 #endif
  36 #include <X11/extensions/xf86vmode.h>
  37
  38 #include "quakedef.h"
  39
  40 #include "nexuiz.xpm"
  41 #include "darkplaces.xpm"
  42
  43 // Tell startup code that we have a client
  44 int cl_available = true;
  45
  46 // note: if we used the XRandR extension we could support refresh rates
  47 qboolean vid_supportrefreshrate = false;
  48
  49 //GLX prototypes
  50 XVisualInfo *(GLAPIENTRY *qglXChooseVisual)(Display *dpy, int screen, int *attribList);
  51 GLXContext (GLAPIENTRY *qglXCreateContext)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct);
  52 void (GLAPIENTRY *qglXDestroyContext)(Display *dpy, GLXContext ctx);
  53 Bool (GLAPIENTRY *qglXMakeCurrent)(Display *dpy, GLXDrawable drawable, GLXContext ctx);
  54 void (GLAPIENTRY *qglXSwapBuffers)(Display *dpy, GLXDrawable drawable);
  55 const char *(GLAPIENTRY *qglXQueryExtensionsString)(Display *dpy, int screen);
  56
  57 //GLX_ARB_get_proc_address
  58 void *(GLAPIENTRY *qglXGetProcAddressARB)(const GLubyte *procName);
  59
  60 static dllfunction_t getprocaddressfuncs[] =
  61 {
  62         {"glXGetProcAddressARB", (void **) &qglXGetProcAddressARB},
  63         {NULL, NULL}
  64 };
  65
  66 //GLX_SGI_swap_control
  67 GLint (GLAPIENTRY *qglXSwapIntervalSGI)(GLint interval);
  68
  69 static dllfunction_t swapcontrolfuncs[] =
  70 {
  71         {"glXSwapIntervalSGI", (void **) &qglXSwapIntervalSGI},
  72         {NULL, NULL}
  73 };
  74
  75 static Display *vidx11_display = NULL;
  76 static int vidx11_screen;
  77 static Window win;
  78 static GLXContext ctx = NULL;
  79
  80 Atom wm_delete_window_atom;
  81
  82 #define KEY_MASK (KeyPressMask | KeyReleaseMask)
  83 #define MOUSE_MASK (ButtonPressMask | ButtonReleaseMask | \
  84                     PointerMotionMask | ButtonMotionMask)
  85 #define X_MASK (KEY_MASK | MOUSE_MASK | VisibilityChangeMask | \
  86                 StructureNotifyMask | FocusChangeMask | EnterWindowMask | \
  87                 LeaveWindowMask)
  88
  89
  90 static qboolean mouse_avail = true;
  91 static qboolean vid_usingmouse = false;
  92 static qboolean vid_usingvsync = false;
  93 static qboolean vid_usevsync = false;
  94 static qboolean vid_x11_hardwaregammasupported = false;
  95 static qboolean vid_x11_dgasupported = false;
  96 static int vid_x11_gammarampsize = 0;
  97 static float    mouse_x, mouse_y;
  98 static int p_mouse_x, p_mouse_y;
  99
 100 #if !defined(__APPLE__) && !defined(SUNOS)
 101 cvar_t vid_dgamouse = {CVAR_SAVE, "vid_dgamouse", "1", "make use of DGA mouse input"};
 102 #endif
 103
 104 qboolean vidmode_ext = false;
 105
 106 static int win_x, win_y;
 107
 108 static XF86VidModeModeInfo init_vidmode;
 109 static qboolean vid_isfullscreen = false;
 110
 111 static Visual *vidx11_visual;
 112 static Colormap vidx11_colormap;
 113
 114 /*-----------------------------------------------------------------------*/
 115
 116 static int XLateKey(XKeyEvent *ev, char *ascii)
 117 {
 118         int key = 0;
 119         char buf[64];
 120         KeySym keysym, shifted;
 121
 122         keysym = XLookupKeysym (ev, 0);
 123         XLookupString(ev, buf, sizeof buf, &shifted, 0);
 124         *ascii = buf[0];
 125
 126         switch(keysym)
 127         {
 128                 case XK_KP_Page_Up:      key = K_KP_PGUP; break;
 129                 case XK_Page_Up:         key = K_PGUP; break;
 130
 131                 case XK_KP_Page_Down: key = K_KP_PGDN; break;
 132                 case XK_Page_Down:       key = K_PGDN; break;
 133
 134                 case XK_KP_Home: key = K_KP_HOME; break;
 135                 case XK_Home:    key = K_HOME; break;
 136
 137                 case XK_KP_End:  key = K_KP_END; break;
 138                 case XK_End:     key = K_END; break;
 139
 140                 case XK_KP_Left: key = K_KP_LEFTARROW; break;
 141                 case XK_Left:    key = K_LEFTARROW; break;
 142
 143                 case XK_KP_Right: key = K_KP_RIGHTARROW; break;
 144                 case XK_Right:  key = K_RIGHTARROW;             break;
 145
 146                 case XK_KP_Down: key = K_KP_DOWNARROW; break;
 147                 case XK_Down:    key = K_DOWNARROW; break;
 148
 149                 case XK_KP_Up:   key = K_KP_UPARROW; break;
 150                 case XK_Up:              key = K_UPARROW;        break;
 151
 152                 case XK_Escape: key = K_ESCAPE;         break;
 153
 154                 case XK_KP_Enter: key = K_KP_ENTER;     break;
 155                 case XK_Return: key = K_ENTER;           break;
 156
 157                 case XK_Tab:            key = K_TAB;                     break;
 158
 159                 case XK_F1:              key = K_F1;                            break;
 160
 161                 case XK_F2:              key = K_F2;                            break;
 162
 163                 case XK_F3:              key = K_F3;                            break;
 164
 165                 case XK_F4:              key = K_F4;                            break;
 166
 167                 case XK_F5:              key = K_F5;                            break;
 168
 169                 case XK_F6:              key = K_F6;                            break;
 170
 171                 case XK_F7:              key = K_F7;                            break;
 172
 173                 case XK_F8:              key = K_F8;                            break;
 174
 175                 case XK_F9:              key = K_F9;                            break;
 176
 177                 case XK_F10:            key = K_F10;                     break;
 178
 179                 case XK_F11:            key = K_F11;                     break;
 180
 181                 case XK_F12:            key = K_F12;                     break;
 182
 183                 case XK_BackSpace: key = K_BACKSPACE; break;
 184
 185                 case XK_KP_Delete: key = K_KP_DEL; break;
 186                 case XK_Delete: key = K_DEL; break;
 187
 188                 case XK_Pause:  key = K_PAUSE;           break;
 189
 190                 case XK_Shift_L:
 191                 case XK_Shift_R:        key = K_SHIFT;          break;
 192
 193                 case XK_Execute:
 194                 case XK_Control_L:
 195                 case XK_Control_R:      key = K_CTRL;            break;
 196
 197                 case XK_Alt_L:
 198                 case XK_Meta_L:
 199                 case XK_ISO_Level3_Shift:
 200                 case XK_Alt_R:
 201                 case XK_Meta_R: key = K_ALT;                    break;
 202
 203                 case XK_KP_Begin: key = K_KP_5; break;
 204
 205                 case XK_Insert:key = K_INS; break;
 206                 case XK_KP_Insert: key = K_KP_INS; break;
 207
 208                 case XK_KP_Multiply: key = K_KP_MULTIPLY; break;
 209                 case XK_KP_Add:  key = K_KP_PLUS; break;
 210                 case XK_KP_Subtract: key = K_KP_MINUS; break;
 211                 case XK_KP_Divide: key = K_KP_SLASH; break;
 212
 213                 case XK_section:        key = '~'; break;
 214
 215                 default:
 216                         if (keysym < 32)
 217                                 break;
 218
 219                         if (keysym >= 'A' && keysym <= 'Z')
 220                                 key = keysym - 'A' + 'a';
 221                         else
 222                                 key = keysym;
 223
 224                         break;
 225         }
 226
 227         return key;
 228 }
 229
 230 static Cursor CreateNullCursor(Display *display, Window root)
 231 {
 232         Pixmap cursormask;
 233         XGCValues xgc;
 234         GC gc;
 235         XColor dummycolour;
 236         Cursor cursor;
 237
 238         cursormask = XCreatePixmap(display, root, 1, 1, 1);
 239         xgc.function = GXclear;
 240         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
 241         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
 242         dummycolour.pixel = 0;
 243         dummycolour.red = 0;
 244         dummycolour.flags = 04;
 245         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
 246         XFreePixmap(display,cursormask);
 247         XFreeGC(display,gc);
 248         return cursor;
 249 }
 250
 251 static void IN_Activate (qboolean grab)
 252 {
 253         if (!vidx11_display)
 254                 return;
 255         if (grab)
 256         {
 257                 if (!vid_usingmouse && mouse_avail && win)
 258                 {
 259                         XWindowAttributes attribs_1;
 260                         XSetWindowAttributes attribs_2;
 261
 262                         XGetWindowAttributes(vidx11_display, win, &attribs_1);
 263                         attribs_2.event_mask = attribs_1.your_event_mask | KEY_MASK | MOUSE_MASK;
 264                         XChangeWindowAttributes(vidx11_display, win, CWEventMask, &attribs_2);
 265
 266                 // inviso cursor
 267                         XDefineCursor(vidx11_display, win, CreateNullCursor(vidx11_display, win));
 268
 269                         XGrabPointer(vidx11_display, win,  True, 0, GrabModeAsync, GrabModeAsync, win, None, CurrentTime);
 270
 271 #if !defined(__APPLE__) && !defined(SUNOS)
 272                         if (vid_dgamouse.integer && vid_x11_dgasupported)
 273                         {
 274                                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
 275                                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 276                         }
 277                         else
 278 #endif
 279                                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, vid.width / 2, vid.height / 2);
 280
 281                         if (vid_grabkeyboard.integer || vid_isfullscreen)
 282                                 XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
 283
 284                         mouse_x = mouse_y = 0;
 285                         cl_ignoremousemove = true;
 286                         vid_usingmouse = true;
 287                 }
 288         }
 289         else
 290         {
 291                 if (vid_usingmouse)
 292                 {
 293 #if !defined(__APPLE__) && !defined(SUNOS)
 294                         if (vid_x11_dgasupported)
 295                                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
 296 #endif
 297
 298                         XUngrabPointer(vidx11_display, CurrentTime);
 299                         XUngrabKeyboard(vidx11_display, CurrentTime);
 300
 301                         // inviso cursor
 302                         if (win)
 303                                 XUndefineCursor(vidx11_display, win);
 304
 305                         cl_ignoremousemove = true;
 306                         vid_usingmouse = false;
 307                 }
 308         }
 309 }
 310
 311 static keynum_t buttonremap[18] =
 312 {
 313         K_MOUSE1,
 314         K_MOUSE3,
 315         K_MOUSE2,
 316         K_MWHEELUP,
 317         K_MWHEELDOWN,
 318         K_MOUSE4,
 319         K_MOUSE5,
 320         K_MOUSE6,
 321         K_MOUSE7,
 322         K_MOUSE8,
 323         K_MOUSE9,
 324         K_MOUSE10,
 325         K_MOUSE11,
 326         K_MOUSE12,
 327         K_MOUSE13,
 328         K_MOUSE14,
 329         K_MOUSE15,
 330         K_MOUSE16,
 331 };
 332
 333 static void HandleEvents(void)
 334 {
 335         XEvent event;
 336         int key;
 337         char ascii;
 338         qboolean dowarp = false;
 339
 340         if (!vidx11_display)
 341                 return;
 342
 343         while (XPending(vidx11_display))
 344         {
 345                 XNextEvent(vidx11_display, &event);
 346
 347                 switch (event.type)
 348                 {
 349                 case KeyPress:
 350                         // key pressed
 351                         key = XLateKey (&event.xkey, &ascii);
 352                         Key_Event(key, ascii, true);
 353                         break;
 354
 355                 case KeyRelease:
 356                         // key released
 357                         key = XLateKey (&event.xkey, &ascii);
 358                         Key_Event(key, ascii, false);
 359                         break;
 360
 361                 case MotionNotify:
 362                         // mouse moved
 363                         if (vid_usingmouse)
 364                         {
 365 #if !defined(__APPLE__) && !defined(SUNOS)
 366                                 if (vid_dgamouse.integer == 1 && vid_x11_dgasupported)
 367                                 {
 368                                         mouse_x += event.xmotion.x_root;
 369                                         mouse_y += event.xmotion.y_root;
 370                                 }
 371                                 else
 372 #endif
 373                                 {
 374
 375                                         if (!event.xmotion.send_event)
 376                                         {
 377                                                 mouse_x += event.xmotion.x - p_mouse_x;
 378                                                 mouse_y += event.xmotion.y - p_mouse_y;
 379                                                 if (abs(vid.width/2 - event.xmotion.x) > vid.width / 4 || abs(vid.height/2 - event.xmotion.y) > vid.height / 4)
 380                                                         dowarp = true;
 381                                         }
 382                                         p_mouse_x = event.xmotion.x;
 383                                         p_mouse_y = event.xmotion.y;
 384                                 }
 385                         }
 386                         //else
 387                         //      ui_mouseupdate(event.xmotion.x, event.xmotion.y);
 388                         break;
 389
 390                 case ButtonPress:
 391                         // mouse button pressed
 392                         if (event.xbutton.button <= 18)
 393                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, true);
 394                         else
 395                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-18 expected\n", event.xbutton.button);
 396                         break;
 397
 398                 case ButtonRelease:
 399                         // mouse button released
 400                         if (event.xbutton.button <= 18)
 401                                 Key_Event(buttonremap[event.xbutton.button - 1], 0, false);
 402                         else
 403                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-18 expected\n", event.xbutton.button);
 404                         break;
 405
 406                 case CreateNotify:
 407                         // window created
 408                         win_x = event.xcreatewindow.x;
 409                         win_y = event.xcreatewindow.y;
 410                         break;
 411
 412                 case ConfigureNotify:
 413                         // window changed size/location
 414                         win_x = event.xconfigure.x;
 415                         win_y = event.xconfigure.y;
 416                         break;
 417                 case DestroyNotify:
 418                         // window has been destroyed
 419                         Sys_Quit(0);
 420                         break;
 421                 case ClientMessage:
 422                         // window manager messages
 423                         if ((event.xclient.format == 32) && ((unsigned int)event.xclient.data.l[0] == wm_delete_window_atom))
 424                                 Sys_Quit(0);
 425                         break;
 426                 case MapNotify:
 427                         // window restored
 428                         vid_hidden = false;
 429                         VID_RestoreSystemGamma();
 430                         break;
 431                 case UnmapNotify:
 432                         // window iconified/rolledup/whatever
 433                         vid_hidden = true;
 434                         VID_RestoreSystemGamma();
 435                         break;
 436                 case FocusIn:
 437                         // window is now the input focus
 438                         vid_activewindow = true;
 439                         break;
 440                 case FocusOut:
 441                         // window is no longer the input focus
 442                         vid_activewindow = false;
 443                         VID_RestoreSystemGamma();
 444                         break;
 445                 case EnterNotify:
 446                         // mouse entered window
 447                         break;
 448                 case LeaveNotify:
 449                         // mouse left window
 450                         break;
 451                 }
 452         }
 453
 454         if (dowarp)
 455         {
 456                 /* move the mouse to the window center again */
 457                 p_mouse_x = vid.width / 2;
 458                 p_mouse_y = vid.height / 2;
 459                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
 460         }
 461 }
 462
 463 static void *prjobj = NULL;
 464
 465 static void GL_CloseLibrary(void)
 466 {
 467         if (prjobj)
 468                 dlclose(prjobj);
 469         prjobj = NULL;
 470         gl_driver[0] = 0;
 471         qglXGetProcAddressARB = NULL;
 472         gl_extensions = "";
 473         gl_platform = "";
 474         gl_platformextensions = "";
 475 }
 476
 477 static int GL_OpenLibrary(const char *name)
 478 {
 479         Con_Printf("Loading OpenGL driver %s\n", name);
 480         GL_CloseLibrary();
 481         if (!(prjobj = dlopen(name, RTLD_LAZY | RTLD_GLOBAL)))
 482         {
 483                 Con_Printf("Unable to open symbol list for %s\n", name);
 484                 return false;
 485         }
 486         strlcpy(gl_driver, name, sizeof(gl_driver));
 487         return true;
 488 }
 489
 490 void *GL_GetProcAddress(const char *name)
 491 {
 492         void *p = NULL;
 493         if (qglXGetProcAddressARB != NULL)
 494                 p = (void *) qglXGetProcAddressARB((GLubyte *)name);
 495         if (p == NULL)
 496                 p = (void *) dlsym(prjobj, name);
 497         return p;
 498 }
 499
 500 void VID_Shutdown(void)
 501 {
 502         if (!ctx || !vidx11_display)
 503                 return;
 504
 505         if (vidx11_display)
 506         {
 507                 IN_Activate(false);
 508                 VID_RestoreSystemGamma();
 509
 510                 // FIXME: glXDestroyContext here?
 511                 if (vid_isfullscreen)
 512                         XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, &init_vidmode);
 513                 if (win)
 514                         XDestroyWindow(vidx11_display, win);
 515                 XCloseDisplay(vidx11_display);
 516         }
 517         vid_hidden = true;
 518         vid_isfullscreen = false;
 519         vidx11_display = NULL;
 520         win = 0;
 521         ctx = NULL;
 522
 523         GL_CloseLibrary();
 524         Key_ClearStates ();
 525 }
 526
 527 void signal_handler(int sig)
 528 {
 529         Con_Printf("Received signal %d, exiting...\n", sig);
 530         VID_RestoreSystemGamma();
 531         Sys_Quit(1);
 532 }
 533
 534 void InitSig(void)
 535 {
 536         signal(SIGHUP, signal_handler);
 537         signal(SIGINT, signal_handler);
 538         signal(SIGQUIT, signal_handler);
 539         signal(SIGILL, signal_handler);
 540         signal(SIGTRAP, signal_handler);
 541         signal(SIGIOT, signal_handler);
 542         signal(SIGBUS, signal_handler);
 543         signal(SIGFPE, signal_handler);
 544         signal(SIGSEGV, signal_handler);
 545         signal(SIGTERM, signal_handler);
 546 }
 547
 548 void VID_Finish (qboolean allowmousegrab)
 549 {
 550         qboolean vid_usemouse;
 551
 552         vid_usevsync = vid_vsync.integer && !cls.timedemo && gl_videosyncavailable;
 553         if (vid_usingvsync != vid_usevsync && gl_videosyncavailable)
 554         {
 555                 vid_usingvsync = vid_usevsync;
 556                 if (qglXSwapIntervalSGI (vid_usevsync))
 557                         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");
 558         }
 559
 560         // handle the mouse state when windowed if that's changed
 561         vid_usemouse = false;
 562         if (allowmousegrab && vid_mouse.integer && !key_consoleactive && (key_dest != key_game || !cls.demoplayback))
 563                 vid_usemouse = true;
 564         if (!vid_activewindow)
 565                 vid_usemouse = false;
 566         if (vid_isfullscreen)
 567                 vid_usemouse = true;
 568         IN_Activate(vid_usemouse);
 569
 570         if (r_render.integer)
 571         {
 572                 CHECKGLERROR
 573                 if (r_speeds.integer || gl_finish.integer)
 574                 {
 575                         qglFinish();CHECKGLERROR
 576                 }
 577                 qglXSwapBuffers(vidx11_display, win);CHECKGLERROR
 578         }
 579
 580         if (vid_x11_hardwaregammasupported)
 581                 VID_UpdateGamma(false, vid_x11_gammarampsize);
 582 }
 583
 584 int VID_SetGamma(unsigned short *ramps, int rampsize)
 585 {
 586         return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, rampsize, ramps, ramps + rampsize, ramps + rampsize*2);
 587 }
 588
 589 int VID_GetGamma(unsigned short *ramps, int rampsize)
 590 {
 591         return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, rampsize, ramps, ramps + rampsize, ramps + rampsize*2);
 592 }
 593
 594 void VID_Init(void)
 595 {
 596 #if !defined(__APPLE__) && !defined(SUNOS)
 597         Cvar_RegisterVariable (&vid_dgamouse);
 598 #endif
 599         InitSig(); // trap evil signals
 600 // COMMANDLINEOPTION: Input: -nomouse disables mouse support (see also vid_mouse cvar)
 601         if (COM_CheckParm ("-nomouse"))
 602                 mouse_avail = false;
 603 }
 604
 605 void VID_BuildGLXAttrib(int *attrib, qboolean stencil, qboolean stereobuffer)
 606 {
 607         *attrib++ = GLX_RGBA;
 608         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
 609         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
 610         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
 611         *attrib++ = GLX_DOUBLEBUFFER;
 612         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
 613         // if stencil is enabled, ask for alpha too
 614         if (stencil)
 615         {
 616                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
 617                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
 618         }
 619         if (stereobuffer)
 620                 *attrib++ = GLX_STEREO;
 621         *attrib++ = None;
 622 }
 623
 624 int VID_InitMode(int fullscreen, int width, int height, int bpp, int refreshrate, int stereobuffer)
 625 {
 626         int i;
 627         int attrib[32];
 628         XSetWindowAttributes attr;
 629         XClassHint *clshints;
 630         XWMHints wmhints;
 631         unsigned long mask;
 632         Window root;
 633         XVisualInfo *visinfo;
 634         int MajorVersion, MinorVersion;
 635         const char *drivername;
 636
 637 #if defined(__APPLE__) && defined(__MACH__)
 638         drivername = "/usr/X11R6/lib/libGL.1.dylib";
 639 #else
 640         drivername = "libGL.so.1";
 641 #endif
 642 // 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
 643 // 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
 644 // LordHavoc: although this works on MacOSX, it's useless there (as there is only one system libGL)
 645         i = COM_CheckParm("-gl_driver");
 646         if (i && i < com_argc - 1)
 647                 drivername = com_argv[i + 1];
 648         if (!GL_OpenLibrary(drivername))
 649         {
 650                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
 651                 return false;
 652         }
 653
 654         if (!(vidx11_display = XOpenDisplay(NULL)))
 655         {
 656                 Con_Print("Couldn't open the X display\n");
 657                 return false;
 658         }
 659
 660         vidx11_screen = DefaultScreen(vidx11_display);
 661         root = RootWindow(vidx11_display, vidx11_screen);
 662
 663         // Get video mode list
 664         MajorVersion = MinorVersion = 0;
 665         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
 666                 vidmode_ext = false;
 667         else
 668         {
 669                 Con_DPrintf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
 670                 vidmode_ext = true;
 671         }
 672
 673         if ((qglXChooseVisual = (XVisualInfo *(GLAPIENTRY *)(Display *dpy, int screen, int *attribList))GL_GetProcAddress("glXChooseVisual")) == NULL
 674          || (qglXCreateContext = (GLXContext (GLAPIENTRY *)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct))GL_GetProcAddress("glXCreateContext")) == NULL
 675          || (qglXDestroyContext = (void (GLAPIENTRY *)(Display *dpy, GLXContext ctx))GL_GetProcAddress("glXDestroyContext")) == NULL
 676          || (qglXMakeCurrent = (Bool (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable, GLXContext ctx))GL_GetProcAddress("glXMakeCurrent")) == NULL
 677          || (qglXSwapBuffers = (void (GLAPIENTRY *)(Display *dpy, GLXDrawable drawable))GL_GetProcAddress("glXSwapBuffers")) == NULL
 678          || (qglXQueryExtensionsString = (const char *(GLAPIENTRY *)(Display *dpy, int screen))GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
 679         {
 680                 Con_Printf("glX functions not found in %s\n", gl_driver);
 681                 return false;
 682         }
 683
 684         VID_BuildGLXAttrib(attrib, bpp == 32, stereobuffer);
 685         visinfo = qglXChooseVisual(vidx11_display, vidx11_screen, attrib);
 686         if (!visinfo)
 687         {
 688                 Con_Print("Couldn't get an RGB, Double-buffered, Depth visual\n");
 689                 return false;
 690         }
 691
 692         if (vidmode_ext)
 693         {
 694                 int best_fit, best_dist, dist, x, y;
 695
 696                 // Are we going fullscreen?  If so, let's change video mode
 697                 if (fullscreen)
 698                 {
 699                         XF86VidModeModeLine *current_vidmode;
 700                         XF86VidModeModeInfo **vidmodes;
 701                         int num_vidmodes;
 702
 703                         // This nice hack comes from the SDL source code
 704                         current_vidmode = (XF86VidModeModeLine*)((char*)&init_vidmode + sizeof(init_vidmode.dotclock));
 705                         XF86VidModeGetModeLine(vidx11_display, vidx11_screen, (int*)&init_vidmode.dotclock, current_vidmode);
 706
 707                         XF86VidModeGetAllModeLines(vidx11_display, vidx11_screen, &num_vidmodes, &vidmodes);
 708                         best_dist = 9999999;
 709                         best_fit = -1;
 710
 711                         for (i = 0; i < num_vidmodes; i++)
 712                         {
 713                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
 714                                         continue;
 715
 716                                 x = width - vidmodes[i]->hdisplay;
 717                                 y = height - vidmodes[i]->vdisplay;
 718                                 dist = (x * x) + (y * y);
 719                                 if (dist < best_dist)
 720                                 {
 721                                         best_dist = dist;
 722                                         best_fit = i;
 723                                 }
 724                         }
 725
 726                         if (best_fit != -1)
 727                         {
 728                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
 729                                 // to width/height =, so the window will take the full area of
 730                                 // the mode chosen
 731                                 width = vidmodes[best_fit]->hdisplay;
 732                                 height = vidmodes[best_fit]->vdisplay;
 733
 734                                 // change to the mode
 735                                 XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[best_fit]);
 736                                 vid_isfullscreen = true;
 737
 738                                 // Move the viewport to top left
 739                                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 740                         }
 741                         else
 742                                 fullscreen = 0;
 743
 744                         free(vidmodes);
 745                 }
 746         }
 747
 748         // LordHavoc: save the visual for use in gamma ramp settings later
 749         vidx11_visual = visinfo->visual;
 750
 751         /* window attributes */
 752         attr.background_pixel = 0;
 753         attr.border_pixel = 0;
 754         // LordHavoc: save the colormap for later, too
 755         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
 756         attr.event_mask = X_MASK;
 757         if (vid_isfullscreen)
 758         {
 759                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
 760                 attr.override_redirect = True;
 761                 attr.backing_store = NotUseful;
 762                 attr.save_under = False;
 763         }
 764         else
 765                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 766
 767         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
 768
 769         wmhints.flags = 0;
 770         if(XpmCreatePixmapFromData(vidx11_display, win,
 771                 (gamemode == GAME_NEXUIZ) ? nexuiz_xpm : darkplaces_xpm,
 772                 &wmhints.icon_pixmap, &wmhints.icon_mask, NULL) == XpmSuccess)
 773                 wmhints.flags |= IconPixmapHint | IconMaskHint;
 774
 775         clshints = XAllocClassHint();
 776         clshints->res_name = strdup(gamename);
 777         clshints->res_class = strdup("DarkPlaces");
 778
 779         XmbSetWMProperties(vidx11_display, win, gamename, gamename, (char **) com_argv, com_argc, NULL, &wmhints, clshints);
 780         //XStoreName(vidx11_display, win, gamename);
 781         XMapWindow(vidx11_display, win);
 782
 783         // LordHavoc: making the close button on a window do the right thing
 784         // seems to involve this mess, sigh...
 785         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
 786         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
 787
 788         if (vid_isfullscreen)
 789         {
 790                 XMoveWindow(vidx11_display, win, 0, 0);
 791                 XRaiseWindow(vidx11_display, win);
 792                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
 793                 XFlush(vidx11_display);
 794                 // Move the viewport to top left
 795                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
 796         }
 797
 798         //XSync(vidx11_display, False);
 799
 800         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
 801         if (!ctx)
 802         {
 803                 Con_Printf ("glXCreateContext failed\n");
 804                 return false;
 805         }
 806
 807         if (!qglXMakeCurrent(vidx11_display, win, ctx))
 808         {
 809                 Con_Printf ("glXMakeCurrent failed\n");
 810                 return false;
 811         }
 812
 813         XSync(vidx11_display, False);
 814
 815         if ((qglGetString = (const GLubyte* (GLAPIENTRY *)(GLenum name))GL_GetProcAddress("glGetString")) == NULL)
 816         {
 817                 Con_Printf ("glGetString not found in %s\n", gl_driver);
 818                 return false;
 819         }
 820
 821         gl_renderer = (const char *)qglGetString(GL_RENDERER);
 822         gl_vendor = (const char *)qglGetString(GL_VENDOR);
 823         gl_version = (const char *)qglGetString(GL_VERSION);
 824         gl_extensions = (const char *)qglGetString(GL_EXTENSIONS);
 825         gl_platform = "GLX";
 826         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, vidx11_screen);
 827
 828         gl_videosyncavailable = false;
 829
 830 // COMMANDLINEOPTION: Linux GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 831 // COMMANDLINEOPTION: BSD GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 832 // COMMANDLINEOPTION: MacOSX GLX: -nogetprocaddress disables GLX_ARB_get_proc_address (not required, more formal method of getting extension functions)
 833         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
 834 // COMMANDLINEOPTION: Linux GLX: -novideosync disables GLX_SGI_swap_control
 835 // COMMANDLINEOPTION: BSD GLX: -novideosync disables GLX_SGI_swap_control
 836 // COMMANDLINEOPTION: MacOSX GLX: -novideosync disables GLX_SGI_swap_control
 837         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_swap_control", swapcontrolfuncs, "-novideosync", false);
 838
 839         vid_usingmouse = false;
 840         vid_usingvsync = false;
 841         vid_hidden = false;
 842         vid_activewindow = true;
 843         vid_x11_hardwaregammasupported = XF86VidModeGetGammaRampSize(vidx11_display, vidx11_screen, &vid_x11_gammarampsize) != 0;
 844 #if !defined(__APPLE__) && !defined(SUNOS)
 845         vid_x11_dgasupported = XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion);
 846         if (!vid_x11_dgasupported)
 847                 Con_Print( "Failed to detect XF86DGA Mouse extension\n" );
 848 #endif
 849         GL_Init();
 850         return true;
 851 }
 852
 853 void Sys_SendKeyEvents(void)
 854 {
 855         static qboolean sound_active = true;
 856
 857         // enable/disable sound on focus gain/loss
 858         if (!vid_hidden && (vid_activewindow || !snd_mutewhenidle.integer))
 859         {
 860                 if (!sound_active)
 861                 {
 862                         S_UnblockSound ();
 863                         sound_active = true;
 864                 }
 865         }
 866         else
 867         {
 868                 if (sound_active)
 869                 {
 870                         S_BlockSound ();
 871                         sound_active = false;
 872                 }
 873         }
 874
 875         HandleEvents();
 876 }
 877
 878 void IN_Move (void)
 879 {
 880         if (mouse_avail)
 881         {
 882                 in_mouse_x = mouse_x;
 883                 in_mouse_y = mouse_y;
 884         }
 885         mouse_x = 0;
 886         mouse_y = 0;
 887 }