added -gl_driver commandline option, and cleaned up some glX init stuff a bit
[divverent/darkplaces.git] / vid_glx.c
1 /*
2 Copyright (C) 1996-1997 Id Software, Inc.
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12
13 See the GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18 */
19
20 //#include <termios.h>
21 //#include <sys/ioctl.h>
22 //#include <sys/stat.h>
23 //#include <sys/vt.h>
24 //#include <stdarg.h>
25 //#include <stdio.h>
26 #include <signal.h>
27
28 #include <dlfcn.h>
29
30 #include <X11/Xlib.h>
31 #include <X11/Xutil.h>
32 #include <GL/glx.h>
33
34 #include <X11/keysym.h>
35 #include <X11/cursorfont.h>
36
37 #include <X11/extensions/XShm.h>
38 #include <X11/extensions/xf86dga.h>
39 #include <X11/extensions/xf86vmode.h>
40
41 #include "quakedef.h"
42
43 int cl_available = true;
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 gl_extensionfunctionlist_t getprocaddressfuncs[] =
57 {
58         {"glXGetProcAddressARB", (void **) &qglXGetProcAddressARB},
59         {NULL, NULL}
60 };
61
62 //GLX_SGI_video_sync
63 GLint (GLAPIENTRY *qglXGetVideoSyncSGI)(GLuint *count);
64 GLint (GLAPIENTRY *qglXWaitVideoSyncSGI)(int divisor, int remainder, unsigned int *count);
65
66 static gl_extensionfunctionlist_t videosyncfuncs[] =
67 {
68         {"glXGetVideoSyncSGI", (void **) &qglXGetVideoSyncSGI},
69         {"glXWaitVideoSyncSGI", (void **) &qglXWaitVideoSyncSGI},
70         {NULL, NULL}
71 };
72
73 static Display *vidx11_display = NULL;
74 static int scrnum;
75 static Window win;
76 static GLXContext ctx = NULL;
77
78 Atom wm_delete_window_atom;
79
80 #define KEY_MASK (KeyPressMask | KeyReleaseMask)
81 #define MOUSE_MASK (ButtonPressMask | ButtonReleaseMask | \
82                     PointerMotionMask | ButtonMotionMask )
83 #define X_MASK (KEY_MASK | MOUSE_MASK | VisibilityChangeMask | StructureNotifyMask )
84
85
86 static qboolean         mouse_avail = true;
87 static qboolean         mouse_active = false, usingmouse = false;
88 static float    mouse_x, mouse_y;
89 static int p_mouse_x, p_mouse_y;
90
91 cvar_t vid_dga = {CVAR_SAVE, "vid_dga", "1"};
92 cvar_t vid_dga_mouseaccel = {0, "vid_dga_mouseaccel", "1"};
93
94 qboolean vidmode_ext = false;
95
96 static int win_x, win_y;
97
98 static int scr_width, scr_height;
99
100 static XF86VidModeModeInfo **vidmodes;
101 static int num_vidmodes;
102 static qboolean vidmode_active = false;
103
104 static Visual *vidx11_visual;
105 static Colormap vidx11_colormap;
106
107 /*-----------------------------------------------------------------------*/
108
109 static int
110 XLateKey(XKeyEvent *ev)
111 {
112         int key = 0;
113         KeySym keysym;
114
115         keysym = XLookupKeysym(ev, 0);
116
117         switch(keysym)
118         {
119                 case XK_KP_Page_Up:     key = KP_PGUP; break;
120                 case XK_Page_Up:        key = K_PGUP; break;
121
122                 case XK_KP_Page_Down:   key = KP_PGDN; break;
123                 case XK_Page_Down:      key = K_PGDN; break;
124
125                 case XK_KP_Home:        key = KP_HOME; break;
126                 case XK_Home:           key = K_HOME; break;
127
128                 case XK_KP_End:         key = KP_END; break;
129                 case XK_End:            key = K_END; break;
130
131                 case XK_KP_Left:        key = KP_LEFTARROW; break;
132                 case XK_Left:           key = K_LEFTARROW; break;
133
134                 case XK_KP_Right:       key = KP_RIGHTARROW; break;
135                 case XK_Right:          key = K_RIGHTARROW; break;
136
137                 case XK_KP_Down:        key = KP_DOWNARROW; break;
138                 case XK_Down:           key = K_DOWNARROW; break;
139
140                 case XK_KP_Up:          key = KP_UPARROW; break;
141                 case XK_Up:                     key = K_UPARROW; break;
142
143                 case XK_Escape:         key = K_ESCAPE; break;
144
145                 case XK_KP_Enter:       key = KP_ENTER; break;
146                 case XK_Return:         key = K_ENTER; break;
147
148                 case XK_Tab:            key = K_TAB; break;
149
150                 case XK_F1:                     key = K_F1; break;
151                 case XK_F2:                     key = K_F2; break;
152                 case XK_F3:                     key = K_F3; break;
153                 case XK_F4:                     key = K_F4; break;
154                 case XK_F5:                     key = K_F5; break;
155                 case XK_F6:                     key = K_F6; break;
156                 case XK_F7:                     key = K_F7; break;
157                 case XK_F8:                     key = K_F8; break;
158                 case XK_F9:                     key = K_F9; break;
159                 case XK_F10:            key = K_F10; break;
160                 case XK_F11:            key = K_F11; break;
161                 case XK_F12:            key = K_F12; break;
162
163                 case XK_BackSpace:      key = K_BACKSPACE; break;
164
165                 case XK_KP_Delete:      key = KP_DEL; break;
166                 case XK_Delete:         key = K_DEL; break;
167
168                 case XK_Pause:          key = K_PAUSE; break;
169
170                 case XK_Shift_L:
171                 case XK_Shift_R:        key = K_SHIFT; break;
172
173                 case XK_Execute:
174                 case XK_Control_L:
175                 case XK_Control_R:      key = K_CTRL; break;
176
177                 case XK_Mode_switch:
178                 case XK_Alt_L:
179                 case XK_Meta_L:
180                 case XK_Alt_R:
181                 case XK_Meta_R:         key = K_ALT; break;
182
183                 case XK_Caps_Lock:      key = K_CAPSLOCK; break;
184                 case XK_KP_Begin:       key = KP_5; break;
185
186                 case XK_Insert:         key = K_INS; break;
187                 case XK_KP_Insert:      key = KP_INS; break;
188
189                 case XK_KP_Multiply:    key = KP_MULTIPLY; break;
190                 case XK_KP_Add:         key = KP_PLUS; break;
191                 case XK_KP_Subtract:    key = KP_MINUS; break;
192                 case XK_KP_Divide:      key = KP_DIVIDE; break;
193
194                 /* For Sun keyboards */
195                 case XK_F27:            key = K_HOME; break;
196                 case XK_F29:            key = K_PGUP; break;
197                 case XK_F33:            key = K_END; break;
198                 case XK_F35:            key = K_PGDN; break;
199
200                 default:
201                         if (keysym < 128)
202                         {
203                                 /* ASCII keys */
204                                 key = keysym;
205                                 if ((key >= 'A') && (key <= 'Z'))
206                                         key = key + ('a' - 'A');
207                         }
208                         break;
209         }
210
211         return key;
212 }
213
214 static Cursor CreateNullCursor(Display *display, Window root)
215 {
216         Pixmap cursormask;
217         XGCValues xgc;
218         GC gc;
219         XColor dummycolour;
220         Cursor cursor;
221
222         cursormask = XCreatePixmap(display, root, 1, 1, 1);
223         xgc.function = GXclear;
224         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
225         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
226         dummycolour.pixel = 0;
227         dummycolour.red = 0;
228         dummycolour.flags = 04;
229         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
230         XFreePixmap(display,cursormask);
231         XFreeGC(display,gc);
232         return cursor;
233 }
234
235 static void install_grabs(void)
236 {
237         XWindowAttributes attribs_1;
238         XSetWindowAttributes attribs_2;
239
240         XGetWindowAttributes(vidx11_display, win, &attribs_1);
241         attribs_2.event_mask = attribs_1.your_event_mask | KEY_MASK | MOUSE_MASK;
242         XChangeWindowAttributes(vidx11_display, win, CWEventMask, &attribs_2);
243
244 // inviso cursor
245         XDefineCursor(vidx11_display, win, CreateNullCursor(vidx11_display, win));
246
247         XGrabPointer(vidx11_display, win,  True, 0, GrabModeAsync, GrabModeAsync, win, None, CurrentTime);
248
249         if (vid_dga.integer)
250         {
251                 int MajorVersion, MinorVersion;
252
253                 if (!XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
254                 {
255                         // unable to query, probalby not supported
256                         Con_Printf( "Failed to detect XF86DGA Mouse\n" );
257                         vid_dga.integer = 0;
258                 }
259                 else
260                 {
261                         vid_dga.integer = 1;
262                         XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
263                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
264                 }
265         }
266         else
267                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, scr_width / 2, scr_height / 2);
268
269         XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
270
271         mouse_active = true;
272         mouse_x = mouse_y = 0;
273 }
274
275 static void uninstall_grabs(void)
276 {
277         if (!vidx11_display || !win)
278                 return;
279
280         if (vid_dga.integer == 1)
281                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
282
283         XUngrabPointer(vidx11_display, CurrentTime);
284         XUngrabKeyboard(vidx11_display, CurrentTime);
285
286 // inviso cursor
287         XUndefineCursor(vidx11_display, win);
288
289         mouse_active = false;
290 }
291
292 static void HandleEvents(void)
293 {
294         XEvent event;
295         qboolean dowarp = false;
296
297         if (!vidx11_display)
298                 return;
299
300         while (XPending(vidx11_display))
301         {
302                 XNextEvent(vidx11_display, &event);
303
304                 switch (event.type)
305                 {
306                 case KeyPress:
307                         // key pressed
308                         Key_Event(XLateKey(&event.xkey), true);
309                         break;
310
311                 case KeyRelease:
312                         // key released
313                         Key_Event(XLateKey(&event.xkey), false);
314                         break;
315
316                 case MotionNotify:
317                         // mouse moved
318                         if (usingmouse)
319                         {
320                                 if (vid_dga.integer == 1)
321                                 {
322                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
323                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
324                                 }
325                                 else
326                                 {
327
328                                         if (!event.xmotion.send_event)
329                                         {
330                                                 mouse_x += event.xmotion.x - p_mouse_x;
331                                                 mouse_y += event.xmotion.y - p_mouse_y;
332                                                 if (abs(scr_width/2 - event.xmotion.x) > scr_width / 4 || abs(scr_height/2 - event.xmotion.y) > scr_height / 4)
333                                                         dowarp = true;
334                                         }
335                                         p_mouse_x = event.xmotion.x;
336                                         p_mouse_y = event.xmotion.y;
337                                 }
338                         }
339                         else
340                                 ui_mouseupdate(event.xmotion.x, event.xmotion.y);
341                         break;
342
343                 case ButtonPress:
344                         // mouse button pressed
345                         switch(event.xbutton.button)
346                         {
347                         case 1:
348                                 Key_Event(K_MOUSE1, true);
349                                 break;
350                         case 2:
351                                 Key_Event(K_MOUSE3, true);
352                                 break;
353                         case 3:
354                                 Key_Event(K_MOUSE2, true);
355                                 break;
356                         case 4:
357                                 Key_Event(K_MWHEELUP, true);
358                                 break;
359                         case 5:
360                                 Key_Event(K_MWHEELDOWN, true);
361                                 break;
362                 default:
363                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-5 expected\n", event.xbutton.button);
364                                 break;
365                         }
366                         break;
367
368                 case ButtonRelease:
369                         // mouse button released
370                         switch(event.xbutton.button)
371                         {
372                         case 1:
373                                 Key_Event(K_MOUSE1, false);
374                                 break;
375                         case 2:
376                                 Key_Event(K_MOUSE3, false);
377                                 break;
378                         case 3:
379                                 Key_Event(K_MOUSE2, false);
380                                 break;
381                         case 4:
382                                 Key_Event(K_MWHEELUP, false);
383                                 break;
384                         case 5:
385                                 Key_Event(K_MWHEELDOWN, false);
386                                 break;
387                 default:
388                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-5 expected\n", event.xbutton.button);
389                                 break;
390                         }
391                         break;
392
393                 case CreateNotify:
394                         // window created
395                         win_x = event.xcreatewindow.x;
396                         win_y = event.xcreatewindow.y;
397                         break;
398
399                 case ConfigureNotify:
400                         // window changed size/location
401                         win_x = event.xconfigure.x;
402                         win_y = event.xconfigure.y;
403                         break;
404                 case DestroyNotify:
405                         // window has been destroyed
406                         Sys_Quit();
407                         break;
408                 case ClientMessage:
409                         // window manager messages
410                         if ((event.xclient.format == 32) && (event.xclient.data.l[0] == wm_delete_window_atom))
411                                 Sys_Quit();
412                         break;
413                 case MapNotify:
414                         // window restored
415                         vid_hidden = false;
416                         break;
417                 case UnmapNotify:
418                         // window iconified/rolledup/whatever
419                         vid_hidden = true;
420                         break;
421                 case FocusIn:
422                         // window is now the input focus
423                         break;
424                 case FocusOut:
425                         // window is no longer the input focus
426                         break;
427                 case EnterNotify:
428                         // mouse entered window
429                         break;
430                 case LeaveNotify:
431                         // mouse left window
432                         break;
433                 }
434         }
435
436         if (dowarp)
437         {
438                 /* move the mouse to the window center again */
439                 p_mouse_x = scr_width / 2;
440                 p_mouse_y = scr_height / 2;
441                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
442         }
443
444 }
445
446 static void IN_DeactivateMouse( void )
447 {
448         if (!mouse_avail || !vidx11_display || !win)
449                 return;
450
451         if (mouse_active)
452         {
453                 uninstall_grabs();
454                 mouse_active = false;
455         }
456 }
457
458 static void IN_ActivateMouse( void )
459 {
460         if (!mouse_avail || !vidx11_display || !win)
461                 return;
462
463         if (!mouse_active)
464         {
465                 mouse_x = mouse_y = 0; // don't spazz
466                 install_grabs();
467                 mouse_active = true;
468         }
469 }
470
471
472 void VID_Shutdown(void)
473 {
474         if (!ctx || !vidx11_display)
475                 return;
476
477         vid_hidden = true;
478         usingmouse = false;
479         if (vidx11_display)
480         {
481                 uninstall_grabs();
482
483                 // FIXME: glXDestroyContext here?
484                 if (vidmode_active)
485                         XF86VidModeSwitchToMode(vidx11_display, scrnum, vidmodes[0]);
486                 if (win)
487                         XDestroyWindow(vidx11_display, win);
488                 XCloseDisplay(vidx11_display);
489         }
490         vidmode_active = false;
491         vidx11_display = NULL;
492         win = 0;
493         ctx = NULL;
494
495         GL_CloseLibrary();
496 }
497
498 void signal_handler(int sig)
499 {
500         printf("Received signal %d, exiting...\n", sig);
501         Sys_Quit();
502         exit(0);
503 }
504
505 void InitSig(void)
506 {
507         signal(SIGHUP, signal_handler);
508         signal(SIGINT, signal_handler);
509         signal(SIGQUIT, signal_handler);
510         signal(SIGILL, signal_handler);
511         signal(SIGTRAP, signal_handler);
512         signal(SIGIOT, signal_handler);
513         signal(SIGBUS, signal_handler);
514         signal(SIGFPE, signal_handler);
515         signal(SIGSEGV, signal_handler);
516         signal(SIGTERM, signal_handler);
517 }
518
519 /*
520 =================
521 VID_GetWindowSize
522 =================
523 */
524 void VID_GetWindowSize (int *x, int *y, int *width, int *height)
525 {
526         *x = *y = 0;
527         *width = scr_width;
528         *height = scr_height;
529 }
530
531 void VID_Finish (void)
532 {
533         int usemouse;
534         if (r_render.integer)
535         {
536                 qglFinish();
537                 qglXSwapBuffers(vidx11_display, win);
538         }
539
540 // handle the mouse state when windowed if that's changed
541         usemouse = false;
542         if (vid_mouse.integer && !key_consoleactive)
543                 usemouse = true;
544         if (vidmode_active)
545                 usemouse = true;
546         if (usemouse)
547         {
548                 if (!usingmouse)
549                 {
550                         usingmouse = true;
551                         IN_ActivateMouse ();
552                 }
553         }
554         else
555         {
556                 if (usingmouse)
557                 {
558                         usingmouse = false;
559                         IN_DeactivateMouse ();
560                 }
561         }
562 }
563
564 // LordHavoc: ported from SDL 1.2.2, this was far more difficult to port from
565 // SDL than to simply use the XFree gamma ramp extension, but that affects the
566 // whole screen even when the game window is inactive, this only affects the
567 // screen while the window is active, very desirable behavior :)
568 int VID_SetGamma(float prescale, float gamma, float scale, float base)
569 {
570 // LordHavoc: FIXME: finish this code, we need to allocate colors before we can store them
571 #if 1
572         return FALSE;
573 #else
574         int i, ncolors, c;
575         unsigned int Rmask, Gmask, Bmask, Rloss, Gloss, Bloss, Rshift, Gshift, Bshift, mask;
576         XColor xcmap[256];
577         unsigned short ramp[256];
578
579         if (COM_CheckParm("-nogamma"))
580                 return FALSE;
581
582         if (vidx11_visual->class != DirectColor)
583         {
584                 Con_Printf("X11 Visual class is %d, can only do gamma on %d\n", vidx11_visual->class, DirectColor);
585                 return FALSE;
586         }
587
588         Rmask = vidx11_visual->red_mask;
589         Gmask = vidx11_visual->green_mask;
590         Bmask = vidx11_visual->blue_mask;
591
592         Rshift = 0;
593         Rloss = 8;
594         if ((mask = Rmask))
595         {
596                 for (;!(mask & 1);mask >>= 1)
597                         ++Rshift;
598                 for (;(mask & 1);mask >>= 1)
599                         --Rloss;
600         }
601         Gshift = 0;
602         Gloss = 8;
603         if ((mask = Gmask))
604         {
605                 for (;!(mask & 1);mask >>= 1)
606                         ++Gshift;
607                 for (;(mask & 1);mask >>= 1)
608                         --Gloss;
609         }
610         Bshift = 0;
611         Bloss = 8;
612         if ((mask = Bmask))
613         {
614                 for (;!(mask & 1);mask >>= 1)
615                         ++Bshift;
616                 for (;(mask & 1);mask >>= 1)
617                         --Bloss;
618         }
619
620         BuildGammaTable16(prescale, gamma, scale, base, ramp);
621
622         // convert gamma ramp to palette (yes this seems odd)
623         ncolors = vidx11_visual->map_entries;
624         for (i = 0;i < ncolors;i++)
625         {
626                 c = (256 * i / ncolors);
627                 xcmap[i].pixel = ((c >> Rloss) << Rshift) | ((c >> Gloss) << Gshift) | ((c >> Bloss) << Bshift);
628                 xcmap[i].red   = ramp[c];
629                 xcmap[i].green = ramp[c];
630                 xcmap[i].blue  = ramp[c];
631                 xcmap[i].flags = (DoRed|DoGreen|DoBlue);
632         }
633         XStoreColors(vidx11_display, vidx11_colormap, xcmap, ncolors);
634         XSync(vidx11_display, false);
635         // FIXME: should this check for BadAccess/BadColor/BadValue errors produced by XStoreColors before setting this true?
636         return TRUE;
637 #endif
638 }
639
640 void VID_Init(void)
641 {
642         Cvar_RegisterVariable (&vid_dga);
643         Cvar_RegisterVariable (&vid_dga_mouseaccel);
644         InitSig(); // trap evil signals
645         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
646                 mouse_avail = false;
647 }
648
649 void VID_BuildGLXAttrib(int *attrib, int stencil, int gamma)
650 {
651         *attrib++ = GLX_RGBA;
652         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
653         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
654         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
655         *attrib++ = GLX_DOUBLEBUFFER;
656         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
657         if (stencil)
658         {
659                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
660         }
661         if (gamma)
662         {
663                 *attrib++ = GLX_X_VISUAL_TYPE;*attrib++ = GLX_DIRECT_COLOR;
664         };
665         *attrib++ = None;
666 }
667
668 int VID_InitMode(int fullscreen, int width, int height, int bpp, int stencil)
669 {
670         int i;
671         int attrib[32];
672         XSetWindowAttributes attr;
673         unsigned long mask;
674         Window root;
675         XVisualInfo *visinfo;
676         int MajorVersion, MinorVersion;
677         const char *drivername;
678
679         drivername = "libGL.so.1";
680         i = COM_CheckParm("-gl_driver");
681         if (i && i < com_argc - 1)
682                 drivername = com_argv[i + 1];
683         if (!GL_OpenLibrary(drivername))
684         {
685                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
686                 return false;
687         }
688
689         if (!(vidx11_display = XOpenDisplay(NULL)))
690         {
691                 Con_Printf("Couldn't open the X display\n");
692                 return false;
693         }
694
695         scrnum = DefaultScreen(vidx11_display);
696         root = RootWindow(vidx11_display, scrnum);
697
698         // Get video mode list
699         MajorVersion = MinorVersion = 0;
700         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
701                 vidmode_ext = false;
702         else
703         {
704                 Con_Printf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
705                 vidmode_ext = true;
706         }
707
708         if ((qglXChooseVisual = GL_GetProcAddress("glXChooseVisual")) == NULL
709          || (qglXCreateContext = GL_GetProcAddress("glXCreateContext")) == NULL
710          || (qglXMakeCurrent = GL_GetProcAddress("glXMakeCurrent")) == NULL
711          || (qglXSwapBuffers = GL_GetProcAddress("glXSwapBuffers")) == NULL
712          || (qglXQueryExtensionsString = GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
713         {
714                 Con_Printf("glX functions not found in %s\n", gl_driver);
715                 return false;
716         }
717
718         visinfo = NULL;
719 // LordHavoc: FIXME: finish this code, we need to allocate colors before we can store them
720 #if 0
721         if (!COM_CheckParm("-nogamma"))
722         {
723                 VID_BuildGLXAttrib(attrib, stencil, true);
724                 visinfo = qglXChooseVisual(vidx11_display, scrnum, attrib);
725         }
726 #endif
727         if (!visinfo)
728         {
729                 VID_BuildGLXAttrib(attrib, stencil, false);
730                 visinfo = qglXChooseVisual(vidx11_display, scrnum, attrib);
731                 if (!visinfo)
732                 {
733                         Con_Printf("Couldn't get an RGB, Double-buffered, Depth visual\n");
734                         return false;
735                 }
736         }
737
738         if (vidmode_ext)
739         {
740                 int best_fit, best_dist, dist, x, y;
741
742                 XF86VidModeGetAllModeLines(vidx11_display, scrnum, &num_vidmodes, &vidmodes);
743
744                 // Are we going fullscreen?  If so, let's change video mode
745                 if (fullscreen)
746                 {
747                         best_dist = 9999999;
748                         best_fit = -1;
749
750                         for (i = 0; i < num_vidmodes; i++)
751                         {
752                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
753                                         continue;
754
755                                 x = width - vidmodes[i]->hdisplay;
756                                 y = height - vidmodes[i]->vdisplay;
757                                 dist = (x * x) + (y * y);
758                                 if (dist < best_dist)
759                                 {
760                                         best_dist = dist;
761                                         best_fit = i;
762                                 }
763                         }
764
765                         if (best_fit != -1)
766                         {
767                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
768                                 // to width/height =, so the window will take the full area of
769                                 // the mode chosen
770                                 width = vidmodes[best_fit]->hdisplay;
771                                 height = vidmodes[best_fit]->vdisplay;
772
773                                 // change to the mode
774                                 XF86VidModeSwitchToMode(vidx11_display, scrnum, vidmodes[best_fit]);
775                                 vidmode_active = true;
776
777                                 // Move the viewport to top left
778                                 XF86VidModeSetViewPort(vidx11_display, scrnum, 0, 0);
779                         }
780                         else
781                                 fullscreen = 0;
782                 }
783         }
784
785         // LordHavoc: save the visual for use in gamma ramp settings later
786         vidx11_visual = visinfo->visual;
787
788         /* window attributes */
789         attr.background_pixel = 0;
790         attr.border_pixel = 0;
791         // LordHavoc: save the colormap for later, too
792         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
793         attr.event_mask = X_MASK;
794         if (vidmode_active)
795         {
796                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
797                 attr.override_redirect = True;
798                 attr.backing_store = NotUseful;
799                 attr.save_under = False;
800         }
801         else
802                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
803
804         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
805         XStoreName(vidx11_display, win, gamename);
806         XMapWindow(vidx11_display, win);
807
808         // LordHavoc: making the close button on a window do the right thing
809         // seems to involve this mess, sigh...
810         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
811         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
812
813         if (vidmode_active)
814         {
815                 XMoveWindow(vidx11_display, win, 0, 0);
816                 XRaiseWindow(vidx11_display, win);
817                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
818                 XFlush(vidx11_display);
819                 // Move the viewport to top left
820                 XF86VidModeSetViewPort(vidx11_display, scrnum, 0, 0);
821         }
822
823         //XSync(vidx11_display, False);
824
825         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
826         if (!ctx)
827                 Sys_Error ("glXCreateContext failed\n");
828
829         if (!qglXMakeCurrent(vidx11_display, win, ctx))
830                 Sys_Error ("glXMakeCurrent failed\n");
831
832         XSync(vidx11_display, False);
833
834         scr_width = width;
835         scr_height = height;
836
837         if ((qglGetString = GL_GetProcAddress("glGetString")) == NULL)
838                 Sys_Error("glGetString not found in %s", gl_driver);
839
840         gl_renderer = qglGetString(GL_RENDERER);
841         gl_vendor = qglGetString(GL_VENDOR);
842         gl_version = qglGetString(GL_VERSION);
843         gl_extensions = qglGetString(GL_EXTENSIONS);
844         gl_platform = "GLX";
845         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, scrnum);
846
847         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
848         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_video_sync", videosyncfuncs, "-novideosync", false);
849
850         usingmouse = false;
851         vid_hidden = false;
852         GL_Init();
853         return true;
854 }
855
856 void Sys_SendKeyEvents(void)
857 {
858         HandleEvents();
859 }
860
861 /*
862 ===========
863 IN_Commands
864 ===========
865 */
866 void IN_Commands (void)
867 {
868 }
869
870 void IN_Move (usercmd_t *cmd)
871 {
872         if (mouse_avail)
873                 IN_Mouse(cmd, mouse_x, mouse_y);
874         mouse_x = 0;
875         mouse_y = 0;
876 }
877
878 static void *prjobj = NULL;
879
880 int GL_OpenLibrary(const char *name)
881 {
882         Con_Printf("Loading GL driver %s\n", name);
883         GL_CloseLibrary();
884         if (!(prjobj = dlopen(name, RTLD_LAZY)))
885         {
886                 Con_Printf("Unable to open symbol list for %s\n", name);
887                 return false;
888         }
889         strcpy(gl_driver, name);
890         return true;
891 }
892
893 void GL_CloseLibrary(void)
894 {
895         if (prjobj)
896                 dlclose(prjobj);
897         prjobj = NULL;
898         gl_driver[0] = 0;
899         qglXGetProcAddressARB = NULL;
900         gl_extensions = "";
901         gl_platform = "";
902         gl_platformextensions = "";
903 }
904
905 void *GL_GetProcAddress(const char *name)
906 {
907         void *p = NULL;
908         if (qglXGetProcAddressARB != NULL)
909                 p = (void *) qglXGetProcAddressARB(name);
910         if (p == NULL)
911                 p = (void *) dlsym(prjobj, name);
912         return p;
913 }