GL_NV_vertex_array_range support added, but disabled by default because for some...
[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 dllfunction_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)(GLint divisor, GLint remainder, GLuint *count);
65
66 static dllfunction_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 vidx11_screen;
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 XLateKey(XKeyEvent *ev)
110 {
111         int key = 0;
112         char buf[64];
113         KeySym keysym;
114
115         XLookupString(ev, buf, sizeof buf, &keysym, 0);
116
117         switch(keysym)
118         {
119                 case XK_KP_Page_Up:      key = K_KP_PGUP; break;
120                 case XK_Page_Up:         key = K_PGUP; break;
121
122                 case XK_KP_Page_Down: key = K_KP_PGDN; break;
123                 case XK_Page_Down:       key = K_PGDN; break;
124
125                 case XK_KP_Home: key = K_KP_HOME; break;
126                 case XK_Home:    key = K_HOME; break;
127
128                 case XK_KP_End:  key = K_KP_END; break;
129                 case XK_End:     key = K_END; break;
130
131                 case XK_KP_Left: key = K_KP_LEFTARROW; break;
132                 case XK_Left:    key = K_LEFTARROW; break;
133
134                 case XK_KP_Right: key = K_KP_RIGHTARROW; break;
135                 case XK_Right:  key = K_RIGHTARROW;             break;
136
137                 case XK_KP_Down: key = K_KP_DOWNARROW; break;
138                 case XK_Down:    key = K_DOWNARROW; break;
139
140                 case XK_KP_Up:   key = K_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 = K_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
152                 case XK_F2:              key = K_F2;                            break;
153
154                 case XK_F3:              key = K_F3;                            break;
155
156                 case XK_F4:              key = K_F4;                            break;
157
158                 case XK_F5:              key = K_F5;                            break;
159
160                 case XK_F6:              key = K_F6;                            break;
161
162                 case XK_F7:              key = K_F7;                            break;
163
164                 case XK_F8:              key = K_F8;                            break;
165
166                 case XK_F9:              key = K_F9;                            break;
167
168                 case XK_F10:            key = K_F10;                     break;
169
170                 case XK_F11:            key = K_F11;                     break;
171
172                 case XK_F12:            key = K_F12;                     break;
173
174                 case XK_BackSpace: key = K_BACKSPACE; break;
175
176                 case XK_KP_Delete: key = K_KP_DEL; break;
177                 case XK_Delete: key = K_DEL; break;
178
179                 case XK_Pause:  key = K_PAUSE;           break;
180
181                 case XK_Shift_L:
182                 case XK_Shift_R:        key = K_SHIFT;          break;
183
184                 case XK_Execute:
185                 case XK_Control_L:
186                 case XK_Control_R:      key = K_CTRL;            break;
187
188                 case XK_Alt_L:
189                 case XK_Meta_L:
190                 case XK_Alt_R:
191                 case XK_Meta_R: key = K_ALT;                    break;
192
193                 case XK_KP_Begin: key = K_KP_5; break;
194
195                 case XK_Insert:key = K_INS; break;
196                 case XK_KP_Insert: key = K_KP_INS; break;
197
198                 case XK_KP_Multiply: key = '*'; break;
199                 case XK_KP_Add:  key = K_KP_PLUS; break;
200                 case XK_KP_Subtract: key = K_KP_MINUS; break;
201                 case XK_KP_Divide: key = K_KP_SLASH; break;
202
203 #if 0
204                 case 0x021: key = '1';break;/* [!] */
205                 case 0x040: key = '2';break;/* [@] */
206                 case 0x023: key = '3';break;/* [#] */
207                 case 0x024: key = '4';break;/* [$] */
208                 case 0x025: key = '5';break;/* [%] */
209                 case 0x05e: key = '6';break;/* [^] */
210                 case 0x026: key = '7';break;/* [&] */
211                 case 0x02a: key = '8';break;/* [*] */
212                 case 0x028: key = '9';;break;/* [(] */
213                 case 0x029: key = '0';break;/* [)] */
214                 case 0x05f: key = '-';break;/* [_] */
215                 case 0x02b: key = '=';break;/* [+] */
216                 case 0x07c: key = '\'';break;/* [|] */
217                 case 0x07d: key = '[';break;/* [}] */
218                 case 0x07b: key = ']';break;/* [{] */
219                 case 0x022: key = '\'';break;/* ["] */
220                 case 0x03a: key = ';';break;/* [:] */
221                 case 0x03f: key = '/';break;/* [?] */
222                 case 0x03e: key = '.';break;/* [>] */
223                 case 0x03c: key = ',';break;/* [<] */
224 #endif
225
226                 default:
227                         key = *(unsigned char*)buf;
228                         if (key >= 'A' && key <= 'Z')
229                                 key = key - 'A' + 'a';
230                         break;
231         }
232
233         return key;
234 }
235
236 static Cursor CreateNullCursor(Display *display, Window root)
237 {
238         Pixmap cursormask;
239         XGCValues xgc;
240         GC gc;
241         XColor dummycolour;
242         Cursor cursor;
243
244         cursormask = XCreatePixmap(display, root, 1, 1, 1);
245         xgc.function = GXclear;
246         gc =  XCreateGC(display, cursormask, GCFunction, &xgc);
247         XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
248         dummycolour.pixel = 0;
249         dummycolour.red = 0;
250         dummycolour.flags = 04;
251         cursor = XCreatePixmapCursor(display, cursormask, cursormask, &dummycolour,&dummycolour, 0,0);
252         XFreePixmap(display,cursormask);
253         XFreeGC(display,gc);
254         return cursor;
255 }
256
257 static void install_grabs(void)
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 (vid_dga.integer)
272         {
273                 int MajorVersion, MinorVersion;
274
275                 if (!XF86DGAQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
276                 {
277                         // unable to query, probalby not supported
278                         Con_Printf( "Failed to detect XF86DGA Mouse\n" );
279                         vid_dga.integer = 0;
280                 }
281                 else
282                 {
283                         vid_dga.integer = 1;
284                         XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), XF86DGADirectMouse);
285                         XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
286                 }
287         }
288         else
289                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, scr_width / 2, scr_height / 2);
290
291         XGrabKeyboard(vidx11_display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
292
293         mouse_active = true;
294         mouse_x = mouse_y = 0;
295 }
296
297 static void uninstall_grabs(void)
298 {
299         if (!vidx11_display || !win)
300                 return;
301
302         if (vid_dga.integer == 1)
303                 XF86DGADirectVideo(vidx11_display, DefaultScreen(vidx11_display), 0);
304
305         XUngrabPointer(vidx11_display, CurrentTime);
306         XUngrabKeyboard(vidx11_display, CurrentTime);
307
308 // inviso cursor
309         XUndefineCursor(vidx11_display, win);
310
311         mouse_active = false;
312 }
313
314 static void HandleEvents(void)
315 {
316         XEvent event;
317         qboolean dowarp = false;
318
319         if (!vidx11_display)
320                 return;
321
322         while (XPending(vidx11_display))
323         {
324                 XNextEvent(vidx11_display, &event);
325
326                 switch (event.type)
327                 {
328                 case KeyPress:
329                         // key pressed
330                         Key_Event(XLateKey(&event.xkey), true);
331                         break;
332
333                 case KeyRelease:
334                         // key released
335                         Key_Event(XLateKey(&event.xkey), false);
336                         break;
337
338                 case MotionNotify:
339                         // mouse moved
340                         if (usingmouse)
341                         {
342                                 if (vid_dga.integer == 1)
343                                 {
344                                         mouse_x += event.xmotion.x_root * vid_dga_mouseaccel.value;
345                                         mouse_y += event.xmotion.y_root * vid_dga_mouseaccel.value;
346                                 }
347                                 else
348                                 {
349
350                                         if (!event.xmotion.send_event)
351                                         {
352                                                 mouse_x += event.xmotion.x - p_mouse_x;
353                                                 mouse_y += event.xmotion.y - p_mouse_y;
354                                                 if (abs(scr_width/2 - event.xmotion.x) > scr_width / 4 || abs(scr_height/2 - event.xmotion.y) > scr_height / 4)
355                                                         dowarp = true;
356                                         }
357                                         p_mouse_x = event.xmotion.x;
358                                         p_mouse_y = event.xmotion.y;
359                                 }
360                         }
361                         else
362                                 ui_mouseupdate(event.xmotion.x, event.xmotion.y);
363                         break;
364
365                 case ButtonPress:
366                         // mouse button pressed
367                         switch(event.xbutton.button)
368                         {
369                         case 1:
370                                 Key_Event(K_MOUSE1, true);
371                                 break;
372                         case 2:
373                                 Key_Event(K_MOUSE3, true);
374                                 break;
375                         case 3:
376                                 Key_Event(K_MOUSE2, true);
377                                 break;
378                         case 4:
379                                 Key_Event(K_MWHEELUP, true);
380                                 break;
381                         case 5:
382                                 Key_Event(K_MWHEELDOWN, true);
383                                 break;
384                         default:
385                                 Con_Printf("HandleEvents: ButtonPress gave value %d, 1-5 expected\n", event.xbutton.button);
386                                 break;
387                         }
388                         break;
389
390                 case ButtonRelease:
391                         // mouse button released
392                         switch(event.xbutton.button)
393                         {
394                         case 1:
395                                 Key_Event(K_MOUSE1, false);
396                                 break;
397                         case 2:
398                                 Key_Event(K_MOUSE3, false);
399                                 break;
400                         case 3:
401                                 Key_Event(K_MOUSE2, false);
402                                 break;
403                         case 4:
404                                 Key_Event(K_MWHEELUP, false);
405                                 break;
406                         case 5:
407                                 Key_Event(K_MWHEELDOWN, false);
408                                 break;
409                         default:
410                                 Con_Printf("HandleEvents: ButtonRelease gave value %d, 1-5 expected\n", event.xbutton.button);
411                                 break;
412                         }
413                         break;
414
415                 case CreateNotify:
416                         // window created
417                         win_x = event.xcreatewindow.x;
418                         win_y = event.xcreatewindow.y;
419                         break;
420
421                 case ConfigureNotify:
422                         // window changed size/location
423                         win_x = event.xconfigure.x;
424                         win_y = event.xconfigure.y;
425                         break;
426                 case DestroyNotify:
427                         // window has been destroyed
428                         Sys_Quit();
429                         break;
430                 case ClientMessage:
431                         // window manager messages
432                         if ((event.xclient.format == 32) && (event.xclient.data.l[0] == wm_delete_window_atom))
433                                 Sys_Quit();
434                         break;
435                 case MapNotify:
436                         // window restored
437                         vid_hidden = false;
438                         vid_allowhwgamma = true;
439                         break;
440                 case UnmapNotify:
441                         // window iconified/rolledup/whatever
442                         vid_hidden = true;
443                         vid_allowhwgamma = false;
444                         VID_RestoreSystemGamma();
445                         break;
446                 case FocusIn:
447                         // window is now the input focus
448                         vid_allowhwgamma = true;
449                         break;
450                 case FocusOut:
451                         // window is no longer the input focus
452                         vid_allowhwgamma = false;
453                         VID_RestoreSystemGamma();
454                         break;
455                 case EnterNotify:
456                         // mouse entered window
457                         vid_allowhwgamma = true;
458                         break;
459                 case LeaveNotify:
460                         // mouse left window
461                         vid_allowhwgamma = false;
462                         VID_RestoreSystemGamma();
463                         break;
464                 }
465         }
466
467         if (dowarp)
468         {
469                 /* move the mouse to the window center again */
470                 p_mouse_x = scr_width / 2;
471                 p_mouse_y = scr_height / 2;
472                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, p_mouse_x, p_mouse_y);
473         }
474
475 }
476
477 static void IN_DeactivateMouse( void )
478 {
479         if (!mouse_avail || !vidx11_display || !win)
480                 return;
481
482         if (mouse_active)
483         {
484                 uninstall_grabs();
485                 mouse_active = false;
486         }
487 }
488
489 static void IN_ActivateMouse( void )
490 {
491         if (!mouse_avail || !vidx11_display || !win)
492                 return;
493
494         if (!mouse_active)
495         {
496                 mouse_x = mouse_y = 0; // don't spazz
497                 install_grabs();
498                 mouse_active = true;
499         }
500 }
501
502 void VID_Shutdown(void)
503 {
504         if (!ctx || !vidx11_display)
505                 return;
506
507         vid_hidden = true;
508         usingmouse = false;
509         if (vidx11_display)
510         {
511                 VID_RestoreSystemGamma();
512                 uninstall_grabs();
513
514                 // FIXME: glXDestroyContext here?
515                 if (vidmode_active)
516                         XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[0]);
517                 if (win)
518                         XDestroyWindow(vidx11_display, win);
519                 XCloseDisplay(vidx11_display);
520         }
521         vidmode_active = false;
522         vidx11_display = NULL;
523         win = 0;
524         ctx = NULL;
525
526         GL_CloseLibrary();
527 }
528
529 void signal_handler(int sig)
530 {
531         printf("Received signal %d, exiting...\n", sig);
532         VID_RestoreSystemGamma();
533         Sys_Quit();
534         exit(0);
535 }
536
537 void InitSig(void)
538 {
539         signal(SIGHUP, signal_handler);
540         signal(SIGINT, signal_handler);
541         signal(SIGQUIT, signal_handler);
542         signal(SIGILL, signal_handler);
543         signal(SIGTRAP, signal_handler);
544         signal(SIGIOT, signal_handler);
545         signal(SIGBUS, signal_handler);
546         signal(SIGFPE, signal_handler);
547         signal(SIGSEGV, signal_handler);
548         signal(SIGTERM, signal_handler);
549 }
550
551 /*
552 =================
553 VID_GetWindowSize
554 =================
555 */
556 void VID_GetWindowSize (int *x, int *y, int *width, int *height)
557 {
558         *x = *y = 0;
559         *width = scr_width;
560         *height = scr_height;
561 }
562
563 void VID_Finish (void)
564 {
565         int usemouse;
566         if (r_render.integer)
567         {
568                 qglFinish();
569                 qglXSwapBuffers(vidx11_display, win);
570         }
571
572 // handle the mouse state when windowed if that's changed
573         usemouse = false;
574         if (vid_mouse.integer && !key_consoleactive)
575                 usemouse = true;
576         if (vidmode_active)
577                 usemouse = true;
578         if (usemouse)
579         {
580                 if (!usingmouse)
581                 {
582                         usingmouse = true;
583                         IN_ActivateMouse ();
584                 }
585         }
586         else
587         {
588                 if (usingmouse)
589                 {
590                         usingmouse = false;
591                         IN_DeactivateMouse ();
592                 }
593         }
594 }
595
596 int VID_SetGamma(unsigned short *ramps)
597 {
598         return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
599 }
600
601 int VID_GetGamma(unsigned short *ramps)
602 {
603         return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
604 }
605
606 void VID_Init(void)
607 {
608         Cvar_RegisterVariable (&vid_dga);
609         Cvar_RegisterVariable (&vid_dga_mouseaccel);
610         InitSig(); // trap evil signals
611         if (COM_CheckParm ("-nomouse") || COM_CheckParm("-safe"))
612                 mouse_avail = false;
613 }
614
615 void VID_BuildGLXAttrib(int *attrib, int stencil)
616 {
617         *attrib++ = GLX_RGBA;
618         *attrib++ = GLX_RED_SIZE;*attrib++ = 1;
619         *attrib++ = GLX_GREEN_SIZE;*attrib++ = 1;
620         *attrib++ = GLX_BLUE_SIZE;*attrib++ = 1;
621         *attrib++ = GLX_DOUBLEBUFFER;
622         *attrib++ = GLX_DEPTH_SIZE;*attrib++ = 1;
623         // if stencil is enabled, ask for alpha too
624         if (stencil)
625         {
626                 *attrib++ = GLX_STENCIL_SIZE;*attrib++ = 8;
627                 *attrib++ = GLX_ALPHA_SIZE;*attrib++ = 1;
628         }
629         *attrib++ = None;
630 }
631
632 int VID_InitMode(int fullscreen, int width, int height, int bpp, int stencil)
633 {
634         int i;
635         int attrib[32];
636         XSetWindowAttributes attr;
637         unsigned long mask;
638         Window root;
639         XVisualInfo *visinfo;
640         int MajorVersion, MinorVersion;
641         const char *drivername;
642
643         drivername = "libGL.so.1";
644         i = COM_CheckParm("-gl_driver");
645         if (i && i < com_argc - 1)
646                 drivername = com_argv[i + 1];
647         if (!GL_OpenLibrary(drivername))
648         {
649                 Con_Printf("Unable to load GL driver \"%s\"\n", drivername);
650                 return false;
651         }
652
653         if (!(vidx11_display = XOpenDisplay(NULL)))
654         {
655                 Con_Printf("Couldn't open the X display\n");
656                 return false;
657         }
658
659         vidx11_screen = DefaultScreen(vidx11_display);
660         root = RootWindow(vidx11_display, vidx11_screen);
661
662         // Get video mode list
663         MajorVersion = MinorVersion = 0;
664         if (!XF86VidModeQueryVersion(vidx11_display, &MajorVersion, &MinorVersion))
665                 vidmode_ext = false;
666         else
667         {
668                 Con_Printf("Using XFree86-VidModeExtension Version %d.%d\n", MajorVersion, MinorVersion);
669                 vidmode_ext = true;
670         }
671
672         if ((qglXChooseVisual = GL_GetProcAddress("glXChooseVisual")) == NULL
673          || (qglXCreateContext = GL_GetProcAddress("glXCreateContext")) == NULL
674          || (qglXMakeCurrent = GL_GetProcAddress("glXMakeCurrent")) == NULL
675          || (qglXSwapBuffers = GL_GetProcAddress("glXSwapBuffers")) == NULL
676          || (qglXQueryExtensionsString = GL_GetProcAddress("glXQueryExtensionsString")) == NULL)
677         {
678                 Con_Printf("glX functions not found in %s\n", gl_driver);
679                 return false;
680         }
681
682         VID_BuildGLXAttrib(attrib, stencil);
683         visinfo = qglXChooseVisual(vidx11_display, vidx11_screen, attrib);
684         if (!visinfo)
685         {
686                 Con_Printf("Couldn't get an RGB, Double-buffered, Depth visual\n");
687                 return false;
688         }
689
690         if (vidmode_ext)
691         {
692                 int best_fit, best_dist, dist, x, y;
693
694                 // Are we going fullscreen?  If so, let's change video mode
695                 if (fullscreen)
696                 {
697                         XF86VidModeGetAllModeLines(vidx11_display, vidx11_screen, &num_vidmodes, &vidmodes);
698                         best_dist = 9999999;
699                         best_fit = -1;
700
701                         for (i = 0; i < num_vidmodes; i++)
702                         {
703                                 if (width > vidmodes[i]->hdisplay || height > vidmodes[i]->vdisplay)
704                                         continue;
705
706                                 x = width - vidmodes[i]->hdisplay;
707                                 y = height - vidmodes[i]->vdisplay;
708                                 dist = (x * x) + (y * y);
709                                 if (dist < best_dist)
710                                 {
711                                         best_dist = dist;
712                                         best_fit = i;
713                                 }
714                         }
715
716                         if (best_fit != -1)
717                         {
718                                 // LordHavoc: changed from ActualWidth/ActualHeight =,
719                                 // to width/height =, so the window will take the full area of
720                                 // the mode chosen
721                                 width = vidmodes[best_fit]->hdisplay;
722                                 height = vidmodes[best_fit]->vdisplay;
723
724                                 // change to the mode
725                                 XF86VidModeSwitchToMode(vidx11_display, vidx11_screen, vidmodes[best_fit]);
726                                 vidmode_active = true;
727
728                                 // Move the viewport to top left
729                                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
730                         }
731                         else
732                                 fullscreen = 0;
733                 }
734         }
735
736         // LordHavoc: save the visual for use in gamma ramp settings later
737         vidx11_visual = visinfo->visual;
738
739         /* window attributes */
740         attr.background_pixel = 0;
741         attr.border_pixel = 0;
742         // LordHavoc: save the colormap for later, too
743         vidx11_colormap = attr.colormap = XCreateColormap(vidx11_display, root, visinfo->visual, AllocNone);
744         attr.event_mask = X_MASK;
745         if (vidmode_active)
746         {
747                 mask = CWBackPixel | CWColormap | CWSaveUnder | CWBackingStore | CWEventMask | CWOverrideRedirect;
748                 attr.override_redirect = True;
749                 attr.backing_store = NotUseful;
750                 attr.save_under = False;
751         }
752         else
753                 mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
754
755         win = XCreateWindow(vidx11_display, root, 0, 0, width, height, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
756         XStoreName(vidx11_display, win, gamename);
757         XMapWindow(vidx11_display, win);
758
759         // LordHavoc: making the close button on a window do the right thing
760         // seems to involve this mess, sigh...
761         wm_delete_window_atom = XInternAtom(vidx11_display, "WM_DELETE_WINDOW", false);
762         XSetWMProtocols(vidx11_display, win, &wm_delete_window_atom, 1);
763
764         if (vidmode_active)
765         {
766                 XMoveWindow(vidx11_display, win, 0, 0);
767                 XRaiseWindow(vidx11_display, win);
768                 XWarpPointer(vidx11_display, None, win, 0, 0, 0, 0, 0, 0);
769                 XFlush(vidx11_display);
770                 // Move the viewport to top left
771                 XF86VidModeSetViewPort(vidx11_display, vidx11_screen, 0, 0);
772         }
773
774         //XSync(vidx11_display, False);
775
776         ctx = qglXCreateContext(vidx11_display, visinfo, NULL, True);
777         if (!ctx)
778                 Sys_Error ("glXCreateContext failed\n");
779
780         if (!qglXMakeCurrent(vidx11_display, win, ctx))
781                 Sys_Error ("glXMakeCurrent failed\n");
782
783         XSync(vidx11_display, False);
784
785         scr_width = width;
786         scr_height = height;
787
788         if ((qglGetString = GL_GetProcAddress("glGetString")) == NULL)
789                 Sys_Error("glGetString not found in %s", gl_driver);
790
791         gl_renderer = qglGetString(GL_RENDERER);
792         gl_vendor = qglGetString(GL_VENDOR);
793         gl_version = qglGetString(GL_VERSION);
794         gl_extensions = qglGetString(GL_EXTENSIONS);
795         gl_platform = "GLX";
796         gl_platformextensions = qglXQueryExtensionsString(vidx11_display, vidx11_screen);
797
798         GL_CheckExtension("GLX_ARB_get_proc_address", getprocaddressfuncs, "-nogetprocaddress", false);
799         gl_videosyncavailable = GL_CheckExtension("GLX_SGI_video_sync", videosyncfuncs, "-novideosync", false);
800
801         usingmouse = false;
802         vid_hidden = false;
803         vid_allowhwgamma = true;
804         GL_Init();
805         return true;
806 }
807
808 void Sys_SendKeyEvents(void)
809 {
810         HandleEvents();
811 }
812
813 /*
814 ===========
815 IN_Commands
816 ===========
817 */
818 void IN_Commands (void)
819 {
820 }
821
822 void IN_Move (usercmd_t *cmd)
823 {
824         if (mouse_avail)
825                 IN_Mouse(cmd, mouse_x, mouse_y);
826         mouse_x = 0;
827         mouse_y = 0;
828 }
829
830 static void *prjobj = NULL;
831
832 int GL_OpenLibrary(const char *name)
833 {
834         Con_Printf("Loading GL driver %s\n", name);
835         GL_CloseLibrary();
836         if (!(prjobj = dlopen(name, RTLD_LAZY)))
837         {
838                 Con_Printf("Unable to open symbol list for %s\n", name);
839                 return false;
840         }
841         strcpy(gl_driver, name);
842         return true;
843 }
844
845 void GL_CloseLibrary(void)
846 {
847         if (prjobj)
848                 dlclose(prjobj);
849         prjobj = NULL;
850         gl_driver[0] = 0;
851         qglXGetProcAddressARB = NULL;
852         gl_extensions = "";
853         gl_platform = "";
854         gl_platformextensions = "";
855 }
856
857 void *GL_GetProcAddress(const char *name)
858 {
859         void *p = NULL;
860         if (qglXGetProcAddressARB != NULL)
861                 p = (void *) qglXGetProcAddressARB(name);
862         if (p == NULL)
863                 p = (void *) dlsym(prjobj, name);
864         return p;
865 }
866