diff options
Diffstat (limited to 'contrib/x11vnc.c')
| -rw-r--r-- | contrib/x11vnc.c | 201 |
1 files changed, 163 insertions, 38 deletions
diff --git a/contrib/x11vnc.c b/contrib/x11vnc.c index c937a22..e5367db 100644 --- a/contrib/x11vnc.c +++ b/contrib/x11vnc.c @@ -1,5 +1,5 @@ /* - * x0vnc.c: a VNC server for X displays. + * x11vnc.c: a VNC server for X displays. * * Copyright (c) 2002 Karl J. Runge <[email protected]> All rights reserved. * @@ -21,45 +21,30 @@ * * This program is based heavily on the following programs: * - * original x11vnc.c of the libvncserver project (Johannes E. Schindelin) + * the originial x11vnc.c in libvncserver (Johannes E. Schindelin) * krfb, the KDE desktopsharing project (Tim Jansen) * x0rfbserver, the original native X vnc server (Jens Wagner) * * The primary goal of this program is to create a portable and simple * command-line server utility that allows a VNC viewer to connect to an - * actual X display (as x11vnc, krfb, and x0rfbserver do). The only - * non-standard dependency of this program is the static library - * libvncserver.a (although in some environments libjpeg.so may not be - * readily available). To increase portability it is written in plain C. + * actual X display (as the above do). The only non-standard dependency + * of this program is the static library libvncserver.a (although in + * some environments libjpeg.so may not be readily available and needs + * to be installed, it may be found at ftp://ftp.uu.net/graphics/jpeg/). + * To increase portability it is written in plain C. * * The next goal is to improve performance and interactive response. * The algorithm currently used here to achieve this is that of krfb * (based on x0rfbserver algorithm). Additional heuristics are also - * applied. Currently there are a bit too many of these... + * applied (currently there are a bit too many of these...) * * To build: - * Obtain the libvncserver package (http://libvncserver.sourceforge.net) - * and ensure that "make" and "make x11vnc" work correctly. Defining - * HAVE_PTHREADS in the Makefile is recommended. One then could move the - * x11vnc.c file aside, copy this file in its place into the source tree, - * and issue: - * - * make x11vnc - * mv x11vnc x0vnc - * - * to create the x0vnc binary. Otherwise, with x0vnc.c copied to - * libvncserver source directory, something like this should work: - * - * gcc -Wall -DALLOW24BPP -I. -DBACKCHANNEL -c x0vnc.c - * gcc -o x0vnc x0vnc.o -L. -lvncserver -L/usr/local/lib -lz -ljpeg \ - * -L/usr/X11R6/lib -lX11 -lXext -lXtst - * - * include -DHAVE_PTHREADS ... -lpthread to use threads. - * - * On Solaris the 2nd command might look something like: - * - * gcc -o x0vnc x0vnc.o -L. -lvncserver -L/usr/local/lib -lz -ljpeg \ - * -lsocket -lnsl -L/usr/X/lib -R/usr/X/lib -lX11 -lXext -lXtst + * Obtain the libvncserver package (http://libvncserver.sourceforge.net). + * As of 12/2002 this version of x11vnc.c is contained in the libvncserver + * CVS tree. Parameters in the Makefile should be adjusted to the build + * system and then "make x11vnc" should create it. For earlier releases + * (say libvncserver-0.4) this file may be inserted in place of the + * original x11vnc.c file. */ #include <unistd.h> @@ -71,11 +56,24 @@ #include <X11/extensions/XTest.h> #include <X11/keysym.h> +/* + * Work around Bool and KeySym same names in X and rfb. + * Bool is #define int in <X11/Xlib.h> + * KeySym is typedef XID in <X11/X.h> + * (note that X and rfb KeySym types are the same so a bit silly to worry... + * the Bool types are different though) + */ +typedef Bool X_Bool; +typedef KeySym X_KeySym; + +/* the #define Bool can be removed: */ #ifdef Bool #undef Bool #endif -#define Bool RFBBool + +/* the KeySym typedef cannot be removed, so use an alias for rest of file: */ #define KeySym RFBKeySym + #include "rfb.h" Display *dpy = 0; @@ -129,6 +127,8 @@ int shared = 0; /* share vnc display. */ int view_only = 0; /* client can only watch. */ int connect_once = 1; /* allow only one client connection. */ +int use_altgr = 0; /* use the altgr_keyboard modifier tweak */ + /* * waitms is the msec to wait between screen polls. Not too old h/w shows * poll times of 15-35ms, so maybe this value cuts the rest load by 2 or so. @@ -143,7 +143,7 @@ int tile_fuzz = 2; /* tolerance for suspecting changed tiles touching */ /* a known changed tile. */ int grow_fill = 3; /* do the grow islands heuristic with this width. */ int gaps_fill = 4; /* do a final pass to try to fill gaps between tiles. */ -double fs_frac = 0.5; /* threshold tile fraction to do fullscreen updates. */ +double fs_frac = 0.6; /* threshold tile fraction to do fullscreen updates. */ #define NSCAN 32 int scanlines[NSCAN] = { /* scan pattern jitter from x0rfbserver */ @@ -217,6 +217,115 @@ enum rfbNewClientAction new_client(rfbClientPtr client) { return(RFB_CLIENT_ACCEPT); } +/* For tweaking modifiers wrt the Alt-Graph key */ + +#define LEFTSHIFT 1 +#define RIGHTSHIFT 2 +#define ALTGR 4 +char mod_state = 0; + +char modifiers[0x100]; +KeyCode keycodes[0x100], left_shift_code, right_shift_code, altgr_code; + +void initialize_keycodes() { + X_KeySym key, *keymap; + int i, j, minkey, maxkey, syms_per_keycode; + + memset(modifiers, -1, sizeof(modifiers)); + + XDisplayKeycodes(dpy, &minkey, &maxkey); + + keymap = XGetKeyboardMapping(dpy, minkey, (maxkey - minkey + 1), + &syms_per_keycode); + + for (i = minkey; i <= maxkey; i++) { + for (j = 0; j < syms_per_keycode; j++) { + key = keymap[ (i - minkey) * syms_per_keycode + j ]; + if ( key >= ' ' && key < 0x100 + && i == XKeysymToKeycode(dpy, key) ) { + keycodes[key] = i; + modifiers[key] = j; + } + } + } + + left_shift_code = XKeysymToKeycode(dpy, XK_Shift_L); + right_shift_code = XKeysymToKeycode(dpy, XK_Shift_R); + altgr_code = XKeysymToKeycode(dpy, XK_Mode_switch); + + XFree ((void *) keymap); +} + +void tweak_mod(char mod, Bool down) { + Bool is_shift = mod_state & (LEFTSHIFT|RIGHTSHIFT); + X_Bool dn = (X_Bool) down; + + if (mod < 0) { + return; + } + + X_LOCK + if (is_shift && mod != 1) { + if (mod_state & LEFTSHIFT) { + XTestFakeKeyEvent(dpy, left_shift_code, !dn, CurrentTime); + } + if (mod_state & RIGHTSHIFT) { + XTestFakeKeyEvent(dpy, right_shift_code, !dn, CurrentTime); + } + } + if ( ! is_shift && mod == 1 ) { + XTestFakeKeyEvent(dpy, left_shift_code, dn, CurrentTime); + } + if ( (mod_state & ALTGR) && mod != 2 ) { + XTestFakeKeyEvent(dpy, altgr_code, !dn, CurrentTime); + } + if ( ! (mod_state & ALTGR) && mod == 2 ) { + XTestFakeKeyEvent(dpy, altgr_code, dn, CurrentTime); + } + X_UNLOCK +} + +static void altgr_keyboard(Bool down, KeySym keysym, rfbClientPtr client) { + KeyCode k; + int tweak = 0; + + if (view_only) { + return; + } + +#define ADJUSTMOD(sym, state) \ + if (keysym == sym) { \ + if (down) { \ + mod_state |= state; \ + } else { \ + mod_state &= ~state; \ + } \ + } + + ADJUSTMOD(XK_Shift_L, LEFTSHIFT) + ADJUSTMOD(XK_Shift_R, RIGHTSHIFT) + ADJUSTMOD(XK_Mode_switch, ALTGR) + + if ( down && keysym >= ' ' && keysym < 0x100 ) { + tweak = 1; + tweak_mod(modifiers[keysym], True); + k = keycodes[keysym]; + } else { + X_LOCK + k = XKeysymToKeycode(dpy, (X_KeySym) keysym); + X_UNLOCK + } + if ( k != NoSymbol ) { + X_LOCK + XTestFakeKeyEvent(dpy, k, (X_Bool) down, CurrentTime); + X_UNLOCK + } + + if ( tweak ) { + tweak_mod(modifiers[keysym], False); + } +} + /* key event handler */ static void keyboard(Bool down, KeySym keysym, rfbClientPtr client) { KeyCode k; @@ -224,19 +333,23 @@ static void keyboard(Bool down, KeySym keysym, rfbClientPtr client) { if (view_only) { return; } + + if (use_altgr) { + altgr_keyboard(down, keysym, client); + return; + } X_LOCK - /* KeySym is XID in <X11/X.h> */ - k = XKeysymToKeycode(dpy, (XID) keysym); + k = XKeysymToKeycode(dpy, (X_KeySym) keysym); if ( k != NoSymbol ) { - /* Bool is int in <X11/Xlib.h> */ - XTestFakeKeyEvent(dpy, k, (int) down, CurrentTime); + XTestFakeKeyEvent(dpy, k, (X_Bool) down, CurrentTime); XFlush(dpy); got_user_input++; } + X_UNLOCK } @@ -1212,7 +1325,7 @@ void watch_loop(void) { void print_help() { char help[] = -"x0vnc options:\n" +"x11vnc options:\n" "\n" "-defer time time in ms to wait for updates before sending to\n" " client [rfbDeferUpdateTime] (default %d)\n" @@ -1231,6 +1344,9 @@ void print_help() { " horizontal tiles into one big rectangle) (default %s).\n" "-nohints do not use hints; send each tile separately.\n" "\n" +"-altgr use a mechanism to properly handle the AltGr modifier\n" +" on certain keyboards (default %d).\n" +"-noaltgr send the keysym directly to the X server.\n" "-threads use threaded algorithm [rfbRunEventLoop] if compiled\n" " with threads (default %s).\n" "-nothreads do not use [rfbRunEventLoop].\n" @@ -1242,8 +1358,9 @@ void print_help() { ; fprintf(stderr, help, defer_update, waitms, gaps_fill, grow_fill, fs_frac, tile_fuzz, - use_hints ? "on":"off", use_threads ? "on":"off", - view_only ? "on":"off", shared ? "on":"off"); + use_hints ? "on":"off", use_altgr ? "on":"off", + use_threads ? "on":"off", view_only ? "on":"off", + shared ? "on":"off"); rfbUsage(); exit(1); } @@ -1282,6 +1399,10 @@ int main(int argc, char** argv) { use_threads = 1; } else if (!strcmp(argv[i], "-nothreads")) { use_threads = 0; + } else if (!strcmp(argv[i], "-altgr")) { + use_altgr = 1; + } else if (!strcmp(argv[i], "-noaltgr")) { + use_altgr = 0; } else if (!strcmp(argv[i], "-viewonly")) { view_only = 1; } else if (!strcmp(argv[i], "-shared")) { @@ -1370,6 +1491,10 @@ int main(int argc, char** argv) { initialize_shm(); + if (use_altgr) { + initialize_keycodes(); + } + printf("screen setup finished.\n"); watch_loop(); |