x11vnc: add -8to24 option for some multi-depth displays.

ChangeLog

+2006-01-14  Karl Runge <runge@karlrunge.com>
+	* x11vnc: add -8to24 option for some multi-depth displays.
+
 2006-01-12  Karl Runge <runge@karlrunge.com>
 	* configure.ac: add switches for most X extensions.
 

x11vnc/8to24.h

+#ifndef _X11VNC_8TO24_H
+#define _X11VNC_8TO24_H
+
+/* -- 8to24.h -- */
+
+extern int multivis_count;
+
+extern void check_for_multivis(void);
+extern void bpp8to24(int, int, int, int);
+extern void mark_8bpp(void);
+
+#endif /* _X11VNC_8TO24_H */

x11vnc/ChangeLog

+2006-01-14  Karl Runge <runge@karlrunge.com>
+	* x11vnc: add -8to24 option for some multi-depth displays (but use
+	  of -overlay is preferred is supported).
+
 2006-01-12  Karl Runge <runge@karlrunge.com>
 	* fix -DSMALL_FOOTPRINT=N builds.
 

x11vnc/Makefile.am

@@ -13,7 +13,7 @@ endif
 
 if HAVE_X
 bin_PROGRAMS=x11vnc
-x11vnc_SOURCES = cleanup.c connections.c cursor.c gui.c help.c inet.c keyboard.c options.c pointer.c rates.c remote.c scan.c screen.c selection.c solid.c user.c userinput.c util.c win_utils.c x11vnc.c x11vnc_defs.c xdamage.c xevents.c xinerama.c xkb_bell.c xrandr.c xrecord.c xwrappers.c allowed_input_t.h blackout_t.h cleanup.h connections.h cursor.h enums.h gui.h help.h inet.h keyboard.h options.h params.h pointer.h rates.h remote.h scan.h screen.h scrollevent_t.h selection.h solid.h tkx11vnc.h user.h userinput.h util.h win_utils.h winattr_t.h x11vnc.h xdamage.h xevents.h xinerama.h xkb_bell.h xrandr.h xrecord.h xwrappers.h
+x11vnc_SOURCES = 8to24.c cleanup.c connections.c cursor.c gui.c help.c inet.c keyboard.c options.c pointer.c rates.c remote.c scan.c screen.c selection.c solid.c user.c userinput.c util.c win_utils.c x11vnc.c x11vnc_defs.c xdamage.c xevents.c xinerama.c xkb_bell.c xrandr.c xrecord.c xwrappers.c 8to24.h allowed_input_t.h blackout_t.h cleanup.h connections.h cursor.h enums.h gui.h help.h inet.h keyboard.h options.h params.h pointer.h rates.h remote.h scan.h screen.h scrollevent_t.h selection.h solid.h tkx11vnc.h user.h userinput.h util.h win_utils.h winattr_t.h x11vnc.h xdamage.h xevents.h xinerama.h xkb_bell.h xrandr.h xrecord.h xwrappers.h
 INCLUDES=@X_CFLAGS@
 x11vnc_LDADD=@X_LIBS@ $(LD_CYGIPC) $(LDADD)
 endif

x11vnc/connections.c

@@ -1512,7 +1512,7 @@ void check_connect_inputs(void) {
 }
 
 void check_gui_inputs(void) {
-	int i, nmax = 0, n = 0, nfds;
+	int i, gnmax = 0, n = 0, nfds;
 	int socks[ICON_MODE_SOCKS];
 	fd_set fds;
 	struct timeval tv;
@@ -1522,8 +1522,8 @@ void check_gui_inputs(void) {
 	for (i=0; i<ICON_MODE_SOCKS; i++) {
 		if (icon_mode_socks[i] >= 0) {
 			socks[n++] = i;
-			if (icon_mode_socks[i] > nmax) {
-				nmax = icon_mode_socks[i];
+			if (icon_mode_socks[i] > gnmax) {
+				gnmax = icon_mode_socks[i];
 			}
 		}
 	}
@@ -1539,7 +1539,7 @@ void check_gui_inputs(void) {
 	tv.tv_sec = 0;
 	tv.tv_usec = 0;
 
-	nfds = select(nmax+1, &fds, NULL, NULL, &tv);
+	nfds = select(gnmax+1, &fds, NULL, NULL, &tv);
 	if (nfds <= 0) {
 		return;
 	}

x11vnc/cursor.c

@@ -1783,4 +1783,3 @@ int check_x11_pointer(void) {
 	return set_cursor(x, y, get_which_cursor());
 }
 
-

x11vnc/help.c

@@ -147,6 +147,38 @@ void print_help(int mode) {
 "-overlay_nocursor      Sets -overlay, but does not try to draw the exact mouse\n"
 "                       cursor shape using the overlay mechanism.\n"
 "\n"
+"-8to24                 If -overlay is not supported on your OS, and you have a\n"
+"                       legacy 8bpp app that you want to view on a multi-depth\n"
+"                       display with default depth 24 (and is 32 bpp), try\n"
+"                       this option.  This option may not work on all X servers\n"
+"                       and hardware (tested on XFree86/Xorg mga driver).\n"
+"\n"
+"                       It enables a hack where x11vnc monitors windows within 3\n"
+"                       levels from the root window.  If it finds any that are\n"
+"                       8bpp it will apply a transformation for pixel data in\n"
+"                       these regions where it extracts the 8bpp index color\n"
+"                       value from bits 25-32 and maps them on to TrueColor\n"
+"                       values and inserts them into bits 1-24 (i.e. overwrites\n"
+"                       bits 1-24).  This method appears to work, but may still\n"
+"                       have bugs and note that it does hog resources.  If there\n"
+"                       are multiple 8bpp windows using different colormaps,\n"
+"                       one may have to iconify all but one for the colors to\n"
+"                       be correct.\n"
+"\n"
+"                       There may also be painting errors for clipping\n"
+"                       and switching between windows of depths 8 and 24.\n"
+"                       Heuristics are applied to try to minimize the painting\n"
+"                       errors.  One can also press 3 Alt_L's in a row to\n"
+"                       refresh the screen if the error does not repair itself.\n"
+"                       Also the option, say, -fixscreen V=3.0 may be use\n"
+"                       to periodically refresh the screen (at the cost of\n"
+"                       bandwidth).\n"
+"\n"
+"                       Note that -8to24 does not work on displays with 8bpp\n"
+"                       default visual with depth 24 applications.  The Xserver\n"
+"                       -cc option can be used to switch the default depth on\n"
+"                       multidepth setups.\n"
+"\n"
 "-scale fraction        Scale the framebuffer by factor \"fraction\".  Values\n"
 "                       less than 1 shrink the fb, larger ones expand it.  Note:\n"
 "                       image may not be sharp and response may be slower.\n"
@@ -1590,6 +1622,8 @@ void print_help(int mode) {
 "                       overlay_cursor  in -overlay mode, enable cursor drawing.\n"
 "                       overlay_nocursor disable cursor drawing. same as\n"
 "                                        nooverlay_cursor.\n"
+"                       8to24           enable  -8to24 mode (if applicable).\n"
+"                       no8to24         disable -8to24 mode.\n"
 "                       visual:vis      set -visual to \"vis\"\n"
 "                       scale:frac      set -scale to \"frac\"\n"
 "                       scale_cursor:f  set -scale_cursor to \"f\"\n"
@@ -1849,10 +1883,10 @@ void print_help(int mode) {
 "                       nowaitmapped clip flashcmap noflashcmap shiftcmap\n"
 "                       truecolor notruecolor overlay nooverlay overlay_cursor\n"
 "                       overlay_yescursor nooverlay_nocursor nooverlay_cursor\n"
-"                       nooverlay_yescursor overlay_nocursor visual scale\n"
-"                       scale_cursor viewonly noviewonly shared noshared\n"
-"                       forever noforever once timeout filexfer deny lock\n"
-"                       nodeny unlock connect allowonce allow localhost\n"
+"                       nooverlay_yescursor overlay_nocursor 8to24 no8to24\n"
+"                       visual scale scale_cursor viewonly noviewonly shared\n"
+"                       noshared forever noforever once timeout filexfer deny\n"
+"                       lock nodeny unlock connect allowonce allow localhost\n"
 "                       nolocalhost listen lookup nolookup accept afteraccept\n"
 "                       gone shm noshm flipbyteorder noflipbyteorder onetile\n"
 "                       noonetile solid_color solid nosolid blackout xinerama\n"

x11vnc/options.c

@@ -88,6 +88,7 @@ int first_conn_timeout = 0;	/* -timeout */
 int flash_cmap = 0;		/* follow installed colormaps */
 int shift_cmap = 0;		/* ncells < 256 and needs shift of pixel values */
 int force_indexed_color = 0;	/* whether to force indexed color for 8bpp */
+int cmap8to24 = 0;		/* -8to24 */
 int launch_gui = 0;		/* -gui */
 
 int use_modifier_tweak = 1;	/* use the shift/altgr modifier tweak */

x11vnc/options.h

@@ -63,6 +63,7 @@ extern int first_conn_timeout;
 extern int flash_cmap;
 extern int shift_cmap;
 extern int force_indexed_color;
+extern int cmap8to24;
 extern int launch_gui;
 
 extern int use_modifier_tweak;

x11vnc/remote.c

@@ -979,6 +979,24 @@ char *process_remote_cmd(char *cmd, int stringonly) {
 			rfbLog(" -R cursor:... to re-enable any cursors.\n");
 		}
 		
+	} else if (!strcmp(p, "8to24")) {
+		if (query) {
+			snprintf(buf, bufn, "ans=%s:%d", p, cmap8to24);
+			goto qry;
+		}
+		rfbLog("remote_cmd: turning on -8to24 mode.\n");
+		cmap8to24 = 1;
+		do_new_fb(0);
+
+	} else if (!strcmp(p, "no8to24")) {
+		if (query) {
+			snprintf(buf, bufn, "ans=%s:%d", p, !cmap8to24);
+			goto qry;
+		}
+		rfbLog("remote_cmd: turning off -8to24 mode.\n");
+		cmap8to24 = 0;
+		do_new_fb(0);
+
 	} else if (strstr(p, "visual") == p) {
 		COLON_CHECK("visual:")
 		if (query) {

x11vnc/scan.c

@@ -6,6 +6,7 @@
 #include "xdamage.h"
 #include "xrandr.h"
 #include "win_utils.h"
+#include "8to24.h"
 #include "screen.h"
 #include "pointer.h"
 #include "cleanup.h"
@@ -1158,6 +1159,7 @@ void scale_rect(double factor, int blend, int interpolate, int Bpp,
 }
 
 void scale_and_mark_rect(int X1, int Y1, int X2, int Y2) {
+	char *src_fb = main_fb;
 
 	if (!screen || !rfb_fb || !main_fb) {
 		return;
@@ -1181,8 +1183,12 @@ void scale_and_mark_rect(int X1, int Y1, int X2, int Y2) {
 		}
 	}
 
+	if (cmap8to24 && cmap8to24_fb) {
+		src_fb = cmap8to24_fb;
+	}
+
 	scale_rect(scale_fac, scaling_blend, scaling_interpolate, bpp/8,
-	    main_fb, main_bytes_per_line, rfb_fb, rfb_bytes_per_line,
+	    src_fb, main_bytes_per_line, rfb_fb, rfb_bytes_per_line,
 	    dpy_x, dpy_y, scaled_x, scaled_y, X1, Y1, X2, Y2, 1);
 }
 
@@ -1212,8 +1218,17 @@ void mark_rect_as_modified(int x1, int y1, int x2, int y2, int force) {
 
 	if (rfb_fb == main_fb || force) {
 		rfbMarkRectAsModified(screen, x1, y1, x2, y2);
-	} else if (scaling) {
+		return;
+	}
+
+	if (cmap8to24) {
+		bpp8to24(x1, y1, x2, y2);
+	}
+
+	if (scaling) {
 		scale_and_mark_rect(x1, y1, x2, y2);
+	} else {
+		rfbMarkRectAsModified(screen, x1, y1, x2, y2);
 	}
 }
 
@@ -2416,6 +2431,9 @@ int scan_for_updates(int count_only) {
 			/* check for changed colormap */
 			set_colormap(0);
 		}
+		if (cmap8to24 && scan_count % 4 == 0) {
+			check_for_multivis();
+		}
 		if (use_xdamage) {
 			/* first pass collecting DAMAGE events: */
 			collect_xdamage(scan_count, 0);

x11vnc/screen.c

@@ -546,6 +546,7 @@ void do_new_fb(int reset_mem) {
 	XImage *fb;
 	char *old_main  = main_fb;
 	char *old_rfb   = rfb_fb;
+	char *old_8to24 = cmap8to24_fb;
 
 	/* for threaded we really should lock libvncserver out. */
 	if (use_threads) {
@@ -569,12 +570,15 @@ void do_new_fb(int reset_mem) {
 		initialize_polling_images();
 	}
 
-	if (old_main != old_rfb && old_main) {
+	if (old_main) {
 		free(old_main);
 	}
-	if (old_rfb) {
+	if (old_rfb && old_rfb != old_main) {
 		free(old_rfb);
 	}
+	if (old_8to24 && old_8to24 != old_main && old_8to24 != old_rfb) {
+		free(old_8to24);
+	}
 	fb0 = fb;
 }
 
@@ -1754,12 +1758,31 @@ void initialize_screen(int *argc, char **argv, XImage *fb) {
 	if (nofb) {
 		main_fb = NULL;
 		rfb_fb = main_fb;
+		cmap8to24_fb = NULL;
 		screen->displayHook = nofb_hook;
 	} else {
 		main_fb = fb->data;
+		rfb_fb = NULL;
+		cmap8to24_fb = NULL;
+
+		if (cmap8to24) {
+			if (screen->serverFormat.bitsPerPixel != 32 ||
+			    screen->serverFormat.depth != 24) {
+				if (!quiet) rfbLog("disabling -8to24 mode:"
+				    " bpp != 32 or depth != 24\n");
+				cmap8to24 = 0;
+			}
+		}
+		if (cmap8to24) {
+			int n = main_bytes_per_line * fb->height;
+			cmap8to24_fb = (char *) malloc(n);
+			memset(cmap8to24_fb, 0, n);
+		}
 		if (scaling) {
 			rfb_fb = (char *) malloc(rfb_bytes_per_line * height);
 			memset(rfb_fb, 0, rfb_bytes_per_line * height);
+		} else if (cmap8to24) {
+			rfb_fb = cmap8to24_fb;	
 		} else {
 			rfb_fb = main_fb;
 		}
@@ -1768,6 +1791,7 @@ void initialize_screen(int *argc, char **argv, XImage *fb) {
 	if (!quiet) {
 		fprintf(stderr, " main_fb:     %p\n", main_fb);
 		fprintf(stderr, " rfb_fb:      %p\n", rfb_fb);
+		fprintf(stderr, " 8to24_fb:    %p\n", cmap8to24_fb);
 		fprintf(stderr, "\n");
 	}
 
@@ -1780,7 +1804,7 @@ void initialize_screen(int *argc, char **argv, XImage *fb) {
 
 	setup_cursors_and_push();
 
-	if (scaling) {
+	if (scaling || cmap8to24) {
 		mark_rect_as_modified(0, 0, dpy_x, dpy_y, 0);
 	}
 

x11vnc/tkx11vnc

@@ -121,6 +121,7 @@ Screen
 	=GAL OverlayVisuals::
 	overlay
 	overlay_nocursor
+	8to24
 	=GAL LOFF
 	=GAL 8-Bit-Color::
 	flashcmap
@@ -1446,7 +1447,7 @@ proc parse_help {} {
 		if {! $sawopts} {
 			continue;
 		}
-		if {[regexp {^-([A-z_][A-z_]*)} $line match name]} {
+		if {[regexp {^-([0-9A-z_][0-9A-z_]*)} $line match name]} {
 			set allnames($name) 1;
 			if {"$curropt" != "no$name" && "no$curropt" != "$name"} {
 				set curropt $name;
@@ -1525,7 +1526,7 @@ proc parse_remote_help {} {
 		if {! $sawopts} {
 			continue;
 		}
-		if {[regexp {^([A-z_][A-z_:]*)} $line match name]} {
+		if {[regexp {^([0-9A-z_][0-9A-z_:]*)} $line match name]} {
 			regsub {:.*$} $name "" popt
 			lappend possopts $popt
 			if {"$curropt" != "no$name" && "no$curropt" != "$name"} {

x11vnc/tkx11vnc.h

@@ -132,6 +132,7 @@ char gui_code[] = "";
 "	=GAL OverlayVisuals::\n"
 "	overlay\n"
 "	overlay_nocursor\n"
+"	8to24\n"
 "	=GAL LOFF\n"
 "	=GAL 8-Bit-Color::\n"
 "	flashcmap\n"
@@ -1457,7 +1458,7 @@ char gui_code[] = "";
 "		if {! $sawopts} {\n"
 "			continue;\n"
 "		}\n"
-"		if {[regexp {^-([A-z_][A-z_]*)} $line match name]} {\n"
+"		if {[regexp {^-([0-9A-z_][0-9A-z_]*)} $line match name]} {\n"
 "			set allnames($name) 1;\n"
 "			if {\"$curropt\" != \"no$name\" && \"no$curropt\" != \"$name\"} {\n"
 "				set curropt $name;\n"
@@ -1536,7 +1537,7 @@ char gui_code[] = "";
 "		if {! $sawopts} {\n"
 "			continue;\n"
 "		}\n"
-"		if {[regexp {^([A-z_][A-z_:]*)} $line match name]} {\n"
+"		if {[regexp {^([0-9A-z_][0-9A-z_:]*)} $line match name]} {\n"
 "			regsub {:.*$} $name \"\" popt\n"
 "			lappend possopts $popt\n"
 "			if {\"$curropt\" != \"no$name\" && \"no$curropt\" != \"$name\"} {\n"

x11vnc/userinput.c

@@ -14,6 +14,7 @@
 #include "keyboard.h"
 #include "solid.h"
 #include "xrandr.h"
+#include "8to24.h"
 
 /*
  * user input handling heuristics
@@ -241,7 +242,7 @@ WIREFRAME_PARMS "0xff,2,0,30+6+6+6,Alt,0.05+0.3+2.0,8"
 shade,linewidth,percent,T+B+L+R,mods,t1+t2+t3+t4
  */
 #define LW_MAX 8
-static unsigned long wireframe_shade;
+static unsigned long wireframe_shade = 0xff;
 static int wireframe_lw;
 static double wireframe_frac;
 static int wireframe_top, wireframe_bot, wireframe_left, wireframe_right;
@@ -3694,6 +3695,25 @@ if (db) fprintf(stderr, "send_copyrect: %d\n", sent_copyrect);
 	/* final push (for -nowirecopyrect) */
 	rfbPE(1000);
 	wireframe_in_progress = 0;
+
+	if (frame_changed && cmap8to24 && multivis_count) {
+		/* handle -8to24 tweak, mark area and check 8bpp... */
+		int x1, x2, y1, y2, f = 16;
+		x1 = nmin(box_x, orig_x) - f;
+		y1 = nmin(box_y, orig_y) - f;
+		x2 = nmax(box_x + box_w, orig_x + orig_w) + f;
+		y2 = nmax(box_y + box_h, orig_y + orig_h) + f;
+		x1 = nfix(x1, dpy_x);
+		x2 = nfix(x2, dpy_x);
+		y1 = nfix(y1, dpy_y);
+		y2 = nfix(y2, dpy_y);
+if (0) fprintf(stderr, "wireframe_in_progress over: %d %d %d %d\n", x1, y1, x2, y2);
+		check_for_multivis();
+		if (1) mark_rect_as_modified(x1, y1, x2, y2, 0);
+		if (0) mark_rect_as_modified(0, 0, dpy_x, dpy_y, 0);
+		if (0) rfbPE(-1);
+	}
+
 	urgent_update = 1;
 	if (use_xdamage) {
 		/* DAMAGE can queue ~1000 rectangles for a move */

x11vnc/util.c

@@ -14,6 +14,8 @@ MUTEX(scrollMutex);
 #endif
 
 int nfix(int i, int n);
+int nmin(int n, int m);
+int nmax(int n, int m);
 int nabs(int n);
 double dabs(double x);
 void lowercase(char *str);
@@ -42,6 +44,9 @@ double rfac(void);
 void rfbPE(long usec);
 void rfbCFD(long usec);
 
+double rect_overlap(int x1, int y1, int x2, int y2, int X1, int Y1,
+    int X2, int Y2);
+
 
 /*
  * routine to keep 0 <= i < n, should use in more places...
@@ -55,6 +60,22 @@ int nfix(int i, int n) {
 	return i;
 }
 
+int nmin(int n, int m) {
+	if (n < m) {
+		return n;
+	} else {
+		return m;
+	}
+}
+
+int nmax(int n, int m) {
+	if (n > m) {
+		return n;
+	} else {
+		return m;
+	}
+}
+
 int nabs(int n) {
 	if (n < 0) {
 		return -n;
@@ -394,4 +415,39 @@ void rfbCFD(long usec) {
 	}
 }
 
+double rect_overlap(int x1, int y1, int x2, int y2, int X1, int Y1,
+    int X2, int Y2) {
+	double a, A, o;
+	sraRegionPtr r, R, overlap;
+	sraRectangleIterator *iter;
+	sraRect rt;
+
+	a = nabs((x2 - x1) * (y2 - y1));
+	A = nabs((X2 - X1) * (Y2 - Y1));
+
+	r = sraRgnCreateRect(x1, y1, x2, y2);
+	R = sraRgnCreateRect(X1, Y1, X2, Y2);
+
+	overlap = sraRgnCreateRect(x1, y1, x2, y2);
+
+	sraRgnAnd(overlap, R);
+	
+	o = 0.0;
+	iter = sraRgnGetIterator(overlap);
+	while (sraRgnIteratorNext(iter, &rt)) {
+		o += nabs( (rt.x2 - rt.x1) * (rt.y2 - rt.y1) );
+	}
+	sraRgnReleaseIterator(iter);
+
+	sraRgnDestroy(r);
+	sraRgnDestroy(R);
+	sraRgnDestroy(overlap);
+
+	if (a < A) {
+		o = o/a;
+	} else {
+		o = o/A;
+	}
+	return o;
+}
 

x11vnc/util.h

@@ -4,6 +4,8 @@
 /* -- util.h -- */
 
 extern int nfix(int i, int n);
+extern int nmin(int n, int m);
+extern int nmax(int n, int m);
 extern int nabs(int n);
 extern double dabs(double x);
 extern void lowercase(char *str);
@@ -31,6 +33,8 @@ extern double rfac(void);
 
 extern void rfbPE(long usec);
 extern void rfbCFD(long usec);
+extern double rect_overlap(int x1, int y1, int x2, int y2, int X1, int Y1,
+    int X2, int Y2);
 
 
 #define NONUL(x) ((x) ? (x) : "")

x11vnc/x11vnc.1

@@ -2,7 +2,7 @@
 .TH X11VNC "1" "January 2006" "x11vnc " "User Commands"
 .SH NAME
 x11vnc - allow VNC connections to real X11 displays
-         version: 0.8, lastmod: 2006-01-11
+         version: 0.8, lastmod: 2006-01-14
 .SH SYNOPSIS
 .B x11vnc
 [OPTION]...
@@ -177,6 +177,40 @@ visual (e.g. some apps have \fB-use24\fR or \fB-visual\fR options).
 Sets \fB-overlay,\fR but does not try to draw the exact mouse
 cursor shape using the overlay mechanism.
 .PP
+\fB-8to24\fR
+.IP
+If \fB-overlay\fR is not supported on your OS, and you have a
+legacy 8bpp app that you want to view on a multi-depth
+display with default depth 24 (and is 32 bpp), try
+this option.  This option may not work on all X servers
+and hardware (tested on XFree86/Xorg mga driver).
+.IP
+It enables a hack where x11vnc monitors windows within 3
+levels from the root window.  If it finds any that are
+8bpp it will apply a transformation for pixel data in
+these regions where it extracts the 8bpp index color
+value from bits 25-32 and maps them on to TrueColor
+values and inserts them into bits 1-24 (i.e. overwrites
+bits 1-24).  This method appears to work, but may still
+have bugs and note that it does hog resources.  If there
+are multiple 8bpp windows using different colormaps,
+one may have to iconify all but one for the colors to
+be correct.
+.IP
+There may also be painting errors for clipping
+and switching between windows of depths 8 and 24.
+Heuristics are applied to try to minimize the painting
+errors.  One can also press 3 Alt_L's in a row to
+refresh the screen if the error does not repair itself.
+Also the option, say, \fB-fixscreen\fR V=3.0 may be use
+to periodically refresh the screen (at the cost of
+bandwidth).
+.IP
+Note that \fB-8to24\fR does not work on displays with 8bpp
+default visual with depth 24 applications.  The Xserver
+\fB-cc\fR option can be used to switch the default depth on
+multidepth setups.
+.PP
 \fB-scale\fR \fIfraction\fR
 .IP
 Scale the framebuffer by factor \fIfraction\fR.  Values
@@ -1979,6 +2013,10 @@ overlay_cursor  in \fB-overlay\fR mode, enable cursor drawing.
 overlay_nocursor disable cursor drawing. same as
 nooverlay_cursor.
 .IP
+8to24           enable  \fB-8to24\fR mode (if applicable).
+.IP
+no8to24         disable \fB-8to24\fR mode.
+.IP
 visual:vis      set \fB-visual\fR to "vis"
 .IP
 scale:frac      set \fB-scale\fR to "frac"
@@ -2417,10 +2455,10 @@ refresh reset close disconnect id sid waitmapped
 nowaitmapped clip flashcmap noflashcmap shiftcmap
 truecolor notruecolor overlay nooverlay overlay_cursor
 overlay_yescursor nooverlay_nocursor nooverlay_cursor
-nooverlay_yescursor overlay_nocursor visual scale
-scale_cursor viewonly noviewonly shared noshared
-forever noforever once timeout filexfer deny lock
-nodeny unlock connect allowonce allow localhost
+nooverlay_yescursor overlay_nocursor 8to24 no8to24
+visual scale scale_cursor viewonly noviewonly shared
+noshared forever noforever once timeout filexfer deny
+lock nodeny unlock connect allowonce allow localhost
 nolocalhost listen lookup nolookup accept afteraccept
 gone shm noshm flipbyteorder noflipbyteorder onetile
 noonetile solid_color solid nosolid blackout xinerama

x11vnc/x11vnc.c

@@ -907,6 +907,7 @@ static void print_settings(int try_http, int bg, char *gui_str) {
 	fprintf(stderr, " flashcmap:  %d\n", flash_cmap);
 	fprintf(stderr, " shiftcmap:  %d\n", shift_cmap);
 	fprintf(stderr, " force_idx:  %d\n", force_indexed_color);
+	fprintf(stderr, " cmap8to24:  %d\n", cmap8to24);
 	fprintf(stderr, " visual:     %s\n", visual_str ? visual_str
 	    : "null");
 	fprintf(stderr, " overlay:    %d\n", overlay);
@@ -1270,6 +1271,8 @@ int main(int argc, char* argv[]) {
 		} else if (!strcmp(arg, "-overlay_yescursor")) {
 			overlay = 1;
 			overlay_cursor = 2;
+		} else if (!strcmp(arg, "-8to24")) {
+			cmap8to24 = 1;
 		} else if (!strcmp(arg, "-visual")) {
 			CHECK_ARGC
 			visual_str = strdup(argv[++i]);

x11vnc/x11vnc.h

@@ -315,6 +315,7 @@ extern char *main_fb;			/* our copy of the X11 fb */
 extern char *rfb_fb;			/* same as main_fb unless transformation */
 extern char *fake_fb;		/* used under -padgeom */
 extern char *snap_fb;		/* used under -snapfb */
+extern char *cmap8to24_fb;	/* used under -8to24 */
 extern char *raw_fb;
 extern char *raw_fb_addr;
 extern int raw_fb_offset;

x11vnc/x11vnc_defs.c

@@ -15,7 +15,7 @@ int xtrap_base_event_type = 0;
 int xdamage_base_event_type = 0;
 
 /*               date +'lastmod: %Y-%m-%d' */
-char lastmod[] = "0.8 lastmod: 2006-01-11";
+char lastmod[] = "0.8 lastmod: 2006-01-14";
 
 /* X display info */
 
@@ -57,6 +57,7 @@ char *main_fb = NULL;		/* our copy of the X11 fb */
 char *rfb_fb = NULL;		/* same as main_fb unless transformation */
 char *fake_fb = NULL;		/* used under -padgeom */
 char *snap_fb = NULL;		/* used under -snapfb */
+char *cmap8to24_fb = NULL;	/* used under -8to24 */
 char *raw_fb = NULL;
 char *raw_fb_addr = NULL;
 int raw_fb_offset = 0;