/* -- screen.c -- */

#include "x11vnc.h"
#include "xevents.h"
#include "xwrappers.h"
#include "xinerama.h"
#include "xdamage.h"
#include "win_utils.h"
#include "cleanup.h"
#include "userinput.h"
#include "scan.h"
#include "user.h"
#include "rates.h"
#include "pointer.h"
#include "keyboard.h"
#include "cursor.h"
#include "connections.h"
#include "remote.h"
#include "unixpw.h"
#include "sslcmds.h"
#include "sslhelper.h"
#include "v4l.h"
#include "linuxfb.h"
#include "macosx.h"
#include "macosxCG.h"
#include "avahi.h"
#include "solid.h"
#include "inet.h"
#include "xrandr.h"
#include "xrecord.h"
#include "pm.h"

#include <rfb/rfbclient.h>

void set_greyscale_colormap(void);
void set_hi240_colormap(void);
void unset_colormap(void);
void set_colormap(int reset);
void set_nofb_params(int restore);
void set_raw_fb_params(int restore);
void do_new_fb(int reset_mem);
void free_old_fb(void);
void check_padded_fb(void);
void install_padded_fb(char *geom);
XImage *initialize_xdisplay_fb(void);
void parse_scale_string(char *str, double *factor_x, double *factor_y, int *scaling, int *blend,
    int *nomult4, int *pad, int *interpolate, int *numer, int *denom, int w_in, int h_in);
int parse_rotate_string(char *str, int *mode);
int scale_round(int len, double fac);
void initialize_screen(int *argc, char **argv, XImage *fb);
void set_vnc_desktop_name(void);
void announce(int lport, int ssl, char *iface);

char *vnc_reflect_guess(char *str, char **raw_fb_addr);
void vnc_reflect_process_client(void);
rfbBool vnc_reflect_send_pointer(int x, int y, int mask);
rfbBool vnc_reflect_send_key(uint32_t key, rfbBool down);
rfbBool vnc_reflect_send_cuttext(char *str, int len);

static void debug_colormap(XImage *fb);
static void set_visual(char *str);
static void nofb_hook(rfbClientPtr cl);
static void remove_fake_fb(void);
static void install_fake_fb(int w, int h, int bpp);
static void initialize_snap_fb(void);
XImage *initialize_raw_fb(int);
static void initialize_clipshift(void);
static int wait_until_mapped(Window win);
static void setup_scaling(int *width_in, int *height_in);

static void check_filexfer(void);
static void record_last_fb_update(void);
static void check_cursor_changes(void);
static int choose_delay(double dt);

int rawfb_reset = -1;
int rawfb_dev_video = 0;
int rawfb_vnc_reflect = 0;

/*
 * X11 and rfb display/screen related routines
 */

/*
 * Some handling of 8bpp PseudoColor colormaps.  Called for initializing
 * the clients and dynamically if -flashcmap is specified.
 */
#define NCOLOR 256

/* this is only for rawfb */
void set_greyscale_colormap(void) {
	int i;
	if (! screen) {
		return;
	}
	if (screen->colourMap.data.shorts) {
		free(screen->colourMap.data.shorts);
		screen->colourMap.data.shorts = NULL;
	}

if (0) fprintf(stderr, "set_greyscale_colormap: %s\n", raw_fb_pixfmt);
	screen->colourMap.count = NCOLOR;
	screen->serverFormat.trueColour = FALSE;
	screen->colourMap.is16 = TRUE;
	screen->colourMap.data.shorts = (unsigned short *)
		malloc(3*sizeof(unsigned short) * NCOLOR);

	for(i = 0; i < NCOLOR; i++) {
		unsigned short lvl = i * 256;

		screen->colourMap.data.shorts[i*3+0] = lvl;
		screen->colourMap.data.shorts[i*3+1] = lvl;
		screen->colourMap.data.shorts[i*3+2] = lvl;
	}

	rfbSetClientColourMaps(screen, 0, NCOLOR);
}

/* this is specific to bttv rf tuner card */
void set_hi240_colormap(void) {
	int i;
	if (! screen) {
		return;
	}
if (0) fprintf(stderr, "set_hi240_colormap: %s\n", raw_fb_pixfmt);
	if (screen->colourMap.data.shorts) {
		free(screen->colourMap.data.shorts);
		screen->colourMap.data.shorts = NULL;
	}

	screen->colourMap.count = 256;
	screen->serverFormat.trueColour = FALSE;
	screen->colourMap.is16 = TRUE;
	screen->colourMap.data.shorts = (unsigned short *)
		calloc(3*sizeof(unsigned short) * 256, 1);

	for(i = 0; i < 225; i++) {
		int r, g, b;

		r = ( (i/5) % 5 ) * 255.0 / 4 + 0.5;
		g = ( (i/25)    ) * 255.0 / 8 + 0.5;
		b = ( i % 5     ) * 255.0 / 4 + 0.5;

		screen->colourMap.data.shorts[(i+16)*3+0] = (unsigned short) (r * 256);
		screen->colourMap.data.shorts[(i+16)*3+1] = (unsigned short) (g * 256);
		screen->colourMap.data.shorts[(i+16)*3+2] = (unsigned short) (b * 256);
	}

	rfbSetClientColourMaps(screen, 0, 256);
}

/* this is only for rawfb */
void unset_colormap(void) {
	if (! screen) {
		return;
	}
	if (screen->colourMap.data.shorts) {
		free(screen->colourMap.data.shorts);
		screen->colourMap.data.shorts = NULL;
	}
	screen->serverFormat.trueColour = TRUE;
if (0) fprintf(stderr, "unset_colormap: %s\n", raw_fb_pixfmt);
}

/* this is X11 case */
void set_colormap(int reset) {

#if NO_X11
	if (!reset) {}
	return;
#else
	static int init = 1;
	static XColor *color = NULL, *prev = NULL;
	static int ncolor = 0;
	Colormap cmap;
	Visual *vis;
	int i, ncells, diffs = 0;

	if (reset) {
		init = 1;
		ncolor = 0;
		if (screen->colourMap.data.shorts) {
			free(screen->colourMap.data.shorts);
			screen->colourMap.data.shorts = NULL;
		}
		if (color) {
			free(color);
			color = NULL;
		}
		if (prev) {
			free(prev);
			prev = NULL;
		}
	}

	if (init) {
		if (depth > 16) {
			ncolor = NCOLOR;
		} else if (depth > 8) {
			ncolor = 1 << depth;
		} else {
			ncolor = NCOLOR;
		}
		screen->colourMap.count = ncolor;
		screen->serverFormat.trueColour = FALSE;
		screen->colourMap.is16 = TRUE;
		screen->colourMap.data.shorts = (unsigned short *)
			malloc(3*sizeof(unsigned short) * ncolor);
	}
	if (color == NULL) {
		color = (XColor *) calloc(ncolor * sizeof(XColor), 1);
		prev  = (XColor *) calloc(ncolor * sizeof(XColor), 1);
	}

	for (i=0; i < ncolor; i++) {
		prev[i].red   = color[i].red;
		prev[i].green = color[i].green;
		prev[i].blue  = color[i].blue;
	}

	RAWFB_RET_VOID

	X_LOCK;

	cmap = DefaultColormap(dpy, scr);
	ncells = CellsOfScreen(ScreenOfDisplay(dpy, scr));
	vis = default_visual;

	if (subwin) {
		XWindowAttributes attr;

		if (XGetWindowAttributes(dpy, window, &attr)) {
			cmap = attr.colormap;
			vis = attr.visual;
			ncells = vis->map_entries;
		}
	}

	if (ncells != ncolor) {
		if (! shift_cmap) {
			screen->colourMap.count = ncells;
		}
	}
	if (init && ! quiet) {
		rfbLog("set_colormap: number of cells: %d, "
		    "ncolor(%d) is %d.\n", ncells, depth, ncolor);
	}

	if (flash_cmap && ! init) {
		XWindowAttributes attr;
		Window c;
		int tries = 0;

		c = window;
		while (c && tries++ < 16) {
			c = query_pointer(c);
			if (valid_window(c, &attr, 0)) {
				if (attr.colormap && attr.map_installed) {
					cmap = attr.colormap;
					vis = attr.visual;
					ncells = vis->map_entries;
					break;
				}
			} else {
				break;
			}
		}
	}
	if (ncells > ncolor && ! quiet) {
		rfbLog("set_colormap: big problem: ncells=%d > %d\n",
		    ncells, ncolor);
	}

	if (vis->class == TrueColor || vis->class == DirectColor) {
		/*
		 * Kludge to make 8bpp TrueColor & DirectColor be like
		 * the StaticColor map.  The ncells = 8 is "8 per subfield"
		 * mentioned in xdpyinfo.  Looks OK... perhaps fortuitously.
		 */
		if (ncells == 8 && ! shift_cmap) {
			ncells = ncolor;
		}
	}

	for (i=0; i < ncells; i++) {
		color[i].pixel = i;
		color[i].pad = 0;
	}

	XQueryColors(dpy, cmap, color, ncells);

	X_UNLOCK;

	for(i = ncells - 1; i >= 0; i--) {
		int k = i + shift_cmap;

		screen->colourMap.data.shorts[i*3+0] = color[i].red;
		screen->colourMap.data.shorts[i*3+1] = color[i].green;
		screen->colourMap.data.shorts[i*3+2] = color[i].blue;

		if (prev[i].red   != color[i].red ||
		    prev[i].green != color[i].green || 
		    prev[i].blue  != color[i].blue ) {
			diffs++;
		}

		if (shift_cmap && k >= 0 && k < ncolor) {
			/* kludge to copy the colors to higher pixel values */
			screen->colourMap.data.shorts[k*3+0] = color[i].red;
			screen->colourMap.data.shorts[k*3+1] = color[i].green;
			screen->colourMap.data.shorts[k*3+2] = color[i].blue;
		}
	}

	if (diffs && ! init) {
		if (! all_clients_initialized()) {
			rfbLog("set_colormap: warning: sending cmap "
			    "with uninitialized clients.\n");
		}
		if (shift_cmap) {
			rfbSetClientColourMaps(screen, 0, ncolor);
		} else {
			rfbSetClientColourMaps(screen, 0, ncells);
		}
	}

	init = 0;
#endif	/* NO_X11 */
}

static void debug_colormap(XImage *fb) {
	static int debug_cmap = -1;
	int i, k, *histo;
	int ncolor;

	if (debug_cmap < 0) {
		if (getenv("DEBUG_CMAP") != NULL) {
			debug_cmap = 1;
		} else {
			debug_cmap = 0;
		}
	}
	if (! debug_cmap) {
		return;
	}
	if (! fb) {
		return;
	}
	if (fb->bits_per_pixel > 16) {
		return;
	}
	ncolor = screen->colourMap.count;
	histo = (int *) calloc(ncolor * sizeof(int), 1);

	for (i=0; i < ncolor; i++) {
		histo[i] = 0;
	}
	for (k = 0; k < fb->width * fb->height; k++) {
		unsigned char n;
		char c = *(fb->data + k);

		n = (unsigned char) c;
		histo[n]++;
	}
	fprintf(stderr, "\nColormap histogram for current screen contents:\n");
	for (i=0; i < ncolor; i++) {
		unsigned short r = screen->colourMap.data.shorts[i*3+0];
		unsigned short g = screen->colourMap.data.shorts[i*3+1];
		unsigned short b = screen->colourMap.data.shorts[i*3+2];

		fprintf(stderr, "   %03d: %7d %04x/%04x/%04x", i, histo[i],
		    r, g, b);
		if ((i+1) % 2 == 0)  {
			fprintf(stderr, "\n");
		}
	}
	free(histo);
	fprintf(stderr, "\n");
}

/*
 * Experimental mode to force the visual of the window instead of querying
 * it.  Used for testing, overriding some rare cases (win2vnc), and for
 * -overlay .  Input string can be a decimal or 0x hex or something like
 * TrueColor or TrueColor:24 to force a depth as well.
 *
 * visual_id and possibly visual_depth are set.
 */
static void set_visual(char *str) {
#if NO_X11
	RAWFB_RET_VOID
	if (!str) {}
	return;
#else
	int vis, vdepth, defdepth;
	XVisualInfo vinfo;
	char *p, *vstring = strdup(str);

	RAWFB_RET_VOID

	defdepth = DefaultDepth(dpy, scr);
	visual_id = (VisualID) 0;
	visual_depth = 0;

	if (!strcmp(vstring, "ignore") || !strcmp(vstring, "default")
	    || !strcmp(vstring, "")) {
		free(vstring);
		return;
	}

	/* set visual depth */
	if ((p = strchr(vstring, ':')) != NULL) {
		visual_depth = atoi(p+1);
		*p = '\0';
		vdepth = visual_depth;
	} else {
		vdepth = defdepth; 
	}
	if (! quiet) {
		fprintf(stderr, "\nVisual Info:\n");
		fprintf(stderr, " set_visual(\"%s\")\n", str);
		fprintf(stderr, " visual_depth: %d\n", vdepth);
	}

	/* set visual id number */
	if (strcmp(vstring, "StaticGray") == 0) {
		vis = StaticGray;
	} else if (strcmp(vstring, "GrayScale") == 0) {
		vis = GrayScale;
	} else if (strcmp(vstring, "StaticColor") == 0) {
		vis = StaticColor;
	} else if (strcmp(vstring, "PseudoColor") == 0) {
		vis = PseudoColor;
	} else if (strcmp(vstring, "TrueColor") == 0) {
		vis = TrueColor;
	} else if (strcmp(vstring, "DirectColor") == 0) {
		vis = DirectColor;
	} else {
		unsigned int v_in;
		if (sscanf(vstring, "0x%x", &v_in) != 1) {
			if (sscanf(vstring, "%u", &v_in) == 1) {
				visual_id = (VisualID) v_in;
				return;
			}
			rfbLogEnable(1);
			rfbLog("invalid -visual arg: %s\n", vstring);
			X_UNLOCK;
			clean_up_exit(1);
		}
		visual_id = (VisualID) v_in;
		free(vstring);
		return;
	}

	if (! quiet) fprintf(stderr, " visual: %d\n", vis);
	if (XMatchVisualInfo(dpy, scr, visual_depth, vis, &vinfo)) {
		;
	} else if (XMatchVisualInfo(dpy, scr, defdepth, vis, &vinfo)) {
		;
	} else {
		rfbLogEnable(1);
		rfbLog("could not find visual: %s\n", vstring);
		X_UNLOCK;
		clean_up_exit(1);
	}
	free(vstring);

	/* set numerical visual id. */
	visual_id = vinfo.visualid;
#endif	/* NO_X11 */
}

void set_nofb_params(int restore) {
	static int first = 1;
	static int save[100];
	static char *scroll = NULL;
	int i = 0;

	if (first) {
		first = 0;
		save[i++] = use_xfixes;
		save[i++] = use_xdamage;
		save[i++] = use_xrecord;
		save[i++] = wireframe;
		save[i++] = use_solid_bg;
		save[i++] = overlay;
		save[i++] = overlay_cursor;
		save[i++] = using_shm;
		save[i++] = single_copytile;
		save[i++] = take_naps;
		save[i++] = measure_speeds;
		save[i++] = grab_buster;
		save[i++] = show_cursor;
		save[i++] = cursor_shape_updates;
		save[i++] = cursor_pos_updates;
		save[i++] = ncache;

		scroll = scroll_copyrect;
	}
	if (restore) {
		i = 0;
		use_xfixes            = save[i++];
		use_xdamage           = save[i++];
		use_xrecord           = save[i++];
		wireframe             = save[i++];
		use_solid_bg          = save[i++];
		overlay               = save[i++];
		overlay_cursor        = save[i++];
		using_shm             = save[i++];
		single_copytile       = save[i++];
		take_naps             = save[i++];
		measure_speeds        = save[i++];
		grab_buster           = save[i++];
		show_cursor           = save[i++];
		cursor_shape_updates  = save[i++];
		cursor_pos_updates    = save[i++];
		ncache                = save[i++];

		scroll_copyrect = scroll;

		if (cursor_shape_updates) {
			restore_cursor_shape_updates(screen);
		}
		initialize_cursors_mode();

		return;
	}

	use_xfixes = 0;
	use_xdamage = 0;
	use_xrecord = 0;
	wireframe = 0;

	use_solid_bg = 0;
	overlay = 0;
	overlay_cursor = 0;

	using_shm = 0;
	single_copytile = 1;

	take_naps = 0;
	measure_speeds = 0;

	/* got_grab_buster? */
	grab_buster = 0;

	show_cursor = 0;
	show_multiple_cursors = 0;
	cursor_shape_updates = 0;
	if (! got_cursorpos) {
		cursor_pos_updates = 0;
	}

	ncache = 0;

	scroll_copyrect = "never";

	if (! quiet) {
		rfbLog("disabling: xfixes, xdamage, solid, overlay, shm,\n");
		rfbLog("  wireframe, scrollcopyrect, ncache,\n");
		rfbLog("  noonetile, nap, cursor, %scursorshape\n",
		    got_cursorpos ? "" : "cursorpos, " );
		rfbLog("  in -nofb mode.\n");
	}
}

static char *raw_fb_orig_dpy = NULL;

void set_raw_fb_params(int restore) {
	static int first = 1;
	static int vo0, us0, sm0, ws0, wp0, wc0, wb0, na0, tn0;  
	static int xr0, xrm0, sb0, re0;
	static char *mc0;

	/*
	 * set turn off a bunch of parameters not compatible with 
	 * -rawfb mode: 1) ignoring the X server 2) ignoring user input. 
	 */
	
	if (first) {
		/* at least save the initial settings... */
		vo0 = view_only;
		ws0 = watch_selection;
		wp0 = watch_primary;
		wc0 = watch_clipboard;
		wb0 = watch_bell;
		na0 = no_autorepeat;
		sb0 = use_solid_bg;

		us0 = use_snapfb;
		sm0 = using_shm;
		tn0 = take_naps;
		xr0 = xrandr;
		xrm0 = xrandr_maybe;
		re0 = noxrecord;
		mc0 = multiple_cursors_mode;

		first = 0;
	}

	if (restore) {
		view_only = vo0;
		watch_selection = ws0;
		watch_primary = wp0;
		watch_clipboard = wc0;
		watch_bell = wb0;
		no_autorepeat = na0;
		use_solid_bg = sb0;

		use_snapfb = us0;
		using_shm = sm0;
		take_naps = tn0;
		xrandr = xr0;
		xrandr_maybe = xrm0;
		noxrecord = re0;
		multiple_cursors_mode = mc0;

		if (! dpy && raw_fb_orig_dpy) {
			dpy = XOpenDisplay_wr(raw_fb_orig_dpy);
			if (dpy) {
				if (! quiet) rfbLog("reopened DISPLAY: %s\n",
				    raw_fb_orig_dpy);
				scr = DefaultScreen(dpy);
				rootwin = RootWindow(dpy, scr);
				check_xevents(1);
			} else {
				if (! quiet) rfbLog("WARNING: failed to reopen "
				    "DISPLAY: %s\n", raw_fb_orig_dpy);
			}
		}
		return;
	}

	if (verbose) {
		rfbLog("set_raw_fb_params: modifying settings for "
		    "-rawfb mode.\n");
	}

	if (got_noviewonly) {
		/*
		 * The user input parameters are not unset under
		 * -noviewonly... this usage should be very rare
		 * (i.e. rawfb but also send user input to the X
		 * display, most likely using /dev/fb0 for some reason...)
		 */
		if (verbose) {
		   rfbLog("rawfb: -noviewonly mode: still sending mouse and\n");
		   rfbLog("rawfb:   keyboard input to the X DISPLAY!!\n");
		}
	} else {
		/* Normal case: */
#if 0
		if (! view_only && ! pipeinput_str) {
			if (! quiet) rfbLog("  rawfb: setting view_only\n");
			view_only = 1;
		}
#endif
		if (raw_fb_str && strstr(raw_fb_str, "vnc") == raw_fb_str) {
			;
		} else if (watch_selection) {
			if (verbose) rfbLog("  rawfb: turning off "
			    "watch_selection\n");
			watch_selection = 0;
		}
		if (watch_primary) {
			if (verbose) rfbLog("  rawfb: turning off "
			    "watch_primary\n");
			watch_primary = 0;
		}
		if (watch_clipboard) {
			if (verbose) rfbLog("  rawfb: turning off "
			    "watch_clipboard\n");
			watch_clipboard = 0;
		}
		if (watch_bell) {
			if (verbose) rfbLog("  rawfb: turning off watch_bell\n");
			watch_bell = 0;
		}
		if (no_autorepeat) {
			if (verbose) rfbLog("  rawfb: turning off "
			    "no_autorepeat\n");
			no_autorepeat = 0;
		}
		if (use_solid_bg) {
			if (verbose) rfbLog("  rawfb: turning off "
			    "use_solid_bg\n");
			use_solid_bg = 0;
		}
#ifndef MACOSX
		if (raw_fb_str && strstr(raw_fb_str, "vnc") == raw_fb_str) {
			;
		} else {
			multiple_cursors_mode = strdup("arrow");
		}
#endif
	}
	if (using_shm) {
		if (verbose) rfbLog("  rawfb: turning off using_shm\n");
		using_shm = 0;
	}
	if (take_naps) {
		if (verbose) rfbLog("  rawfb: turning off take_naps\n");
		take_naps = 0;
	}
	if (xrandr) {
		if (verbose) rfbLog("  rawfb: turning off xrandr\n");
		xrandr = 0;
	}
	if (xrandr_maybe) {
		if (verbose) rfbLog("  rawfb: turning off xrandr_maybe\n");
		xrandr_maybe = 0;
	}
	if (! noxrecord) {
		if (verbose) rfbLog("  rawfb: turning off xrecord\n");
		noxrecord = 1;
	}
}

/*
 * Presumably under -nofb the clients will never request the framebuffer.
 * However, we have gotten such a request... so let's just give them
 * the current view on the display.  n.b. x2vnc and perhaps win2vnc
 * requests a 1x1 pixel for some workaround so sadly this evidently
 * nearly always happens.
 */
static void nofb_hook(rfbClientPtr cl) {
	XImage *fb;
	XImage raw;

	rfbLog("framebuffer requested in -nofb mode by client %s\n", cl->host);
	/* ignore xrandr */

	if (raw_fb && ! dpy) {
		fb = &raw;
		fb->data = (char *)malloc(32);
	} else {
		int use_real_ximage = 0;
		if (use_real_ximage) {
			fb = XGetImage_wr(dpy, window, 0, 0, dpy_x, dpy_y, AllPlanes, ZPixmap);
		} else {
			fb = &raw;
			fb->data = (char *) calloc(dpy_x*dpy_y*bpp/8, 1);
		}
	}
	main_fb = fb->data;
	rfb_fb = main_fb;
	screen->frameBuffer = rfb_fb;
	screen->displayHook = NULL;
}

void free_old_fb(void) {
	char *fbs[16];
	int i, j, nfb = 0, db = 0; 

	fbs[nfb++] = main_fb;		main_fb = NULL;
	fbs[nfb++] = rfb_fb;		rfb_fb = NULL;
	fbs[nfb++] = cmap8to24_fb;	cmap8to24_fb = NULL;
	fbs[nfb++] = snap_fb;		snap_fb = NULL;
	fbs[nfb++] = rot_fb;		rot_fb = NULL;
	fbs[nfb++] = raw_fb;		raw_fb = NULL;

	for (i=0; i < nfb; i++) {
		char *fb = fbs[i];
		int freeit = 1;
		if (! fb || fb < (char *) 0x10) {
			continue;
		}
		for (j=0; j < i; j++) {
			if (fb == fbs[j]) {
				freeit = 0;
				break;
			}
		}
		if (freeit) {
			if (db) fprintf(stderr, "free: %i %p\n", i, fb);
			free(fb);
		} else {
			if (db) fprintf(stderr, "skip: %i %p\n", i, fb);
		}
	}
}

void do_new_fb(int reset_mem) {
	XImage *fb;

	/* for threaded we really should lock libvncserver out. */
	if (use_threads) {
		rfbLog("warning: changing framebuffers while threaded may\n");
		rfbLog(" not work, do not use -threads if problems arise.\n");
	}

	if (reset_mem == 1) {
		/* reset_mem == 2 is a hack for changing users... */
		clean_shm(0);
		free_tiles();
	}

	free_old_fb();

	fb = initialize_xdisplay_fb();

	initialize_screen(NULL, NULL, fb);

	if (reset_mem) {
		initialize_tiles();
		initialize_blackouts_and_xinerama();
		initialize_polling_images();
	}
	if (ncache) {
		check_ncache(1, 0);
	}
}

static void remove_fake_fb(void) {
	if (! screen) {
		return;
	}
	rfbLog("removing fake fb: 0x%x\n", fake_fb);

	do_new_fb(1);

	/*
	 * fake_fb is freed in do_new_fb(), but we set to NULL here to
	 * indicate it is gone.
	 */
	fake_fb = NULL;
}

static void install_fake_fb(int w, int h, int bpp) {
	int bpc;
	if (! screen) {
		return;
	}
	if (fake_fb) {
		free(fake_fb);
	}
	fake_fb = (char *) calloc(w*h*bpp/8, 1);
	if (! fake_fb) {
		rfbLog("could not create fake fb: %dx%d %d\n", w, h, bpp);
		return;
	}
	bpc = guess_bits_per_color(bpp);
	rfbLog("installing fake fb: %dx%d %d\n", w, h, bpp);
	rfbLog("rfbNewFramebuffer(0x%x, 0x%x, %d, %d, %d, %d, %d)\n",
	    screen, fake_fb, w, h, bpc, 1, bpp/8);

	rfbNewFramebuffer(screen, fake_fb, w, h, bpc, 1, bpp/8);
}

void check_padded_fb(void) {
	if (! fake_fb) {
		return;
	}
	if (unixpw_in_progress) return;

	if (time(NULL) > pad_geometry_time+1 && all_clients_initialized()) {
		remove_fake_fb();
	}
}

void install_padded_fb(char *geom) {
	int w, h;
	int ok = 1;
	if (! geom || *geom == '\0') {
		ok = 0;
	} else if (sscanf(geom, "%dx%d", &w, &h) != 2)  {
		ok = 0;
	}
	w = nabs(w);
	h = nabs(h);

	if (w < 5) w = 5;
	if (h < 5) h = 5;

	if (!ok) {
		rfbLog("skipping invalid pad geometry: '%s'\n", NONUL(geom));
		return;
	}
	install_fake_fb(w, h, bpp);
	pad_geometry_time = time(NULL);
}

static void initialize_snap_fb(void) {
	RAWFB_RET_VOID
	if (snap_fb) {
		free(snap_fb);
	}
	snap = XGetImage_wr(dpy, window, 0, 0, dpy_x, dpy_y, AllPlanes,
	    ZPixmap);
	snap_fb = snap->data;
}

static rfbClient* client = NULL;

void vnc_reflect_bell(rfbClient *cl) {
	if (cl) {}
	if (sound_bell) {
		if (unixpw_in_progress) {
			return;
		}
		if (! all_clients_initialized()) {
			rfbLog("vnc_reflect_bell: not sending bell: "
			    "uninitialized clients\n");
		} else {
			if (screen && client_count) {
				rfbSendBell(screen);
			}
		}
	}
}

void vnc_reflect_recv_cuttext(rfbClient *cl, const char *str, int len) {
	if (cl) {}
	if (unixpw_in_progress) {
		return;
	}
	if (! watch_selection) {
		return;
	}
	if (! all_clients_initialized()) {
		rfbLog("vnc_reflect_recv_cuttext: no send: uninitialized clients\n");
		return; /* some clients initializing, cannot send */ 
	}
	rfbSendServerCutText(screen, (char *)str, len);
}

void vnc_reflect_got_update(rfbClient *cl, int x, int y, int w, int h) {
	if (cl) {}
	if (use_xdamage) {
		static int first = 1;
		if (first) {
			collect_non_X_xdamage(-1, -1, -1, -1, 0);
			first = 0;
		}
		collect_non_X_xdamage(x, y, w, h, 1);
	}
}

void vnc_reflect_got_cursorshape(rfbClient *cl, int xhot, int yhot, int width, int height, int bytesPerPixel) {
	static int serial = 1;
	int i, j;
	char *pixels = NULL;
	unsigned long r, g, b;
	unsigned int ui = 0;
	unsigned long red_mask, green_mask, blue_mask;

	if (cl) {}
	if (unixpw_in_progress) {
		return;
	}
	if (! all_clients_initialized()) {
		rfbLog("vnc_reflect_got_copyshape: no send: uninitialized clients\n");
		return; /* some clients initializing, cannot send */ 
	}
	if (! client->rcSource) {
		return;
	}
	if (bytesPerPixel != 1 && bytesPerPixel != 2 && bytesPerPixel != 4) {
		return;
	}

	red_mask   = (client->format.redMax   << client->format.redShift);
	green_mask = (client->format.greenMax << client->format.greenShift);
	blue_mask  = (client->format.blueMax  << client->format.blueShift);

	pixels = (char *)malloc(4*width*height);
	for (j=0; j<height; j++) {
		for (i=0; i<width; i++) {
			unsigned int* uip;
			unsigned char* uic;
			int m;
			if (bytesPerPixel == 1) {
				unsigned char* p = (unsigned char *) client->rcSource;
				ui = (unsigned long) *(p + j * width + i);
			} else if (bytesPerPixel == 2) {
				unsigned short* p = (unsigned short *) client->rcSource;
				ui = (unsigned long) *(p + j * width + i);
			} else if (bytesPerPixel == 4) {
				unsigned int* p = (unsigned int *) client->rcSource;
				ui = (unsigned long) *(p + j * width + i);
			}
			r = (red_mask   & ui) >> client->format.redShift;
			g = (green_mask & ui) >> client->format.greenShift;
			b = (blue_mask  & ui) >> client->format.blueShift;

			r = (255 * r) / client->format.redMax;
			g = (255 * g) / client->format.greenMax;
			b = (255 * b) / client->format.blueMax;

			ui = (r << 16 | g << 8 | b << 0) ;

			uic = (unsigned char *)client->rcMask;
			m = (int) *(uic + j * width + i);
			if (m) {
				ui |= 0xff000000;
			}
			uip = (unsigned int *)pixels;
			*(uip + j * width + i) = ui;
		}
	}

	store_cursor(serial++, (unsigned long*) pixels, width, height, 32, xhot, yhot);
	free(pixels);
	set_cursor(cursor_x, cursor_y, get_which_cursor());
}

void vnc_reflect_got_copyrect(rfbClient *cl, int src_x, int src_y, int w, int h, int dest_x, int dest_y) {
	sraRegionPtr reg;
	int dx, dy, rc = -1;
	static int last_dx = 0, last_dy = 0;
	if (cl) {}
	if (unixpw_in_progress) {
		return;
	}
	if (! all_clients_initialized()) {
		rfbLog("vnc_reflect_got_copyrect: no send: uninitialized clients\n");
		return; /* some clients initializing, cannot send */ 
	}
	dx = dest_x - src_x;
	dy = dest_y - src_y;
	if (dx != last_dx || dy != last_dy) {
		rc = fb_push_wait(0.05, FB_COPY|FB_MOD);
	}
	if (0) fprintf(stderr, "vnc_reflect_got_copyrect: %dx%d+%d+%d   %d %d  rc=%d\n", dest_x, dest_y, w, h, dx, dy, rc);
	reg = sraRgnCreateRect(dest_x, dest_y, dest_x + w, dest_y + h);
	do_copyregion(reg, dx, dy, 0);
	sraRgnDestroy(reg);

	last_dx = dx;
	last_dy = dy;
}

rfbBool vnc_reflect_resize(rfbClient *cl)  {
	static int first = 1;
	if(cl->frameBuffer) {
		free(cl->frameBuffer);
	}
	cl->frameBuffer= malloc(cl->width * cl->height * cl->format.bitsPerPixel/8);
	if (!first) {
		do_new_fb(1);
	}
	first = 0;
	return cl->frameBuffer ? TRUE : FALSE;
}

char *vnc_reflect_guess(char *str, char **raw_fb_addr) {

	static int first = 1;
	char *hp = str + strlen("vnc:");
	char *at = NULL;
	int argc = 0, i;
	char *argv[16];
	char str2[256];
	char *str0 = strdup(str);

	if (client == NULL) {
		client = rfbGetClient(8, 3, 4);
	}

	rfbLog("rawfb: %s\n", str);

	at = strchr(hp, '@');
	if (at) {
		*at = '\0';
		at++;
	}

	client->appData.useRemoteCursor = TRUE;
	client->Bell = vnc_reflect_bell;
	client->GotXCutText = vnc_reflect_recv_cuttext;
	client->GotCopyRect = vnc_reflect_got_copyrect;
	client->GotCursorShape = vnc_reflect_got_cursorshape;
	client->MallocFrameBuffer = vnc_reflect_resize;
	client->canHandleNewFBSize = TRUE;
	client->GotFrameBufferUpdate = vnc_reflect_got_update;

	if (first) {
		argv[argc++] = "x11vnc_rawfb_vnc";
		if (strstr(hp, "listen") == hp) {
			char *q = strchr(hp, ':');
			argv[argc++] = strdup("-listen");
			if (q) {
				client->listenPort = atoi(q+1);
			} else {
				client->listenPort = LISTEN_PORT_OFFSET;
			}
		} else {
			argv[argc++] = strdup(hp);
		}

		if (! rfbInitClient(client, &argc, argv)) {
			rfbLog("vnc_reflector failed for: %s\n", str0);
			clean_up_exit(1);
		}
	}

	if (at) {
		sprintf(str2, "map:/dev/null@%s", at);
	} else {
		unsigned long red_mask, green_mask, blue_mask;
		red_mask   = (client->format.redMax   << client->format.redShift);
		green_mask = (client->format.greenMax << client->format.greenShift);
		blue_mask  = (client->format.blueMax  << client->format.blueShift);
		sprintf(str2, "map:/dev/null@%dx%dx%d:0x%lx/0x%lx/0x%lx",
		    client->width, client->height, client->format.bitsPerPixel,
		    red_mask, green_mask, blue_mask);
	}
	*raw_fb_addr = (char *) client->frameBuffer;
	free(str0);

	if (first) {
		setup_cursors_and_push();

		for (i=0; i<10; i++) {
			vnc_reflect_process_client();
		}
	}
	first = 0;

	return strdup(str2);
}

rfbBool vnc_reflect_send_pointer(int x, int y, int mask) {
	int rc;
	if (mask >= 0) {
		got_user_input++;
		got_pointer_input++;
		last_pointer_time = time(NULL);
	}

	if (cursor_x != x || cursor_y != y) {
		last_pointer_motion_time = dnow();
	}

	cursor_x = x;
	cursor_y = y;

	/* record the x, y position for the rfb screen as well. */
	cursor_position(x, y);

	/* change the cursor shape if necessary */
	rc = set_cursor(x, y, get_which_cursor());
	cursor_changes += rc;

	return SendPointerEvent(client, x, y, mask);
}

rfbBool vnc_reflect_send_key(uint32_t key, rfbBool down) {
	return SendKeyEvent(client, key, down);
}

rfbBool vnc_reflect_send_cuttext(char *str, int len) {
	return SendClientCutText(client, str, len);
}

void vnc_reflect_process_client(void) {
	int num;
	if (client == NULL) {
		return;
	}
	num = WaitForMessage(client, 1000);
	if (num > 0) {
		if (!HandleRFBServerMessage(client)) {
			rfbLog("vnc_reflect_process_client: read failure to server\n");
			shut_down = 1;
		}
	}
}

void linux_dev_fb_msg(char* q) {
	if (strstr(q, "/dev/fb") && strstr(UT.sysname, "Linux")) {
		rfbLog("\n");
		rfbLog("On Linux you may need to load a kernel module to enable\n");
		rfbLog("the framebuffer device /dev/fb*; e.g.:\n");
		rfbLog("   vga=0x303 (and others) kernel boot parameter\n");
		rfbLog("   modprobe uvesafb\n");
		rfbLog("   modprobe radeonfb (card specific)\n");
		rfbLog("   modprobe nvidiafb (card specific, others)\n");
		rfbLog("   modprobe vesafb (?)\n");
		rfbLog("   modprobe vga16fb\n");
		rfbLog("\n");
		rfbLog("You may also need root permission to open /dev/fb*\n");
		rfbLog("and/or /dev/tty*.\n");
		rfbLog("\n");
	}
}

#define RAWFB_MMAP 1
#define RAWFB_FILE 2
#define RAWFB_SHM  3

XImage *initialize_raw_fb(int reset) {
	char *str, *q;
	int w, h, b, shmid = 0;
	unsigned long rm = 0, gm = 0, bm = 0, tm;
	static XImage ximage_struct;	/* n.b.: not (XImage *) */
	static XImage ximage_struct_snap;
	int closedpy = 1, i, m, db = 0;
	int do_macosx = 0;
	int do_reflect = 0;
	char *unlink_me = NULL;

	static char *last_file = NULL;
	static int last_mode = 0;

	if (reset && last_mode) {
		int fd;
		if (last_mode != RAWFB_MMAP && last_mode != RAWFB_FILE) {
			return NULL;
		}
		if (last_mode == RAWFB_MMAP) {
			munmap(raw_fb_addr, raw_fb_mmap);
		}
		if (raw_fb_fd >= 0) {
			close(raw_fb_fd);
		}
		raw_fb_fd = -1;
if (db) fprintf(stderr, "initialize_raw_fb reset\n");
			
		fd = -1;
		if (rawfb_dev_video) {
			fd = open(last_file, O_RDWR);
		}
		if (fd < 0) {
			fd = open(last_file, O_RDONLY);
		}
		if (fd < 0) {
			rfbLogEnable(1);
			rfbLog("failed to rawfb file: %s\n", last_file);
			rfbLogPerror("open");
			clean_up_exit(1);
		}
		raw_fb_fd = fd;
		if (last_mode == RAWFB_MMAP) {
			raw_fb_addr = mmap(0, raw_fb_mmap, PROT_READ,
			    MAP_SHARED, fd, 0);

			if (raw_fb_addr == MAP_FAILED || raw_fb_addr == NULL) {
				rfbLogEnable(1);
				rfbLog("failed to mmap file: %s\n", last_file);
				rfbLog("   raw_fb_addr: %p\n", raw_fb_addr);
				rfbLogPerror("mmap");
				clean_up_exit(1);
			}
		}
		return NULL;
	}

#ifdef MACOSX
	if (raw_fb_addr != NULL && macosx_console && raw_fb_addr == macosx_get_fb_addr()) {
		raw_fb_addr = NULL;
	}
#endif
	
	if (raw_fb_addr || raw_fb_seek) {
		if (raw_fb_shm) {
			shmdt(raw_fb_addr);
#if LIBVNCSERVER_HAVE_MMAP
		} else if (raw_fb_mmap) {
			munmap(raw_fb_addr, raw_fb_mmap);
			if (raw_fb_fd >= 0) {
				close(raw_fb_fd);
			}
			raw_fb_fd = -1;
#endif
		} else if (raw_fb_seek) {
			if (raw_fb_fd >= 0) {
				close(raw_fb_fd);
			}
			raw_fb_fd = -1;
		}
		raw_fb_addr = NULL;
		raw_fb_mmap = 0;
		raw_fb_seek = 0;
	}
	if (! raw_fb_str) {
		return NULL;
	}

	/* testing aliases */
	if (!strcasecmp(raw_fb_str, "NULL") || !strcasecmp(raw_fb_str, "ZERO")
	    || !strcasecmp(raw_fb_str, "NONE")) {
		raw_fb_str = strdup("map:/dev/zero@640x480x32");
	} else if (!strcasecmp(raw_fb_str, "NULLBIG") || !strcasecmp(raw_fb_str, "NONEBIG")) {
		raw_fb_str = strdup("map:/dev/zero@1024x768x32");
	}
	if (!strcasecmp(raw_fb_str, "RAND")) {
		raw_fb_str = strdup("file:/dev/urandom@128x128x16");
	} else if (!strcasecmp(raw_fb_str, "RANDBIG")) {
		raw_fb_str = strdup("file:/dev/urandom@640x480x16");
	} else if (!strcasecmp(raw_fb_str, "RANDHUGE")) {
		raw_fb_str = strdup("file:/dev/urandom@1024x768x16");
	}
	if (strstr(raw_fb_str, "solid=") == raw_fb_str) {
		char *n = raw_fb_str + strlen("solid=");
		char tmp[] = "/tmp/solid.XXXXXX";
		char str[100];
		unsigned int vals[1024], val;
		int x, y, fd, w = 1024, h = 768;
		if (strstr(n, "0x")) {
			if (sscanf(n, "0x%x", &val) != 1) {
				val = 0;
			}
		}
		if (val == 0) {
			val = get_pixel(n);
		}
		if (val == 0) {
			val = 0xFF00FF;
		}
		fd = mkstemp(tmp);
		for (y = 0; y < h; y++) {
			for (x = 0; x < w; x++) {
				vals[x] = val;
			}
			write(fd, (char *)vals, 4 * w);
		}
		close(fd);
		fd = open(tmp, O_WRONLY);
		unlink_me = strdup(tmp);
		sprintf(str, "map:%s@%dx%dx32", tmp, w, h);
		raw_fb_str = strdup(str);
	} else if (strstr(raw_fb_str, "swirl") == raw_fb_str) {
		char tmp[] = "/tmp/solid.XXXXXX";
		char str[100];
		unsigned int val[1024];
		unsigned int c1, c2, c3, c4;
		int x, y, fd, w = 1024, h = 768;
		fd = mkstemp(tmp);
		for (y = 0; y < h; y++) {
			for (x = 0; x < w; x++) {
				c1 = 0;
				c2 = ((x+y)*128)/(w+h);
				c3 = (x*128)/w;
				c4 = (y*256)/h;
				val[x] = (c1 << 24) | (c2 << 16) | (c3 << 8) | (c4 << 0);
			}
			write(fd, (char *)val, 4 * w);
		}
		close(fd);
		fd = open(tmp, O_WRONLY);
		unlink_me = strdup(tmp);
		sprintf(str, "map:%s@%dx%dx32", tmp, w, h);
		raw_fb_str = strdup(str);
	}


	if ( (q = strstr(raw_fb_str, "setup:")) == raw_fb_str) {
		FILE *pipe;
		char line[1024], *t;

		set_child_info();
		q += strlen("setup:");
		/* rawfb-setup */
		if (no_external_cmds || !cmd_ok("rawfb-setup")) {
			rfbLogEnable(1);
			rfbLog("cannot run external commands in -nocmds "
			    "mode:\n");
			rfbLog("   \"%s\"\n", q);
			rfbLog("   exiting.\n");
			clean_up_exit(1);
		}
		rfbLog("running command to setup rawfb: %s\n", q);
		close_exec_fds();
		pipe = popen(q, "r");
		if (! pipe) {
			rfbLogEnable(1);
			rfbLog("popen of setup command failed.\n");
			rfbLogPerror("popen");
			clean_up_exit(1);
		}
		line[0] = '\0';
		if (fgets(line, 1024, pipe) == NULL) {
			rfbLogEnable(1);
			rfbLog("read of setup command failed.\n");
			clean_up_exit(1);
		}
		pclose(pipe);
		str = strdup(line);
		t = str;
		while (*t != '\0') {
			if (*t == '\n') {
				*t = '\0';
			}
			t++;
		}
		rfbLog("setup command returned: %s\n", str);

	} else {
		str = strdup(raw_fb_str);
	}
	if (str[0] == '+') {
		char *t = strdup(str+1);
		free(str);
		str = t;
		closedpy = 0;
		if (! window) {
			window = rootwin;
		}
	}

	raw_fb_shm = 0;
	raw_fb_mmap = 0;
	raw_fb_seek = 0;
	raw_fb_fd = -1;
	raw_fb_addr = NULL;
	raw_fb_offset = 0;
	raw_fb_bytes_per_line = 0;
	rawfb_vnc_reflect = 0;

	last_mode = 0;
	if (last_file) {
		free(last_file);
		last_file = NULL;
	}
	if (strstr(str, "Video") == str) {
		if (pipeinput_str != NULL) {
			free(pipeinput_str);
		}
		pipeinput_str = strdup("VID");
		initialize_pipeinput();
		str[0] = 'v';
	}

	if (strstr(str, "video") == str || strstr(str, "/dev/video") == str) {
		char *str2 = v4l_guess(str, &raw_fb_fd);
		if (str2 == NULL) {
			rfbLog("v4l_guess failed for: %s\n", str);
			clean_up_exit(1);
		}
		str = str2;
		rfbLog("v4l_guess returned: %s\n", str);
		rawfb_dev_video = 1;
	} else if (strstr(str, "dev/video")) {
		rawfb_dev_video = 1;
	} else if (strstr(str, "console") == str || strstr(str, "fb") == str ||
	    strstr(str, "/dev/fb") == str || strstr(str, "vt") == str) {
		char *str2 = console_guess(str, &raw_fb_fd);
		if (str2 == NULL) {
			rfbLog("console_guess failed for: %s\n", str);
			clean_up_exit(1);
		}
		str = str2;
		rfbLog("console_guess returned: %s\n", str);
	} else if (strstr(str, "vnc:") == str) {
		char *str2 = vnc_reflect_guess(str, &raw_fb_addr);

		rawfb_vnc_reflect = 1;
		do_reflect = 1;

		str = str2;
		rfbLog("vnc_reflector set rawfb str to: %s\n", str);
		if (pipeinput_str == NULL) {
			pipeinput_str = strdup("VNC");
		}
		initialize_pipeinput();
	}

	if (closedpy && !view_only && got_noviewonly) {
		rfbLog("not closing X DISPLAY under -noviewonly option.\n");
		closedpy = 0;
		if (! window) {
			window = rootwin;
		}
	}

	if (! raw_fb_orig_dpy && dpy) {
		raw_fb_orig_dpy = strdup(DisplayString(dpy));
	}
#ifndef BOLDLY_CLOSE_DISPLAY
#define BOLDLY_CLOSE_DISPLAY 1
#endif
#if BOLDLY_CLOSE_DISPLAY
	if (closedpy) {
		if (dpy) {
			rfbLog("closing X DISPLAY: %s in rawfb mode.\n",
			    DisplayString(dpy));
			XCloseDisplay_wr(dpy);	/* yow! */
		}
		dpy = NULL;
	}
#endif

	/*
	 * -rawfb shm:163938442@640x480x32:ff/ff00/ff0000+3000
	 * -rawfb map:/path/to/file@640x480x32:ff/ff00/ff0000
	 * -rawfb file:/path/to/file@640x480x32:ff/ff00/ff0000
	 */

	if (raw_fb_full_str) {
		free(raw_fb_full_str);
	}
	raw_fb_full_str = strdup(str);


	/* +O offset */
	if ((q = strrchr(str, '+')) != NULL) {
		if (sscanf(q, "+%d", &raw_fb_offset) == 1) {
			*q = '\0';
		} else {
			raw_fb_offset = 0;
		}
	}
	/* :R/G/B masks */
	if ((q = strrchr(str, ':')) != NULL) {
		if (sscanf(q, ":%lx/%lx/%lx", &rm, &gm, &bm) == 3) {
			*q = '\0';
		} else if (sscanf(q, ":0x%lx/0x%lx/0x%lx", &rm, &gm, &bm)== 3) {
			*q = '\0';
		} else if (sscanf(q, ":%lu/%lu/%lu", &rm, &gm, &bm) == 3) {
			*q = '\0';
		} else {
			rm = 0;
			gm = 0;
			bm = 0;
		}
	}
	if ((q = strrchr(str, '@')) == NULL) {
		rfbLogEnable(1);
		rfbLog("invalid rawfb str: %s\n", str);
		clean_up_exit(1);
	}

	if (strrchr(q, '-')) {
		char *q2 = strrchr(q, '-');
		raw_fb_bytes_per_line = atoi(q2+1);
		*q2 = '\0';
	}
	/* @WxHxB */
	if (sscanf(q, "@%dx%dx%d", &w, &h, &b) != 3) {
		rfbLogEnable(1);
		rfbLog("invalid rawfb str: %s\n", str);
		clean_up_exit(1);
	}
	*q = '\0';

	if (rm == 0 && gm == 0 && bm == 0) {
		/* guess masks... */
		if (b == 24 || b == 32) {
			rm = 0xff0000;
			gm = 0x00ff00;
			bm = 0x0000ff;
		} else if (b == 16) {
			rm = 0xf800;
			gm = 0x07e0;
			bm = 0x001f;
		} else if (b == 8) {
			rm = 0x07;
			gm = 0x38;
			bm = 0xc0;
		}
	}
	/* we can fake -flipbyteorder to some degree... */
	if (flip_byte_order) {
		if (b == 24 || b == 32) {
			tm = rm;
			rm = bm;
			bm = tm;
		} else if (b == 16) {
			unsigned short s1, s2;
			s1 = (unsigned short) rm;
			s2 = ((0xff & s1) << 8) | ((0xff00 & s1) >> 8);
			rm = (unsigned long) s2;
			s1 = (unsigned short) gm;
			s2 = ((0xff & s1) << 8) | ((0xff00 & s1) >> 8);
			gm = (unsigned long) s2;
			s1 = (unsigned short) bm;
			s2 = ((0xff & s1) << 8) | ((0xff00 & s1) >> 8);
			bm = (unsigned long) s2;
		}
	}

	/* native fb stuff for bpp < 8 only */
	raw_fb_native_bpp = b;
	raw_fb_native_red_mask = rm;
	raw_fb_native_green_mask = gm;
	raw_fb_native_blue_mask = bm;
	raw_fb_native_red_shift = 100;
	raw_fb_native_green_shift = 100;
	raw_fb_native_blue_shift = 100;
	raw_fb_native_red_max = 1;
	raw_fb_native_green_max = 1;
	raw_fb_native_blue_max = 1;
	m = 1;
	for (i=0; i<32; i++)  {
		if (raw_fb_native_red_mask & m) {
			if (raw_fb_native_red_shift == 100) {
				raw_fb_native_red_shift = i;
			}
			raw_fb_native_red_max *= 2;
		}
		if (raw_fb_native_green_mask & m) {
			if (raw_fb_native_green_shift == 100) {
				raw_fb_native_green_shift = i;
			}
			raw_fb_native_green_max *= 2;
		}
		if (raw_fb_native_blue_mask & m) {
			if (raw_fb_native_blue_shift == 100) {
				raw_fb_native_blue_shift = i;
			}
			raw_fb_native_blue_max *= 2;
		}
		m = m << 1;
	}
	raw_fb_native_red_max -= 1;
	raw_fb_native_green_max -= 1;
	raw_fb_native_blue_max -= 1;

	if (b < 8) {
		/* e.g. VGA16 */
		rfbLog("raw_fb_native_bpp: %d 0x%02lx 0x%02lx 0x%02lx %d/%d/%d %d/%d/%d\n", raw_fb_native_bpp,
		    raw_fb_native_red_mask, raw_fb_native_green_mask, raw_fb_native_blue_mask,
		    raw_fb_native_red_max, raw_fb_native_green_max, raw_fb_native_blue_max,
		    raw_fb_native_red_shift, raw_fb_native_green_shift, raw_fb_native_blue_shift);
		raw_fb_expand_bytes = 1;
		b = 8;
		rm = 0x07;
		gm = 0x38;
		bm = 0xc0;
	}
	/* end of stuff for bpp < 8 */

	dpy_x = wdpy_x = w;
	dpy_y = wdpy_y = h;
	off_x = 0;
	off_y = 0;

	if (rawfb_dev_video) {
		if (b == 24) {
			rfbLog("enabling -24to32 for 24bpp video\n");
			xform24to32 = 1;
		} else {
			if (xform24to32) {
				rfbLog("disabling -24to32 for 24bpp video\n");
			}
			xform24to32 = 0;
		}
	}

	if (xform24to32) {
		if (b != 24) {
			rfbLog("warning: -24to32 mode and bpp=%d\n", b);
		}
		b = 32;
	}
	if (strstr(str, "snap:") == str) {
		use_snapfb = 1;
		str[0] = 'f'; str[1] = 'i'; str[2] = 'l'; str[3] = 'e';
	}

	if (strstr(str, "shm:") != str && strstr(str, "mmap:") != str &&
	    strstr(str, "map:") != str && strstr(str, "file:") != str) {
		/* hmmm, not following directions, see if map: applies */
		struct stat sbuf;
		if (stat(str, &sbuf) == 0) {
			char *new;
			int len = strlen("map:") + strlen(str) + 1;
			rfbLog("no type prefix: %s\n", raw_fb_str);
			rfbLog("  but file exists, so assuming: map:%s\n",
			    raw_fb_str);
			new = (char *) malloc(len);
			strcpy(new, "map:");
			strcat(new, str);
			free(str);
			str = new;
		}
	}

	if (sscanf(str, "shm:%d", &shmid) == 1) {
		/* shm:N */
#if LIBVNCSERVER_HAVE_XSHM || LIBVNCSERVER_HAVE_SHMAT
		raw_fb_addr = (char *) shmat(shmid, 0, SHM_RDONLY);
		if (! raw_fb_addr) {
			rfbLogEnable(1);
			rfbLog("failed to attach to shm: %d, %s\n", shmid, str);
			rfbLogPerror("shmat");
			clean_up_exit(1);
		}
		raw_fb_shm = 1;
		rfbLog("rawfb: shm: %d W: %d H: %d B: %d addr: %p\n",
		    shmid, w, h, b, raw_fb_addr);
		last_mode = RAWFB_SHM;
#else
		rfbLogEnable(1);
		rfbLog("x11vnc was compiled without shm support.\n");
		rfbLogPerror("shmat");
		clean_up_exit(1);
#endif
	} else if (strstr(str, "map:") == str || strstr(str, "mmap:") == str
	    || strstr(str, "file:") == str) {
		/* map:/path/... or file:/path  */
		int fd, do_mmap = 1, size;
		struct stat sbuf;

		if (*str == 'f') {
			do_mmap = 0;
		}
		q = strchr(str, ':');
		q++;

		macosx_console = 0;
		if (strstr(q, "macosx:") == q) {
			/* mmap:macosx:/dev/null@... */
			q += strlen("macosx:");			
			do_macosx = 1;
			do_mmap = 0;
			macosx_console = 1;
		}

		last_file = strdup(q);

		fd = raw_fb_fd;
		if (fd < 0 && rawfb_dev_video) {
			fd = open(q, O_RDWR);
		}
		if (fd < 0) {
			fd = open(q, O_RDONLY);
		}
		if (fd < 0) {
			rfbLogEnable(1);
			rfbLog("failed to open file: %s, %s\n", q, str);
			rfbLogPerror("open");
			linux_dev_fb_msg(q);
			clean_up_exit(1);
		}
		raw_fb_fd = fd;

		if (raw_fb_native_bpp < 8) {
			size = w*h*raw_fb_native_bpp/8 + raw_fb_offset;
		} else if (xform24to32) {
			size = w*h*24/8 + raw_fb_offset;
		} else {
			size = w*h*b/8 + raw_fb_offset;
		}
		if (fstat(fd, &sbuf) == 0) {
			if (S_ISREG(sbuf.st_mode)) {
				if (0) size = sbuf.st_size;
			} else {
				rfbLog("raw fb is non-regular file: %s\n", q);
			}
		}

		if (do_macosx) {
			raw_fb_addr = macosx_get_fb_addr();
			raw_fb_mmap = size;
			rfbLog("rawfb: macosx fb: %s\n", q);
			rfbLog("   w: %d h: %d b: %d addr: %p sz: %d\n", w, h,
			    b, raw_fb_addr, size);
			last_mode = 0;
		} else if (do_reflect) {
			raw_fb_mmap = size;
			rfbLog("rawfb: vnc fb: %s\n", q);
			rfbLog("   w: %d h: %d b: %d addr: %p sz: %d\n", w, h,
			    b, raw_fb_addr, size);
			last_mode = 0;

		} else if (do_mmap) {
#if LIBVNCSERVER_HAVE_MMAP
			raw_fb_addr = mmap(0, size, PROT_READ, MAP_SHARED,
			    fd, 0);

			if (raw_fb_addr == MAP_FAILED || raw_fb_addr == NULL) {
				rfbLogEnable(1);
				rfbLog("failed to mmap file: %s, %s\n", q, str);
				rfbLog("   raw_fb_addr: %p\n", raw_fb_addr);
				rfbLogPerror("mmap");

				raw_fb_addr = NULL;
				rfbLog("mmap(2) failed, trying slower lseek(2)\n");
				raw_fb_seek = size;
				last_mode = RAWFB_FILE;

			} else {
				raw_fb_mmap = size;

				rfbLog("rawfb: mmap file: %s\n", q);
				rfbLog("   w: %d h: %d b: %d addr: %p sz: %d\n", w, h,
				    b, raw_fb_addr, size);
				last_mode = RAWFB_MMAP;
			}
#else
			rfbLog("mmap(2) not supported on system, using"
			    " slower lseek(2)\n");
			raw_fb_seek = size;
			last_mode = RAWFB_FILE;
#endif
		} else {
			raw_fb_seek = size;
			last_mode = RAWFB_FILE;

			rfbLog("rawfb: seek file: %s\n", q);
			rfbLog("   W: %d H: %d B: %d sz: %d\n", w, h, b, size);
		}
	} else {
		rfbLogEnable(1);
		rfbLog("invalid rawfb str: %s\n", str);
		clean_up_exit(1);
	}

	if (unlink_me) {
		unlink(unlink_me);
	}

	if (! raw_fb_image) {
		raw_fb_image = &ximage_struct;
	}

	initialize_clipshift();

	if (raw_fb_bytes_per_line == 0) {
		raw_fb_bytes_per_line = dpy_x*b/8;

		/*
		 * Put cases here were we can determine that
		 * raw_bytes_per_line != dpy_x*b/8
		 */
#ifdef MACOSX
		if (do_macosx) {
			raw_fb_bytes_per_line = macosxCG_CGDisplayBytesPerRow();
		}
#endif
	}

	raw_fb_image->bytes_per_line = dpy_x * b/8;
	raw_fb = (char *) malloc(dpy_y * dpy_x * b/8);
	raw_fb_image->data = raw_fb;
	raw_fb_image->format = ZPixmap;
	raw_fb_image->width  = dpy_x;
	raw_fb_image->height = dpy_y;
	raw_fb_image->bits_per_pixel = b;
	raw_fb_image->bitmap_unit = -1;


	if (use_snapfb && (raw_fb_seek || raw_fb_mmap)) {
		int b_use = b;
		if (snap_fb) {
			free(snap_fb);
		}
		if (b_use == 32 && xform24to32) {
			/*
			 * The actual framebuffer (e.g. mapped addr) and
			 * snap fb must be the same bpp.  E.g. both 24bpp.
			 * Reading FROM snap to utility image will be
			 * transformed 24->32 in copy_raw_fb_24_to_32.
			 *
			 * addr -> snap -> (scanline, fullscreen, ...)
			 */
			b_use = 24;
			raw_fb_bytes_per_line = dpy_x * b_use/8;
		}
		snap_fb = (char *) malloc(dpy_y * dpy_x * b_use/8);
		snap = &ximage_struct_snap;
		snap->data = snap_fb;
		snap->format = ZPixmap;
		snap->width  = dpy_x;
		snap->height = dpy_y;
		snap->bits_per_pixel = b_use;
		snap->bytes_per_line = dpy_x * b_use/8;
		snap->bitmap_unit = -1;
	}


	raw_fb_image->red_mask = rm;
	raw_fb_image->green_mask = gm;
	raw_fb_image->blue_mask = bm;

	raw_fb_image->depth = 0;
	m = 1;
	for (i=0; i<32; i++)  {
		if (rm & m) {
			raw_fb_image->depth++;
		}
		if (gm & m) {
			raw_fb_image->depth++;
		}
		if (bm & m) {
			raw_fb_image->depth++;
		}
		m = m << 1;
	}
	if (raw_fb_native_bpp < 8) {
		raw_fb_image->depth = raw_fb_expand_bytes * 8;
	}
	if (! raw_fb_image->depth) { 
		raw_fb_image->depth = (b == 32) ? 24 : b;
	}

	depth = raw_fb_image->depth;

	if (raw_fb_image->depth == 15) {
		/* unresolved bug with RGB555... */
		depth++;
	}

	if (clipshift || raw_fb_native_bpp < 8) {
		memset(raw_fb, 0xff, dpy_y * raw_fb_image->bytes_per_line);
	} else if (raw_fb_addr && ! xform24to32) {
		memcpy(raw_fb, raw_fb_addr + raw_fb_offset, dpy_y * raw_fb_image->bytes_per_line);
	} else {
		memset(raw_fb, 0xff, dpy_y * raw_fb_image->bytes_per_line);
	}

	if (verbose) {
		rfbLog("\n");
		rfbLog("rawfb:  raw_fb  %p\n", raw_fb);
		rfbLog("        format  %d\n", raw_fb_image->format);
		rfbLog("        width   %d\n", raw_fb_image->width);
		rfbLog("        height  %d\n", raw_fb_image->height);
		rfbLog("        bpp     %d\n", raw_fb_image->bits_per_pixel);
		rfbLog("        depth   %d\n", raw_fb_image->depth);
		rfbLog("        bpl     %d\n", raw_fb_image->bytes_per_line);
		if (use_snapfb && snap_fb) {
			rfbLog("        snap_fb %p\n", snap_fb);
		}
	}

	free(str);

	return raw_fb_image;
}

static void initialize_clipshift(void) {
	clipshift = 0;
	cdpy_x = cdpy_y = coff_x = coff_y = 0;
	if (clip_str) {
		int w, h, x, y, bad = 0;
		if (parse_geom(clip_str, &w, &h, &x, &y, wdpy_x, wdpy_y)) {
			if (x < 0) {
				x = 0;
			}
			if (y < 0) {
				y = 0;
			}
			if (x + w > wdpy_x) {
				w = wdpy_x - x;
			}
			if (y + h > wdpy_y) {
				h = wdpy_y - y;
			}
			if (w <= 0 || h <= 0) {
				bad = 1;
			}
		} else {
			bad = 1;
		}
		if (bad) {
			rfbLog("skipping invalid -clip WxH+X+Y: %s\n",
			    clip_str); 
		} else {
			/* OK, change geom behind everyone's back... */
			cdpy_x = w;
			cdpy_y = h;
			coff_x = x;
			coff_y = y;

			clipshift = 1;

			dpy_x = cdpy_x;
			dpy_y = cdpy_y;
		}
	}
}

static int wait_until_mapped(Window win) {
#if NO_X11
	if (!win) {}
	return 0;
#else
	int ms = 50, waittime = 30;
	time_t start = time(NULL);
	XWindowAttributes attr;

	while (1) {
		if (! valid_window(win, NULL, 0)) {
			if (time(NULL) > start + waittime) {
				break;
			}
			usleep(ms * 1000);
			continue;
		}
		if (dpy && ! XGetWindowAttributes(dpy, win, &attr)) {
			return 0;
		}
		if (attr.map_state == IsViewable) {
			return 1;
		}
		usleep(ms * 1000);
	}
	return 0;
#endif	/* NO_X11 */
}

/*
 * initialize a fb for the X display
 */
XImage *initialize_xdisplay_fb(void) {
#if NO_X11
	if (raw_fb_str) {
		return initialize_raw_fb(0);
	}
	return NULL;
#else
	XImage *fb;
	char *vis_str = visual_str;
	int try = 0, subwin_tries = 3;
	XErrorHandler old_handler = NULL;
	int subwin_bs;

	if (raw_fb_str) {
		return initialize_raw_fb(0);
	}

	X_LOCK;
	if (subwin) {
		if (subwin_wait_mapped) {
			wait_until_mapped(subwin);
		}
		if (!valid_window((Window) subwin, NULL, 0)) {
			rfbLogEnable(1);
			rfbLog("invalid sub-window: 0x%lx\n", subwin);
			X_UNLOCK;
			clean_up_exit(1);
		}
	}
	
	if (overlay) {
		/* 
		 * ideally we'd like to not have to cook up the
		 * visual variables but rather let it all come out
		 * of XReadScreen(), however there is no way to get
		 * a default visual out of it, so we pretend -visual
		 * TrueColor:NN was supplied with NN usually 24.
		 */
		char str[32];
		Window twin = subwin ? subwin : rootwin;
		XImage *xi;

		xi = xreadscreen(dpy, twin, 0, 0, 8, 8, False);
		sprintf(str, "TrueColor:%d", xi->depth);
		if (xi->depth != 24 && ! quiet) {
			rfbLog("warning: overlay image has depth %d "
			    "instead of 24.\n", xi->depth);
		}
		XDestroyImage(xi);
		if (visual_str != NULL && ! quiet) {
			rfbLog("warning: replacing '-visual %s' by '%s' "
			    "for use with -overlay\n", visual_str, str);
		}
		vis_str = strdup(str);
	}

	if (xform24to32) {
		if (DefaultDepth(dpy, scr) == 24) {
			vis_str = strdup("TrueColor:32");
			rfbLog("initialize_xdisplay_fb: vis_str set to: %s\n",
			    vis_str);
			visual_id = (VisualID) 0;
			visual_depth = 0;
			set_visual_str_to_something = 1;
		}
	} else if (DefaultDepth(dpy, scr) < 8) {
		/* check very low bpp case, e.g. mono or vga16 */
		Screen *s = DefaultScreenOfDisplay(dpy);
		XImage *xi = XGetImage_wr(dpy, DefaultRootWindow(dpy), 0, 0, 2, 2, AllPlanes,
		    ZPixmap);
		if (xi && xi->bits_per_pixel < 8) {
			int lowbpp = xi->bits_per_pixel; 
			if (!vis_str) {
				char tmp[32];
				sprintf(tmp, "0x%x:8", (int) s->root_visual->visualid);
				vis_str = strdup(tmp);
				rfbLog("initialize_xdisplay_fb: low bpp[%d], vis_str "
				    "set to: %s\n", lowbpp, vis_str);
			}
			if (using_shm) {
				using_shm = 0;
				rfbLog("initialize_xdisplay_fb: low bpp[%d], "
				    "disabling shm\n", lowbpp);
			}
			visual_id = (VisualID) 0;
			visual_depth = 0;
			set_visual_str_to_something = 1;
		}
		if (xi) {
			XDestroyImage(xi);
		}
	}

	if (vis_str != NULL) {
		set_visual(vis_str);
		if (vis_str != visual_str) {
			free(vis_str);
		}
	}
if (0) fprintf(stderr, "vis_str %s\n", vis_str ? vis_str : "notset");

	/* set up parameters for subwin or non-subwin cases: */

	if (! subwin) {
		/* full screen */
		window = rootwin;
		dpy_x = wdpy_x = DisplayWidth(dpy, scr);
		dpy_y = wdpy_y = DisplayHeight(dpy, scr);
		off_x = 0;
		off_y = 0;
		/* this may be overridden via visual_id below */
		default_visual = DefaultVisual(dpy, scr);
	} else {
		/* single window */
		XWindowAttributes attr;

		window = (Window) subwin;
		if (! XGetWindowAttributes(dpy, window, &attr)) {
			rfbLogEnable(1);
			rfbLog("invalid window: 0x%lx\n", window);
			X_UNLOCK;
			clean_up_exit(1);
		}
		dpy_x = wdpy_x = attr.width;
		dpy_y = wdpy_y = attr.height;

		subwin_bs = attr.backing_store;

		/* this may be overridden via visual_id below */
		default_visual = attr.visual;

		X_UNLOCK;
		set_offset();
		X_LOCK;
	}

	initialize_clipshift();

	/* initialize depth to reasonable value, visual_id may override */
	depth = DefaultDepth(dpy, scr);

if (0) fprintf(stderr, "DefaultDepth: %d  visial_id: %d\n", depth, (int) visual_id);

	if (visual_id) {
		int n;
		XVisualInfo vinfo_tmpl, *vinfo;

		/*
		 * we are in here from -visual or -overlay options
		 * visual_id and visual_depth were set in set_visual().
		 */

		vinfo_tmpl.visualid = visual_id; 
		vinfo = XGetVisualInfo(dpy, VisualIDMask, &vinfo_tmpl, &n);
		if (vinfo == NULL || n == 0) {
			rfbLogEnable(1);
			rfbLog("could not match visual_id: 0x%x\n",
			    (int) visual_id);
			X_UNLOCK;
			clean_up_exit(1);
		}
		default_visual = vinfo->visual;
		depth = vinfo->depth;
		if (visual_depth) {
			/* force it from -visual MooColor:NN */
			depth = visual_depth;
		}
		if (! quiet) {
			fprintf(stderr, " initialize_xdisplay_fb()\n");
			fprintf(stderr, " Visual*:    %p\n",
			    (void *) vinfo->visual);
			fprintf(stderr, " visualid:   0x%x\n",
			    (int) vinfo->visualid);
			fprintf(stderr, " screen:     %d\n", vinfo->screen);
			fprintf(stderr, " depth:      %d\n", vinfo->depth);
			fprintf(stderr, " class:      %d\n", vinfo->class);
			fprintf(stderr, " red_mask:   0x%08lx  %s\n",
			    vinfo->red_mask, bitprint(vinfo->red_mask, 32));
			fprintf(stderr, " green_mask: 0x%08lx  %s\n",
			    vinfo->green_mask, bitprint(vinfo->green_mask, 32));
			fprintf(stderr, " blue_mask:  0x%08lx  %s\n",
			    vinfo->blue_mask, bitprint(vinfo->blue_mask, 32));
			fprintf(stderr, " cmap_size:  %d\n",
			    vinfo->colormap_size);
			fprintf(stderr, " bits b/rgb: %d\n",
			    vinfo->bits_per_rgb);
			fprintf(stderr, "\n");
		}
		XFree_wr(vinfo);
	}

	if (! quiet) {
		rfbLog("Default visual ID: 0x%x\n",
		    (int) XVisualIDFromVisual(default_visual));
	}

	again:
	if (subwin) {
		int shift = 0;
		int subwin_x, subwin_y;
		int disp_x = DisplayWidth(dpy, scr);
		int disp_y = DisplayHeight(dpy, scr);
		Window twin;
		/* subwins can be a dicey if they are changing size... */
		trapped_xerror = 0;
		old_handler = XSetErrorHandler(trap_xerror);
		XTranslateCoordinates(dpy, window, rootwin, 0, 0, &subwin_x,
		    &subwin_y, &twin);

		if (subwin_x + wdpy_x > disp_x) {
			shift = 1;
			subwin_x = disp_x - wdpy_x - 3;
		}
		if (subwin_y + wdpy_y > disp_y) {
			shift = 1;
			subwin_y = disp_y - wdpy_y - 3;
		}
		if (subwin_x < 0) {
			shift = 1;
			subwin_x = 1;
		}
		if (subwin_y < 0) {
			shift = 1;
			subwin_y = 1;
		}

		if (shift) {
			XMoveWindow(dpy, window, subwin_x, subwin_y);
		}
		XMapRaised(dpy, window);
		XRaiseWindow(dpy, window);
		XFlush_wr(dpy);
	}
	try++;

	if (nofb) {
		/* 
		 * For -nofb we do not allocate the framebuffer, so we
		 * can save a few MB of memory. 
		 */
		fb = XCreateImage_wr(dpy, default_visual, depth, ZPixmap,
		    0, NULL, dpy_x, dpy_y, BitmapPad(dpy), 0);

	} else if (visual_id) {
		/*
		 * we need to call XCreateImage to supply the visual
		 */
		fb = XCreateImage_wr(dpy, default_visual, depth, ZPixmap,
		    0, NULL, dpy_x, dpy_y, BitmapPad(dpy), 0);
		fb->data = (char *) malloc(fb->bytes_per_line * fb->height);

	} else {
		fb = XGetImage_wr(dpy, window, 0, 0, dpy_x, dpy_y, AllPlanes,
		    ZPixmap);
		if (! quiet) {
			rfbLog("Read initial data from X display into"
			    " framebuffer.\n");
		}
	}

	if (subwin) {
		XSetErrorHandler(old_handler);
		if (trapped_xerror) {
		    rfbLog("trapped GetImage at SUBWIN creation.\n");
		    if (try < subwin_tries) {
			usleep(250 * 1000);
			if (!get_window_size(window, &wdpy_x, &wdpy_y)) {
				rfbLogEnable(1);
				rfbLog("could not get size of subwin "
				    "0x%lx\n", subwin);
				X_UNLOCK;
				clean_up_exit(1);
			}
			goto again;
		    }
		}
		trapped_xerror = 0;

	} else if (! fb && try == 1) {
		/* try once more */
		usleep(250 * 1000);
		goto again;
	}
	if (use_snapfb) {
		initialize_snap_fb();
	}
	X_UNLOCK;

	if (fb->bits_per_pixel == 24 && ! quiet) {
		rfbLog("warning: 24 bpp may have poor performance.\n");
	}
	return fb;
#endif	/* NO_X11 */
}

void parse_scale_string(char *str, double *factor_x, double *factor_y, int *scaling, int *blend,
    int *nomult4, int *pad, int *interpolate, int *numer, int *denom, int w_in, int h_in) {

	int m, n;
	char *p, *tstr;
	double f, f2;

	*factor_x = 1.0;
	*factor_y = 1.0;
	*scaling = 0;
	*blend = 1;
	*nomult4 = 0;
	*pad = 0;
	*interpolate = 0;
	*numer = 0, *denom = 0;

	if (str == NULL || str[0] == '\0') {
		return;
	}
	tstr = strdup(str);
	
	if ( (p = strchr(tstr, ':')) != NULL) {
		/* options */
		if (strstr(p+1, "nb") != NULL) {
			*blend = 0;
		}
		if (strstr(p+1, "fb") != NULL) {
			*blend = 2;
		}
		if (strstr(p+1, "n4") != NULL) {
			*nomult4 = 1;
		}
		if (strstr(p+1, "in") != NULL) {
			*interpolate = 1;
		}
		if (strstr(p+1, "pad") != NULL) {
			*pad = 1;
		}
		if (strstr(p+1, "nocr") != NULL) {
			/* global */
			scaling_copyrect = 0;
		} else if (strstr(p+1, "cr") != NULL) {
			/* global */
			scaling_copyrect = 1;
		}
		*p = '\0';
	}

	if (strchr(tstr, '.') != NULL) {
		double test, diff, eps = 1.0e-7;
		if (sscanf(tstr, "%lfx%lf", &f, &f2) == 2) {
			*factor_x = (double) f;
			*factor_y = (double) f2;
		} else if (sscanf(tstr, "%lf", &f) != 1) {
			rfbLogEnable(1);
			rfbLog("invalid -scale arg: %s\n", tstr);
			clean_up_exit(1);
		} else {
			*factor_x = (double) f;
			*factor_y = (double) f;
		}
		/* look for common fractions from small ints: */
		if (*factor_x == *factor_y) {
			for (n=2; n<=10; n++) {
				for (m=1; m<n; m++) {
					test = ((double) m)/ n;
					diff = *factor_x - test;
					if (-eps < diff && diff < eps) {
						*numer = m;
						*denom = n;
						break;
					
					}
				}
				if (*denom) {
					break;
				}
			}
			if (*factor_x < 0.01) {
				rfbLogEnable(1);
				rfbLog("-scale factor too small: %f\n", *factor_x);
				clean_up_exit(1);
			}
		}
	} else if (sscanf(tstr, "%dx%d", &m, &n) == 2 && w_in > 0 && h_in > 0) {
		*factor_x = ((double) m) / ((double) w_in);
		*factor_y = ((double) n) / ((double) h_in);
	} else {
		if (sscanf(tstr, "%d/%d", &m, &n) != 2) {
			if (sscanf(tstr, "%d", &m) != 1) {
				rfbLogEnable(1);
				rfbLog("invalid -scale arg: %s\n", tstr);
				clean_up_exit(1);
			} else {
				/* e.g. -scale 1 or -scale 2 */
				n = 1;
			}
		}
		if (n <= 0 || m <=0) {
			rfbLogEnable(1);
			rfbLog("invalid -scale arg: %s\n", tstr);
			clean_up_exit(1);
		}
		*factor_x = ((double) m)/ n;
		*factor_y = ((double) m)/ n;
		if (*factor_x < 0.01) {
			rfbLogEnable(1);
			rfbLog("-scale factor too small: %f\n", *factor_x);
			clean_up_exit(1);
		}
		*numer = m;
		*denom = n;
	}
	if (*factor_x == 1.0 && *factor_y == 1.0) {
		if (! quiet) {
			rfbLog("scaling disabled for factor %f %f\n", *factor_x, *factor_y);
		}
	} else {
		*scaling = 1;
	}
	free(tstr);
}

int parse_rotate_string(char *str, int *mode) {
	int m = ROTATE_NONE;
	if (str == NULL || !strcmp(str, "") || !strcmp(str, "0")) {
		m = ROTATE_NONE;
	} else if (!strcmp(str, "x")) {
		m = ROTATE_X;
	} else if (!strcmp(str, "y")) {
		m = ROTATE_Y;
	} else if (!strcmp(str, "xy") || !strcmp(str, "yx") ||
	    !strcmp(str,"+180") || !strcmp(str,"-180") || !strcmp(str,"180")) {
		m = ROTATE_XY;
	} else if (!strcmp(str, "+90") || !strcmp(str, "90")) {
		m = ROTATE_90;
	} else if (!strcmp(str, "+90x") || !strcmp(str, "90x")) {
		m = ROTATE_90X;
	} else if (!strcmp(str, "+90y") || !strcmp(str, "90y")) {
		m = ROTATE_90Y;
	} else if (!strcmp(str, "-90") || !strcmp(str, "270") ||
	    !strcmp(str, "+270")) {
		m = ROTATE_270;
	} else {
		rfbLog("invalid -rotate mode: %s\n", str);
	}
	if (mode) {
		*mode = m;
	}
	return m;
}

int scale_round(int len, double fac) {
	double eps = 0.000001;
	
	len = (int) (len * fac + eps);
	if (len < 1) {
		len = 1;
	}
	return len;
}

static void setup_scaling(int *width_in, int *height_in) {
	int width  = *width_in;
	int height = *height_in;

	parse_scale_string(scale_str, &scale_fac_x, &scale_fac_y, &scaling, &scaling_blend,
	    &scaling_nomult4, &scaling_pad, &scaling_interpolate,
	    &scale_numer, &scale_denom, *width_in, *height_in);

	if (scaling) {
		width  = scale_round(width,  scale_fac_x);
		height = scale_round(height, scale_fac_y);
		if (scale_denom && scaling_pad) {
			/* it is not clear this padding is useful anymore */
			rfbLog("width  %% denom: %d %% %d = %d\n", width,
			    scale_denom, width  % scale_denom);
			rfbLog("height %% denom: %d %% %d = %d\n", height,
			    scale_denom, height % scale_denom);
			if (width % scale_denom != 0) {
				int w = width;
				w += scale_denom - (w % scale_denom);
				if (!scaling_nomult4 && w % 4 != 0) {
					/* need to make mult of 4 as well */
					int c = 0;	
					while (w % 4 != 0 && c++ <= 5) {
						w += scale_denom;
					}
				}
				width = w;
				rfbLog("padded width  to: %d (mult of %d%s\n",
				    width, scale_denom, !scaling_nomult4 ?
				    " and 4)" : ")");
			}
			if (height % scale_denom != 0) {
				height += scale_denom - (height % scale_denom);
				rfbLog("padded height to: %d (mult of %d)\n",
				    height, scale_denom);
			}
		}
		if (!scaling_nomult4 && width % 4 != 0 && width > 2) {
			/* reset width to be multiple of 4 */
			int width0 = width;
			if ((width+1) % 4 == 0) {
				width = width+1;
			} else if ((width-1) % 4 == 0) {
				width = width-1;
			} else if ((width+2) % 4 == 0) {
				width = width+2;
			}
			rfbLog("reset scaled width %d -> %d to be a multiple of"
			    " 4 (to\n", width0, width);
			rfbLog("make vncviewers happy). use -scale m/n:n4 to "
			    "disable.\n");
		}
		scaled_x = width;
		scaled_y = height;

		*width_in  = width;
		*height_in = height;
	}
}

static void setup_rotating(void) {
	char *rs = rotating_str;

	rotating_cursors = 1;
	if (rs && strstr(rs, "nc:") == rs) {
		rs += strlen("nc:");
		rotating_cursors = 0;
	}

	rotating = parse_rotate_string(rs, NULL);
	if (! rotating) {
		rotating_cursors = 0;
	}

	if (rotating == ROTATE_90  || rotating == ROTATE_90X ||
	    rotating == ROTATE_90Y || rotating == ROTATE_270) {
		rotating_same = 0;
	} else {
		rotating_same = 1;
	}
}

static rfbBool set_xlate_wrapper(rfbClientPtr cl) {
	static int first = 1;
	if (first) {
		first = 0;
	} else if (ncache) {
		int save = ncache_xrootpmap;
		rfbLog("set_xlate_wrapper: clearing -ncache for new pixel format.\n");
		ncache_xrootpmap = 0;
		check_ncache(1, 0);
		ncache_xrootpmap = save;
	}
	return rfbSetTranslateFunction(cl);	
}

/*
 * initialize the rfb framebuffer/screen
 */
void initialize_screen(int *argc, char **argv, XImage *fb) {
	int have_masks = 0;
	int width  = fb->width;
	int height = fb->height;
	int create_screen = screen ? 0 : 1;
	int bits_per_color;
	int fb_bpp, fb_Bpl, fb_depth;
	
	bpp = fb->bits_per_pixel;

	fb_bpp   = (int) fb->bits_per_pixel;
	fb_Bpl   = (int) fb->bytes_per_line;
	fb_depth = (int) fb->depth;

	rfbLog("initialize_screen: fb_depth/fb_bpp/fb_Bpl %d/%d/%d\n", fb_depth,
	    fb_bpp, fb_Bpl);

	main_bytes_per_line = fb->bytes_per_line;

	if (cmap8to24) {
		if (raw_fb) {
			if (!quiet) rfbLog("disabling -8to24 mode"
			    " in raw_fb mode.\n");
			cmap8to24 = 0;
		} else if (depth == 24) {
			if (fb_bpp != 32)  {
				if (!quiet) rfbLog("disabling -8to24 mode:"
				    " bpp != 32 with depth == 24\n");
				cmap8to24 = 0;
			}
		} else if (depth <= 16) {
			/* need to cook up the screen fb to be depth 24 */
			fb_bpp = 32;
			fb_depth = 24;
		} else {
			if (!quiet) rfbLog("disabling -8to24 mode:"
			    " default depth not 16 or less\n");
			cmap8to24 = 0;
		}
	}

	setup_scaling(&width, &height);

	if (scaling) {
		rfbLog("scaling screen: %dx%d -> %dx%d\n", fb->width, fb->height, scaled_x, scaled_y);
		rfbLog("scaling screen: scale_fac_x=%.5f scale_fac_y=%.5f\n", scale_fac_x, scale_fac_y);

		rfb_bytes_per_line = (main_bytes_per_line / fb->width) * width;
	} else {
		rfb_bytes_per_line = main_bytes_per_line;
	}

	setup_rotating();

	if (rotating) {
		if (! rotating_same) {
			int t, b = main_bytes_per_line / fb->width;
			if (scaling) {
				rot_bytes_per_line = b * height;
			} else {
				rot_bytes_per_line = b * fb->height;
			}
			t = width;
			width = height;		/* The big swap... */
			height = t;
		} else {
			rot_bytes_per_line = rfb_bytes_per_line;
		}
	}

#ifndef NO_NCACHE
	if (ncache > 0 && !nofb) {
# ifdef MACOSX
		if (! raw_fb_str || macosx_console) {
# else
		if (! raw_fb_str) {
# endif
			
			char *new_fb;
			int sz = fb->height * fb->bytes_per_line;
			int ns = 1+ncache;

			if (ncache_xrootpmap) {
				ns++;
			}

			new_fb = (char *) calloc((size_t) (sz * ns), 1);
			if (fb->data) {
				memcpy(new_fb, fb->data, sz);
				free(fb->data);
			}
			fb->data = new_fb;
			fb->height *= (ns);
			height *= (ns);
			ncache0 = ncache;
		}
	}
#endif

	if (cmap8to24) {
		if (depth <= 8) {
			rfb_bytes_per_line *= 4;
			rot_bytes_per_line *= 4;
		} else if (depth <= 16) {
			rfb_bytes_per_line *= 2;
			rot_bytes_per_line *= 2;
		}
	}

	/*
	 * These are just hints wrt pixel format just to let
	 * rfbGetScreen/rfbNewFramebuffer proceed with reasonable
	 * defaults.  We manually set them in painful detail below.
	 */
	bits_per_color = guess_bits_per_color(fb_bpp);

	/* n.b. samplesPerPixel (set = 1 here) seems to be unused. */
	if (create_screen) {
		if (use_openssl) {
			openssl_init(0);
		} else if (use_stunnel) {
			setup_stunnel(0, argc, argv);
		}
		screen = rfbGetScreen(argc, argv, width, height,
		    bits_per_color, 1, fb_bpp/8);
		if (screen && http_dir) {
			http_connections(1);
		}
	} else {
		/* set set frameBuffer member below. */
		rfbLog("rfbNewFramebuffer(0x%x, 0x%x, %d, %d, %d, %d, %d)\n",
		    screen, NULL, width, height, bits_per_color, 1, fb_bpp/8);

		/* these are probably overwritten, but just to be safe: */
		screen->bitsPerPixel = fb_bpp;
		screen->depth = fb_depth;

		rfbNewFramebuffer(screen, NULL, width, height,
		    bits_per_color, 1, (int) fb_bpp/8);
	}
	if (! screen) {
		int i;
		rfbLogEnable(1);
		rfbLog("\n");
		rfbLog("failed to create rfb screen.\n");
		for (i=0; i< *argc; i++)  {
			rfbLog("\t[%d]  %s\n", i, argv[i]);
		}
		clean_up_exit(1);
	}

	if (create_screen && *argc != 1) {
		int i;
		rfbLogEnable(1);
		rfbLog("*** unrecognized option(s) ***\n");
		for (i=1; i< *argc; i++)  {
			rfbLog("\t[%d]  %s\n", i, argv[i]);
		}
		rfbLog("For a list of options run: x11vnc -opts\n");
		rfbLog("or for the full help: x11vnc -help\n");
		rfbLog("\n");
		rfbLog("Here is a list of removed or obsolete"
		    " options:\n");
		rfbLog("\n");
		rfbLog("removed: -hints, -nohints\n");
		rfbLog("removed: -cursorposall\n");
		rfbLog("removed: -nofilexfer, now the default.\n");
		rfbLog("\n");
		rfbLog("renamed: -old_copytile, use -onetile\n");
		rfbLog("renamed: -mouse,   use -cursor\n");
		rfbLog("renamed: -mouseX,  use -cursor X\n");
		rfbLog("renamed: -X,       use -cursor X\n");
		rfbLog("renamed: -nomouse, use -nocursor\n");
		rfbLog("renamed: -old_pointer, use -pointer_mode 1\n");
	
		clean_up_exit(1);
	}

	/* set up format from scratch: */
	if (rotating && ! rotating_same) {
		screen->paddedWidthInBytes = rot_bytes_per_line;
	} else {
		screen->paddedWidthInBytes = rfb_bytes_per_line;
	}
	screen->serverFormat.bitsPerPixel = fb_bpp;
	screen->serverFormat.depth = fb_depth;
	screen->serverFormat.trueColour = TRUE;

	screen->serverFormat.redShift   = 0;
	screen->serverFormat.greenShift = 0;
	screen->serverFormat.blueShift  = 0;
	screen->serverFormat.redMax     = 0;
	screen->serverFormat.greenMax   = 0;
	screen->serverFormat.blueMax    = 0;

	/* these main_* formats are used generally. */
	main_red_shift   = 0;
	main_green_shift = 0;
	main_blue_shift  = 0;
	main_red_max     = 0;
	main_green_max   = 0;
	main_blue_max    = 0;
	main_red_mask    = fb->red_mask;
	main_green_mask  = fb->green_mask;
	main_blue_mask   = fb->blue_mask;

	have_masks = ((fb->red_mask|fb->green_mask|fb->blue_mask) != 0);
	if (force_indexed_color) {
		have_masks = 0;
	}

	if (cmap8to24 && depth <= 16 && dpy) {
		XVisualInfo vinfo;
		vinfo.red_mask = 0;
		vinfo.green_mask = 0;
		vinfo.blue_mask = 0;
		/* more cooking up... */
		have_masks = 2;
		/* need to fetch TrueColor visual */
		X_LOCK;
		if (dpy
#if !NO_X11
		    && XMatchVisualInfo(dpy, scr, 24, TrueColor, &vinfo)
#endif
		    ) {
			main_red_mask   = vinfo.red_mask;
			main_green_mask = vinfo.green_mask;
			main_blue_mask  = vinfo.blue_mask;
		} else if (fb->byte_order == LSBFirst) {
			main_red_mask   = 0x00ff0000;
			main_green_mask = 0x0000ff00;
			main_blue_mask  = 0x000000ff;
		} else {
			main_red_mask   = 0x000000ff;
			main_green_mask = 0x0000ff00;
			main_blue_mask  = 0x00ff0000;
		}
		X_UNLOCK;
	}

	if (raw_fb_str && raw_fb_pixfmt) {
		char *fmt = strdup(raw_fb_pixfmt);
		uppercase(fmt);
		if (strstr(fmt, "GREY")) {
			set_greyscale_colormap();
		} else if (strstr(fmt, "HI240")) {
			set_hi240_colormap();
		} else {
			unset_colormap();
		}
		free(fmt);
	}

	if (! have_masks && screen->serverFormat.bitsPerPixel <= 16
	    && dpy && CellsOfScreen(ScreenOfDisplay(dpy, scr))) {
		/* indexed color. we let 1 <= bpp <= 16, but it is normally 8 */
		if (!quiet) {
			rfbLog("\n");
			rfbLog("X display %s is %dbpp indexed color, depth=%d\n",
			    DisplayString(dpy), screen->serverFormat.bitsPerPixel,
			    screen->serverFormat.depth);
			if (! flash_cmap && ! overlay) {
				rfbLog("\n");
				rfbLog("In 8bpp PseudoColor mode if you "
				    "experience color\n");
				rfbLog("problems you may want to enable "
				    "following the\n");
				rfbLog("changing colormap by using the "
				    "-flashcmap option.\n");
				rfbLog("\n");
			}
		}
		if (screen->serverFormat.depth < 8) {
			rfbLog("resetting serverFormat.depth %d -> 8.\n",
			    screen->serverFormat.depth);
			rfbLog("resetting serverFormat.bpp   %d -> 8.\n",
			    screen->serverFormat.bitsPerPixel);
			screen->serverFormat.depth = 8;
			screen->serverFormat.bitsPerPixel = 8;
		}
		if (screen->serverFormat.depth > 8) {
			rfbLog("WARNING: indexed color depth > 8, Tight encoding will crash.\n");
		}

		screen->serverFormat.trueColour = FALSE;
		indexed_color = 1;
		set_colormap(1);
		debug_colormap(fb);
	} else {
		/* 
		 * general case, we call it truecolor, but could be direct
		 * color, static color, etc....
		 */
		if (! quiet) {
			if (raw_fb) {
				rfbLog("\n");
				rfbLog("Raw fb at addr %p is %dbpp depth=%d "
				    "true color\n", raw_fb_addr,
				    fb_bpp, fb_depth);
			} else if (! dpy) {
				;
			} else if (have_masks == 2) {
				rfbLog("\n");
				rfbLog("X display %s is %dbpp depth=%d indexed "
				    "color (-8to24 mode)\n", DisplayString(dpy),
				    fb->bits_per_pixel, fb->depth);
			} else {
				rfbLog("\n");
				rfbLog("X display %s is %dbpp depth=%d true "
				    "color\n", DisplayString(dpy),
				    fb_bpp, fb_depth);
			}
		}

		indexed_color = 0;

		if (!have_masks) {
			int M, B = bits_per_color;

			if (3*B > fb_bpp) B--;
			if (B < 1) B = 1;
			M = (1 << B) - 1;

			rfbLog("WARNING: all TrueColor RGB masks are zero!\n");
			rfbLog("WARNING: cooking something up for VNC fb...  B=%d M=%d\n", B, M);
			main_red_mask   = M;
			main_green_mask = M;
			main_blue_mask  = M;
			main_red_mask   = main_red_mask   << (2*B);
			main_green_mask = main_green_mask << (1*B);
			main_blue_mask  = main_blue_mask  << (0*B);
			fprintf(stderr, " red_mask:   0x%08lx  %s\n", main_red_mask,
			    bitprint(main_red_mask, 32));
			fprintf(stderr, " green_mask: 0x%08lx  %s\n", main_green_mask,
			    bitprint(main_green_mask, 32));
			fprintf(stderr, " blue_mask:  0x%08lx  %s\n", main_blue_mask,
			    bitprint(main_blue_mask, 32));
		}

		/* convert masks to bit shifts and max # colors */
		if (main_red_mask) {
			while (! (main_red_mask
			    & (1 << screen->serverFormat.redShift))) {
				    screen->serverFormat.redShift++;
			}
		}
		if (main_green_mask) {
			while (! (main_green_mask
			    & (1 << screen->serverFormat.greenShift))) {
				    screen->serverFormat.greenShift++;
			}
		}
		if (main_blue_mask) {
			while (! (main_blue_mask
			    & (1 << screen->serverFormat.blueShift))) {
				    screen->serverFormat.blueShift++;
			}
		}
		screen->serverFormat.redMax
		    = main_red_mask   >> screen->serverFormat.redShift;
		screen->serverFormat.greenMax
		    = main_green_mask >> screen->serverFormat.greenShift;
		screen->serverFormat.blueMax
		    = main_blue_mask  >> screen->serverFormat.blueShift;

		main_red_max     = screen->serverFormat.redMax;
		main_green_max   = screen->serverFormat.greenMax;
		main_blue_max    = screen->serverFormat.blueMax;

		main_red_shift   = screen->serverFormat.redShift;
		main_green_shift = screen->serverFormat.greenShift;
		main_blue_shift  = screen->serverFormat.blueShift;
	}

#if !SMALL_FOOTPRINT
	if (verbose) {
		fprintf(stderr, "\n");
		fprintf(stderr, "FrameBuffer Info:\n");
		fprintf(stderr, " width:            %d\n", fb->width);
		fprintf(stderr, " height:           %d\n", fb->height);
		fprintf(stderr, " scaled_width:     %d\n", width);
		fprintf(stderr, " scaled_height:    %d\n", height);
		fprintf(stderr, " indexed_color:    %d\n", indexed_color);
		fprintf(stderr, " bits_per_pixel:   %d\n", fb->bits_per_pixel);
		fprintf(stderr, " depth:            %d\n", fb->depth);
		fprintf(stderr, " red_mask:   0x%08lx  %s\n", fb->red_mask,
		    bitprint(fb->red_mask, 32));
		fprintf(stderr, " green_mask: 0x%08lx  %s\n", fb->green_mask,
		    bitprint(fb->green_mask, 32));
		fprintf(stderr, " blue_mask:  0x%08lx  %s\n", fb->blue_mask,
		    bitprint(fb->blue_mask, 32));
		if (cmap8to24) {
			fprintf(stderr, " 8to24 info:\n");
			fprintf(stderr, " fb_bpp:           %d\n", fb_bpp);
			fprintf(stderr, " fb_depth:         %d\n", fb_depth);
			fprintf(stderr, " red_mask:   0x%08lx  %s\n", main_red_mask,
			    bitprint(main_red_mask, 32));
			fprintf(stderr, " green_mask: 0x%08lx  %s\n", main_green_mask,
			    bitprint(main_green_mask, 32));
			fprintf(stderr, " blue_mask:  0x%08lx  %s\n", main_blue_mask,
			    bitprint(main_blue_mask, 32));
		}
		fprintf(stderr, " red:   max: %3d  shift: %2d\n",
			main_red_max, main_red_shift);
		fprintf(stderr, " green: max: %3d  shift: %2d\n",
			main_green_max, main_green_shift);
		fprintf(stderr, " blue:  max: %3d  shift: %2d\n",
			main_blue_max, main_blue_shift);
		fprintf(stderr, " mainfb_bytes_per_line: %d\n",
			main_bytes_per_line);
		fprintf(stderr, " rfb_fb_bytes_per_line: %d\n",
			rfb_bytes_per_line);
		fprintf(stderr, " rot_fb_bytes_per_line: %d\n",
			rot_bytes_per_line);
		fprintf(stderr, " raw_fb_bytes_per_line: %d\n",
			raw_fb_bytes_per_line);
		switch(fb->format) {
		case XYBitmap:
			fprintf(stderr, " format:     XYBitmap\n"); break;
		case XYPixmap:
			fprintf(stderr, " format:     XYPixmap\n"); break;
		case ZPixmap:
			fprintf(stderr, " format:     ZPixmap\n"); break;
		default:
			fprintf(stderr, " format:     %d\n", fb->format); break;
		}
		switch(fb->byte_order) {
		case LSBFirst:
			fprintf(stderr, " byte_order: LSBFirst\n"); break;
		case MSBFirst:
			fprintf(stderr, " byte_order: MSBFirst\n"); break;
		default:
			fprintf(stderr, " byte_order: %d\n", fb->byte_order);
			break;
		}
		fprintf(stderr, " bitmap_pad:  %d\n", fb->bitmap_pad);
		fprintf(stderr, " bitmap_unit: %d\n", fb->bitmap_unit);
		switch(fb->bitmap_bit_order) {
		case LSBFirst:
			fprintf(stderr, " bitmap_bit_order: LSBFirst\n"); break;
		case MSBFirst:
			fprintf(stderr, " bitmap_bit_order: MSBFirst\n"); break;
		default:
			fprintf(stderr, " bitmap_bit_order: %d\n",
			fb->bitmap_bit_order); break;
		}
	}
	if (overlay && ! quiet) {
		rfbLog("\n");
		rfbLog("Overlay mode enabled:  If you experience color\n");
		rfbLog("problems when popup menus are on the screen, try\n");
		rfbLog("disabling SaveUnders in your X server, one way is\n");
		rfbLog("to start the X server with the '-su' option, e.g.:\n");
		rfbLog("Xsun -su ... see Xserver(1), xinit(1) for more info.\n");
		rfbLog("\n");
	}
#endif
	/* nofb is for pointer/keyboard only handling.  */
	if (nofb) {
		main_fb = NULL;
		rfb_fb = main_fb;
		cmap8to24_fb = NULL;
		rot_fb = NULL;
		screen->displayHook = nofb_hook;
	} else {
		main_fb = fb->data;
		rfb_fb = NULL;
		cmap8to24_fb = NULL;
		rot_fb = NULL;

		if (cmap8to24) {
			int n = main_bytes_per_line * fb->height;
			if (depth <= 8) {
				n *= 4;
			} else if (depth <= 16) {
				n *= 2;
			}
			cmap8to24_fb = (char *) malloc(n);
			memset(cmap8to24_fb, 0, n);
		}

		if (rotating) {
			int n = rot_bytes_per_line * height;
			rot_fb = (char *) malloc(n);
			memset(rot_fb, 0, n);
		}

		if (scaling) {
			int n = rfb_bytes_per_line * height;

			if (rotating && ! rotating_same) {
				n = rot_bytes_per_line * height;
			}

			rfb_fb = (char *) malloc(n);
			memset(rfb_fb, 0, n);

		} else if (cmap8to24) {
			rfb_fb = cmap8to24_fb;	
		} else {
			rfb_fb = main_fb;
		}
	}
	if (rot_fb) {
		screen->frameBuffer = rot_fb;
	} else {
		screen->frameBuffer = rfb_fb;
	}
	if (verbose) {
		fprintf(stderr, " rfb_fb:      %p\n", rfb_fb);
		fprintf(stderr, " main_fb:     %p\n", main_fb);
		fprintf(stderr, " 8to24_fb:    %p\n", cmap8to24_fb);
		fprintf(stderr, " rot_fb:      %p\n", rot_fb);
		fprintf(stderr, " snap_fb:     %p\n", snap_fb);
		fprintf(stderr, " raw_fb:      %p\n", raw_fb);
		fprintf(stderr, " fake_fb:     %p\n", fake_fb);
		fprintf(stderr, "\n");
	}

	/* may need, bpp, main_red_max, etc. */
	parse_wireframe();
	parse_scroll_copyrect();

	setup_cursors_and_push();

	if (scaling || rotating || cmap8to24) {
		mark_rect_as_modified(0, 0, dpy_x, dpy_y, 0);
	}

	if (! create_screen) {
		rfbClientIteratorPtr iter;
		rfbClientPtr cl;

		/* 
		 * since bits_per_color above may have been approximate,
		 * try to reset the individual translation tables...
		 * we do not seem to need this with rfbGetScreen()...
		 */
		if (!quiet) rfbLog("calling setTranslateFunction()...\n");
		iter = rfbGetClientIterator(screen);
		while ((cl = rfbClientIteratorNext(iter)) != NULL) {
			screen->setTranslateFunction(cl);
		}
		rfbReleaseClientIterator(iter);
		if (!quiet) rfbLog("  done.\n");
		do_copy_screen = 1;
		
		/* done for framebuffer change case */
		return;
	}

	/*
	 * the rest is screen server initialization, etc, only needed
	 * at screen creation time.
	 */

	/* event callbacks: */
	screen->newClientHook = new_client;
	screen->kbdAddEvent = keyboard;
	screen->ptrAddEvent = pointer;
	screen->setXCutText = xcut_receive;
	screen->setTranslateFunction = set_xlate_wrapper;

	screen->kbdReleaseAllKeys = kbd_release_all_keys; 
	screen->setSingleWindow = set_single_window; 
	screen->setServerInput = set_server_input; 
	screen->setTextChat = set_text_chat; 
	screen->getFileTransferPermission = get_file_transfer_permitted; 

	/* called from inetd, we need to treat stdio as our socket */
	if (inetd && use_openssl) {
		/* accept_openssl() called later */
		screen->port = 0;
	} else if (inetd) {
		int fd = dup(0);
		if (fd < 0) {
			rfbLogEnable(1);
			rfbErr("dup(0) = %d failed.\n", fd);
			rfbLogPerror("dup");
			clean_up_exit(1);
		}
		fclose(stdin);
		fclose(stdout);
		/* we keep stderr for logging */
		screen->inetdSock = fd;
		screen->port = 0;

	} else if (! got_rfbport && auto_port > 0) {
		int lport = find_free_port(auto_port, auto_port+200);
		screen->autoPort = FALSE;
		screen->port = lport;
	} else if (! got_rfbport) {
		screen->autoPort = TRUE;
	} else if (got_rfbport && got_rfbport_val == 0) {
		screen->autoPort = FALSE;
		screen->port = 0;
	}

	if (! got_nevershared && ! got_alwaysshared) {
		if (shared) {
			screen->alwaysShared = TRUE;
		} else {
			screen->neverShared = TRUE;
		}
		screen->dontDisconnect = TRUE;
	}
	if (! got_deferupdate) {
		screen->deferUpdateTime = defer_update;
	} else {
		defer_update = screen->deferUpdateTime;
	}

	rfbInitServer(screen);

	if (use_openssl) {
		openssl_port();
		if (https_port_num >= 0) {
			https_port();
		}
	}

	install_passwds();
}

#define DO_AVAHI \
	if (avahi) { \
		avahi_initialise(); \
		avahi_advertise(vnc_desktop_name, host, lport); \
		usleep(1000*1000); \
	}

void announce(int lport, int ssl, char *iface) {
	
	char *host = this_host();
	char *tvdt;

	if (! ssl) {
		tvdt = "The VNC desktop is:     ";
	} else {
		if (enc_str && !strcmp(enc_str, "none")) {
			tvdt = "The VNC desktop is:     ";
		} else if (enc_str) {
			tvdt = "The ENC VNC desktop is: ";
		} else {
			tvdt = "The SSL VNC desktop is: ";
		}
	}

	if (iface != NULL && *iface != '\0' && strcmp(iface, "any")) {
		host = iface;
	}
	if (host != NULL) {
		/* note that vncviewer special cases 5900-5999 */
		int sz = 256;
		if (inetd) {
			;	/* should not occur (port) */
		} else if (quiet) {
			if (lport >= 5900) {
				snprintf(vnc_desktop_name, sz, "%s:%d",
				    host, lport - 5900);
				DO_AVAHI
				fprintf(stderr, "\n%s %s\n", tvdt,
				    vnc_desktop_name);
			} else {
				snprintf(vnc_desktop_name, sz, "%s:%d",
				    host, lport);
				DO_AVAHI
				fprintf(stderr, "\n%s %s\n", tvdt,
				    vnc_desktop_name);
			}
		} else if (lport >= 5900) {
			snprintf(vnc_desktop_name, sz, "%s:%d",
			    host, lport - 5900);
			DO_AVAHI
			fprintf(stderr, "\n%s %s\n", tvdt, vnc_desktop_name);
			if (lport >= 6000) {
				rfbLog("possible aliases:  %s:%d, "
				    "%s::%d\n", host, lport,
				    host, lport);
			}
		} else {
			snprintf(vnc_desktop_name, sz, "%s:%d",
			    host, lport);
			DO_AVAHI
			fprintf(stderr, "\n%s %s\n", tvdt, vnc_desktop_name);
			rfbLog("possible alias:    %s::%d\n",
			    host, lport);
		}
	}
}

static void announce_http(int lport, int ssl, char *iface) {
	
	char *host = this_host();
	char *jvu;

	if (enc_str && !strcmp(enc_str, "none")) {
		jvu = "Java viewer URL:         http";
	} else if (ssl == 1) {
		jvu = "Java SSL viewer URL:     https";
	} else if (ssl == 2) {
		jvu = "Java SSL viewer URL:     http";
	} else {
		jvu = "Java viewer URL:         http";
	}

	if (iface != NULL && *iface != '\0' && strcmp(iface, "any")) {
		host = iface;
	}
	if (host != NULL) {
		if (! inetd) {
			fprintf(stderr, "%s://%s:%d/\n", jvu, host, lport);
			if (screen && enc_str && !strcmp(enc_str, "none")) {
				fprintf(stderr, "%s://%s:%d/\n", jvu, host, screen->port);
			}
		}
	}
}

void set_vnc_desktop_name(void) {
	sprintf(vnc_desktop_name, "unknown");
	if (inetd) {
		sprintf(vnc_desktop_name, "%s/inetd-no-further-clients",
		    this_host());
	}
	if (screen->port) {

		if (! quiet) {
			if (screen->httpListenSock > -1 && screen->httpPort) {
				rfbLog("\n");
				rfbLog("The URLs printed out below ('Java ... viewer URL') can\n");
				rfbLog("be used for Java enabled Web browser connections.\n");
				if (enc_str && !strcmp(enc_str, "none")) {
					;
				} else if (use_openssl || stunnel_port) {
					rfbLog("Here are some additional possibilities:\n");
					rfbLog("\n");
					rfbLog("https://host:port/proxy.vnc (MUST be used if Web Proxy used)\n");
					rfbLog("\n");
					rfbLog("https://host:port/ultra.vnc (Use UltraVNC Java Viewer)\n");
					rfbLog("https://host:port/ultraproxy.vnc (Web Proxy with UltraVNC)\n");
					rfbLog("https://host:port/ultrasigned.vnc (Signed UltraVNC Filexfer)\n");
					rfbLog("\n");
					rfbLog("Where you replace \"host:port\" with that printed below, or\n");
					rfbLog("whatever is needed to reach the host e.g. Internet IP number\n");
				}
			}
			rfbLog("\n");
		}

		if (use_openssl) {
			announce(screen->port, 1, listen_str);
		} else {
			announce(screen->port, 0, listen_str);
		}
		if (stunnel_port) {
			announce(stunnel_port, 1, NULL);
		}
		if (screen->httpListenSock > -1 && screen->httpPort) {
			if (use_openssl) {
				if (enc_str && !strcmp(enc_str, "none")) {
					;
				} else {
					announce_http(screen->port, 1, listen_str);
				}
				if (https_port_num >= 0) {
					announce_http(https_port_num, 1,
					    listen_str);
				}
				announce_http(screen->httpPort, 2, listen_str);
			} else if (use_stunnel) {
				announce_http(screen->httpPort, 2, listen_str);
			} else {
				announce_http(screen->httpPort, 0, listen_str);
			}
		}
		
		fflush(stderr);	
		if (inetd) {
			;	/* should not occur (port != 0) */
		} else {
			fprintf(stdout, "PORT=%d\n", screen->port);
			if (stunnel_port) {
				fprintf(stdout, "SSLPORT=%d\n", stunnel_port);
			} else if (use_openssl) {
				if (enc_str && !strcmp(enc_str, "none")) {
					;
				} else if (enc_str) {
					fprintf(stdout, "ENCPORT=%d\n", screen->port);
				} else {
					fprintf(stdout, "SSLPORT=%d\n", screen->port);
				}
			}
			fflush(stdout);	
			if (flagfile) {
				FILE *flag = fopen(flagfile, "w");
				if (flag) {
					fprintf(flag, "PORT=%d\n",screen->port);
					if (stunnel_port) {
						fprintf(flag, "SSL_PORT=%d\n",
						    stunnel_port);
					}
					fflush(flag);	
					fclose(flag);
				} else {
					rfbLog("could not open flag file: %s\n",
					    flagfile);
				}
			}
			if (rm_flagfile) {
				int create = 0;
				struct stat sb;
				if (strstr(rm_flagfile, "create:") == rm_flagfile) {
					char *s = rm_flagfile;
					create = 1;
					rm_flagfile = strdup(rm_flagfile + strlen("create:"));
					free(s);
				}
				if (strstr(rm_flagfile, "nocreate:") == rm_flagfile) {
					char *s = rm_flagfile;
					create = 0;
					rm_flagfile = strdup(rm_flagfile + strlen("nocreate:"));
					free(s);
				} else if (stat(rm_flagfile, &sb) != 0) {
					create = 1;
				}
				if (create) {
					FILE *flag = fopen(rm_flagfile, "w");
					if (flag) {
						fprintf(flag, "%d\n", getpid());
						fclose(flag);
					}
				}
			}
		}
		fflush(stdout);	
	}
}

static void check_cursor_changes(void) {
	static double last_push = 0.0;

	if (unixpw_in_progress) return;

	cursor_changes += check_x11_pointer();

	if (cursor_changes) {
		double tm, max_push = 0.125, multi_push = 0.01, wait = 0.02;
		int cursor_shape, dopush = 0, link, latency, netrate;

		if (! all_clients_initialized()) {
			/* play it safe */
			return;
		}

		if (0) cursor_shape = cursor_shape_updates_clients(screen);
	
		dtime0(&tm);
		link = link_rate(&latency, &netrate);
		if (link == LR_DIALUP) {
			max_push = 0.2;
			wait = 0.05;
		} else if (link == LR_BROADBAND) {
			max_push = 0.075;
			wait = 0.05;
		} else if (link == LR_LAN) {
			max_push = 0.01;
		} else if (latency < 5 && netrate > 200) {
			max_push = 0.01;
		}
		
		if (tm > last_push + max_push) {
			dopush = 1;
		} else if (cursor_changes > 1 && tm > last_push + multi_push) {
			dopush = 1;
		}

		if (dopush) { 
			mark_rect_as_modified(0, 0, 1, 1, 1);
			fb_push_wait(wait, FB_MOD);
			last_push = tm;
		} else {
			rfbPE(0);
		}
	}
	cursor_changes = 0;
}

/*
 * These watch_loop() releated were moved from x11vnc.c so we could try
 * to remove -O2 from its compilation.  TDB new file, e.g. watch.c.
 */

static void check_filexfer(void) {
	static time_t last_check = 0;
	rfbClientIteratorPtr iter;
	rfbClientPtr cl;
	int transferring = 0; 
	
	if (time(NULL) <= last_check) {
		return;
	}

#if 0
	if (getenv("NOFT")) {
		return;
	}
#endif

	iter = rfbGetClientIterator(screen);
	while( (cl = rfbClientIteratorNext(iter)) ) {
		if (cl->fileTransfer.receiving) {
			transferring = 1;
			break;
		}
		if (cl->fileTransfer.sending) {
			transferring = 1;
			break;
		}
	}
	rfbReleaseClientIterator(iter);

	if (transferring) {
		double start = dnow();
		while (dnow() < start + 0.5) {
			rfbCFD(5000);
			rfbCFD(1000);
			rfbCFD(0);
		}
	} else {
		last_check = time(NULL);
	}
}

static void record_last_fb_update(void) {
	static int rbs0 = -1;
	static time_t last_call = 0;
	time_t now = time(NULL);
	int rbs = -1;
	rfbClientIteratorPtr iter;
	rfbClientPtr cl;

	if (last_fb_bytes_sent == 0) {
		last_fb_bytes_sent = now;
		last_call = now;
	}

	if (now <= last_call + 1) {
		/* check every second or so */
		return;
	}

	if (unixpw_in_progress) return;

	last_call = now;

	if (! screen) {
		return;
	}

	iter = rfbGetClientIterator(screen);
	while( (cl = rfbClientIteratorNext(iter)) ) {
#if 0
		rbs += cl->rawBytesEquivalent;
#else
#if LIBVNCSERVER_HAS_STATS
		rbs += rfbStatGetSentBytesIfRaw(cl);
#endif
#endif
	}
	rfbReleaseClientIterator(iter);

	if (rbs != rbs0) {
		rbs0 = rbs;
		if (debug_tiles > 1) {
			fprintf(stderr, "record_last_fb_update: %d %d\n",
			    (int) now, (int) last_fb_bytes_sent);
		}
		last_fb_bytes_sent = now;
	}
}


static int choose_delay(double dt) {
	static double t0 = 0.0, t1 = 0.0, t2 = 0.0, now; 
	static int x0, y0, x1, y1, x2, y2, first = 1;
	int dx0, dy0, dx1, dy1, dm, i, msec = waitms;
	double cut1 = 0.15, cut2 = 0.075, cut3 = 0.25;
	double bogdown_time = 0.25, bave = 0.0;
	int bogdown = 1, bcnt = 0;
	int ndt = 8, nave = 3;
	double fac = 1.0;
	static int db = 0, did_set_defer = 0;
	static double dts[8];
	static int link = LR_UNSET, latency = -1, netrate = -1;
	static double last_link = 0.0;

	if (screen && did_set_defer) {
		/* reset defer in case we changed it */
		screen->deferUpdateTime = defer_update;
	}
	if (waitms == 0) {
		return waitms;
	}
	if (nofb) {
		return waitms;
	}

	if (first) {
		for(i=0; i<ndt; i++) {
			dts[i] = 0.0;
		}
		if (getenv("DEBUG_DELAY")) {
			db = atoi(getenv("DEBUG_DELAY"));
		}
		if (getenv("SET_DEFER")) {
			set_defer = atoi(getenv("SET_DEFER"));
		}
		first = 0;
	}

	now = dnow();

	if (now > last_link + 30.0 || link == LR_UNSET) {
		link = link_rate(&latency, &netrate);
		last_link = now;
	}

	/*
	 * first check for bogdown, e.g. lots of activity, scrolling text
	 * from command output, etc.
	 */
	if (nap_ok) {
		dt = 0.0;
	}
	if (! wait_bog) {
		bogdown = 0;

	} else if (button_mask || now < last_keyboard_time + 2*bogdown_time) {
		/*
		 * let scrolls & keyboard input through the normal way
		 * otherwise, it will likely just annoy them.
		 */
		bogdown = 0;

	} else if (dt > 0.0) {
		/*
		 * inspect recent dt's:
		 * 0 1 2 3 4 5 6 7 dt
		 *             ^ ^ ^
		 */
		for (i = ndt - (nave - 1); i < ndt; i++) {
			bave += dts[i];
			bcnt++;
			if (dts[i] < bogdown_time) {
				bogdown = 0;
				break;
			}
		}
		bave += dt;
		bcnt++;
		bave = bave / bcnt;
		if (dt < bogdown_time) {
			bogdown = 0;
		}
	} else {
		bogdown = 0;
	}
	/* shift for next time */
	for (i = 0; i < ndt-1; i++) {
		dts[i] = dts[i+1];
	}
	dts[ndt-1] = dt;

if (0 && dt > 0.0) fprintf(stderr, "dt: %.5f %.4f\n", dt, dnowx());
	if (bogdown) {
		if (use_xdamage) {
			/* DAMAGE can queue ~1000 rectangles for a scroll */
			clear_xdamage_mark_region(NULL, 0);
		}
		msec = (int) (1000 * 1.75 * bave);
		if (dts[ndt - nave - 1] > 0.75 * bave) {
			msec = 1.5 * msec;
			set_xdamage_mark(0, 0, dpy_x, dpy_y);
		}
		if (msec > 1500) {
			msec = 1500;
		}
		if (msec < waitms) {
			msec = waitms;
		}
		db = (db || debug_tiles);
		if (db) fprintf(stderr, "bogg[%d] %.3f %.3f %.3f %.3f\n",
		    msec, dts[ndt-4], dts[ndt-3], dts[ndt-2], dts[ndt-1]);

		return msec;
	}

	/* next check for pointer motion, keystrokes, to speed up */
	t2 = dnow();
	x2 = cursor_x;
	y2 = cursor_y;

	dx0 = nabs(x1 - x0);
	dy0 = nabs(y1 - y0);
	dx1 = nabs(x2 - x1);
	dy1 = nabs(y2 - y1);

	/* bigger displacement for most recent dt: */
	if (dx1 > dy1) {
		dm = dx1;
	} else {
		dm = dy1;
	}

	if ((dx0 || dy0) && (dx1 || dy1)) {
		/* if mouse moved the previous two times: */
		if (t2 < t0 + cut1 || t2 < t1 + cut2 || dm > 20) {
			/*
			 * if within 0.15s(0) or 0.075s(1) or mouse
			 * moved > 20pixels, set and bump up the cut
			 * down factor.
			 */
			fac = wait_ui * 1.5;
		} else if ((dx1 || dy1) && dm > 40) {
			fac = wait_ui;
		} else {
			/* still 1.0? */
			if (db > 1) fprintf(stderr, "wait_ui: still 1.0\n");
		}
	} else if ((dx1 || dy1) && dm > 40) {
		/* if mouse moved > 40 last time: */
		fac = wait_ui;
	}

	if (fac == 1.0 && t2 < last_keyboard_time + cut3) {
		/* if typed in last 0.25s set wait_ui */
		fac = wait_ui;
	}
	if (fac != 1.0) {
		if (link == LR_LAN || latency <= 3) {
			fac *= 1.5;
		}
	}

	msec = (int) (((double) waitms) / fac);
	if (msec == 0) {
		msec = 1;
	}

	if (set_defer && fac != 1.0 && screen) {
		/* this is wait_ui mode, set defer to match wait: */
		if (set_defer >= 1) {
			screen->deferUpdateTime = msec;
		} else if (set_defer <= -1) {
			screen->deferUpdateTime = 0;
		}
		if (nabs(set_defer) == 2) {
			urgent_update = 1;
		}
		did_set_defer = 1;
	}

	x0 = x1;
	y0 = y1;
	t0 = t1;

	x1 = x2;
	y1 = y2;
	t1 = t2;

	if (db > 1) fprintf(stderr, "wait: %2d defer[%02d]: %2d\n", msec, defer_update, screen->deferUpdateTime);

	return msec;
}

/*
 * main x11vnc loop: polls, checks for events, iterate libvncserver, etc.
 */
void watch_loop(void) {
	int cnt = 0, tile_diffs = 0, skip_pe = 0, wait;
	double tm, dtr, dt = 0.0;
	time_t start = time(NULL);

	if (use_threads) {
		rfbRunEventLoop(screen, -1, TRUE);
	}

	while (1) {
		char msg[] = "new client: %s taking unixpw client off hold.\n";

		got_user_input = 0;
		got_pointer_input = 0;
		got_local_pointer_input = 0;
		got_pointer_calls = 0;
		got_keyboard_input = 0;
		got_keyboard_calls = 0;
		urgent_update = 0;

		x11vnc_current = dnow();

		if (! use_threads) {
			dtime0(&tm);
			if (! skip_pe) {
				if (unixpw_in_progress) {
					rfbClientPtr cl = unixpw_client;
					if (cl && cl->onHold) {
						rfbLog(msg, cl->host);
						unixpw_client->onHold = FALSE;
					}
				} else {
					measure_send_rates(1);
				}

				unixpw_in_rfbPE = 1;

				/*
				 * do a few more since a key press may
				 * have induced a small change we want to
				 * see quickly (just 1 rfbPE will likely
				 * only process the subsequent "up" event)
				 */
				if (tm < last_keyboard_time + 0.16) {
					rfbPE(0);
					rfbPE(0);
					rfbPE(-1);
					rfbPE(0);
					rfbPE(0);
				} else {
					rfbPE(-1);
				}

				unixpw_in_rfbPE = 0;

				if (unixpw_in_progress) {
					/* rfbPE loop until logged in. */
					skip_pe = 0;
					check_new_clients();
					continue;
				} else {
					measure_send_rates(0);
					fb_update_sent(NULL);
				}
			} else {
				if (unixpw_in_progress) {
					skip_pe = 0;
					check_new_clients();
					continue;
				}
			}
			dtr = dtime(&tm);

			if (! cursor_shape_updates) {
				/* undo any cursor shape requests */
				disable_cursor_shape_updates(screen);
			}
			if (screen && screen->clientHead) {
				int ret = check_user_input(dt, dtr,
				    tile_diffs, &cnt);
				/* true: loop back for more input */
				if (ret == 2) {
					skip_pe = 1;
				}
				if (ret) {
					if (debug_scroll) fprintf(stderr, "watch_loop: LOOP-BACK: %d\n", ret);
					continue;
				}
			}
			/* watch for viewonly input piling up: */
			if ((got_pointer_calls > got_pointer_input) ||
			    (got_keyboard_calls > got_keyboard_input)) {
				eat_viewonly_input(10, 3);
			}
		} else {
			/* -threads here. */
			if (wireframe && button_mask) {
				check_wireframe();
			}
		}
		skip_pe = 0;

		if (shut_down) {
			clean_up_exit(0);
		}

		if (unixpw_in_progress) {
			check_new_clients();
			continue;
		}

		if (! urgent_update) {
			if (do_copy_screen) {
				do_copy_screen = 0;
				copy_screen();
			}

			check_new_clients();
			check_ncache(0, 0);
			check_xevents(0);
			check_autorepeat();
			check_pm();
			check_filexfer();
			check_keycode_state();
			check_connect_inputs();
			check_gui_inputs();
			check_stunnel();
			check_openssl();
			check_https();
			record_last_fb_update();
			check_padded_fb();
			check_fixscreen();
			check_xdamage_state();
			check_xrecord_reset(0);
			check_add_keysyms();
			check_new_passwds(0);
#ifdef ENABLE_GRABLOCAL
			if (grab_local) {
				check_local_grab();
			}
#endif
			if (started_as_root) {
				check_switched_user();
			}

			if (first_conn_timeout < 0) {
				start = time(NULL);
				first_conn_timeout = -first_conn_timeout;
			}
		}

		if (rawfb_vnc_reflect) {
			static time_t lastone = 0;
			if (time(NULL) > lastone + 10) {
				lastone = time(NULL);
				vnc_reflect_process_client();
			}
		}

		if (! screen || ! screen->clientHead) {
			/* waiting for a client */
			if (first_conn_timeout) {
				if (time(NULL) - start > first_conn_timeout) {
					rfbLog("No client after %d secs.\n",
					    first_conn_timeout);
					shut_down = 1;
				}
			}
			usleep(200 * 1000);
			continue;
		}

		if (first_conn_timeout && all_clients_initialized()) {
			first_conn_timeout = 0;
		}

		if (nofb) {
			/* no framebuffer polling needed */
			if (cursor_pos_updates) {
				check_x11_pointer();
			}
#ifdef MACOSX
			else check_x11_pointer();
#endif
			continue;
		}

		if (button_mask && (!show_dragging || pointer_mode == 0)) {
			/*
			 * if any button is pressed in this mode do
			 * not update rfb screen, but do flush the
			 * X11 display.
			 */
			X_LOCK;
			XFlush_wr(dpy);
			X_UNLOCK;
			dt = 0.0;
		} else {
			static double last_dt = 0.0;
			double xdamage_thrash = 0.4; 

			check_cursor_changes();

			/* for timing the scan to try to detect thrashing */

			if (use_xdamage && last_dt > xdamage_thrash)  {
				clear_xdamage_mark_region(NULL, 0);
			}

			if (unixpw_in_progress) continue;

			if (rawfb_vnc_reflect) {
				vnc_reflect_process_client();
			}
			dtime0(&tm);

#if !NO_X11
			if (xrandr_present && !xrandr && xrandr_maybe) {
				int delay = 180;
				/*  there may be xrandr right after xsession start */
				if (tm < x11vnc_start + delay || tm < last_client + delay) {
					int tw = 20;
					if (auth_file != NULL) {
						tw = 120;
					}
					X_LOCK;
					if (tm < x11vnc_start + tw || tm < last_client + tw) {
						XSync(dpy, False);
					} else {
						XFlush_wr(dpy);
					}
					X_UNLOCK;
				}
				check_xrandr_event("before-scan");
			}
#endif
			if (use_snapfb) {
				int t, tries = 3;
				copy_snap();
				for (t=0; t < tries; t++) {
					tile_diffs = scan_for_updates(0);
				}
			} else {
				tile_diffs = scan_for_updates(0);
			}
			dt = dtime(&tm);
			if (! nap_ok) {
				last_dt = dt;
			}

			if ((debug_tiles || debug_scroll > 1 || debug_wireframe > 1)
			    && (tile_diffs > 4 || debug_tiles > 1)) {
				double rate = (tile_x * tile_y * bpp/8 * tile_diffs) / dt;
				fprintf(stderr, "============================= TILES: %d  dt: %.4f"
				    "  t: %.4f  %.2f MB/s nap_ok: %d\n", tile_diffs, dt,
				    tm - x11vnc_start, rate/1000000.0, nap_ok);
			}

		}

		/* sleep a bit to lessen load */
		wait = choose_delay(dt);
		if (urgent_update) {
			;
		} else if (wait > 2*waitms) {
			/* bog case, break it up */
			nap_sleep(wait, 10);
		} else {
			usleep(wait * 1000);
		}

		cnt++;
	}
}