text: /*
   * $Xorg: xdpyinfo.c,v 1.5 2001/02/09 02:05:41 xorgcvs Exp $
   * 
   * xdpyinfo - print information about X display connection
   *
   * 
  Copyright 1988, 1998  The Open Group
  Copyright 2005 Hitachi, Ltd.
  
  Permission to use, copy, modify, distribute, and sell this software and its
  documentation for any purpose is hereby granted without fee, provided that
  the above copyright notice appear in all copies and that both that
  copyright notice and this permission notice appear in supporting
  documentation.
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  Except as contained in this notice, the name of The Open Group shall not be
  used in advertising or otherwise to promote the sale, use or other dealings
  in this Software without prior written authorization from The Open Group.
   *
   * Author:  Jim Fulton, MIT X Consortium
   */
  
  /* $XFree86: xc/programs/xdpyinfo/xdpyinfo.c,v 3.29 2003/04/14 20:38:10 herrb Exp $ */
  
  #ifdef HAVE_CONFIG_H
  # include "config.h"
  # if HAVE_X11_EXTENSIONS_MULTIBUF_H
  #  define MULTIBUFFER
  # endif
  
  # if HAVE_X11_EXTENSIONS_XSHM_H
  #  define MITSHM
  # endif
  
  # if HAVE_X11_EXTENSIONS_XKB_H && HAVE_X11_XKBLIB_H
  #  define XKB
  # endif
  
  # if HAVE_X11_EXTENSIONS_XF86VMODE_H && HAVE_X11_EXTENSIONS_XF86VMSTR_H
  #  define XF86VIDMODE
  # endif
  
  # if HAVE_X11_EXTENSIONS_XF86DGA_H && HAVE_X11_EXTENSIONS_XF86DGASTR_H
  #  define XFreeXDGA
  # endif
  
  # if HAVE_X11_EXTENSIONS_XF86MISC_H && HAVE_X11_EXTENSIONS_XF86MSCSTR_H
  #  define XF86MISC
  # endif
  
  # if HAVE_X11_EXTENSIONS_XINPUT_H
  #  define XINPUT
  # endif
  
  # if HAVE_X11_EXTENSIONS_XRENDER_H
  #  define XRENDER
  # endif
  
  # if HAVE_X11_EXTENSIONS_XINERAMA_H
  #  define PANORAMIX
  # endif
  
  # if HAVE_X11_EXTENSIONS_DMXEXT_H
  #  define DMX
  # endif
  
  # if HAVE_X11_EXTENSIONS_PRINT_H
  #  define INCLUDE_XPRINT_SUPPORT
  # endif
  
  #endif
  
  #include <X11/Xlib.h>
  #include <X11/Xutil.h>
  #ifdef MULTIBUFFER
  #include <X11/extensions/multibuf.h>
  #endif
  #include <X11/extensions/XTest.h>
  #include <X11/extensions/sync.h>
  #include <X11/Xproto.h>
  #include <X11/extensions/Xdbe.h>
  #include <X11/extensions/record.h>
  #include <X11/extensions/shape.h>
  #ifdef MITSHM
  #include <X11/extensions/XShm.h>
  #endif
  #ifdef XKB
  #include <X11/extensions/XKB.h>
  #include <X11/XKBlib.h>
  #endif
  #ifdef XF86VIDMODE
  #include <X11/extensions/xf86vmode.h>
  #include <X11/extensions/xf86vmstr.h>
  #endif
  #ifdef XFreeXDGA
  #include <X11/extensions/xf86dga.h>
  #include <X11/extensions/xf86dgastr.h>
  #endif
  #ifdef XF86MISC
  #include <X11/extensions/xf86misc.h>
  #include <X11/extensions/xf86mscstr.h>
  #endif
  #ifdef XINPUT
  #include <X11/extensions/XInput.h>
  #endif
  #ifdef XRENDER
  #include <X11/extensions/Xrender.h>
  #endif
  #ifdef PANORAMIX
  #include <X11/extensions/Xinerama.h>
  #endif
  #ifdef DMX
  #include <X11/extensions/dmxext.h>
  #endif
  #ifdef INCLUDE_XPRINT_SUPPORT
  #include <X11/extensions/Print.h>
  #endif /* INCLUDE_XPRINT_SUPPORT */
  #include <X11/Xos.h>
  #include <stdio.h>
  #include <stdlib.h>
  
  /* Turn a NULL pointer string into an empty string */
  #define NULLSTR(x) (((x)!=NULL)?(x):(""))
  
  char *ProgramName;
  Bool queryExtensions = False;
  
  static int print_event_mask(char *buf, int lastcol, int indent, long mask);
  
  static int StrCmp(const void *a, const  void *b)
  {
      return strcmp(*(char **)a, *(char **)b);
  }
  
  static void
  print_extension_info(Display *dpy)
  {
      int n = 0;
      char **extlist = XListExtensions (dpy, &n);
  
      printf ("number of extensions:    %d\n", n);
  
      if (extlist) {
  	register int i;
  	int opcode, event, error;
  
  	qsort(extlist, n, sizeof(char *), StrCmp);
  	for (i = 0; i < n; i++) {
  	    if (!queryExtensions) {
  		printf ("    %s\n", extlist[i]);
  		continue;
  	    }
  	    XQueryExtension(dpy, extlist[i], &opcode, &event, &error);
  	    printf ("    %s  (opcode: %d", extlist[i], opcode);
  	    if (event)
  		printf (", base event: %d", event);
  	    if (error)
  		printf (", base error: %d", error);
  	    printf(")\n");
  	}
  	/* do not free, Xlib can depend on contents being unaltered */
  	/* XFreeExtensionList (extlist); */
      }
  }
  
  static void
  print_display_info(Display *dpy)
  {
      char dummybuf[40];
      char *cp;
      int minkeycode, maxkeycode;
      int i, n;
      long req_size;
      XPixmapFormatValues *pmf;
      Window focuswin;
      int focusrevert;
  
      printf ("name of display:    %s\n", DisplayString (dpy));
      printf ("version number:    %d.%d\n",
  	    ProtocolVersion (dpy), ProtocolRevision (dpy));
      printf ("vendor string:    %s\n", ServerVendor (dpy));
      printf ("vendor release number:    %d\n", VendorRelease (dpy));
  
      if (strstr(ServerVendor (dpy), "XFree86")) {
  	int vendrel = VendorRelease(dpy);
  
  	printf("XFree86 version: ");
  	if (vendrel < 336) {
  	    /*
  	     * vendrel was set incorrectly for 3.3.4 and 3.3.5, so handle
  	     * those cases here.
  	     */
  	    printf("%d.%d.%d", vendrel / 100,
  			      (vendrel / 10) % 10,
  			       vendrel       % 10);
  	} else if (vendrel < 3900) {
  	    /* 3.3.x versions, other than the exceptions handled above */
  	    printf("%d.%d", vendrel / 1000,
  			   (vendrel /  100) % 10);
  	    if (((vendrel / 10) % 10) || (vendrel % 10)) {
  		printf(".%d", (vendrel / 10) % 10);
  		if (vendrel % 10) {
  		    printf(".%d", vendrel % 10);
  		}
  	    }
  	} else if (vendrel < 40000000) {
  	    /* 4.0.x versions */
  	    printf("%d.%d", vendrel / 1000,
  			   (vendrel /   10) % 10);
  	    if (vendrel % 10) {
  		printf(".%d", vendrel % 10);
  	    }
  	} else {
  	    /* post-4.0.x */
  	    printf("%d.%d.%d", vendrel / 10000000,
  			      (vendrel /   100000) % 100,
  			      (vendrel /     1000) % 100);
  	    if (vendrel % 1000) {
  		printf(".%d", vendrel % 1000);
  	    }
  	}
  	printf("\n");
      }
  
      if (strstr(ServerVendor (dpy), "X.Org")) {
  	int vendrel = VendorRelease(dpy);
  
  	printf("X.Org version: ");
  	printf("%d.%d.%d", vendrel / 10000000,
  	       (vendrel /   100000) % 100,
  	       (vendrel /     1000) % 100);
  	if (vendrel % 1000)
  	    printf(".%d", vendrel % 1000);
  	printf("\n");
      }
  
      if (strstr(ServerVendor (dpy), "DMX")) {
  	int vendrel = VendorRelease(dpy);
          int major, minor, year, month, day;
  
          major    = vendrel / 100000000;
          vendrel -= major   * 100000000;
          minor    = vendrel /   1000000;
          vendrel -= minor   *   1000000;
          year     = vendrel /     10000;
          vendrel -= year    *     10000;
          month    = vendrel /       100;
          vendrel -= month   *       100;
          day      = vendrel;
  
                                  /* Add other epoch tests here */
          if (major > 0 && minor > 0) year += 2000;
  
                                  /* Do some sanity tests in case there is
                                   * another server with the same vendor
                                   * string.  That server could easily use
                                   * values < 100000000, which would have
                                   * the effect of keeping our major
                                   * number 0. */
          if (major > 0 && major <= 20
              && minor >= 0 && minor <= 99
              && year >= 2000
              && month >= 1 && month <= 12
              && day >= 1 && day <= 31)
              printf("DMX version: %d.%d.%04d%02d%02d\n",
                     major, minor, year, month, day);
      }
  
      req_size = XExtendedMaxRequestSize (dpy);
      if (!req_size) req_size = XMaxRequestSize (dpy);
      printf ("maximum request size:  %ld bytes\n", req_size * 4);
      printf ("motion buffer size:  %ld\n", XDisplayMotionBufferSize (dpy));
  
      switch (BitmapBitOrder (dpy)) {
        case LSBFirst:    cp = "LSBFirst"; break;
        case MSBFirst:    cp = "MSBFirst"; break;
        default:    
  	sprintf (dummybuf, "unknown order %d", BitmapBitOrder (dpy));
  	cp = dummybuf;
  	break;
      }
      printf ("bitmap unit, bit order, padding:    %d, %s, %d\n",
  	    BitmapUnit (dpy), cp, BitmapPad (dpy));
  
      switch (ImageByteOrder (dpy)) {
        case LSBFirst:    cp = "LSBFirst"; break;
        case MSBFirst:    cp = "MSBFirst"; break;
        default:    
  	sprintf (dummybuf, "unknown order %d", ImageByteOrder (dpy));
  	cp = dummybuf;
  	break;
      }
      printf ("image byte order:    %s\n", cp);
  
      pmf = XListPixmapFormats (dpy, &n);
      printf ("number of supported pixmap formats:    %d\n", n);
      if (pmf) {
  	printf ("supported pixmap formats:\n");
  	for (i = 0; i < n; i++) {
  	    printf ("    depth %d, bits_per_pixel %d, scanline_pad %d\n",
  		    pmf[i].depth, pmf[i].bits_per_pixel, pmf[i].scanline_pad);
  	}
  	XFree ((char *) pmf);
      }
  
  
      /*
       * when we get interfaces to the PixmapFormat stuff, insert code here
       */
  
      XDisplayKeycodes (dpy, &minkeycode, &maxkeycode);
      printf ("keycode range:    minimum %d, maximum %d\n",
  	    minkeycode, maxkeycode);
  
      XGetInputFocus (dpy, &focuswin, &focusrevert);
      printf ("focus:  ");
      switch (focuswin) {
        case PointerRoot:
  	printf ("PointerRoot\n");
  	break;
        case None:
  	printf ("None\n");
  	break;
        default:
  	printf("window 0x%lx, revert to ", focuswin);
  	switch (focusrevert) {
  	  case RevertToParent:
  	    printf ("Parent\n");
  	    break;
  	  case RevertToNone:
  	    printf ("None\n");
  	    break;
  	  case RevertToPointerRoot:
  	    printf ("PointerRoot\n");
  	    break;
  	  default:			/* should not happen */
  	    printf ("%d\n", focusrevert);
  	    break;
  	}
  	break;
      }
  
      print_extension_info (dpy);
  
      printf ("default screen number:    %d\n", DefaultScreen (dpy));
      printf ("number of screens:    %d\n", ScreenCount (dpy));
  }
  
  static void
  print_visual_info(XVisualInfo *vip)
  {
      char errorbuf[40];			/* for sprintfing into */
      char *class = NULL;			/* for printing */
  
      switch (vip->class) {
        case StaticGray:    class = "StaticGray"; break;
        case GrayScale:    class = "GrayScale"; break;
        case StaticColor:    class = "StaticColor"; break;
        case PseudoColor:    class = "PseudoColor"; break;
        case TrueColor:    class = "TrueColor"; break;
        case DirectColor:    class = "DirectColor"; break;
        default:    
  	sprintf (errorbuf, "unknown class %d", vip->class);
  	class = errorbuf;
  	break;
      }
  
      printf ("  visual:\n");
      printf ("    visual id:    0x%lx\n", vip->visualid);
      printf ("    class:    %s\n", class);
      printf ("    depth:    %d plane%s\n", vip->depth, 
  	    vip->depth == 1 ? "" : "s");
      if (vip->class == TrueColor || vip->class == DirectColor)
  	printf ("    available colormap entries:    %d per subfield\n",
  		vip->colormap_size);
      else
  	printf ("    available colormap entries:    %d\n",
  		vip->colormap_size);
      printf ("    red, green, blue masks:    0x%lx, 0x%lx, 0x%lx\n",
  	    vip->red_mask, vip->green_mask, vip->blue_mask);
      printf ("    significant bits in color specification:    %d bits\n",
  	    vip->bits_per_rgb);
  }
  
  /* xc/programs/twm/twm.c has a copy of |hasExtension()|, please
   * keep both versions in sync... */
  static
  Bool hasExtension(Display *dpy, char *extname)
  {
    int    num_extensions,
           i;
    char **extensions;
    extensions = XListExtensions(dpy, &num_extensions);
    for (i = 0; i < num_extensions &&
           (strcmp(extensions[i], extname) != 0); i++);
    XFreeExtensionList(extensions);
    return i != num_extensions;
  }
  
  #ifdef INCLUDE_XPRINT_SUPPORT
  /* xc/programs/twm/twm.c has a copy of |IsPrintScreen()|, please
   * keep both versions in sync... */
  static
  Bool IsPrintScreen(Screen *s)
  {
      Display *dpy = XDisplayOfScreen(s);
      int      i;
  
      /* Check whether this is a screen of a print DDX */
      if (hasExtension(dpy, XP_PRINTNAME)) {
          Screen **pscreens;
          int      pscrcount;
  
          pscreens = XpQueryScreens(dpy, &pscrcount);
          for( i = 0 ; (i < pscrcount) && pscreens ; i++ ) {
              if (s == pscreens[i]) {
                  XFree(pscreens);
                  return True;
              }
          }
          XFree(pscreens);                      
      }
      return False;
  }
  #endif /* INCLUDE_XPRINT_SUPPORT */
  
  static void
  print_screen_info(Display *dpy, int scr)
  {
      Screen *s = ScreenOfDisplay (dpy, scr);  /* opaque structure */
      XVisualInfo viproto;		/* fill in for getting info */
      XVisualInfo *vip;			/* returned info */
      int nvi;				/* number of elements returned */
      int i;				/* temp variable: iterator */
      char eventbuf[80];			/* want 79 chars per line + nul */
      static char *yes = "YES", *no = "NO", *when = "WHEN MAPPED";
      double xres, yres;
      int ndepths = 0, *depths = NULL;
      unsigned int width, height;
      Bool isPrintScreen = False; /* Initialise this if |INCLUDE_XPRINT_SUPPORT| is not set */
  
      /*
       * there are 2.54 centimeters to an inch; so there are 25.4 millimeters.
       *
       *     dpi = N pixels / (M millimeters / (25.4 millimeters / 1 inch))
       *         = N pixels / (M inch / 25.4)
       *         = N * 25.4 pixels / M inch
       */
  
      xres = ((((double) DisplayWidth(dpy,scr)) * 25.4) / 
  	    ((double) DisplayWidthMM(dpy,scr)));
      yres = ((((double) DisplayHeight(dpy,scr)) * 25.4) / 
  	    ((double) DisplayHeightMM(dpy,scr)));
  
      printf ("\n");
      printf ("screen #%d:\n", scr);
  
  #ifdef INCLUDE_XPRINT_SUPPORT
      /* Check whether this is a screen of a print DDX */
      isPrintScreen = IsPrintScreen(s);
      printf ("  print screen:    %s\n", isPrintScreen?"yes":"no");
  #endif /* INCLUDE_XPRINT_SUPPORT */
  
      if (isPrintScreen) {
          /* Print resolution is set on a per-printer basis (per-document
           * or per-page), the screen itself has no "default" resolution */
          printf ("  maximum dimensions:    %dx%d pixels\n",
  	        XDisplayWidth (dpy, scr),  XDisplayHeight (dpy, scr));
      }
      else
      {
          printf ("  dimensions:    %dx%d pixels (%dx%d millimeters)\n",
  	        XDisplayWidth (dpy, scr),  XDisplayHeight (dpy, scr),
  	        XDisplayWidthMM(dpy, scr), XDisplayHeightMM (dpy, scr));
          printf ("  resolution:    %dx%d dots per inch\n", 
  	        (int) (xres + 0.5), (int) (yres + 0.5));
      }
      depths = XListDepths (dpy, scr, &ndepths);
      if (!depths) ndepths = 0;
      printf ("  depths (%d):    ", ndepths);
      for (i = 0; i < ndepths; i++) {
  	printf ("%d", depths[i]);
  	if (i < ndepths - 1) { 
  	    putchar (',');
  	    putchar (' ');
  	}
      }
      putchar ('\n');
      if (depths) XFree ((char *) depths);
      printf ("  root window id:    0x%lx\n", RootWindow (dpy, scr));
      printf ("  depth of root window:    %d plane%s\n",
  	    DisplayPlanes (dpy, scr),
  	    DisplayPlanes (dpy, scr) == 1 ? "" : "s");
      printf ("  number of colormaps:    minimum %d, maximum %d\n",
  	    MinCmapsOfScreen(s), MaxCmapsOfScreen(s));
      printf ("  default colormap:    0x%lx\n", DefaultColormap (dpy, scr));
      printf ("  default number of colormap cells:    %d\n",
  	    DisplayCells (dpy, scr));
      printf ("  preallocated pixels:    black %ld, white %ld\n",
  	    BlackPixel (dpy, scr), WhitePixel (dpy, scr));
      printf ("  options:    backing-store %s, save-unders %s\n",
  	    (DoesBackingStore (s) == NotUseful) ? no :
  	    ((DoesBackingStore (s) == Always) ? yes : when),
  	    DoesSaveUnders (s) ? yes : no);
      XQueryBestSize (dpy, CursorShape, RootWindow (dpy, scr), 65535, 65535,
  		    &width, &height);
      if (width == 65535 && height == 65535)
  	printf ("  largest cursor:    unlimited\n");
      else
  	printf ("  largest cursor:    %dx%d\n", width, height);
      printf ("  current input event mask:    0x%lx\n", EventMaskOfScreen (s));
      (void) print_event_mask (eventbuf, 79, 4, EventMaskOfScreen (s));
  
      nvi = 0;
      viproto.screen = scr;
      vip = XGetVisualInfo (dpy, VisualScreenMask, &viproto, &nvi);
      printf ("  number of visuals:    %d\n", nvi);
      printf ("  default visual id:  0x%lx\n", 
  	    XVisualIDFromVisual (DefaultVisual (dpy, scr)));
      for (i = 0; i < nvi; i++) {
  	print_visual_info (vip+i);
      }
      if (vip) XFree ((char *) vip);
  }
  
  /*
   * The following routine prints out an event mask, wrapping events at nice
   * boundaries.
   */
  
  #define MASK_NAME_WIDTH 25
  
  static struct _event_table {
      char *name;
      long value;
  } event_table[] = {
      { "KeyPressMask             ", KeyPressMask },
      { "KeyReleaseMask           ", KeyReleaseMask },
      { "ButtonPressMask          ", ButtonPressMask },
      { "ButtonReleaseMask        ", ButtonReleaseMask },
      { "EnterWindowMask          ", EnterWindowMask },
      { "LeaveWindowMask          ", LeaveWindowMask },
      { "PointerMotionMask        ", PointerMotionMask },
      { "PointerMotionHintMask    ", PointerMotionHintMask },
      { "Button1MotionMask        ", Button1MotionMask },
      { "Button2MotionMask        ", Button2MotionMask },
      { "Button3MotionMask        ", Button3MotionMask },
      { "Button4MotionMask        ", Button4MotionMask },
      { "Button5MotionMask        ", Button5MotionMask },
      { "ButtonMotionMask         ", ButtonMotionMask },
      { "KeymapStateMask          ", KeymapStateMask },
      { "ExposureMask             ", ExposureMask },
      { "VisibilityChangeMask     ", VisibilityChangeMask },
      { "StructureNotifyMask      ", StructureNotifyMask },
      { "ResizeRedirectMask       ", ResizeRedirectMask },
      { "SubstructureNotifyMask   ", SubstructureNotifyMask },
      { "SubstructureRedirectMask ", SubstructureRedirectMask },
      { "FocusChangeMask          ", FocusChangeMask },
      { "PropertyChangeMask       ", PropertyChangeMask },
      { "ColormapChangeMask       ", ColormapChangeMask },
      { "OwnerGrabButtonMask      ", OwnerGrabButtonMask },
      { NULL, 0 }};
  
  static int                      
  print_event_mask(char *buf,     /* string to write into */
                   int lastcol,   /* strlen(buf)+1 */
                   int indent,    /* amount by which to indent */
                   long mask)     /* event mask */
  {
      struct _event_table *etp;
      int len;
      int bitsfound = 0;
  
      buf[0] = buf[lastcol] = '\0';	/* just in case */
  
  #define INDENT() { register int i; len = indent; \
  		   for (i = 0; i < indent; i++) buf[i] = ' '; }
  
      INDENT ();
  
      for (etp = event_table; etp->name; etp++) {
  	if (mask & etp->value) {
  	    if (len + MASK_NAME_WIDTH > lastcol) {
  		puts (buf);
  		INDENT ();
  	    }
  	    strcpy (buf+len, etp->name);
  	    len += MASK_NAME_WIDTH;
  	    bitsfound++;
  	}
      }
  
      if (bitsfound) puts (buf);
  
  #undef INDENT
  
      return (bitsfound);
  }
  
  static void
  print_standard_extension_info(Display *dpy, char *extname, 
  			      int majorrev, int minorrev)
  {
      int opcode, event, error;
  
      printf("%s version %d.%d ", extname, majorrev, minorrev);
  
      XQueryExtension(dpy, extname, &opcode, &event, &error);
      printf ("opcode: %d", opcode);
      if (event)
  	printf (", base event: %d", event);
      if (error)
  	printf (", base error: %d", error);
      printf("\n");
  }
  
  #ifdef MULTIBUFFER
  static int
  print_multibuf_info(Display *dpy, char *extname)
  {
      int i, j;			/* temp variable: iterator */
      int nmono, nstereo;		/* count */
      XmbufBufferInfo *mono_info = NULL, *stereo_info = NULL; /* arrays */
      static char *fmt = 
  	"    visual id, max buffers, depth:    0x%lx, %d, %d\n";
      int scr = 0;
      int majorrev, minorrev;
  
      if (!XmbufGetVersion(dpy, &majorrev, &minorrev))
  	return 0;
  
      print_standard_extension_info(dpy, extname, majorrev, minorrev);
  
      for (i = 0; i < ScreenCount (dpy); i++)
      {
  	if (!XmbufGetScreenInfo (dpy, RootWindow(dpy, scr), &nmono, &mono_info,
  				 &nstereo, &stereo_info)) {
  	    fprintf (stderr,
  		     "%s:  unable to get multibuffer info for screen %d\n",
  		     ProgramName, scr);
  	} else {
  	    printf ("  screen %d number of mono multibuffer types:    %d\n", i, nmono);
  	    for (j = 0; j < nmono; j++) {
  		printf (fmt, mono_info[j].visualid, mono_info[j].max_buffers,
  			mono_info[j].depth);
  	    }
  	    printf ("  number of stereo multibuffer types:    %d\n", nstereo);
  	    for (j = 0; j < nstereo; j++) {
  		printf (fmt, stereo_info[j].visualid,
  			stereo_info[j].max_buffers, stereo_info[j].depth);
  	    }
  	    if (mono_info) XFree ((char *) mono_info);
  	    if (stereo_info) XFree ((char *) stereo_info);
  	}
      }
      return 1;
  } /* end print_multibuf_info */
  #endif
  
  static int
  print_xtest_info(Display *dpy, char *extname)
  {
      int majorrev, minorrev, foo;
  
      if (!XTestQueryExtension(dpy, &foo, &foo, &majorrev, &minorrev))
  	return 0;
      print_standard_extension_info(dpy, extname, majorrev, minorrev);
      return 1;
  }
  
  static int
  print_sync_info(Display *dpy, char *extname)
  {
      int majorrev, minorrev;
      XSyncSystemCounter *syscounters;
      int ncounters, i;
  
      if (!XSyncInitialize(dpy, &majorrev, &minorrev))
  	return 0;
      print_standard_extension_info(dpy, extname, majorrev, minorrev);
  
      syscounters = XSyncListSystemCounters(dpy, &ncounters);
      printf("  system counters: %d\n", ncounters);
      for (i = 0; i < ncounters; i++)
      {
  	printf("    %s  id: 0x%08x  resolution_lo: %d  resolution_hi: %d\n",
  	       syscounters[i].name, (unsigned int)syscounters[i].counter,
  	       XSyncValueLow32(syscounters[i].resolution),
  	       XSyncValueHigh32(syscounters[i].resolution));
      }
      XSyncFreeSystemCounterList(syscounters);
      return 1;
  }
  
  static int
  print_shape_info(Display *dpy, char *extname)
  {
      int majorrev, minorrev;
  
      if (!XShapeQueryVersion(dpy, &majorrev, &minorrev))
  	return 0;
      print_standard_extension_info(dpy, extname, majorrev, minorrev);
      return 1;
  }
  
  #ifdef XFreeXDGA
  static int
  print_dga_info(Display *dpy, char *extname)
  {
      int majorrev, minorrev, width, bank, ram, offset, flags;
  
      if (!XF86DGAQueryVersion(dpy, &majorrev, &minorrev))
  	return 0;
      print_standard_extension_info(dpy, extname, majorrev, minorrev);
  
      if (!XF86DGAQueryDirectVideo(dpy, DefaultScreen(dpy), &flags) 
  	|| ! (flags & XF86DGADirectPresent) )
      {
  	printf("  DGA not available on screen %d.\n", DefaultScreen(dpy));
  	return 1;
      }
  
      if (!XF86DGAGetVideoLL(dpy, DefaultScreen(dpy), &offset,
  			    &width, &bank, &ram))
  	return 0;
      printf("  Base address = 0x%X, Width = %d, Bank size = %d,"
  	   " RAM size = %dk\n", offset, width, bank, ram);
  
      return 1;
  }
  #endif
  
  #ifdef XF86VIDMODE
  #define V_PHSYNC        0x001 
  #define V_NHSYNC        0x002
  #define V_PVSYNC        0x004
  #define V_NVSYNC        0x008
  #define V_INTERLACE     0x010 
  #define V_DBLSCAN       0x020
  #define V_CSYNC         0x040
  #define V_PCSYNC        0x080
  #define V_NCSYNC        0x100
  
  static int
  print_XF86VidMode_info(Display *dpy, char *extname)
  {
      int majorrev, minorrev, modecount, dotclock, i;
      XF86VidModeMonitor monitor;
      XF86VidModeModeLine modeline;
      XF86VidModeModeInfo **modelines;
  
      if (!XF86VidModeQueryVersion(dpy, &majorrev, &minorrev))
  	return 0;
      print_standard_extension_info(dpy, extname, majorrev, minorrev);
  
      if (!XF86VidModeGetMonitor(dpy, DefaultScreen(dpy), &monitor))
  	return 0;
      printf("  Monitor Information:\n");
      printf("    Vendor: %s, Model: %s\n", monitor.vendor, monitor.model);
      printf("    Num hsync: %d, Num vsync: %d\n", monitor.nhsync, monitor.nvsync);
      for (i = 0; i < monitor.nhsync; i++) {
          printf("    hsync range %d: %6.2f - %6.2f\n", i, monitor.hsync[i].lo,
                 monitor.hsync[i].hi);
      }
      for (i = 0; i < monitor.nvsync; i++) {
          printf("    vsync range %d: %6.2f - %6.2f\n", i, monitor.vsync[i].lo,
                 monitor.vsync[i].hi);
      }
      XFree(monitor.vendor);
      XFree(monitor.model);
      XFree(monitor.hsync);
      XFree(monitor.vsync);
  
      if ((majorrev > 0) || (majorrev == 0 && minorrev > 5)) {
        if (!XF86VidModeGetAllModeLines(dpy, DefaultScreen(dpy), &modecount,
  				      &modelines))
  	return 0;
        printf("  Available Video Mode Settings:\n");
        printf("     Clock   Hdsp Hbeg Hend Httl   Vdsp Vbeg Vend Vttl  Flags\n");
        for (i = 0; i < modecount; i++) {
          printf("    %6.2f   %4d %4d %4d %4d   %4d %4d %4d %4d ",
              (float)modelines[i]->dotclock/1000.0,
              modelines[i]->hdisplay, modelines[i]->hsyncstart,
              modelines[i]->hsyncend, modelines[i]->htotal,
              modelines[i]->vdisplay, modelines[i]->vsyncstart,
              modelines[i]->vsyncend, modelines[i]->vtotal);
          if (modelines[i]->flags & V_PHSYNC)    printf(" +hsync");
          if (modelines[i]->flags & V_NHSYNC)    printf(" -hsync");
          if (modelines[i]->flags & V_PVSYNC)    printf(" +vsync");
          if (modelines[i]->flags & V_NVSYNC)    printf(" -vsync");
          if (modelines[i]->flags & V_INTERLACE) printf(" interlace");
          if (modelines[i]->flags & V_CSYNC)     printf(" composite");
          if (modelines[i]->flags & V_PCSYNC)    printf(" +csync");
          if (modelines[i]->flags & V_PCSYNC)    printf(" -csync");
          if (modelines[i]->flags & V_DBLSCAN)   printf(" doublescan");
          printf("\n");
        }
        XFree(modelines);
  
        if (!XF86VidModeGetModeLine(dpy, DefaultScreen(dpy),
  				  &dotclock, &modeline))
  	return 0;
        printf("  Current Video Mode Setting:\n");
        printf("    %6.2f   %4d %4d %4d %4d   %4d %4d %4d %4d ",
  	     (float)dotclock/1000.0,
  	     modeline.hdisplay, modeline.hsyncstart,
  	     modeline.hsyncend, modeline.htotal,
  	     modeline.vdisplay, modeline.vsyncstart,
  	     modeline.vsyncend, modeline.vtotal);
        if (modeline.flags & V_PHSYNC)    printf(" +hsync");
        if (modeline.flags & V_NHSYNC)    printf(" -hsync");
        if (modeline.flags & V_PVSYNC)    printf(" +vsync");
        if (modeline.flags & V_NVSYNC)    printf(" -vsync");
        if (modeline.flags & V_INTERLACE) printf(" interlace");
        if (modeline.flags & V_CSYNC)     printf(" composite");
        if (modeline.flags & V_PCSYNC)    printf(" +csync");
        if (modeline.flags & V_PCSYNC)    printf(" -csync");
        if (modeline.flags & V_DBLSCAN)   printf(" doublescan");
        printf("\n");
      }
  
      return 1;
  }
  #endif
  
  #ifdef XF86MISC
  
  char *kbdtable[] = { "Unknown", "84-key", "101-key", "Other", "Xqueue" };
  char *msetable[] = { "None", "Microsoft", "MouseSystems", "MMSeries",
  		     "Logitech", "BusMouse", "Mouseman", "PS/2", "MMHitTab",
  		     "GlidePoint", "IntelliMouse", "ThinkingMouse",
  		     "IMPS/2", "ThinkingMousePS/2", "MouseManPlusPS/2",
  		     "GlidePointPS/2", "NetMousePS/2", "NetScrollPS/2",
  		     "SysMouse", "Auto" };
  char *flgtable[] = { "None", "ClearDTR", "ClearRTS",
  		     "ClearDTR and ClearRTS" };
  
  static int
  print_XF86Misc_info(Display *dpy, char *extname)
  {
      int majorrev, minorrev;
      XF86MiscMouseSettings mouseinfo;
      XF86MiscKbdSettings kbdinfo;
  
      if (!XF86MiscQueryVersion(dpy, &majorrev, &minorrev))
  	return 0;
      print_standard_extension_info(dpy, extname, majorrev, minorrev);
  
      if ((majorrev > 0) || (majorrev == 0 && minorrev > 0)) {
        if (!XF86MiscGetKbdSettings(dpy, &kbdinfo))
  	return 0;
        printf("  Keyboard Settings-    Type: %s, Rate: %d, Delay: %d, ServerNumLock: %s\n",
  	kbdtable[kbdinfo.type], kbdinfo.rate, kbdinfo.delay,
  	(kbdinfo.servnumlock? "yes": "no"));
  
        if (!XF86MiscGetMouseSettings(dpy, &mouseinfo))
  	return 0;
        printf("  Mouse Settings-       Device: %s, Type: ",
  	strlen(mouseinfo.device) == 0 ? "None": mouseinfo.device);
        XFree(mouseinfo.device);
        if (mouseinfo.type == MTYPE_XQUEUE)
  	printf("Xqueue\n");
        else if (mouseinfo.type == MTYPE_OSMOUSE)
  	printf("OSMouse\n");
        else if (mouseinfo.type <= MTYPE_AUTOMOUSE)
  	printf("%s\n", msetable[mouseinfo.type+1]);
        else
  	printf("Unknown\n");
        printf("                        BaudRate: %d, SampleRate: %d, Resolution: %d\n",
  	mouseinfo.baudrate, mouseinfo.samplerate, mouseinfo.resolution);
        printf("                        Emulate3Buttons: %s, Emulate3Timeout: %d ms\n",
  	mouseinfo.emulate3buttons? "yes": "no", mouseinfo.emulate3timeout);
        printf("                        ChordMiddle: %s, Flags: %s\n",
  	mouseinfo.chordmiddle? "yes": "no",
  	flgtable[(mouseinfo.flags & MF_CLEAR_DTR? 1: 0)
  		+(mouseinfo.flags & MF_CLEAR_RTS? 1: 0)] );
        printf("                        Buttons: %d\n", mouseinfo.buttons);
      }
  
      return 1;
  }
  #endif
  
  #ifdef MITSHM
  static int
  print_mitshm_info(Display *dpy, char *extname)
  {
      int majorrev, minorrev;
      Bool sharedPixmaps;
  
      if (!XShmQueryVersion(dpy, &majorrev, &minorrev, &sharedPixmaps))
  	return 0;
      print_standard_extension_info(dpy, extname, majorrev, minorrev);
      printf("  shared pixmaps: ");
      if (sharedPixmaps)
      {
  	int format = XShmPixmapFormat(dpy);
  	printf("yes, format: %d\n", format);
      }
      else
      {
  	printf("no\n");
      }
      return 1;
  }
  #endif /* MITSHM */
  
  #ifdef XKB
  static int
  print_xkb_info(Display *dpy, char *extname)
  {
      int opcode, eventbase, errorbase, majorrev, minorrev;
  
      if (!XkbQueryExtension(dpy, &opcode, &eventbase, &errorbase,
  			   &majorrev, &minorrev)) {
          return 0;
      }
      printf("%s version %d.%d ", extname, majorrev, minorrev);
  
      printf ("opcode: %d", opcode);
      if (eventbase)
  	printf (", base event: %d", eventbase);
      if (errorbase)
  	printf (", base error: %d", errorbase);
      printf("\n");
  
      return 1;
  }
  #endif
  
  static int
  print_dbe_info(Display *dpy, char *extname)
  {
      int majorrev, minorrev;
      XdbeScreenVisualInfo *svi;
      int numscreens = 0;
      int iscrn, ivis;
  
      if (!XdbeQueryExtension(dpy, &majorrev, &minorrev))
  	return 0;
  
      print_standard_extension_info(dpy, extname, majorrev, minorrev);
      svi = XdbeGetVisualInfo(dpy, (Drawable *)NULL, &numscreens);
      for (iscrn = 0; iscrn < numscreens; iscrn++)
      {
  	printf("  Double-buffered visuals on screen %d\n", iscrn);
  	for (ivis = 0; ivis < svi[iscrn].count; ivis++)
  	{
  	    printf("    visual id 0x%lx  depth %d  perflevel %d\n",
  		   svi[iscrn].visinfo[ivis].visual,
  		   svi[iscrn].visinfo[ivis].depth,
  		   svi[iscrn].visinfo[ivis].perflevel);
  	}
      }
      XdbeFreeVisualInfo(svi);
      return 1;
  }
  
  static int
  print_record_info(Display *dpy, char *extname)
  {
      int majorrev, minorrev;
  
      if (!XRecordQueryVersion(dpy, &majorrev, &minorrev))
  	return 0;
      print_standard_extension_info(dpy, extname, majorrev, minorrev);
      return 1;
  }
  
  #ifdef XINPUT
  static int
  print_xinput_info(Display *dpy, char *extname)
  {
    int           loop, num_extensions, num_devices;
    char          **extensions;
    XDeviceInfo   *devices;
    XExtensionVersion *ext;
  
    ext = XGetExtensionVersion(dpy, extname);
    
    if (!ext || (ext == (XExtensionVersion*) NoSuchExtension))
        return 0;
  
    print_standard_extension_info(dpy, extname, ext->major_version,
  				ext->minor_version);
    XFree(ext);
  
    extensions = XListExtensions(dpy, &num_extensions);
    for (loop = 0; loop < num_extensions &&
           (strcmp(extensions[loop], extname) != 0); loop++);
    XFreeExtensionList(extensions);
    if (loop != num_extensions) {
        printf("  Extended devices :\n");
        devices = XListInputDevices(dpy, &num_devices);
        for(loop=0; loop<num_devices; loop++) {
  	  printf("	\"%s\"	[", devices[loop].name ? devices[loop].name : "<noname>");
  	  switch(devices[loop].use) {
  	  case IsXPointer:
  	      printf("XPointer]\n");
  	      break;
  	  case IsXKeyboard:
  	      printf("XKeyboard]\n");
  	      break;
  	  case IsXExtensionDevice:
  	      printf("XExtensionDevice]\n");
  	      break;
  	  default:
  	      printf("invalid value]\n");
  	      break;
  	  }
          }
        XFreeDeviceList(devices);
        return 1;
      }
    else
        return 0;
  }
  #endif
  
  #ifdef XRENDER
  static int
  print_xrender_info(Display *dpy, char *extname)
  {
    int		    loop, num_extensions;
    char		    **extensions;
    XRenderPictFormat *pictform;
    int		    count;
    int		    major, minor;
    int		    i, j;
    XVisualInfo	    viproto;		/* fill in for getting info */
    XVisualInfo	    *vip;		/* retured info */
    int		    nvi;		/* number of elements returned */
    int		    ndepths = 0, *depths = NULL;
  #if RENDER_MAJOR > 0 || RENDER_MINOR >= 6
    XFilters	    *filters;
    int		    f;
  #endif
  
    if (!XRenderQueryVersion (dpy, &major, &minor))
      return 0;
    
    print_standard_extension_info(dpy, extname, major, minor);
  
    extensions = XListExtensions(dpy, &num_extensions);
    for (loop = 0; loop < num_extensions &&
           (strcmp(extensions[loop], extname) != 0); loop++);
    XFreeExtensionList(extensions);
    if (loop != num_extensions) {
      printf ("  Render formats :\n");
      for (count = 0; (pictform = XRenderFindFormat (dpy, 0, NULL, count)); count++)
      {
        printf  ("  pict format:\n");
        printf  ("\tformat id:    0x%lx\n", pictform->id);
        printf  ("\ttype:         %s\n",
  	     pictform->type == PictTypeIndexed ? "Indexed" : "Direct");
        printf  ("\tdepth:        %d\n", pictform->depth);
        if (pictform->type == PictTypeDirect) {
  	printf("\talpha:        %2d mask 0x%x\n", pictform->direct.alpha, pictform->direct.alphaMask);
  	printf("\tred:          %2d mask 0x%x\n", pictform->direct.red, pictform->direct.redMask);
  	printf("\tgreen:        %2d mask 0x%x\n", pictform->direct.green, pictform->direct.greenMask);
  	printf("\tblue:         %2d mask 0x%x\n", pictform->direct.blue, pictform->direct.blueMask);
        }
        else
  	printf("\tcolormap      0x%lx\n", pictform->colormap);
      }
      printf ("  Screen formats :\n");
      for (i = 0; i < ScreenCount (dpy); i++) {
        nvi = 0;
        viproto.screen = i;
        vip = XGetVisualInfo (dpy, VisualScreenMask, &viproto, &nvi);
        printf ("    Screen %d", i);
  #if RENDER_MAJOR > 0 || RENDER_MINOR >= 6
        switch (XRenderQuerySubpixelOrder (dpy, i)) {
        case SubPixelUnknown: printf (" (sub-pixel order Unknown)"); break;
        case SubPixelHorizontalRGB: printf (" (sub-pixel order Horizontal RGB)"); break;
        case SubPixelHorizontalBGR: printf (" (sub-pixel order Horizontal BGR)"); break;
        case SubPixelVerticalRGB: printf (" (sub-pixel order Vertical RGB)"); break;
        case SubPixelVerticalBGR: printf (" (sub-pixel order Vertical BGR)"); break;
        case SubPixelNone: printf (" (sub-pixel order None)"); break;
        }
        printf ("\n");
        filters = XRenderQueryFilters (dpy, RootWindow (dpy, i));
        if (filters)
        {
  	printf ("      filters: ");
  	for (f = 0; f < filters->nfilter; f++)
  	{
  	  printf ("%s", filters->filter[f]);
  	  if (f < filters->nalias && filters->alias[f] != FilterAliasNone)
  	    printf ("(%s)", filters->filter[filters->alias[f]]);
  	  if (f < filters->nfilter - 1)
  	    printf (", ");
  	}
  	XFree (filters);
        }
  #endif
        printf ("\n");
        for (j = 0; j < nvi; j++)
        {
  	printf  ("      visual format:\n");
  	printf  ("        visual id:      0x%lx\n", vip[j].visualid);
  	pictform = XRenderFindVisualFormat (dpy, vip[j].visual);
  	if (pictform)
  	  printf("        pict format id: 0x%lx\n", pictform->id);
  	else
  	  printf("        pict format id: None\n");
        }
        if (vip) XFree ((char *) vip);
        depths = XListDepths (dpy, i, &ndepths);
        if (!depths) ndepths = 0;
        for (j = 0; j < ndepths; j++)
        {
  	XRenderPictFormat templ;
  
  	templ.depth = depths[j];
  	printf  ("     depth formats:\n");
  	printf  ("       depth           %d\n", depths[j]);
  	for (count = 0; (pictform = XRenderFindFormat (dpy, PictFormatDepth, &templ, count)); count++)
  	  printf("       pict format id: 0x%lx\n", pictform->id);
        }
        if (depths) XFree (depths);
      }
      return 1;
    }
    else
      return 0;
  }
  #endif /* XRENDER */
  
  
  #ifdef PANORAMIX
  
  static int
  print_xinerama_info(Display *dpy, char *extname)
  {
    int              majorrev, minorrev;
  
    if (!XineramaQueryVersion (dpy, &majorrev, &minorrev))
      return 0;
    
    print_standard_extension_info(dpy, extname, majorrev, minorrev);
  
    if (!XineramaIsActive(dpy)) {
      printf("  Xinerama is inactive.\n");
    } else {
      int i, count = 0; 
      XineramaScreenInfo *xineramaScreens = XineramaQueryScreens(dpy, &count);
      
      for (i = 0; i < count; i++) {
        XineramaScreenInfo *xs = &xineramaScreens[i];
        printf("  head #%d: %dx%d @ %d,%d\n", xs->screen_number, 
               xs->width, xs->height, xs->x_org, xs->y_org);
      }
      
      XFree(xineramaScreens);
    }
    
    return 1;
  }
  
  #endif /* PANORAMIX */
  
  #ifdef DMX
  static const char *core(DMXInputAttributes *iinfo)
  {
      if (iinfo->isCore)         return "core";
      else if (iinfo->sendsCore) return "extension (sends core)";
      else                       return "extension";
  }
  
  static int print_dmx_info(Display *dpy, char *extname)
  {
      int                  event_base, error_base;
      int                  major_version, minor_version, patch_version;
      DMXScreenAttributes  sinfo;
      DMXInputAttributes   iinfo;
      int                  count;
      int                  i;
  
      if (!DMXQueryExtension(dpy, &event_base, &error_base)
          || !DMXQueryVersion(dpy, &major_version, &minor_version,
                              &patch_version)) return 0;
      print_standard_extension_info(dpy, extname, major_version, minor_version);
      printf("  Version stamp: %d\n", patch_version);
  
      if (!DMXGetScreenCount(dpy, &count)) return 1;
      printf("  Screen count: %d\n", count);
      for (i = 0; i < count; i++) {
          if (DMXGetScreenAttributes(dpy, i, &sinfo)) {
              printf("    %2d %s %ux%u+%d+%d %d @%dx%d\n",
                     i, sinfo.displayName,
                     sinfo.screenWindowWidth, sinfo.screenWindowHeight,
                     sinfo.screenWindowXoffset, sinfo.screenWindowYoffset,
                     sinfo.logicalScreen,
                     sinfo.rootWindowXorigin, sinfo.rootWindowYorigin);
          }
      }
  
      if (major_version != 1
          || minor_version < 1
          || !DMXGetInputCount(dpy, &count))
          return 1;
  
      printf("  Input count = %d\n", count);
      for (i = 0; i < count; i++) {
  #ifdef XINPUT
          Display *backend;
          char    *backendname = NULL;
  #endif
          if (DMXGetInputAttributes(dpy, i, &iinfo)) {
              switch (iinfo.inputType) {
              case DMXLocalInputType:
                  printf("    %2d local %s", i, core(&iinfo));
                  break;
              case DMXConsoleInputType:
                  printf("    %2d console %s %s", i, core(&iinfo),
                         iinfo.name);
                  break;
              case DMXBackendInputType:
  #ifdef XINPUT
                  if (iinfo.physicalId >= 0) {
                      if ((backend = XOpenDisplay(iinfo.name))) {
                          XExtensionVersion *ext
                              = XGetExtensionVersion(backend, INAME);
                          if (ext
                              && ext != (XExtensionVersion *)NoSuchExtension) {
                              
                              int         count, i;
                              XDeviceInfo *devInfo = XListInputDevices(backend,
                                                                       &count);
                              if (devInfo) {
                                  for (i = 0; i < count; i++) {
                                      if ((unsigned)iinfo.physicalId
                                          == devInfo[i].id
                                          && devInfo[i].name) {
                                          backendname = strdup(devInfo[i].name);
                                          break;
                                      }
                                  }
                                  XFreeDeviceList(devInfo);
                              }
                          }
                          XCloseDisplay(backend);
                      }
                  }
  #endif
                  printf("    %2d backend %s o%d/%s",i, core(&iinfo),
                         iinfo.physicalScreen, iinfo.name);
                  if (iinfo.physicalId >= 0) printf("/id%d", iinfo.physicalId);
  #ifdef XINPUT
                  if (backendname) {
                      printf("=%s", backendname);
                      free(backendname);
                  }
  #endif
                  break;
              }
          }
          printf("\n");
      }
      return 1;
  }
  
  #endif /* DMX */
  
  #ifdef INCLUDE_XPRINT_SUPPORT
  static
  void print_xprint_attrpool(const char *name, const char *attrpool)
  {
    int         c;
    const char *s = attrpool;
    
    printf("    %s:\n      ", name);
    
    while( (c = *s++) != '\0' )
    {
      if (c == '\n') {
        printf("\n      ");
      }
      else
      {
        fputc(c, stdout);
      }
    }
    fputc('\n', stdout);
  }
  
  static int
  print_xprint_info(Display *dpy, char *extname)
  {  
  
    short           majorrev,
                    minorrev;
    int             xp_event_base,
                    xp_error_base;
    XPPrinterList   printerlist;
    Screen        **pscreens;
    int             plcount,
                    pscrcount,
                    i;
  
    if (XpQueryVersion(dpy, &majorrev, &minorrev) == False) {
      return 0;
    }
    
    print_standard_extension_info(dpy, extname, majorrev, minorrev);
  
    if (XpQueryExtension(dpy, &xp_event_base, &xp_error_base) == False) {
      printf("  XpQueryExtension() failed.\n");
      return 0;
    }
    
    /* Print event info */
    printf("  xp_event_base=%d, xp_error_base=%d\n", xp_event_base, xp_error_base);
    
    /* Print info which screens support the Xprint extension */
    printf("  Print screens = {");
    pscreens = XpQueryScreens(dpy, &pscrcount);
    for( i = 0 ; i < pscrcount ; i++ ) {
      printf("%s%d", ((i > 0)?(", "):("")), (int)XScreenNumberOfScreen(pscreens[i]));
    }
    XFree(pscreens);
    printf("}\n");
  
    /* Enumerate the list of printers */
    printerlist = XpGetPrinterList(dpy, NULL, &plcount);
    /* Print number of printers, then each printer name and description */
    printf("  Found %d printers on this server.\n", plcount);
    for( i = 0 ; i < plcount ; i++) {
      printf("  printer %d: name='%s', descr='%s'\n",
             i, NULLSTR(printerlist[i].name), NULLSTR(printerlist[i].desc));
    }
    
    /* Enumerate the list of printers with details */
    for( i = 0 ; i < plcount ; i++) {
      char       *printername = printerlist[i].name;
      XPContext   pcontext;
      char       *s;
      
      printf("  Attributes of printer '%s':\n", NULLSTR(printername));
  
      pcontext = XpCreateContext(dpy, printername);
      if (pcontext == None) {
        printf("    Error: Could not open printer.\n");
        continue;
      }
  
      s=XpGetAttributes(dpy, pcontext, XPJobAttr);     print_xprint_attrpool("XPJobAttr",     s);  XFree(s);
      s=XpGetAttributes(dpy, pcontext, XPDocAttr);     print_xprint_attrpool("XPDocAttr",     s);  XFree(s);
      s=XpGetAttributes(dpy, pcontext, XPPageAttr);    print_xprint_attrpool("XPPageAttr",    s);  XFree(s);
      s=XpGetAttributes(dpy, pcontext, XPPrinterAttr); print_xprint_attrpool("XPPrinterAttr", s);  XFree(s);
      s=XpGetAttributes(dpy, pcontext, XPServerAttr);  print_xprint_attrpool("XPServerAttr",  s);  XFree(s);
  
      XpDestroyContext(dpy, pcontext);
    }
    
    XpFreePrinterList(printerlist);
  
    return 1;
  }
  #endif /* INCLUDE_XPRINT_SUPPORT */
  
  /* utilities to manage the list of recognized extensions */
  
  
  typedef int (*ExtensionPrintFunc)(
      Display *, char *
  );
  
  typedef struct {
      char *extname;
      ExtensionPrintFunc printfunc;
      Bool printit;
  } ExtensionPrintInfo;
  
  ExtensionPrintInfo known_extensions[] =
  {
  #ifdef MITSHM
      {"MIT-SHM",	print_mitshm_info, False},
  #endif /* MITSHM */
  #ifdef XKB
      {XkbName, print_xkb_info, False},
  #endif /* XKB */
  #ifdef MULTIBUFFER
      {MULTIBUFFER_PROTOCOL_NAME,	print_multibuf_info, False},
  #endif
      {"SHAPE", print_shape_info, False},
      {SYNC_NAME, print_sync_info, False},
  #ifdef XFreeXDGA
      {XF86DGANAME, print_dga_info, False},
  #endif /* XFreeXDGA */
  #ifdef XF86VIDMODE
      {XF86VIDMODENAME, print_XF86VidMode_info, False},
  #endif /* XF86VIDMODE */
  #ifdef XF86MISC
      {XF86MISCNAME, print_XF86Misc_info, False},
  #endif /* XF86MISC */
      {XTestExtensionName, print_xtest_info, False},
      {"DOUBLE-BUFFER", print_dbe_info, False},
      {"RECORD", print_record_info, False},
  #ifdef XINPUT
      {INAME, print_xinput_info, False},
  #endif
  #ifdef XRENDER
      {RENDER_NAME, print_xrender_info, False},
  #endif
  #ifdef PANORAMIX
      {"XINERAMA", print_xinerama_info, False},
  #endif
  #ifdef DMX
      {"DMX", print_dmx_info, False},
  #endif
  #ifdef INCLUDE_XPRINT_SUPPORT
      {XP_PRINTNAME, print_xprint_info, False},
  #endif /* INCLUDE_XPRINT_SUPPORT */
      /* add new extensions here */
  };
  
  int num_known_extensions = sizeof known_extensions / sizeof known_extensions[0];
  
  static void
  print_known_extensions(FILE *f)
  {
      int i, col;
      for (i = 0, col = 6; i < num_known_extensions; i++)
      {
  	int extlen = strlen(known_extensions[i].extname) + 1;
  	
  	if ((col + extlen) > 79)
  	{
  		col = 6;
  		fprintf(f, "\n     ");
  	}
  	fprintf(f, "%s ", known_extensions[i].extname);
  	col += extlen;
      }
  }
  
  static void
  mark_extension_for_printing(char *extname)
  {
      int i;
  
      if (strcmp(extname, "all") == 0)
      {
  	for (i = 0; i < num_known_extensions; i++)
  	    known_extensions[i].printit = True;
      }
      else
      {
  	for (i = 0; i < num_known_extensions; i++)
  	{
  	    if (strcmp(extname, known_extensions[i].extname) == 0)
  	    {
  		known_extensions[i].printit = True;
  		return;
  	    }
  	}
  	printf("%s extension not supported by %s\n", extname, ProgramName);
      }
  }
  
  static void
  print_marked_extensions(Display *dpy)
  {
      int i;
      for (i = 0; i < num_known_extensions; i++)
      {
  	if (known_extensions[i].printit)
  	{
  	    printf("\n");
  	    if (! (*known_extensions[i].printfunc)(dpy,
  					known_extensions[i].extname))
  	    {
  		printf("%s extension not supported by server\n",
  		       known_extensions[i].extname);
  	    }
  	}
      }
  }
  
  static void 
  usage(void)
  {
      fprintf (stderr, "usage:  %s [options]\n", ProgramName);
      fprintf (stderr, "-display displayname\tserver to query\n");
      fprintf (stderr, "-queryExtensions\tprint info returned by XQueryExtension\n");
      fprintf (stderr, "-ext all\t\tprint detailed info for all supported extensions\n");
      fprintf (stderr, "-ext extension-name\tprint detailed info for extension-name if one of:\n     ");
      print_known_extensions(stderr);
      fprintf (stderr, "\n");
      exit (1);
  }
  
  int 
  main(int argc, char *argv[])
  {
      Display *dpy;			/* X connection */
      char *displayname = NULL;		/* server to contact */
      int i;				/* temp variable:  iterator */
  
      ProgramName = argv[0];
  
      for (i = 1; i < argc; i++) {
  	char *arg = argv[i];
  	int len = strlen(arg);
  	
  	if (!strncmp("-display", arg, len)) {
  	    if (++i >= argc) usage ();
  	    displayname = argv[i];
  	} else if (!strncmp("-queryExtensions", arg, len)) {
  	    queryExtensions = True;
  	} else if (!strncmp("-ext", arg, len)) {
  	    if (++i >= argc) usage ();
  	    mark_extension_for_printing(argv[i]);
  	} else
  	    usage ();
      }
  
      dpy = XOpenDisplay (displayname);
      if (!dpy) {
  	fprintf (stderr, "%s:  unable to open display \"%s\".\n",
  		 ProgramName, XDisplayName (displayname));
  	exit (1);
      }
  
      print_display_info (dpy);
      for (i = 0; i < ScreenCount (dpy); i++) {
  	print_screen_info (dpy, i);
      }
  
      print_marked_extensions(dpy);
  
      XCloseDisplay (dpy);
      exit (0);
  }
  