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xwpick(1)		    General Commands Manual		     xwpick(1)

NAME
       xwpick -	pick images from an X11-screen and store in files

SYNOPSIS
       xwpick [-local] [-window	id] [-gray] [-reverse] [-pause]	[-format frmt]
       [<file>]

DESCRIPTION
       Xwpick lets you pick an image from an arbitrary window  or  rectangular
       area of an X11-server and write it to a file in a variety of formats.

       The  output  format  is defined whether by the -format option or	by the
       extension in the	file name. Possible formats/extentions are:

       ps      An Encapsulated PostScript file with a  compressed  image.  The
	       image is	centered, rotated and scaled to	fill the maximum space
	       on a page. It is	displayed in color  on	viewers	 and  printers
	       that  support  color  Postscript,  otherwise it is displayed as
	       grayscale. This format is convenient for	transparency  prepara-
	       tion.

       eps     Also  an	 Encapsulated PostScript file with a compressed	image,
	       but the image is	only centered, not rotated and scaled.	It  is
	       intended	for insertion into a document.

       epsi    The same	as eps,	but contains a black and white preview.

       gif     Graphics	 Interchange  Format  (GIF).  Use this format when you
	       want to keep files or transfer them to other computers.	It  is
	       also  convenient	 for  visualisations,  for example, with xv by
	       John Bradley.

       pcx     PCX format for IBM PC.

       pict    PICT format for Macintosh. It is	intended for image transfer on
	       Macintosh,  but	GIF format is also convenient for this purpose
	       (see Macintosh GIFConverter by Kevin A. Mitchell).

       ppm     PPM format from the PBM Plus library by Jef Poskanzer.  Use  it
	       and a routine from the PBM Plus library if you wish to have the
	       image in	a format not mentioned above.

       The main	feature	of xwpick is that it uses the Lempel-Ziv  Welch	 (LZW)
       compression  scheme  for	 image	encoding in Postscript,	thus producing
       very compact files (4-5 times less than files produced with  Run-Length
       encoding	 (RLE)	and  10-20 times less than files produced without com-
       pression)

HOW IT WORKS
       When xwpick is invoked, the user	sees a blinking	rectangle  surrounding
       the  contents  of  the  window  in which	the mouse pointer is currently
       placed. When the	mouse is moved to a different  window,	the  perimeter
       automatically  changes  to  the	size  of the new window.  If the mouse
       pointer is placed on the	Window Manager border of a  window,  then  the
       blinking	 rectangle  will  surround the window together with the	Window
       Manager border. To select the image inside the blinking rectangle it is
       sufficient to click the left mouse button.

       If  a user-defined perimeter is required, then hold down	the left mouse
       button to choose	the first corner of the	perimeter and  then  drag  the
       mouse to	define the opposite corner. The	blinking rectangle will	expand
       with the	movement of the	mouse.

       If it is	required to produce some changes inside	the selected area just
       before  outputing to a file, for	example, to change the palette or dis-
       play a pop-up menu, then	the -pause option can be used.

OPTIONS
       -local	     When -local is in the parameter list, xwpick picks	an im-
		     age  from the window under	the mouse pointer. This	option
		     is	intended to pick images	from pop-up menus,  which  are
		     on	 the  screen  only  when a mouse button	is pressed and
		     disappear immediately after the button is released.

       -window id    Pick an image from	the  window  with  integer  identifier
		     equal to id.  The identifier for a	window can be obtained
		     with the X	Window program xwininfo. To  pick  the	entire
		     screen (root window) the user may use the word root as an
		     identifier.

       -gray	     Transfer the image	to grayscale. This option can be  used
		     to	 optimize  output  on  level  1	 gray scale PostScript
		     printers.

       -reverse	     Transfer the image	to reverse  colors.  This  option  can
		     help  you	to save	the toner on your printer in case when
		     the image is too dark.

       -pause	     Do	not output the image till  the	<SPACE>	 bar  will  be
		     pressed.  This  option allows to use the mouse to produce
		     some changes inside the selected image just  before  out-
		     puting to a file.

       -format frmt  Set  output format. The format is defined by frmt string.
		     If	this option is omited, then the	output format  is  de-
		     fined  by	the  extension in the file name. Possible frmt
		     strings/extensions	are: ps, eps, epsi,  gif,  pcx,	 pict,
		     ppm.  In case when	-format	is in the parameter list and a
		     file name is omited the output is directed	to  the	 stan-
		     dard output.

EXAMPLES
       o       xwpick

       This  is	the simplest form of use. You will be prompted to input	a file
       name.

       o       xwpick image.ppm
	       ppmtoxpm	image  >image.xpm

       This is an example of how to get	an image in X11	pixmap format.	 First
       you  pick  the  image  from the screen into the file image.ppm and then
       convert it using	the ppmtoxpm routine from the PBM PLUS library.

       o       xwpick -local menu.epsi

       This is an example of how to pick the image of a	pop-up menu window and
       store it	in a file as encapsulated Postscript with preview.

       o       xwininfo
	       xwpick -w 0x8000c1 -g clock.ps

       This  is	an example of how to pick an image from	the window by the win-
       dow's identifier. First you find	the identifier using the xwininfo com-
       mand  and  then	pick  an image from the	window and store it in a Post-
       script file as a	grayscale image.

       o       xwpick -window root -format ps |	lpr

       This is an example of how to send an image of the root window  directly
       to the printer.

AUTHOR
       Evgeni Chernyaev		  chernaev@mx.ihep.su

SEE ALSO
       xwd(1), xv(1), xgrabsc(1), XtoPS(1), xwininfo(1), ppm(5)

COPYRIGHT
       Copyright (C) 1993, 1994	by Evgeni Chernyaev.

			       10 September 1994		     xwpick(1)

NAME | SYNOPSIS | DESCRIPTION | HOW IT WORKS | OPTIONS | EXAMPLES | AUTHOR | SEE ALSO | COPYRIGHT

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