1 XWPICK
    Allows to pick an image from an arbitrary window or rectangular area
    of a X Window (DEC Window) server and write it to a file in a variety
    of formats.

    Synopsis

      XWPICK [file-spec]

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

       .PS, .EPS, .EPSI, .GIF, .PCX, .PICT, .PPM

    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 display
    a pop-up menu, then use the /PAUSE option.
2 /LOCAL
    Pick an image 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.
2 /WINDOW=id
    Pick an image from the window with integer identifier equival 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.
2 /GRAY
    Transfer the image to grayscale. This option can be used to optimize
    output on level 1 gray scale PostScript printers.
2 /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.
2 /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 outputing to a file.
2 /FORMAT=(PS,EPS,EPSI,GIF,PCX,PICT,PPM)
    Set output format. If this option is omited then the output format 
    is defined by the extension in the file name.

    Possible formats/extensions 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 greyscale. This format is convenient for
          transparency preparation.

    EPS   An Encapsulated PostScript file with a compressed image.
          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 visualizations, 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.
2 Examples
    1.  $ XWPICK

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


    2.  $ XWPICK/LOCAL MENU.EPS

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


    3.  $ XWPICK/WINDOW=0x8000C1/GRAY CLOCK.PS

    This is an example of how to pick an image from the window with
    hexadecimal identifier 0x8000C1 and store it in a Postscript file
    as a grayscale image.


    4.  $ XWPICK/PAUSE/FORMAT=EPSI PICT.PS

    This is an example of how to use the /PAUSE option, which allows to
    change, if required, the selected image just before outputing to a
    file. The image will be stored in a file PICT.PS as encapsulated
    Postscript with preview. 
2 Author

    Evgeni Chernyaev (chernaev@mx.ihep.su)

    Copyright (C) 1993, 1994 by Evgeni Chernyaev

    Permission to use, copy, modify, and distribute this software and
    its documentation for non-commercial purpose is hereby granted
    without fee, provided that the above copyright notice appear in all
    copies and that both the copyright notice and this permission notice
    appear in supporting documentation.

    This software is provided "as is" without express or implied warranty.
