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img-ps(n)                                                                                          img-ps(n)



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NAME
       img-ps - Img, Adobe PostScript Format (ps)

SYNOPSIS
       package require Tk

       package require img::ps  ?1.3?

       image create photo ?name? ?options?

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DESCRIPTION
       The  package img::ps is a sub-package of Img. It can be loaded as a part of the complete Img support,
       via package require Img, or on its own, via package require img::ps.

       Like all packages of Img it does not provide new commands, but extends the existing Tk command  image
       so that it supports files containing raster images in the Adobe PostScript Format (ps). More specifi-cally specifically
       cally img::ps extends Tk's photo image type.

       The name of the new format handler  is  ps.   This  handler  provides  new  additional  configuration
       options. See section PostScript OPTIONS for more detailed explanations.

       Note  that  this  package  provides a pdf handler too, i.e. a handler for the Adobe Portable Document
       Format. That handler accepts the same options as the ps handler.

       The package delegates the actual conversion of data in PostScript and PDF format into a raster  image
       to  the  ghostscript  application.  It therefore depends upon the presence of said application and is
       non-functional is ghostscript is not present.

       All of the above means that in a call like

       image create photo ?name? ?options?


       [1]    Image data in ps and PDF format (options -data and -file) is detected automatically.

       [2]    The format names ps and pdf are recognized by the option -format.  In addition the  value  for
              the  option  is  treated  as list and may contain any of the special options listed in section
              PostScript OPTIONS.


POSTSCRIPT OPTIONS
       The handler provides two options, both influencing the reading of PostScript or PDF images. The  han-dler handler
       dler is not able to write images in PostScript or PDF.

       -index n
              This option is for reading from PostScript/PDF data containing more than one page. When speci-fied specified
              fied it will read the n'th page in the data. The first page is at index 0 and will be read  by
              default, i.e. when the option is not specified.

              Note: This option is not yet implemented.

       -zoom X Y
              Multiply image size by the given scale factors. If Y is missing, the default is the same as X.
              X and Y are allowed to be in floating point format, but they are rounded to the nearest  prac-tically practically
              tically  possible  value.  For  postscript  this means the zoom factors should be multiples of
              1/72.


REQUIREMENTS
       The code provided by Img does not perform the interpretation and rasterizing of the input  by  itself
       but  delegates  this to the gs application. This is the GhostScript implementation of PostScript (and
       PDF).

       If gs is not installed this format handler cannot be used.

SEE ALSO
       img-bmp, img-gif, img-ico, img-intro, img-jpeg, img-pcx, img-pixmap, img-png, img-ppm,  img-ps,  img-sgi, imgsgi,
       sgi, img-sun, img-tga, img-tiff, img-window, img-xbm, img-xpm

KEYWORDS
       ghostscript, gs, image handling, pdf, postscript, ps, tk

COPYRIGHT
       Copyright (c) 1995-2003 Jan Nijtmans <nijtmans@users.sourceforge.net>




Img                                                  1.3                                           img-ps(n)