DOKK / manpages / debian 10 / libtk-img-doc / img-ps.3tk.en
img-ps(3tk) Img img-ps(3tk) 







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








package require Tk 


package require img::ps ?1.4?


image create photo ?name?
  ?options?












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 specifically 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



  

  





  
[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.










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



  

  
This option is for reading from PostScript/PDF data containing more than
      one page. When specified 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.

  

  

  
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
      practically possible value. For postscript this means the zoom factors
      should be multiples of 1/72.










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.








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








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








Copyright (c) 1995-2009 Jan Nijtmans <nijtmans@users.sourceforge.net>








  

    1.4
    img-ps