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

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NAME

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


SYNOPSIS

       package require Tk

       package require img::ps  ?1.4?

       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 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

       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 handler 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 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.

       -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
              practically 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, img-sun, img-tga, img-tiff, img-
       window, img-xbm, img-xpm


KEYWORDS

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


COPYRIGHT

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

img-ps                                1.4                            img-ps(n)

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