img-sgi(n) img-sgi(n)

NAME
       img-sgi - Img, SGI Native Format (sgi)

SYNOPSIS
       package require TTkk

       package require iimmgg::::ssggii  ??11..33??

       iimmaaggee ccrreeaattee pphhoottoo ?name? ?options?


DESCRIPTION
       The  package  iimmgg::::ssggii  is  a sub-package of IImmgg. It can be loaded as a
       part of the complete Img support, via ppaacckkaaggee rreeqquuiirree IImmgg,  or  on  its
       own, via ppaacckkaaggee rreeqquuiirree iimmgg::::ssggii.

       Like  all packages of IImmgg it does not provide new commands, but extends
       the existing TTkk command iimmaaggee so  that  it  supports  files  containing
       raster  images  in  the  SGI  Native  Format  (sgi).  More specifically
       iimmgg::::ssggii extends TTkk's pphhoottoo image type.

       The name of the new format handler is ssggii.  This handler  provides  new
       additional  configuration  options.  See  section  SSGGII OOPPTTIIOONNSS for more
       detailed explanations.

       All of the above means that in a call like

       iimmaaggee ccrreeaattee pphhoottoo ?name? ?options?

       [1]    Image data in sgi format (options -ddaattaa and -ffiillee)  is  detected
              automatically.

       [2]    The  format  name  ssggii  is recognized by the option -ffoorrmmaatt.  In
              addition the value for the option is treated  as  list  and  may
              contain  any  of  the  special  options  listed  in  section SSGGII
              OOPPTTIIOONNSS.

SSUUPPPPOORRTTEEDD SSGGII TTYYPPEESS
        24-bit pixels: True-color (RGB, each channel 8 bit).
        32-bit pixels: True-color with alpha channel (RGBA, each channel 8 bit).
        48-bit pixels: True-color (RGB, each channel 16 bit).
        64-bit pixels: True-color with alpha channel (RGBA, each channel 16 bit).

        List of currently supported features:

        Type   |     Read      |     Write     |
               | -file | -data | -file | -data |
        --------------------
        24-bit | Yes   | Yes*  | Yes   | Yes*  |
        32-bit | Yes   | Yes*  | Yes   | Yes*  |
        48-bit | Yes   | Yes*  | No    | No    |
        64-bit | Yes   | Yes*  | No    | No    |

        *: Implemented by reading/writing from/to a temporary file. This will
           be slow for larger images.

        All images types may be either uncompressed or run-length encoded.

SSGGII OOPPTTIIOONNSS
       The handler provides the following options:

       -vveerrbboossee bool
              This option is supported for reading and writing.

              If set to ttrruuee, additional information about  the  loaded/stored
              image is printed to stdout. Default is ffaallssee.

       -ccoommpprreessssiioonn type
              This option is supported for writing only.

              Set the compression mode to either nnoonnee or rrllee.  Default is rrllee.

       -mmaattttee bool
              This option is supported for reading and writing.

              If set to ffaallssee, a matte (alpha) channel is ignored during read-
              ing or writing. Default is ttrruuee.

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-win-
       dow, img-xbm, img-xpm

KKEEYYWWOORRDDSS
       image handling, sgi, tk

COPYRIGHT
       Copyright (c) 1995-2003 Jan Nijtmans 



Img                                   1.3                           img-sgi(n)