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SuSE 11.3 - man page for img-sgi (suse section n)

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

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

SYNOPSIS
       package require Tk

       package require img::sgi  ?1.3?

       image create photo ?name? ?options?

DESCRIPTION
       The  package  img::sgi 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::sgi.

       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 SGI Native Format
       (sgi). More specifically img::sgi extends Tk's photo image type.

       The name of the new format handler is sgi.  This handler provides new additional  configu-
       ration options. See section SGI OPTIONS for more detailed explanations.

       All of the above means that in a call like

       image create photo ?name? ?options?

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

       [2]    The format name sgi is 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 SGI OPTIONS.

SUPPORTED SGI TYPES
	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.

SGI OPTIONS
       The handler provides the following options:

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

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

       -compression type
	      This option is supported for writing only.

	      Set the compression mode to either none or rle.  Default is rle.

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

	      If set to false, a matte (alpha) channel is  ignored  during  reading  or  writing.
	      Default is true.

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
       image handling, sgi, tk

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

Img					       1.3				       img-sgi(n)


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