img-sgi(n) img-sgi(n) ______________________________________________________________________________
NAME
img-sgi - Img, SGI Native Format (sgi)
SYNOPSIS
package require Tk
package require img::sgi ?1.4?
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 configuration 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 read-
ing or writing. Default is true.
SEE ALSO
img-bmp(n), img-dted(n), img-gif(n), img-ico(n), img-intro(n),
img-jpeg(n), img-pcx(n), img-pixmap(n), img-png(n), img-ppm(n),
img-ps(n), img-raw(n), img-sgi(n), img-sun(n), img-tga(n), img-tiff(n),
img-window(n), img-xbm(n), img-xpm(n)
KEYWORDS
image handling, sgi, tk
COPYRIGHT
Copyright (c) 1995-2009 Jan Nijtmans <nijtmans@users.sourceforge.net>
Img 1.4 img-sgi(n)
Mac OS X 10.8 - Generated Fri Sep 7 19:13:17 CDT 2012