Scroll to navigation

img-sgi(3tk) Img img-sgi(3tk) 





NAME


img-sgi - Silicon Graphics format (sgi)






SYNOPSIS


package require img::sgi ?2.0?










DESCRIPTION


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 Silicon Graphics format
    (sgi). More specifically img::sgi extends Tk's photo
    [https://www.tcl.tk/man/tcl9.0/TkCmd/photo.html] image type.


The name of the new format handler is sgi. This handler
    provides new additional configuration options. See section 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 of option -format is treated as a
    list and may contain any of the special options listed in section
    Options.


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.






SUPPORTED TYPES


This format handler supports the following image types:


    
  
  • 24-bit pixels: Truecolor (RGB, 8-bit channels).
    • 
  
  • 32-bit pixels: Truecolor with alpha channel (RGBA, 8-bit channels).
    • 
  
  • 48-bit pixels: Truecolor (RGB, 16-bit channels).
    • 
  
  • 64-bit pixels: Truecolor with alpha channel (RGBA, 16-bit channels).
    • 



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






 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    |









OPTIONS


The handler provides the following options:



  

  
This option is supported for reading and writing. Available since version
      1.3.
    
If set to true, additional information about the read
        or written image is printed to stdout. Default is false.

  

  

  
This option is supported for reading and writing. Available since version
      1.3.
    
If set to false, an alpha channel is ignored during
        reading or writing. Default is true.

    
Note: This option was named -matte in previous
        versions and is still recognized.

  

  

  
This option is supported for writing only. Available since version 1.3.
    
Set the compression mode to either none or rle.
        Default is rle.

  








SEE ALSO


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






COPYRIGHT


Copyright (c) 1995-2024 Jan Nijtmans <nijtmans@users.sourceforge.net>
Copyright (c) 2002-2024 Andreas Kupries <andreas_kupries@users.sourceforge.net>
Copyright (c) 2003-2024 Paul Obermeier <obermeier@users.sourceforge.net>








  

    2.0
    img-sgi