NAME

img-sun - Img, Sun Raster Format (sun)

SYNOPSIS

package require Tk

package require img::sun ?1.4?

image create photo ?name? ?options?

DESCRIPTION

package require img::sun.

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 Sun Raster Format (sun). More specifically img::sun extends Tk's photo image type.

The name of the new format handler is sun.

The package img::sun 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::sun.

This handler provides new additional configuration options. See section SUN OPTIONS for more detailed explanations.

All of the above means that in a call like

image create photo ?name? ?options?

[1]: Image data in sun format (options -data and -file) is detected automatically.
[2]: The format name sun 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 SUN OPTIONS.

SUPPORTED SUN TYPES



  1-bit pixels: Black and White.


  8-bit pixels: Grayscale or indexed.


 24-bit pixels: True-color (RGB, each channel 8 bit).


 32-bit pixels: True-color with alpha channel (RGBA, each channel 8 bit).


 List of currently supported features:


 Type   |     Read      |     Write     |


        | -file | -data | -file | -data |


 ----------------------------------------


  1-bit | Yes   | Yes   | No    | No    |


  8-bit | Yes   | Yes   | No    | No    |


 24-bit | Yes   | Yes   | Yes   | Yes   |


 32-bit | Yes   | Yes   | Yes   | Yes   |


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

SUN 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 string: 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.

KEYWORDS

image handling, sun, tk

COPYRIGHT

Copyright (c) 1995-2023 Jan Nijtmans <nijtmans@users.sourceforge.net>