Image handling and transformation from Tcl (Tk not required). 
Part of the [eTcl] distribution for Win32, Linux and Windows Mobile (aka PocketPC). 
Will be soon available as stub-enabled extension for Win32 and Linux/x86.

http://www.evolane.com/software/pixane/index.html

[RS] 2006-02-03 - Example code: display an image file ([JPEG] or others, what [Tk] itself has not built-in) in the [eTcl] [console]:

#-- Convert a "pixane" image to a [Tk] [photo]
 proc piximg file {
   package req pixane
   set p [pixane create]
   pixane load $p -file $file
   K [pixcopy $p] [pixane delete $p]
 }

#-- Export procs to the console interpreter (see [corp] and [K] for details)
 console eval [corp piximg]
 console eval [corp K]

#-- The viewer now is similar to ''see'' described on [console] page:
 proc see2 file {
   set im [console eval [list piximg $file]]
   console eval [list .console image create end -image $im]
 }

[RS] has tested that pixane 0.3 as came with [eTcl] 1.0pl6, on [PocketPC], works well with the following formats: GIF, PNG (most), JPEG, BMP (uncompressed). So for my purposes, it is quite a good substitute for the [Img] package, which isn't yet available on PocketPC.

[EH] '''2006-03-09''' Pixane now registers Tk photo handlers when loaded and Tk is already loaded. It means images in all supported formats (BMP, JPEG, PNG, ...) can be loaded the usual way into Tk photos, that is 'image create photo -file|-data'. Then, pixcopy API is useful only of one want to draw into a pixane image, before displaying it as a Tk photo.
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[Category Package] - [Category Image Processing]