[Tile-dev] ANN: TkPNG 0.5 (initial announcement)

[Michael K. <mi...@mu...>]

Well I'm feeling too impatient for the clt announcement to show up so I 
can copy and paste and too lazy to write a full announcement again, but... 
Aqua and Tile users especially will probably be interested in TkPNG - an 
extension that adds PNG photo image support to Tcl/Tk, with full range of 
bit depths and color types (including alpha support).  This is not based 
on libpng, but is a lightweight decoder implementation written 
specifically for Tk.  The only dependency, other than Tcl/Tk its self, is 
on zlib.

http://mini.net/tcl/13760

However, be aware that there's a Tk Aqua bug that will cause it to crash 
if you use images with alpha channels in bevel buttons (labels and 
non-bevel buttons should be okay).  It's not TkPNG's fault - it's the same 
with Img.  Tile doesn't crash if you use alpha images in its buttons, but 
due to a -different- Tk Aqua bug images (with or without alpha) turn to 
white rectangles in disabled widgets.  Both of those are open bugs in the 
Tk tracker, but I just thought I should mention it in case someone tried 
an image with alpha in a bevel button for the first time and thought the 
crash was my fault. ;)

--
Michael Kirkham
www.muonics.com