[Bf-funboard] Read/write of 16bit PNG

[Carsten Wartmann]

Hi,

Ton told me that "16 bits png reading was not meant to work." in 
Blender. (see 
http://projects.blender.org/tracker/?func=detail&atid=125&aid=5839&group_id=9)

I wonder why. Is it not usefull? I mean we have now bigger depth images 
in Blender with DPX, EXR and whatever, so why ot PNG?

For my case it is of course usefull, and I think the displacement 
modifier is also for others but limited with 8bit resolution. Well maybe 
it works with all the other fileformats, but my tests were quite mixed, 
producing 64 to 120MB images for just a simple 16bit 4096x4096 greymap 
is not very usefull.

Maybe its also nice to see "Blender: All PNG Formats read and write" here:

http://www.libpng.org/pub/png/pngap3d.html

Its a standard http://tools.ietf.org/html/rfc2083 and when a application 
can make use of 16bit and can`t read 16bit/color because the code its 
not there *I* would call it bug. Prove me wrong by explain why it does 
not make sense, be kind I am only a stupid writer.

Best Regards,
Carsten