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Looking for some kind of simple tool or process for Windows that will let me convert one or more standard PNGs to premultiplied alpha.
Command line tools are ideal; I have easy access to PIL (Python Imaging Library) and Imagemagick, but will install another tool if it makes life easier.
Thanks!
I just released a bit of code in Python and in C that does what you are looking for. It’s on github: http://github.com/maxme/PNG-Alpha-Premultiplier
The Python version is based on the cssndrx response. C version is based on libpng.