GitHub - mattui/PNG-Alpha-Premultiplier: Convert non-premultiplied alpha png file to its premultiplied equivalent.

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Convert non-premultiplied alpha png file to its premultiplied equivalent.

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Name		Name	Last commit message	Last commit date
Latest commit History 3 Commits
Makefile		Makefile
NPMApng2PMApng.c		NPMApng2PMApng.c
NPMApng2PMApng.py		NPMApng2PMApng.py
README		README
RGBA2AAAA.c		RGBA2AAAA.c
configure.mk		configure.mk

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What ?
======
This tool permits to convert non-premultiplied alpha png file to its
premultiplied equivalent.

Note: The python version is 100 times slower than the C version.

Requirements
============
 - Python version requires numpy and PIL
 - C version requires libpng

How to run the Python version
=============================
$ python NPMApng2PMApng.py in.png out.png


How to compile and run the C version
====================================
edit the configure.mk file to make CONF_INCS and CONF_LIBS links to
your libpng installation directory.

$ make
$ ./NPMApng2PMApng in.png out.png