将PNG转换为预乘alpha的方法 [英] Method for converting PNGs to premultiplied alpha

问题描述

寻找 Windows 的某种简单工具或流程，让我将一个或多个标准PNG转换为预乘alpha。

Looking for some kind of simple tool or process for Windows that will let me convert one or more standard PNGs to premultiplied alpha.

命令行工具是理想的;我可以轻松访问PIL（Python成像库）和Imagemagick，但如果它让生活更轻松，我会安装另一个工具。

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.

谢谢！

推荐答案

我刚刚在Python和C中发布了一些代码，可以满足您的需求。它位于github上： http://github.com/maxme/PNG-Alpha-Premultiplier

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

Python版本基于cssndrx响应。 C版基于libpng。

The Python version is based on the cssndrx response. C version is based on libpng.

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