Convert RGBA to BGRA using standard library?

Greg Ewing <greg.ewing-F+z8Qja7x9Xokq/[email protected]>
Newsgroups gmane.comp.python.pygui,gmane.comp.python.pyobjc.devel,gmane.comp.gnome.gtk+.python,gmane.comp.python.windows
Message-ID <[email protected]> 
Can anyone think of an efficient way to convert a string
full of RGBA image data to BGRA, using only what's available
in the standard library?

I'm trying to add a function to PyGUI for creating an Image
object from arbitrary data. The problem I'm having is that
GDI+ on Windows expects BGRA, whereas most other platforms
deal with RGBA. I don't want to require the user to supply
the data in different formats on different platforms, so
PyGUI needs to be able to convert where necessary.

I know the conversion can be done easily using something
like PIL or numpy, but I'm after a solution that doesn't
depend on any third-party libraries.

-- 
Greg
lmpx.com only provides a reader for public news (NNTP) servers. It is not affiliated with the servers or forums shown here and is not responsible for the content of articles, which is written by their respective authors.