Re: [AD] Z-buffer API

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Bertrand Coconnier wrote:
> OK, it seems we both agree now :-)

Great! I attach a patch which does the following:
 - Support having user-visible z-buffers, so you can
have several of them around at the same time (this is
what my first patch did, so don't apply that one).
 - The type for z-buffers is ZBUFFER, although this is
currently implemented as `typedef BITMAP ZBUFFER'.
 - create_sub_zbuffer()
 - Update documentation. I also added z-buffered
polygon drawing to the feature list in readme.txt. I'm
not sure if that's appropriate, but at least it's an
attractive buzzword :-)

Sven

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