Invisible wrote:
> libpng only needs the current and previous row to run the pixel filter.
> I have no idea what the DEFLATE compressor needs. (Other than a complete
> redesign...) All assuming you're not going to generate interlaced PNG,
> that is.

Well, with antialiasing off, it should be possible (in theory) to produce an
interlaced PNG with O(1) memory too. You'd have to modify POV-Ray to
compute the pixels in the same order they're stored in the PNG file.

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