Re: Apple's SVG patent

Chris Lilley wrote:
>Go read the patent, please. They have patented using a pair of color
>images as alpha channels. This might or might not have prior art (it
>might well, and I would encourage people to report it) but it is not the
>same as 'patenting bitbasks'

OK, look at pnmcomp.c, dated 1992, in the NetPBM tools.  It does precisely
what Apple's abstract says, using a separate file for the alphamap.

Glenn

Received on Thursday, 4 October 2001 08:38:02 UTC