The VESA CVT standard is still free, by the way. You can find download instructions for accessing any VESA public standard here:
http://www.vesa.org/wp-content/uploads/2010/12/thankspublic.htm On Mon, Apr 28, 2014 at 5:08 AM, Egbert Eich <[email protected]> wrote: > On Sun, Apr 27, 2014 at 12:28:46PM +0200, Mateusz Jończyk wrote: > > > > > > The xls however, felt as if it was meant as a reference > implementation, aimed at > > > improving the proliferation of CVT. If graham does get contacted, i > think he > > > would agree. > > I don't have any doubts that the Authors of the XLS would agree to > inclusion of its > > derivative works in XOrg and other programs. > > Until that happens, however, we cannot rely on it. > > > > > > Now, before we do get access to those documents, how are you intending > to > > > circumvent this claimed copyright infringement without infringing > yourself under > > > your very strict rules? > > We could just rewrite it using the Chinese wall principle: > > http://en.wikipedia.org/wiki/Clean_room_design > > Gentlemen - please get out of this rat hole! > > The implemenation in the X.Org repo - from which other implemenations > were derived - is not a copy of the code in the spread sheet and > therefore does not infringe on any copyright held by the author of it: > the spread sheet is in XLS, the X.Org implemenation is C code: > The *only* thing in common with the spread sheet is the *algorithm*. > > This algorithm however is a published and publically available VESA > standard. > > One can obtain VESA standards either > - by downloading them if they are available for free download (some are) > - by purchasing them > - by being a member of VESA. > > The beauty of VESA standards is that they are royalty free: Once one > has obtained one one can freely implement it. > In our case here, the algorithm if the CVT standard was published by > VESA and made available for free download thru the said spread sheet > (instead of a pdf document). > > So why on earth would anybody now want to do a clean room implemenation > of a standard that is publically available? > > The *only* thing that should be done is to get rid of the paragraph > containing the eye-brow raiser term 'stolen' to something saying: > > This code is an implemenation of the VESA CVT standard. > This standard can be obtained from http://www.vesa.org. > > Cheers, > Egbert. > > _______________________________________________ > [email protected]: X.Org development > Archives: http://lists.x.org/archives/xorg-devel > Info: http://lists.x.org/mailman/listinfo/xorg-devel > -- Jasper
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