On 03/27/2009 03:34 PM, Jud Craft wrote:
Sir, the subject is not false. You may be a text-stack-maintainer,
but I am not a moron.
Then please point it out to me where the "supposedly patent-free" claim come from.
[...]
They obviously have developed their own filter code (see above),
sometime before Freetype removed their own built-in LCD-specific
filtering. The final result is apparently comparable to Freetype's
old (patent-infringing) filters.
Sure, Qt developed their own. Xft and cairo also developed their own (written
by Keith Packard). Then FreeType developed four, one of which similar to the
one in Qt, Xft, and cairo (developed by David Turner).
Your reasoning seems to be:
- The filter in Xft and cairo is patent-infringing
- The Qt filter was developed separately
= Result: The Qt filter is supposedly patent-free
That's baseless. That's deducing ~p=>~q when we know p=>q.
Anyway, to make it clear, the reason the filter in Xft and cairo is
patent-infringing is not because someone copied it from ClearType. No. It's
infringing because the whole idea of subpixel filtered text rendering is
patented. You can implement and reimplement and reimplement. Doesn't make a
difference (until the patents expire).
I'm sure you didn't mean to waste anyone's time. It just looked more like
what one typically finds on news sites: an eye-grabbing title with no support.
Thanks for clarifying.
behdad
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