evanw / evanw/theta

Patent issues

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Description

Checking the sign of `u^2 - v` on the GPU appears to be [patented](https://www.google.com/patents/US8068106) by Adobe in the US.
There also are about [21 patents](https://www.google.com/patents/US20110285711) by Nvidia (click on the "20 More" link) that might or might not apply.

EDIT: This seems to be working around some of the patents:
http://wdobbie.com/post/gpu-text-rendering-with-vector-textures/

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