[ft] FreeType License and patents

[Werner LEMBERG]

Folks,


I've recently stumbled across the following paragraph from the Apache
license 2.0 (http://www.apache.org/licenses/LICENSE-2.0.html):

  3. Grant of Patent License.

  Subject to the terms and conditions of this License, each
  Contributor hereby grants to You a perpetual, worldwide,
  non-exclusive, no-charge, royalty-free, irrevocable (except as
  stated in this section) patent license to make, have made, use,
  offer to sell, sell, import, and otherwise transfer the Work, where
  such license applies only to those patent claims licensable by such
  Contributor that are necessarily infringed by their Contribution(s)
  alone or by combination of their Contribution(s) with the Work to
  which such Contribution(s) was submitted.  If You institute patent
  litigation against any entity (including a cross-claim or
  counterclaim in a lawsuit) alleging that the Work or a Contribution
  incorporated within the Work constitutes direct or contributory
  patent infringement, then any patent licenses granted to You under
  this License for that Work shall terminate as of the date such
  litigation is filed.

Looking up the FreeType License I've found out that we don't have such
a clause...

I would like to add something similar, with the exception that code
especially marked as patented within the FreeType source code is not
covered.

Comments?


    Werner