Thank you all for your kind answers Here is the corresponding bug report : https://bugzilla.mozilla.org/show_bug.cgi?id=774134
The patent issue has been briefly discussed there... Thibaut 2012/8/29 Tapani Pälli <tapani.pa...@intel.com>: > Hello; > > On 08/29/2012 12:30 AM, Kenneth Graunke wrote: >> On 08/28/2012 10:56 AM, thibaut bethune wrote: >>> Hi, >>> >>> About the "the potential legal problem" regarding S3TC implementation >>> pointed, for instance, by Ian Romanick in Bug 24207 [1] , has anyone >>> noticed that Firefox 15 will support the WEBGL_compressed_texture_s3tc >>> extension [2] ? >>> >>> Does anyone know what is Mozilla's position regarding this situation ? >>> >>> Thanks ! >>> >>> Thibaut, 35', France >>> >>> [1 ] https://bugs.freedesktop.org/show_bug.cgi?id=24207 >>> [2] https://developer.mozilla.org/en-US/docs/Firefox_15_for_developers >> >> As far as I know, WEBGL_compressed_texture_s3tc simply exposes the S3TC >> functionality already present in the underlying OpenGL drivers to web >> apps. I don't think they can reasonably support it unless the GL >> drivers support S3TC. > > Also the spec draft does not mention compression but only 'format > support' (decompression), for me it seems like > 'WEBGL_compressed_texture_s3tc' is a composition of > EXT_texture_compression_dxt1 and ANGLE_texture_compression_dxt. This > might not help with the patent problem though (like dxt1 spec states). > > http://www.khronos.org/registry/webgl/extensions/WEBGL_compressed_texture_s3tc/ > > >> The hardware and GL drivers, which actually implement the S3TC support, >> need an appropriate patent license. Mozilla should not need a patent >> license: it's simply an application using S3TC (and there are tons of >> those), not implementing the texture compression algorithms. >> >> So this does not really affect the patent situation in any way. >> >> Disclaimer: I am not a lawyer and cannot give legal advice. This is >> purely my understanding. > > -"- > >> _______________________________________________ >> mesa-dev mailing list >> mesa-dev@lists.freedesktop.org >> http://lists.freedesktop.org/mailman/listinfo/mesa-dev >> > > > -- > > // Tapani > > _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
