S3TC Support Will Land In Mesa Now That The Patent Has Expired

Written by Michael Larabel in Mesa on 2 October 2017 at 07:08 AM EDT. 26 Comments
As mentioned last week, the S3TC patent has now expired. With the S3 Texture Compression no longer encumbered by a patent, support for it is being added to mainline Mesa.

Matt Turner of Intel has sent out a patch this morning, on the S3TC patent expiry date, to add support to mainline Mesa. The code used is what previously lived in its own standalone libtxc_dxtn library.

With the patches, EXT_texture_compress_s3tc and ANGLE_texture_compression_dxt are enabled by default in all supported configurations.

The patches for now can be found on Mesa-dev and will hopefully be merged to mainline in the days ahead for Mesa 17.3.
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