Mesa Now Supports S3TC Texture Compression With sRGB Color Components
Written by Michael Larabel in Mesa on 2 February 2019 at 06:41 AM EST. Add A Comment
MESA --
Since the notorious S3TC patent expired at the end of 2017, this common texture compression implementation for OpenGL has been supported by mainline Mesa. It's now been extended to also support sRGB non-linear color components.

Google/Chromium developer Gurchetan Singh added support for OpenGL EXT_texture_compression_s3tc_srgb support to Mesa: both core Mesa as well as the drivers -- Gallium3D and the i965 classic driver.

Google and Unity developers worked out the EXT_texture_compression_s3tc_srgb back in 2016 for using S3 Texture Compression with sRGB color components. Adding this extension to Mesa ended up being quite trivial at a few lines of code.

This S3TC sRGB support comes just days after Intel landed for sRGB / FP16 support, including the EXT_sRGB_write_control extension. This latest Mesa work will be found in the 19.1 release due out next quarter with the 19.0 branching having occurred last week.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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