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Intel Adds BPTC Texture Compression To Their Mesa Driver

Intel

Published on 22 July 2014 04:10 PM EDT
Written by Michael Larabel in Intel
16 Comments

Intel has introduced BPTC texture compression support to Mesa and specifically their Intel HD Graphics driver along with the Mesa software rasterizer.

As explained at OpenGL.org, "BPTC Texture Compression is the collective name for a pair of compression formats. One of them is for unsigned normalized images, while the other is for floating-point values. They both use 4x4 blocks, and each block in both is 128-bits in size. Unlike S3 Texture Compression, the blocks are taken as byte streams, and thus they are endian-independent." Additional information can be found via the specification for the GL_ARB_texture_compression_bptc extension.

Intel "Gen7" Ivy Bridge hardware and newer has support for dealing with BPTC. Neil Roberts of Intel's Open-Source Technology Center published the set of six patches for providing the BPTC texture compression support in Mesa. The patches have yet to be merged to Mesa trunk but for now can be found on Mesa-dev and will hopefully land in time for the next (Mesa 10.3) release. Besides this texture compression scheme working with the latest Intel graphics hardware, GL_ARB_texture_compression_bptc is unconditionally supported by Mesa's "swrast" driver.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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