Marek Lands Radeon Gallium3D MSAA Changes
Written by Michael Larabel in Mesa on 15 August 2012 at 02:30 PM EDT. 29 Comments
Marek Olšák, the prolific independent contributor to Mesa/Gallium3D and the open-source Radeon Linux graphics driver, has landed a number of commits today in Mesa pertaining to MSAA, a.k.a. multi-sample anti-aliasing for newer Radeon GPUs.

The landed work today includes the enabling of MSAA support for Radeon HD 5000 series GPUs -- the "Evergreen" generation of ATI/AMD graphics processors. The Evergreen MSAA support requires a recent Radeon DRM driver and will only work for this generation of graphics processors and supports 2x, 4x, and 8x MSAA modes.

The commits pushed by Marek today include:

- gallium/u_blitter: document custom meta helpers
- r600g: disable handling of DISCARD_RANGE
- r600g: implement timestamp query and get_timestamp hook
- r600g: enable MSAA on evergreen by default
- r600g: implement copying between MSAA textures
- r600g: implement MSAA color resolve
- r600g: implement MSAA depth-stencil decompression and resolve
- r600g: implement TXQ_LZ opcode
- r600g: implement MSAA rendering and texturing for evergreen and cayman
- r600g: implement set_sample_mask
- r600g: implement alpha-to-coverage
- r600g: implement alpha-to-one
- r600g: remove support for 3-channel colorbuffers
- configure.ac: bump libdrm_radeon requirement to 2.6.38
- winsys/radeon: print error if CS is overflowed
- gallium/u_blitter: implement X and Y texture flipping
- gallium/u_blitter: implement blitting multisample resources
- gallium: add TGSI support for multisample textures
- gallium/tgsi: fix TGSI text parser
- gallium/u_blit: set dst format from pipe_resource, not pipe_surface
- gallium: make pipe_box signed in order to represent flipped blits
- st/mesa: don't clamp fragment color with integer colorbuffer
- mesa: flush vertices in test_framebuffer_completeness

This work will be part of what's expected to be the Mesa 9.0 release in about one month's time.
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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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