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Thread: What Would You Like To See Out Of Mesa 8.1?

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  1. #1
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    Default What Would You Like To See Out Of Mesa 8.1?

    Phoronix: What Would You Like To See Out Of Mesa 8.1?

    With nearly one month having passed since the release of the highly-anticipated Mesa 8.0, where have you come to realize not full satisfaction with this open-source graphics driver library? What would you like to see improved with the next release, Mesa 8.1?..

    http://www.phoronix.com/vr.php?view=MTA2MzA

  2. #2
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    r300g:
    • Hyper-Z Enabled by default
    • MSAA

  3. #3
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    r600g - better power management (runs ~10 degrees hotter than Windows while idling) plus fan speed control.

  4. #4
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    Quote Originally Posted by Michael
    Greater OpenGL 3/4 compatibility. While OpenGL 3.0 / GLSL 1.30 support is basically in place with Mesa 8.0, there's still several newer revisions to OpenGL and the OpenGL Shading Language to be addressed. By Mesa 8.1 it looks like Intel hopes to have a large portion of the OpenGL 3.1 specification covered.
    Saying that there's just several new revisions is really understating things. The differences between GL 3.0 and GL 2.1 were a lot smaller than the differences between GL 3.3 and 3.0, not to mention the differences between 4.2 and 3.0.

    GL 3.2 will likely be the hardest revision to implement due to the requirement for an entire new geometry pipeline stage. 4.0 will also be hard, but I have a feeling that the various changes necessary to make plugging in new stages will be done during the GS updates, so hopefully that transition will be easier.

    Personally, I'd like to see the DSA extension added to Mesa soon. It's available on both AMD's and NVIDIA's drivers, and it's really nice to have.

  5. #5

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    I'd like to see:

    1) H.264 decoding implemented and working on r600 and newer hardware.
    2) Significant OpenGL performace improvements on r600 and newer hardware.

  6. #6
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    Quote Originally Posted by elanthis View Post
    Saying that there's just several new revisions is really understating things. The differences between GL 3.0 and GL 2.1 were a lot smaller than the differences between GL 3.3 and 3.0, not to mention the differences between 4.2 and 3.0.
    No. 3.0-4.2 maybe, but 3.0-3.3 is much smaller.

  7. #7
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    +1 power management.

    While sitting in meetings my laptop is quite noticeably the loudest (even though we all have the same fleet of laptops) because the fans are running at 100%, even when idling.

  8. #8
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    Quote Originally Posted by smitty3268 View Post
    No. 3.0-4.2 maybe, but 3.0-3.3 is much smaller.
    How do you figure? No major architectural features were added in 3.0 that I can recall which weren't already _widely_ available in GL 2.1 drivers. Mostly little stuff, like just mandating the support for FP formats, adding texture arrays, VAOs, and extended FBOs -- all little stuff. Oh, on vertex transformation -- I guess that may have been a big one to implement.

    3.1 adds a ton of new buffer types, geometry instancing, and a few other performance-essential features. 3.2 adds geometry shaders, and also fences (which I imagine are tricky to implement). 3.3 is probably the smallest of the 3.x releases (most of what I can remember as being useful in 3.3 are GLSL syntax/feature improvements that should be trivial to implement over 3.2, but there's probably other features I'm not remembering).

    Just getting geometry shaders in is going to be a massive undertaking. Proper instancing -- including all the various other features in GL 3.1 you need to actually use instancing effectively -- is also going to be a really big item.

  9. #9
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    Quote Originally Posted by elanthis View Post
    Saying that there's just several new revisions is really understating things. The differences between GL 3.0 and GL 2.1 were a lot smaller than the differences between GL 3.3 and 3.0, not to mention the differences between 4.2 and 3.0.

    GL 3.2 will likely be the hardest revision to implement due to the requirement for an entire new geometry pipeline stage. 4.0 will also be hard, but I have a feeling that the various changes necessary to make plugging in new stages will be done during the GS updates, so hopefully that transition will be easier.

    Personally, I'd like to see the DSA extension added to Mesa soon. It's available on both AMD's and NVIDIA's drivers, and it's really nice to have.
    Intel is apparently planning for 3.1 or 3.2 for 8.1 so I guess they are a little more optimistic (or it might mean that 8.1 is still a long ways off).
    Edit: Doh! Scratch that. I had it wrong, it was 3.1 for either 8.1 or 8.2.

    Geometry shaders is supposed to be partly implemented, at least according to docs/GL3.txt
    Last edited by whizse; 02-28-2012 at 07:01 AM.

  10. #10
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    Quote Originally Posted by gigaplex View Post
    r600g - better power management (runs ~10 degrees hotter than Windows while idling) plus fan speed control.
    thats is an kernel thing not mesa

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