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Intel, AMD, NVIDIA Working To Reduce OpenGL Overhead

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  • Intel, AMD, NVIDIA Working To Reduce OpenGL Overhead

    Phoronix: Intel, AMD, NVIDIA Working To Reduce OpenGL Overhead

    Key OpenGL engineers from Intel, AMD, and NVIDIA will be presenting next month at the 2014 Game Developers Conference about reducing driver overhead with OpenGL...

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

  • #2
    The two Nv guys gave a similar presentation at the Steam days, so this is likely half copypaste from that.

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    • #3
      Yeah, here's the nvidia presentation at valve's conference which is certain to be pretty similar:

      https://www.youtube.com/watch?v=-bCe...KFtqR9TeZWMPjm

      There was a lot of good stuff in those videos. Also discussed was that Khronos came out with an official reference GLSL parser, called glslang (http://www.opengl.org/sdk/tools/glslang/). Valve is using it to test every time they commit a change to their shaders.

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      • #4
        I guess they will be presenting pretty the same techniques as was NVidia presenting at Steam Dev Days.

        More interesting stuff is that the key technique to reducing the number of draw calls is the GL_ARB_multi_draw_indirect extension that was created by AMD as GL_AMD_multi_draw_indirect in 2010 and later approved by Kronos.

        Looking at the Mantle API (or what is known about it) it looks like AMD wrapped all the advanced techniques from OpenGL, switched from GLSL to DirectX shaders (therefore no Linux support) and called it Mantle. I guess it was easier job than to fix their OpenGL drivers and convince game developers to use OpenGL with it thousands versions, profiles, extensions etc.

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        • #5
          This gives me a big question: If AMD knew that OpenGL would come close to zero driver overhead why create Mantle? You would hope that the reason is that Mantle is so superior that OpenGL could never catchup but... I am not sure.

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          • #6
            Originally posted by Ferdinand View Post
            This gives me a big question: If AMD knew that OpenGL would come close to zero driver overhead why create Mantle?
            Having your own "brand" is great for marketing. People love new and shiny.

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            • #7
              Originally posted by blackout23 View Post
              Having your own "brand" is great for marketing. People love new and shiny.
              If Intel and nVidia won't support mantle it will go the way of Glide and Physx.

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              • #8
                Nvidia, AMD, and Intel working together? Cats and dogs living together... mass hysteria!

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                • #9
                  Originally posted by Dukenukemx View Post
                  Nvidia, AMD, and Intel working together? Cats and dogs living together... mass hysteria!
                  This is not something new. How do you think OpenGL was developed?

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                  • #10
                    Originally posted by Jan Klesnil View Post
                    Looking at the Mantle API (or what is known about it) it looks like AMD wrapped all the advanced techniques from OpenGL, switched from GLSL to DirectX shaders (therefore no Linux support)
                    Porting hlsl parsing code to linux is anything but hard, you know.

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