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Intel Driver Now Enables Floating-Point Textures

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  • Intel Driver Now Enables Floating-Point Textures

    Phoronix: Intel Driver Now Enables Floating-Point Textures

    Intel's Mesa DRI driver now is unconditionally enabling floating-point textures. Up to this point, the floating-point textures feature of GL3 hasn't been enabled by default due to patent worries...

    http://www.phoronix.com/vr.php?view=MTI3OTY

  • #2
    I am happy with this, clever move:
    http://cgit.freedesktop.org/mesa/mes...57cf0044d8409e

    hopefully someone will disable that format for radeon/r200, i am only have issues with it:
    http://lists.freedesktop.org/archive...ry/032931.html

    actualy in that fbo case it picked up not working format also MESA_FORMAT_Z16 instead of MESA_FORMAT_X8_Z24.

    Don't know is it supported on these old radeons that Floating-Point Textures, even enabled in configure time it is not exposed on these old radeons.

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    • #3
      Who owns the floating-point texture patent?
      When does it expire?

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      • #4
        Originally posted by mark45 View Post
        Who owns the floating-point texture patent?
        When does it expire?
        S3 owned it, but they got purchased by HTC.

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        • #5
          Originally posted by mark45 View Post
          Who owns the floating-point texture patent?
          When does it expire?
          See the extension:

          IP Status

          SGI owns US Patent #6,650,327, issued November 18, 2003. SGI
          believes this patent contains necessary IP for graphics systems
          implementing floating point (FP) rasterization and FP framebuffer
          capabilities.

          SGI will not grant the ARB royalty-free use of this IP for use in
          OpenGL, but will discuss licensing on RAND terms, on an individual
          basis with companies wishing to use this IP in the context of
          conformant OpenGL implementations. SGI does not plan to make any
          special exemption for open source implementations.

          Contact Doug Crisman at SGI Legal for the complete IP disclosure.

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          • #6
            Does anybody know why they had a change of heart and decided to enable it?

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            • #7
              Originally posted by archibald View Post
              Does anybody know why they had a change of heart and decided to enable it?
              Probably because Intel already paid to SGI for using this patented algorithm with every single Intel GPU chip they sell. So they already paid for it - they can allow customers use it.

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