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Thread: GL_ARB_pixel_buffer_object

  1. #1
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    GL_ARB_pixel_buffer_object

    In the doc to lates nVidia 52.16 drivers is written, they support GL_ARB_pixel_buffer_object. After the drivesrs instalation, this extesnion is not visible. Documentation for this extensions is non-accesible as well. Anybody have some information ?
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  2. #2
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    Re: GL_ARB_pixel_buffer_object

    It could be the ARB version of NV_pixel_data_range. I hope it is.

    [This message has been edited by Adrian (edited 10-25-2003).]

  3. #3
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    Re: GL_ARB_pixel_buffer_object

    Either that or a redifining of how textures are used/definded. Upon noticing that none of the functions for ARB_vbo uses the word vertex, I thought it'd be interesting if the same functionality were used for -any- data buffered on the video card. Also, it's hard not to notice that textures often store data other than colourmaps, which is what by definition 'texture' generally refers to.

    I'm probably entirely wrong, though. I don't really think that there's any reason to redifine textures in OpenGL 1.x.

  4. #4
    Senior Member OpenGL Pro Zengar's Avatar
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    Re: GL_ARB_pixel_buffer_object

    Originally posted by Ostsol:
    Upon noticing that none of the functions for ARB_vbo uses the word vertex, I thought it'd be interesting if the same functionality were used for -any- data buffered on the video card.
    = supperbuffers

    ARB_pixel_buffer object would be nice, yes

  5. #5
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    Re: GL_ARB_pixel_buffer_object

    ARB_pixel_buffer object would be nice, yes
    This was something of a minor controversy when ATi's presentation on the progress of the superbuffers extension came out. The API for using a buffer as source vertex data was very different from the VBO API. The best reasoning for this that we were able to come up with was the fact that, at the time, VBO was still an extension, and not part of the eventual 1.5 core. As such, they probably felt that binding the superbuffers extension to another extension would be a bad idea.

    In any case, whether they use the VBO API or their own, ARB_superbuffers should be able to handle NV_pixel_data_range just fine. Unless there's some functionality there that I don't know about.

  6. #6
    Senior Member OpenGL Pro Zengar's Avatar
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    Re: GL_ARB_pixel_buffer_object

    I guess pixel_buffer_object could be the long awaited superbuffers extension. Moreover, in the release notes of 5x.xx NVidia claims to support floating-point textures under DirectX(currently disabled). If that is true, ABR_pixel_buffer_object could provide same functionality, maybe eliminating the need of pbuffers.

  7. #7
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    Re: GL_ARB_pixel_buffer_object

    Moreover, in the release notes of 5x.xx NVidia claims to support floating-point textures under DirectX(currently disabled)
    GL_FALSE

    + I installed 5216 and DX Caps Viewer showed no FP formats



    [This message has been edited by MZ (edited 10-27-2003).]

  8. #8
    Advanced Member Frequent Contributor cass's Avatar
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    Re: GL_ARB_pixel_buffer_object

    VBO is to VAR as PBO is to PDR.

    Superbuffers is a whole other thing with a much broader scope (and some inevitable overlap as well).

    Thanks -
    Cass
    Cass Everitt -- cass@xyzw.us

  9. #9
    Senior Member OpenGL Pro Zengar's Avatar
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    Re: GL_ARB_pixel_buffer_object

    Yuhuu! Nice to hear from you, cass. You come always when one has already given up the hope BTW, I find your nvidia presentations simply excelent! When will we have the spec(if it's not a secret)?

  10. #10
    Advanced Member Frequent Contributor cass's Avatar
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    Re: GL_ARB_pixel_buffer_object

    Hi Zengar,

    Thanks!

    I can't really say when specs will be available, as they depend on how long the standardization process takes. It's possible that the ARB could supply a public draft as was done with the GLSL effort.

    Thanks -
    Cass
    Cass Everitt -- cass@xyzw.us

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