RE: [Openexr-devel] OpenEXR in OS X 10.4 ?

[Jason Mitchell]

   Format (i.e. 16 bit float) and dimension (i.e. 2D, rect, cube, volume) are orthogonal on all ATI hardware.

        -Jason

-----Original Message-----
From: Drew Hess [mailto:address@hidden]
Sent: Tuesday, June 29, 2004 10:16 AM
To: gary demos
Cc: address@hidden
Subject: Re: [Openexr-devel] OpenEXR in OS X 10.4 ?

Hi Gary,

Nvidia's cards have supported half since the GeForce FX 5xx0 and Quadro FX 2000 and 3000 series, but for textures, only RECT textures were supported, and RECTs can't be interpolated.

The GeForce FX 6800 and Quadro FX 4000 (and their PCI-Express equivalents) have full support for half, including 2D, 3D and cube textures.  So on the new generation of cards, half is as good a datatype as anything else.

ATI's R3xx-based cards also support a 16-bit FP format that's mostly compatible, but not exactly the same, as half, but I don't know whether there are any limitations on which texture formats support it.

Here's a blurb from Apple's WWDC schedule, pointed out to me by a little birdie, which briefly mentions support of OpenEXR:

http://developer.apple.com/wwdc/descriptions/index.html#207

If anyone can attend that and report back to the list, I'd love to hear about it.

-dwh-

On Tue, 29 Jun 2004, gary demos wrote:

>
> Drew and all,
>
> Apple has announced the 30" Large flat display, requiring the NVidia
> GEForce 6800 card.  Apparently the GEForce 6800 card is going to be
> supporting OpenExr half-16-float format,
>  according to rumors.  Of course, ILM worked with NVidia on the
> half-16-float format.
>
> As for which OS-X version, or which version of the 6800 NVidia card
> driver, I would also  like to know.  I would also like to see the
> half-16-float format supported directly to the
>  screen (with appropriate scaling and gamma controls, like the Photoshop
> OpenExr plugin).
>  I presume that the highest performance path to the screen will be
> OpenGL, but perhaps
>  there will be a faster way to write to the screen without tearing, with
> double (or triple)
>  buffering, and with keep-time picture sync and audio sync.  The
> "throw-it-to-the-screen-
>  whenever-you-have-it" mode limits the quality of moving images played
> out.  This becomes
>  even more challenging for bandwidth when 16-bits per color is used
> instead of 8-bits (although
>  I presume the 30" display itself is still 8-bits as the previous 23"
> Apple HD Cinema display).
>
> I am hopeful that the "movie mode" screen sync will be taken seriously
> when OpenExr  is supported for 24, 30, 60, and 72 frames per second
> image update and sync'd image refresh.
>
> -Gary Demos
>
>
> Drew Hess wrote:
>
> >I'm hearing rumors that Apple is going to ship OpenEXR as part of OS
> >X 10.4.  Unfortunately I don't have time to attend WWDC this week,
> >but apparently it's been mentioned in some of the developer sessions.
> >
> >Does anyone who can talk about it have more details?  I'm curious,
> >and none of us who actually work on the project have heard anything
> >beyond the rumors :)
> >
> >If true, it's great news as far as we're concerned, by the way....
> >
> >
> >-dwh-
> >
> >
> >
> >
> >
> >_______________________________________________
> >Openexr-devel mailing list
> >address@hidden
> >http://lists.nongnu.org/mailman/listinfo/openexr-devel
> >
> > 
> >
>
>
>
>

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