[Paracomp-spec] [Fwd: Re: RFC : Extension EXT_datatype_float - floating point datatypes for compositing]

[Balázs T. <tb...@gm...>]

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From: Csébfalvi Balázs <cs...@ii...>
Date: Mon, 7 Jul 2008 16:54:46 +0200
Subject: RE: [Fwd: Re: [Paracomp-spec] RFC : Extension EXT_datatype_float - floating point datatypes for compositing]

Hi Shree,

I think using 16 bits for just the W component would be appropriate
especially for applications requiring front-to-back compositing, but the
lack of precision in the color channels would still lead to some accumulated
error. The integer format might also be advantageous if the compositing
operator is not necessarily the classical alpha-blending. For example, there
are applications, where only the geometrical primitives projected onto a
given pixel have to be counted, or the unique integer ID of the closest
primitive has to be obtained in the given pixel in order to reference it in
a subsequent pass.

Regards,

Balazs
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