Re: Mac 32 bit color depth?

[William Daffer <whdaffer(at)earthlink.net>]

"Joseph B. Gurman" <gurman@ari.net> writes:

> In article <thierry-2203011142210001@dualpants.dev.rsinc.com>, 
> thierry@NOSPAM.rsinc.com (Thierry Faucounau) wrote:
> 
> [snip]
> > 
> > I am not averse to returning the "usable" (from an IDL standpoint) visual
> > depth from get_visual_depth which would be 24 (essentially ignoring the
> > fact that on the Mac, all "true color" buffers are in fact 32bits) for 
> > the sake of portability.
> > 
> > --
> > Thierry Faucounau
> > Research Systems, Inc.
> 
> [snip]
> 
>     Thierry, that sounds very reasonable --- but it would be great to be 
> able to access the transparency channel: I would love to be able to 
> create movies (e.g. with XINTERANIMATE) in IDL that include transparency 
> effects.
> 
>     Any chance?
> 
>     Thanks,
> 
>                   Joe Gurman

  And wouldn't it make the creation of .png files a little easier?
  Don't they support a native RGBA?

whd
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