While rvu can (and historically has) executed a driver as an independent 
process, it is supposed to communicate with that driver via a couple of pipes.  
I didn't realize that it handed over execution to qtrvu.  There is a "slave 
mode" that reverses operation, permitting the display driver to call rvu as the 
parent process -- is that what qtrvu is doing, or does it copy all the sources 
for rendering or call the raycalls.c?  I guess I should familiarize myself with 
that source tree, but I've just been ignoring it up until now...

-Greg

> From: Georg Mischler <[email protected]>
> Subject: Re: [Radiance-dev] Winrview and Winimage sources
> Date: March 16, 2016 1:10:33 PM PDT
> 
> I see three topics there:
> 
> Image viewer
> Do we actually have another option for that on Windows?
> What does OpenStudio use?
> On a side note: The next Gimp version (3.10, currently in beta as
> 3.9.2) should be able to open HDR files. Though I suspect it will
> not include the tonemapping algorithms or other analysis
> functionality that we need here.
> Second side note: I just saw that the NREL binary package still
> has its image files as *.pic instead of *.hdr, is this deliberate?
> 
> Preview renderer
> First I'll have to try and get Winrview running again...
> Once we know it actually still works, I think Rob will be in the best
> position to make a judgement on which one (or which combination) fits
> the purpose best, and will be easier to grow more functionality with
> in the future.
> 
> I never looked at that "driver/output device" mechanism very closely.
> I think that in those cases where the "device" is actually a seperate
> program, whichever rvu executable got invoked first with that option
> will just hand over the job to its named sibling (that seems to be
> how qtrview works on unix right now). Unless I'm missing some detail,
> I don't think that will be a problem, even if there will probably be
> only one device available on Windows for now.
> 
> Test suite unification
> I think that one better goes into a seperate thread.
> 
> -schorsch

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