expose public API

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Currently a client renderer needs to reach into the guts of OSL in order to 
compile. Here are 
some of the pieces that need to be public:

Header oslconfig.h

Definition of ShadingContext, RendererServices, ShadingSystem, ClosureColor.

Probably some more - I'm having a hard time keeping all these new classes 
straight.

10/09/09 16:29:04 changed by lg 

ShadingContext? and ShadingSystemImpl? are just temporary -- that reaching into 
the guts are 
merely covering up that I have work to do on the ShadingSystem? public class to 
make it right.

10/09/09 16:36:50 changed by ckulla 

I see - I guess we can't do this now then.

We also need:

ClosurePrimitive
ShaderUse
10/09/09 16:43:37 changed by lg 

ClosurePrimitive? is in oslclosure.h, already one of the public headers.

ShaderUse? is in osl_pvt.h, we can move it to a public area. But where do we 
use it on the other 
side of the interface? I don't see it referenced in Arnold.

10/09/09 16:51:05 changed by ckulla ¶

ctx->execute (ShadUseSurface);

Presumably there would be a similar line for displacement.

This doesn't need to be all fixed right away, I was just making a list of 
things as I thought of 
them.

oslconfig.h and export.h probably need to become public soon though, otherwise 
none of the 
currently public headers work.

On a related note: can we move the public headers to be on their own? I find it 
very confusing to 
have a folder with both public and private headers. I end up having to run make 
and look inside 
dist to see what's really public. Same comment for OIIO.

Original issue reported on code.google.com by rene.lim...@gmail.com on 11 Jan 2010 at 6:07

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Original comment by rene.lim...@gmail.com on 13 Jan 2010 at 1:28

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