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#ifndef lint |
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static const char RCSid[] = "$Id: raypwin.c,v 2.8 2010/10/26 03:45:35 greg Exp $"; |
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#endif |
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/* |
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* raypwin.c - interface for parallel rendering using Radiance (Windows ver) |
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* |
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* External symbols declared in ray.h |
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*/ |
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|
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#include "copyright.h" |
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|
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/* |
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* See raypcalls.c for an explanation of these routines. |
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*/ |
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|
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/***** XXX CURRENTLY, THIS IS JUST A COLLECTION OF IMPOTENT STUBS XXX *****/ |
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|
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#include "ray.h" |
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|
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int ray_pnprocs = 0; /* number of child processes */ |
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int ray_pnidle = 0; /* number of idle children */ |
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|
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static RAY queued_ray; |
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|
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void |
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ray_pinit( /* initialize ray-tracing processes */ |
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char *otnm, |
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int nproc |
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) |
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{ |
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ray_pdone(0); |
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ray_init(otnm); |
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ray_popen(nproc); |
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} |
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|
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|
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int |
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ray_psend( /* add a ray to our send queue */ |
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RAY *r |
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) |
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{ |
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if (r == NULL) |
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return(0); |
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if (ray_pnidle <= 0) |
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return(0); |
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queued_ray = *r; |
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ray_pnidle = 0; |
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return(1); |
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} |
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|
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|
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int |
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ray_pqueue( /* queue a ray for computation */ |
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RAY *r |
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) |
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{ |
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RNUMBER rno; |
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|
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if (r == NULL) |
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return(0); |
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if (ray_pnidle <= 0) { |
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RAY new_ray = *r; |
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*r = queued_ray; |
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queued_ray = new_ray; |
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} |
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rno = r->rno; |
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r->rno = raynum++; |
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samplendx++; |
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rayvalue(r); |
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r->rno = rno; |
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return(1); |
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} |
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|
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|
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int |
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ray_presult( /* check for a completed ray */ |
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RAY *r, |
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int poll |
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) |
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{ |
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if (r == NULL) |
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return(0); |
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if (ray_pnidle <= 0) { |
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*r = queued_ray; |
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r->rno = raynum++; |
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samplendx++; |
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rayvalue(r); |
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r->rno = queued_ray.rno; |
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ray_pnidle = 1; |
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return(1); |
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} |
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return(0); |
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} |
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|
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|
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void |
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ray_pdone( /* reap children and free data */ |
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int freall |
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) |
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{ |
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ray_done(freall); |
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ray_pnprocs = ray_pnidle = 0; |
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} |
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|
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|
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void |
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ray_popen( /* open the specified # processes */ |
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int nadd |
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) |
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{ |
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if (ray_pnprocs + nadd > 1) { |
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error(WARNING, "only single process supported"); |
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nadd = 1 - ray_pnprocs; |
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} |
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ray_pnprocs += nadd; |
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ray_pnidle += nadd; |
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} |
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|
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|
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void |
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ray_pclose( /* close one or more child processes */ |
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int nsub |
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) |
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{ |
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if ((nsub <= 0) | (nsub > ray_pnprocs)) |
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nsub = ray_pnprocs; |
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ray_pnprocs -= nsub; |
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if ((ray_pnidle -= nsub) < 0) |
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ray_pnidle = 0; |
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} |
