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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* Compute pixels for glare calculation |
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*/ |
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#include "copyright.h" |
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|
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#include <stdlib.h> |
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#include <string.h> |
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|
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#include "platform.h" |
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#include "rtprocess.h" /* Windows: must come first because of conflicts */ |
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#include "glare.h" |
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#include <sys/param.h> |
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/* compute rtrace buffer size */ |
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#ifndef PIPE_BUF |
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#define PIPE_BUF 512 /* hyperconservative */ |
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#endif |
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#define MAXPIX (PIPE_BUF/(6*sizeof(float)) - 1) |
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|
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#ifndef BSD |
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#define vfork fork |
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#endif |
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/* maximum rtrace buffer size */ |
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#define MAXPIX (4096/(6*sizeof(float))) |
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|
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#define MAXSBUF 524268 /* maximum total size of scanline buffer */ |
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#define MAXSBUF 786432 /* maximum total size of scanline buffer */ |
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#define HSIZE 317 /* size of scanline hash table */ |
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#define NRETIRE 16 /* number of scanlines to retire at once */ |
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int rt_pid = -1; /* process id for rtrace */ |
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int fd_tort, fd_fromrt; /* pipe descriptors */ |
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static SUBPROC rt_pd = SP_INACTIVE; /* process id & descriptors for rtrace */ |
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FILE *pictfp = NULL; /* picture file pointer */ |
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double exposure; /* picture exposure */ |
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#define scandata(sl) ((COLR *)((sl)+1)) |
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#define shash(y) ((y)%HSIZE) |
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static int maxpix; /* maximum number of pixels to buffer */ |
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|
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static SCAN *freelist; /* scanline free list */ |
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static SCAN *hashtab[HSIZE]; /* scanline hash table */ |
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|
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static long scanbufsiz; /* size of allocated scanline buffer */ |
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|
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static long ncall = 0L; /* number of calls to getpictscan */ |
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static long nread = 0L; /* number of scanlines read */ |
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static long nrecl = 0L; /* number of scanlines reclaimed */ |
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static int wrongformat = 0; |
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SCAN *scanretire(); |
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static SCAN * claimscan(int y); |
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static COLR * getpictscan(int y); |
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static double pict_val(FVECT vd); |
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static void rt_compute(float *pb, int np); |
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static gethfunc getexpos; |
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static SCAN * scanretire(void); |
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static void initscans(void); |
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static void donescans(void); |
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extern long ftell(); |
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SCAN * |
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claimscan(y) /* claim scanline from buffers */ |
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int y; |
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static SCAN * |
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claimscan( /* claim scanline from buffers */ |
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int y |
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) |
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{ |
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int hi = shash(y); |
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SCAN *slast; |
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register SCAN *sl; |
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SCAN *sl; |
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|
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for (sl = hashtab[hi]; sl != NULL; sl = sl->next) |
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if (sl->y == y) /* active scanline */ |
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} |
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COLR * |
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getpictscan(y) /* get picture scanline */ |
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int y; |
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static COLR * |
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getpictscan( /* get picture scanline */ |
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int y |
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) |
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{ |
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register SCAN *sl; |
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register int i; |
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SCAN *sl; |
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int i; |
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/* first check our buffers */ |
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sl = claimscan(y); |
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if (sl == NULL) |
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#ifdef DEBUG |
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pict_stats() /* print out picture read statistics */ |
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void |
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pict_stats(void) /* print out picture read statistics */ |
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{ |
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static long lastcall = 0L; /* ncall at last report */ |
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static long lastread = 0L; /* nread at last report */ |
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#endif |
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double |
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pict_val(vd) /* find picture value for view direction */ |
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FVECT vd; |
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static double |
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pict_val( /* find picture value for view direction */ |
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FVECT vd |
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) |
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{ |
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FVECT pp; |
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double vpx, vpy, vpz; |
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FVECT ip; |
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COLOR res; |
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|
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if (pictfp == NULL) |
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pp[0] = pictview.vp[0] + vd[0]; |
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pp[1] = pictview.vp[1] + vd[1]; |
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pp[2] = pictview.vp[2] + vd[2]; |
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viewpixel(&vpx, &vpy, &vpz, &pictview, pp); |
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if (vpz <= FTINY || vpx < 0. || vpx >= 1. || vpy < 0. || vpy >= 1.) |
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if (viewloc(ip, &pictview, pp) != VL_GOOD) |
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return(-1.0); |
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colr_color(res, getpictscan((int)(vpy*pysiz))[(int)(vpx*pxsiz)]); |
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colr_color(res, getpictscan((int)(ip[1]*pysiz))[(int)(ip[0]*pxsiz)]); |
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return(luminance(res)/exposure); |
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} |
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double |
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getviewpix(vh, vv) /* compute single view pixel */ |
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int vh, vv; |
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getviewpix( /* compute single view pixel */ |
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int vh, |
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int vv |
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) |
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{ |
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FVECT dir; |
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float rt_buf[6]; |
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float rt_buf[12]; |
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double res; |
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|
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if (compdir(dir, vh, vv) < 0) |
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npixinvw++; |
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if ((res = pict_val(dir)) >= 0.0) |
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return(res); |
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if (rt_pid == -1) { |
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if (!(rt_pd.flags & PF_RUNNING)) { |
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npixmiss++; |
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return(-1.0); |
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} |
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} |
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getviewspan(vv, vb) /* compute a span of view pixels */ |
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int vv; |
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float *vb; |
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void |
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getviewspan( /* compute a span of view pixels */ |
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int vv, |
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float *vb |
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) |
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{ |
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float rt_buf[6*MAXPIX]; /* rtrace send/receive buffer */ |
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register int n; /* number of pixels in buffer */ |
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int n; /* number of pixels in buffer */ |
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short buf_vh[MAXPIX]; /* pixel positions */ |
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FVECT dir; |
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register int vh; |
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int vh; |
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|
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#ifdef DEBUG |
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if (verbose) |
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npixinvw++; |
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if ((vb[vh+hsize] = pict_val(dir)) >= 0.0) |
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continue; |
243 |
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if (rt_pid == -1) { /* missing information */ |
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> |
if (!(rt_pd.flags & PF_RUNNING)) { /* missing information */ |
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npixmiss++; |
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continue; |
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} |
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/* send to rtrace */ |
248 |
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if (n >= MAXPIX) { /* flush */ |
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> |
if (n >= maxpix) { /* flush */ |
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rt_compute(rt_buf, n); |
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while (n-- > 0) |
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while (n > 0) { |
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--n; |
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vb[buf_vh[n]+hsize] = luminance(rt_buf+3*n); |
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} |
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} |
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rt_buf[6*n] = ourview.vp[0]; |
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rt_buf[6*n+1] = ourview.vp[1]; |
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} |
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rt_compute(pb, np) /* process buffer through rtrace */ |
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float *pb; |
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int np; |
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static void |
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rt_compute( /* process buffer through rtrace */ |
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float *pb, |
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int np |
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) |
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{ |
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static float nbuf[6] = {0.,0.,0.,0.,0.,0.}; |
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|
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#ifdef DEBUG |
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if (verbose && np > 1) |
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fprintf(stderr, "%s: sending %d samples to rtrace...\n", |
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progname, np); |
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#endif |
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< |
if (writebuf(fd_tort,(char *)pb,6*sizeof(float)*np) < 6*sizeof(float)*np |
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|| writebuf(fd_tort,(char *)nbuf,sizeof(nbuf)) < sizeof(nbuf)) { |
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fprintf(stderr, "%s: error writing to rtrace process\n", |
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memset(pb+6*np, '\0', 6*sizeof(float)); |
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if (process(&rt_pd, pb, pb, 3*sizeof(float)*(np+1), |
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6*sizeof(float)*(np+1)) < 3*sizeof(float)*(np+1)) { |
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fprintf(stderr, "%s: rtrace communication error\n", |
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progname); |
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exit(1); |
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} |
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if (readbuf(fd_fromrt, (char *)pb, 3*sizeof(float)*np) |
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< 3*sizeof(float)*np) { |
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fprintf(stderr, "%s: error reading from rtrace process\n", |
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progname); |
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exit(1); |
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} |
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} |
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getexpos(s) /* get exposure from header line */ |
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char *s; |
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static int |
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getexpos( /* get exposure from header line */ |
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char *s, |
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void *p |
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) |
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{ |
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< |
char fmt[32]; |
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char fmt[MAXFMTLEN]; |
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|
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if (isexpos(s)) |
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exposure *= exposval(s); |
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formatval(fmt, s); |
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wrongformat = strcmp(fmt, COLRFMT); |
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} |
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return(0); |
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} |
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open_pict(fn) /* open picture file */ |
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char *fn; |
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> |
void |
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> |
open_pict( /* open picture file */ |
316 |
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char *fn |
317 |
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) |
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{ |
319 |
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if ((pictfp = fopen(fn, "r")) == NULL) { |
320 |
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fprintf("%s: cannot open\n", fn); |
320 |
> |
fprintf(stderr, "%s: cannot open\n", fn); |
321 |
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exit(1); |
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} |
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SET_FILE_BINARY(pictfp); |
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exposure = 1.0; |
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getheader(pictfp, getexpos, NULL); |
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if (wrongformat || |
327 |
< |
fgetresolu(&pxsiz, &pysiz, pictfp) != (YMAJOR|YDECR)) { |
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< |
fprintf("%s: bad picture format\n", fn); |
326 |
> |
if (wrongformat || !fscnresolu(&pxsiz, &pysiz, pictfp)) { |
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> |
fprintf(stderr, "%s: incompatible picture format\n", fn); |
328 |
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exit(1); |
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} |
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initscans(); |
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} |
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close_pict() /* done with picture */ |
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void |
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close_pict(void) /* done with picture */ |
336 |
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{ |
337 |
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if (pictfp == NULL) |
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return; |
342 |
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} |
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fork_rtrace(av) /* open pipe and start rtrace */ |
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< |
char *av[]; |
345 |
> |
void |
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fork_rtrace( /* open pipe and start rtrace */ |
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> |
char *av[] |
348 |
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) |
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{ |
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< |
int p0[2], p1[2]; |
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int rval; |
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< |
if (pipe(p0) < 0 || pipe(p1) < 0) { |
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rval = open_process(&rt_pd, av); |
353 |
> |
if (rval < 0) { |
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perror(progname); |
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exit(1); |
356 |
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} |
357 |
< |
if ((rt_pid = vfork()) == 0) { /* if child */ |
358 |
< |
close(p0[1]); |
340 |
< |
close(p1[0]); |
341 |
< |
if (p0[0] != 0) { /* connect p0 to stdin */ |
342 |
< |
dup2(p0[0], 0); |
343 |
< |
close(p0[0]); |
344 |
< |
} |
345 |
< |
if (p1[1] != 0) { /* connect p1 to stdout */ |
346 |
< |
dup2(p1[1], 1); |
347 |
< |
close(p1[1]); |
348 |
< |
} |
349 |
< |
execvp(av[0], av); |
350 |
< |
perror(av[0]); |
351 |
< |
_exit(127); |
352 |
< |
} |
353 |
< |
if (rt_pid == -1) { |
354 |
< |
perror(progname); |
357 |
> |
if (rval == 0) { |
358 |
> |
fprintf(stderr, "%s: command not found\n", av[0]); |
359 |
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exit(1); |
360 |
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} |
361 |
< |
close(p0[0]); |
362 |
< |
close(p1[1]); |
363 |
< |
fd_tort = p0[1]; |
364 |
< |
fd_fromrt = p1[0]; |
361 |
> |
maxpix = rval/(6*sizeof(float)); |
362 |
> |
if (maxpix > MAXPIX) |
363 |
> |
maxpix = MAXPIX; |
364 |
> |
maxpix--; |
365 |
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} |
366 |
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368 |
< |
done_rtrace() /* wait for rtrace to finish */ |
368 |
> |
void |
369 |
> |
done_rtrace(void) /* wait for rtrace to finish */ |
370 |
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{ |
371 |
< |
int pid, status; |
371 |
> |
int status; |
372 |
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|
373 |
< |
if (rt_pid == -1) |
374 |
< |
return; |
370 |
< |
close(fd_tort); |
371 |
< |
close(fd_fromrt); |
372 |
< |
while ((pid = wait(&status)) != -1 && pid != rt_pid) |
373 |
< |
; |
374 |
< |
if (pid == rt_pid && status != 0) { |
373 |
> |
status = close_process(&rt_pd); |
374 |
> |
if (status > 0) { |
375 |
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fprintf(stderr, "%s: bad status (%d) from rtrace\n", |
376 |
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progname, status); |
377 |
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exit(1); |
378 |
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} |
379 |
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rt_pid = -1; |
379 |
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} |
380 |
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|
381 |
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|
382 |
< |
int |
383 |
< |
readbuf(fd, bpos, siz) |
385 |
< |
int fd; |
386 |
< |
char *bpos; |
387 |
< |
int siz; |
382 |
> |
static SCAN * |
383 |
> |
scanretire(void) /* retire old scanlines to free list */ |
384 |
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{ |
389 |
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register int cc, nrem = siz; |
390 |
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|
391 |
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while (nrem > 0 && (cc = read(fd, bpos, nrem)) > 0) { |
392 |
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bpos += cc; |
393 |
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nrem -= cc; |
394 |
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} |
395 |
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if (cc < 0) |
396 |
– |
return(cc); |
397 |
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return(siz-nrem); |
398 |
– |
} |
399 |
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|
400 |
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|
401 |
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int |
402 |
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writebuf(fd, bpos, siz) |
403 |
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char *bpos; |
404 |
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int siz; |
405 |
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{ |
406 |
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register int cc, nrem = siz; |
407 |
– |
|
408 |
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while (nrem > 0 && (cc = write(fd, bpos, nrem)) > 0) { |
409 |
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bpos += cc; |
410 |
– |
nrem -= cc; |
411 |
– |
} |
412 |
– |
if (cc < 0) |
413 |
– |
return(cc); |
414 |
– |
return(siz-nrem); |
415 |
– |
} |
416 |
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|
417 |
– |
|
418 |
– |
SCAN * |
419 |
– |
scanretire() /* retire old scanlines to free list */ |
420 |
– |
{ |
385 |
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SCAN *sold[NRETIRE]; |
386 |
|
int n; |
387 |
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int h; |
388 |
< |
register SCAN *sl; |
389 |
< |
register int i; |
388 |
> |
SCAN *sl; |
389 |
> |
int i; |
390 |
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/* grab the NRETIRE oldest scanlines */ |
391 |
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sold[n = 0] = NULL; |
392 |
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for (h = 0; h < HSIZE; h++) |
423 |
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static char *scan_buf; |
424 |
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|
425 |
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|
426 |
< |
initscans() /* initialize scanline buffers */ |
426 |
> |
static void |
427 |
> |
initscans(void) /* initialize scanline buffers */ |
428 |
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{ |
429 |
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int scansize; |
430 |
< |
register SCAN *ptr; |
431 |
< |
register int i; |
430 |
> |
SCAN *ptr; |
431 |
> |
int i; |
432 |
|
/* initialize positions */ |
433 |
< |
scanpos = (long *)malloc(pysiz*sizeof(long)); |
433 |
> |
scanpos = (long *)bmalloc(pysiz*sizeof(long)); |
434 |
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if (scanpos == NULL) |
435 |
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memerr("scanline positions"); |
436 |
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for (i = pysiz-1; i >= 0; i--) |
441 |
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hashtab[i] = NULL; |
442 |
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/* allocate scanline buffers */ |
443 |
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scansize = sizeof(SCAN) + pxsiz*sizeof(COLR); |
444 |
< |
#ifdef ALIGN |
445 |
< |
scansize = scansize+(sizeof(ALIGN)-1)) & ~(sizeof(ALIGN)-1); |
444 |
> |
#ifdef ALIGNT |
445 |
> |
scansize = scansize+(sizeof(ALIGNT)-1) & ~(sizeof(ALIGNT)-1); |
446 |
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#endif |
447 |
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i = MAXSBUF / scansize; /* compute number to allocate */ |
448 |
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if (i > HSIZE) |
449 |
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i = HSIZE; |
450 |
< |
scan_buf = malloc(i*scansize); /* get in one big chunk */ |
450 |
> |
scanbufsiz = i*scansize; |
451 |
> |
scan_buf = bmalloc(scanbufsiz); /* get in one big chunk */ |
452 |
|
if (scan_buf == NULL) |
453 |
|
memerr("scanline buffers"); |
454 |
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ptr = (SCAN *)scan_buf; |
463 |
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} |
464 |
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|
465 |
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|
466 |
< |
donescans() /* free up scanlines */ |
466 |
> |
static void |
467 |
> |
donescans(void) /* free up scanlines */ |
468 |
|
{ |
469 |
< |
free(scan_buf); |
470 |
< |
free((char *)scanpos); |
469 |
> |
bfree(scan_buf, scanbufsiz); |
470 |
> |
bfree((char *)scanpos, pysiz*sizeof(long)); |
471 |
|
} |