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/* Copyright (c) 1994 Regents of the University of California */ |
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|
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#ifndef lint |
4 |
static char SCCSid[] = "$SunId$ LBL"; |
5 |
#endif |
6 |
|
7 |
/* |
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* rpict.c - routines and variables for picture generation. |
9 |
* |
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* 8/14/85 |
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*/ |
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|
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#include "ray.h" |
14 |
|
15 |
#include <sys/types.h> |
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|
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#ifndef NIX |
18 |
#ifdef BSD |
19 |
#include <sys/time.h> |
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#include <sys/resource.h> |
21 |
#else |
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#include <sys/times.h> |
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#include <sys/utsname.h> |
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#include <unistd.h> |
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#endif |
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#endif |
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|
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extern time_t time(); |
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|
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#include <signal.h> |
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|
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#include "view.h" |
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|
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#include "resolu.h" |
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|
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#include "random.h" |
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|
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#include "paths.h" |
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|
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#define RFTEMPLATE "rfXXXXXX" |
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|
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#ifndef SIGCONT |
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#define SIGCONT SIGIO |
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#endif |
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|
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int dimlist[MAXDIM]; /* sampling dimensions */ |
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int ndims = 0; /* number of sampling dimensions */ |
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int samplendx; /* sample index number */ |
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|
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VIEW ourview = STDVIEW; /* view parameters */ |
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int hresolu = 512; /* horizontal resolution */ |
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int vresolu = 512; /* vertical resolution */ |
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double pixaspect = 1.0; /* pixel aspect ratio */ |
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|
55 |
int psample = 4; /* pixel sample size */ |
56 |
double maxdiff = .05; /* max. difference for interpolation */ |
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double dstrpix = 0.67; /* square pixel distribution */ |
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|
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double dstrsrc = 0.0; /* square source distribution */ |
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double shadthresh = .05; /* shadow threshold */ |
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double shadcert = .5; /* shadow certainty */ |
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int directrelay = 1; /* number of source relays */ |
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int vspretest = 512; /* virtual source pretest density */ |
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int directvis = 1; /* sources visible? */ |
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double srcsizerat = .25; /* maximum ratio source size/dist. */ |
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|
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double specthresh = .15; /* specular sampling threshold */ |
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double specjitter = 1.; /* specular sampling jitter */ |
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|
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int backvis = 1; /* back face visibility */ |
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|
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int maxdepth = 6; /* maximum recursion depth */ |
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double minweight = 5e-3; /* minimum ray weight */ |
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|
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COLOR ambval = BLKCOLOR; /* ambient value */ |
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double ambacc = 0.2; /* ambient accuracy */ |
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int ambres = 32; /* ambient resolution */ |
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int ambdiv = 128; /* ambient divisions */ |
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int ambssamp = 0; /* ambient super-samples */ |
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int ambounce = 0; /* ambient bounces */ |
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char *amblist[128]; /* ambient include/exclude list */ |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
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|
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#ifdef MSDOS |
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int ralrm = 60; /* seconds between reports */ |
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#else |
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int ralrm = 0; /* seconds between reports */ |
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#endif |
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|
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double pctdone = 0.0; /* percentage done */ |
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|
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time_t tlastrept = 0L; /* time at last report */ |
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|
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extern time_t tstart; /* starting time */ |
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|
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extern unsigned long nrays; /* number of rays traced */ |
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|
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#define MAXDIV 16 /* maximum sample size */ |
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|
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#define pixjitter() (.5+dstrpix*(.5-frandom())) |
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|
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static int hres, vres; /* resolution for this frame */ |
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|
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extern char *mktemp(); |
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|
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double pixvalue(); |
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|
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#ifdef NIX |
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#define file_exists(f) (access(f,F_OK)==0) |
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#else |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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int |
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file_exists(fname) /* ordinary file exists? */ |
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char *fname; |
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{ |
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struct stat sbuf; |
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if (stat(fname, &sbuf) < 0) return(0); |
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return((sbuf.st_mode & S_IFREG) != 0); |
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} |
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#endif |
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|
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|
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quit(code) /* quit program */ |
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int code; |
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{ |
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if (code) /* report status */ |
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report(); |
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headclean(); /* delete header file */ |
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pfclean(); /* clean up persist files */ |
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exit(code); |
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} |
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|
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|
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#ifndef NIX |
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report() /* report progress */ |
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{ |
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double u, s; |
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#ifdef BSD |
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char hostname[257]; |
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struct rusage rubuf; |
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#else |
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struct tms tbuf; |
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struct utsname nambuf; |
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double period; |
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#define hostname nambuf.nodename |
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#endif |
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|
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tlastrept = time((time_t *)NULL); |
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#ifdef BSD |
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getrusage(RUSAGE_SELF, &rubuf); |
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u = rubuf.ru_utime.tv_sec + rubuf.ru_utime.tv_usec/1e6; |
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s = rubuf.ru_stime.tv_sec + rubuf.ru_stime.tv_usec/1e6; |
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getrusage(RUSAGE_CHILDREN, &rubuf); |
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u += rubuf.ru_utime.tv_sec + rubuf.ru_utime.tv_usec/1e6; |
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s += rubuf.ru_stime.tv_sec + rubuf.ru_stime.tv_usec/1e6; |
157 |
gethostname(hostname, sizeof(hostname)); |
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#else |
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times(&tbuf); |
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#ifdef _SC_CLK_TCK |
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period = 1.0 / sysconf(_SC_CLK_TCK); |
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#else |
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period = 1.0 / 60.0; |
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#endif |
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u = ( tbuf.tms_utime + tbuf.tms_cutime ) * period; |
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s = ( tbuf.tms_stime + tbuf.tms_cstime ) * period; |
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uname(&nambuf); |
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#endif |
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|
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sprintf(errmsg, |
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"%lu rays, %4.2f%% after %.3fu %.3fs %.3fr hours on %s\n", |
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nrays, pctdone, u/3600., s/3600., |
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(tlastrept-tstart)/3600., hostname); |
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eputs(errmsg); |
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#ifndef BSD |
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signal(SIGCONT, report); |
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#undef hostname |
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#endif |
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} |
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#else |
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report() /* report progress */ |
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{ |
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tlastrept = time((time_t *)NULL); |
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sprintf(errmsg, "%lu rays, %4.2f%% after %5.4f hours\n", |
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nrays, pctdone, (tlastrept-tstart)/3600.0); |
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eputs(errmsg); |
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} |
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#endif |
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|
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|
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rpict(seq, pout, zout, prvr) /* generate image(s) */ |
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int seq; |
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char *pout, *zout, *prvr; |
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/* |
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* If seq is greater than zero, then we will render a sequence of |
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* images based on view parameter strings read from the standard input. |
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* If pout is NULL, then all images will be sent to the standard ouput. |
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* If seq is greater than zero and prvr is an integer, then it is the |
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* frame number at which rendering should begin. Preceeding view parameter |
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* strings will be skipped in the input. |
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* If pout and prvr are the same, prvr is renamed to avoid overwriting. |
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* Note that pout and zout should contain %d format specifications for |
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* sequenced file naming. |
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*/ |
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{ |
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extern char *rindex(), *strncpy(), *strcat(), *strcpy(); |
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char fbuf[128], fbuf2[128]; |
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int npicts; |
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register char *cp; |
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RESOLU rs; |
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double pa; |
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/* check sampling */ |
213 |
if (psample < 1) |
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psample = 1; |
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else if (psample > MAXDIV) { |
216 |
sprintf(errmsg, "pixel sampling reduced from %d to %d", |
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psample, MAXDIV); |
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error(WARNING, errmsg); |
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psample = MAXDIV; |
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} |
221 |
/* get starting frame */ |
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if (seq <= 0) |
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seq = 0; |
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else if (prvr != NULL && isint(prvr)) { |
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register int rn; /* skip to specified view */ |
226 |
if ((rn = atoi(prvr)) < seq) |
227 |
error(USER, "recover frame less than start frame"); |
228 |
if (pout == NULL) |
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error(USER, "missing output file specification"); |
230 |
for ( ; seq < rn; seq++) |
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if (nextview(stdin) == EOF) |
232 |
error(USER, "unexpected EOF on view input"); |
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prvr = fbuf; /* mark for renaming */ |
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} |
235 |
if (pout != NULL & prvr != NULL) { |
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sprintf(fbuf, pout, seq); |
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if (!strcmp(prvr, fbuf)) { /* rename */ |
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strcpy(fbuf2, fbuf); |
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for (cp = fbuf2; *cp; cp++) |
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; |
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while (cp > fbuf2 && !ISDIRSEP(cp[-1])) |
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cp--; |
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strcpy(cp, RFTEMPLATE); |
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prvr = mktemp(fbuf2); |
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if (rename(fbuf, prvr) < 0) |
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if (errno == ENOENT) { /* ghost file */ |
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sprintf(errmsg, |
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"new output file \"%s\"", |
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fbuf); |
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error(WARNING, errmsg); |
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prvr = NULL; |
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} else { /* serious error */ |
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sprintf(errmsg, |
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"cannot rename \"%s\" to \"%s\"", |
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fbuf, prvr); |
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error(SYSTEM, errmsg); |
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} |
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} |
259 |
} |
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npicts = 0; /* render sequence */ |
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do { |
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if (seq && nextview(stdin) == EOF) |
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break; |
264 |
pctdone = 0.0; |
265 |
if (pout != NULL) { |
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sprintf(fbuf, pout, seq); |
267 |
if (file_exists(fbuf)) { |
268 |
if (prvr != NULL || !strcmp(fbuf, pout)) { |
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sprintf(errmsg, |
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"output file \"%s\" exists", |
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fbuf); |
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error(USER, errmsg); |
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} |
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continue; /* don't clobber */ |
275 |
} |
276 |
if (freopen(fbuf, "w", stdout) == NULL) { |
277 |
sprintf(errmsg, |
278 |
"cannot open output file \"%s\"", fbuf); |
279 |
error(SYSTEM, errmsg); |
280 |
} |
281 |
#ifdef MSDOS |
282 |
setmode(fileno(stdout), O_BINARY); |
283 |
#endif |
284 |
dupheader(); |
285 |
} |
286 |
hres = hresolu; vres = vresolu; pa = pixaspect; |
287 |
if (prvr != NULL) |
288 |
if (viewfile(prvr, &ourview, &rs) <= 0 |
289 |
|| rs.or != PIXSTANDARD) { |
290 |
sprintf(errmsg, |
291 |
"cannot recover view parameters from \"%s\"", prvr); |
292 |
error(WARNING, errmsg); |
293 |
} else { |
294 |
pa = 0.0; |
295 |
hres = scanlen(&rs); |
296 |
vres = numscans(&rs); |
297 |
} |
298 |
if ((cp = setview(&ourview)) != NULL) |
299 |
error(USER, cp); |
300 |
normaspect(viewaspect(&ourview), &pa, &hres, &vres); |
301 |
if (seq) { |
302 |
if (ralrm > 0) { |
303 |
fprintf(stderr, "FRAME %d:", seq); |
304 |
fprintview(&ourview, stderr); |
305 |
putc('\n', stderr); |
306 |
fflush(stderr); |
307 |
} |
308 |
printf("FRAME=%d\n", seq); |
309 |
} |
310 |
fputs(VIEWSTR, stdout); |
311 |
fprintview(&ourview, stdout); |
312 |
putchar('\n'); |
313 |
if (pa < .99 || pa > 1.01) |
314 |
fputaspect(pa, stdout); |
315 |
fputformat(COLRFMT, stdout); |
316 |
putchar('\n'); |
317 |
if (zout != NULL) |
318 |
sprintf(cp=fbuf, zout, seq); |
319 |
else |
320 |
cp = NULL; |
321 |
render(cp, prvr); |
322 |
prvr = NULL; |
323 |
npicts++; |
324 |
} while (seq++); |
325 |
/* check that we did something */ |
326 |
if (npicts == 0) |
327 |
error(WARNING, "no output produced"); |
328 |
} |
329 |
|
330 |
|
331 |
nextview(fp) /* get next view from fp */ |
332 |
FILE *fp; |
333 |
{ |
334 |
char linebuf[256]; |
335 |
|
336 |
while (fgets(linebuf, sizeof(linebuf), fp) != NULL) |
337 |
if (isview(linebuf) && sscanview(&ourview, linebuf) > 0) |
338 |
return(0); |
339 |
return(EOF); |
340 |
} |
341 |
|
342 |
|
343 |
render(zfile, oldfile) /* render the scene */ |
344 |
char *zfile, *oldfile; |
345 |
{ |
346 |
extern long lseek(); |
347 |
COLOR *scanbar[MAXDIV+1]; /* scanline arrays of pixel values */ |
348 |
float *zbar[MAXDIV+1]; /* z values */ |
349 |
char *sampdens; /* previous sample density */ |
350 |
int ypos; /* current scanline */ |
351 |
int ystep; /* current y step size */ |
352 |
int hstep; /* h step size */ |
353 |
int zfd; |
354 |
COLOR *colptr; |
355 |
float *zptr; |
356 |
register int i; |
357 |
/* allocate scanlines */ |
358 |
for (i = 0; i <= psample; i++) { |
359 |
scanbar[i] = (COLOR *)malloc(hres*sizeof(COLOR)); |
360 |
if (scanbar[i] == NULL) |
361 |
goto memerr; |
362 |
} |
363 |
hstep = (psample*140+49)/99; /* quincunx sampling */ |
364 |
ystep = (psample*99+70)/140; |
365 |
if (hstep > 2) { |
366 |
i = hres/hstep + 2; |
367 |
if ((sampdens = malloc(i)) == NULL) |
368 |
goto memerr; |
369 |
while (i--) |
370 |
sampdens[i] = hstep; |
371 |
} else |
372 |
sampdens = NULL; |
373 |
/* open z-file */ |
374 |
if (zfile != NULL) { |
375 |
if ((zfd = open(zfile, O_WRONLY|O_CREAT, 0666)) == -1) { |
376 |
sprintf(errmsg, "cannot open z-file \"%s\"", zfile); |
377 |
error(SYSTEM, errmsg); |
378 |
} |
379 |
#ifdef MSDOS |
380 |
setmode(zfd, O_BINARY); |
381 |
#endif |
382 |
for (i = 0; i <= psample; i++) { |
383 |
zbar[i] = (float *)malloc(hres*sizeof(float)); |
384 |
if (zbar[i] == NULL) |
385 |
goto memerr; |
386 |
} |
387 |
} else { |
388 |
zfd = -1; |
389 |
for (i = 0; i <= psample; i++) |
390 |
zbar[i] = NULL; |
391 |
} |
392 |
/* write out boundaries */ |
393 |
fprtresolu(hres, vres, stdout); |
394 |
/* recover file and compute first */ |
395 |
i = salvage(oldfile); |
396 |
if (zfd != -1 && i > 0 && |
397 |
lseek(zfd, (long)i*hres*sizeof(float), 0) == -1) |
398 |
error(SYSTEM, "z-file seek error in render"); |
399 |
pctdone = 100.0*i/vres; |
400 |
if (ralrm > 0) /* report init stats */ |
401 |
report(); |
402 |
#ifndef BSD |
403 |
else |
404 |
#endif |
405 |
signal(SIGCONT, report); |
406 |
ypos = vres-1 - i; |
407 |
fillscanline(scanbar[0], zbar[0], sampdens, hres, ypos, hstep); |
408 |
/* compute scanlines */ |
409 |
for (ypos -= ystep; ypos > -ystep; ypos -= ystep) { |
410 |
/* bottom adjust? */ |
411 |
if (ypos < 0) { |
412 |
ystep += ypos; |
413 |
ypos = 0; |
414 |
} |
415 |
colptr = scanbar[ystep]; /* move base to top */ |
416 |
scanbar[ystep] = scanbar[0]; |
417 |
scanbar[0] = colptr; |
418 |
zptr = zbar[ystep]; |
419 |
zbar[ystep] = zbar[0]; |
420 |
zbar[0] = zptr; |
421 |
/* fill base line */ |
422 |
fillscanline(scanbar[0], zbar[0], sampdens, |
423 |
hres, ypos, hstep); |
424 |
/* fill bar */ |
425 |
fillscanbar(scanbar, zbar, hres, ypos, ystep); |
426 |
/* write it out */ |
427 |
#ifndef BSD |
428 |
signal(SIGCONT, SIG_IGN); /* don't interrupt writes */ |
429 |
#endif |
430 |
for (i = ystep; i > 0; i--) { |
431 |
if (zfd != -1 && write(zfd, (char *)zbar[i], |
432 |
hres*sizeof(float)) |
433 |
< hres*sizeof(float)) |
434 |
goto writerr; |
435 |
if (fwritescan(scanbar[i], hres, stdout) < 0) |
436 |
goto writerr; |
437 |
} |
438 |
if (fflush(stdout) == EOF) |
439 |
goto writerr; |
440 |
/* record progress */ |
441 |
pctdone = 100.0*(vres-1-ypos)/vres; |
442 |
if (ralrm > 0 && time((time_t *)NULL) >= tlastrept+ralrm) |
443 |
report(); |
444 |
#ifndef BSD |
445 |
else |
446 |
signal(SIGCONT, report); |
447 |
#endif |
448 |
} |
449 |
/* clean up */ |
450 |
signal(SIGCONT, SIG_IGN); |
451 |
if (zfd != -1) { |
452 |
if (write(zfd, (char *)zbar[0], hres*sizeof(float)) |
453 |
< hres*sizeof(float)) |
454 |
goto writerr; |
455 |
if (close(zfd) == -1) |
456 |
goto writerr; |
457 |
for (i = 0; i <= psample; i++) |
458 |
free((char *)zbar[i]); |
459 |
} |
460 |
fwritescan(scanbar[0], hres, stdout); |
461 |
if (fflush(stdout) == EOF) |
462 |
goto writerr; |
463 |
for (i = 0; i <= psample; i++) |
464 |
free((char *)scanbar[i]); |
465 |
if (sampdens != NULL) |
466 |
free(sampdens); |
467 |
pctdone = 100.0; |
468 |
if (ralrm > 0) |
469 |
report(); |
470 |
signal(SIGCONT, SIG_DFL); |
471 |
return; |
472 |
writerr: |
473 |
error(SYSTEM, "write error in render"); |
474 |
memerr: |
475 |
error(SYSTEM, "out of memory in render"); |
476 |
} |
477 |
|
478 |
|
479 |
fillscanline(scanline, zline, sd, xres, y, xstep) /* fill scan at y */ |
480 |
register COLOR *scanline; |
481 |
register float *zline; |
482 |
register char *sd; |
483 |
int xres, y, xstep; |
484 |
{ |
485 |
static int nc = 0; /* number of calls */ |
486 |
int bl = xstep, b = xstep; |
487 |
double z; |
488 |
register int i; |
489 |
|
490 |
z = pixvalue(scanline[0], 0, y); |
491 |
if (zline) zline[0] = z; |
492 |
/* zig-zag start for quincunx pattern */ |
493 |
for (i = ++nc & 1 ? xstep : xstep/2; i < xres-1+xstep; i += xstep) { |
494 |
if (i >= xres) { |
495 |
xstep += xres-1-i; |
496 |
i = xres-1; |
497 |
} |
498 |
z = pixvalue(scanline[i], i, y); |
499 |
if (zline) zline[i] = z; |
500 |
if (sd) b = sd[0] > sd[1] ? sd[0] : sd[1]; |
501 |
if (i <= xstep) |
502 |
b = fillsample(scanline, zline, 0, y, i, 0, b/2); |
503 |
else |
504 |
b = fillsample(scanline+i-xstep, |
505 |
zline ? zline+i-xstep : (float *)NULL, |
506 |
i-xstep, y, xstep, 0, b/2); |
507 |
if (sd) *sd++ = nc & 1 ? bl : b; |
508 |
bl = b; |
509 |
} |
510 |
if (sd && nc & 1) *sd = bl; |
511 |
} |
512 |
|
513 |
|
514 |
fillscanbar(scanbar, zbar, xres, y, ysize) /* fill interior */ |
515 |
register COLOR *scanbar[]; |
516 |
register float *zbar[]; |
517 |
int xres, y, ysize; |
518 |
{ |
519 |
COLOR vline[MAXDIV+1]; |
520 |
float zline[MAXDIV+1]; |
521 |
int b = ysize; |
522 |
register int i, j; |
523 |
|
524 |
for (i = 0; i < xres; i++) { |
525 |
|
526 |
copycolor(vline[0], scanbar[0][i]); |
527 |
copycolor(vline[ysize], scanbar[ysize][i]); |
528 |
if (zbar[0]) { |
529 |
zline[0] = zbar[0][i]; |
530 |
zline[ysize] = zbar[ysize][i]; |
531 |
} |
532 |
|
533 |
b = fillsample(vline, zbar[0] ? zline : (float *)NULL, |
534 |
i, y, 0, ysize, b/2); |
535 |
|
536 |
for (j = 1; j < ysize; j++) |
537 |
copycolor(scanbar[j][i], vline[j]); |
538 |
if (zbar[0]) |
539 |
for (j = 1; j < ysize; j++) |
540 |
zbar[j][i] = zline[j]; |
541 |
} |
542 |
} |
543 |
|
544 |
|
545 |
int |
546 |
fillsample(colline, zline, x, y, xlen, ylen, b) /* fill interior points */ |
547 |
register COLOR *colline; |
548 |
register float *zline; |
549 |
int x, y; |
550 |
int xlen, ylen; |
551 |
int b; |
552 |
{ |
553 |
double ratio; |
554 |
double z; |
555 |
COLOR ctmp; |
556 |
int ncut; |
557 |
register int len; |
558 |
|
559 |
if (xlen > 0) /* x or y length is zero */ |
560 |
len = xlen; |
561 |
else |
562 |
len = ylen; |
563 |
|
564 |
if (len <= 1) /* limit recursion */ |
565 |
return(0); |
566 |
|
567 |
if (b > 0 |
568 |
|| (zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
569 |
|| bigdiff(colline[0], colline[len], maxdiff)) { |
570 |
|
571 |
z = pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
572 |
if (zline) zline[len>>1] = z; |
573 |
ncut = 1; |
574 |
|
575 |
} else { /* interpolate */ |
576 |
|
577 |
copycolor(colline[len>>1], colline[len]); |
578 |
ratio = (double)(len>>1) / len; |
579 |
scalecolor(colline[len>>1], ratio); |
580 |
if (zline) zline[len>>1] = zline[len] * ratio; |
581 |
ratio = 1.0 - ratio; |
582 |
copycolor(ctmp, colline[0]); |
583 |
scalecolor(ctmp, ratio); |
584 |
addcolor(colline[len>>1], ctmp); |
585 |
if (zline) zline[len>>1] += zline[0] * ratio; |
586 |
ncut = 0; |
587 |
} |
588 |
/* recurse */ |
589 |
ncut += fillsample(colline, zline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
590 |
|
591 |
ncut += fillsample(colline+(len>>1), |
592 |
zline ? zline+(len>>1) : (float *)NULL, |
593 |
x+(xlen>>1), y+(ylen>>1), |
594 |
xlen-(xlen>>1), ylen-(ylen>>1), b/2); |
595 |
|
596 |
return(ncut); |
597 |
} |
598 |
|
599 |
|
600 |
double |
601 |
pixvalue(col, x, y) /* compute pixel value */ |
602 |
COLOR col; /* returned color */ |
603 |
int x, y; /* pixel position */ |
604 |
{ |
605 |
static RAY thisray; |
606 |
|
607 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview, |
608 |
(x+pixjitter())/hres, (y+pixjitter())/vres)) < -FTINY) { |
609 |
setcolor(col, 0.0, 0.0, 0.0); |
610 |
return(0.0); |
611 |
} |
612 |
|
613 |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
614 |
|
615 |
samplendx = pixnumber(x,y,hres,vres); /* set pixel index */ |
616 |
|
617 |
rayvalue(&thisray); /* trace ray */ |
618 |
|
619 |
copycolor(col, thisray.rcol); /* return color */ |
620 |
|
621 |
return(thisray.rt); /* return distance */ |
622 |
} |
623 |
|
624 |
|
625 |
int |
626 |
salvage(oldfile) /* salvage scanlines from killed program */ |
627 |
char *oldfile; |
628 |
{ |
629 |
COLR *scanline; |
630 |
FILE *fp; |
631 |
int x, y; |
632 |
|
633 |
if (oldfile == NULL) |
634 |
goto gotzip; |
635 |
|
636 |
if ((fp = fopen(oldfile, "r")) == NULL) { |
637 |
sprintf(errmsg, "cannot open recover file \"%s\"", oldfile); |
638 |
error(WARNING, errmsg); |
639 |
goto gotzip; |
640 |
} |
641 |
#ifdef MSDOS |
642 |
setmode(fileno(fp), O_BINARY); |
643 |
#endif |
644 |
/* discard header */ |
645 |
getheader(fp, NULL, NULL); |
646 |
/* get picture size */ |
647 |
if (!fscnresolu(&x, &y, fp)) { |
648 |
sprintf(errmsg, "bad recover file \"%s\" - not removed", |
649 |
oldfile); |
650 |
error(WARNING, errmsg); |
651 |
fclose(fp); |
652 |
goto gotzip; |
653 |
} |
654 |
|
655 |
if (x != hres || y != vres) { |
656 |
sprintf(errmsg, "resolution mismatch in recover file \"%s\"", |
657 |
oldfile); |
658 |
error(USER, errmsg); |
659 |
} |
660 |
|
661 |
scanline = (COLR *)malloc(hres*sizeof(COLR)); |
662 |
if (scanline == NULL) |
663 |
error(SYSTEM, "out of memory in salvage"); |
664 |
for (y = 0; y < vres; y++) { |
665 |
if (freadcolrs(scanline, hres, fp) < 0) |
666 |
break; |
667 |
if (fwritecolrs(scanline, hres, stdout) < 0) |
668 |
goto writerr; |
669 |
} |
670 |
if (fflush(stdout) == EOF) |
671 |
goto writerr; |
672 |
free((char *)scanline); |
673 |
fclose(fp); |
674 |
unlink(oldfile); |
675 |
return(y); |
676 |
gotzip: |
677 |
if (fflush(stdout) == EOF) |
678 |
error(SYSTEM, "error writing picture header"); |
679 |
return(0); |
680 |
writerr: |
681 |
sprintf(errmsg, "write error during recovery of \"%s\"", oldfile); |
682 |
error(SYSTEM, errmsg); |
683 |
} |
684 |
|
685 |
|
686 |
int |
687 |
pixnumber(x, y, xres, yres) /* compute pixel index (brushed) */ |
688 |
register int x, y; |
689 |
int xres, yres; |
690 |
{ |
691 |
x -= y; |
692 |
while (x < 0) |
693 |
x += xres; |
694 |
return((((x>>2)*yres + y) << 2) + (x & 3)); |
695 |
} |