1 |
greg |
2.8 |
/* Copyright (c) 1992 Regents of the University of California */ |
2 |
greg |
1.1 |
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3 |
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#ifndef lint |
4 |
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static char SCCSid[] = "$SunId$ LBL"; |
5 |
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#endif |
6 |
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7 |
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/* |
8 |
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* rpict.c - routines and variables for picture generation. |
9 |
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* |
10 |
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* 8/14/85 |
11 |
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*/ |
12 |
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13 |
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#include "ray.h" |
14 |
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15 |
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#ifdef BSD |
16 |
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#include <sys/time.h> |
17 |
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#include <sys/resource.h> |
18 |
greg |
1.34 |
#endif |
19 |
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20 |
greg |
1.14 |
#include <signal.h> |
21 |
greg |
1.1 |
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22 |
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#include "view.h" |
23 |
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24 |
greg |
1.36 |
#include "resolu.h" |
25 |
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26 |
greg |
1.1 |
#include "random.h" |
27 |
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28 |
greg |
2.12 |
#include "paths.h" |
29 |
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30 |
greg |
2.21 |
#define RFTEMPLATE "rfXXXXXX" |
31 |
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32 |
greg |
2.22 |
#ifndef SIGCONT |
33 |
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#define SIGCONT SIGIO |
34 |
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#endif |
35 |
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36 |
greg |
1.25 |
int dimlist[MAXDIM]; /* sampling dimensions */ |
37 |
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int ndims = 0; /* number of sampling dimensions */ |
38 |
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int samplendx; /* sample index number */ |
39 |
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40 |
greg |
1.12 |
VIEW ourview = STDVIEW; /* view parameters */ |
41 |
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int hresolu = 512; /* horizontal resolution */ |
42 |
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int vresolu = 512; /* vertical resolution */ |
43 |
greg |
2.14 |
double pixaspect = 1.0; /* pixel aspect ratio */ |
44 |
greg |
1.1 |
|
45 |
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int psample = 4; /* pixel sample size */ |
46 |
greg |
2.14 |
double maxdiff = .05; /* max. difference for interpolation */ |
47 |
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double dstrpix = 0.67; /* square pixel distribution */ |
48 |
greg |
1.1 |
|
49 |
greg |
2.14 |
double dstrsrc = 0.0; /* square source distribution */ |
50 |
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double shadthresh = .05; /* shadow threshold */ |
51 |
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double shadcert = .5; /* shadow certainty */ |
52 |
greg |
1.35 |
int directrelay = 1; /* number of source relays */ |
53 |
greg |
1.29 |
int vspretest = 512; /* virtual source pretest density */ |
54 |
greg |
2.20 |
int directvis = 1; /* sources visible? */ |
55 |
greg |
2.14 |
double srcsizerat = .25; /* maximum ratio source size/dist. */ |
56 |
greg |
1.1 |
|
57 |
greg |
2.14 |
double specthresh = .15; /* specular sampling threshold */ |
58 |
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double specjitter = 1.; /* specular sampling jitter */ |
59 |
greg |
2.5 |
|
60 |
greg |
1.1 |
int maxdepth = 6; /* maximum recursion depth */ |
61 |
greg |
2.14 |
double minweight = 5e-3; /* minimum ray weight */ |
62 |
greg |
1.1 |
|
63 |
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COLOR ambval = BLKCOLOR; /* ambient value */ |
64 |
greg |
2.14 |
double ambacc = 0.2; /* ambient accuracy */ |
65 |
greg |
1.6 |
int ambres = 32; /* ambient resolution */ |
66 |
greg |
1.1 |
int ambdiv = 128; /* ambient divisions */ |
67 |
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int ambssamp = 0; /* ambient super-samples */ |
68 |
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int ambounce = 0; /* ambient bounces */ |
69 |
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char *amblist[128]; /* ambient include/exclude list */ |
70 |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
71 |
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72 |
greg |
2.16 |
#ifdef MSDOS |
73 |
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int ralrm = 60; /* seconds between reports */ |
74 |
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#else |
75 |
greg |
1.1 |
int ralrm = 0; /* seconds between reports */ |
76 |
greg |
2.16 |
#endif |
77 |
greg |
1.1 |
|
78 |
greg |
2.14 |
double pctdone = 0.0; /* percentage done */ |
79 |
greg |
1.1 |
|
80 |
greg |
1.24 |
long tlastrept = 0L; /* time at last report */ |
81 |
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82 |
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extern long time(); |
83 |
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extern long tstart; /* starting time */ |
84 |
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85 |
greg |
2.24 |
extern unsigned long nrays; /* number of rays traced */ |
86 |
greg |
1.1 |
|
87 |
greg |
2.14 |
#define MAXDIV 16 /* maximum sample size */ |
88 |
greg |
1.1 |
|
89 |
greg |
2.14 |
#define pixjitter() (.5+dstrpix*(.5-frandom())) |
90 |
greg |
1.1 |
|
91 |
greg |
2.8 |
static int hres, vres; /* resolution for this frame */ |
92 |
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93 |
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extern char *mktemp(); |
94 |
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95 |
greg |
2.14 |
double pixvalue(); |
96 |
greg |
1.1 |
|
97 |
greg |
1.11 |
|
98 |
greg |
1.1 |
quit(code) /* quit program */ |
99 |
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int code; |
100 |
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{ |
101 |
greg |
2.8 |
if (code) /* report status */ |
102 |
greg |
1.1 |
report(); |
103 |
greg |
2.21 |
headclean(); /* delete header file */ |
104 |
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pfclean(); /* clean up persist files */ |
105 |
greg |
1.1 |
exit(code); |
106 |
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} |
107 |
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108 |
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109 |
greg |
1.24 |
#ifdef BSD |
110 |
greg |
1.1 |
report() /* report progress */ |
111 |
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{ |
112 |
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struct rusage rubuf; |
113 |
greg |
2.14 |
double t; |
114 |
greg |
1.1 |
|
115 |
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getrusage(RUSAGE_SELF, &rubuf); |
116 |
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t = (rubuf.ru_utime.tv_usec + rubuf.ru_stime.tv_usec) / 1e6; |
117 |
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t += rubuf.ru_utime.tv_sec + rubuf.ru_stime.tv_sec; |
118 |
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getrusage(RUSAGE_CHILDREN, &rubuf); |
119 |
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t += (rubuf.ru_utime.tv_usec + rubuf.ru_stime.tv_usec) / 1e6; |
120 |
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t += rubuf.ru_utime.tv_sec + rubuf.ru_stime.tv_sec; |
121 |
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122 |
greg |
2.24 |
sprintf(errmsg, "%lu rays, %4.2f%% done after %5.4f CPU hours\n", |
123 |
greg |
1.1 |
nrays, pctdone, t/3600.0); |
124 |
greg |
1.24 |
eputs(errmsg); |
125 |
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tlastrept = time((long *)0); |
126 |
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} |
127 |
greg |
1.1 |
#else |
128 |
greg |
1.24 |
report() /* report progress */ |
129 |
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{ |
130 |
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tlastrept = time((long *)0); |
131 |
greg |
2.24 |
sprintf(errmsg, "%lu rays, %4.2f%% done after %5.4f hours\n", |
132 |
greg |
1.24 |
nrays, pctdone, (tlastrept-tstart)/3600.0); |
133 |
greg |
1.1 |
eputs(errmsg); |
134 |
greg |
2.22 |
signal(SIGCONT, report); |
135 |
greg |
1.1 |
} |
136 |
greg |
1.24 |
#endif |
137 |
greg |
1.1 |
|
138 |
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139 |
greg |
2.8 |
rpict(seq, pout, zout, prvr) /* generate image(s) */ |
140 |
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int seq; |
141 |
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char *pout, *zout, *prvr; |
142 |
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/* |
143 |
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* If seq is greater than zero, then we will render a sequence of |
144 |
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* images based on view parameter strings read from the standard input. |
145 |
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* If pout is NULL, then all images will be sent to the standard ouput. |
146 |
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* If seq is greater than zero and prvr is an integer, then it is the |
147 |
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* frame number at which rendering should begin. Preceeding view parameter |
148 |
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* strings will be skipped in the input. |
149 |
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* If pout and prvr are the same, prvr is renamed to avoid overwriting. |
150 |
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* Note that pout and zout should contain %d format specifications for |
151 |
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* sequenced file naming. |
152 |
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*/ |
153 |
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{ |
154 |
greg |
2.21 |
extern char *rindex(), *strncpy(), *strcat(), *strcpy(); |
155 |
greg |
2.9 |
char fbuf[128], fbuf2[128]; |
156 |
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register char *cp; |
157 |
greg |
2.14 |
RESOLU rs; |
158 |
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double pa; |
159 |
greg |
2.8 |
/* check sampling */ |
160 |
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if (psample < 1) |
161 |
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psample = 1; |
162 |
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else if (psample > MAXDIV) { |
163 |
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sprintf(errmsg, "pixel sampling reduced from %d to %d", |
164 |
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psample, MAXDIV); |
165 |
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error(WARNING, errmsg); |
166 |
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psample = MAXDIV; |
167 |
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} |
168 |
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/* get starting frame */ |
169 |
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if (seq <= 0) |
170 |
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seq = 0; |
171 |
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else if (prvr != NULL && isint(prvr)) { |
172 |
greg |
2.9 |
register int rn; /* skip to specified view */ |
173 |
greg |
2.8 |
if ((rn = atoi(prvr)) < seq) |
174 |
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error(USER, "recover frame less than start frame"); |
175 |
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if (pout == NULL) |
176 |
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error(USER, "missing output file specification"); |
177 |
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for ( ; seq < rn; seq++) |
178 |
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if (nextview(stdin) == EOF) |
179 |
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error(USER, "unexpected EOF on view input"); |
180 |
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prvr = fbuf; /* mark for renaming */ |
181 |
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} |
182 |
greg |
2.18 |
if (pout != NULL & prvr != NULL) { |
183 |
greg |
2.8 |
sprintf(fbuf, pout, seq); |
184 |
greg |
2.18 |
if (!strcmp(prvr, fbuf)) { /* rename */ |
185 |
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strcpy(fbuf2, fbuf); |
186 |
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for (cp = fbuf2; *cp; cp++) |
187 |
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; |
188 |
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while (cp > fbuf2 && !ISDIRSEP(cp[-1])) |
189 |
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cp--; |
190 |
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strcpy(cp, RFTEMPLATE); |
191 |
greg |
2.8 |
prvr = mktemp(fbuf2); |
192 |
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if (rename(fbuf, prvr) < 0 && errno != ENOENT) { |
193 |
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sprintf(errmsg, |
194 |
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"cannot rename \"%s\" to \"%s\"", |
195 |
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fbuf, prvr); |
196 |
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error(SYSTEM, errmsg); |
197 |
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} |
198 |
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} |
199 |
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} |
200 |
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/* render sequence */ |
201 |
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do { |
202 |
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if (seq && nextview(stdin) == EOF) |
203 |
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break; |
204 |
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if (pout != NULL) { |
205 |
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sprintf(fbuf, pout, seq); |
206 |
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if (freopen(fbuf, "w", stdout) == NULL) { |
207 |
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sprintf(errmsg, |
208 |
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"cannot open output file \"%s\"", fbuf); |
209 |
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error(SYSTEM, errmsg); |
210 |
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} |
211 |
greg |
2.17 |
#ifdef MSDOS |
212 |
|
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setmode(fileno(stdout), O_BINARY); |
213 |
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#endif |
214 |
greg |
2.8 |
dupheader(); |
215 |
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} |
216 |
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hres = hresolu; vres = vresolu; pa = pixaspect; |
217 |
|
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if (prvr != NULL) |
218 |
|
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if (viewfile(prvr, &ourview, &rs) <= 0 |
219 |
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|| rs.or != PIXSTANDARD) { |
220 |
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sprintf(errmsg, |
221 |
|
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"cannot recover view parameters from \"%s\"", prvr); |
222 |
|
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error(WARNING, errmsg); |
223 |
|
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} else { |
224 |
|
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pa = 0.0; |
225 |
|
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hres = scanlen(&rs); |
226 |
|
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vres = numscans(&rs); |
227 |
|
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} |
228 |
greg |
2.9 |
if ((cp = setview(&ourview)) != NULL) |
229 |
|
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error(USER, cp); |
230 |
greg |
2.8 |
normaspect(viewaspect(&ourview), &pa, &hres, &vres); |
231 |
|
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if (seq) { |
232 |
|
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if (ralrm > 0) { |
233 |
greg |
2.11 |
fprintf(stderr, "FRAME %d:", seq); |
234 |
|
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fprintview(&ourview, stderr); |
235 |
|
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putc('\n', stderr); |
236 |
|
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fflush(stderr); |
237 |
greg |
2.8 |
} |
238 |
|
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printf("FRAME=%d\n", seq); |
239 |
|
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} |
240 |
|
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fputs(VIEWSTR, stdout); |
241 |
|
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fprintview(&ourview, stdout); |
242 |
|
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putchar('\n'); |
243 |
|
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if (pa < .99 || pa > 1.01) |
244 |
|
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fputaspect(pa, stdout); |
245 |
|
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fputformat(COLRFMT, stdout); |
246 |
|
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putchar('\n'); |
247 |
|
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if (zout != NULL) |
248 |
greg |
2.9 |
sprintf(cp=fbuf, zout, seq); |
249 |
greg |
2.8 |
else |
250 |
greg |
2.9 |
cp = NULL; |
251 |
|
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render(cp, prvr); |
252 |
greg |
2.8 |
prvr = NULL; |
253 |
|
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} while (seq++); |
254 |
|
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} |
255 |
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|
256 |
|
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|
257 |
|
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nextview(fp) /* get next view from fp */ |
258 |
|
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FILE *fp; |
259 |
|
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{ |
260 |
greg |
2.9 |
char linebuf[256]; |
261 |
greg |
2.8 |
|
262 |
|
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while (fgets(linebuf, sizeof(linebuf), fp) != NULL) |
263 |
greg |
2.9 |
if (isview(linebuf) && sscanview(&ourview, linebuf) > 0) |
264 |
greg |
2.8 |
return(0); |
265 |
|
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return(EOF); |
266 |
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} |
267 |
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|
268 |
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|
269 |
greg |
1.11 |
render(zfile, oldfile) /* render the scene */ |
270 |
|
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char *zfile, *oldfile; |
271 |
greg |
1.1 |
{ |
272 |
greg |
1.16 |
extern long lseek(); |
273 |
greg |
1.1 |
COLOR *scanbar[MAXDIV+1]; /* scanline arrays of pixel values */ |
274 |
greg |
1.11 |
float *zbar[MAXDIV+1]; /* z values */ |
275 |
greg |
2.2 |
char *sampdens; /* previous sample density */ |
276 |
greg |
1.1 |
int ypos; /* current scanline */ |
277 |
greg |
1.15 |
int ystep; /* current y step size */ |
278 |
greg |
1.33 |
int hstep; /* h step size */ |
279 |
greg |
1.16 |
int zfd; |
280 |
greg |
1.1 |
COLOR *colptr; |
281 |
greg |
1.11 |
float *zptr; |
282 |
greg |
1.1 |
register int i; |
283 |
greg |
1.9 |
/* allocate scanlines */ |
284 |
greg |
1.1 |
for (i = 0; i <= psample; i++) { |
285 |
greg |
2.8 |
scanbar[i] = (COLOR *)malloc(hres*sizeof(COLOR)); |
286 |
greg |
1.1 |
if (scanbar[i] == NULL) |
287 |
greg |
1.11 |
goto memerr; |
288 |
greg |
1.1 |
} |
289 |
greg |
2.2 |
hstep = (psample*140+49)/99; /* quincunx sampling */ |
290 |
|
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ystep = (psample*99+70)/140; |
291 |
|
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if (hstep > 2) { |
292 |
greg |
2.8 |
i = hres/hstep + 2; |
293 |
greg |
2.2 |
if ((sampdens = malloc(i)) == NULL) |
294 |
|
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goto memerr; |
295 |
|
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while (i--) |
296 |
|
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sampdens[i] = hstep; |
297 |
|
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} else |
298 |
|
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sampdens = NULL; |
299 |
greg |
1.11 |
/* open z file */ |
300 |
|
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if (zfile != NULL) { |
301 |
greg |
1.16 |
if ((zfd = open(zfile, O_WRONLY|O_CREAT, 0666)) == -1) { |
302 |
greg |
1.11 |
sprintf(errmsg, "cannot open z file \"%s\"", zfile); |
303 |
|
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error(SYSTEM, errmsg); |
304 |
|
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} |
305 |
greg |
2.17 |
#ifdef MSDOS |
306 |
|
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setmode(zfd, O_BINARY); |
307 |
|
|
#endif |
308 |
greg |
1.11 |
for (i = 0; i <= psample; i++) { |
309 |
greg |
2.8 |
zbar[i] = (float *)malloc(hres*sizeof(float)); |
310 |
greg |
1.11 |
if (zbar[i] == NULL) |
311 |
|
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goto memerr; |
312 |
|
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} |
313 |
|
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} else { |
314 |
greg |
1.16 |
zfd = -1; |
315 |
greg |
1.11 |
for (i = 0; i <= psample; i++) |
316 |
|
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zbar[i] = NULL; |
317 |
|
|
} |
318 |
greg |
1.1 |
/* write out boundaries */ |
319 |
greg |
2.8 |
fprtresolu(hres, vres, stdout); |
320 |
greg |
1.10 |
/* recover file and compute first */ |
321 |
greg |
1.11 |
i = salvage(oldfile); |
322 |
greg |
1.23 |
if (zfd != -1 && i > 0 && |
323 |
greg |
2.8 |
lseek(zfd, (long)i*hres*sizeof(float), 0) == -1) |
324 |
greg |
1.11 |
error(SYSTEM, "z file seek error in render"); |
325 |
greg |
2.8 |
pctdone = 100.0*i/vres; |
326 |
greg |
1.24 |
if (ralrm > 0) /* report init stats */ |
327 |
|
|
report(); |
328 |
greg |
2.14 |
#ifndef BSD |
329 |
greg |
1.32 |
else |
330 |
|
|
#endif |
331 |
greg |
2.22 |
signal(SIGCONT, report); |
332 |
greg |
2.8 |
ypos = vres-1 - i; |
333 |
|
|
fillscanline(scanbar[0], zbar[0], sampdens, hres, ypos, hstep); |
334 |
greg |
1.10 |
/* compute scanlines */ |
335 |
greg |
1.15 |
for (ypos -= ystep; ypos > -ystep; ypos -= ystep) { |
336 |
|
|
/* bottom adjust? */ |
337 |
|
|
if (ypos < 0) { |
338 |
|
|
ystep += ypos; |
339 |
|
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ypos = 0; |
340 |
|
|
} |
341 |
|
|
colptr = scanbar[ystep]; /* move base to top */ |
342 |
|
|
scanbar[ystep] = scanbar[0]; |
343 |
greg |
1.1 |
scanbar[0] = colptr; |
344 |
greg |
1.15 |
zptr = zbar[ystep]; |
345 |
|
|
zbar[ystep] = zbar[0]; |
346 |
greg |
1.11 |
zbar[0] = zptr; |
347 |
greg |
1.10 |
/* fill base line */ |
348 |
greg |
2.2 |
fillscanline(scanbar[0], zbar[0], sampdens, |
349 |
greg |
2.8 |
hres, ypos, hstep); |
350 |
greg |
1.10 |
/* fill bar */ |
351 |
greg |
2.8 |
fillscanbar(scanbar, zbar, hres, ypos, ystep); |
352 |
greg |
1.10 |
/* write it out */ |
353 |
greg |
2.14 |
#ifndef BSD |
354 |
greg |
2.22 |
signal(SIGCONT, SIG_IGN); /* don't interrupt writes */ |
355 |
greg |
1.32 |
#endif |
356 |
greg |
1.15 |
for (i = ystep; i > 0; i--) { |
357 |
greg |
1.17 |
if (zfd != -1 && write(zfd, (char *)zbar[i], |
358 |
greg |
2.8 |
hres*sizeof(float)) |
359 |
|
|
< hres*sizeof(float)) |
360 |
greg |
1.1 |
goto writerr; |
361 |
greg |
2.8 |
if (fwritescan(scanbar[i], hres, stdout) < 0) |
362 |
greg |
1.11 |
goto writerr; |
363 |
|
|
} |
364 |
greg |
1.1 |
if (fflush(stdout) == EOF) |
365 |
|
|
goto writerr; |
366 |
greg |
1.24 |
/* record progress */ |
367 |
greg |
2.8 |
pctdone = 100.0*(vres-1-ypos)/vres; |
368 |
greg |
1.24 |
if (ralrm > 0 && time((long *)0) >= tlastrept+ralrm) |
369 |
|
|
report(); |
370 |
greg |
2.14 |
#ifndef BSD |
371 |
greg |
1.32 |
else |
372 |
greg |
2.22 |
signal(SIGCONT, report); |
373 |
greg |
1.32 |
#endif |
374 |
greg |
1.1 |
} |
375 |
greg |
1.11 |
/* clean up */ |
376 |
greg |
2.22 |
signal(SIGCONT, SIG_IGN); |
377 |
greg |
1.16 |
if (zfd != -1) { |
378 |
greg |
2.8 |
if (write(zfd, (char *)zbar[0], hres*sizeof(float)) |
379 |
|
|
< hres*sizeof(float)) |
380 |
greg |
1.11 |
goto writerr; |
381 |
greg |
1.20 |
if (close(zfd) == -1) |
382 |
|
|
goto writerr; |
383 |
greg |
1.11 |
for (i = 0; i <= psample; i++) |
384 |
|
|
free((char *)zbar[i]); |
385 |
|
|
} |
386 |
greg |
2.8 |
fwritescan(scanbar[0], hres, stdout); |
387 |
greg |
1.10 |
if (fflush(stdout) == EOF) |
388 |
|
|
goto writerr; |
389 |
greg |
1.1 |
for (i = 0; i <= psample; i++) |
390 |
|
|
free((char *)scanbar[i]); |
391 |
greg |
2.2 |
if (sampdens != NULL) |
392 |
|
|
free(sampdens); |
393 |
greg |
1.11 |
pctdone = 100.0; |
394 |
greg |
2.13 |
if (ralrm > 0) |
395 |
|
|
report(); |
396 |
greg |
2.23 |
signal(SIGCONT, SIG_DFL); |
397 |
greg |
1.1 |
return; |
398 |
|
|
writerr: |
399 |
|
|
error(SYSTEM, "write error in render"); |
400 |
greg |
1.11 |
memerr: |
401 |
|
|
error(SYSTEM, "out of memory in render"); |
402 |
greg |
1.1 |
} |
403 |
|
|
|
404 |
|
|
|
405 |
greg |
2.2 |
fillscanline(scanline, zline, sd, xres, y, xstep) /* fill scan at y */ |
406 |
greg |
2.14 |
register COLOR *scanline; |
407 |
|
|
register float *zline; |
408 |
greg |
2.2 |
register char *sd; |
409 |
greg |
1.9 |
int xres, y, xstep; |
410 |
greg |
1.1 |
{ |
411 |
greg |
1.33 |
static int nc = 0; /* number of calls */ |
412 |
greg |
2.2 |
int bl = xstep, b = xstep; |
413 |
greg |
2.14 |
double z; |
414 |
greg |
1.1 |
register int i; |
415 |
|
|
|
416 |
greg |
1.11 |
z = pixvalue(scanline[0], 0, y); |
417 |
|
|
if (zline) zline[0] = z; |
418 |
greg |
1.33 |
/* zig-zag start for quincunx pattern */ |
419 |
greg |
2.2 |
for (i = ++nc & 1 ? xstep : xstep/2; i < xres-1+xstep; i += xstep) { |
420 |
greg |
1.15 |
if (i >= xres) { |
421 |
|
|
xstep += xres-1-i; |
422 |
|
|
i = xres-1; |
423 |
|
|
} |
424 |
greg |
1.11 |
z = pixvalue(scanline[i], i, y); |
425 |
|
|
if (zline) zline[i] = z; |
426 |
greg |
2.2 |
if (sd) b = sd[0] > sd[1] ? sd[0] : sd[1]; |
427 |
greg |
2.3 |
if (i <= xstep) |
428 |
|
|
b = fillsample(scanline, zline, 0, y, i, 0, b/2); |
429 |
|
|
else |
430 |
|
|
b = fillsample(scanline+i-xstep, |
431 |
|
|
zline ? zline+i-xstep : NULL, |
432 |
|
|
i-xstep, y, xstep, 0, b/2); |
433 |
greg |
2.2 |
if (sd) *sd++ = nc & 1 ? bl : b; |
434 |
|
|
bl = b; |
435 |
greg |
1.1 |
} |
436 |
greg |
2.2 |
if (sd && nc & 1) *sd = bl; |
437 |
greg |
1.1 |
} |
438 |
|
|
|
439 |
|
|
|
440 |
greg |
1.11 |
fillscanbar(scanbar, zbar, xres, y, ysize) /* fill interior */ |
441 |
greg |
2.14 |
register COLOR *scanbar[]; |
442 |
|
|
register float *zbar[]; |
443 |
greg |
1.9 |
int xres, y, ysize; |
444 |
greg |
1.1 |
{ |
445 |
|
|
COLOR vline[MAXDIV+1]; |
446 |
greg |
1.11 |
float zline[MAXDIV+1]; |
447 |
greg |
1.1 |
int b = ysize; |
448 |
|
|
register int i, j; |
449 |
|
|
|
450 |
greg |
1.8 |
for (i = 0; i < xres; i++) { |
451 |
greg |
1.1 |
|
452 |
|
|
copycolor(vline[0], scanbar[0][i]); |
453 |
|
|
copycolor(vline[ysize], scanbar[ysize][i]); |
454 |
greg |
1.11 |
if (zbar[0]) { |
455 |
|
|
zline[0] = zbar[0][i]; |
456 |
|
|
zline[ysize] = zbar[ysize][i]; |
457 |
|
|
} |
458 |
greg |
1.1 |
|
459 |
greg |
1.11 |
b = fillsample(vline, zbar[0] ? zline : NULL, |
460 |
|
|
i, y, 0, ysize, b/2); |
461 |
greg |
1.1 |
|
462 |
|
|
for (j = 1; j < ysize; j++) |
463 |
|
|
copycolor(scanbar[j][i], vline[j]); |
464 |
greg |
1.11 |
if (zbar[0]) |
465 |
|
|
for (j = 1; j < ysize; j++) |
466 |
|
|
zbar[j][i] = zline[j]; |
467 |
greg |
1.1 |
} |
468 |
|
|
} |
469 |
|
|
|
470 |
|
|
|
471 |
|
|
int |
472 |
greg |
2.14 |
fillsample(colline, zline, x, y, xlen, ylen, b) /* fill interior points */ |
473 |
|
|
register COLOR *colline; |
474 |
|
|
register float *zline; |
475 |
greg |
1.1 |
int x, y; |
476 |
|
|
int xlen, ylen; |
477 |
|
|
int b; |
478 |
|
|
{ |
479 |
greg |
2.14 |
double ratio; |
480 |
|
|
double z; |
481 |
greg |
1.1 |
COLOR ctmp; |
482 |
|
|
int ncut; |
483 |
|
|
register int len; |
484 |
|
|
|
485 |
|
|
if (xlen > 0) /* x or y length is zero */ |
486 |
|
|
len = xlen; |
487 |
|
|
else |
488 |
|
|
len = ylen; |
489 |
|
|
|
490 |
|
|
if (len <= 1) /* limit recursion */ |
491 |
|
|
return(0); |
492 |
|
|
|
493 |
greg |
1.11 |
if (b > 0 |
494 |
|
|
|| (zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
495 |
|
|
|| bigdiff(colline[0], colline[len], maxdiff)) { |
496 |
greg |
1.1 |
|
497 |
greg |
1.11 |
z = pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
498 |
|
|
if (zline) zline[len>>1] = z; |
499 |
greg |
1.1 |
ncut = 1; |
500 |
|
|
|
501 |
|
|
} else { /* interpolate */ |
502 |
|
|
|
503 |
|
|
copycolor(colline[len>>1], colline[len]); |
504 |
|
|
ratio = (double)(len>>1) / len; |
505 |
|
|
scalecolor(colline[len>>1], ratio); |
506 |
greg |
1.11 |
if (zline) zline[len>>1] = zline[len] * ratio; |
507 |
|
|
ratio = 1.0 - ratio; |
508 |
greg |
1.1 |
copycolor(ctmp, colline[0]); |
509 |
|
|
scalecolor(ctmp, ratio); |
510 |
|
|
addcolor(colline[len>>1], ctmp); |
511 |
greg |
1.11 |
if (zline) zline[len>>1] += zline[0] * ratio; |
512 |
greg |
1.1 |
ncut = 0; |
513 |
|
|
} |
514 |
|
|
/* recurse */ |
515 |
greg |
1.11 |
ncut += fillsample(colline, zline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
516 |
greg |
1.1 |
|
517 |
greg |
1.11 |
ncut += fillsample(colline+(len>>1), zline ? zline+(len>>1) : NULL, |
518 |
|
|
x+(xlen>>1), y+(ylen>>1), |
519 |
|
|
xlen-(xlen>>1), ylen-(ylen>>1), b/2); |
520 |
greg |
1.1 |
|
521 |
|
|
return(ncut); |
522 |
|
|
} |
523 |
|
|
|
524 |
|
|
|
525 |
greg |
1.11 |
double |
526 |
greg |
1.1 |
pixvalue(col, x, y) /* compute pixel value */ |
527 |
|
|
COLOR col; /* returned color */ |
528 |
|
|
int x, y; /* pixel position */ |
529 |
|
|
{ |
530 |
greg |
1.25 |
static RAY thisray; |
531 |
greg |
1.1 |
|
532 |
greg |
1.22 |
if (viewray(thisray.rorg, thisray.rdir, &ourview, |
533 |
greg |
2.8 |
(x+pixjitter())/hres, (y+pixjitter())/vres) < 0) { |
534 |
greg |
1.22 |
setcolor(col, 0.0, 0.0, 0.0); |
535 |
|
|
return(0.0); |
536 |
|
|
} |
537 |
greg |
1.1 |
|
538 |
|
|
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
539 |
greg |
1.25 |
|
540 |
greg |
2.8 |
samplendx = pixnumber(x,y,hres,vres); /* set pixel index */ |
541 |
greg |
1.25 |
|
542 |
greg |
1.1 |
rayvalue(&thisray); /* trace ray */ |
543 |
|
|
|
544 |
|
|
copycolor(col, thisray.rcol); /* return color */ |
545 |
greg |
1.11 |
|
546 |
greg |
1.20 |
return(thisray.rt); /* return distance */ |
547 |
greg |
1.1 |
} |
548 |
|
|
|
549 |
|
|
|
550 |
|
|
int |
551 |
|
|
salvage(oldfile) /* salvage scanlines from killed program */ |
552 |
|
|
char *oldfile; |
553 |
|
|
{ |
554 |
|
|
COLR *scanline; |
555 |
|
|
FILE *fp; |
556 |
|
|
int x, y; |
557 |
|
|
|
558 |
|
|
if (oldfile == NULL) |
559 |
|
|
return(0); |
560 |
greg |
1.9 |
|
561 |
|
|
if ((fp = fopen(oldfile, "r")) == NULL) { |
562 |
greg |
1.1 |
sprintf(errmsg, "cannot open recover file \"%s\"", oldfile); |
563 |
|
|
error(WARNING, errmsg); |
564 |
|
|
return(0); |
565 |
|
|
} |
566 |
greg |
2.17 |
#ifdef MSDOS |
567 |
|
|
setmode(fileno(fp), O_BINARY); |
568 |
|
|
#endif |
569 |
greg |
1.1 |
/* discard header */ |
570 |
greg |
2.19 |
getheader(fp, NULL, NULL); |
571 |
greg |
1.1 |
/* get picture size */ |
572 |
greg |
1.36 |
if (!fscnresolu(&x, &y, fp)) { |
573 |
greg |
1.2 |
sprintf(errmsg, "bad recover file \"%s\"", oldfile); |
574 |
|
|
error(WARNING, errmsg); |
575 |
greg |
1.1 |
fclose(fp); |
576 |
|
|
return(0); |
577 |
|
|
} |
578 |
|
|
|
579 |
greg |
2.8 |
if (x != hres || y != vres) { |
580 |
greg |
1.1 |
sprintf(errmsg, "resolution mismatch in recover file \"%s\"", |
581 |
|
|
oldfile); |
582 |
|
|
error(USER, errmsg); |
583 |
|
|
} |
584 |
|
|
|
585 |
greg |
2.8 |
scanline = (COLR *)malloc(hres*sizeof(COLR)); |
586 |
greg |
1.1 |
if (scanline == NULL) |
587 |
|
|
error(SYSTEM, "out of memory in salvage"); |
588 |
greg |
2.8 |
for (y = 0; y < vres; y++) { |
589 |
|
|
if (freadcolrs(scanline, hres, fp) < 0) |
590 |
greg |
1.1 |
break; |
591 |
greg |
2.8 |
if (fwritecolrs(scanline, hres, stdout) < 0) |
592 |
greg |
1.1 |
goto writerr; |
593 |
|
|
} |
594 |
|
|
if (fflush(stdout) == EOF) |
595 |
|
|
goto writerr; |
596 |
|
|
free((char *)scanline); |
597 |
|
|
fclose(fp); |
598 |
|
|
unlink(oldfile); |
599 |
|
|
return(y); |
600 |
|
|
writerr: |
601 |
greg |
2.9 |
sprintf(errmsg, "write error during recovery of \"%s\"", oldfile); |
602 |
|
|
error(SYSTEM, errmsg); |
603 |
greg |
1.31 |
} |
604 |
|
|
|
605 |
|
|
|
606 |
|
|
int |
607 |
|
|
pixnumber(x, y, xres, yres) /* compute pixel index (brushed) */ |
608 |
|
|
register int x, y; |
609 |
|
|
int xres, yres; |
610 |
|
|
{ |
611 |
|
|
x -= y; |
612 |
|
|
while (x < 0) |
613 |
|
|
x += xres; |
614 |
|
|
return((((x>>2)*yres + y) << 2) + (x & 3)); |
615 |
greg |
1.1 |
} |