1 |
greg |
2.1 |
#ifndef lint |
2 |
greg |
2.2 |
static const char RCSid[] = "$Id: rcode_norm.c,v 2.1 2019/07/19 02:18:44 greg Exp $"; |
3 |
greg |
2.1 |
#endif |
4 |
|
|
/* |
5 |
|
|
* Encode and decode surface normal map using 32-bit integers |
6 |
|
|
*/ |
7 |
|
|
|
8 |
|
|
#include "copyright.h" |
9 |
|
|
|
10 |
|
|
#include <stdlib.h> |
11 |
|
|
#include "platform.h" |
12 |
|
|
#include "rtio.h" |
13 |
|
|
#include "rtmath.h" |
14 |
|
|
#include "normcodec.h" |
15 |
|
|
|
16 |
|
|
char *progname; /* set in main() */ |
17 |
|
|
|
18 |
|
|
|
19 |
|
|
/* Report usage error and exit */ |
20 |
|
|
static void |
21 |
|
|
usage_exit(int code) |
22 |
|
|
{ |
23 |
|
|
fputs("Usage: ", stderr); |
24 |
|
|
fputs(progname, stderr); |
25 |
greg |
2.2 |
fputs(" [-h[io]][-H[io]][-f[afd]] [input [output.nrm]]\n", stderr); |
26 |
greg |
2.1 |
fputs(" Or: ", stderr); |
27 |
|
|
fputs(progname, stderr); |
28 |
greg |
2.2 |
fputs(" -r [-i][-u][-h[io]][-H[io]][-f[afd]] [input.nrm [output]]\n", |
29 |
greg |
2.1 |
stderr); |
30 |
|
|
exit(code); |
31 |
|
|
} |
32 |
|
|
|
33 |
|
|
|
34 |
|
|
/* Encode normals from input stream */ |
35 |
|
|
static int |
36 |
|
|
encode_normals(NORMCODEC *ncp) |
37 |
|
|
{ |
38 |
|
|
long nexpected = (long)ncp->res.xr * ncp->res.yr; |
39 |
|
|
|
40 |
|
|
if (ncp->inpfmt[0]) { |
41 |
|
|
if (strcasestr(ncp->inpfmt, "ascii") != NULL) |
42 |
|
|
ncp->format = 'a'; |
43 |
|
|
else if (strcasestr(ncp->inpfmt, "float") != NULL) |
44 |
|
|
ncp->format = 'f'; |
45 |
|
|
else if (strcasestr(ncp->inpfmt, "double") != NULL) |
46 |
|
|
ncp->format = 'd'; |
47 |
|
|
else { |
48 |
|
|
fputs(ncp->inpname, stderr); |
49 |
|
|
fputs(": unsupported input format: ", stderr); |
50 |
|
|
fputs(ncp->inpfmt, stderr); |
51 |
|
|
fputc('\n', stderr); |
52 |
|
|
return 0; |
53 |
|
|
} |
54 |
|
|
} |
55 |
|
|
|
56 |
|
|
do { |
57 |
|
|
int ok = 0; |
58 |
|
|
FVECT nrm; |
59 |
|
|
|
60 |
|
|
switch (ncp->format) { |
61 |
|
|
case 'a': |
62 |
|
|
ok = (fscanf(ncp->finp, FVFORMAT, |
63 |
|
|
&nrm[0], &nrm[1], &nrm[2]) == 3); |
64 |
|
|
break; |
65 |
|
|
#ifdef SMLFLT |
66 |
|
|
case 'f': |
67 |
|
|
ok = (getbinary(nrm, sizeof(*nrm), 3, ncp->finp) == 3); |
68 |
|
|
break; |
69 |
|
|
case 'd': { |
70 |
|
|
double nrmd[3]; |
71 |
|
|
ok = (getbinary(nrmd, sizeof(*nrmd), |
72 |
|
|
3, ncp->finp) == 3); |
73 |
|
|
if (ok) VCOPY(nrm, nrmd); |
74 |
|
|
} |
75 |
|
|
break; |
76 |
|
|
#else |
77 |
|
|
case 'f': { |
78 |
|
|
float nrmf[3]; |
79 |
|
|
ok = (getbinary(nrmf, sizeof(*nrmf), |
80 |
|
|
3, ncp->finp) == 3); |
81 |
|
|
if (ok) VCOPY(nrm, nrmf); |
82 |
|
|
} |
83 |
|
|
break; |
84 |
|
|
case 'd': |
85 |
|
|
ok = (getbinary(nrm, sizeof(*nrm), 3, ncp->finp) == 3); |
86 |
|
|
break; |
87 |
|
|
#endif |
88 |
|
|
} |
89 |
|
|
if (!ok) |
90 |
|
|
break; |
91 |
|
|
|
92 |
|
|
normalize(nrm); |
93 |
|
|
putint(encodedir(nrm), 4, stdout); |
94 |
|
|
|
95 |
|
|
} while (--nexpected); |
96 |
|
|
|
97 |
|
|
if (nexpected > 0) { |
98 |
|
|
fputs(ncp->inpname, stderr); |
99 |
|
|
fputs(": fewer normals than expected\n", stderr); |
100 |
|
|
return 0; |
101 |
|
|
} |
102 |
|
|
return 1; |
103 |
|
|
} |
104 |
|
|
|
105 |
|
|
|
106 |
|
|
/* Output the given normal to stdout */ |
107 |
|
|
static void |
108 |
|
|
output_normal(NORMCODEC *ncp, FVECT nrm) |
109 |
|
|
{ |
110 |
|
|
switch (ncp->format) { |
111 |
|
|
case 'a': |
112 |
|
|
printf("%.9f %.9f %.9f\n", nrm[0], nrm[1], nrm[2]); |
113 |
|
|
break; |
114 |
|
|
#ifdef SMLFLT |
115 |
|
|
case 'f': |
116 |
|
|
putbinary(nrm, sizeof(*nrm), 3, stdout); |
117 |
|
|
break; |
118 |
|
|
case 'd': { |
119 |
|
|
double nrmd[3]; |
120 |
|
|
VCOPY(nrmd, nrm); |
121 |
|
|
putbinary(nrmd, sizeof(*nrmd), 3, stdout); |
122 |
|
|
} |
123 |
|
|
break; |
124 |
|
|
#else |
125 |
|
|
case 'f': { |
126 |
|
|
float nrmf[3]; |
127 |
|
|
VCOPY(nrmf, nrm); |
128 |
|
|
putbinary(nrmf, sizeof(*nrmf), 3, stdout); |
129 |
|
|
} |
130 |
|
|
break; |
131 |
|
|
case 'd': |
132 |
|
|
putbinary(nrm, sizeof(*nrm), 3, stdout); |
133 |
|
|
break; |
134 |
|
|
#endif |
135 |
|
|
} |
136 |
|
|
} |
137 |
|
|
|
138 |
|
|
|
139 |
|
|
/* Decode normals from input stream */ |
140 |
|
|
static int |
141 |
|
|
decode_normals(NORMCODEC *ncp) |
142 |
|
|
{ |
143 |
|
|
long nexpected = (long)ncp->res.xr * ncp->res.yr; |
144 |
|
|
|
145 |
|
|
if (!check_decode_normals(ncp)) |
146 |
|
|
return 0; |
147 |
|
|
|
148 |
|
|
do { |
149 |
|
|
FVECT nrm; |
150 |
|
|
|
151 |
|
|
if (decode_normal_next(nrm, ncp) < 0) |
152 |
|
|
break; |
153 |
|
|
|
154 |
|
|
output_normal(ncp, nrm); |
155 |
|
|
|
156 |
|
|
} while (--nexpected); |
157 |
|
|
|
158 |
|
|
if (nexpected > 0) { |
159 |
|
|
fputs(ncp->inpname, stderr); |
160 |
|
|
fputs(": unexpected EOF\n", stderr); |
161 |
|
|
return 0; |
162 |
|
|
} |
163 |
|
|
return 1; |
164 |
|
|
} |
165 |
|
|
|
166 |
|
|
|
167 |
|
|
/* Decode normals at particular pixels given on standard input */ |
168 |
|
|
static int |
169 |
|
|
pixel_normals(NORMCODEC *ncp, int unbuf) |
170 |
|
|
{ |
171 |
|
|
int x, y; |
172 |
|
|
FVECT nrm; |
173 |
|
|
|
174 |
|
|
if (ncp->finp == stdin) { |
175 |
|
|
fputs(progname, stderr); |
176 |
|
|
fputs(": <stdin> used for encoded normals\n", stderr); |
177 |
|
|
return 0; |
178 |
|
|
} |
179 |
|
|
if (!check_decode_normals(ncp)) |
180 |
|
|
return 0; |
181 |
|
|
if (ncp->res.rt != PIXSTANDARD) { |
182 |
|
|
fputs(progname, stderr); |
183 |
|
|
fputs(": can only handle standard pixel ordering\n", stderr); |
184 |
|
|
return 0; |
185 |
|
|
} |
186 |
|
|
while (scanf("%d %d", &x, &y) == 2) { |
187 |
|
|
|
188 |
|
|
y = ncp->res.yr-1 - y; |
189 |
|
|
|
190 |
|
|
if (decode_normal_pix(nrm, ncp, x, y) < 0) |
191 |
|
|
return 0; |
192 |
|
|
|
193 |
|
|
output_normal(ncp, nrm); |
194 |
|
|
|
195 |
|
|
if (unbuf && fflush(stdout) == EOF) { |
196 |
|
|
fputs(progname, stderr); |
197 |
|
|
fputs(": write error on output\n", stderr); |
198 |
|
|
return 0; |
199 |
|
|
} |
200 |
|
|
} |
201 |
|
|
if (!feof(stdin)) { |
202 |
|
|
fputs(progname, stderr); |
203 |
|
|
fputs(": non-integer as pixel index\n", stderr); |
204 |
|
|
return 0; |
205 |
|
|
} |
206 |
|
|
return 1; |
207 |
|
|
} |
208 |
|
|
|
209 |
|
|
|
210 |
|
|
int |
211 |
|
|
main(int argc, char *argv[]) |
212 |
|
|
{ |
213 |
|
|
int reverse = 0; |
214 |
|
|
int bypixel = 0; |
215 |
|
|
int unbuffered = 0; |
216 |
|
|
NORMCODEC nc; |
217 |
|
|
int a; |
218 |
|
|
|
219 |
|
|
progname = argv[0]; |
220 |
|
|
set_nc_defaults(&nc); |
221 |
|
|
nc.hdrflags = HF_ALL; |
222 |
|
|
for (a = 1; a < argc && argv[a][0] == '-'; a++) |
223 |
|
|
switch (argv[a][1]) { |
224 |
|
|
case 'r': |
225 |
|
|
reverse++; |
226 |
|
|
break; |
227 |
|
|
case 'f': |
228 |
|
|
switch (argv[a][2]) { |
229 |
|
|
case 'f': |
230 |
|
|
case 'd': |
231 |
|
|
case 'a': |
232 |
|
|
nc.format = argv[a][2]; |
233 |
|
|
break; |
234 |
|
|
default: |
235 |
|
|
fputs(progname, stderr); |
236 |
|
|
fputs(": unsupported -f? format\n", stderr); |
237 |
|
|
usage_exit(1); |
238 |
|
|
} |
239 |
|
|
break; |
240 |
|
|
case 'h': |
241 |
|
|
switch (argv[a][2]) { |
242 |
|
|
case '\0': |
243 |
|
|
nc.hdrflags &= ~(HF_HEADIN|HF_HEADOUT); |
244 |
|
|
break; |
245 |
|
|
case 'i': |
246 |
|
|
case 'I': |
247 |
|
|
nc.hdrflags &= ~HF_HEADIN; |
248 |
|
|
break; |
249 |
|
|
case 'o': |
250 |
|
|
case 'O': |
251 |
|
|
nc.hdrflags &= ~HF_HEADOUT; |
252 |
|
|
break; |
253 |
|
|
default: |
254 |
|
|
usage_exit(1); |
255 |
|
|
} |
256 |
|
|
break; |
257 |
|
|
case 'H': |
258 |
|
|
switch (argv[a][2]) { |
259 |
|
|
case '\0': |
260 |
|
|
nc.hdrflags &= ~(HF_RESIN|HF_RESOUT); |
261 |
|
|
break; |
262 |
|
|
case 'i': |
263 |
|
|
case 'I': |
264 |
|
|
nc.hdrflags &= ~HF_RESIN; |
265 |
|
|
break; |
266 |
|
|
case 'o': |
267 |
|
|
case 'O': |
268 |
|
|
nc.hdrflags &= ~HF_RESOUT; |
269 |
|
|
break; |
270 |
|
|
default: |
271 |
|
|
usage_exit(1); |
272 |
|
|
} |
273 |
|
|
break; |
274 |
|
|
case 'i': |
275 |
|
|
bypixel++; |
276 |
|
|
break; |
277 |
|
|
case 'u': |
278 |
|
|
unbuffered++; |
279 |
|
|
break; |
280 |
|
|
default: |
281 |
|
|
usage_exit(1); |
282 |
|
|
} |
283 |
|
|
nc.hdrflags |= !reverse * HF_ENCODE; |
284 |
|
|
|
285 |
|
|
if ((nc.hdrflags & (HF_RESIN|HF_RESOUT)) == HF_RESOUT) { |
286 |
|
|
fputs(progname, stderr); |
287 |
|
|
fputs(": unknown resolution for output\n", stderr); |
288 |
|
|
return 1; |
289 |
|
|
} |
290 |
|
|
if (bypixel) { |
291 |
|
|
if (!reverse) { |
292 |
|
|
fputs(progname, stderr); |
293 |
|
|
fputs(": -i only supported with -r option\n", |
294 |
|
|
stderr); |
295 |
|
|
usage_exit(1); |
296 |
|
|
} |
297 |
|
|
if (a >= argc) { |
298 |
|
|
fputs(progname, stderr); |
299 |
|
|
fputs(": -i option requires input file\n", stderr); |
300 |
|
|
usage_exit(1); |
301 |
|
|
} |
302 |
|
|
if (!(nc.hdrflags & HF_RESIN)) { |
303 |
|
|
fputs(progname, stderr); |
304 |
|
|
fputs(": -i option requires input resolution\n", stderr); |
305 |
|
|
usage_exit(1); |
306 |
|
|
} |
307 |
greg |
2.2 |
nc.hdrflags &= ~HF_RESOUT; |
308 |
greg |
2.1 |
} |
309 |
|
|
if (a < argc-2) { |
310 |
|
|
fputs(progname, stderr); |
311 |
|
|
fputs(": too many file arguments\n", stderr); |
312 |
|
|
usage_exit(1); |
313 |
|
|
} |
314 |
|
|
if (a < argc && !(nc.finp = fopen(nc.inpname=argv[a], "r"))) { |
315 |
|
|
fputs(nc.inpname, stderr); |
316 |
|
|
fputs(": cannot open for reading\n", stderr); |
317 |
|
|
return 1; |
318 |
|
|
} |
319 |
|
|
if (a+1 < argc && !freopen(argv[a+1], "w", stdout)) { |
320 |
|
|
fputs(argv[a+1], stderr); |
321 |
|
|
fputs(": cannot open for writing\n", stderr); |
322 |
|
|
return 1; |
323 |
|
|
} |
324 |
|
|
SET_FILE_BINARY(nc.finp); |
325 |
|
|
if (reverse || nc.format != 'a') |
326 |
|
|
SET_FILE_BINARY(stdout); |
327 |
|
|
#ifdef getc_unlocked /* avoid stupid semaphores */ |
328 |
|
|
flockfile(nc.finp); |
329 |
|
|
flockfile(stdout); |
330 |
|
|
#endif |
331 |
|
|
/* read/copy header */ |
332 |
|
|
if (!process_nc_header(&nc, a, argv)) |
333 |
|
|
return 1; |
334 |
|
|
/* process data */ |
335 |
|
|
if (!reverse) { |
336 |
|
|
if (!encode_normals(&nc)) |
337 |
|
|
return 1; |
338 |
|
|
} else if (bypixel) { |
339 |
|
|
if (!pixel_normals(&nc, unbuffered)) |
340 |
|
|
return 1; |
341 |
|
|
} else if (!decode_normals(&nc)) |
342 |
|
|
return 1; |
343 |
|
|
|
344 |
|
|
if (fflush(stdout) == EOF) { |
345 |
|
|
fputs(progname, stderr); |
346 |
|
|
fputs(": error writing output\n", stderr); |
347 |
|
|
return 1; |
348 |
|
|
} |
349 |
|
|
return 0; |
350 |
|
|
} |