| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: rcrop.c,v 1.16 2024/05/17 20:50:57 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* rcrop.c - crop a Radiance picture or matrix data |
| 6 |
*/ |
| 7 |
|
| 8 |
#include <ctype.h> |
| 9 |
#include "rtio.h" |
| 10 |
#include "platform.h" |
| 11 |
#include "color.h" |
| 12 |
#include "fvect.h" |
| 13 |
#include "view.h" |
| 14 |
|
| 15 |
char *progname; /* global argv[0] */ |
| 16 |
|
| 17 |
VIEW vw = STDVIEW; |
| 18 |
int gotvw = 0; |
| 19 |
char fmt[MAXFMTLEN] = "ascii"; /* assumed when unspecified */ |
| 20 |
int ncomp = 0; |
| 21 |
RESOLU res; |
| 22 |
int rmin, cmin, nrows, ncols; |
| 23 |
|
| 24 |
/* Process header line, copying to stdout when appropriate */ |
| 25 |
static int |
| 26 |
headline(char *s, void *p) |
| 27 |
{ |
| 28 |
if (formatval(fmt, s)) |
| 29 |
return(0); |
| 30 |
if (isncomp(s)) { |
| 31 |
ncomp = ncompval(s); |
| 32 |
return(-(ncomp <= 0)); |
| 33 |
} |
| 34 |
if (!strncmp(s, "NROWS=", 6)) { |
| 35 |
res.rt = PIXSTANDARD; |
| 36 |
res.yr = atoi(s+6); |
| 37 |
return(-(res.yr <= 0)); |
| 38 |
} |
| 39 |
if (!strncmp(s, "NCOLS=", 6)) { |
| 40 |
res.rt = PIXSTANDARD; |
| 41 |
res.xr = atoi(s+6); |
| 42 |
return(-(res.xr <= 0)); |
| 43 |
} |
| 44 |
if (isview(s)) { |
| 45 |
gotvw += sscanview(&vw, s); |
| 46 |
return(0); |
| 47 |
} |
| 48 |
fputs(s, stdout); /* copy other header info. */ |
| 49 |
return(0); |
| 50 |
} |
| 51 |
|
| 52 |
/* Copy routine for COLR data */ |
| 53 |
static int |
| 54 |
colr_copyf(FILE *fp) |
| 55 |
{ |
| 56 |
const int width = scanlen(&res); |
| 57 |
COLR *scan = (COLR *)malloc(sizeof(COLR)*width); |
| 58 |
int y; |
| 59 |
|
| 60 |
if (!scan) { |
| 61 |
fputs(progname, stderr); |
| 62 |
fputs(": out of memory!\n", stderr); |
| 63 |
return(0); |
| 64 |
} |
| 65 |
for (y = 0; y < rmin; y++) /* initial skip */ |
| 66 |
if (freadcolrs(scan, width, fp) < 0) |
| 67 |
goto readerr; |
| 68 |
/* scanlines to copy */ |
| 69 |
for (y = 0; y < nrows; y++) { |
| 70 |
if (freadcolrs(scan, width, fp) < 0) |
| 71 |
goto readerr; |
| 72 |
if (fwritecolrs(scan+cmin, ncols, stdout) < 0) |
| 73 |
goto writerr; |
| 74 |
} |
| 75 |
free(scan); |
| 76 |
if (fflush(stdout) == 0) |
| 77 |
return(1); |
| 78 |
writerr: |
| 79 |
fputs(progname, stderr); |
| 80 |
fputs(": error writing picture\n", stderr); |
| 81 |
return(0); |
| 82 |
readerr: |
| 83 |
fputs(progname, stderr); |
| 84 |
fputs(": error reading picture\n", stderr); |
| 85 |
return(0); |
| 86 |
} |
| 87 |
|
| 88 |
/* Copy routine for binary data (asize = sizeof(type)) */ |
| 89 |
static int |
| 90 |
binary_copyf(FILE *fp, int asize) |
| 91 |
{ |
| 92 |
const int skip_thresh = 8192; |
| 93 |
const size_t elsiz = asize*ncomp; |
| 94 |
const int width = scanlen(&res); |
| 95 |
const long skip_len = (width-ncols)*elsiz; |
| 96 |
char *buf; |
| 97 |
int y; |
| 98 |
/* check if fseek() useful */ |
| 99 |
if (skip_len > skip_thresh && |
| 100 |
fseek(fp, ((long)rmin*width + cmin)*elsiz, SEEK_CUR) == 0) { |
| 101 |
int fd; |
| 102 |
off_t curpos; |
| 103 |
buf = (char *)malloc(ncols*elsiz); |
| 104 |
if (!buf) |
| 105 |
goto memerr; |
| 106 |
#ifdef NON_POSIX |
| 107 |
for (y = nrows; y-- > 0; ) { |
| 108 |
if (getbinary(buf, elsiz, ncols, fp) != ncols) |
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goto readerr; |
| 110 |
if (putbinary(buf, elsiz, ncols, stdout) != ncols) |
| 111 |
goto writerr; |
| 112 |
if (y && fseek(fp, skip_len, SEEK_CUR) < 0) { |
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fputs(progname, stderr); |
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fputs(": unexpected seek error on input\n", stderr); |
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return(0); |
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} |
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} |
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#else |
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fd = fileno(fp); |
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curpos = ftello(fp); |
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for (y = nrows; y-- > 0; curpos += width*elsiz) { |
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if (pread(fd, buf, ncols*elsiz, |
| 123 |
curpos) != ncols*elsiz) |
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goto readerr; |
| 125 |
if (putbinary(buf, elsiz, ncols, stdout) != ncols) |
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goto writerr; |
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} |
| 128 |
#endif |
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free(buf); |
| 130 |
if (fflush(stdout) == EOF) |
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goto writerr; |
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return(1); /* success! */ |
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} /* else need to read it all... */ |
| 134 |
buf = (char *)malloc(width*elsiz); |
| 135 |
if (!buf) |
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goto memerr; |
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/* skip rows as requested */ |
| 138 |
if (skip_len > skip_thresh || |
| 139 |
(rmin && fseek(fp, (long)rmin*width*elsiz, SEEK_CUR) < 0)) |
| 140 |
for (y = 0; y < rmin; y++) |
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if (getbinary(buf, elsiz, width, fp) != width) |
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goto readerr; |
| 143 |
for (y = 0; y < nrows; y++) { /* copy portion */ |
| 144 |
if (getbinary(buf, elsiz, width, fp) != width) |
| 145 |
goto readerr; |
| 146 |
if (putbinary(buf+cmin*elsiz, elsiz, ncols, stdout) != ncols) |
| 147 |
goto writerr; |
| 148 |
} |
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free(buf); /* we're done */ |
| 150 |
if (fflush(stdout) == 0) |
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return(1); |
| 152 |
writerr: |
| 153 |
fputs(progname, stderr); |
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fputs(": error writing binary data\n", stderr); |
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return(0); |
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readerr: |
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fputs(progname, stderr); |
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fputs(": error reading binary data\n", stderr); |
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return(0); |
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memerr: |
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fputs(progname, stderr); |
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fputs(": out of memory!\n", stderr); |
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return(0); |
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} |
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|
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/* Read (and copy) specified number of white-space-separated words */ |
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static int |
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readwords(FILE *finp, long nwords, FILE *fout) |
| 169 |
{ |
| 170 |
while (nwords-- > 0) { |
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int c; |
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do { |
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c = getc(finp); |
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} while (isspace(c)); |
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if (c == EOF) |
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return(-1); |
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if (fout && fputc(' ', fout) == EOF) |
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return(-1); |
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do { |
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if (fout) |
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putc(c, fout); |
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} while ((c = getc(finp)) != EOF && !isspace(c)); |
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} |
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return(0); |
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} |
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|
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/* Copy routine for ascii data */ |
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static int |
| 189 |
ascii_copyf(FILE *fp) |
| 190 |
{ |
| 191 |
const int width = scanlen(&res); |
| 192 |
int x, y; |
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|
| 194 |
SET_FILE_TEXT(fp); /* started as binary */ |
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SET_FILE_TEXT(stdout); |
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/* skip rows as requested */ |
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if (readwords(fp, (long)rmin*width*ncomp, NULL) < 0) |
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goto io_err; |
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for (y = 0; y < nrows; y++) { /* copy part */ |
| 200 |
if (readwords(fp, cmin*ncomp, NULL) < 0) |
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goto io_err; |
| 202 |
if (readwords(fp, ncols*ncomp, stdout) < 0) |
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goto io_err; |
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fputc('\n', stdout); /* newline per row */ |
| 205 |
if (readwords(fp, (width-ncols-cmin)*ncomp, NULL) < 0) |
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goto io_err; |
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} |
| 208 |
if (fflush(stdout) == 0) |
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return(1); |
| 210 |
io_err: |
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fputs(progname, stderr); |
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fputs(": error copying ascii data\n", stderr); |
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return(0); |
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} |
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|
| 216 |
/* Adjust (crop) our view */ |
| 217 |
static int |
| 218 |
adjust_view(void) |
| 219 |
{ |
| 220 |
double p0[2], p1[2]; |
| 221 |
const char *err; |
| 222 |
|
| 223 |
if (res.rt & YMAJOR) { |
| 224 |
p0[0] = cmin/(double)res.xr; |
| 225 |
p0[1] = rmin/(double)res.yr; |
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p1[0] = (cmin+ncols)/(double)res.xr; |
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p1[1] = (rmin+nrows)/(double)res.yr; |
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} else { |
| 229 |
p0[0] = rmin/(double)res.xr; |
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p0[1] = cmin/(double)res.yr; |
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p1[0] = (rmin+nrows)/(double)res.xr; |
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p1[1] = (cmin+ncols)/(double)res.yr; |
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} |
| 234 |
if (res.rt & XDECR) { |
| 235 |
p0[0] = 1. - p0[0]; |
| 236 |
p1[0] = 1. - p1[0]; |
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} |
| 238 |
if (res.rt & YDECR) { |
| 239 |
p0[1] = 1. - p0[1]; |
| 240 |
p1[1] = 1. - p1[1]; |
| 241 |
} |
| 242 |
err = cropview(&vw, p0[0], p0[1], p1[0], p1[1]); |
| 243 |
|
| 244 |
if (!err) |
| 245 |
return(1); /* success! */ |
| 246 |
|
| 247 |
fputs(progname, stderr); |
| 248 |
fputs(": view error - ", stderr); |
| 249 |
fputs(err, stderr); |
| 250 |
fputc('\n', stderr); |
| 251 |
return(0); /* something went wrong */ |
| 252 |
} |
| 253 |
|
| 254 |
|
| 255 |
/* Main routine -- load header and call processor */ |
| 256 |
int |
| 257 |
main(int argc, char *argv[]) |
| 258 |
{ |
| 259 |
FILE *fp = stdin; |
| 260 |
int asiz = 0; |
| 261 |
int gotdims; |
| 262 |
|
| 263 |
progname = argv[0]; |
| 264 |
/* get input and output */ |
| 265 |
if ((argc < 5) | (argc > 7)) |
| 266 |
goto usage; |
| 267 |
if (!isint(argv[1]) | !isint(argv[2]) | |
| 268 |
!isint(argv[3]) | !isint(argv[4])) |
| 269 |
goto usage; |
| 270 |
rmin = atoi(argv[1]); |
| 271 |
cmin = atoi(argv[2]); |
| 272 |
nrows = atoi(argv[3]); |
| 273 |
ncols = atoi(argv[4]); |
| 274 |
if ((rmin < 0) | (cmin < 0)) |
| 275 |
goto usage; |
| 276 |
if (argc <= 5) |
| 277 |
SET_FILE_BINARY(fp); |
| 278 |
else if (!(fp = fopen(argv[5], "rb"))) { |
| 279 |
fputs(argv[5], stderr); |
| 280 |
fputs(": cannot open for reading\n", stderr); |
| 281 |
return(1); |
| 282 |
} |
| 283 |
if (argc <= 6) |
| 284 |
SET_FILE_BINARY(stdout); |
| 285 |
else if (!freopen(argv[6], "wb", stdout)) { |
| 286 |
fputs(argv[6], stderr); |
| 287 |
fputs(": cannot open for writing\n", stderr); |
| 288 |
return(1); |
| 289 |
} |
| 290 |
#ifdef getc_unlocked /* avoid stupid semaphores */ |
| 291 |
flockfile(fp); |
| 292 |
flockfile(stdout); |
| 293 |
#endif |
| 294 |
/* process information header */ |
| 295 |
if (getheader(fp, headline, NULL) < 0) { |
| 296 |
fputs(progname, stderr); |
| 297 |
fputs(": bad input header\n", stderr); |
| 298 |
return(1); |
| 299 |
} |
| 300 |
gotdims = (res.rt == PIXSTANDARD) & (res.xr > 0) & (res.yr > 0); |
| 301 |
if (!gotdims && !fgetsresolu(&res, fp)) { |
| 302 |
fputs(progname, stderr); |
| 303 |
fputs(": missing input dimensions\n", stderr); |
| 304 |
return(1); |
| 305 |
} |
| 306 |
if (nrows <= 0 ) |
| 307 |
nrows += numscans(&res) - rmin; |
| 308 |
if (ncols <= 0) |
| 309 |
ncols += scanlen(&res) - cmin; |
| 310 |
if ((nrows <= 0) | (ncols <= 0) | |
| 311 |
(rmin+nrows > numscans(&res)) | |
| 312 |
(cmin+ncols > scanlen(&res))) { |
| 313 |
fputs(progname, stderr); |
| 314 |
fputs(": illegal crop\n", stderr); |
| 315 |
return(1); |
| 316 |
} |
| 317 |
printargs(5, argv, stdout); /* add to header */ |
| 318 |
if (gotvw && adjust_view()) { |
| 319 |
fputs(VIEWSTR, stdout); /* write adjusted view */ |
| 320 |
fprintview(&vw, stdout); |
| 321 |
fputc('\n', stdout); |
| 322 |
} |
| 323 |
if (gotdims) /* dimensions + format */ |
| 324 |
printf("NROWS=%d\nNCOLS=%d\n", nrows, ncols); |
| 325 |
if (ncomp) |
| 326 |
fputncomp(ncomp, stdout); |
| 327 |
fputformat(fmt, stdout); /* will align bytes if it can */ |
| 328 |
fputc('\n', stdout); /* end of new header */ |
| 329 |
if (!gotdims) { /* add resolution string? */ |
| 330 |
RESOLU newres; |
| 331 |
if (res.rt & YMAJOR) { |
| 332 |
newres.xr = ncols; |
| 333 |
newres.yr = nrows; |
| 334 |
} else { |
| 335 |
newres.xr = nrows; |
| 336 |
newres.yr = ncols; |
| 337 |
} |
| 338 |
newres.rt = res.rt; |
| 339 |
fputsresolu(&newres, stdout); |
| 340 |
} |
| 341 |
/* call appropriate processor */ |
| 342 |
if (!strcmp(fmt, "float")) { |
| 343 |
asiz = sizeof(float); |
| 344 |
} else if (!strcmp(fmt, "double")) { |
| 345 |
asiz = sizeof(double); |
| 346 |
} else if (!strcmp(fmt, "32-bit_encoded_normal")) { |
| 347 |
asiz = 4; |
| 348 |
ncomp = 1; |
| 349 |
} else if (!strcmp(fmt, "16-bit_encoded_depth")) { |
| 350 |
asiz = 2; |
| 351 |
ncomp = 1; |
| 352 |
} else if (globmatch(PICFMT, fmt)) { |
| 353 |
asiz = -1; |
| 354 |
if (!ncomp) ncomp = 3; |
| 355 |
else ncomp *= (ncomp == 3); |
| 356 |
} else if (!strcmp(fmt, SPECFMT)) { |
| 357 |
asiz = ncomp+1; |
| 358 |
ncomp = 1; /* XXX assumes uncompressed */ |
| 359 |
} else if (strcasecmp(fmt, "ascii")) { |
| 360 |
fputs(progname, stderr); |
| 361 |
fputs(": unsupported format - ", stderr); |
| 362 |
fputs(fmt, stderr); |
| 363 |
fputc('\n', stderr); |
| 364 |
return(1); |
| 365 |
} |
| 366 |
if (ncomp <= 0) { |
| 367 |
fputs(progname, stderr); |
| 368 |
fputs(": illegal number of components\n", stderr); |
| 369 |
return(1); |
| 370 |
} |
| 371 |
if (!(asiz < 0 ? colr_copyf(fp) : |
| 372 |
asiz ? binary_copyf(fp, asiz) : ascii_copyf(fp))) |
| 373 |
return(1); |
| 374 |
/* need to consume the rest? */ |
| 375 |
if (fp == stdin && rmin+nrows < numscans(&res) && |
| 376 |
fseek(fp, 0L, SEEK_END) < 0) |
| 377 |
while (getc(fp) != EOF) |
| 378 |
; |
| 379 |
return(0); |
| 380 |
usage: |
| 381 |
fputs("Usage: ", stderr); |
| 382 |
fputs(progname, stderr); |
| 383 |
fputs(" row0 col0 nrows ncols [input [output]]\n", stderr); |
| 384 |
return(1); |
| 385 |
} |
