1 |
/* Copyright (c) 1991 Regents of the University of California */ |
2 |
|
3 |
#ifndef lint |
4 |
static char SCCSid[] = "$SunId$ LBL"; |
5 |
#endif |
6 |
|
7 |
/* |
8 |
* ra_t8.c - program to convert between RADIANCE and |
9 |
* Targa 8-bit color-mapped images. |
10 |
* |
11 |
* 8/22/88 Adapted from ra_pr.c |
12 |
*/ |
13 |
|
14 |
#include <stdio.h> |
15 |
|
16 |
#include "color.h" |
17 |
|
18 |
#include "pic.h" |
19 |
|
20 |
#include "targa.h" |
21 |
|
22 |
#ifndef BSD |
23 |
#define bcopy(s,d,n) (void)memcpy(d,s,n) |
24 |
extern char *memcpy(); |
25 |
#endif |
26 |
/* descriptor for a picture file or frame buffer */ |
27 |
typedef struct { |
28 |
char *name; /* file name */ |
29 |
FILE *fp; /* file pointer */ |
30 |
int nexty; /* file positioning */ |
31 |
int bytes_line; /* 0 == variable length lines */ |
32 |
union { |
33 |
long b; /* initial scanline */ |
34 |
long *y; /* individual scanline */ |
35 |
} pos; /* position(s) */ |
36 |
} pic; |
37 |
|
38 |
#define goodpic(h) (my_imType(h) && my_mapType(h)) |
39 |
#define my_imType(h) (((h)->dataType==IM_CMAP || (h)->dataType==IM_CCMAP) \ |
40 |
&& (h)->dataBits==8 && (h)->imType==0) |
41 |
#define my_mapType(h) ((h)->mapType==CM_HASMAP && \ |
42 |
((h)->CMapBits==24 || (h)->CMapBits==32)) |
43 |
|
44 |
#define taralloc(h) (pixel *)emalloc((h)->x*(h)->y*sizeof(pixel)) |
45 |
|
46 |
extern pic *openinput(); |
47 |
|
48 |
extern char *ecalloc(), *emalloc(); |
49 |
|
50 |
extern long ftell(); |
51 |
|
52 |
extern double atof(), pow(); |
53 |
|
54 |
double gamma = 2.2; /* gamma correction */ |
55 |
|
56 |
int bradj = 0; /* brightness adjustment */ |
57 |
|
58 |
pic *inpic; |
59 |
|
60 |
char *progname; |
61 |
|
62 |
char errmsg[128]; |
63 |
|
64 |
COLR *inl; |
65 |
|
66 |
pixel *tarData; |
67 |
|
68 |
int xmax, ymax; |
69 |
|
70 |
|
71 |
main(argc, argv) |
72 |
int argc; |
73 |
char *argv[]; |
74 |
{ |
75 |
colormap rasmap; |
76 |
struct hdStruct head; |
77 |
int dither = 1; |
78 |
int reverse = 0; |
79 |
int ncolors = 256; |
80 |
int greyscale = 0; |
81 |
int i; |
82 |
|
83 |
progname = argv[0]; |
84 |
|
85 |
for (i = 1; i < argc; i++) |
86 |
if (argv[i][0] == '-') |
87 |
switch (argv[i][1]) { |
88 |
case 'd': |
89 |
dither = !dither; |
90 |
break; |
91 |
case 'g': |
92 |
gamma = atof(argv[++i]); |
93 |
break; |
94 |
case 'r': |
95 |
reverse = !reverse; |
96 |
break; |
97 |
case 'b': |
98 |
greyscale = 1; |
99 |
break; |
100 |
case 'e': |
101 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
102 |
goto userr; |
103 |
bradj = atoi(argv[++i]); |
104 |
break; |
105 |
case 'c': |
106 |
ncolors = atoi(argv[++i]); |
107 |
break; |
108 |
default: |
109 |
goto userr; |
110 |
} |
111 |
else |
112 |
break; |
113 |
|
114 |
if (reverse) { |
115 |
if (i < argc-2) |
116 |
goto userr; |
117 |
if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
118 |
sprintf(errmsg, "can't open input \"%s\"", argv[i]); |
119 |
quiterr(errmsg); |
120 |
} |
121 |
/* get header */ |
122 |
if (getthead(&head, NULL, stdin) < 0) |
123 |
quiterr("bad targa file"); |
124 |
if (!goodpic(&head)) |
125 |
quiterr("incompatible format"); |
126 |
xmax = head.x; |
127 |
ymax = head.y; |
128 |
/* open output file */ |
129 |
if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
130 |
sprintf(errmsg, "can't open output \"%s\"", argv[i+1]); |
131 |
quiterr(errmsg); |
132 |
} |
133 |
/* put header */ |
134 |
printargs(i, argv, stdout); |
135 |
fputformat(COLRFMT, stdout); |
136 |
putchar('\n'); |
137 |
fputresolu(YMAJOR|YDECR, xmax, ymax, stdout); |
138 |
/* convert file */ |
139 |
tg2ra(&head); |
140 |
} else { |
141 |
if (i < argc-2 || (!greyscale && i > argc-1)) |
142 |
goto userr; |
143 |
if ((inpic = openinput(argv[i], &head)) == NULL) { |
144 |
sprintf(errmsg, "can't open input \"%s\"", argv[i]); |
145 |
quiterr(errmsg); |
146 |
} |
147 |
if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
148 |
sprintf(errmsg, "can't open output \"%s\"", argv[i+1]); |
149 |
quiterr(errmsg); |
150 |
} |
151 |
/* write header */ |
152 |
putthead(&head, NULL, stdout); |
153 |
/* convert file */ |
154 |
if (greyscale) |
155 |
biq(dither,ncolors,1,rasmap); |
156 |
else |
157 |
ciq(dither,ncolors,1,rasmap); |
158 |
/* write data */ |
159 |
writetarga(&head, tarData, stdout); |
160 |
} |
161 |
quiterr(NULL); |
162 |
userr: |
163 |
fprintf(stderr, |
164 |
"Usage: %s [-d][-c ncolors][-b][-g gamma][-e +/-stops] input [output]\n", |
165 |
progname); |
166 |
fprintf(stderr, " Or: %s -r [-g gamma][-e +/-stops] [input [output]]\n", |
167 |
progname); |
168 |
exit(1); |
169 |
} |
170 |
|
171 |
|
172 |
int |
173 |
getint2(fp) /* get a 2-byte positive integer */ |
174 |
register FILE *fp; |
175 |
{ |
176 |
register int b1, b2; |
177 |
|
178 |
if ((b1 = getc(fp)) == EOF || (b2 = getc(fp)) == EOF) |
179 |
quiterr("read error"); |
180 |
|
181 |
return(b1 | b2<<8); |
182 |
} |
183 |
|
184 |
|
185 |
putint2(i, fp) /* put a 2-byte positive integer */ |
186 |
register int i; |
187 |
register FILE *fp; |
188 |
{ |
189 |
putc(i&0xff, fp); |
190 |
putc(i>>8&0xff, fp); |
191 |
} |
192 |
|
193 |
|
194 |
quiterr(err) /* print message and exit */ |
195 |
char *err; |
196 |
{ |
197 |
if (err != NULL) { |
198 |
fprintf(stderr, "%s: %s\n", progname, err); |
199 |
exit(1); |
200 |
} |
201 |
exit(0); |
202 |
} |
203 |
|
204 |
|
205 |
eputs(s) |
206 |
char *s; |
207 |
{ |
208 |
fputs(s, stderr); |
209 |
} |
210 |
|
211 |
|
212 |
quit(code) |
213 |
int code; |
214 |
{ |
215 |
exit(code); |
216 |
} |
217 |
|
218 |
|
219 |
getthead(hp, ip, fp) /* read header from input */ |
220 |
struct hdStruct *hp; |
221 |
char *ip; |
222 |
register FILE *fp; |
223 |
{ |
224 |
int nidbytes; |
225 |
|
226 |
if ((nidbytes = getc(fp)) == EOF) |
227 |
return(-1); |
228 |
hp->mapType = getc(fp); |
229 |
hp->dataType = getc(fp); |
230 |
hp->mapOrig = getint2(fp); |
231 |
hp->mapLength = getint2(fp); |
232 |
hp->CMapBits = getc(fp); |
233 |
hp->XOffset = getint2(fp); |
234 |
hp->YOffset = getint2(fp); |
235 |
hp->x = getint2(fp); |
236 |
hp->y = getint2(fp); |
237 |
hp->dataBits = getc(fp); |
238 |
hp->imType = getc(fp); |
239 |
|
240 |
if (ip != NULL) |
241 |
if (nidbytes) |
242 |
fread((char *)ip, nidbytes, 1, fp); |
243 |
else |
244 |
*ip = '\0'; |
245 |
else if (nidbytes) |
246 |
fseek(fp, (long)nidbytes, 1); |
247 |
|
248 |
return(feof(fp) || ferror(fp) ? -1 : 0); |
249 |
} |
250 |
|
251 |
|
252 |
putthead(hp, ip, fp) /* write header to output */ |
253 |
struct hdStruct *hp; |
254 |
char *ip; |
255 |
register FILE *fp; |
256 |
{ |
257 |
if (ip != NULL) |
258 |
putc(strlen(ip), fp); |
259 |
else |
260 |
putc(0, fp); |
261 |
putc(hp->mapType, fp); |
262 |
putc(hp->dataType, fp); |
263 |
putint2(hp->mapOrig, fp); |
264 |
putint2(hp->mapLength, fp); |
265 |
putc(hp->CMapBits, fp); |
266 |
putint2(hp->XOffset, fp); |
267 |
putint2(hp->YOffset, fp); |
268 |
putint2(hp->x, fp); |
269 |
putint2(hp->y, fp); |
270 |
putc(hp->dataBits, fp); |
271 |
putc(hp->imType, fp); |
272 |
|
273 |
if (ip != NULL) |
274 |
fputs(ip, fp); |
275 |
|
276 |
return(ferror(fp) ? -1 : 0); |
277 |
} |
278 |
|
279 |
|
280 |
pic * |
281 |
openinput(fname, h) /* open RADIANCE input file */ |
282 |
char *fname; |
283 |
register struct hdStruct *h; |
284 |
{ |
285 |
register pic *p; |
286 |
|
287 |
p = (pic *)emalloc(sizeof(pic)); |
288 |
p->name = fname; |
289 |
if (fname == NULL) |
290 |
p->fp = stdin; |
291 |
else if ((p->fp = fopen(fname, "r")) == NULL) |
292 |
return(NULL); |
293 |
/* get header info. */ |
294 |
if (checkheader(p->fp, COLRFMT, NULL) < 0 || |
295 |
fgetresolu(&xmax, &ymax, p->fp) != (YMAJOR|YDECR)) |
296 |
quiterr("bad picture format"); |
297 |
p->nexty = 0; |
298 |
p->bytes_line = 0; /* variable length lines */ |
299 |
p->pos.y = (long *)ecalloc(ymax, sizeof(long)); |
300 |
p->pos.y[0] = ftell(p->fp); |
301 |
/* assign header */ |
302 |
h->textSize = 0; |
303 |
h->mapType = CM_HASMAP; |
304 |
h->dataType = IM_CMAP; |
305 |
h->mapOrig = 0; |
306 |
h->mapLength = 256; |
307 |
h->CMapBits = 24; |
308 |
h->XOffset = 0; |
309 |
h->YOffset = 0; |
310 |
h->x = xmax; |
311 |
h->y = ymax; |
312 |
h->dataBits = 8; |
313 |
h->imType = 0; |
314 |
/* allocate scanline */ |
315 |
inl = (COLR *)emalloc(xmax*sizeof(COLR)); |
316 |
/* allocate targa data */ |
317 |
tarData = taralloc(h); |
318 |
|
319 |
return(p); |
320 |
} |
321 |
|
322 |
|
323 |
tg2ra(hp) /* targa file to RADIANCE file */ |
324 |
struct hdStruct *hp; |
325 |
{ |
326 |
union { |
327 |
BYTE c3[256][3]; |
328 |
BYTE c4[256][4]; |
329 |
} map; |
330 |
COLR ctab[256]; |
331 |
COLR *scanline; |
332 |
register int i, j; |
333 |
|
334 |
/* get color table */ |
335 |
if ((hp->CMapBits==24 ? fread((char *)map.c3,sizeof(map.c3),1,stdin) : |
336 |
fread((char *)map.c4,sizeof(map.c4),1,stdin)) != 1) |
337 |
quiterr("error reading color table"); |
338 |
/* convert table */ |
339 |
for (i = hp->mapOrig; i < hp->mapOrig+hp->mapLength; i++) |
340 |
if (hp->CMapBits == 24) |
341 |
setcolr(ctab[i], |
342 |
pow((map.c3[i][2]+.5)/256.,gamma), |
343 |
pow((map.c3[i][1]+.5)/256.,gamma), |
344 |
pow((map.c3[i][0]+.5)/256.,gamma)); |
345 |
else |
346 |
setcolr(ctab[i], |
347 |
pow((map.c4[i][3]+.5)/256.,gamma), |
348 |
pow((map.c4[i][2]+.5)/256.,gamma), |
349 |
pow((map.c4[i][1]+.5)/256.,gamma)); |
350 |
if (bradj) |
351 |
shiftcolrs(ctab, 256, bradj); |
352 |
/* allocate targa data */ |
353 |
tarData = taralloc(hp); |
354 |
/* get data */ |
355 |
readtarga(hp, tarData, stdin); |
356 |
/* allocate input scanline */ |
357 |
scanline = (COLR *)emalloc(xmax*sizeof(COLR)); |
358 |
/* convert file */ |
359 |
for (i = ymax-1; i >= 0; i--) { |
360 |
for (j = 0; j < xmax; j++) |
361 |
copycolr(scanline[j], ctab[tarData[i*xmax+j]]); |
362 |
if (fwritecolrs(scanline, xmax, stdout) < 0) |
363 |
quiterr("error writing RADIANCE file"); |
364 |
} |
365 |
free((char *)scanline); |
366 |
free((char *)tarData); |
367 |
} |
368 |
|
369 |
|
370 |
picreadline3(y, l3) /* read in 3-byte scanline */ |
371 |
int y; |
372 |
register rgbpixel *l3; |
373 |
{ |
374 |
register int i; |
375 |
|
376 |
if (inpic->nexty != y) { /* find scanline */ |
377 |
if (inpic->bytes_line == 0) { |
378 |
if (inpic->pos.y[y] == 0) { |
379 |
while (inpic->nexty < y) { |
380 |
if (freadcolrs(inl, xmax, inpic->fp) < 0) |
381 |
quiterr("read error in picreadline3"); |
382 |
inpic->pos.y[++inpic->nexty] = ftell(inpic->fp); |
383 |
} |
384 |
} else if (fseek(inpic->fp, inpic->pos.y[y], 0) == EOF) |
385 |
quiterr("seek error in picreadline3"); |
386 |
} else if (fseek(inpic->fp, y*inpic->bytes_line+inpic->pos.b, 0) == EOF) |
387 |
quiterr("seek error in picreadline3"); |
388 |
} else if (inpic->bytes_line == 0 && inpic->pos.y[inpic->nexty] == 0) |
389 |
inpic->pos.y[inpic->nexty] = ftell(inpic->fp); |
390 |
if (freadcolrs(inl, xmax, inpic->fp) < 0) /* read scanline */ |
391 |
quiterr("read error in picreadline3"); |
392 |
inpic->nexty = y+1; |
393 |
/* convert scanline */ |
394 |
normcolrs(inl, xmax, bradj); |
395 |
for (i = 0; i < xmax; i++) { |
396 |
l3[i].r = inl[i][RED]; |
397 |
l3[i].g = inl[i][GRN]; |
398 |
l3[i].b = inl[i][BLU]; |
399 |
} |
400 |
} |
401 |
|
402 |
|
403 |
picwriteline(y, l) /* save output scanline */ |
404 |
int y; |
405 |
pixel *l; |
406 |
{ |
407 |
bcopy((char *)l, (char *)&tarData[(ymax-1-y)*xmax], xmax*sizeof(pixel)); |
408 |
} |
409 |
|
410 |
|
411 |
writetarga(h, d, fp) /* write out targa data */ |
412 |
struct hdStruct *h; |
413 |
pixel *d; |
414 |
FILE *fp; |
415 |
{ |
416 |
if (h->dataType == IM_CMAP) { /* uncompressed */ |
417 |
if (fwrite((char *)d,h->x*sizeof(pixel),h->y,fp) != h->y) |
418 |
quiterr("error writing targa file"); |
419 |
return; |
420 |
} |
421 |
quiterr("unsupported output type"); |
422 |
} |
423 |
|
424 |
|
425 |
readtarga(h, data, fp) /* read in targa data */ |
426 |
struct hdStruct *h; |
427 |
pixel *data; |
428 |
FILE *fp; |
429 |
{ |
430 |
register int cnt, c; |
431 |
register pixel *dp; |
432 |
|
433 |
if (h->dataType == IM_CMAP) { /* uncompressed */ |
434 |
if (fread((char *)data,h->x*sizeof(pixel),h->y,fp) != h->y) |
435 |
goto readerr; |
436 |
return; |
437 |
} |
438 |
for (dp = data; dp < data+h->x*h->y; ) { |
439 |
if ((c = getc(fp)) == EOF) |
440 |
goto readerr; |
441 |
cnt = (c & 0x7f) + 1; |
442 |
if (c & 0x80) { /* repeated pixel */ |
443 |
if ((c = getc(fp)) == EOF) |
444 |
goto readerr; |
445 |
while (cnt--) |
446 |
*dp++ = c; |
447 |
} else /* non-repeating pixels */ |
448 |
while (cnt--) { |
449 |
if ((c = getc(fp)) == EOF) |
450 |
goto readerr; |
451 |
*dp++ = c; |
452 |
} |
453 |
} |
454 |
return; |
455 |
readerr: |
456 |
quiterr("error reading targa file"); |
457 |
} |
458 |
|
459 |
|
460 |
picwritecm(cm) /* write out color map */ |
461 |
colormap cm; |
462 |
{ |
463 |
register int i, j; |
464 |
|
465 |
for (j = 0; j < 256; j++) |
466 |
for (i = 2; i >= 0; i--) |
467 |
putc(cm[i][j], stdout); |
468 |
} |
469 |
|
470 |
|
471 |
picreadcm(map) /* do gamma correction if requested */ |
472 |
colormap map; |
473 |
{ |
474 |
register int i, val; |
475 |
|
476 |
for (i = 0; i < 256; i++) { |
477 |
val = pow((i+0.5)/256.0, 1.0/gamma) * 256.0; |
478 |
map[0][i] = map[1][i] = map[2][i] = val; |
479 |
} |
480 |
} |