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_t16.c - program to convert between RADIANCE and |
9 |
* Targa 16, 24 and 32-bit images. |
10 |
* |
11 |
* 11/2/88 Adapted from ra_t8.c |
12 |
*/ |
13 |
|
14 |
#include <stdio.h> |
15 |
|
16 |
#ifdef MSDOS |
17 |
#include <fcntl.h> |
18 |
#endif |
19 |
|
20 |
#include <math.h> |
21 |
|
22 |
#include "color.h" |
23 |
|
24 |
#include "resolu.h" |
25 |
|
26 |
#include "random.h" |
27 |
|
28 |
#include "targa.h" |
29 |
|
30 |
#define goodpic(h) (((h)->dataType==IM_RGB || (h)->dataType==IM_CRGB) \ |
31 |
&& ((h)->dataBits==16 || (h)->dataBits==24)) |
32 |
|
33 |
#define taralloc(h) (unsigned char *)emalloc((h)->x*(h)->y*(h)->dataBits/8) |
34 |
|
35 |
#define readtarga(h,d,f) ((h)->dataBits==16 ? readt16(h,d,f) : \ |
36 |
readt24(h,d,f)) |
37 |
|
38 |
#define writetarga(h,d,f) ((h)->dataBits==16 ? writet16(h,d,f) : \ |
39 |
writet24(h,d,f)) |
40 |
|
41 |
extern char *ecalloc(), *emalloc(); |
42 |
|
43 |
double gamcor = 2.2; /* gamma correction */ |
44 |
|
45 |
int bradj = 0; /* brightness adjustment */ |
46 |
|
47 |
char *progname; |
48 |
|
49 |
char msg[128]; |
50 |
|
51 |
|
52 |
main(argc, argv) |
53 |
int argc; |
54 |
char *argv[]; |
55 |
{ |
56 |
struct hdStruct head; |
57 |
int reverse = 0; |
58 |
int i; |
59 |
#ifdef MSDOS |
60 |
extern int _fmode; |
61 |
_fmode = O_BINARY; |
62 |
setmode(fileno(stdin), O_BINARY); |
63 |
setmode(fileno(stdout), O_BINARY); |
64 |
#endif |
65 |
progname = argv[0]; |
66 |
|
67 |
head.dataBits = 16; |
68 |
for (i = 1; i < argc; i++) |
69 |
if (argv[i][0] == '-') |
70 |
switch (argv[i][1]) { |
71 |
case 'g': |
72 |
gamcor = atof(argv[++i]); |
73 |
break; |
74 |
case 'r': |
75 |
reverse = !reverse; |
76 |
break; |
77 |
case '2': |
78 |
head.dataBits = 16; |
79 |
break; |
80 |
case '3': |
81 |
head.dataBits = 24; |
82 |
break; |
83 |
case 'e': |
84 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
85 |
goto userr; |
86 |
bradj = atoi(argv[++i]); |
87 |
break; |
88 |
default: |
89 |
goto userr; |
90 |
} |
91 |
else |
92 |
break; |
93 |
|
94 |
if (i < argc-2) |
95 |
goto userr; |
96 |
/* open input file */ |
97 |
if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
98 |
sprintf(msg, "can't open input \"%s\"", argv[i]); |
99 |
quiterr(msg); |
100 |
} |
101 |
/* open output file */ |
102 |
if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
103 |
sprintf(msg, "can't open output \"%s\"", argv[i+1]); |
104 |
quiterr(msg); |
105 |
} |
106 |
/* set gamma */ |
107 |
setcolrgam(gamcor); |
108 |
/* convert */ |
109 |
if (reverse) { |
110 |
/* get header */ |
111 |
if (getthead(&head, NULL, stdin) < 0) |
112 |
quiterr("bad targa file"); |
113 |
if (!goodpic(&head)) |
114 |
quiterr("incompatible format"); |
115 |
/* put header */ |
116 |
newheader("RADIANCE", stdout); |
117 |
printargs(i, argv, stdout); |
118 |
fputformat(COLRFMT, stdout); |
119 |
putchar('\n'); |
120 |
fprtresolu(head.x, head.y, stdout); |
121 |
/* convert file */ |
122 |
tg2ra(&head); |
123 |
} else { |
124 |
if (checkheader(stdin, COLRFMT, NULL) < 0 || |
125 |
fgetresolu(&head.x, &head.y, stdin) < 0) |
126 |
quiterr("bad picture file"); |
127 |
/* assign header */ |
128 |
head.textSize = 0; |
129 |
head.mapType = CM_NOMAP; |
130 |
head.dataType = IM_RGB; |
131 |
head.XOffset = 0; |
132 |
head.YOffset = 0; |
133 |
head.imType = 0; |
134 |
/* write header */ |
135 |
putthead(&head, NULL, stdout); |
136 |
/* convert file */ |
137 |
ra2tg(&head); |
138 |
} |
139 |
exit(0); |
140 |
userr: |
141 |
fprintf(stderr, "Usage: %s [-2|-3|-r][-g gamma][-e +/-stops] [input [output]]\n", |
142 |
progname); |
143 |
exit(1); |
144 |
} |
145 |
|
146 |
|
147 |
int |
148 |
getint2(fp) /* get a 2-byte positive integer */ |
149 |
register FILE *fp; |
150 |
{ |
151 |
register int b1, b2; |
152 |
|
153 |
if ((b1 = getc(fp)) == EOF || (b2 = getc(fp)) == EOF) |
154 |
quiterr("read error"); |
155 |
|
156 |
return(b1 | b2<<8); |
157 |
} |
158 |
|
159 |
|
160 |
putint2(i, fp) /* put a 2-byte positive integer */ |
161 |
register int i; |
162 |
register FILE *fp; |
163 |
{ |
164 |
putc(i&0xff, fp); |
165 |
putc(i>>8&0xff, fp); |
166 |
} |
167 |
|
168 |
|
169 |
quiterr(err) /* print message and exit */ |
170 |
char *err; |
171 |
{ |
172 |
fprintf(stderr, "%s: %s\n", progname, err); |
173 |
exit(1); |
174 |
} |
175 |
|
176 |
|
177 |
eputs(s) |
178 |
char *s; |
179 |
{ |
180 |
fputs(s, stderr); |
181 |
} |
182 |
|
183 |
|
184 |
quit(code) |
185 |
int code; |
186 |
{ |
187 |
exit(code); |
188 |
} |
189 |
|
190 |
|
191 |
getthead(hp, ip, fp) /* read header from input */ |
192 |
struct hdStruct *hp; |
193 |
char *ip; |
194 |
register FILE *fp; |
195 |
{ |
196 |
int nidbytes; |
197 |
|
198 |
if ((nidbytes = getc(fp)) == EOF) |
199 |
return(-1); |
200 |
hp->mapType = getc(fp); |
201 |
hp->dataType = getc(fp); |
202 |
hp->mapOrig = getint2(fp); |
203 |
hp->mapLength = getint2(fp); |
204 |
hp->CMapBits = getc(fp); |
205 |
hp->XOffset = getint2(fp); |
206 |
hp->YOffset = getint2(fp); |
207 |
hp->x = getint2(fp); |
208 |
hp->y = getint2(fp); |
209 |
hp->dataBits = getc(fp); |
210 |
hp->imType = getc(fp); |
211 |
|
212 |
if (ip != NULL) |
213 |
if (nidbytes) |
214 |
fread((char *)ip, nidbytes, 1, fp); |
215 |
else |
216 |
*ip = '\0'; |
217 |
else if (nidbytes) |
218 |
fseek(fp, (long)nidbytes, 1); |
219 |
|
220 |
return(feof(fp) || ferror(fp) ? -1 : 0); |
221 |
} |
222 |
|
223 |
|
224 |
putthead(hp, ip, fp) /* write header to output */ |
225 |
struct hdStruct *hp; |
226 |
char *ip; |
227 |
register FILE *fp; |
228 |
{ |
229 |
if (ip != NULL) |
230 |
putc(strlen(ip), fp); |
231 |
else |
232 |
putc(0, fp); |
233 |
putc(hp->mapType, fp); |
234 |
putc(hp->dataType, fp); |
235 |
putint2(hp->mapOrig, fp); |
236 |
putint2(hp->mapLength, fp); |
237 |
putc(hp->CMapBits, fp); |
238 |
putint2(hp->XOffset, fp); |
239 |
putint2(hp->YOffset, fp); |
240 |
putint2(hp->x, fp); |
241 |
putint2(hp->y, fp); |
242 |
putc(hp->dataBits, fp); |
243 |
putc(hp->imType, fp); |
244 |
|
245 |
if (ip != NULL) |
246 |
fputs(ip, fp); |
247 |
|
248 |
return(ferror(fp) ? -1 : 0); |
249 |
} |
250 |
|
251 |
|
252 |
tg2ra(hp) /* targa file to RADIANCE file */ |
253 |
struct hdStruct *hp; |
254 |
{ |
255 |
COLR *scanline; |
256 |
unsigned char *tarData; |
257 |
register int i, j; |
258 |
/* skip color table */ |
259 |
if (hp->mapType == CM_HASMAP) |
260 |
fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1); |
261 |
/* allocate targa data */ |
262 |
tarData = taralloc(hp); |
263 |
/* get data */ |
264 |
readtarga(hp, tarData, stdin); |
265 |
/* allocate input scanline */ |
266 |
scanline = (COLR *)emalloc(hp->x*sizeof(COLR)); |
267 |
/* convert file */ |
268 |
for (i = hp->y-1; i >= 0; i--) { |
269 |
if (hp->dataBits == 16) { |
270 |
register unsigned short *dp; |
271 |
dp = (unsigned short *)tarData + i*hp->x; |
272 |
for (j = 0; j < hp->x; j++) { |
273 |
scanline[j][RED] = *dp>>7 & 0xf8; |
274 |
scanline[j][GRN] = *dp>>2 & 0xf8; |
275 |
scanline[j][BLU] = *dp<<3 & 0xf8; |
276 |
dp++; |
277 |
} |
278 |
} else { /* hp->dataBits == 24 */ |
279 |
register unsigned char *dp; |
280 |
dp = (unsigned char *)tarData + i*3*hp->x; |
281 |
for (j = 0; j < hp->x; j++) { |
282 |
scanline[j][RED] = dp[2]; |
283 |
scanline[j][GRN] = dp[1]; |
284 |
scanline[j][BLU] = dp[0]; |
285 |
dp += 3; |
286 |
} |
287 |
} |
288 |
gambs_colrs(scanline, hp->x); |
289 |
if (bradj) |
290 |
shiftcolrs(scanline, hp->x, bradj); |
291 |
if (fwritecolrs(scanline, hp->x, stdout) < 0) |
292 |
quiterr("error writing RADIANCE file"); |
293 |
} |
294 |
free((char *)scanline); |
295 |
free((char *)tarData); |
296 |
} |
297 |
|
298 |
|
299 |
ra2tg(hp) /* convert radiance to targa file */ |
300 |
struct hdStruct *hp; |
301 |
{ |
302 |
register int i, j; |
303 |
unsigned char *tarData; |
304 |
COLR *inl; |
305 |
/* allocate space for data */ |
306 |
inl = (COLR *)emalloc(hp->x*sizeof(COLR)); |
307 |
tarData = taralloc(hp); |
308 |
/* convert file */ |
309 |
for (j = hp->y-1; j >= 0; j--) { |
310 |
if (freadcolrs(inl, hp->x, stdin) < 0) |
311 |
quiterr("error reading RADIANCE file"); |
312 |
if (bradj) |
313 |
shiftcolrs(inl, hp->x, bradj); |
314 |
colrs_gambs(inl, hp->x); |
315 |
if (hp->dataBits == 16) { |
316 |
register unsigned short *dp; |
317 |
register int v; |
318 |
dp = (unsigned short *)tarData + j*hp->x; |
319 |
for (i = 0; i < hp->x; i++) { |
320 |
v = inl[i][RED] + (random()&7); |
321 |
if (v > 255) v = 255; |
322 |
*dp = (v&0xf8)<<7; |
323 |
v = inl[i][GRN] + (random()&7); |
324 |
if (v > 255) v = 255; |
325 |
*dp |= (v&0xf8)<<2; |
326 |
v = inl[i][BLU] + (random()&7); |
327 |
if (v > 255) v = 255; |
328 |
*dp++ |= v>>3; |
329 |
} |
330 |
} else { /* hp->dataBits == 24 */ |
331 |
register unsigned char *dp; |
332 |
dp = (unsigned char *)tarData + j*3*hp->x; |
333 |
for (i = 0; i < hp->x; i++) { |
334 |
*dp++ = inl[i][BLU]; |
335 |
*dp++ = inl[i][GRN]; |
336 |
*dp++ = inl[i][RED]; |
337 |
} |
338 |
} |
339 |
} |
340 |
/* write out targa data */ |
341 |
writetarga(hp, tarData, stdout); |
342 |
|
343 |
free((char *)inl); |
344 |
free((char *)tarData); |
345 |
} |
346 |
|
347 |
|
348 |
writet24(h, d, fp) /* write out 24-bit targa data */ |
349 |
struct hdStruct *h; |
350 |
unsigned char *d; |
351 |
FILE *fp; |
352 |
{ |
353 |
if (h->dataType == IM_RGB) { /* uncompressed */ |
354 |
if (fwrite((char *)d, 3*h->x, h->y, fp) != h->y) |
355 |
quiterr("error writing targa file"); |
356 |
return; |
357 |
} |
358 |
quiterr("unsupported output type"); |
359 |
} |
360 |
|
361 |
|
362 |
writet16(h, d, fp) /* write out 16-bit targa data */ |
363 |
struct hdStruct *h; |
364 |
register unsigned short *d; |
365 |
FILE *fp; |
366 |
{ |
367 |
register int cnt; |
368 |
|
369 |
if (h->dataType == IM_RGB) { /* uncompressed */ |
370 |
for (cnt = h->x*h->y; cnt-- > 0; ) |
371 |
putint2(*d++, fp); |
372 |
if (ferror(fp)) |
373 |
quiterr("error writing targa file"); |
374 |
return; |
375 |
} |
376 |
quiterr("unsupported output type"); |
377 |
} |
378 |
|
379 |
|
380 |
readt24(h, data, fp) /* read in 24-bit targa data */ |
381 |
register struct hdStruct *h; |
382 |
unsigned char *data; |
383 |
FILE *fp; |
384 |
{ |
385 |
register int cnt, c; |
386 |
register unsigned char *dp; |
387 |
int r, g, b; |
388 |
|
389 |
if (h->dataType == IM_RGB) { /* uncompressed */ |
390 |
if (fread((char *)data, 3*h->x, h->y, fp) != h->y) |
391 |
goto readerr; |
392 |
return; |
393 |
} |
394 |
for (dp = data; dp < data+3*h->x*h->y; ) { |
395 |
if ((c = getc(fp)) == EOF) |
396 |
goto readerr; |
397 |
cnt = (c & 0x7f) + 1; |
398 |
if (c & 0x80) { /* repeated pixel */ |
399 |
b = getc(fp); g = getc(fp); |
400 |
if ((r = getc(fp)) == EOF) |
401 |
goto readerr; |
402 |
while (cnt--) { |
403 |
*dp++ = b; |
404 |
*dp++ = g; |
405 |
*dp++ = r; |
406 |
} |
407 |
} else /* non-repeating pixels */ |
408 |
while (cnt--) { |
409 |
*dp++ = getc(fp); *dp++ = getc(fp); |
410 |
if ((r = getc(fp)) == EOF) |
411 |
goto readerr; |
412 |
*dp++ = r; |
413 |
} |
414 |
} |
415 |
return; |
416 |
readerr: |
417 |
quiterr("error reading targa file"); |
418 |
} |
419 |
|
420 |
|
421 |
readt16(h, data, fp) /* read in 16-bit targa data */ |
422 |
register struct hdStruct *h; |
423 |
unsigned short *data; |
424 |
FILE *fp; |
425 |
{ |
426 |
register int cnt, c; |
427 |
register unsigned short *dp; |
428 |
|
429 |
if (h->dataType == IM_RGB) { /* uncompressed */ |
430 |
dp = data; |
431 |
for (cnt = h->x*h->y; cnt-- > 0; ) |
432 |
*dp++ = getint2(fp); |
433 |
return; |
434 |
} |
435 |
for (dp = data; dp < data+h->x*h->y; ) { |
436 |
if ((c = getc(fp)) == EOF) |
437 |
goto readerr; |
438 |
cnt = (c & 0x7f) + 1; |
439 |
if (c & 0x80) { /* repeated pixel */ |
440 |
c = getint2(fp); |
441 |
while (cnt--) |
442 |
*dp++ = c; |
443 |
} else /* non-repeating pixels */ |
444 |
while (cnt--) |
445 |
*dp++ = getint2(fp); |
446 |
} |
447 |
return; |
448 |
readerr: |
449 |
quiterr("error reading targa file"); |
450 |
} |