1 |
/* Copyright (c) 1986 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 |
#include "color.h" |
17 |
|
18 |
#include "targa.h" |
19 |
|
20 |
#define goodpic(h) (((h)->dataType==IM_RGB || (h)->dataType==IM_CRGB) \ |
21 |
&& ((h)->dataBits==16 || (h)->dataBits==24)) |
22 |
|
23 |
#define taralloc(h) (unsigned char *)emalloc((h)->x*(h)->y*(h)->dataBits/8) |
24 |
|
25 |
#define readtarga(h,d,f) ((h)->dataBits==16 ? readt16(h,d,f) : \ |
26 |
readt24(h,d,f)) |
27 |
|
28 |
#define writetarga(h,d,f) ((h)->dataBits==16 ? writet16(h,d,f) : \ |
29 |
writet24(h,d,f)) |
30 |
|
31 |
extern char *ecalloc(), *emalloc(); |
32 |
|
33 |
extern double atof(), pow(); |
34 |
|
35 |
double gamma = 2.0; /* gamma correction */ |
36 |
|
37 |
char *progname; |
38 |
|
39 |
char msg[128]; |
40 |
|
41 |
|
42 |
main(argc, argv) |
43 |
int argc; |
44 |
char *argv[]; |
45 |
{ |
46 |
struct hdStruct head; |
47 |
int reverse = 0; |
48 |
int i; |
49 |
|
50 |
progname = argv[0]; |
51 |
|
52 |
head.dataBits = 16; |
53 |
for (i = 1; i < argc; i++) |
54 |
if (argv[i][0] == '-') |
55 |
switch (argv[i][1]) { |
56 |
case 'g': |
57 |
gamma = atof(argv[++i]); |
58 |
break; |
59 |
case 'r': |
60 |
reverse = !reverse; |
61 |
break; |
62 |
case '2': |
63 |
head.dataBits = 16; |
64 |
break; |
65 |
case '3': |
66 |
head.dataBits = 24; |
67 |
break; |
68 |
default: |
69 |
goto userr; |
70 |
} |
71 |
else |
72 |
break; |
73 |
|
74 |
if (i < argc-2) |
75 |
goto userr; |
76 |
/* open input file */ |
77 |
if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
78 |
sprintf(msg, "can't open input \"%s\"", argv[i]); |
79 |
quiterr(msg); |
80 |
} |
81 |
/* open output file */ |
82 |
if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
83 |
sprintf(msg, "can't open output \"%s\"", argv[i+1]); |
84 |
quiterr(msg); |
85 |
} |
86 |
/* convert */ |
87 |
if (reverse) { |
88 |
/* get header */ |
89 |
if (getthead(&head, NULL, stdin) < 0) |
90 |
quiterr("bad targa file"); |
91 |
if (!goodpic(&head)) |
92 |
quiterr("incompatible format"); |
93 |
/* put header */ |
94 |
printargs(argc, argv, stdout); |
95 |
putchar('\n'); |
96 |
printf("-Y %d +X %d\n", head.y, head.x); |
97 |
/* convert file */ |
98 |
tg2ra(&head); |
99 |
} else { |
100 |
getheader(stdin, NULL); |
101 |
if (scanf("-Y %d +X %d\n", &head.y, &head.x) != 2) |
102 |
quiterr("bad picture file"); |
103 |
/* assign header */ |
104 |
head.textSize = 0; |
105 |
head.mapType = CM_NOMAP; |
106 |
head.dataType = IM_RGB; |
107 |
head.XOffset = 0; |
108 |
head.YOffset = 0; |
109 |
head.imType = 0; |
110 |
/* write header */ |
111 |
putthead(&head, NULL, stdout); |
112 |
/* convert file */ |
113 |
ra2tg(&head); |
114 |
} |
115 |
exit(0); |
116 |
userr: |
117 |
fprintf(stderr, "Usage: %s [-2|-3|-r][-g gamma] [input [output]]\n", |
118 |
progname); |
119 |
exit(1); |
120 |
} |
121 |
|
122 |
|
123 |
int |
124 |
getint2(fp) /* get a 2-byte positive integer */ |
125 |
register FILE *fp; |
126 |
{ |
127 |
register int b1, b2; |
128 |
|
129 |
if ((b1 = getc(fp)) == EOF || (b2 = getc(fp)) == EOF) |
130 |
quiterr("read error"); |
131 |
|
132 |
return(b1 | b2<<8); |
133 |
} |
134 |
|
135 |
|
136 |
putint2(i, fp) /* put a 2-byte positive integer */ |
137 |
register int i; |
138 |
register FILE *fp; |
139 |
{ |
140 |
putc(i&0xff, fp); |
141 |
putc(i>>8&0xff, fp); |
142 |
} |
143 |
|
144 |
|
145 |
quiterr(err) /* print message and exit */ |
146 |
char *err; |
147 |
{ |
148 |
fprintf(stderr, "%s: %s\n", progname, err); |
149 |
exit(1); |
150 |
} |
151 |
|
152 |
|
153 |
eputs(s) |
154 |
char *s; |
155 |
{ |
156 |
fputs(s, stderr); |
157 |
} |
158 |
|
159 |
|
160 |
quit(code) |
161 |
int code; |
162 |
{ |
163 |
exit(code); |
164 |
} |
165 |
|
166 |
|
167 |
getthead(hp, ip, fp) /* read header from input */ |
168 |
struct hdStruct *hp; |
169 |
char *ip; |
170 |
register FILE *fp; |
171 |
{ |
172 |
int nidbytes; |
173 |
|
174 |
if ((nidbytes = getc(fp)) == EOF) |
175 |
return(-1); |
176 |
hp->mapType = getc(fp); |
177 |
hp->dataType = getc(fp); |
178 |
hp->mapOrig = getint2(fp); |
179 |
hp->mapLength = getint2(fp); |
180 |
hp->CMapBits = getc(fp); |
181 |
hp->XOffset = getint2(fp); |
182 |
hp->YOffset = getint2(fp); |
183 |
hp->x = getint2(fp); |
184 |
hp->y = getint2(fp); |
185 |
hp->dataBits = getc(fp); |
186 |
hp->imType = getc(fp); |
187 |
|
188 |
if (ip != NULL) |
189 |
if (nidbytes) |
190 |
fread(ip, nidbytes, 1, fp); |
191 |
else |
192 |
*ip = '\0'; |
193 |
else if (nidbytes) |
194 |
fseek(fp, (long)nidbytes, 1); |
195 |
|
196 |
return(feof(fp) || ferror(fp) ? -1 : 0); |
197 |
} |
198 |
|
199 |
|
200 |
putthead(hp, ip, fp) /* write header to output */ |
201 |
struct hdStruct *hp; |
202 |
char *ip; |
203 |
register FILE *fp; |
204 |
{ |
205 |
if (ip != NULL) |
206 |
putc(strlen(ip), fp); |
207 |
else |
208 |
putc(0, fp); |
209 |
putc(hp->mapType, fp); |
210 |
putc(hp->dataType, fp); |
211 |
putint2(hp->mapOrig, fp); |
212 |
putint2(hp->mapLength, fp); |
213 |
putc(hp->CMapBits, fp); |
214 |
putint2(hp->XOffset, fp); |
215 |
putint2(hp->YOffset, fp); |
216 |
putint2(hp->x, fp); |
217 |
putint2(hp->y, fp); |
218 |
putc(hp->dataBits, fp); |
219 |
putc(hp->imType, fp); |
220 |
|
221 |
if (ip != NULL) |
222 |
fputs(ip, fp); |
223 |
|
224 |
return(ferror(fp) ? -1 : 0); |
225 |
} |
226 |
|
227 |
|
228 |
tg2ra(hp) /* targa file to RADIANCE file */ |
229 |
struct hdStruct *hp; |
230 |
{ |
231 |
float gmap[256]; |
232 |
COLOR *scanline; |
233 |
unsigned char *tarData; |
234 |
register int i, j; |
235 |
/* set up gamma correction */ |
236 |
for (i = 0; i < 256; i++) |
237 |
gmap[i] = pow((i+.5)/256., gamma); |
238 |
/* skip color table */ |
239 |
if (hp->mapType == CM_HASMAP) |
240 |
fseek(stdin, (long)hp->mapLength*hp->CMapBits/8, 1); |
241 |
/* allocate targa data */ |
242 |
tarData = taralloc(hp); |
243 |
/* get data */ |
244 |
readtarga(hp, tarData, stdin); |
245 |
/* allocate input scanline */ |
246 |
scanline = (COLOR *)emalloc(hp->x*sizeof(COLOR)); |
247 |
/* convert file */ |
248 |
for (i = hp->y-1; i >= 0; i--) { |
249 |
if (hp->dataBits == 16) { |
250 |
register unsigned short *dp; |
251 |
dp = (unsigned short *)tarData + i*hp->x; |
252 |
for (j = 0; j < hp->x; j++) { |
253 |
setcolor(scanline[j], gmap[*dp>>7 & 0xf8], |
254 |
gmap[*dp>>2 & 0xf8], |
255 |
gmap[*dp<<3 & 0xf8]); |
256 |
dp++; |
257 |
} |
258 |
} else { /* hp->dataBits == 24 */ |
259 |
register unsigned char *dp; |
260 |
dp = (unsigned char *)tarData + i*3*hp->x; |
261 |
for (j = 0; j < hp->x; j++) { |
262 |
setcolor(scanline[j], gmap[dp[2]], |
263 |
gmap[dp[1]], |
264 |
gmap[dp[0]]); |
265 |
dp += 3; |
266 |
} |
267 |
} |
268 |
if (fwritescan(scanline, hp->x, stdout) < 0) |
269 |
quiterr("error writing RADIANCE file"); |
270 |
} |
271 |
free((char *)scanline); |
272 |
free((char *)tarData); |
273 |
} |
274 |
|
275 |
|
276 |
ra2tg(hp) /* convert radiance to targa file */ |
277 |
struct hdStruct *hp; |
278 |
{ |
279 |
#define map(v) (v >= 1.0 ? 1023 : (int)(v*1023.+.5)) |
280 |
unsigned char gmap[1024]; |
281 |
register int i, j; |
282 |
unsigned char *tarData; |
283 |
COLOR *inline; |
284 |
/* set up gamma correction */ |
285 |
for (i = 0; i < 1024; i++) { |
286 |
j = 256.*pow((i+.5)/1024., 1./gamma); |
287 |
gmap[i] = hp->dataBits == 16 && j > 248 ? 248 : j; |
288 |
} |
289 |
/* allocate space for data */ |
290 |
inline = (COLOR *)emalloc(hp->x*sizeof(COLOR)); |
291 |
tarData = taralloc(hp); |
292 |
/* convert file */ |
293 |
for (j = hp->y-1; j >= 0; j--) { |
294 |
if (freadscan(inline, hp->x, stdin) < 0) |
295 |
quiterr("error reading RADIANCE file"); |
296 |
if (hp->dataBits == 16) { |
297 |
register unsigned short *dp; |
298 |
dp = (unsigned short *)tarData + j*hp->x; |
299 |
for (i = 0; i < hp->x; i++) { |
300 |
*dp = ((gmap[map(colval(inline[i],RED))] |
301 |
+(random()&7)) & 0xf8)<<7; |
302 |
*dp |= ((gmap[map(colval(inline[i],GRN))] |
303 |
+(random()&7)) & 0xf8)<<2; |
304 |
*dp++ |= (gmap[map(colval(inline[i],BLU))] |
305 |
+(random()&7))>>3; |
306 |
} |
307 |
} else { /* hp->dataBits == 24 */ |
308 |
register unsigned char *dp; |
309 |
dp = (unsigned char *)tarData + j*3*hp->x; |
310 |
for (i = 0; i < hp->x; i++) { |
311 |
*dp++ = gmap[map(colval(inline[i],BLU))]; |
312 |
*dp++ = gmap[map(colval(inline[i],GRN))]; |
313 |
*dp++ = gmap[map(colval(inline[i],RED))]; |
314 |
} |
315 |
} |
316 |
} |
317 |
/* write out targa data */ |
318 |
writetarga(hp, tarData, stdout); |
319 |
|
320 |
free((char *)inline); |
321 |
free((char *)tarData); |
322 |
#undef map |
323 |
} |
324 |
|
325 |
|
326 |
writet24(h, d, fp) /* write out 24-bit targa data */ |
327 |
struct hdStruct *h; |
328 |
unsigned char *d; |
329 |
FILE *fp; |
330 |
{ |
331 |
if (h->dataType == IM_RGB) { /* uncompressed */ |
332 |
if (fwrite(d, 3*h->x, h->y, fp) != h->y) |
333 |
quiterr("error writing targa file"); |
334 |
return; |
335 |
} |
336 |
quiterr("unsupported output type"); |
337 |
} |
338 |
|
339 |
|
340 |
writet16(h, d, fp) /* write out 16-bit targa data */ |
341 |
struct hdStruct *h; |
342 |
register unsigned short *d; |
343 |
FILE *fp; |
344 |
{ |
345 |
register int cnt; |
346 |
|
347 |
if (h->dataType == IM_RGB) { /* uncompressed */ |
348 |
for (cnt = h->x*h->y; cnt-- > 0; ) |
349 |
putint2(*d++, fp); |
350 |
if (ferror(fp)) |
351 |
quiterr("error writing targa file"); |
352 |
return; |
353 |
} |
354 |
quiterr("unsupported output type"); |
355 |
} |
356 |
|
357 |
|
358 |
readt24(h, data, fp) /* read in 24-bit targa data */ |
359 |
register struct hdStruct *h; |
360 |
unsigned char *data; |
361 |
FILE *fp; |
362 |
{ |
363 |
register int cnt, c; |
364 |
register unsigned char *dp; |
365 |
int r, g, b; |
366 |
|
367 |
if (h->dataType == IM_RGB) { /* uncompressed */ |
368 |
if (fread(data, 3*h->x, h->y, fp) != h->y) |
369 |
goto readerr; |
370 |
return; |
371 |
} |
372 |
for (dp = data; dp < data+3*h->x*h->y; ) { |
373 |
if ((c = getc(fp)) == EOF) |
374 |
goto readerr; |
375 |
cnt = (c & 0x7f) + 1; |
376 |
if (c & 0x80) { /* repeated pixel */ |
377 |
b = getc(fp); g = getc(fp); |
378 |
if ((r = getc(fp)) == EOF) |
379 |
goto readerr; |
380 |
while (cnt--) { |
381 |
*dp++ = b; |
382 |
*dp++ = g; |
383 |
*dp++ = r; |
384 |
} |
385 |
} else /* non-repeating pixels */ |
386 |
while (cnt--) { |
387 |
*dp++ = getc(fp); *dp++ = getc(fp); |
388 |
if ((r = getc(fp)) == EOF) |
389 |
goto readerr; |
390 |
*dp++ = r; |
391 |
} |
392 |
} |
393 |
return; |
394 |
readerr: |
395 |
quiterr("error reading targa file"); |
396 |
} |
397 |
|
398 |
|
399 |
readt16(h, data, fp) /* read in 16-bit targa data */ |
400 |
register struct hdStruct *h; |
401 |
unsigned short *data; |
402 |
FILE *fp; |
403 |
{ |
404 |
register int cnt, c; |
405 |
register unsigned short *dp; |
406 |
|
407 |
if (h->dataType == IM_RGB) { /* uncompressed */ |
408 |
dp = data; |
409 |
for (cnt = h->x*h->y; cnt-- > 0; ) |
410 |
*dp++ = getint2(fp); |
411 |
return; |
412 |
} |
413 |
for (dp = data; dp < data+h->x*h->y; ) { |
414 |
if ((c = getc(fp)) == EOF) |
415 |
goto readerr; |
416 |
cnt = (c & 0x7f) + 1; |
417 |
if (c & 0x80) { /* repeated pixel */ |
418 |
c = getint2(fp); |
419 |
while (cnt--) |
420 |
*dp++ = c; |
421 |
} else /* non-repeating pixels */ |
422 |
while (cnt--) |
423 |
*dp++ = getint2(fp); |
424 |
} |
425 |
return; |
426 |
readerr: |
427 |
quiterr("error reading targa file"); |
428 |
} |