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_pr.c - program to convert between RADIANCE and pixrect picture format. |
9 |
* |
10 |
* 11/10/87 |
11 |
* 3/1/88 Added Paul Heckbert's color map allocation |
12 |
*/ |
13 |
|
14 |
#include <stdio.h> |
15 |
|
16 |
#include "rasterfile.h" |
17 |
|
18 |
#include "color.h" |
19 |
|
20 |
#include "pic.h" |
21 |
|
22 |
/* descriptor for a picture file or frame buffer */ |
23 |
typedef struct { |
24 |
char *name; /* file name */ |
25 |
FILE *fp; /* file pointer */ |
26 |
int nexty; /* file positioning */ |
27 |
int bytes_line; /* 0 == variable length lines */ |
28 |
union { |
29 |
long b; /* initial scanline */ |
30 |
long *y; /* individual scanline */ |
31 |
} pos; /* position(s) */ |
32 |
} pic; |
33 |
|
34 |
extern pic *openinput(), *openoutput(); |
35 |
|
36 |
extern char *ecalloc(), *emalloc(); |
37 |
|
38 |
extern long ftell(); |
39 |
|
40 |
extern double atof(), pow(); |
41 |
|
42 |
double gamma = 2.2; /* gamma correction */ |
43 |
|
44 |
int bradj = 0; /* brightness adjustment */ |
45 |
|
46 |
pic *inpic, *outpic; |
47 |
|
48 |
char *progname; |
49 |
|
50 |
char errmsg[128]; |
51 |
|
52 |
COLR *inl; |
53 |
|
54 |
int xmax, ymax; |
55 |
|
56 |
|
57 |
main(argc, argv) |
58 |
int argc; |
59 |
char *argv[]; |
60 |
{ |
61 |
colormap rasmap; |
62 |
struct rasterfile head; |
63 |
int dither = 1; |
64 |
int reverse = 0; |
65 |
int ncolors = 256; |
66 |
int greyscale = 0; |
67 |
int i; |
68 |
|
69 |
progname = argv[0]; |
70 |
|
71 |
for (i = 1; i < argc; i++) |
72 |
if (argv[i][0] == '-') |
73 |
switch (argv[i][1]) { |
74 |
case 'd': |
75 |
dither = !dither; |
76 |
break; |
77 |
case 'g': |
78 |
gamma = atof(argv[++i]); |
79 |
break; |
80 |
case 'b': |
81 |
greyscale = !greyscale; |
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 |
case 'r': |
89 |
reverse = !reverse; |
90 |
break; |
91 |
case 'c': |
92 |
ncolors = atoi(argv[++i]); |
93 |
break; |
94 |
default: |
95 |
goto userr; |
96 |
} |
97 |
else |
98 |
break; |
99 |
|
100 |
if (reverse) { |
101 |
if (i < argc-2) |
102 |
goto userr; |
103 |
if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
104 |
sprintf(errmsg, "can't open input \"%s\"", argv[i]); |
105 |
quiterr(errmsg); |
106 |
} |
107 |
if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
108 |
sprintf(errmsg, "can't open output \"%s\"", argv[i+1]); |
109 |
quiterr(errmsg); |
110 |
} |
111 |
/* get header */ |
112 |
if (fread((char *)&head, sizeof(head), 1, stdin) != 1) |
113 |
quiterr("missing header"); |
114 |
if (head.ras_magic != RAS_MAGIC) |
115 |
quiterr("bad raster format"); |
116 |
xmax = head.ras_width; |
117 |
ymax = head.ras_height; |
118 |
if (head.ras_type != RT_STANDARD || |
119 |
head.ras_maptype != RMT_EQUAL_RGB || |
120 |
head.ras_depth != 8) |
121 |
quiterr("incompatible format"); |
122 |
/* put header */ |
123 |
printargs(i, argv, stdout); |
124 |
fputformat(COLRFMT, stdout); |
125 |
putchar('\n'); |
126 |
fputresolu(YMAJOR|YDECR, xmax, ymax, stdout); |
127 |
/* convert file */ |
128 |
pr2ra(&head); |
129 |
} else { |
130 |
if (i < argc-2 || (!greyscale && i > argc-1)) |
131 |
goto userr; |
132 |
if ((inpic = openinput(argv[i], &head)) == NULL) { |
133 |
sprintf(errmsg, "can't open input \"%s\"", argv[i]); |
134 |
quiterr(errmsg); |
135 |
} |
136 |
if ((outpic = openoutput(i==argc-2 ? argv[i+1] : (char *)NULL, |
137 |
&head)) == NULL) { |
138 |
sprintf(errmsg, "can't open output \"%s\"", argv[i+1]); |
139 |
quiterr(errmsg); |
140 |
} |
141 |
/* convert file */ |
142 |
if (greyscale) |
143 |
biq(dither,ncolors,1,rasmap); |
144 |
else |
145 |
ciq(dither,ncolors,1,rasmap); |
146 |
} |
147 |
quiterr(NULL); |
148 |
userr: |
149 |
fprintf(stderr, |
150 |
"Usage: %s [-d][-c ncolors][-b][-g gamma][-e +/-stops] input [output]\n", |
151 |
progname); |
152 |
fprintf(stderr, " Or: %s -r [-g gamma][-e +/-stops] [input [output]]\n", |
153 |
progname); |
154 |
exit(1); |
155 |
} |
156 |
|
157 |
|
158 |
quiterr(err) /* print message and exit */ |
159 |
char *err; |
160 |
{ |
161 |
if (err != NULL) { |
162 |
fprintf(stderr, "%s: %s\n", progname, err); |
163 |
exit(1); |
164 |
} |
165 |
exit(0); |
166 |
} |
167 |
|
168 |
|
169 |
eputs(s) |
170 |
char *s; |
171 |
{ |
172 |
fputs(s, stderr); |
173 |
} |
174 |
|
175 |
|
176 |
quit(code) |
177 |
int code; |
178 |
{ |
179 |
exit(code); |
180 |
} |
181 |
|
182 |
|
183 |
pic * |
184 |
openinput(fname, h) /* open RADIANCE input file */ |
185 |
char *fname; |
186 |
register struct rasterfile *h; |
187 |
{ |
188 |
register pic *p; |
189 |
|
190 |
p = (pic *)emalloc(sizeof(pic)); |
191 |
p->name = fname; |
192 |
if (fname == NULL) |
193 |
p->fp = stdin; |
194 |
else if ((p->fp = fopen(fname, "r")) == NULL) |
195 |
return(NULL); |
196 |
/* check header */ |
197 |
if (checkheader(p->fp, COLRFMT, NULL) < 0 || |
198 |
fgetresolu(&xmax, &ymax, p->fp) != (YMAJOR|YDECR)) |
199 |
quiterr("bad picture format"); |
200 |
p->nexty = 0; |
201 |
p->bytes_line = 0; /* variable length lines */ |
202 |
p->pos.y = (long *)ecalloc(ymax, sizeof(long)); |
203 |
p->pos.y[0] = ftell(p->fp); |
204 |
/* assign header */ |
205 |
h->ras_magic = RAS_MAGIC; |
206 |
h->ras_width = xmax + (xmax&1); /* round to 16 bits */ |
207 |
h->ras_height = ymax; |
208 |
h->ras_depth = 8; |
209 |
h->ras_type = RT_STANDARD; |
210 |
h->ras_length = h->ras_width*h->ras_height; |
211 |
h->ras_maptype = RMT_EQUAL_RGB; |
212 |
h->ras_maplength = 256*3; |
213 |
/* allocate scanline */ |
214 |
inl = (COLR *)emalloc(xmax*sizeof(COLR)); |
215 |
|
216 |
return(p); |
217 |
} |
218 |
|
219 |
|
220 |
pic * |
221 |
openoutput(fname, h) /* open output rasterfile */ |
222 |
char *fname; |
223 |
register struct rasterfile *h; |
224 |
{ |
225 |
register pic *p; |
226 |
|
227 |
p = (pic *)emalloc(sizeof(pic)); |
228 |
p->name = fname; |
229 |
if (fname == NULL) |
230 |
p->fp = stdout; |
231 |
else if ((p->fp = fopen(fname, "w")) == NULL) |
232 |
return(NULL); |
233 |
/* write header */ |
234 |
fwrite((char *)h, sizeof(*h), 1, p->fp); |
235 |
p->nexty = -1; /* needs color map */ |
236 |
p->bytes_line = h->ras_width; |
237 |
p->pos.b = 0; |
238 |
|
239 |
return(p); |
240 |
} |
241 |
|
242 |
|
243 |
pr2ra(h) /* pixrect file to RADIANCE file */ |
244 |
struct rasterfile *h; |
245 |
{ |
246 |
BYTE cmap[3][256]; |
247 |
COLR ctab[256]; |
248 |
COLR *scanline; |
249 |
register int i, j, c; |
250 |
|
251 |
scanline = (COLR *)emalloc(xmax*sizeof(COLR)); |
252 |
/* get color table */ |
253 |
for (i = 0; i < 3; i ++) |
254 |
if (fread((char *)cmap[i], h->ras_maplength/3, 1, stdin) != 1) |
255 |
quiterr("error reading color table"); |
256 |
/* convert table */ |
257 |
for (i = 0; i < h->ras_maplength/3; i++) |
258 |
setcolr(ctab[i], |
259 |
pow((cmap[0][i]+.5)/256.,gamma), |
260 |
pow((cmap[1][i]+.5)/256.,gamma), |
261 |
pow((cmap[2][i]+.5)/256.,gamma)); |
262 |
if (bradj) |
263 |
shiftcolrs(ctab, 256, bradj); |
264 |
/* convert file */ |
265 |
for (i = 0; i < ymax; i++) { |
266 |
for (j = 0; j < xmax; j++) { |
267 |
if ((c = getc(stdin)) == EOF) |
268 |
quiterr("error reading rasterfile"); |
269 |
copycolr(scanline[j], ctab[c]); |
270 |
} |
271 |
if (xmax & 1) /* extra byte */ |
272 |
getc(stdin); |
273 |
if (fwritecolrs(scanline, xmax, stdout) < 0) |
274 |
quiterr("error writing RADIANCE file"); |
275 |
} |
276 |
free((char *)scanline); |
277 |
} |
278 |
|
279 |
|
280 |
picreadline3(y, l3) /* read in 3-byte scanline */ |
281 |
int y; |
282 |
register rgbpixel *l3; |
283 |
{ |
284 |
register int i; |
285 |
|
286 |
if (inpic->nexty != y) { /* find scanline */ |
287 |
if (inpic->bytes_line == 0) { |
288 |
if (inpic->pos.y[y] == 0) { |
289 |
while (inpic->nexty < y) { |
290 |
if (freadcolrs(inl, xmax, inpic->fp) < 0) |
291 |
quiterr("read error in picreadline3"); |
292 |
inpic->pos.y[++inpic->nexty] = ftell(inpic->fp); |
293 |
} |
294 |
} else if (fseek(inpic->fp, inpic->pos.y[y], 0) == EOF) |
295 |
quiterr("seek error in picreadline3"); |
296 |
} else if (fseek(inpic->fp, y*inpic->bytes_line+inpic->pos.b, 0) == EOF) |
297 |
quiterr("seek error in picreadline3"); |
298 |
} else if (inpic->bytes_line == 0 && inpic->pos.y[inpic->nexty] == 0) |
299 |
inpic->pos.y[inpic->nexty] = ftell(inpic->fp); |
300 |
if (freadcolrs(inl, xmax, inpic->fp) < 0) /* read scanline */ |
301 |
quiterr("read error in picreadline3"); |
302 |
inpic->nexty = y+1; |
303 |
/* convert scanline */ |
304 |
normcolrs(inl, xmax, bradj); |
305 |
for (i = 0; i < xmax; i++) { |
306 |
l3[i].r = inl[i][RED]; |
307 |
l3[i].g = inl[i][GRN]; |
308 |
l3[i].b = inl[i][BLU]; |
309 |
} |
310 |
} |
311 |
|
312 |
|
313 |
picwriteline(y, l) /* write out scanline */ |
314 |
int y; |
315 |
register pixel *l; |
316 |
{ |
317 |
if (outpic->nexty != y) { /* seek to scanline */ |
318 |
if (outpic->bytes_line == 0) { |
319 |
if (outpic->pos.y[y] == 0) |
320 |
quiterr("cannot seek in picwriteline"); |
321 |
else if (fseek(outpic->fp, outpic->pos.y[y], 0) == EOF) |
322 |
quiterr("seek error in picwriteline"); |
323 |
} else if (fseek(outpic->fp, y*outpic->bytes_line+outpic->pos.b, 0) == EOF) |
324 |
quiterr("seek error in picwriteline"); |
325 |
} |
326 |
/* write scanline */ |
327 |
if (fwrite((char *)l, sizeof(pixel), xmax, outpic->fp) != xmax) |
328 |
quiterr("write error in picwriteline"); |
329 |
if (xmax&1) /* on 16-bit boundary */ |
330 |
putc(l[xmax-1], outpic->fp); |
331 |
outpic->nexty = y+1; |
332 |
if (outpic->bytes_line == 0 && outpic->pos.y[outpic->nexty] == 0) |
333 |
outpic->pos.y[outpic->nexty] = ftell(outpic->fp); |
334 |
} |
335 |
|
336 |
|
337 |
picwritecm(cm) /* write out color map */ |
338 |
colormap cm; |
339 |
{ |
340 |
register int i, j; |
341 |
|
342 |
if (outpic->nexty != -1 && |
343 |
fseek(outpic->fp, (long)sizeof(struct rasterfile), 0) == EOF) |
344 |
quiterr("seek error in picwritecm"); |
345 |
for (i = 0; i < 3; i++) |
346 |
for (j = 0; j < 256; j++) |
347 |
putc(cm[i][j], outpic->fp); |
348 |
outpic->nexty = 0; |
349 |
if (outpic->bytes_line == 0) |
350 |
outpic->pos.y[0] = ftell(outpic->fp); |
351 |
else |
352 |
outpic->pos.b = ftell(outpic->fp); |
353 |
} |
354 |
|
355 |
|
356 |
picreadcm(map) /* do gamma correction if requested */ |
357 |
colormap map; |
358 |
{ |
359 |
register int i, val; |
360 |
|
361 |
for (i = 0; i < 256; i++) { |
362 |
val = pow((i+0.5)/256.0, 1.0/gamma) * 256.0; |
363 |
map[0][i] = map[1][i] = map[2][i] = val; |
364 |
} |
365 |
} |