1 |
greg |
1.11 |
/* Copyright (c) 1991 Regents of the University of California */ |
2 |
greg |
1.1 |
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3 |
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#ifndef lint |
4 |
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static char SCCSid[] = "$SunId$ LBL"; |
5 |
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#endif |
6 |
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7 |
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/* |
8 |
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* ra_pr.c - program to convert between RADIANCE and pixrect picture format. |
9 |
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* |
10 |
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* 11/10/87 |
11 |
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* 3/1/88 Added Paul Heckbert's color map allocation |
12 |
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*/ |
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#include <stdio.h> |
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16 |
greg |
1.2 |
#include "rasterfile.h" |
17 |
greg |
1.1 |
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18 |
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#include "color.h" |
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20 |
greg |
1.13 |
#include "resolu.h" |
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22 |
greg |
1.1 |
#include "pic.h" |
23 |
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24 |
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/* descriptor for a picture file or frame buffer */ |
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typedef struct { |
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char *name; /* file name */ |
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FILE *fp; /* file pointer */ |
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int nexty; /* file positioning */ |
29 |
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int bytes_line; /* 0 == variable length lines */ |
30 |
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union { |
31 |
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long b; /* initial scanline */ |
32 |
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long *y; /* individual scanline */ |
33 |
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} pos; /* position(s) */ |
34 |
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} pic; |
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36 |
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extern pic *openinput(), *openoutput(); |
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38 |
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extern char *ecalloc(), *emalloc(); |
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40 |
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extern long ftell(); |
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42 |
greg |
2.2 |
extern double pow(); |
43 |
greg |
1.1 |
|
44 |
greg |
1.12 |
double gamma = 2.2; /* gamma correction */ |
45 |
greg |
1.1 |
|
46 |
greg |
1.11 |
int bradj = 0; /* brightness adjustment */ |
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48 |
greg |
1.1 |
pic *inpic, *outpic; |
49 |
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50 |
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char *progname; |
51 |
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52 |
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char errmsg[128]; |
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54 |
greg |
1.8 |
COLR *inl; |
55 |
greg |
1.1 |
|
56 |
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int xmax, ymax; |
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58 |
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59 |
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
63 |
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colormap rasmap; |
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struct rasterfile head; |
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int dither = 1; |
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int reverse = 0; |
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int ncolors = 256; |
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int greyscale = 0; |
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int i; |
70 |
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71 |
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progname = argv[0]; |
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for (i = 1; i < argc; i++) |
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if (argv[i][0] == '-') |
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switch (argv[i][1]) { |
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case 'd': |
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dither = !dither; |
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break; |
79 |
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case 'g': |
80 |
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gamma = atof(argv[++i]); |
81 |
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break; |
82 |
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case 'b': |
83 |
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greyscale = !greyscale; |
84 |
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break; |
85 |
greg |
1.11 |
case 'e': |
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if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
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goto userr; |
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bradj = atoi(argv[++i]); |
89 |
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break; |
90 |
greg |
1.1 |
case 'r': |
91 |
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reverse = !reverse; |
92 |
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break; |
93 |
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case 'c': |
94 |
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ncolors = atoi(argv[++i]); |
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break; |
96 |
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default: |
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goto userr; |
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} |
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else |
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break; |
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102 |
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if (reverse) { |
103 |
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if (i < argc-2) |
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goto userr; |
105 |
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if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
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sprintf(errmsg, "can't open input \"%s\"", argv[i]); |
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quiterr(errmsg); |
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} |
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if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
110 |
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sprintf(errmsg, "can't open output \"%s\"", argv[i+1]); |
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quiterr(errmsg); |
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} |
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/* get header */ |
114 |
greg |
1.5 |
if (fread((char *)&head, sizeof(head), 1, stdin) != 1) |
115 |
greg |
1.1 |
quiterr("missing header"); |
116 |
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if (head.ras_magic != RAS_MAGIC) |
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quiterr("bad raster format"); |
118 |
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xmax = head.ras_width; |
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ymax = head.ras_height; |
120 |
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if (head.ras_type != RT_STANDARD || |
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head.ras_maptype != RMT_EQUAL_RGB || |
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head.ras_depth != 8) |
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quiterr("incompatible format"); |
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/* put header */ |
125 |
greg |
1.7 |
printargs(i, argv, stdout); |
126 |
greg |
1.10 |
fputformat(COLRFMT, stdout); |
127 |
greg |
1.1 |
putchar('\n'); |
128 |
greg |
1.13 |
fprtresolu(xmax, ymax, stdout); |
129 |
greg |
1.1 |
/* convert file */ |
130 |
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pr2ra(&head); |
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} else { |
132 |
greg |
1.11 |
if (i < argc-2 || (!greyscale && i > argc-1)) |
133 |
greg |
1.1 |
goto userr; |
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if ((inpic = openinput(argv[i], &head)) == NULL) { |
135 |
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sprintf(errmsg, "can't open input \"%s\"", argv[i]); |
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quiterr(errmsg); |
137 |
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} |
138 |
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if ((outpic = openoutput(i==argc-2 ? argv[i+1] : (char *)NULL, |
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&head)) == NULL) { |
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sprintf(errmsg, "can't open output \"%s\"", argv[i+1]); |
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quiterr(errmsg); |
142 |
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} |
143 |
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/* convert file */ |
144 |
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if (greyscale) |
145 |
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biq(dither,ncolors,1,rasmap); |
146 |
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else |
147 |
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ciq(dither,ncolors,1,rasmap); |
148 |
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} |
149 |
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quiterr(NULL); |
150 |
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userr: |
151 |
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fprintf(stderr, |
152 |
greg |
1.11 |
"Usage: %s [-d][-c ncolors][-b][-g gamma][-e +/-stops] input [output]\n", |
153 |
greg |
1.1 |
progname); |
154 |
greg |
1.11 |
fprintf(stderr, " Or: %s -r [-g gamma][-e +/-stops] [input [output]]\n", |
155 |
greg |
1.1 |
progname); |
156 |
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exit(1); |
157 |
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} |
158 |
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159 |
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160 |
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quiterr(err) /* print message and exit */ |
161 |
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char *err; |
162 |
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{ |
163 |
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if (err != NULL) { |
164 |
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fprintf(stderr, "%s: %s\n", progname, err); |
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exit(1); |
166 |
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} |
167 |
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exit(0); |
168 |
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} |
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170 |
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171 |
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eputs(s) |
172 |
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char *s; |
173 |
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{ |
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fputs(s, stderr); |
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} |
176 |
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177 |
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178 |
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quit(code) |
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int code; |
180 |
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{ |
181 |
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exit(code); |
182 |
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} |
183 |
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184 |
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185 |
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pic * |
186 |
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openinput(fname, h) /* open RADIANCE input file */ |
187 |
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char *fname; |
188 |
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register struct rasterfile *h; |
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{ |
190 |
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register pic *p; |
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192 |
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p = (pic *)emalloc(sizeof(pic)); |
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p->name = fname; |
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if (fname == NULL) |
195 |
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p->fp = stdin; |
196 |
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else if ((p->fp = fopen(fname, "r")) == NULL) |
197 |
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return(NULL); |
198 |
greg |
1.10 |
/* check header */ |
199 |
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if (checkheader(p->fp, COLRFMT, NULL) < 0 || |
200 |
greg |
1.13 |
fgetresolu(&xmax, &ymax, p->fp) < 0) |
201 |
greg |
1.10 |
quiterr("bad picture format"); |
202 |
greg |
1.1 |
p->nexty = 0; |
203 |
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p->bytes_line = 0; /* variable length lines */ |
204 |
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p->pos.y = (long *)ecalloc(ymax, sizeof(long)); |
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p->pos.y[0] = ftell(p->fp); |
206 |
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/* assign header */ |
207 |
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h->ras_magic = RAS_MAGIC; |
208 |
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h->ras_width = xmax + (xmax&1); /* round to 16 bits */ |
209 |
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h->ras_height = ymax; |
210 |
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h->ras_depth = 8; |
211 |
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h->ras_type = RT_STANDARD; |
212 |
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h->ras_length = h->ras_width*h->ras_height; |
213 |
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h->ras_maptype = RMT_EQUAL_RGB; |
214 |
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h->ras_maplength = 256*3; |
215 |
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/* allocate scanline */ |
216 |
greg |
1.8 |
inl = (COLR *)emalloc(xmax*sizeof(COLR)); |
217 |
greg |
1.1 |
|
218 |
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return(p); |
219 |
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} |
220 |
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221 |
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222 |
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pic * |
223 |
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openoutput(fname, h) /* open output rasterfile */ |
224 |
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char *fname; |
225 |
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register struct rasterfile *h; |
226 |
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{ |
227 |
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register pic *p; |
228 |
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229 |
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p = (pic *)emalloc(sizeof(pic)); |
230 |
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p->name = fname; |
231 |
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if (fname == NULL) |
232 |
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p->fp = stdout; |
233 |
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else if ((p->fp = fopen(fname, "w")) == NULL) |
234 |
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return(NULL); |
235 |
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/* write header */ |
236 |
greg |
1.5 |
fwrite((char *)h, sizeof(*h), 1, p->fp); |
237 |
greg |
1.1 |
p->nexty = -1; /* needs color map */ |
238 |
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p->bytes_line = h->ras_width; |
239 |
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p->pos.b = 0; |
240 |
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241 |
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return(p); |
242 |
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} |
243 |
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244 |
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245 |
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pr2ra(h) /* pixrect file to RADIANCE file */ |
246 |
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struct rasterfile *h; |
247 |
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{ |
248 |
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BYTE cmap[3][256]; |
249 |
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COLR ctab[256]; |
250 |
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COLR *scanline; |
251 |
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register int i, j, c; |
252 |
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253 |
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scanline = (COLR *)emalloc(xmax*sizeof(COLR)); |
254 |
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/* get color table */ |
255 |
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for (i = 0; i < 3; i ++) |
256 |
greg |
1.5 |
if (fread((char *)cmap[i], h->ras_maplength/3, 1, stdin) != 1) |
257 |
greg |
1.1 |
quiterr("error reading color table"); |
258 |
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/* convert table */ |
259 |
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for (i = 0; i < h->ras_maplength/3; i++) |
260 |
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setcolr(ctab[i], |
261 |
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pow((cmap[0][i]+.5)/256.,gamma), |
262 |
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pow((cmap[1][i]+.5)/256.,gamma), |
263 |
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pow((cmap[2][i]+.5)/256.,gamma)); |
264 |
greg |
1.11 |
if (bradj) |
265 |
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shiftcolrs(ctab, 256, bradj); |
266 |
greg |
1.1 |
/* convert file */ |
267 |
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for (i = 0; i < ymax; i++) { |
268 |
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for (j = 0; j < xmax; j++) { |
269 |
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if ((c = getc(stdin)) == EOF) |
270 |
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quiterr("error reading rasterfile"); |
271 |
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copycolr(scanline[j], ctab[c]); |
272 |
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} |
273 |
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if (xmax & 1) /* extra byte */ |
274 |
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getc(stdin); |
275 |
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if (fwritecolrs(scanline, xmax, stdout) < 0) |
276 |
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quiterr("error writing RADIANCE file"); |
277 |
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} |
278 |
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free((char *)scanline); |
279 |
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} |
280 |
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281 |
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282 |
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picreadline3(y, l3) /* read in 3-byte scanline */ |
283 |
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int y; |
284 |
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register rgbpixel *l3; |
285 |
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{ |
286 |
greg |
1.4 |
register int i; |
287 |
greg |
1.1 |
|
288 |
greg |
1.4 |
if (inpic->nexty != y) { /* find scanline */ |
289 |
greg |
1.1 |
if (inpic->bytes_line == 0) { |
290 |
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if (inpic->pos.y[y] == 0) { |
291 |
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while (inpic->nexty < y) { |
292 |
greg |
1.8 |
if (freadcolrs(inl, xmax, inpic->fp) < 0) |
293 |
greg |
1.1 |
quiterr("read error in picreadline3"); |
294 |
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inpic->pos.y[++inpic->nexty] = ftell(inpic->fp); |
295 |
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} |
296 |
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} else if (fseek(inpic->fp, inpic->pos.y[y], 0) == EOF) |
297 |
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quiterr("seek error in picreadline3"); |
298 |
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} else if (fseek(inpic->fp, y*inpic->bytes_line+inpic->pos.b, 0) == EOF) |
299 |
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quiterr("seek error in picreadline3"); |
300 |
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} else if (inpic->bytes_line == 0 && inpic->pos.y[inpic->nexty] == 0) |
301 |
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inpic->pos.y[inpic->nexty] = ftell(inpic->fp); |
302 |
greg |
1.8 |
if (freadcolrs(inl, xmax, inpic->fp) < 0) /* read scanline */ |
303 |
greg |
1.1 |
quiterr("read error in picreadline3"); |
304 |
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inpic->nexty = y+1; |
305 |
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/* convert scanline */ |
306 |
greg |
1.11 |
normcolrs(inl, xmax, bradj); |
307 |
greg |
1.4 |
for (i = 0; i < xmax; i++) { |
308 |
greg |
1.8 |
l3[i].r = inl[i][RED]; |
309 |
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l3[i].g = inl[i][GRN]; |
310 |
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l3[i].b = inl[i][BLU]; |
311 |
greg |
1.1 |
} |
312 |
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} |
313 |
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314 |
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315 |
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picwriteline(y, l) /* write out scanline */ |
316 |
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int y; |
317 |
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register pixel *l; |
318 |
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{ |
319 |
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if (outpic->nexty != y) { /* seek to scanline */ |
320 |
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if (outpic->bytes_line == 0) { |
321 |
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if (outpic->pos.y[y] == 0) |
322 |
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quiterr("cannot seek in picwriteline"); |
323 |
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else if (fseek(outpic->fp, outpic->pos.y[y], 0) == EOF) |
324 |
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quiterr("seek error in picwriteline"); |
325 |
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} else if (fseek(outpic->fp, y*outpic->bytes_line+outpic->pos.b, 0) == EOF) |
326 |
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quiterr("seek error in picwriteline"); |
327 |
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} |
328 |
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/* write scanline */ |
329 |
greg |
1.5 |
if (fwrite((char *)l, sizeof(pixel), xmax, outpic->fp) != xmax) |
330 |
greg |
1.1 |
quiterr("write error in picwriteline"); |
331 |
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if (xmax&1) /* on 16-bit boundary */ |
332 |
|
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putc(l[xmax-1], outpic->fp); |
333 |
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outpic->nexty = y+1; |
334 |
|
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if (outpic->bytes_line == 0 && outpic->pos.y[outpic->nexty] == 0) |
335 |
|
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outpic->pos.y[outpic->nexty] = ftell(outpic->fp); |
336 |
|
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} |
337 |
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338 |
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339 |
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picwritecm(cm) /* write out color map */ |
340 |
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colormap cm; |
341 |
|
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{ |
342 |
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register int i, j; |
343 |
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|
344 |
|
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if (outpic->nexty != -1 && |
345 |
|
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fseek(outpic->fp, (long)sizeof(struct rasterfile), 0) == EOF) |
346 |
|
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quiterr("seek error in picwritecm"); |
347 |
|
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for (i = 0; i < 3; i++) |
348 |
|
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for (j = 0; j < 256; j++) |
349 |
|
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putc(cm[i][j], outpic->fp); |
350 |
|
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outpic->nexty = 0; |
351 |
|
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if (outpic->bytes_line == 0) |
352 |
|
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outpic->pos.y[0] = ftell(outpic->fp); |
353 |
|
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else |
354 |
|
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outpic->pos.b = ftell(outpic->fp); |
355 |
|
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} |
356 |
|
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357 |
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358 |
|
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picreadcm(map) /* do gamma correction if requested */ |
359 |
|
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colormap map; |
360 |
|
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{ |
361 |
|
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register int i, val; |
362 |
|
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|
363 |
|
|
for (i = 0; i < 256; i++) { |
364 |
greg |
1.9 |
val = pow((i+0.5)/256.0, 1.0/gamma) * 256.0; |
365 |
greg |
1.1 |
map[0][i] = map[1][i] = map[2][i] = val; |
366 |
|
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} |
367 |
|
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} |