1 |
greg |
2.1 |
#ifndef lint |
2 |
schorsch |
2.13 |
static const char RCSid[] = "$Id: ra_skel.c,v 2.12 2003/06/05 19:29:34 schorsch Exp $"; |
3 |
greg |
2.1 |
#endif |
4 |
greg |
2.4 |
/* |
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* Skeletal 24-bit image conversion program. Replace "skel" |
6 |
greg |
2.1 |
* in this file with a more appropriate image type identifier. |
7 |
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* |
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greg |
2.10 |
* The Rmakefile entry should look something like this: |
9 |
greg |
2.1 |
* ra_skel: ra_skel.o |
10 |
schorsch |
2.13 |
* cc $(CFLAGS) -o ra_skel ra_skel.o -lrtrad -lm |
11 |
greg |
2.1 |
* ra_skel.o: ../common/color.h ../common/resolu.h |
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* |
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* If you like to do things the hard way, you can link directly |
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* to the object files "color.o colrops.o resolu.o header.o" in |
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schorsch |
2.13 |
* the common subdirectory instead of using the -lrtrad library. |
16 |
greg |
2.1 |
*/ |
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18 |
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#include <stdio.h> |
19 |
greg |
2.5 |
#include <math.h> |
20 |
greg |
2.11 |
#include <time.h> |
21 |
schorsch |
2.12 |
|
22 |
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#include "platform.h" |
23 |
greg |
2.1 |
#include "color.h" |
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#include "resolu.h" |
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greg |
2.6 |
double gamcor = 2.2; /* gamma correction */ |
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greg |
2.1 |
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28 |
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int bradj = 0; /* brightness adjustment */ |
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char *progname; |
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32 |
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int xmax, ymax; |
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34 |
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35 |
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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int reverse = 0; |
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int i; |
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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 'g': /* gamma correction */ |
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greg |
2.6 |
gamcor = atof(argv[++i]); |
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greg |
2.1 |
break; |
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case 'e': /* exposure adjustment */ |
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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]); |
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break; |
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case 'r': /* reverse conversion */ |
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reverse = 1; |
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break; |
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default: |
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goto userr; |
60 |
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} |
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else |
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break; |
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if (i < argc-2) |
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goto userr; |
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if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
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fprintf(stderr, "%s: can't open input \"%s\"\n", |
68 |
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progname, argv[i]); |
69 |
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exit(1); |
70 |
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} |
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if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
72 |
greg |
2.8 |
fprintf(stderr, "%s: can't open output \"%s\"\n", |
73 |
greg |
2.1 |
progname, argv[i+1]); |
74 |
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exit(1); |
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} |
76 |
schorsch |
2.12 |
SET_FILE_BINARY(stdin); |
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SET_FILE_BINARY(stdout); |
78 |
greg |
2.6 |
setcolrgam(gamcor); /* set up gamma correction */ |
79 |
greg |
2.1 |
if (reverse) { |
80 |
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/* get their image resolution */ |
81 |
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read_skel_head(&xmax, &ymax); |
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/* put our header */ |
83 |
greg |
2.9 |
newheader("RADIANCE", stdout); |
84 |
greg |
2.1 |
printargs(i, argv, stdout); |
85 |
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fputformat(COLRFMT, stdout); |
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putchar('\n'); |
87 |
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fprtresolu(xmax, ymax, stdout); |
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/* convert file */ |
89 |
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skel2ra(); |
90 |
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} else { |
91 |
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/* get our header */ |
92 |
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if (checkheader(stdin, COLRFMT, NULL) < 0 || |
93 |
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fgetresolu(&xmax, &ymax, stdin) < 0) |
94 |
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quiterr("bad picture format"); |
95 |
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/* write their header */ |
96 |
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write_skel_head(xmax, ymax); |
97 |
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/* convert file */ |
98 |
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ra2skel(); |
99 |
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} |
100 |
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exit(0); |
101 |
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userr: |
102 |
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fprintf(stderr, |
103 |
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"Usage: %s [-r][-g gamma][-e +/-stops] [input [output]]\n", |
104 |
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progname); |
105 |
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exit(1); |
106 |
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} |
107 |
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108 |
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109 |
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quiterr(err) /* print message and exit */ |
110 |
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char *err; |
111 |
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{ |
112 |
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if (err != NULL) { |
113 |
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fprintf(stderr, "%s: %s\n", progname, err); |
114 |
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exit(1); |
115 |
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} |
116 |
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exit(0); |
117 |
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} |
118 |
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119 |
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120 |
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skel2ra() /* convert 24-bit scanlines to Radiance picture */ |
121 |
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{ |
122 |
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COLR *scanout; |
123 |
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register int x; |
124 |
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int y; |
125 |
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/* allocate scanline */ |
126 |
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scanout = (COLR *)malloc(xmax*sizeof(COLR)); |
127 |
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if (scanout == NULL) |
128 |
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quiterr("out of memory in skel2ra"); |
129 |
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/* convert image */ |
130 |
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for (y = ymax-1; y >= 0; y--) { |
131 |
greg |
2.7 |
for (x = 0; x < xmax; x++) { |
132 |
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scanout[x][RED] = getc(stdin); |
133 |
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scanout[x][GRN] = getc(stdin); |
134 |
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scanout[x][BLU] = getc(stdin); |
135 |
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} |
136 |
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if (feof(stdin) | ferror(stdin)) |
137 |
greg |
2.1 |
quiterr("error reading skel image"); |
138 |
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/* undo gamma */ |
139 |
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gambs_colrs(scanout, xmax); |
140 |
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if (bradj) /* adjust exposure */ |
141 |
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shiftcolrs(scanout, xmax, bradj); |
142 |
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if (fwritecolrs(scanout, xmax, stdout) < 0) |
143 |
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quiterr("error writing Radiance picture"); |
144 |
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} |
145 |
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/* free scanline */ |
146 |
greg |
2.11 |
free((void *)scanout); |
147 |
greg |
2.1 |
} |
148 |
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149 |
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150 |
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ra2skel() /* convert Radiance scanlines to 24-bit */ |
151 |
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{ |
152 |
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COLR *scanin; |
153 |
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register int x; |
154 |
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int y; |
155 |
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/* allocate scanline */ |
156 |
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scanin = (COLR *)malloc(xmax*sizeof(COLR)); |
157 |
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if (scanin == NULL) |
158 |
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quiterr("out of memory in ra2skel"); |
159 |
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/* convert image */ |
160 |
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for (y = ymax-1; y >= 0; y--) { |
161 |
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if (freadcolrs(scanin, xmax, stdin) < 0) |
162 |
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quiterr("error reading Radiance picture"); |
163 |
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if (bradj) /* adjust exposure */ |
164 |
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shiftcolrs(scanin, xmax, bradj); |
165 |
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colrs_gambs(scanin, xmax); /* gamma correction */ |
166 |
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for (x = 0; x < xmax; x++) { |
167 |
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putc(scanin[x][RED], stdout); |
168 |
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putc(scanin[x][GRN], stdout); |
169 |
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putc(scanin[x][BLU], stdout); |
170 |
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} |
171 |
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if (ferror(stdout)) |
172 |
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quiterr("error writing skel file"); |
173 |
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} |
174 |
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/* free scanline */ |
175 |
greg |
2.11 |
free((void *)scanin); |
176 |
greg |
2.1 |
} |