1 |
greg |
2.3 |
/* Copyright (c) 1992 Regents of the University of California */ |
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greg |
1.1 |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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/* |
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* program to convert between RADIANCE and Poskanzer Pixmaps |
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*/ |
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#include <stdio.h> |
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greg |
2.3 |
#ifdef MSDOS |
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#include <fcntl.h> |
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#endif |
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greg |
1.1 |
#include <ctype.h> |
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19 |
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#include "color.h" |
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21 |
greg |
1.2 |
#include "resolu.h" |
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23 |
greg |
2.2 |
extern double pow(); |
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greg |
1.1 |
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25 |
greg |
2.3 |
extern char *malloc(); |
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greg |
1.1 |
int agryscan(), bgryscan(), aclrscan(), bclrscan(); |
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int bradj = 0; /* brightness adjustment */ |
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int maxval = 255; /* maximum primary value */ |
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char *progname; |
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int xmax, ymax; |
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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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greg |
2.3 |
char inpbuf[2]; |
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greg |
1.1 |
double gamma = 2.2; |
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int binflag = 1; |
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int reverse = 0; |
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int ptype; |
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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': |
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gamma = atof(argv[++i]); |
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break; |
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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]); |
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break; |
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case 'a': |
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binflag = 0; |
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break; |
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case 'r': |
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reverse = !reverse; |
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break; |
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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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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", |
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progname, argv[i]); |
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exit(1); |
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} |
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if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
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fprintf(stderr, "can't open output \"%s\"\n", |
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progname, argv[i+1]); |
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exit(1); |
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} |
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setcolrgam(gamma); |
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if (reverse) { |
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/* get header */ |
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greg |
2.3 |
if (read(fileno(stdin), inpbuf, 2) != 2 || inpbuf[0] != 'P') |
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greg |
1.1 |
quiterr("input not a Poskanzer Pixmap"); |
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greg |
2.3 |
ptype = inpbuf[1]; |
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#ifdef MSDOS |
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if (ptype > 4) |
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setmode(fileno(stdin), O_BINARY); |
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setmode(fileno(stdout), O_BINARY); |
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#endif |
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greg |
1.1 |
xmax = scanint(stdin); |
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ymax = scanint(stdin); |
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maxval = scanint(stdin); |
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/* put header */ |
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printargs(i, argv, stdout); |
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fputformat(COLRFMT, stdout); |
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putchar('\n'); |
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greg |
1.2 |
fprtresolu(xmax, ymax, stdout); |
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greg |
1.1 |
/* convert file */ |
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switch (ptype) { |
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case '2': |
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ppm2ra(agryscan); |
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break; |
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case '5': |
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ppm2ra(bgryscan); |
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break; |
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case '3': |
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ppm2ra(aclrscan); |
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break; |
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case '6': |
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ppm2ra(bclrscan); |
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break; |
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default: |
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quiterr("unsupported Pixmap type"); |
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} |
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} else { |
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greg |
2.3 |
#ifdef MSDOS |
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setmode(fileno(stdin), O_BINARY); |
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if (binflag) |
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setmode(fileno(stdout), O_BINARY); |
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#endif |
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greg |
1.1 |
/* get header info. */ |
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if (checkheader(stdin, COLRFMT, NULL) < 0 || |
130 |
greg |
1.2 |
fgetresolu(&xmax, &ymax, stdin) < 0) |
131 |
greg |
1.1 |
quiterr("bad picture format"); |
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/* write PPM header */ |
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printf("P%c\n%d %d\n%d\n", binflag ? '6' : '3', |
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xmax, ymax, maxval); |
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/* convert file */ |
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ra2ppm(binflag); |
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} |
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exit(0); |
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userr: |
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fprintf(stderr, |
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"Usage: %s [-r][-a][-g gamma][-e +/-stops] [input [output]]\n", |
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progname); |
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exit(1); |
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} |
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146 |
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147 |
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quiterr(err) /* print message and exit */ |
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char *err; |
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{ |
150 |
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if (err != NULL) { |
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fprintf(stderr, "%s: %s\n", progname, err); |
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exit(1); |
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} |
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exit(0); |
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} |
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157 |
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158 |
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ppm2ra(getscan) /* convert color Pixmap to Radiance picture */ |
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int (*getscan)(); |
160 |
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{ |
161 |
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COLR *scanout; |
162 |
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register int x; |
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int y; |
164 |
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/* allocate scanline */ |
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scanout = (COLR *)malloc(xmax*sizeof(COLR)); |
166 |
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if (scanout == NULL) |
167 |
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quiterr("out of memory in ppm2ra"); |
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/* convert image */ |
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for (y = ymax-1; y >= 0; y--) { |
170 |
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if ((*getscan)(scanout, xmax, stdin) < 0) |
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quiterr("error reading Pixmap"); |
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gambs_colrs(scanout, xmax); |
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if (bradj) |
174 |
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shiftcolrs(scanout, xmax, bradj); |
175 |
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if (fwritecolrs(scanout, xmax, stdout) < 0) |
176 |
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quiterr("error writing Radiance picture"); |
177 |
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} |
178 |
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/* free scanline */ |
179 |
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free((char *)scanout); |
180 |
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} |
181 |
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182 |
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183 |
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ra2ppm(binary) /* convert Radiance picture to Pixmap */ |
184 |
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int binary; |
185 |
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{ |
186 |
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COLR *scanin; |
187 |
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register int x; |
188 |
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int y; |
189 |
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/* allocate scanline */ |
190 |
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scanin = (COLR *)malloc(xmax*sizeof(COLR)); |
191 |
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if (scanin == NULL) |
192 |
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quiterr("out of memory in ra2pr"); |
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/* convert image */ |
194 |
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for (y = ymax-1; y >= 0; y--) { |
195 |
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if (freadcolrs(scanin, xmax, stdin) < 0) |
196 |
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quiterr("error reading Radiance picture"); |
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if (bradj) |
198 |
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shiftcolrs(scanin, xmax, bradj); |
199 |
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colrs_gambs(scanin, xmax); |
200 |
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if (binary) |
201 |
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for (x = 0; x < xmax; x++) { |
202 |
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putc(scanin[x][RED], stdout); |
203 |
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putc(scanin[x][GRN], stdout); |
204 |
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putc(scanin[x][BLU], stdout); |
205 |
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} |
206 |
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else |
207 |
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for (x = 0; x < xmax; x++) |
208 |
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printf("%d %d %d\n", scanin[x][RED], |
209 |
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scanin[x][GRN], |
210 |
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scanin[x][BLU]); |
211 |
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if (ferror(stdout)) |
212 |
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quiterr("error writing Pixmap"); |
213 |
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} |
214 |
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/* free scanline */ |
215 |
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free((char *)scanin); |
216 |
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} |
217 |
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218 |
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219 |
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agryscan(scan, len, fp) /* get an ASCII greyscale scanline */ |
220 |
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register COLR *scan; |
221 |
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register int len; |
222 |
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FILE *fp; |
223 |
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{ |
224 |
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while (len-- > 0) { |
225 |
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scan[0][RED] = |
226 |
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scan[0][GRN] = |
227 |
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scan[0][BLU] = normval(scanint(fp)); |
228 |
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scan++; |
229 |
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} |
230 |
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return(0); |
231 |
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} |
232 |
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233 |
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234 |
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bgryscan(scan, len, fp) /* get a binary greyscale scanline */ |
235 |
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register COLR *scan; |
236 |
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int len; |
237 |
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register FILE *fp; |
238 |
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{ |
239 |
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register int c; |
240 |
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241 |
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while (len-- > 0) { |
242 |
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if ((c = getc(fp)) == EOF) |
243 |
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return(-1); |
244 |
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if (maxval != 255) |
245 |
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c = normval(c); |
246 |
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scan[0][RED] = |
247 |
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scan[0][GRN] = |
248 |
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scan[0][BLU] = c; |
249 |
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scan++; |
250 |
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} |
251 |
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return(0); |
252 |
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} |
253 |
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254 |
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255 |
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aclrscan(scan, len, fp) /* get an ASCII color scanline */ |
256 |
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register COLR *scan; |
257 |
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register int len; |
258 |
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FILE *fp; |
259 |
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{ |
260 |
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while (len-- > 0) { |
261 |
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scan[0][RED] = normval(scanint(fp)); |
262 |
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scan[0][GRN] = normval(scanint(fp)); |
263 |
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scan[0][BLU] = normval(scanint(fp)); |
264 |
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scan++; |
265 |
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} |
266 |
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return(0); |
267 |
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} |
268 |
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269 |
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270 |
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bclrscan(scan, len, fp) /* get a binary color scanline */ |
271 |
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register COLR *scan; |
272 |
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int len; |
273 |
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register FILE *fp; |
274 |
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{ |
275 |
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int r, g, b; |
276 |
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277 |
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while (len-- > 0) { |
278 |
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r = getc(fp); |
279 |
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g = getc(fp); |
280 |
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if ((b = getc(fp)) == EOF) |
281 |
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return(-1); |
282 |
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if (maxval == 255) { |
283 |
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scan[0][RED] = r; |
284 |
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scan[0][GRN] = g; |
285 |
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scan[0][BLU] = b; |
286 |
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} else { |
287 |
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scan[0][RED] = normval(r); |
288 |
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scan[0][GRN] = normval(g); |
289 |
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scan[0][BLU] = normval(b); |
290 |
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} |
291 |
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scan++; |
292 |
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} |
293 |
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return(0); |
294 |
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} |
295 |
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296 |
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297 |
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int |
298 |
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scanint(fp) /* scan the next positive integer value */ |
299 |
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register FILE *fp; |
300 |
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{ |
301 |
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register int i, c; |
302 |
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tryagain: |
303 |
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while (isspace(c = getc(fp))) |
304 |
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; |
305 |
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if (c == EOF) |
306 |
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quiterr("unexpected end of file"); |
307 |
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if (c == '#') { /* comment */ |
308 |
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while ((c = getc(fp)) != EOF && c != '\n') |
309 |
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; |
310 |
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goto tryagain; |
311 |
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} |
312 |
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/* should be integer */ |
313 |
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i = 0; |
314 |
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do { |
315 |
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if (!isdigit(c)) |
316 |
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quiterr("error reading integer"); |
317 |
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i = 10*i + c - '0'; |
318 |
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c = getc(fp); |
319 |
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} while (c != EOF && !isspace(c)); |
320 |
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return(i); |
321 |
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} |
322 |
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323 |
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324 |
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int |
325 |
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normval(v) /* normalize a value to [0,255] */ |
326 |
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register int v; |
327 |
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{ |
328 |
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if (v >= maxval) |
329 |
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return(255); |
330 |
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if (maxval == 255) |
331 |
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return(v); |
332 |
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return(v*255L/maxval); |
333 |
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} |