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/* Copyright (c) 1991 Regents of the University of California */ |
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|
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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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/* |
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* program to convert between RADIANCE and Poskanzer Pixmaps |
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*/ |
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|
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#include <stdio.h> |
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|
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#include <ctype.h> |
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|
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#include "color.h" |
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|
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extern double atof(), pow(); |
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|
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int agryscan(), bgryscan(), aclrscan(), bclrscan(); |
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|
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int bradj = 0; /* brightness adjustment */ |
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|
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int maxval = 255; /* maximum primary value */ |
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|
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char *progname; |
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|
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int xmax, ymax; |
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|
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|
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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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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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|
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progname = argv[0]; |
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|
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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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|
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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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if (getc(stdin) != 'P') |
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quiterr("input not a Poskanzer Pixmap"); |
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ptype = getc(stdin); |
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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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fputresolu(YMAJOR|YDECR, xmax, ymax, stdout); |
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/* 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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/* get header info. */ |
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if (checkheader(stdin, COLRFMT, NULL) < 0 || |
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fgetresolu(&xmax, &ymax, stdin) != (YMAJOR|YDECR)) |
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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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|
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|
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quiterr(err) /* print message and exit */ |
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char *err; |
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{ |
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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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|
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|
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ppm2ra(getscan) /* convert color Pixmap to Radiance picture */ |
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int (*getscan)(); |
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{ |
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COLR *scanout; |
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register int x; |
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int y; |
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/* allocate scanline */ |
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scanout = (COLR *)malloc(xmax*sizeof(COLR)); |
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if (scanout == NULL) |
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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--) { |
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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) |
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shiftcolrs(scanout, xmax, bradj); |
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if (fwritecolrs(scanout, xmax, stdout) < 0) |
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quiterr("error writing Radiance picture"); |
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} |
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/* free scanline */ |
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free((char *)scanout); |
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} |
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|
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|
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ra2ppm(binary) /* convert Radiance picture to Pixmap */ |
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int binary; |
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{ |
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COLR *scanin; |
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register int x; |
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int y; |
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/* allocate scanline */ |
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scanin = (COLR *)malloc(xmax*sizeof(COLR)); |
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if (scanin == NULL) |
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quiterr("out of memory in ra2pr"); |
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/* convert image */ |
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for (y = ymax-1; y >= 0; y--) { |
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if (freadcolrs(scanin, xmax, stdin) < 0) |
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quiterr("error reading Radiance picture"); |
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if (bradj) |
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shiftcolrs(scanin, xmax, bradj); |
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colrs_gambs(scanin, xmax); |
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if (binary) |
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for (x = 0; x < xmax; x++) { |
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putc(scanin[x][RED], stdout); |
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putc(scanin[x][GRN], stdout); |
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putc(scanin[x][BLU], stdout); |
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} |
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else |
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for (x = 0; x < xmax; x++) |
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printf("%d %d %d\n", scanin[x][RED], |
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scanin[x][GRN], |
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scanin[x][BLU]); |
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if (ferror(stdout)) |
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quiterr("error writing Pixmap"); |
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} |
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/* free scanline */ |
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free((char *)scanin); |
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} |
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|
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|
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agryscan(scan, len, fp) /* get an ASCII greyscale scanline */ |
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register COLR *scan; |
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register int len; |
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FILE *fp; |
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{ |
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while (len-- > 0) { |
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scan[0][RED] = |
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scan[0][GRN] = |
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scan[0][BLU] = normval(scanint(fp)); |
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scan++; |
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} |
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return(0); |
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} |
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|
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|
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bgryscan(scan, len, fp) /* get a binary greyscale scanline */ |
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register COLR *scan; |
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int len; |
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register FILE *fp; |
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{ |
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register int c; |
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|
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while (len-- > 0) { |
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if ((c = getc(fp)) == EOF) |
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return(-1); |
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if (maxval != 255) |
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c = normval(c); |
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scan[0][RED] = |
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scan[0][GRN] = |
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scan[0][BLU] = c; |
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scan++; |
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} |
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return(0); |
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} |
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|
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|
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aclrscan(scan, len, fp) /* get an ASCII color scanline */ |
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register COLR *scan; |
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register int len; |
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FILE *fp; |
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{ |
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while (len-- > 0) { |
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scan[0][RED] = normval(scanint(fp)); |
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scan[0][GRN] = normval(scanint(fp)); |
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scan[0][BLU] = normval(scanint(fp)); |
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scan++; |
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} |
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return(0); |
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} |
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|
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|
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bclrscan(scan, len, fp) /* get a binary color scanline */ |
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register COLR *scan; |
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int len; |
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register FILE *fp; |
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{ |
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int r, g, b; |
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|
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while (len-- > 0) { |
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r = getc(fp); |
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g = getc(fp); |
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if ((b = getc(fp)) == EOF) |
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return(-1); |
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if (maxval == 255) { |
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scan[0][RED] = r; |
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scan[0][GRN] = g; |
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scan[0][BLU] = b; |
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} else { |
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scan[0][RED] = normval(r); |
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scan[0][GRN] = normval(g); |
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scan[0][BLU] = normval(b); |
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} |
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scan++; |
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} |
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return(0); |
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} |
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|
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|
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int |
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scanint(fp) /* scan the next positive integer value */ |
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register FILE *fp; |
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{ |
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register int i, c; |
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tryagain: |
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while (isspace(c = getc(fp))) |
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; |
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if (c == EOF) |
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quiterr("unexpected end of file"); |
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if (c == '#') { /* comment */ |
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while ((c = getc(fp)) != EOF && c != '\n') |
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; |
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goto tryagain; |
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} |
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/* should be integer */ |
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i = 0; |
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do { |
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if (!isdigit(c)) |
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quiterr("error reading integer"); |
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i = 10*i + c - '0'; |
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c = getc(fp); |
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} while (c != EOF && !isspace(c)); |
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return(i); |
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} |
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|
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|
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int |
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normval(v) /* normalize a value to [0,255] */ |
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register int v; |
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{ |
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if (v >= maxval) |
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return(255); |
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if (maxval == 255) |
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return(v); |
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return(v*255L/maxval); |
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} |
