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/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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#endif |
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|
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/* |
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* Program to convert between RADIANCE RGBE and XYZE formats |
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*/ |
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|
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#include <stdio.h> |
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#include <math.h> |
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#include "color.h" |
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#include "resolu.h" |
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|
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#ifdef MSDOS |
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#include <fcntl.h> |
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#endif |
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|
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extern char *malloc(), *strcpy(); |
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|
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int rgbinp = -1; /* input is RGBE? */ |
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|
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int rgbout = 0; /* output should be RGBE? */ |
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|
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RGBPRIMS inprims = STDPRIMS; /* input primaries */ |
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|
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RGBPRIMS outprims = STDPRIMS; /* output primaries */ |
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|
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double expcomp = 1.0; /* exposure compensation */ |
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|
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int doflat = -1; /* produce flat file? */ |
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|
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char *progname; |
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|
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|
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int |
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headline(s) /* process header line */ |
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char *s; |
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{ |
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char fmt[32]; |
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|
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if (formatval(fmt, s)) { /* check if format string */ |
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if (!strcmp(fmt,COLRFMT)) |
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rgbinp = 1; |
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else if (!strcmp(fmt,CIEFMT)) |
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rgbinp = 0; |
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else |
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rgbinp = -2; |
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return(0); /* don't echo */ |
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} |
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if (isprims(s)) { /* get input primaries */ |
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primsval(inprims, s); |
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return(0); /* don't echo */ |
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} |
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/* should I grok colcorr also? */ |
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return(fputs(s, stdout)); |
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} |
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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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int i; |
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#ifdef MSDOS |
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extern int _fmode; |
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_fmode = O_BINARY; |
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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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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 'c': /* rle-compressed output */ |
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doflat = 0; |
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break; |
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case 'u': /* flat output */ |
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doflat = 1; |
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break; |
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case 'r': /* RGBE output */ |
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rgbout = 1; |
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break; |
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case 'p': /* RGB primaries */ |
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if (i+8 >= argc) |
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goto userr; |
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outprims[RED][CIEX] = atof(argv[++i]); |
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outprims[RED][CIEY] = atof(argv[++i]); |
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outprims[GRN][CIEX] = atof(argv[++i]); |
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outprims[GRN][CIEY] = atof(argv[++i]); |
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outprims[BLU][CIEX] = atof(argv[++i]); |
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outprims[BLU][CIEY] = atof(argv[++i]); |
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outprims[WHT][CIEX] = atof(argv[++i]); |
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outprims[WHT][CIEY] = atof(argv[++i]); |
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break; |
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case 'e': /* exposure compensation */ |
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expcomp = atof(argv[++i]); |
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if (argv[i][0] == '+' || argv[i][0] == '-') |
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expcomp = pow(2., expcomp); |
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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 (doflat < 0) |
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doflat = !rgbout; |
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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, "%s: 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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getheader(stdin, headline, NULL); |
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if (rgbinp == -2) |
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quiterr("unrecognized input file format"); |
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if (rgbinp == -1) |
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rgbinp = !rgbout; |
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printargs(argc, argv, stdout); /* add to header */ |
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convert(); /* convert picture */ |
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exit(0); |
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userr: |
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fprintf(stderr, "Usage: %s [-r][-e exp][-c|-u]", progname); |
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fprintf(stderr, "[-p rx ry gx gy bx by wx wy] [input [output]]\n"); |
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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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convert() /* convert to XYZE or RGBE picture */ |
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{ |
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int order; |
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int xmax, ymax; |
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COLORMAT xfm; |
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register COLOR *scanin; |
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register COLR *scanout; |
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double ourexp = expcomp; |
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int y; |
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register int x; |
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/* compute transform */ |
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if (rgbout) { |
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if (rgbinp) { /* RGBE -> RGBE */ |
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comprgb2rgbmat(xfm, inprims, outprims); |
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} else { /* XYZE -> RGBE */ |
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compxyz2rgbmat(xfm, outprims); |
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ourexp *= WHTEFFICACY; |
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} |
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} else { |
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if (rgbinp) { /* RGBE -> XYZE */ |
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comprgb2xyzmat(xfm, inprims); |
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ourexp /= WHTEFFICACY; |
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} else { /* XYZE -> XYZE */ |
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for (y = 0; y < 3; y++) |
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for (x = 0; x < 3; x++) |
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xfm[y][x] = x==y ? 1. : 0.; |
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} |
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} |
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for (y = 0; y < 3; y++) |
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for (x = 0; x < 3; x++) |
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xfm[y][x] *= expcomp; |
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/* get input resolution */ |
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if ((order = fgetresolu(&xmax, &ymax, stdin)) < 0) |
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quiterr("bad picture format"); |
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/* complete output header */ |
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if (ourexp < 0.99 || ourexp > 1.01) |
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fputexpos(ourexp, stdout); |
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if (rgbout) { |
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fputprims(outprims, stdout); |
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fputformat(COLRFMT, stdout); |
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} else |
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fputformat(CIEFMT, stdout); |
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putc('\n', stdout); |
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fputresolu(order, xmax, ymax, stdout); |
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/* allocate scanline */ |
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scanin = (COLOR *)malloc(xmax*sizeof(COLOR)); |
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if (scanin == NULL) |
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quiterr("out of memory in convert"); |
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scanout = doflat ? (COLR *)malloc(xmax*sizeof(COLR)) : NULL; |
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/* convert image */ |
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for (y = 0; y < ymax; y++) { |
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if (freadscan(scanin, xmax, stdin) < 0) |
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quiterr("error reading input picture"); |
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for (x = 0; x < xmax; x++) { |
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colortrans(scanin[x], xfm, scanin[x]); |
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if (rgbout) |
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clipgamut(scanin[x], bright(scanin[x]), |
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CGAMUT_LOWER, cblack, cwhite); |
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} |
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if (scanout != NULL) { |
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for (x = 0; x < xmax; x++) |
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setcolr(scanout[x], colval(scanin[x],RED), |
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colval(scanin[x],GRN), |
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colval(scanin[x],BLU)); |
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fwrite((char *)scanout, sizeof(COLR), xmax, stdout); |
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} else |
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fwritescan(scanin, xmax, stdout); |
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if (ferror(stdout)) |
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quiterr("error writing output picture"); |
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} |
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/* free scanline */ |
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free((char *)scanin); |
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if (scanout != NULL) |
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free((char *)scanout); |
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} |
