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#ifndef lint |
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static const char RCSid[] = "$Id: ra_xyze.c,v 2.16 2025/06/06 19:11:21 greg Exp $"; |
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#endif |
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/* |
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* Program to convert between RADIANCE RGBE and XYZE formats |
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* Added white-balance adjustment 10/01 (GW). |
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*/ |
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|
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#include <math.h> |
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#include "platform.h" |
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#include "color.h" |
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#include "resolu.h" |
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#include "rtio.h" |
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|
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enum {InpUNK, InpRGB, InpXYZ, InpSPEC}; /* input format */ |
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int infmt = InpUNK; |
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int rgbout = 0; /* output should be RGBE? */ |
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RGBPRIMS inprims = STDPRIMS; /* input primaries */ |
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RGBPRIMS outprims = STDPRIMS; /* output primaries */ |
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double expcomp = 1.0; /* exposure compensation */ |
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int doflat = -1; /* produce flat file? */ |
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double origexp = -1.0; /* original exposure */ |
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|
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static gethfunc headline; |
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static void quiterr(char *err); |
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static void myreadscan(COLOR *scn, int len); |
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static void convert(void); |
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|
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|
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|
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static int |
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headline( /* process header line */ |
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char *s, |
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void *p |
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) |
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{ |
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char fmt[MAXFMTLEN]; |
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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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infmt = InpRGB; |
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else if (!strcmp(fmt,CIEFMT)) |
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infmt = InpXYZ; |
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else if (!strcmp(fmt,SPECFMT)) |
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infmt = InpSPEC; |
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else |
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infmt = InpUNK; |
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return(0); /* don't echo */ |
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} |
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if (origexp > 0.0 && isexpos(s)) { |
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origexp *= exposval(s); |
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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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if (iswlsplit(s)) { /* get wavelength limits */ |
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wlsplitval(WLPART, s); |
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return(0); /* don't echo */ |
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} |
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if (isncomp(s)) { /* number of color samples */ |
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NCSAMP = ncompval(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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int |
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main(int argc, char *argv[]) |
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{ |
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int i; |
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|
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SET_DEFAULT_BINARY(); |
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SET_FILE_BINARY(stdin); |
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SET_FILE_BINARY(stdout); |
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fixargv0(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 'o': /* original exposure */ |
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origexp = 1.0; |
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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 (infmt == InpUNK) |
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quiterr("unrecognized/missing input file format"); |
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if (infmt == InpSPEC ? (NCSAMP <= 3) | (NCSAMP > MAXCSAMP) : |
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NCSAMP != 3) |
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quiterr("bad number of color components"); |
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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][-o][-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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static void |
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quiterr( /* print message and exit */ |
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char *err |
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) |
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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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static void |
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myreadscan(COLOR *scn, int len) |
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{ |
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if (infmt == InpSPEC) { /* read & convert to XYZ */ |
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static COLOR *scomp = NULL; |
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SCOLR sclr; |
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SCOLOR scol; |
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COLOR xyz; |
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int n; |
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if (scomp == NULL) { /* initialize conversion */ |
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scomp = (COLOR *)malloc(sizeof(COLOR)*NCSAMP); |
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if (scomp == NULL) |
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quiterr("out of memory in myreadscan"); |
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for (n = NCSAMP; n--; ) |
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spec_cie(scomp[n], |
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WLPART[0] + (WLPART[3] - WLPART[0])*(n+1)/NCSAMP, |
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WLPART[0] + (WLPART[3] - WLPART[0])*n/NCSAMP); |
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} |
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while (len-- > 0) { |
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if (getbinary(sclr, LSCOLR, 1, stdin) != 1) |
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goto readerr; |
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scolr_scolor(scol, sclr); |
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setcolor(*scn, 0, 0, 0); |
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for (n = NCSAMP; n--; ) { |
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copycolor(xyz, scomp[n]); |
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scalecolor(xyz, scol[n]); |
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addcolor(*scn, xyz); |
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} |
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scn++; |
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} |
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return; |
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} /* else read as RGBE/XYZE */ |
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if (freadscan(scn, len, stdin) >= 0) |
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return; |
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readerr: |
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quiterr("error reading input picture"); |
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} |
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|
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|
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static void |
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convert(void) /* 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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COLOR *scanin; |
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COLR *scanout; |
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double exp2do = expcomp; |
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double exp2report = expcomp; |
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int y; |
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int x; |
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/* recover original? */ |
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if (origexp > 0.0) |
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exp2do /= origexp; |
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/* compute transform */ |
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if (rgbout) { |
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if (infmt == InpRGB) { /* RGBE -> RGBE */ |
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comprgb2rgbWBmat(xfm, inprims, outprims); |
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} else { /* XYZE/Spectral -> RGBE */ |
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compxyz2rgbWBmat(xfm, outprims); |
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} |
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if (infmt == InpXYZ) { |
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if (origexp > 0.0) |
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exp2do /= WHTEFFICACY; |
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else |
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exp2report *= WHTEFFICACY; |
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} |
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} else { |
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if (infmt == InpRGB) { /* RGBE -> XYZE */ |
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comprgb2xyzWBmat(xfm, inprims); |
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} else { /* XYZE/Spectral -> XYZE */ |
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memset(xfm, 0, sizeof(xfm)); |
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for (x = 3; x--; ) |
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xfm[x][x] = 1.; |
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} |
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if (infmt != InpXYZ) { |
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if (origexp > 0) |
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exp2do *= WHTEFFICACY; |
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else |
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exp2report /= WHTEFFICACY; |
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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] *= exp2do; |
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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 ((exp2report < 0.99) | (exp2report > 1.01)) |
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fputexpos(exp2report, 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)) : (COLR *)NULL; |
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/* convert image */ |
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for (y = 0; y < ymax; y++) { |
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myreadscan(scanin, xmax); |
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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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putbinary(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(scanin); |
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if (scanout != NULL) |
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free(scanout); |
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} |
