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#ifndef lint |
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static const char RCSid[] = "$Id: pcwarp.c,v 3.6 2018/08/02 18:33:44 greg Exp $"; |
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#endif |
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/* |
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* Warp colors in Radiance picture to correct for input/output changes. |
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*/ |
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|
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#include "rtio.h" |
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#include "resolu.h" |
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#include "color.h" |
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#include "warp3d.h" |
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|
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char *progname; /* global argv[0] */ |
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|
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FILE *infp = NULL; /* input stream */ |
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int xres, yres; /* input picture resolution */ |
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|
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WARP3D *cwarp; /* our warp map */ |
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int iclip = CGAMUT_UPPER; /* input value gamut clipping */ |
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int oclip = CGAMUT_LOWER; /* output value gamut clipping */ |
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|
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static void syserror(char *s); |
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static void picwarp(void); |
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|
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|
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int |
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main( |
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int argc, |
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char *argv[] |
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) |
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{ |
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static char picfmt[MAXFMTLEN] = PICFMT; |
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int cwflags = 0; |
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int rval; |
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int i; |
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|
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progname = argv[0]; |
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infp = stdin; |
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/* get options */ |
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for (i = 1; i < argc && argv[i][0] == '-'; i++) |
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switch (argv[i][1]) { |
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case 'e': |
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cwflags = W3EXACT; |
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break; |
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case 'f': |
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cwflags = W3FAST; |
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break; |
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case 'i': |
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iclip = 0; |
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break; |
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case 'o': |
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oclip = CGAMUT; |
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break; |
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default: |
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goto userr; |
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} |
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/* load warp map */ |
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if (i >= argc) |
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goto userr; |
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if ((cwarp = load3dw(argv[i++], NULL)) == NULL) |
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syserror("load3dw"); |
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set3dwfl(cwarp, cwflags); |
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/* open input and output pictures */ |
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if (i < argc && (infp = fopen(argv[i], "r")) == NULL) |
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syserror(argv[i]); |
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if (i < argc-1 && freopen(argv[i+1], "w", stdout) == NULL) |
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syserror(argv[i+1]); |
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/* transfer header */ |
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if ((rval = checkheader(infp, picfmt, stdout)) < 0) { |
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fprintf(stderr, "%s: input not a Radiance picture\n", |
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progname); |
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exit(1); |
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} |
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if (rval) |
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fputformat(picfmt, stdout); |
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/* add new header info. */ |
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printargs(i, argv, stdout); |
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putchar('\n'); |
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/* get picture size */ |
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if ((rval = fgetresolu(&xres, &yres, infp)) < 0) { |
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fprintf(stderr, "%s: bad picture size\n", progname); |
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exit(1); |
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} |
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/* new picture size the same */ |
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fputresolu(rval, xres, yres, stdout); |
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/* warp those colors! */ |
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picwarp(); |
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exit(0); |
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userr: |
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fprintf(stderr, |
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"Usage: %s [-i][-o][-e|-f] map.cwp [input.hdr [output.hdr]]\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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static void |
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syserror( /* print system error and exit */ |
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char *s |
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) |
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{ |
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fprintf(stderr, "%s: ", progname); |
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perror(s); |
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exit(2); |
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} |
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|
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|
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static void |
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picwarp(void) /* warp our picture scanlines */ |
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{ |
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register COLOR *scan; |
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long ngamut = 0; |
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int rval; |
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int y; |
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register int x; |
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|
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scan = (COLOR *)malloc(xres*sizeof(COLOR)); |
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if (scan == NULL) |
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syserror("picwarp"); |
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for (y = 0; y < yres; y++) { |
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if (freadscan(scan, xres, infp) < 0) { |
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fprintf(stderr, "%s: error reading input picture\n", |
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progname); |
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exit(1); |
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} |
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for (x = 0; x < xres; x++) { |
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if (iclip) |
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clipgamut(scan[x], bright(scan[x]), iclip, |
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cblack, cwhite); |
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rval = warp3d(scan[x], scan[x], cwarp); |
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if (rval & W3ERROR) |
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syserror("warp3d"); |
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if (rval & W3BADMAP) { |
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fprintf(stderr, "%s: singular color mapping\n", |
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progname); |
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exit(1); |
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} |
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if (rval & W3GAMUT) |
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ngamut++; |
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if (oclip) |
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clipgamut(scan[x], bright(scan[x]), oclip, |
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cblack, cwhite); |
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} |
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if (fwritescan(scan, xres, stdout) < 0) { |
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fprintf(stderr, "%s: error writing output picture\n", |
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progname); |
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exit(1); |
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} |
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} |
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if (ngamut >= (long)xres*yres/100) |
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fprintf(stderr, "%s: warning - %ld%% of pixels out of gamut\n", |
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progname, 100*ngamut/((long)xres*yres)); |
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free((void *)scan); |
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} |
