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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* ra_pr.c - program to convert between RADIANCE and pixrect picture format. |
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* |
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#include <math.h> |
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#include <time.h> |
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#include "rasterfile.h" |
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#include "color.h" |
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extern long ftell(); |
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double gamma = 2.2; /* gamma correction */ |
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double gamcor = 2.2; /* gamma correction */ |
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int bradj = 0; /* brightness adjustment */ |
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dither = !dither; |
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break; |
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case 'g': |
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gamma = atof(argv[++i]); |
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gamcor = atof(argv[++i]); |
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break; |
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case 'b': |
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greyscale = !greyscale; |
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head.ras_depth != 8) |
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quiterr("incompatible format"); |
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/* put header */ |
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newheader("RADIANCE", stdout); |
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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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} |
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void |
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eputs(s) |
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char *s; |
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{ |
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} |
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void |
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quit(code) |
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int code; |
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{ |
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/* convert table */ |
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for (i = 0; i < h->ras_maplength/3; i++) |
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setcolr(ctab[i], |
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pow((cmap[0][i]+.5)/256.,gamma), |
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pow((cmap[1][i]+.5)/256.,gamma), |
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pow((cmap[2][i]+.5)/256.,gamma)); |
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pow((cmap[0][i]+.5)/256.,gamcor), |
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pow((cmap[1][i]+.5)/256.,gamcor), |
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pow((cmap[2][i]+.5)/256.,gamcor)); |
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if (bradj) |
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shiftcolrs(ctab, 256, bradj); |
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/* convert file */ |
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if (fwritecolrs(scanline, xmax, stdout) < 0) |
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quiterr("error writing RADIANCE file"); |
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} |
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free((char *)scanline); |
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free((void *)scanline); |
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} |
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register int i, val; |
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for (i = 0; i < 256; i++) { |
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val = pow((i+0.5)/256.0, 1.0/gamma) * 256.0; |
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val = pow((i+0.5)/256.0, 1.0/gamcor) * 256.0; |
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map[0][i] = map[1][i] = map[2][i] = val; |
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} |
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} |