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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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*/ |
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#include <stdio.h> |
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#include <math.h> |
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#include <time.h> |
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#include "rtmisc.h" |
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#include "rasterfile.h" |
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#include "color.h" |
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#include "resolu.h" |
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#include "pic.h" |
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/* descriptor for a picture file or frame buffer */ |
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} pos; /* position(s) */ |
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} pic; |
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extern pic *openinput(), *openoutput(); |
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extern char *ecalloc(), *emalloc(); |
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extern long ftell(); |
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extern double atof(), pow(); |
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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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pic *inpic, *outpic; |
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char *progname; |
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char errmsg[128]; |
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COLR *inl; |
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int xmax, ymax; |
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static void quiterr(char *err); |
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static pic * openinput(char *fname, struct rasterfile *h); |
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static pic * openoutput(char *fname, struct rasterfile *h); |
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static void pr2ra(struct rasterfile *h); |
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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int |
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main(int argc, char *argv[]) |
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{ |
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colormap rasmap; |
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struct rasterfile head; |
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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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quiterr(err) /* print message and exit */ |
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char *err; |
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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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} |
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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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} |
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pic * |
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openinput(fname, h) /* open RADIANCE input file */ |
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char *fname; |
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register struct rasterfile *h; |
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static pic * |
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openinput( /* open RADIANCE input file */ |
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char *fname, |
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register struct rasterfile *h |
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) |
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{ |
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register pic *p; |
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} |
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pic * |
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openoutput(fname, h) /* open output rasterfile */ |
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char *fname; |
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register struct rasterfile *h; |
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static pic * |
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openoutput( /* open output rasterfile */ |
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char *fname, |
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register struct rasterfile *h |
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) |
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{ |
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register pic *p; |
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} |
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pr2ra(h) /* pixrect file to RADIANCE file */ |
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struct rasterfile *h; |
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static void |
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pr2ra( /* pixrect file to RADIANCE file */ |
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struct rasterfile *h |
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) |
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{ |
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BYTE cmap[3][256]; |
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COLR ctab[256]; |
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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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picreadline3(y, l3) /* read in 3-byte scanline */ |
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int y; |
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register rgbpixel *l3; |
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extern void |
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picreadline3( /* read in 3-byte scanline */ |
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int y, |
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register rgbpixel *l3 |
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) |
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{ |
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register int i; |
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} |
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picwriteline(y, l) /* write out scanline */ |
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int y; |
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register pixel *l; |
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extern void |
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picwriteline( /* write out scanline */ |
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int y, |
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register pixel *l |
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) |
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{ |
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if (outpic->nexty != y) { /* seek to scanline */ |
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if (outpic->bytes_line == 0) { |
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} |
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picwritecm(cm) /* write out color map */ |
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colormap cm; |
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extern void |
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picwritecm( /* write out color map */ |
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colormap cm |
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) |
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{ |
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register int i, j; |
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} |
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picreadcm(map) /* do gamma correction if requested */ |
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colormap map; |
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extern void |
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picreadcm( /* do gamma correction if requested */ |
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colormap map |
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) |
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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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} |