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/* Copyright (c) 1995 Regents of the University of California */ |
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/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static char SCCSid[] = "$SunId$ SGI"; |
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#endif |
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/* |
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#endif |
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#include "color.h" |
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#define GAMVAL 1.47 /* gamma value for pixels */ |
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#define CODE6GAM 1.47 /* gamma for 6-bit codes */ |
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#define DEFDGAM 1.0 /* default device gamma */ |
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#define GRY -1 /* artificial index for grey */ |
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int wrongformat = 0; /* input in wrong format? */ |
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double pixaspect = 1.0; /* pixel aspect ratio */ |
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double devgam = DEFDGAM; /* device gamma response */ |
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int docolor = 0; /* produce color image? */ |
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int bradj = 0; /* brightness adjustment */ |
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int ncopies = 1; /* number of copies */ |
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case 'C': /* compressed ASCII encoding */ |
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putprim = Cputprim; |
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break; |
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case 'g': |
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devgam = atof(argv[++i]); |
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break; |
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case 'e': /* exposure adjustment */ |
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if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
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goto userr; |
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quiterr("bad picture format"); |
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/* gamma compression */ |
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if (putprim == Cputprim) |
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setcolrgam(GAMVAL); |
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setcolrgam(CODE6GAM/devgam); |
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else if (devgam != 1.) |
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setcolrgam(1./devgam); |
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/* write header */ |
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PSheader(i <= argc-1 ? argv[i] : "<stdin>"); |
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/* convert file */ |
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PStrailer(); |
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exit(0); |
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userr: |
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fprintf(stderr, "Usage: %s [-b|c][-A|B|C][-e +/-stops] [input [output]]\n", |
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fprintf(stderr, "Usage: %s [-b|c][-A|B|C][-e +/-stops][-g gamma] [input [output]]\n", |
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progname); |
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exit(1); |
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} |
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for (i = 0; i < 128; i++) /* clear */ |
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itab[i] = -1; |
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for (i = 1; i < 63; i++) /* assign greys */ |
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itab[code[i]] = 256.0*pow((i+.5)/64.0, GAMVAL); |
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itab[code[i]] = 256.0*pow((i+.5)/64.0, CODE6GAM); |
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itab[code[0]] = 0; /* black is black */ |
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itab[code[63]] = 255; /* and white is white */ |
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printf("/codetab ["); |
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for (y = ymax-1; y >= 0; y--) { |
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if (freadcolrs(scanin, xmax, stdin) < 0) |
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quiterr("error reading Radiance picture"); |
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if (putprim == Cputprim) { |
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if (putprim == Cputprim || devgam != 1.) { |
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if (bradj) /* adjust exposure */ |
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shiftcolrs(scanin, xmax, bradj); |
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colrs_gambs(scanin, xmax); /* gamma compression */ |
