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/* Copyright (c) 1986 Regents of the University of California */ |
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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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double gamma = 2.0; /* 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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case 'b': |
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greyscale = !greyscale; |
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break; |
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case 'e': |
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if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
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goto userr; |
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bradj = atoi(argv[++i]); |
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break; |
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case 'r': |
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reverse = !reverse; |
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break; |
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/* convert file */ |
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pr2ra(&head); |
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} else { |
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if (i > argc-1 || i < argc-2) |
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if (i < argc-2 || (!greyscale && i > argc-1)) |
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goto userr; |
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if ((inpic = openinput(argv[i], &head)) == NULL) { |
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sprintf(errmsg, "can't open input \"%s\"", argv[i]); |
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quiterr(NULL); |
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userr: |
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fprintf(stderr, |
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"Usage: %s [-d][-c ncolors][-b][-g gamma] input [output]\n", |
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"Usage: %s [-d][-c ncolors][-b][-g gamma][-e +/-stops] input [output]\n", |
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progname); |
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fprintf(stderr, " Or: %s -r [-g gamma] [input [output]]\n", |
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fprintf(stderr, " Or: %s -r [-g gamma][-e +/-stops] [input [output]]\n", |
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progname); |
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exit(1); |
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} |
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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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if (bradj) |
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shiftcolrs(ctab, 256, bradj); |
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/* convert file */ |
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for (i = 0; i < ymax; i++) { |
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for (j = 0; j < xmax; j++) { |
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quiterr("read error in picreadline3"); |
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inpic->nexty = y+1; |
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/* convert scanline */ |
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normcolrs(inl, xmax, 0); |
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normcolrs(inl, xmax, bradj); |
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for (i = 0; i < xmax; i++) { |
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l3[i].r = inl[i][RED]; |
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l3[i].g = inl[i][GRN]; |