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/* Copyright (c) 1989 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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#include <stdio.h> |
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#include "color.h" |
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#include "resolu.h" |
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#define NCOLS 1440 /* 8" at 180 dpi */ |
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return(-1); |
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} |
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/* get picture dimensions */ |
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if (fgetresolu(&xres, &yres, input) != (YMAJOR|YDECR)) { |
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if (fgetresolu(&xres, &yres, input) < 0) { |
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fprintf(stderr, "%s: bad picture size\n", fname); |
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return(-1); |
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} |
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register int a; |
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{ |
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static int cerr[NCOLS][3]; |
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static int err[3]; |
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static int err[3], errp[3]; |
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int b; |
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register int ison; |
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b = col[a]; |
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errp[a] = err[a]; |
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err[a] += b + cerr[x][a]; |
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ison = err[a] > 128; |
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if (ison) err[a] -= 256; |
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cerr[x][a] = err[a] /= 2; |
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err[a] /= 3; |
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cerr[x][a] = err[a] + errp[a]; |
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return(ison); |
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} |
