| 1 |
/* Copyright (c) 1986 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* oki20c.c - program to dump pixel file to OkiMate 20 color printer. |
| 9 |
* |
| 10 |
* 6/10/87 |
| 11 |
*/ |
| 12 |
|
| 13 |
#include <stdio.h> |
| 14 |
|
| 15 |
#include "color.h" |
| 16 |
|
| 17 |
|
| 18 |
#define NROWS 1440 /* 10" at 144 dpi */ |
| 19 |
#define NCOLS 960 /* 8" at 120 dpi */ |
| 20 |
|
| 21 |
/* |
| 22 |
* Subtractive primaries are ordered: Yellow, Magenta, Cyan. |
| 23 |
*/ |
| 24 |
|
| 25 |
#define sub_add(sub) (2-(sub)) /* map subtractive to additive pri. */ |
| 26 |
|
| 27 |
|
| 28 |
main(argc, argv) |
| 29 |
int argc; |
| 30 |
char *argv[]; |
| 31 |
{ |
| 32 |
int i, status = 0; |
| 33 |
|
| 34 |
if (argc < 2) |
| 35 |
status = printp(NULL) == -1; |
| 36 |
else |
| 37 |
for (i = 1; i < argc; i++) |
| 38 |
status += printp(argv[i]) == -1; |
| 39 |
exit(status); |
| 40 |
} |
| 41 |
|
| 42 |
|
| 43 |
printp(fname) /* print a picture */ |
| 44 |
char *fname; |
| 45 |
{ |
| 46 |
FILE *input; |
| 47 |
int xres, yres; |
| 48 |
COLOR scanline[NCOLS]; |
| 49 |
int i; |
| 50 |
|
| 51 |
if (fname == NULL) { |
| 52 |
input = stdin; |
| 53 |
fname = "<stdin>"; |
| 54 |
} else if ((input = fopen(fname, "r")) == NULL) { |
| 55 |
fprintf(stderr, "%s: cannot open\n", fname); |
| 56 |
return(-1); |
| 57 |
} |
| 58 |
/* discard header */ |
| 59 |
getheader(input, NULL); |
| 60 |
/* get picture dimensions */ |
| 61 |
if (fgetresolu(&xres, &yres, input) != (YMAJOR|YDECR)) { |
| 62 |
fprintf(stderr, "%s: bad picture size\n", fname); |
| 63 |
return(-1); |
| 64 |
} |
| 65 |
if (xres > NCOLS || yres > NROWS) { |
| 66 |
fprintf(stderr, "%s: resolution mismatch\n", fname); |
| 67 |
return(-1); |
| 68 |
} |
| 69 |
/* set line spacing (overlap for knitting) */ |
| 70 |
fputs("\0333\042", stdout); |
| 71 |
/* put out scanlines */ |
| 72 |
for (i = yres-1; i >= 0; i--) { |
| 73 |
if (freadscan(scanline, xres, input) < 0) { |
| 74 |
fprintf(stderr, "%s: read error (y=%d)\n", fname, i); |
| 75 |
return(-1); |
| 76 |
} |
| 77 |
plotscan(scanline, xres, i); |
| 78 |
} |
| 79 |
/* advance page */ |
| 80 |
putchar('\f'); |
| 81 |
|
| 82 |
fclose(input); |
| 83 |
|
| 84 |
return(0); |
| 85 |
} |
| 86 |
|
| 87 |
|
| 88 |
plotscan(scan, len, y) /* plot a scanline */ |
| 89 |
COLOR scan[]; |
| 90 |
int len; |
| 91 |
int y; |
| 92 |
{ |
| 93 |
static long pat[NCOLS][3]; |
| 94 |
int bpos; |
| 95 |
register long c; |
| 96 |
register int i, j; |
| 97 |
|
| 98 |
if (bpos = y % 23) { |
| 99 |
|
| 100 |
for (j = 0; j < 3; j++) |
| 101 |
for (i = 0; i < len; i++) |
| 102 |
pat[i][j] |= (long)colbit(scan[i],i,j) << bpos; |
| 103 |
|
| 104 |
} else { |
| 105 |
|
| 106 |
fputs("\033\031", stdout); |
| 107 |
|
| 108 |
for (j = 0; j < 3; j++) { |
| 109 |
fputs("\033%O", stdout); |
| 110 |
putchar(len & 255); |
| 111 |
putchar(len >> 8); |
| 112 |
for (i = 0; i < len; i++) { |
| 113 |
if (y!=0 & i+j) { /* knit bit */ |
| 114 |
c = pat[i][j]; |
| 115 |
pat[i][j] = colbit(scan[i],i,j) << 23; |
| 116 |
} else { |
| 117 |
c = pat[i][j] | colbit(scan[i],i,j); |
| 118 |
pat[i][j] = 0; |
| 119 |
} |
| 120 |
putchar(c>>16); |
| 121 |
putchar(c>>8 & 255); |
| 122 |
putchar(c & 255); |
| 123 |
} |
| 124 |
putchar('\r'); |
| 125 |
} |
| 126 |
putchar('\n'); |
| 127 |
} |
| 128 |
} |
| 129 |
|
| 130 |
|
| 131 |
colbit(col, x, s) /* determine bit value for primary at x */ |
| 132 |
COLOR col; |
| 133 |
register int x; |
| 134 |
int s; |
| 135 |
{ |
| 136 |
static float cerr[NCOLS][3]; |
| 137 |
static double err[3]; |
| 138 |
double b; |
| 139 |
register int a, ison; |
| 140 |
|
| 141 |
a = sub_add(s); /* use additive primary */ |
| 142 |
b = colval(col,a); |
| 143 |
if (b > 1.0) b = 1.0; |
| 144 |
err[a] += b + cerr[x][a]; |
| 145 |
ison = err[a] < 0.5; |
| 146 |
if (!ison) err[a] -= 1.0; |
| 147 |
cerr[x][a] = err[a] *= 0.5; |
| 148 |
return(ison); |
| 149 |
} |
