| 18 |
|
#define NROWS 1440 /* 10" at 144 dpi */ |
| 19 |
|
#define NCOLS 960 /* 8" at 120 dpi */ |
| 20 |
|
|
| 21 |
+ |
#define ASPECT (120./144.) /* pixel aspect ratio */ |
| 22 |
+ |
|
| 23 |
+ |
#define FILTER "pfilt -1 -x %d -y %d -p %f %s",NCOLS,NROWS,ASPECT |
| 24 |
+ |
|
| 25 |
|
/* |
| 26 |
|
* Subtractive primaries are ordered: Yellow, Magenta, Cyan. |
| 27 |
|
*/ |
| 36 |
|
|
| 37 |
|
long lpat[NCOLS][3]; |
| 38 |
|
|
| 39 |
+ |
int dofilter = 0; /* filter through pfilt first? */ |
| 40 |
|
|
| 41 |
+ |
|
| 42 |
|
main(argc, argv) |
| 43 |
|
int argc; |
| 44 |
|
char *argv[]; |
| 45 |
|
{ |
| 46 |
|
int i, status = 0; |
| 47 |
|
|
| 48 |
+ |
if (argc > 1 && !strcmp(argv[1], "-p")) { |
| 49 |
+ |
dofilter++; |
| 50 |
+ |
argv++; argc--; |
| 51 |
+ |
} |
| 52 |
+ |
#ifdef _IOLBF |
| 53 |
+ |
stdout->_flag &= ~_IOLBF; |
| 54 |
+ |
#endif |
| 55 |
|
if (argc < 2) |
| 56 |
|
status = printp(NULL) == -1; |
| 57 |
|
else |
| 64 |
|
printp(fname) /* print a picture */ |
| 65 |
|
char *fname; |
| 66 |
|
{ |
| 67 |
+ |
char buf[64]; |
| 68 |
|
FILE *input; |
| 69 |
|
int xres, yres; |
| 70 |
|
COLR scanline[NCOLS]; |
| 71 |
|
int i; |
| 72 |
|
|
| 73 |
< |
if (fname == NULL) { |
| 73 |
> |
if (dofilter) { |
| 74 |
> |
if (fname == NULL) |
| 75 |
> |
fname = ""; |
| 76 |
> |
sprintf(buf, FILTER, fname); |
| 77 |
> |
if ((input = popen(buf, "r")) == NULL) { |
| 78 |
> |
fprintf(stderr, "Cannot execute: %s\n", buf); |
| 79 |
> |
return(-1); |
| 80 |
> |
} |
| 81 |
> |
fname = buf; |
| 82 |
> |
} else if (fname == NULL) { |
| 83 |
|
input = stdin; |
| 84 |
|
fname = "<stdin>"; |
| 85 |
|
} else if ((input = fopen(fname, "r")) == NULL) { |
| 116 |
|
/* advance page */ |
| 117 |
|
putchar('\f'); |
| 118 |
|
|
| 119 |
< |
fclose(input); |
| 119 |
> |
if (dofilter) |
| 120 |
> |
pclose(input); |
| 121 |
> |
else |
| 122 |
> |
fclose(input); |
| 123 |
|
|
| 124 |
|
return(0); |
| 125 |
|
} |
| 145 |
|
fputs("\033\031", stdout); |
| 146 |
|
|
| 147 |
|
for (j = 0; j < 3; j++) { |
| 148 |
+ |
i = (NCOLS + len)/2; /* center image */ |
| 149 |
|
fputs("\033%O", stdout); |
| 150 |
< |
putchar(len & 255); |
| 151 |
< |
putchar(len >> 8); |
| 150 |
> |
putchar(i & 255); |
| 151 |
> |
putchar(i >> 8); |
| 152 |
> |
while (i-- > len) { |
| 153 |
> |
putchar(0); |
| 154 |
> |
putchar(0); |
| 155 |
> |
putchar(0); |
| 156 |
> |
} |
| 157 |
|
for (i = 0; i < len; i++) { |
| 158 |
|
c = lpat[i][j] | colbit(scan[i],i,j); |
| 159 |
|
/* repeat this row */ |
| 165 |
|
putchar('\r'); |
| 166 |
|
} |
| 167 |
|
putchar('\n'); |
| 168 |
+ |
fflush(stdout); |
| 169 |
|
} |
| 170 |
|
} |
| 171 |
|
|
| 176 |
|
int s; |
| 177 |
|
{ |
| 178 |
|
static int cerr[NCOLS][3]; |
| 179 |
< |
static int err[3], errp[3]; |
| 180 |
< |
int b; |
| 179 |
> |
static int err[3]; |
| 180 |
> |
int b, errp; |
| 181 |
|
register int a, ison; |
| 182 |
|
|
| 183 |
|
a = sub_add(s); /* use additive primary */ |
| 184 |
|
b = col[a]; |
| 185 |
< |
errp[a] = err[a]; |
| 185 |
> |
errp = err[a]; |
| 186 |
|
err[a] += b + cerr[x][a]; |
| 187 |
|
ison = err[a] < 128; |
| 188 |
|
if (!ison) err[a] -= 256; |
| 189 |
|
err[a] /= 3; |
| 190 |
< |
cerr[x][a] = err[a] + errp[a]; |
| 190 |
> |
cerr[x][a] = err[a] + errp; |
| 191 |
|
return(ison); |
| 192 |
|
} |
