| 17 |
|
|
| 18 |
|
#define NCOLS 133 |
| 19 |
|
|
| 20 |
– |
char shadech[] = " .,:;+?%&*$@#"; |
| 20 |
|
|
| 22 |
– |
#define NSHADES (sizeof(shadech)-1) |
| 23 |
– |
|
| 24 |
– |
#define shade(col) ( bright(col)>=1.0 ? NSHADES-1 : \ |
| 25 |
– |
(int)(bright(col)*NSHADES) ) |
| 26 |
– |
|
| 27 |
– |
char *progname; |
| 28 |
– |
|
| 29 |
– |
|
| 21 |
|
main(argc, argv) |
| 22 |
|
int argc; |
| 23 |
|
char **argv; |
| 24 |
|
{ |
| 25 |
|
FILE *input; |
| 26 |
|
int xres, yres; |
| 27 |
< |
COLOR scanline[NCOLS]; |
| 37 |
< |
char sbuf[256]; |
| 27 |
> |
COLR scanline[NCOLS]; |
| 28 |
|
register int i, j; |
| 29 |
|
|
| 40 |
– |
progname = argv[0]; |
| 41 |
– |
|
| 30 |
|
if (argc < 2) |
| 31 |
|
input = stdin; |
| 32 |
|
else if ((input = fopen(argv[1], "r")) == NULL) { |
| 33 |
< |
fprintf(stderr, "%s: can't open file \"%s\"\n", progname, argv[1]); |
| 33 |
> |
fprintf(stderr, "%s: can't open file \"%s\"\n", argv[0], argv[1]); |
| 34 |
|
exit(1); |
| 35 |
|
} |
| 36 |
|
|
| 49 |
– |
/* discard header */ |
| 50 |
– |
while (fgets(sbuf, sizeof(sbuf), input) != NULL && sbuf[0] != '\n') |
| 51 |
– |
; |
| 37 |
|
/* get picture dimensions */ |
| 38 |
< |
if (fgets(sbuf, sizeof(sbuf), input) == NULL || |
| 39 |
< |
sscanf(sbuf, "-Y %d +X %d\n", &yres, &xres) != 2) { |
| 40 |
< |
fprintf(stderr, "%s: bad picture size\n", progname); |
| 38 |
> |
if (checkheader(input, COLRFMT, NULL) < 0 || |
| 39 |
> |
fgetresolu(&xres, &yres, input) != (YMAJOR|YDECR)) { |
| 40 |
> |
fprintf(stderr, "%s: bad picture format\n", argv[0]); |
| 41 |
|
exit(1); |
| 42 |
|
} |
| 43 |
|
if (xres > NCOLS) { |
| 44 |
< |
fprintf(stderr, "%s: resolution mismatch\n", progname); |
| 44 |
> |
fprintf(stderr, "%s: resolution mismatch\n", argv[0]); |
| 45 |
|
exit(1); |
| 46 |
|
} |
| 47 |
|
|
| 48 |
|
for (i = 0; i < yres; i++) { |
| 49 |
< |
if (freadscan(scanline, xres, input) < 0) { |
| 50 |
< |
fprintf(stderr, "%s: read error\n", progname); |
| 49 |
> |
if (freadcolrs(scanline, xres, input) < 0) { |
| 50 |
> |
fprintf(stderr, "%s: read error\n", argv[0]); |
| 51 |
|
exit(1); |
| 52 |
|
} |
| 53 |
+ |
normcolrs(scanline, xres, 0); |
| 54 |
|
for (j = 0; j < xres; j++) |
| 55 |
< |
putchar(shadech[shade(scanline[j])]); |
| 55 |
> |
putchar(shade(scanline[j])); |
| 56 |
|
putchar('\n'); |
| 57 |
|
} |
| 58 |
|
|
| 59 |
|
exit(0); |
| 60 |
+ |
} |
| 61 |
+ |
|
| 62 |
+ |
|
| 63 |
+ |
int |
| 64 |
+ |
shade(clr) /* return character for color */ |
| 65 |
+ |
COLR clr; |
| 66 |
+ |
{ |
| 67 |
+ |
#define NSHADES 13 |
| 68 |
+ |
|
| 69 |
+ |
static char shadech[NSHADES+1] = " .,:;+?%&*$@#"; |
| 70 |
+ |
|
| 71 |
+ |
return(shadech[normbright(clr)*NSHADES/256]); |
| 72 |
+ |
|
| 73 |
+ |
#undef NSHADES |
| 74 |
|
} |
