| 25 |
|
FILE *input; |
| 26 |
|
int xres, yres; |
| 27 |
|
COLR scanline[NCOLS]; |
| 28 |
– |
char sbuf[256]; |
| 28 |
|
register int i, j; |
| 29 |
|
|
| 30 |
|
if (argc < 2) |
| 34 |
|
exit(1); |
| 35 |
|
} |
| 36 |
|
|
| 38 |
– |
/* discard header */ |
| 39 |
– |
while (fgets(sbuf, sizeof(sbuf), input) != NULL && sbuf[0] != '\n') |
| 40 |
– |
; |
| 37 |
|
/* get picture dimensions */ |
| 38 |
< |
if (fgetresolu(&xres, &yres, input) != (YMAJOR|YDECR)) { |
| 39 |
< |
fprintf(stderr, "%s: bad picture size\n", argv[0]); |
| 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) { |
| 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(shade(scanline[j])); |
| 56 |
|
putchar('\n'); |
| 67 |
|
#define NSHADES 13 |
| 68 |
|
|
| 69 |
|
static char shadech[NSHADES+1] = " .,:;+?%&*$@#"; |
| 72 |
– |
COLR nclr; |
| 73 |
– |
register int b; |
| 70 |
|
|
| 71 |
< |
colr_norm(clr, nclr); |
| 76 |
< |
b = norm_bright(nclr); |
| 77 |
< |
b = b*NSHADES/256; |
| 78 |
< |
return(shadech[b]); |
| 71 |
> |
return(shadech[normbright(clr)*NSHADES/256]); |
| 72 |
|
|
| 73 |
|
#undef NSHADES |
| 74 |
|
} |
