| 653 |
|
int y; |
| 654 |
|
COLR *scan; |
| 655 |
|
{ |
| 656 |
– |
static char *dp = NULL; |
| 656 |
|
static short cerr[ICONSIZ]; |
| 657 |
+ |
static int ynext; |
| 658 |
+ |
static char *dp; |
| 659 |
|
register int err; |
| 660 |
< |
register int x, xi; |
| 660 |
> |
register int x, ti; |
| 661 |
|
|
| 662 |
|
if (iconheight == 0) { /* initialize */ |
| 663 |
|
if (xmax <= ICONSIZ && ymax <= ICONSIZ) { |
| 670 |
|
iconwidth = ICONSIZ*xmax/ymax; |
| 671 |
|
iconheight = ICONSIZ; |
| 672 |
|
} |
| 673 |
+ |
ynext = 0; |
| 674 |
|
dp = icondata - 1; |
| 675 |
|
} |
| 676 |
< |
if (dp == NULL) /* done already */ |
| 676 |
> |
if (y < ynext*ymax/iconheight) /* skip this one */ |
| 677 |
|
return; |
| 676 |
– |
if (y % (ymax/iconheight)) /* skip this one */ |
| 677 |
– |
return; |
| 678 |
|
err = 0; |
| 679 |
|
for (x = 0; x < iconwidth; x++) { |
| 680 |
|
if (!(x&7)) |
| 681 |
|
*++dp = 0; |
| 682 |
< |
xi = x*xmax/iconwidth; |
| 683 |
< |
err += normbright(scan[xi]) + cerr[x]; |
| 682 |
> |
ti = x*xmax/iconwidth; |
| 683 |
> |
err += normbright(scan[ti]) + cerr[x]; |
| 684 |
|
if (err > 127) |
| 685 |
|
err -= 255; |
| 686 |
|
else |
| 687 |
|
*dp |= 1<<(x&07); |
| 688 |
|
cerr[x] = err >>= 1; |
| 689 |
|
} |
| 690 |
< |
if (y >= ymax - ymax/iconheight) /* all done */ |
| 691 |
< |
dp = NULL; |
| 690 |
> |
ynext++; |
| 691 |
|
} |
| 692 |
|
|
| 693 |
|
|
