| # | Line 548 | Line 548 | getmono() /* get monochrome data */ | |
|---|---|---|
| 548 | { | |
| 549 | register unsigned short *dp; | |
| 550 | register int x, err; | |
| 551 | < | int y; |
| 551 | > | int y, errp; |
| 552 | rgbpixel *inl; | |
| 553 | short *cerr; | |
| 554 | ||
| # | Line 562 | Line 562 | getmono() /* get monochrome data */ | |
| 562 | for (x = 0; x < xmax; x++) { | |
| 563 | if (!(x&0xf)) | |
| 564 | *++dp = 0; | |
| 565 | + | errp = err; |
| 566 | err += rgb_bright(&inl[x]) + cerr[x]; | |
| 567 | if (err > 127) | |
| 568 | err -= 255; | |
| 569 | else | |
| 570 | *dp |= 1<<(x&0xf); | |
| 571 | < | cerr[x] = err >>= 1; |
| 571 | > | err /= 3; |
| 572 | > | cerr[x] = err + errp; |
| 573 | } | |
| 574 | } | |
| 575 | free((char *)inl); | |
| – | Removed lines |
| + | Added lines |
| < | Changed lines |
| > | Changed lines |