| 367 |
|
} |
| 368 |
|
|
| 369 |
|
|
| 370 |
< |
normcolrs(scan, len) /* normalize a scanline of colrs */ |
| 370 |
> |
normcolrs(scan, len, adjust) /* normalize a scanline of colrs */ |
| 371 |
|
register COLR *scan; |
| 372 |
|
int len; |
| 373 |
+ |
int adjust; |
| 374 |
|
{ |
| 375 |
|
register int c; |
| 376 |
|
register int shift; |
| 377 |
|
|
| 378 |
|
while (len-- > 0) { |
| 379 |
< |
shift = scan[0][EXP] - COLXS; |
| 379 |
> |
shift = scan[0][EXP] + adjust - COLXS; |
| 380 |
|
if (shift > 0) { |
| 381 |
< |
if (shift >= 8) { |
| 381 |
> |
if (shift > 8) { |
| 382 |
|
scan[0][RED] = |
| 383 |
|
scan[0][GRN] = |
| 384 |
|
scan[0][BLU] = 255; |
| 385 |
|
} else { |
| 386 |
< |
c = scan[0][RED] << shift; |
| 386 |
> |
shift--; |
| 387 |
> |
c = (scan[0][RED]<<1 | 1) << shift; |
| 388 |
|
scan[0][RED] = c > 255 ? 255 : c; |
| 389 |
< |
c = scan[0][GRN] << shift; |
| 389 |
> |
c = (scan[0][GRN]<<1 | 1) << shift; |
| 390 |
|
scan[0][GRN] = c > 255 ? 255 : c; |
| 391 |
< |
c = scan[0][BLU] << shift; |
| 391 |
> |
c = (scan[0][BLU]<<1 | 1) << shift; |
| 392 |
|
scan[0][BLU] = c > 255 ? 255 : c; |
| 393 |
|
} |
| 394 |
|
} else if (shift < 0) { |
| 395 |
< |
if (shift <= -8) { |
| 395 |
> |
if (shift < -8) { |
| 396 |
|
scan[0][RED] = |
| 397 |
|
scan[0][GRN] = |
| 398 |
|
scan[0][BLU] = 0; |
| 399 |
|
} else { |
| 400 |
< |
scan[0][RED] = scan[0][RED] >> -shift; |
| 401 |
< |
scan[0][GRN] = scan[0][GRN] >> -shift; |
| 402 |
< |
scan[0][BLU] = scan[0][BLU] >> -shift; |
| 400 |
> |
shift = -1-shift; |
| 401 |
> |
scan[0][RED] = ((scan[0][RED]>>shift)+1)>>1; |
| 402 |
> |
scan[0][GRN] = ((scan[0][GRN]>>shift)+1)>>1; |
| 403 |
> |
scan[0][BLU] = ((scan[0][BLU]>>shift)+1)>>1; |
| 404 |
|
} |
| 405 |
|
} |
| 406 |
< |
scan[0][EXP] = COLXS; |
| 406 |
> |
scan[0][EXP] = COLXS - adjust; |
| 407 |
|
scan++; |
| 408 |
|
} |
| 409 |
|
} |
