Fill Routine

[boriel]

Update (cleaned up):

Code:

__DECY: SPPixelDown: inc h inc h ld a, h ld a, h and 7 and 7 ret nz ret nz ld a, h sub 8 ld h, a ld a, l ld a, l add a, 32 add a, 32 ld l, a ld l, a ret c ret nc ld a, h ld a, h sub 8 add a, 8 ld h, a ld h, a ret cp $58 ccf ret

I think this one is clearer.
Both this 2 routines do the same. :?: The one on the right seems optimized (It's used in ZX Basic DRAW)