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_SwapTextboxPalettes::
hlcoord 0, 0
decoord 0, 0, wAttrmap
ld b, SCREEN_HEIGHT
.loop
ld c, SCREEN_WIDTH
.innerloop
ld a, [hli]
push hl
srl a
jr c, .UpperNybble
ld hl, wTilesetPalettes
add [hl]
ld l, a
ld a, [wTilesetPalettes + 1]
adc 0
ld h, a
ld a, [hl]
and $f
bit 3, a
jr z, .next
jr .by_map_group
.UpperNybble:
ld hl, wTilesetPalettes
add [hl]
ld l, a
ld a, [wTilesetPalettes + 1]
adc 0
ld h, a
ld a, [hl]
swap a
and $f
bit 3, a
jr z, .next
.by_map_group
ld a, [wMapGroup]
dec a
ld hl, MapGroupPalettes
add l
ld l, a
jr nc, .no_carry
inc h
.no_carry
ld a, [hl]
.next
pop hl
ld [de], a
inc de
dec c
jr nz, .innerloop
dec b
jr nz, .loop
ret
_ScrollBGMapPalettes::
ld hl, wBGMapBuffer
ld de, wBGMapPalBuffer
.loop
ld a, [hli]
push hl
srl a
jr c, .UpperNybble
; .LowerNybble
ld hl, wTilesetPalettes
add [hl]
ld l, a
ld a, [wTilesetPalettes + 1]
adc 0
ld h, a
ld a, [hl]
and $f
bit 3, a
jr z, .next
jr .by_map_group
.UpperNybble:
ld hl, wTilesetPalettes
add [hl]
ld l, a
ld a, [wTilesetPalettes + 1]
adc 0
ld h, a
ld a, [hl]
swap a
and $f
bit 3, a
jr z, .next
.by_map_group
ld a, [wMapGroup]
dec a
ld hl, MapGroupPalettes
add l
ld l, a
jr nc, .no_carry
inc h
.no_carry
ld a, [hl]
.next
pop hl
ld [de], a
inc de
dec c
jr nz, .loop
ret
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