/
map_palettes.asm
89 lines (83 loc) · 1.21 KB
/
map_palettes.asm
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_LoadOverworldAttrmapPals::
; Load wAttrmap palette numbers based on the tileset palettes of current map.
; This function is only used for the initial loading of the map; incremental
; loads while moving happen through ScrollBGMapPalettes.
hlcoord 0, 0
decoord 0, 0, wAttrmap
ld b, SCREEN_HEIGHT
.loop
push bc
ld c, SCREEN_WIDTH
.innerloop
ld a, [hl]
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
jr .next
.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
.next
pop hl
ld [de], a
res 7, [hl]
inc hl
inc de
dec c
jr nz, .innerloop
pop bc
dec b
jr nz, .loop
ret
_ScrollBGMapPalettes::
ld hl, wBGMapBuffer
ld de, wBGMapPalBuffer
.loop
ld a, [hl]
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
jr .next
.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
.next
pop hl
ld [de], a
res 7, [hl]
inc hl
inc de
dec c
jr nz, .loop
ret