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; Functions dealing with palettes.
UpdatePalsIfCGB:: ; c2f
; update bgp data from BGPals
; update obp data from OBPals
; return carry if successful
; check cgb
ld a, [hCGB]
and a
ret z
UpdateCGBPals:: ; c33
; return carry if successful
; any pals to update?
ld a, [hCGBPalUpdate]
and a
ret z
ForceUpdateCGBPals:: ; c37
ld a, [rSVBK]
push af
ld a, 5 ; BANK(BGPals)
ld [rSVBK], a
ld hl, BGPals ; 5:d080
; copy 8 pals to bgpd
ld a, %10000000 ; auto increment, index 0
ld [rBGPI], a
ld c, rBGPD % $100
ld b, 4 ; NUM_PALS / 2
.bgp
rept $10
ld a, [hli]
ld [$ff00+c], a
endr
dec b
jr nz, .bgp
; hl is now 5:d0c0 OBPals
; copy 8 pals to obpd
ld a, %10000000 ; auto increment, index 0
ld [rOBPI], a
ld c, rOBPD - rJOYP
ld b, 4 ; NUM_PALS / 2
.obp
rept $10
ld a, [hli]
ld [$ff00+c], a
endr
dec b
jr nz, .obp
pop af
ld [rSVBK], a
; clear pal update queue
xor a
ld [hCGBPalUpdate], a
scf
ret
; c9f
DmgToCgbBGPals:: ; c9f
; exists to forego reinserting cgb-converted image data
; input: a -> bgp
ld [rBGP], a
push af
ld a, [hCGB]
and a
jr z, .end
push hl
push de
push bc
ld a, [rSVBK]
push af
ld a, 5
ld [rSVBK], a
; copy & reorder bg pal buffer
ld hl, BGPals ; to
ld de, Unkn1Pals ; from
; order
ld a, [rBGP]
ld b, a
; all pals
ld c, 8
call CopyPals
; request pal update
ld a, 1
ld [hCGBPalUpdate], a
pop af
ld [rSVBK], a
pop bc
pop de
pop hl
.end
pop af
ret
; ccb
DmgToCgbObjPals:: ; ccb
; exists to forego reinserting cgb-converted image data
; input: d -> obp1
; e -> obp2
ld a, e
ld [rOBP0], a
ld a, d
ld [rOBP1], a
ld a, [hCGB]
and a
ret z
push hl
push de
push bc
ld a, [rSVBK]
push af
ld a, 5
ld [rSVBK], a
; copy & reorder obj pal buffer
ld hl, OBPals ; to
ld de, Unkn2Pals ; from
; order
ld a, [rOBP0]
ld b, a
; all pals
ld c, 8
call CopyPals
; request pal update
ld a, 1
ld [hCGBPalUpdate], a
pop af
ld [rSVBK], a
pop bc
pop de
pop hl
ret
; cf8
Functioncf8:: ; cf8
ld [rOBP0], a
push af
ld a, [hCGB]
and a
jr z, .asm_d22
push hl
push de
push bc
ld a, [rSVBK]
push af
ld a, $5
ld [rSVBK], a
ld hl, $d0c0
ld de, MartPointer
ld a, [rOBP0]
ld b, a
ld c, $1
call CopyPals
ld a, $1
ld [hCGBPalUpdate], a
pop af
ld [rSVBK], a
pop bc
pop de
pop hl
.asm_d22
pop af
ret
; d24
Functiond24:: ; d24
ld [rOBP1], a
push af
ld a, [hCGB]
and a
jr z, .asm_d4e
push hl
push de
push bc
ld a, [rSVBK]
push af
ld a, $5
ld [rSVBK], a
ld hl, $d0c8
ld de, $d048
ld a, [rOBP1]
ld b, a
ld c, $1
call CopyPals
ld a, $1
ld [hCGBPalUpdate], a
pop af
ld [rSVBK], a
pop bc
pop de
pop hl
.asm_d4e
pop af
ret
; d50
CopyPals:: ; d50
; copy c palettes in order b from de to hl
push bc
ld c, 4 ; NUM_PAL_COLORS
.loop
push de
push hl
; get pal color
ld a, b
and %11 ; color
; 2 bytes per color
add a
ld l, a
ld h, 0
add hl, de
ld e, [hl]
inc hl
ld d, [hl]
; dest
pop hl
; write color
ld [hl], e
inc hl
ld [hl], d
inc hl
; next pal color
srl b
srl b
; source
pop de
; done pal?
dec c
jr nz, .loop
; de += 8 (next pal)
ld a, 8 ; NUM_PAL_COLORS * 2 ; bytes per pal
add e
jr nc, .ok
inc d
.ok
ld e, a
; how many more pals?
pop bc
dec c
jr nz, CopyPals
ret
; d79
Functiond79:: ; d79
ld a, [hCGB]
and a
ret z
ld a, 1
ld [rVBK], a
ld hl, VTiles0
ld bc, $2000
xor a
call ByteFill
ld a, 0
ld [rVBK], a
ret
; d90
Functiond90:: ; d90
ret
; d91
Functiond91:: ; d91
ld a, [hCGB]
and a
ret z
ld a, [rSVBK]
push af
ld a, 5 ; BANK(BGPals)
ld [rSVBK], a
ld hl, BGPals
ld bc, $40 + $10
xor a
call ByteFill
pop af
ld [rSVBK], a
ld a, 1
ld [hCGBPalUpdate], a
call DelayFrame
ret
; db1
Functiondb1:: ; db1
ld a, [hROMBank]
push af
ld a, BANK(Function4c000)
rst Bankswitch
call Function4c000
pop af
rst Bankswitch
ret
; dbd
Functiondbd:: ; dbd
ld a, [hROMBank]
push af
ld a, BANK(Function4c03f)
rst Bankswitch
call Function4c03f
pop af
rst Bankswitch
ret
; dc9
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