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; These routines manage gradual fading
; (e.g., entering a doorway)
LoadGBPal::
ld a, [wMapPalOffset] ; tells if wCurMap is dark (requires HM5_FLASH?)
ld b, a
ld hl, FadePal4
ld a, l
sub b
ld l, a
jr nc, .ok
dec h
.ok
ld a, [hli]
ldh [rBGP], a
ld a, [hli]
ldh [rOBP0], a
ld a, [hli]
ldh [rOBP1], a
call UpdateCGBPal_BGP
call UpdateCGBPal_OBP0
call UpdateCGBPal_OBP1
ret
GBFadeInFromBlack::
ld hl, FadePal1
ld b, 4
jr GBFadeIncCommon
GBFadeOutToWhite::
ld hl, FadePal6
ld b, 3
GBFadeIncCommon:
ld a, [hli]
ldh [rBGP], a
ld a, [hli]
ldh [rOBP0], a
ld a, [hli]
ldh [rOBP1], a
call UpdateCGBPal_BGP
call UpdateCGBPal_OBP0
call UpdateCGBPal_OBP1
ld c, 8
call DelayFrames
dec b
jr nz, GBFadeIncCommon
ret
GBFadeOutToBlack::
ld hl, FadePal4 + 2
ld b, 4
jr GBFadeDecCommon
GBFadeInFromWhite::
ld hl, FadePal7 + 2
ld b, 3
GBFadeDecCommon:
ld a, [hld]
ldh [rOBP1], a
ld a, [hld]
ldh [rOBP0], a
ld a, [hld]
ldh [rBGP], a
call UpdateCGBPal_BGP
call UpdateCGBPal_OBP0
call UpdateCGBPal_OBP1
ld c, 8
call DelayFrames
dec b
jr nz, GBFadeDecCommon
ret
FadePal1:: dc 3,3,3,3, 3,3,3,3, 3,3,3,3
FadePal2:: dc 3,3,3,2, 3,3,3,2, 3,3,2,0
FadePal3:: dc 3,3,2,1, 3,2,1,0, 3,2,1,0
FadePal4:: dc 3,2,1,0, 3,1,0,0, 3,2,0,0
; rBGP rOBP0 rOBP1
FadePal5:: dc 3,2,1,0, 3,1,0,0, 3,2,0,0
FadePal6:: dc 2,1,0,0, 2,0,0,0, 2,1,0,0
FadePal7:: dc 1,0,0,0, 1,0,0,0, 1,0,0,0
FadePal8:: dc 0,0,0,0, 0,0,0,0, 0,0,0,0
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