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73 lines
1.3 KiB
NASM
73 lines
1.3 KiB
NASM
; These routines manage gradual fading
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; (e.g., entering a doorway)
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LoadGBPal::
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ld a, [wMapPalOffset] ;tells if cur.map is dark (requires HM5_FLASH?)
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ld b, a
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ld hl, FadePal4
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ld a, l
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sub b
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ld l, a
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jr nc, .ok
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dec h
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.ok
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ld a, [hli]
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ld [rBGP], a
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ld a, [hli]
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ld [rOBP0], a
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ld a, [hli]
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ld [rOBP1], a
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ret
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GBFadeInFromBlack::
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ld hl, FadePal1
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ld b, 4
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jr GBFadeIncCommon
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GBFadeOutToWhite::
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ld hl, FadePal6
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ld b, 3
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GBFadeIncCommon:
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ld a, [hli]
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ld [rBGP], a
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ld a, [hli]
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ld [rOBP0], a
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ld a, [hli]
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ld [rOBP1], a
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ld c, 8
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call DelayFrames
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dec b
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jr nz, GBFadeIncCommon
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ret
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GBFadeOutToBlack::
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ld hl, FadePal4 + 2
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ld b, 4
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jr GBFadeDecCommon
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GBFadeInFromWhite::
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ld hl, FadePal7 + 2
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ld b, 3
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GBFadeDecCommon:
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ld a, [hld]
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ld [rOBP1], a
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ld a, [hld]
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ld [rOBP0], a
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ld a, [hld]
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ld [rBGP], a
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ld c, 8
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call DelayFrames
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dec b
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jr nz, GBFadeDecCommon
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ret
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FadePal1:: db %11111111, %11111111, %11111111
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FadePal2:: db %11111110, %11111110, %11111000
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FadePal3:: db %11111001, %11100100, %11100100
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FadePal4:: db %11100100, %11010000, %11100000
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; rBGP rOBP0 rOBP1
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FadePal5:: db %11100100, %11010000, %11100000
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FadePal6:: db %10010000, %10000000, %10010000
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FadePal7:: db %01000000, %01000000, %01000000
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FadePal8:: db %00000000, %00000000, %00000000
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