1 files changed, 134 insertions, 0 deletions
diff --git a/engine/fade.asm b/engine/fade.asm
new file mode 100644
index 000000000..d67211e29
--- /dev/null
+++ b/engine/fade.asm
@@ -0,0 +1,134 @@
+; Functions to fade the screen in and out.
+
+
+Function48c: ; 48c
+	ld a, [TimeOfDayPal]
+	ld b, a
+	ld hl, IncGradGBPalTable_11
+	ld a, l
+	sub b
+	ld l, a
+	jr nc, .asm_499
+	dec h
+
+.asm_499
+	ld a, [hli]
+	ld [rBGP], a
+	ld a, [hli]
+	ld [rOBP0], a
+	ld a, [hli]
+	ld [rOBP1], a
+	ret
+; 4a3
+
+
+Function4a3: ; 4a3
+	ld a, [hCGB]
+	and a
+	jr z, .asm_4af
+	ld hl, IncGradGBPalTable_00
+	ld b, 4
+	jr FadeOut
+
+.asm_4af
+	ld hl, IncGradGBPalTable_08
+	ld b, 4
+	jr FadeOut
+; 4b6
+
+Function4b6: ; 4b6
+	ld a, [hCGB]
+	and a
+	jr z, .asm_4c2
+	ld hl, IncGradGBPalTable_05
+	ld b, 3
+	jr FadeOut
+
+.asm_4c2
+	ld hl, IncGradGBPalTable_13
+	ld b, 3
+; 4c7
+
+FadeOut: ; 4c7
+	push de
+	ld a, [hli]
+	call DmgToCgbBGPals
+	ld a, [hli]
+	ld e, a
+	ld a, [hli]
+	ld d, a
+	call DmgToCgbObjPals
+	ld c, 8
+	call DelayFrames
+	pop de
+	dec b
+	jr nz, FadeOut
+	ret
+; 4dd
+
+Function4dd: ; 4dd
+	ld a, [hCGB]
+	and a
+	jr z, .asm_4e9
+	ld hl, IncGradGBPalTable_04 - 1
+	ld b, 4
+	jr FadeIn
+
+.asm_4e9
+	ld hl, IncGradGBPalTable_12 - 1
+	ld b, 4
+	jr FadeIn
+; 4f0
+
+Function4f0: ; 4f0
+	ld a, [hCGB]
+	and a
+	jr z, .asm_4fc
+	ld hl, IncGradGBPalTable_07 - 1
+	ld b, 3
+	jr FadeIn
+
+.asm_4fc
+	ld hl, IncGradGBPalTable_15 - 1
+	ld b, 3
+	; fallthrough
+; 501
+
+FadeIn: ; 501
+	push de
+	ld a, [hld]
+	ld d, a
+	ld a, [hld]
+	ld e, a
+	call DmgToCgbObjPals
+	ld a, [hld]
+	call DmgToCgbBGPals
+	ld c, 8
+	call DelayFrames
+	pop de
+	dec b
+	jr nz, FadeIn
+	ret
+; 517
+
+
+; 517
+IncGradGBPalTable_00: db %11111111, %11111111, %11111111
+IncGradGBPalTable_01: db %11111110, %11111110, %11111110
+IncGradGBPalTable_02: db %11111001, %11111001, %11111001
+IncGradGBPalTable_03: db %11100100, %11100100, %11100100
+IncGradGBPalTable_04: db %11100100, %11100100, %11100100
+IncGradGBPalTable_05: db %10010000, %10010000, %10010000
+IncGradGBPalTable_06: db %01000000, %01000000, %01000000
+IncGradGBPalTable_07: db %00000000, %00000000, %00000000
+;                           bgp       obp1       obp2
+IncGradGBPalTable_08: db %11111111, %11111111, %11111111
+IncGradGBPalTable_09: db %11111110, %11111110, %11111000
+IncGradGBPalTable_10: db %11111001, %11100100, %11100100
+IncGradGBPalTable_11: db %11100100, %11010000, %11100000
+IncGradGBPalTable_12: db %11100100, %11010000, %11100000
+IncGradGBPalTable_13: db %10010000, %10000000, %10010000
+IncGradGBPalTable_14: db %01000000, %01000000, %01000000
+IncGradGBPalTable_15: db %00000000, %00000000, %00000000
+; 547
+