ref: 9f29f21d9d43baa7124991dcf3b093fc6c615706
dir: /home/fade.asm/
; These routines manage gradual fading ; (e.g., entering a doorway) LoadGBPal:: ld a, [wd35d] ;tells if cur.map 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] ld [rBGP], a ld a, [hli] ld [rOBP0], a ld a, [hli] ld [rOBP1], a ret GBFadeOut1:: ld hl, FadePal1 ld b, 4 jr GBFadeOutCommon GBFadeOut2:: ld hl, FadePal6 ld b, 3 GBFadeOutCommon:: ld a, [hli] ld [rBGP], a ld a, [hli] ld [rOBP0], a ld a, [hli] ld [rOBP1], a ld c, 8 call DelayFrames dec b jr nz, GBFadeOutCommon ret GBFadeIn1:: ld hl, FadePal4 + 2 ld b, 4 jr GBFadeInCommon GBFadeIn2:: ld hl, FadePal7 + 2 ld b, 3 GBFadeInCommon:: ld a, [hld] ld [rOBP1], a ld a, [hld] ld [rOBP0], a ld a, [hld] ld [rBGP], a ld c, 8 call DelayFrames dec b jr nz, GBFadeInCommon ret FadePal1:: db %11111111, %11111111, %11111111 FadePal2:: db %11111110, %11111110, %11111000 FadePal3:: db %11111001, %11100100, %11100100 FadePal4:: db %11100100, %11010000, %11100000 ; rBGP rOBP0 rOBP1 FadePal5:: db %11100100, %11010000, %11100000 FadePal6:: db %10010000, %10000000, %10010000 FadePal7:: db %01000000, %01000000, %01000000 FadePal8:: db %00000000, %00000000, %00000000