Handle white out transition from overworld (incl. battle) to game menu (#27)

constants/script_constants.asm

@@ -333,5 +333,6 @@ DEF NUM_BOARD_EVENTS EQU const_value - 1
 
 ; exitoverworld arguments
 	const_def
-	const ABANDONED_LEVEL ; 0
-	const CLEARED_LEVEL   ; 1
+	const ABANDONED_LEVEL     ; 0
+	const CLEARED_LEVEL       ; 1
+	const WHITED_OUT_IN_LEVEL ; 2

engine/board/menu.asm

@@ -57,6 +57,7 @@ BoardMenuScript::
 .exit:
 	wait 300
 	exitoverworld ABANDONED_LEVEL
+	endall
 
 .ConfirmExitText:
 	text "Abandon level and"

engine/board/spaces.asm

@@ -55,7 +55,7 @@ EndSpaceScript::
 	callasm .FadeOutSlow ; 800 ms
 	wait 400
 	exitoverworld CLEARED_LEVEL
-	end
+	endall
 
 .FadeOutSlow:
 ; clear spaces left sprites

engine/events/whiteout.asm

@@ -15,10 +15,8 @@ Script_Whiteout:
 	checkflag ENGINE_BUG_CONTEST_TIMER
 	iftrue .bug_contest
 	callasm HalveCoins
-	callasm GetWhiteoutSpawn
 	farscall Script_AbortBugContest
-	special WarpToSpawnPoint
-	newloadmap MAPSETUP_WARP
+	exitoverworld WHITED_OUT_IN_LEVEL
 	endall
 
 .bug_contest
@@ -32,9 +30,17 @@ OverworldBGMap:
 	call ClearPalettes
 	call ClearScreen
 	call WaitBGMap2
-	call HideSprites
+	call DisableOverworldHUD
+	xor a
+	ld [wDisplaySecondarySprites], a
+	farcall ClearSpriteAnims
+	call ClearSprites
+	call LoadStandardFont
+	call LoadFrame
 	call RotateThreePalettesLeft
-	ret
+	ld a, FALSE
+	ld [wText2bpp], a
+	jp SpeechTextbox1bpp
 
 BattleBGMap:
 	ld b, CGB_BATTLE_GRAYSCALE

engine/overworld/scripting.asm

@@ -1157,6 +1157,8 @@ Script_loadtrainer:
 
 Script_startbattle:
 	call DisableOverworldHUD
+	ld a, FALSE
+	ld [wText2bpp], a
 	call BufferScreen
 	predef StartBattle
 	ld a, [wBattleResult]
@@ -1175,6 +1177,8 @@ Script_reloadmapafterbattle:
 	ld hl, wBattleScriptFlags
 	ld d, [hl]
 	ld [hl], 0
+	ld a, TRUE
+	ld [wText2bpp], a
 	ld a, [wBattleResult]
 	and ~BATTLERESULT_BITMASK
 	cp LOSE