1 files changed, 75 insertions, 0 deletions
diff --git a/engine/display_text_id_init.asm b/engine/display_text_id_init.asm
new file mode 100644
index 00000000..0ef37370
--- /dev/null
+++ b/engine/display_text_id_init.asm
@@ -0,0 +1,75 @@
+; function that performs initialization for DisplayTextID
+DisplayTextIDInit:
+	xor a
+	ld [wListMenuID], a
+	ld a, [wAutoTextBoxDrawingControl]
+	bit 0, a
+	jr nz, .skipDrawingTextBoxBorder
+	ld a, [hSpriteIndexOrTextID] ; text ID (or sprite ID)
+	and a
+	jr nz, .notStartMenu
+; if text ID is 0 (i.e. the start menu)
+; Note that the start menu text border is also drawn in the function directly
+; below this, so this seems unnecessary.
+	CheckEvent EVENT_GOT_POKEDEX
+; start menu with pokedex
+	coord hl, 10, 0
+	lb bc, 14, 8
+	jr nz, .drawTextBoxBorder
+; start menu without pokedex
+	coord hl, 10, 0
+	lb bc, 12, 8
+	jr .drawTextBoxBorder
+; if text ID is not 0 (i.e. not the start menu) then do a standard dialogue text box
+.notStartMenu
+	coord hl, 0, 12
+	lb bc, 4, 18
+.drawTextBoxBorder
+	call TextBoxBorder
+.skipDrawingTextBoxBorder
+	ld hl, wFontLoaded
+	set 0, [hl]
+	ld hl, wFlags_0xcd60
+	bit 4, [hl]
+	res 4, [hl]
+	jr nz, .skipMovingSprites
+	call UpdateSprites
+.skipMovingSprites
+; loop to copy C1X9 (direction the sprite is facing) to C2X9 for each sprite
+; this is done because when you talk to an NPC, they turn to look your way
+; the original direction they were facing must be restored after the dialogue is over
+	ld hl, wSpriteStateData1 + $19
+	ld c, $0f
+	ld de, $0010
+.spriteFacingDirectionCopyLoop
+	ld a, [hl]
+	inc h
+	ld [hl], a
+	dec h
+	add hl, de
+	dec c
+	jr nz, .spriteFacingDirectionCopyLoop
+; loop to force all the sprites in the middle of animation to stand still
+; (so that they don't like they're frozen mid-step during the dialogue)
+	ld hl, wSpriteStateData1 + 2
+	ld de, $0010
+	ld c, e
+.spriteStandStillLoop
+	ld a, [hl]
+	cp $ff ; is the sprite visible?
+	jr z, .nextSprite
+; if it is visible
+	and $fc
+	ld [hl], a
+.nextSprite
+	add hl, de
+	dec c
+	jr nz, .spriteStandStillLoop
+	ld b, $9c ; window background address
+	call CopyScreenTileBufferToVRAM ; transfer background in WRAM to VRAM
+	xor a
+	ld [hWY], a ; put the window on the screen
+	call LoadFontTilePatterns
+	ld a, $01
+	ld [H_AUTOBGTRANSFERENABLED], a ; enable continuous WRAM to VRAM transfer each V-blank
+	ret