pokered/engine/display_text_id_init.asm
2016-09-17 18:17:57 -07:00

78 lines
2 KiB
NASM

; 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
ld b,$0e
ld c,$08
jr nz,.drawTextBoxBorder
; start menu without pokedex
coord hl, 10, 0
ld b,$0c
ld c,$08
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
ld b,$04
ld c,$12
.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,$0010
ld c,e
.spriteStandStillLoop
ld a,[hl]
cp a,$ff ; is the sprite visible?
jr z,.nextSprite
; if it is visible
and a,$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