Add place_graphic.asm

2 files changed, 56 insertions, 2 deletions

diff --git a/engine/gfx/place_graphic.asm b/engine/gfx/place_graphic.asm
new file mode 100755
index 00000000..4092ad35
--- /dev/null
+++ b/engine/gfx/place_graphic.asm
@@ -0,0 +1,55 @@
+PlaceGraphic:
+; Fill wBoxAlignment-aligned box width b height c
+; with iterating tile starting from hGraphicStartTile at hl.
+
+	ld de, SCREEN_WIDTH
+
+	ld a, [wBoxAlignment]
+	and a
+	jr nz, .right
+
+	ldh a, [hGraphicStartTile]
+.x1
+	push bc
+	push hl
+
+.y1
+	ld [hl], a
+	add hl, de
+	inc a
+	dec c
+	jr nz, .y1
+
+	pop hl
+	inc hl
+	pop bc
+	dec b
+	jr nz, .x1
+	ret
+
+.right
+; Right-aligned.
+	push bc
+	ld b, 0
+	dec c
+	add hl, bc
+	pop bc
+
+	ldh a, [hGraphicStartTile]
+.x2
+	push bc
+	push hl
+
+.y2
+	ld [hl], a
+	add hl, de
+	inc a
+	dec c
+	jr nz, .y2
+
+	pop hl
+	dec hl
+	pop bc
+	dec b
+	jr nz, .x2
+	ret
diff --git a/main.asm b/main.asm
index 939cb5ae..e271f1c5 100644
--- a/main.asm
+++ b/main.asm
@@ -354,9 +354,8 @@ PlayBattleMusic::
 	dr $44556, $445f2
 ClearBattleRAM::
 	dr $445f2, $44648
-PlaceGraphic::
-	dr $44648, $44679
 
+INCLUDE "engine/gfx/place_graphic.asm"
 INCLUDE "engine/pokemon/mail.asm"