shithub: pokecrystal

ref: 7676f7d22edae31996e0651e608b2b60dfa5da0b
dir: /engine/routines/placegraphic.asm/

PlaceGraphic: ; 2ef6e
; 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

	ld 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

	ld 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