pokecrystal-board/engine/place_graphics.asm
2017-12-15 21:22:26 -05:00

57 lines
592 B
NASM

PlaceGraphic: ; 2ef6e
; Fill wBoxAlignment-aligned box width b height c
; with iterating tile starting from hGraphicStartTile at hl.
; Predef $13
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