INCLUDE "hardware.inc"

; The address of an internal OAM entry
; @param \1 16-bit register
; @param \2 OAM index
; @param \3 offset
MACRO ld_OAM
    ld \1, _OAM + \2 * sizeof_OAM_ATTRS + \3
ENDM

; The address of an internal OAM entry's Y coordinate
MACRO ld_OAM_y
    ld_OAM \1, \2, 0
ENDM

; The address of an internal OAM entry's X coordinate
MACRO ld_OAM_x
    ld_OAM \1, \2, 1
ENDM

; The address of an internal OAM entry's tile index
MACRO ld_OAM_tile
    ld_OAM \1, \2, 2
ENDM

; The address of an internal OAM entry's attributes
MACRO ld_OAM_attr
    ld_OAM \1, \2, 3
ENDM

; Set an entry in the internal OAM (copied on next DMA)
; @param \1 OAM index
; @param \2 X coordinate
; @param \3 Y coordinate
; @param \4 Tile index
; @param \5 Attributes
MACRO OAM_set
    ld_OAM_y hl, \1
    ld a, \3
    ld [hli], a
    ld a, \2
    ld [hli], a
    ld a, \4
    ld [hli], a
    ld a, \5
    ld [hl], a
ENDM