pokecrystal-board/macros/gfx.asm
vulcandth 3648afda16
RGBDS syntax updates (#905)
New MACRO and DEF syntax
2022-06-06 17:25:42 -04:00

59 lines
1.3 KiB
NASM

MACRO assert_valid_rgb
rept _NARG
assert 0 <= (\1) && (\1) <= 31, "RGB channel must be 0-31"
shift
endr
ENDM
MACRO RGB
rept _NARG / 3
assert_valid_rgb \1, \2, \3
dw palred (\1) + palgreen (\2) + palblue (\3)
shift 3
endr
ENDM
DEF palred EQUS "(1 << 0) *"
DEF palgreen EQUS "(1 << 5) *"
DEF palblue EQUS "(1 << 10) *"
DEF palettes EQUS "* PALETTE_SIZE"
DEF palette EQUS "+ PALETTE_SIZE *"
DEF color EQUS "+ PAL_COLOR_SIZE *"
DEF tiles EQUS "* LEN_2BPP_TILE"
DEF tile EQUS "+ LEN_2BPP_TILE *"
; extracts the middle two colors from a 2bpp binary palette
; example usage:
; INCBIN "foo.gbcpal", middle_colors
DEF middle_colors EQUS "PAL_COLOR_SIZE, PAL_COLOR_SIZE * 2"
MACRO dbpixel
if _NARG >= 4
; x tile, y tile, x pixel, y pixel
db \1 * TILE_WIDTH + \3, \2 * TILE_WIDTH + \4
else
; x tile, y tile
db \1 * TILE_WIDTH, \2 * TILE_WIDTH
endc
ENDM
MACRO ldpixel
if _NARG >= 5
; register, x tile, y tile, x pixel, y pixel
lb \1, \2 * TILE_WIDTH + \4, \3 * TILE_WIDTH + \5
else
; register, x tile, y tile
lb \1, \2 * TILE_WIDTH, \3 * TILE_WIDTH
endc
ENDM
DEF depixel EQUS "ldpixel de,"
DEF bcpixel EQUS "ldpixel bc,"
MACRO dbsprite
; x tile, y tile, x pixel, y pixel, vtile offset, attributes
db (\2 * TILE_WIDTH) % $100 + \4, (\1 * TILE_WIDTH) % $100 + \3, \5, \6
ENDM