mirror of
https://gitlab.com/xCrystal/pokecrystal-board.git
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101 lines
2.7 KiB
NASM
101 lines
2.7 KiB
NASM
; Graphics macros
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DEF palred EQUS "(1 << 0) *"
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DEF palgreen EQUS "(1 << 5) *"
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DEF palblue EQUS "(1 << 10) *"
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MACRO assert_valid_rgb
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rept _NARG
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assert 0 <= (\1) && (\1) <= 31, "RGB channel must be 0-31"
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shift
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endr
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ENDM
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MACRO RGB
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rept _NARG / 3
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assert_valid_rgb \1, \2, \3
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dw palred (\1) + palgreen (\2) + palblue (\3)
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if DEF(fade_src)
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DEF {fade_src}_{d:color_index} EQU \1
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DEF color_index += 1
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DEF {fade_src}_{d:color_index} EQU \2
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DEF color_index += 1
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DEF {fade_src}_{d:color_index} EQU \3
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DEF color_index += 1
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endc
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shift 3
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endr
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ENDM
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MACRO rgbpals_fade_src
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; \1: name of fade source
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DEF fade_src EQUS \1
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DEF color_index = 0
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ENDM
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MACRO rgbpals_fade_src_end
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DEF {fade_src}_len = color_index
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PURGE fade_src
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ENDM
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MACRO rgbpals_fade_apply
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; \1: name of fade source to fade from
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; \2: name of fade source to fade to
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; \3: additional intermediate fading steps
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DEF fade_from EQUS \1
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DEF fade_to EQUS \2
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assert {fade_from}_len == {fade_to}_len, "fade_from pals and fade_to pals must be same length"
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for i, 0, \3
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for j, 0, {fade_from}_len, 3
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DEF rgbch_red = {j} + 0
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DEF rgbch_green = {j} + 1
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DEF rgbch_blue = {j} + 2
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DEF palred_value = {fade_from}_{d:rgbch_red} + ({fade_to}_{d:rgbch_red} - {fade_from}_{d:rgbch_red}) * (i + 1) / (\3 + 1)
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DEF palgreen_value = {fade_from}_{d:rgbch_green} + ({fade_to}_{d:rgbch_green} - {fade_from}_{d:rgbch_green}) * (i + 1) / (\3 + 1)
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DEF palblue_value = {fade_from}_{d:rgbch_blue} + ({fade_to}_{d:rgbch_blue} - {fade_from}_{d:rgbch_blue}) * (i + 1) / (\3 + 1)
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dw palred (palred_value) + palgreen (palgreen_value) + palblue (palblue_value)
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endr
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endr
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PURGE fade_from, fade_to, rgbch_red, rgbch_green, rgbch_blue, palred_value, palgreen_value, palblue_value
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ENDM
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DEF palettes EQUS "* PALETTE_SIZE"
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DEF palette EQUS "+ PALETTE_SIZE *"
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DEF color EQUS "+ PAL_COLOR_SIZE *"
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DEF tiles EQUS "* LEN_2BPP_TILE"
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DEF tile EQUS "+ LEN_2BPP_TILE *"
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; extracts the middle two colors from a 2bpp binary palette
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; example usage:
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; INCBIN "foo.gbcpal", middle_colors
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DEF middle_colors EQUS "PAL_COLOR_SIZE, PAL_COLOR_SIZE * 2"
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MACRO dbpixel
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if _NARG >= 4
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; x tile, y tile, x pixel, y pixel
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db \1 * TILE_WIDTH + \3, \2 * TILE_WIDTH + \4
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else
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; x tile, y tile
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db \1 * TILE_WIDTH, \2 * TILE_WIDTH
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endc
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ENDM
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MACRO ldpixel
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if _NARG >= 5
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; register, x tile, y tile, x pixel, y pixel
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lb \1, \2 * TILE_WIDTH + \4, \3 * TILE_WIDTH + \5
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else
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; register, x tile, y tile
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lb \1, \2 * TILE_WIDTH, \3 * TILE_WIDTH
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endc
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ENDM
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DEF depixel EQUS "ldpixel de,"
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DEF bcpixel EQUS "ldpixel bc,"
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MACRO dbsprite
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; x tile, y tile, x pixel, y pixel, vtile offset, attributes
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db (\2 * TILE_WIDTH) % $100 + \4, (\1 * TILE_WIDTH) % $100 + \3, \5, \6
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ENDM
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