76 lines
2.2 KiB
GDScript3
76 lines
2.2 KiB
GDScript3
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var INDEX_FORMAT := globals.INDEX_FORMAT
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static func ByteArray(size: int) -> PoolByteArray:
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var arr := PoolByteArray()
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arr.resize(size)
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return arr
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static func mode7_to_tile(data: PoolByteArray) -> Image:
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# Easy one, it's just straight data left-to-right, top-to-bottom
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var tile := Image.new()
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tile.create_from_data(8, 8, false, Image.FORMAT_L8, data)
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return tile
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static func mode7_compressed_to_tile(data: PoolByteArray, tile_palette: int = 0) -> Image:
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# 4 bits per pixel.
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var tdata := ByteArray(64)
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for i in 32:
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var b := data[i]
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var j: int = i*2
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tdata[j] = (b & 0x0F) | tile_palette
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tdata[j+1] = (b >> 4) | tile_palette
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return mode7_to_tile(tdata)
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static func _4plane_to_tile(data: PoolByteArray) -> Image:
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var tdata := ByteArray(64)
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for i in range(64):
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var j = (i/8)*2
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var x = 7 - (i%8)
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tdata[i] = (data[j] >> x & 1) | ((data[j+1] >> x & 1)<<1) | ((data[j+16] >> x & 1)<<2) | ((data[j+17] >> x & 1)<<3)
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var tile := Image.new()
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tile.create_from_data(8, 8, false, Image.FORMAT_L8, tdata)
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return tile
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static func _3plane_to_tile(data: PoolByteArray) -> Image:
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var tdata := ByteArray(64)
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for i in range(64):
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var j = (i/8)*2
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var x = 7 - (i%8)
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tdata[i] = (data[j] >> x & 1) | ((data[j+1] >> x & 1)<<1) | ((data[(i/8)+16] >> x & 1)<<2)
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var tile := Image.new()
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tile.create_from_data(8, 8, false, Image.FORMAT_L8, tdata)
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return tile
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static func _2plane_to_tile(data: PoolByteArray) -> Image:
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var tdata := ByteArray(64)
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for i in range(64):
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var j = (i/8)*2
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var x = 7 - (i%8)
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tdata[i] = (data[j] >> x & 1) | ((data[j+1] >> x & 1)<<1)
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var tile := Image.new()
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tile.create_from_data(8, 8, false, Image.FORMAT_L8, tdata)
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return tile
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static func _1plane_to_tile(data: PoolByteArray) -> Image:
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var tdata := ByteArray(64)
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for i in range(64):
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var x = 7 - (i%8)
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tdata[i] = (data[i/8] >> x & 1)
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var tile := Image.new()
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tile.create_from_data(8, 8, false, Image.FORMAT_L8, tdata)
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return tile
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static func get_tile(rom: File, offset: int, length: int) -> Image:
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rom.seek(offset)
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var data := rom.get_buffer(length)
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var planes := length / 8
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match planes:
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4:
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return _4plane_to_tile(data)
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3:
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return _3plane_to_tile(data)
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2:
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return _2plane_to_tile(data)
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_:
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return _1plane_to_tile(data)
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