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https://github.com/Orama-Interactive/Pixelorama.git
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39 lines
743 B
GDScript3
39 lines
743 B
GDScript3
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extends Node
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class LSB_LZWBitPacker:
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var bit_index: int = 0
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var byte: int = 0
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var chunks: PoolByteArray = PoolByteArray([])
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func get_bit(value: int, index: int) -> int:
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return (value >> index) & 1
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func set_bit(value: int, index: int) -> int:
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return value | (1 << index)
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func put_byte():
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chunks.append(byte)
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bit_index = 0
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byte = 0
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func write_bits(value: int, bits_count: int) -> void:
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for i in range(bits_count):
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if self.get_bit(value, i) == 1:
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byte = self.set_bit(byte, bit_index)
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bit_index += 1
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if bit_index == 8:
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self.put_byte()
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func pack() -> PoolByteArray:
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if bit_index != 0:
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self.put_byte()
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return chunks
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func reset() -> void:
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bit_index = 0
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byte = 0
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chunks = PoolByteArray([])
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