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extends Reference
class LSBLZWBitPacker:
var bit_index: int = 0
var stream: int = 0
var chunks: PoolByteArray = PoolByteArray([])
func put_byte():
chunks.append(stream & 0xff)
bit_index -= 8
stream >>= 8
func write_bits(value: int, bits_count: int) -> void:
value &= (1 << bits_count) - 1
value <<= bit_index
stream |= value
bit_index += bits_count
while bit_index >= 8:
self.put_byte()
func pack() -> PoolByteArray:
if bit_index != 0:
self.put_byte()
return chunks
func reset() -> void:
bit_index = 0
stream = 0
chunks = PoolByteArray([])
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