313 	def compileDeltaValues_(deltas):  argument
331 		while pos < len(deltas):
332 			value = deltas[pos]
334 				pos = TupleVariation.encodeDeltaRunAsZeroes_(deltas, pos, stream)
336 				pos = TupleVariation.encodeDeltaRunAsBytes_(deltas, pos, stream)
338 				pos = TupleVariation.encodeDeltaRunAsWords_(deltas, pos, stream)
342 	def encodeDeltaRunAsZeroes_(deltas, offset, stream):  argument
345 		numDeltas = len(deltas)
346 		while pos < numDeltas and runLength < 64 and deltas[pos] == 0:
354 	def encodeDeltaRunAsBytes_(deltas, offset, stream):  argument
357 		numDeltas = len(deltas)
359 			value = deltas[pos]
370 			if value == 0 and pos+1 < numDeltas and deltas[pos+1] == 0:
377 			stream.write(struct.pack('b', otRound(deltas[i])))
381 	def encodeDeltaRunAsWords_(deltas, offset, stream):  argument
384 		numDeltas = len(deltas)
386 			value = deltas[pos]
404 			if isByteEncodable(value) and pos+1 < numDeltas and isByteEncodable(deltas[pos+1]):
411 			stream.write(struct.pack('>h', otRound(deltas[i])))
427 					deltas = array.array("h")
430 					deltas = array.array("b")
432 				deltas.fromstring(data[pos:pos+deltasSize])
433 				if sys.byteorder != "big": deltas.byteswap()
434 				assert len(deltas) == numDeltasInRun
436 				result.extend(deltas)
591 	deltas = [None] * pointCount
598 				deltas[p] = delta
607 				deltas[p] = (x, y)
609 	return TupleVariation(axes, deltas)