MTLAttributeFormat.char4 A four-component vector with 8-bit, signed integer values. Declarationcase char4 See Also8-bit integer formatsMTLAttributeFormat.charMTLAttributeFormat.char2MTLAttributeFormat.char3MTLAttributeFormat.ucharMTLAttributeFormat.uchar2MTLAttributeFormat.uchar3MTLAttributeFormat.uchar4