* input is assumed to be unsigned linear color values that represent
* the range 0-1. In the case of IEEE values, the 0-1 range is assumed to
* be the normal linear color range, in addition over 1 values are
* input is assumed to be unsigned linear color values that represent
* the range 0-1. In the case of IEEE values, the 0-1 range is assumed to
* be the normal linear color range, in addition over 1 values are