code: private CoverageDataSourcePixel getSourceMinAndMax(float source,
  			int sourceFloor, float valueLocation) {
  
  		int min = sourceFloor;
  		int max = sourceFloor;
  		float offset;
  		if (source < valueLocation) {
  			min--;
  			offset = 1.0f - (valueLocation - source);
  		} else {
  			max++;
  			offset = source - valueLocation;
  		}
  
  		return new CoverageDataSourcePixel(source, min, max, offset);
  	}
docs: Get the min, max, and offset of the source pixel
  
  @param source
  source pixel
  @param sourceFloor
  source floor value
  @param valueLocation
  value location
  @return source pixel information