Commited current state to allow tests. Expect colour casts when changin demosaic method or pixelshift frame. In this case, just reload the image

rtengine/rt_math.h

@@ -74,6 +74,13 @@ inline const _Tp& max(const _Tp& a, const _Tp& b, const _Tp& c, const _Tp& d)
     return std::max(d, std::max(c, std::max(a, b)));
 }
 
+template<typename _Tp>
+inline const _Tp& max(const _Tp& a, const _Tp& b, const _Tp& c, const _Tp& d, const _Tp& e)
+{
+    return max(max(a,b,c),std::max(d,e));
+}
+
+
 template<typename _Tp>
 inline _Tp intp(_Tp a, _Tp b, _Tp c)
 {