Pipette and "On Preview Widgets" branch. See issue 227

The pipette part is already working quite nice but need to be finished. The widgets part needs more work...

rtengine/rt_math.h

@@ -0,0 +1,70 @@
+#ifndef _MYMATH_
+#define _MYMATH_
+#include <cmath>
+#include <algorithm>
+
+
+namespace rtengine {
+	static const int MAXVAL = 0xffff;
+	static const float MAXVALF = float(MAXVAL);  // float version of MAXVAL
+	static const double MAXVALD = double(MAXVAL); // double version of MAXVAL
+
+	template <typename _Tp>
+	inline const _Tp SQR (_Tp x) {
+//		return std::pow(x,2); Slower than:
+		return (x*x);
+	}
+
+	template<typename _Tp>
+	inline const _Tp& min(const _Tp& a, const _Tp& b) {
+		return std::min(a,b);
+	}
+
+	template<typename _Tp>
+	inline const _Tp& max(const _Tp& a, const _Tp& b) {
+		return std::max(a,b);
+	}
+
+
+	template<typename _Tp>
+	inline const _Tp LIM(const _Tp& a, const _Tp& b, const _Tp& c) {
+		return std::max(b,std::min(a,c));
+	}
+
+	template<typename _Tp>
+	inline const _Tp LIM01(const _Tp& a) {
+		return std::max(_Tp(1),std::min(a,_Tp(0)));
+	}
+
+	template<typename _Tp>
+	inline const _Tp ULIM(const _Tp& a, const _Tp& b, const _Tp& c) {
+		return ((b < c) ? LIM(a,b,c) : LIM(a,c,b));
+	}
+
+	template<typename _Tp>
+	inline const _Tp CLIP(const _Tp& a) {
+		return LIM(a, static_cast<_Tp>(0), static_cast<_Tp>(MAXVAL));
+	}
+
+
+	template<typename _Tp>
+	inline const _Tp& min(const _Tp& a, const _Tp& b, const _Tp& c) {
+		return std::min(c,std::min(a,b));
+	}
+
+	template<typename _Tp>
+	inline const _Tp& max(const _Tp& a, const _Tp& b, const _Tp& c) {
+		return std::max(c,std::max(a,b));
+	}
+
+	template<typename _Tp>
+	inline const _Tp& min(const _Tp& a, const _Tp& b, const _Tp& c, const _Tp& d) {
+		return std::min(d,std::min(c,std::min(a,b)));
+	}
+
+	template<typename _Tp>
+	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)));
+	}
+}
+#endif