Add C=f(C) curve and fixed some bugs

rtengine/curves.cc

@@ -429,6 +429,24 @@ void CurveFactory::curveLocal (bool & locallutili, const std::vector<double>& cu
 
 }
 
+void CurveFactory::curveCCLocal (bool & localcutili, const std::vector<double>& curvePoints, LUTf & LocalCCurve, int skip)
+{
+    bool needed = false;
+    std::unique_ptr<DiagonalCurve> dCurve;
+
+    if (!curvePoints.empty() && curvePoints[0] != 0) {
+        dCurve = std::unique_ptr<DiagonalCurve> (new DiagonalCurve (curvePoints, CURVES_MIN_POLY_POINTS / skip));
+
+        if (dCurve && !dCurve->isIdentity()) {
+            needed = true;
+            localcutili = true;
+        }
+    }
+
+    fillCurveArray (dCurve.get(), LocalCCurve, skip, needed);
+    //LocalLCurve.dump("wav");
+
+}
 
 
 void CurveFactory::localLCurve (double br, double contr, /*const std::vector<double>& curvePoints,*/