if no b/a area enabled some speed up when opening images

rtengine/colortemp.h

@@ -0,0 +1,57 @@
+/*
+ *  This file is part of RawTherapee.
+ *
+ *  Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
+ *
+ *  RawTherapee is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ * 
+ *  RawTherapee is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _COLORTEMP_
+#define _COLORTEMP_
+
+#include <math.h>
+
+namespace rtengine {
+
+#define MINTEMP 1200
+#define MAXTEMP 12000
+#define MINGREEN 0.02
+#define MAXGREEN 5.0
+
+class ColorTemp {
+
+    private:
+        double temp;
+        double green;
+
+        static void clip (double &temp, double &green);
+        
+    public:
+    
+        ColorTemp () : temp(-1), green(-1) {}
+        ColorTemp (double t, double g);
+        ColorTemp (double mulr, double mulg, double mulb) { mul2temp (mulr, mulg, mulb, temp, green); }
+        
+        inline double getTemp ()    { return temp;  }
+        inline double getGreen ()   { return green; }
+        
+        void   getMultipliers (double &mulr, double &mulg, double &mulb) { temp2mul (temp, green, mulr, mulg, mulb); }
+
+  static void mul2temp (double rmul, double gmul, double bmul, double& temp, double& green);
+  static void temp2mul (double temp, double green, double& rmul, double& gmul, double& bmul);
+
+        bool operator== (const ColorTemp& other) { return fabs(temp-other.temp)<1e-10 && fabs(green-other.green)<1e-10; }
+        bool operator!= (const ColorTemp& other) { return !(*this==other); }
+};
+};
+#endif