Clipless and fast DCP color profile engine

see issue #1295

rtengine/dcp.h

@@ -0,0 +1,76 @@
+/*
+*  This file is part of RawTherapee.
+*
+*  Copyright (c) 2012 Oliver Duis <www.oliverduis.de>
+*
+*  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 _DCP_
+#define _DCP_
+
+#include "imagefloat.h"
+#include <glibmm.h>
+#include <map>
+#include <string>
+
+namespace rtengine {
+
+    class DCPProfile {
+        struct HSBModify
+        {
+            float fHueShift;
+            float fSatScale;
+            float fValScale;
+        };
+
+        double mColorMatrix[3][3];
+        double mXYZCAM[3][3];  // compatible to RTs xyz_cam 
+        HSBModify *aDeltas;
+
+        int iHueDivisions, iSatDivisions, iValDivisions;
+
+        int iHueStep, iValStep, iArrayCount;
+
+    public:
+        DCPProfile(Glib::ustring fname);
+        ~DCPProfile();
+
+        void Apply(Imagefloat *pImg, Glib::ustring workingSpace) const;
+        void Apply(Image16 *pImg, Glib::ustring workingSpace) const;
+    };
+
+    class DCPStore {
+        Glib::Mutex mtx;
+
+        // these contain standard profiles from RT. keys are all in uppercase, file path is value
+        std::map<Glib::ustring, Glib::ustring> fileStdProfiles;
+        
+        // Maps file name to profile as cache
+        std::map<Glib::ustring, DCPProfile*> profileCache;
+
+    public:
+        void init(Glib::ustring rtProfileDir);
+
+        bool isValidDCPFileName(Glib::ustring filename) const;
+
+        DCPProfile* getProfile(Glib::ustring filename);
+        DCPProfile* getStdProfile(Glib::ustring camShortName);
+        
+        static DCPStore* getInstance();
+    };
+
+    #define dcpStore DCPStore::getInstance()
+};
+#endif