imagedata: report if file is DNG

rtengine/imagedata.cc

@@ -565,6 +565,8 @@ FramesData::FramesData(const Glib::ustring &fname, time_t ts) :
 
         meta.getDimensions(w_, h_);
 
+        isDNG = find_exif_tag("Exif.Image.DNGVersion");
+
         // -----------------------
         // Special file type detection (HDR, PixelShift)
         // ------------------------
@@ -778,6 +780,11 @@ bool FramesData::getHDR() const
     return isHDR;
 }
 
+bool FramesData::getDNG() const
+{
+    return isDNG;
+}
+
 std::string FramesData::getImageType() const
 {
     return isPixelShift ? "PS" : isHDR ? "HDR" : "STD";

rtengine/imagedata.h

@@ -59,6 +59,7 @@ private:
     time_t modTimeStamp;
     bool isPixelShift;
     bool isHDR;
+    bool isDNG;
     int w_;
     int h_;
 
@@ -69,6 +70,7 @@ public:
     unsigned int getFrameCount() const override;
     bool getPixelShift() const override;
     bool getHDR() const override;
+    bool getDNG() const override;
     std::string getImageType() const override;
     IIOSampleFormat getSampleFormat() const override;
     bool hasExif() const override;

rtengine/rtengine.h

@@ -130,6 +130,8 @@ public:
     virtual bool getPixelShift () const = 0;
     /** @return false: not an HDR file ; true: single or multi-frame HDR file (e.g. Pentax HDR raw file or 32 bit float DNG file or Log compressed) */
     virtual bool getHDR() const = 0;
+    /** @return true if the file is a DNG file */
+    virtual bool getDNG() const = 0;
 
     /** @return false: not an HDR file ; true: single or multi-frame HDR file (e.g. Pentax HDR raw file or 32 bit float DNG file or Log compressed) */
     virtual std::string getImageType() const = 0;

rtgui/cacheimagedata.cc

@@ -59,6 +59,7 @@ CacheImageData::CacheImageData() :
     iso(0),
     rating(0),
     isHDR (false),
+    isDNG (false),
     isPixelShift (false),
     sensortype(rtengine::ST_NONE),
     sampleFormat(rtengine::IIOSF_UNKNOWN),
@@ -194,6 +195,10 @@ int CacheImageData::load (const Glib::ustring& fname)
                         isHDR = keyFile.get_boolean ("ExifInfo", "IsHDR");
                     }
 
+                    if (keyFile.has_key ("ExifInfo", "IsDNG")) {
+                        isDNG = keyFile.get_boolean ("ExifInfo", "IsDNG");
+                    }
+
                     if (keyFile.has_key ("ExifInfo", "IsPixelShift")) {
                         isPixelShift = keyFile.get_boolean ("ExifInfo", "IsPixelShift");
                     }
@@ -316,6 +321,7 @@ int CacheImageData::save (const Glib::ustring& fname)
         keyFile.set_double  ("ExifInfo", "FocusDist", focusDist);
         keyFile.set_integer ("ExifInfo", "ISO", iso);
         keyFile.set_boolean ("ExifInfo", "IsHDR", isHDR);
+        keyFile.set_boolean ("ExifInfo", "IsDNG", isDNG);
         keyFile.set_boolean ("ExifInfo", "IsPixelShift", isPixelShift);
         keyFile.set_string  ("ExifInfo", "ExpComp", expcomp);
     }

rtgui/cacheimagedata.h

@@ -60,6 +60,7 @@ public:
     unsigned iso;
     int rating;
     bool isHDR;
+    bool isDNG;
     bool isPixelShift;
     int sensortype;
     rtengine::IIO_Sample_Format sampleFormat;
@@ -114,6 +115,7 @@ public:
     int getRating () const override { return rating; } // FIXME-piotr : missing rating
     bool getPixelShift () const override { return isPixelShift; }
     bool getHDR() const override { return isHDR; }
+    bool getDNG() const override { return isDNG; }
     std::string getImageType() const override { return isPixelShift ? "PS" : isHDR ? "HDR" : "STD"; }
     rtengine::IIOSampleFormat getSampleFormat() const override { return sampleFormat; }
     void getDimensions(int &w, int &h) const override