Dump intermediate results to PNG images.

src/PNGDumper.hpp

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <string>
+#include <string_view>
+
+#include "LayerData.hpp"
+#include "utils.hpp"
+
+namespace fmri
+{
+    using std::string;
+    using std::string_view;
+
+    class PNGDumper
+    {
+    public:
+        PNGDumper(string_view baseDir);
+
+        void dump(const LayerData& layerData);
+
+    private:
+        const string baseDir_;
+
+        void dumpImageSeries(const LayerData &data);
+
+        string getFilename(const string &basic_string, int i, int j);
+    };
+}