Some encode/decode practice.

src/image/PngElements.h

@@ -0,0 +1,33 @@
+#pragma once
+
+#include <string>
+#include <sstream>
+
+
+namespace Png
+{
+    struct IHDRChunk
+    {
+        unsigned width{0};
+        unsigned height{0};
+        char bitDepth{0};
+        char colorType{0};
+        char compressionMethod{0};
+        char filterMethod{0};
+        char interlaceMethod{0};
+
+        std::string toString() const
+        {
+            std::stringstream sstr;
+            sstr << "width: " << width << "\n";
+            sstr << "height: " << height << "\n";
+            sstr << "bitDepth: " << (int)bitDepth << "\n";
+            sstr << "colorType: " << (int)colorType << "\n";
+            sstr << "compressionMethod: " << (int)compressionMethod << "\n";
+            sstr << "filterMethod: " << (int)filterMethod << "\n";
+            sstr << "interlaceMethod: " << (int)interlaceMethod << "\n";
+            return sstr.str();
+        }
+    };
+}
+