Further compression and png work.

src/compression/DeflateEncoder.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include "AbstractEncoder.h"
+
+#include <vector>
+#include <memory>
+
+class DeflateBlock;
+
+class DeflateEncoder : public AbstractEncoder
+{
+public:
+    DeflateEncoder(BitStream* inputStream, BitStream* outputStream);
+
+    ~DeflateEncoder();
+
+    bool encode() override;
+
+    bool decode() override;
+
+private:
+    std::vector<std::unique_ptr<DeflateBlock > > mBlocks;
+};
+
+