Continue png writing.

src/compression/ZlibEncoder.h

@@ -2,33 +2,54 @@
 
 #include "AbstractEncoder.h"
 
+#include "DeflateElements.h"
+
 #include <memory>
 #include <vector>
 
+class AbstractChecksumCalculator;
+
 class ZlibEncoder : public AbstractEncoder
 {
-
 public:
+
+    enum class CompressionMethod : unsigned char
+    {
+        DEFLATE = 8,
+    };
+
+    enum class CompressionLevel : unsigned char
+    {
+        FASTEST,
+        FAST,
+        DEFAULT,
+        MAX_COMPRESSION
+    };
+
     ZlibEncoder(BitStream* inputStream, BitStream* outputStream);
     ~ZlibEncoder();
 
-    void setCompressionMethod(unsigned char method);
-
-    void setExtraFlags(unsigned char extraFlags);
+    void setWindowSize(unsigned size);
 
     bool encode() override;
-
     bool decode() override;
 
-private:
-    unsigned char mCmf{0};
-    unsigned char mFlg{0};
-    unsigned char mCompressionMethod{8};
-    unsigned char mCompressionInfo{0};
-    unsigned char mFlagCheck{0};
-    unsigned char mFlagDict{0};
-    unsigned char mFlagLevel{0};
-    unsigned char mCheckValue{0};
+    std::string getData() const;
+    std::string toString(CompressionLevel level) const;
+    std::string toString(CompressionMethod method) const;
 
+private:
+    void parseCompressionMethod(unsigned char method);
+    void parseExtraFlags(unsigned char extraFlags);
+
+    CompressionMethod mCompressionMethod{CompressionMethod::DEFLATE};
+    Deflate::CompressionMethod mDeflateCompressionMethod{Deflate::CompressionMethod::NONE};
+    unsigned mWindowSize{32768}; // Window size, n in 2^(n+8) bytes
+
+    unsigned char mFlagCheck{0};
+    bool mUseDictionary{false};
+    CompressionLevel mFlagLevel{CompressionLevel::DEFAULT};
+
+    std::unique_ptr<AbstractChecksumCalculator> mChecksumCalculator;
     std::unique_ptr<AbstractEncoder> mWorkingEncoder;
 };