add image class serialization

src/image.h

@@ -1,12 +1,25 @@
 #pragma once
+#include "serializer.h"
 
-class Image
+class Image : public Serializer::Type
 {
 public:
     std::unique_ptr<uint8_t[]> m_data;
+    std::string file_name;
+    std::string file_base;
+    std::string file_ext;
     int width = 0;
     int height = 0;
     int comp = 4;
+    Image() = default;
+    Image(const Serializer::VMArray::ImageData& d)
+    {
+        m_data = std::make_unique<uint8_t[]>(d.size);
+        std::copy_n(d.data.get(), d.size, m_data.get());
+        width = d.width;
+        height = d.height;
+        comp = d.comp;
+    }
     bool load(std::string filename);
     bool load_file(std::string filename);
     const uint8_t* data() const { return m_data.get(); }
@@ -18,6 +31,7 @@ public:
         width = w; 
         height = h;  
         comp = 4;
+        file_base = file_name = file_ext = "";
         m_data = data ? std::unique_ptr<uint8_t[]>(data) : std::make_unique<uint8_t[]>(size());
     }
     void copy_from(const uint8_t* data)
@@ -29,6 +43,7 @@ public:
         width = 0;
         height = 0;
         comp = 0;
+        file_base = file_name = file_ext = "";
         m_data.reset();
     }
     void flip();
@@ -38,4 +53,6 @@ public:
     Image resize(int w, int h) const;
     Image resize_power2() const;
     Image resize_squared(const glm::u8vec4& bg) const;
+    bool read(BinaryStreamReader& r) override;
+    void write(BinaryStreamWriter& w) const override;
 };