Attempt xcb image put.

src/image/Image.h

@@ -29,12 +29,28 @@ public:
     void setBitDepth(unsigned bitDepth);
     void setNumChannels(unsigned numChannels);
 
-private:
     void initialize();
 
+    const T* getDataPtr() const
+    {
+        return mData.data();
+    }
+
+    const std::vector<T>& getDataRef() const
+    {
+        return mData;
+    }
+
+    std::vector<T> getData() const
+    {
+        return mData;
+    }
+
+private:
+
     unsigned mWidth{1};
     unsigned mHeight{1};
     unsigned mBitDepth{8};
-    unsigned mNumChannels{1};
+    unsigned mNumChannels{4};
     std::vector<T> mData;
 };