Add cairo interface.

src/graphics/cairo/CairoDrawingSurface.cpp

@@ -0,0 +1,31 @@
+#include "CairoDrawingSurface.h"
+
+CairoDrawingSurface::CairoDrawingSurface(cairo_surface_t* surface)
+    : mNativeSurface(surface)
+{
+
+}
+
+CairoDrawingSurface::~CairoDrawingSurface()
+{
+    DestroyNativeSurface();
+}
+
+std::unique_ptr<CairoDrawingSurface> CairoDrawingSurface::Create(cairo_surface_t* surface)
+{
+    return std::make_unique<CairoDrawingSurface>(surface);
+}
+
+cairo_surface_t* CairoDrawingSurface::GetNativeSurface()
+{
+    return mNativeSurface;
+}
+
+void CairoDrawingSurface::DestroyNativeSurface()
+{
+    if (mNativeSurface)
+    {
+        cairo_surface_destroy (mNativeSurface);
+        mNativeSurface = nullptr;
+    }
+}