Got it almost working...

src/graphics/Label.hpp

@@ -23,6 +23,11 @@
 
 #include <cstdint>
 #include <string>
+#include <vector>
+
+#include "cairo.h"
+#include "pango/pango-font.h"
+#include "pango/pango-types.h"
 
 namespace ptprnt::graphics {
 
@@ -39,15 +44,21 @@ class Label {
     Label(Label&&)                 = delete;
     Label& operator=(Label&&)      = delete;
 
-    uint8_t* getRaw();
-    void createLabel(const std::string& labelText);
+    std::vector<uint8_t> getRaw();
+    void create(const std::string& labelText, const uint16_t heightPixel);
+    void writeToPng(const std::string& file);
+    int getLayoutWidth();
+    int getLayoutHeight();
 
    private:
     // methods
     uint8_t getNumLines(std::string_view str);
     // members
-    PangoLayout* mLayout;
-    PangoFontDescription* mFontDescription;
-    cairo_surface_t* mSurface;
+    PangoContext* mPangoCtx{nullptr};
+    PangoLayout* mPangoLyt{nullptr};
+    PangoFontDescription* mPangoFontDesc{nullptr};
+    cairo_surface_t* mSurface{nullptr};
+    int mLayoutWidth = 0, mLayoutHeight = 0;
+    int mPrinterHeight = 0;
 };
 }  // namespace ptprnt::graphics