done phase 1 code base

engine/include/pdfengine/skia_renderer.hpp

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+#pragma once
+
+#include <pdfengine/display_list.hpp>
+#include <pdfengine/graphics_state.hpp>
+
+class SkCanvas;
+
+namespace pdfengine {
+
+// A visitor that replays a DisplayList onto a Skia canvas.
+class SkiaRenderer : public CommandVisitor {
+public:
+    // Takes a pointer to an external SkCanvas. 
+    // The caller is responsible for the canvas's lifecycle.
+    explicit SkiaRenderer(SkCanvas* canvas);
+
+    void visit(const SaveStateCommand& cmd) override;
+    void visit(const RestoreStateCommand& cmd) override;
+    void visit(const SetTransformCommand& cmd) override;
+    void visit(const FillRectCommand& cmd) override;
+    void visit(const DrawTextCommand& cmd) override;
+
+    // Renders the entire display list to the canvas
+    void render(const DisplayList& displayList);
+
+private:
+    SkCanvas* m_canvas;
+    GraphicsStateStack m_stateStack;
+};
+
+} // namespace pdfengine