AppWindow.h

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#pragma once
 
// ---- AppWindow (platform-abstraction layer) --------------------------------
// Owns the GLFW window lifecycle: creation, OpenGL loader (glad), window icon,
// DPI scale, event polling, buffer swap, and destruction.
//
// Follows the Gregory "Engine Support" pattern: a thin wrapper over the
// platform windowing API that the rest of the application programs against.
 
struct GLFWwindow;
 
class AppWindow
{
public:
    AppWindow() = default;
    ~AppWindow();
 
    AppWindow(const AppWindow&)            = delete;
    AppWindow& operator=(const AppWindow&) = delete;
 
    bool init(int width, int height, const char* title);
 
    void setIcon(const char* fallbackPath);
 
    float queryDpiScale() const;
 
    void pollEvents();
 
    void swapBuffers();
 
    [[nodiscard]] bool shouldClose() const;
 
    void requestClose();
 
    void framebufferSize(int& w, int& h) const;
 
    [[nodiscard]] GLFWwindow* handle() const noexcept { return m_window; }
 
private:
    GLFWwindow* m_window = nullptr;
 
    static void errorCallback(int error, const char* description);
};