Class HostBackend

src/host/host_backend.h:38–60

Abstract windowing/GL host. A backend owns the OS window, the GL context, input polling, and the per-frame boundaries. No Qt, no ImGui here.

/// Abstract windowing/GL host. A backend owns the OS window, the GL context,
/// input polling, and the per-frame boundaries. No Qt, no ImGui here.
class HostBackend {
  public:
    virtual ~HostBackend() = default;

    /// Create the window + current GL context. Returns false on failure.
    virtual bool initialize(const char* title, int width, int height) = 0;

    /// Pump OS/input events for one frame.
    virtual void poll_events() = 0;

    /// True once the user/OS has requested the window close.
    [[nodiscard]] virtual bool should_close() const = 0;

    [[nodiscard]] virtual FramebufferSize framebuffer_size() const = 0;

    /// Make context current, set viewport to the framebuffer size, clear.
    virtual void begin_frame() = 0;

    /// Present the frame (swap buffers).
    virtual void end_frame() = 0;

    virtual void shutdown() = 0;
};

} // namespace oid::host