move into firmware subfolder

Signed-off-by: Peter Siegmund <developer@mars3142.org>

firmware/src/manager/ResourceManager.h

@@ -0,0 +1,59 @@
+#pragma once
+
+#include <mutex>
+#include <string>
+#include <unordered_map>
+
+#include <SDL3/SDL.h>
+
+class ResourceManager
+{
+public:
+    /**
+     * @brief Returns the singleton instance of the ResourceManager
+     * @return Reference to the ResourceManager instance
+     */
+    static ResourceManager &Instance();
+
+    ResourceManager(const ResourceManager &) = delete;
+    ResourceManager &operator=(const ResourceManager &) = delete;
+    ResourceManager(ResourceManager &&) = delete;
+    ResourceManager &operator=(ResourceManager &&) = delete;
+
+    ~ResourceManager();
+
+    /**
+     * @brief Loads a texture or returns an already loaded texture
+     * @param renderer The SDL_Renderer used to load the texture
+     * @param path Path to the texture file (relative to resource directory)
+     * @return Pointer to the loaded SDL_Texture or nullptr on error
+     *
+     * This function implements a caching system for textures. If a texture
+     * has already been loaded, it returns it from the cache. Otherwise,
+     * it loads the texture and stores it in the cache. Access is thread-safe
+     * through mutex protection.
+     */
+    SDL_Texture *GetTextureByName(SDL_Renderer *renderer, const std::string &path);
+
+private:
+    /**
+     * @brief Constructor for the ResourceManager
+     * Initializes a new instance and logs its creation
+     */
+    ResourceManager();
+
+    /**
+     * @brief Determines the full resource path for a file
+     * @param fileName Name of the resource file
+     * @return Complete path to the resource
+     *
+     * This function handles platform-specific paths (especially macOS) and
+     * constructs the correct path to resources. For macOS, it considers the
+     * bundle structure (.app/Contents/Resources/).
+     */
+    static std::string GetResourcePath(const std::string &fileName);
+
+    std::unordered_map<std::string, SDL_Texture *> m_textures;
+
+    mutable std::mutex m_mutex;
+};