2 files changed, 110 insertions, 0 deletions
diff --git a/src/core/hdri_manager.cpp b/src/core/hdri_manager.cpp
new file mode 100644
index 0000000..1a5521e
--- /dev/null
+++ b/src/core/hdri_manager.cpp
@@ -0,0 +1,64 @@
+#include "hdri_manager.h"
+#include <filesystem>
+
+namespace Donut
+{
+    Ref<CubemapTexture> HDRIManager::load_hdri(const std::string& path)
+    {
+        auto it = m_hdri_cache.find(path);
+        if (it != m_hdri_cache.end())
+        {
+            DONUT_INFO("HDRI already cached: {}", path);
+            return it->second;
+        }
+
+        DONUT_INFO("Loading HDRI: {}", path);
+        auto hdri = CubemapTexture::create_from_hdri(path);
+        
+        if (hdri)
+        {
+            m_hdri_cache[path] = hdri;
+            DONUT_INFO("Successfully loaded and cached HDRI: {}", path);
+        }
+        else
+            DONUT_ERROR("Failed to load HDRI: {}", path);
+
+        return hdri;
+    }
+
+    void HDRIManager::set_current_hdri(const std::string& path)
+    {
+        auto hdri = load_hdri(path);
+        if (hdri)
+        {
+            m_current_hdri = hdri;
+            DONUT_INFO("Set current HDRI to: {}", path);
+        }
+        else
+            DONUT_ERROR("Failed to set current HDRI: {}", path);
+    }
+
+    std::string HDRIManager::get_hdri_name(const std::string& path) const
+    {
+        std::filesystem::path file_path(path);
+        std::string filename = file_path.stem().string();
+        std::string name = filename;
+        
+        for (size_t i = 0; i < name.length(); ++i)
+        {
+            if (name[i] == '_')
+                name[i] = ' ';
+            else if (i == 0 || name[i-1] == ' ')
+                name[i] = std::toupper(name[i]);
+        }
+        
+        return name;
+    }
+
+    void HDRIManager::clear_cache()
+    {
+        m_hdri_cache.clear();
+        m_current_hdri.reset();
+        DONUT_INFO("HDRI cache cleared");
+    }
+};
diff --git a/src/core/hdri_manager.h b/src/core/hdri_manager.h
new file mode 100644
index 0000000..5ccd402
--- /dev/null
+++ b/src/core/hdri_manager.h
@@ -0,0 +1,46 @@
+#pragma once
+
+#include "core/log.h"
+#include "rendering/texture.h"
+
+#include <string>
+#include <unordered_map>
+#include <memory>
+
+namespace Donut
+{
+    class HDRIManager
+    {
+    public:
+        static HDRIManager& get()
+        {
+            static HDRIManager instance;
+            return instance;
+        }
+
+        Ref<CubemapTexture> load_hdri(const std::string& path);
+        Ref<CubemapTexture> get_current_hdri() const { return m_current_hdri; }
+        
+        void set_current_hdri(const std::string& path);
+        const std::vector<std::string>& get_available_hdri() const { return m_available_hdri; }
+        std::string get_hdri_name(const std::string& path)   const;
+        void clear_cache();
+    private:
+         HDRIManager() = default;
+        ~HDRIManager() = default;
+
+        HDRIManager(const HDRIManager&)            = delete;
+        HDRIManager& operator=(const HDRIManager&) = delete;
+
+        std::unordered_map<std::string, Ref<CubemapTexture>> m_hdri_cache;
+        
+        Ref<CubemapTexture> m_current_hdri;
+        
+        std::vector<std::string> m_available_hdri = 
+        {
+            "assets/hdri/hdr_blue_nebulae_1.hdr",
+            "assets/hdri/hdr_subdued_blue_nebulae.hdr",
+            "assets/hdri/hdr_subdued_multi_nebulae.hdr"
+        };
+    };
+};