Implemented uniform buffers. Optimized data upload to GPU

src/renderer.hpp

@@ -3,6 +3,7 @@
 
 #include "scene.hpp"
 #include "camera.hpp"
+#include "uniformbuffer.hpp"
 
 namespace Fan
 {
@@ -23,6 +24,58 @@ public:
                                       int screen_width, int screen_height,
                                       const Rc<Shader>& debug_shader,
                                       const Rc<Mesh>& default_mesh);
+
+private:
+    static Rc<UniformBuffer> s_camera_ubo;
+    static Rc<UniformBuffer> s_light_ubo;
+
+    static void update_global_data(const Scene& scene, const Camera& camera,
+                                   int screen_width, int screen_height);
+
+    struct CameraData {
+        glm::mat4 view;
+        glm::mat4 projection;
+    };
+
+    // Maps to Fan::DirectionalLight
+    struct DirectionalLightData {
+        glm::vec4 direction;
+        glm::vec4 ambient;
+        glm::vec4 diffuse;
+        glm::vec4 specular;
+    };
+
+    // Maps to Fan::PointLight
+    struct PointLightData {
+        glm::vec4 position;
+        glm::vec4 ambient;
+        glm::vec4 diffuse;
+        glm::vec4 specular;
+        glm::vec4 attenuation; // x = constant, y = linear, z = quadratic
+    };
+
+    // Maps to Fan::SpotLight
+    struct SpotLightData {
+        glm::vec4 position;
+        glm::vec4 direction;
+        glm::vec4 ambient;
+        glm::vec4 diffuse;
+        glm::vec4 specular;
+        glm::vec4 attenuation; // x = constant, y = linear, z = quadratic
+        glm::vec4 cut_offs;    // x = cut_off (cos), y = outer_cut_off (cos)
+    };
+
+    struct LightEnvironmentData {
+        DirectionalLightData dir_light;
+
+        int active_point_lights;
+        int active_spot_lights;
+        int _padding[2]; // Pad the 8 bytes of integers to a 16-byte boundary
+
+        PointLightData point_lights[MAX_POINT_LIGHTS];
+        SpotLightData spot_lights[MAX_SPOT_LIGHTS];
+    };
+
 };
 
 } // namespace Fan