I can now apply shaders to any GUI element, but I need a shader manager that will allow for hot reloading and tracking input/output variables.

guecs.hpp

@@ -81,6 +81,19 @@ namespace guecs {
     std::string name;
   };
 
+  struct Shader {
+    float duration = 0.1f;
+    std::string name{DEFAULT_UI_SHADER};
+    float u_time_end = 0.0;
+    bool active = false;
+    std::shared_ptr<sf::Shader> ptr = nullptr;
+    std::shared_ptr<sf::Clock> clock = nullptr;
+
+    void init(lel::Cell &cell);
+    void run();
+    void step();
+  };
+
   struct Background {
     float x = 0.0f;
     float y = 0.0f;
@@ -178,6 +191,22 @@ namespace guecs {
         remove<Comp>(ent);
       }
 
+      template<typename T>
+      void render_helper(sf::RenderWindow& window, DinkyECS::Entity ent, bool is_shape, T& target) {
+        sf::Shader *shader_ptr = nullptr;
+
+        if($world.has<Shader>(ent)) {
+          auto& shader = $world.get<Shader>(ent);
+
+          if(shader.active) {
+            shader_ptr = shader.ptr.get();
+            shader_ptr->setUniform("is_shape", is_shape);
+          }
+        }
+
+        window.draw(*target, shader_ptr);
+      }
+
       void show_sprite(string region, string sprite_name);
       void show_text(string region, wstring content);
       void update_text(string region, wstring content);
@@ -186,4 +215,5 @@ namespace guecs {
   };
 
   Clickable make_action(DinkyECS::World& target, Events::GUI event);
+
 }