Added IRenderable, removed shader programs and allow more nuanced control of render passes, UI items are now rendered same as other scene item components.

src/dawn/scene/components/display/IRenderable.hpp

@@ -0,0 +1,20 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "display/shader/Shader.hpp"
+
+namespace Dawn {
+  class IRenderable {
+    public:
+      /**
+       * Returns the render passes for this renderable item, typically a scene
+       * item component, e.g. a Material or a UI Item.
+       * 
+       * @return Array of renderable passes.
+       */
+      virtual std::vector<struct ShaderPassItem> getRenderPasses() = 0;
+  };
+}

src/dawn/scene/components/display/Material.hpp

@@ -6,9 +6,10 @@
 #pragma once
 #include "scene/SceneItemComponent.hpp"
 #include "display/shader/ShaderManager.hpp"
+#include "scene/components/display/IRenderable.hpp"
 
 namespace Dawn {
-  class Material : public SceneItemComponent {
+  class Material : public SceneItemComponent, public IRenderable {
     public:
       /**
        * Material component constructor. 
@@ -16,12 +17,5 @@ namespace Dawn {
        * @param item Scene Item this component belongs to.
        */
       Material(SceneItem *item);
-    
-      /**
-       * Returns the shader that this material uses.
-       * 
-       * @return Shader that belongs to this material.
-       */
-      virtual Shader * getShader() = 0;
   };
 }