Trying ttf loading

src/Engine/UI/RenderHierarchy.h

@@ -1,18 +1,40 @@
 #pragma once
 #include "Elements/Element.h"
 #include "Containers/List.h"
+#include "Graphics/GraphicsResources.h"
 
 namespace Seele
 {
 namespace UI
 {
-DECLARE_NAME_REF(Gfx, RenderCommand);
+struct RenderElementStyle
+{
+    Vector2 position;
+    Vector2 dimensions;
+    Vector backgroundColor;
+    uint32 backgroundImageIndex;
+    Vector4 borderBottomColor;
+    Vector4 borderLeftColor;
+    Vector4 borderRightColor;
+    Vector4 borderTopColor;
+    float borderBottomLeftRadius;
+    float borderBottomRightRadius;
+    float borderTopLeftRadius;
+    float borderTopRightRadius;
+    Vector4 fontColor;
+    float fontSize;
+    float opacity;
+};
+static_assert(sizeof(RenderElementStyle) == 34*4);
 class RenderElement
 {
 public:
     RenderElement() = default;
+    RenderElement(Element* parent, Element* referencedElement)
+        : parent(parent)
+        , referencedElement(referencedElement)
+    {}
     ~RenderElement() = default;
-    uint32 hierarchyIndex;
     Element* parent;
     Element* referencedElement;
 };
@@ -36,12 +58,13 @@ struct AddElementRenderHierarchyUpdate : public RenderHierarchyUpdate
 struct RemoveElementRenderHierarchyUpdate : public RenderHierarchyUpdate
 {
     Element* element;
-    RemoveElementRenderHierarchyUpdate(Element* elementToRemove)
+    bool removeChildren;
+    RemoveElementRenderHierarchyUpdate(Element* elementToRemove, bool removeChildren = false)
         : element(elementToRemove)
+        , removeChildren(removeChildren)
     {}
     virtual void apply(Array<RenderElement>& elements) override;
 };
-
 class RenderHierarchy
 {
 public:
@@ -58,6 +81,9 @@ private:
     static_assert(std::is_trivially_copyable_v<RenderElement>);
     // List of all drawable elements in draw order
     Array<RenderElement> drawElements;
+    // Shader data used for styling elements
+    Array<RenderElementStyle> elementStyles;
+    Array<Gfx::PTexture> usedTextures;
 
     List<RenderHierarchyUpdate*> updates;
     std::mutex updateLock;