Implement VCanvas and Update TextElem

- Text now requires a font and is able to take an individual scale
- Container requires &ref for Elements to make sure they always exist
- SetViewport now sets the canvas as well
- SetBaseViewport Sets the Virtual Canvas Size
- Layout Now requires a Drawlist reference in Render function
- main.cpp: updated the template

include/pd/ultra/container.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <pd/lithium/lithium.hpp>
+#include <pd/ultra/canvas.hpp>
 #include <pd/ultra/elems/element.hpp>
 
 namespace PD {
@@ -11,14 +12,18 @@ class Container {
   Container(const PD::Li::Rect& r) : pRect(r) {}
   virtual ~Container() {}
 
-  void Push(PD::Ultra::ElementBase* elem) {
-    elem->SetParent(this);
-    pElems.Push(elem);
+  void Push(PD::Ultra::ElementBase& elem) {
+    elem.SetParent(this);
+    pElems.Push(&elem);
   }
   void Reset() { pElems.ResetFast(); }
   const PD::Li::Rect& GetRenderspace() const { return pRect; }
 
-  void SetViewport(const PD::fvec2& vp) { pRect = PD::fvec4(PD::fvec2(0), vp); }
+  void SetViewport(const PD::fvec2& vp) {
+    pCanvas.SetViewport(vp);
+    pRect = PD::fvec4(PD::fvec2(0), vp);
+  }
+  void SetBaseViewport(const PD::ivec2& vp) { pCanvas.SetVirtualViewport(vp); }
 
   const PD::fvec2 GetTopLeft() const { return pRect.TopLeft(); }
   const PD::fvec2 GetTopRight() const { return pRect.TopRight(); }
@@ -26,12 +31,14 @@ class Container {
   const PD::fvec2 GetBotRight() const { return pRect.BotRight(); }
   const PD::fvec2 GetSize() const { return pRect.BotRight() - pRect.TopLeft(); }
   const PD::fvec2 GetPosition() const { return pRect.TopLeft(); }
+  const Canvas& GetCanvas() const { return pCanvas; }
 
  protected:
   PD::Pool<PD::Ultra::ElementBase*>& GetElements() { return pElems; }
 
  private:
   PD::Li::Rect pRect;
+  Canvas pCanvas;
   PD::Pool<PD::Ultra::ElementBase*> pElems;
 };
 }  // namespace Ultra