Optimize parameter passing to avoid unnecessary copying

src/graphics/core/DrawContext.cpp

@@ -2,6 +2,8 @@
 
 #include <GL/glew.h>
 
+#include <utility>
+
 #include "Batch2D.hpp"
 #include "Framebuffer.hpp"
 #include "../../window/Window.hpp"
@@ -23,10 +25,10 @@ static void set_blend_mode(BlendMode mode) {
 
 DrawContext::DrawContext(
     const DrawContext* parent, 
-    const Viewport& viewport, 
+    Viewport  viewport,
     Batch2D* g2d
 ) : parent(parent), 
-    viewport(viewport), 
+    viewport(std::move(viewport)),
     g2d(g2d) 
 {}