GfxContext, render refactor

src/graphics/Viewport.cpp

@@ -0,0 +1,13 @@
+#include "Viewport.h"
+
+Viewport::Viewport(uint width, uint height) 
+    : width(width), height(height) {
+}
+
+uint Viewport::getWidth() const {
+    return width;
+}
+
+uint Viewport::getHeight() const {
+    return height;
+}