파일 분리, 셰이더 로드까지 수강.

src/glfw/glfw_window.cpp

@@ -22,6 +22,12 @@ glm::ivec2 Window::GetWindowSize() const {
   return window_size;
 }
 
+glm::ivec2 Window::GetFramebufferSize() const {
+  glm::ivec2 size;
+  glfwGetFramebufferSize(window_, &size.x, &size.y);
+  return size;
+}
+
 bool Window::ShouldClose() const { return glfwWindowShouldClose(window_); }
 
 GLFWwindow* Window::GetHandle() const { return window_; }