1 files changed, 15 insertions, 0 deletions
diff --git a/video.cpp b/video.cpp
index 5a5e933..e777371 100644
--- a/video.cpp
+++ b/video.cpp
@@ -87,6 +87,10 @@ renderer::~renderer() {
 
 /* class window */
 
+// existing window mapping (SDL_ID <-> window)
+std::map<Uint8, window*> window::win_map;
+
+
 window::window(const std::string& title, std::size_t width, std::size_t height) {
     // create (hidden) window
     m_window = SDL_CreateWindow(
@@ -102,6 +106,9 @@ window::window(const std::string& title, std::size_t width, std::size_t height)
         throw std::runtime_error("failed to create SDL window");
     }
 
+    // put into window id mapping
+    win_map.insert(std::pair<Uint8, window*>(static_cast<Uint8>(SDL_GetWindowID(m_window)), this));
+
     m_renderer.create_sdl_renderer(m_window);
 
     // other attributes
@@ -134,7 +141,14 @@ bool window::is_visible() {
     return SDL_WINDOW_SHOWN & SDL_GetWindowFlags(m_window);
 }
 
+window * window::get(Uint8 id)
+{
+    auto it = win_map.find(id);
+    return (it != win_map.end()) ? it->second : 0;
+}
+
 void window::update() {
+
     m_renderer.clear();
     m_renderer.present();
 }
@@ -150,3 +164,4 @@ SDL_Window * window::sdl() {
 
     return m_window;
 }
+