Impl video_reinit so video_menu takes effect right away

src/video/sdl_window.c

@@ -87,6 +87,15 @@ bool create_window(SDL_Window **window, int width, int height, bool fullscreen)
     return true;
 }
 
+bool resize_window(SDL_Window *window, int width, int height, bool fullscreen) {
+    SDL_SetWindowSize(window, width, height);
+    if(SDL_SetWindowFullscreen(window, fullscreen ? SDL_WINDOW_FULLSCREEN : 0) < 0) {
+        PERROR("Could not set fullscreen mode: %s", SDL_GetError());
+        return false;
+    }
+    return true;
+}
+
 bool set_vsync(bool enable) {
     // If we don't want to enable vsync, just log and okay out.
     if(!enable) {

src/video/sdl_window.h

@@ -6,6 +6,7 @@
 
 bool create_gl_context(SDL_GLContext **context, SDL_Window *window);
 bool create_window(SDL_Window **window, int width, int height, bool fullscreen);
+bool resize_window(SDL_Window *window, int width, int height, bool fullscreen);
 bool set_vsync(bool enable);
 void ortho2d(float *matrix, float left, float right, float bottom, float top);
 

src/video/video.c

@@ -131,7 +131,17 @@ void video_reinit_renderer(void) {
 }
 
 int video_reinit(int window_w, int window_h, bool fullscreen, bool vsync) {
-    return 0;
+    g_video_state.screen_w = window_w;
+    g_video_state.screen_h = window_h;
+    g_video_state.fullscreen = fullscreen;
+    g_video_state.vsync = vsync;
+    bool success = resize_window(g_video_state.window, window_w, window_h, fullscreen);
+    success = set_vsync(g_video_state.vsync) && success;
+
+    // Fetch viewport size which may be different from window size.
+    SDL_GL_GetDrawableSize(g_video_state.window, &g_video_state.viewport_w, &g_video_state.viewport_h);
+
+    return success;
 }
 
 // Called on every game tick