+ if ((!fullscreen && video.fullscreen_enabled) || new_surface == NULL)
+ {
+ video_xoffset = 0;
+ video_yoffset = 0;
+
+ /* switch display to window mode */
+#if 1
+ new_surface = SDLCreateScreen(backbuffer, FALSE);
+#else
+
+#if defined(TARGET_SDL2)
+
+#if USE_RENDERER
+ float screen_scaling_factor = 1.2;
+ int test_fullscreen = 0;
+ int surface_flags = (test_fullscreen ? surface_flags_fullscreen :
+ surface_flags_window);
+
+ if ((*backbuffer)->surface)
+ SDL_FreeSurface((*backbuffer)->surface);
+
+ if (sdl_texture)
+ SDL_DestroyTexture(sdl_texture);
+
+ if (sdl_renderer)
+ SDL_DestroyRenderer(sdl_renderer);
+
+ if (sdl_window)
+ SDL_DestroyWindow(sdl_window);
+
+ sdl_window = SDL_CreateWindow(program.window_title,
+ SDL_WINDOWPOS_CENTERED,
+ SDL_WINDOWPOS_CENTERED,
+ (int)(screen_scaling_factor * video.width),
+ (int)(screen_scaling_factor * video.height),
+ surface_flags);
+
+ if (sdl_window != NULL)
+ {
+ sdl_renderer = SDL_CreateRenderer(sdl_window, -1, 0);
+
+ if (sdl_renderer != NULL)
+ {
+ SDL_RenderSetLogicalSize(sdl_renderer, video.width, video.height);
+ SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
+
+ sdl_texture = SDL_CreateTexture(sdl_renderer,
+ SDL_PIXELFORMAT_ARGB8888,
+ SDL_TEXTUREACCESS_STREAMING,
+ video.width, video.height);
+
+ if (sdl_texture != NULL)
+ {
+#if 1
+ // (do not use alpha channel)
+ new_surface = SDL_CreateRGBSurface(0, video.width, video.height, 32,
+ 0x00FF0000,
+ 0x0000FF00,
+ 0x000000FF,
+ 0x00000000);
+#else
+ // (this uses an alpha channel, which we don't want here)
+ new_surface = SDL_CreateRGBSurface(0, video.width, video.height, 32,
+ 0x00FF0000,
+ 0x0000FF00,
+ 0x000000FF,
+ 0xFF000000);
+#endif
+
+ if (new_surface == NULL)
+ Error(ERR_WARN, "SDL_CreateRGBSurface() failed: %s",
+ SDL_GetError());
+ }
+ else
+ {
+ Error(ERR_WARN, "SDL_CreateTexture() failed: %s", SDL_GetError());
+ }
+ }
+ else
+ {
+ Error(ERR_WARN, "SDL_CreateRenderer() failed: %s", SDL_GetError());
+ }
+ }
+ else
+ {
+ Error(ERR_WARN, "SDL_CreateWindow() failed: %s", SDL_GetError());
+ }
+
+#else
+
+ if (sdl_window)
+ SDL_DestroyWindow(sdl_window);
+
+ sdl_window = SDL_CreateWindow(program.window_title,
+ SDL_WINDOWPOS_CENTERED,
+ SDL_WINDOWPOS_CENTERED,
+ video.width, video.height,
+ surface_flags_window);
+
+ if (sdl_window != NULL)
+ {
+ new_surface = SDL_GetWindowSurface(sdl_window);
+
+ // SDL_UpdateWindowSurface(sdl_window); // immediately map window
+ // UpdateScreen(NULL); // immediately map window
+ }
+#endif
+
+#else
+ new_surface = SDL_SetVideoMode(video.width, video.height,
+ video.depth, surface_flags_window);
+#endif
+#endif
+
+ if (new_surface == NULL)
+ {
+ /* switching display to window mode failed -- should not happen */
+ Error(ERR_WARN, "SDL_SetVideoMode() failed: %s", SDL_GetError());
+
+ success = FALSE;
+ }
+ else
+ {
+ (*backbuffer)->surface = new_surface;
+
+ video.fullscreen_enabled = FALSE;
+ video.window_scaling_percent = setup.window_scaling_percent;
+ video.window_scaling_quality = setup.window_scaling_quality;
+
+ success = TRUE;
+ }
+ }
+
+#if defined(TARGET_SDL2)
+ SDLRedrawWindow(); // map window
+ // UpdateScreen(NULL); // map window
+#endif
+
+#if 1
+ SDL_EventState(SDL_SYSWMEVENT, SDL_ENABLE);
+
+#if defined(PLATFORM_WIN32)
+ {
+ SDL_SysWMinfo wminfo;
+ HWND hwnd;
+ boolean wminfo_success = FALSE;
+
+ SDL_VERSION(&wminfo.version);
+#if defined(TARGET_SDL2)
+ if (sdl_window)
+ wminfo_success = SDL_GetWindowWMInfo(sdl_window, &wminfo);
+#else
+ wminfo_success = (SDL_GetWMInfo(&wminfo) == 1);
+#endif
+
+ if (wminfo_success)
+ {
+#if defined(TARGET_SDL2)
+ hwnd = wminfo.info.win.window;
+#else
+ hwnd = wminfo.window;
+#endif
+
+ DragAcceptFiles(hwnd, TRUE);
+ }
+ }
+#endif
+#endif
+
+ return success;
+}
+
+void SDLSetWindowTitle()
+{
+#if defined(TARGET_SDL2)
+ SDL_SetWindowTitle(sdl_window, program.window_title);
+#else
+ SDL_WM_SetCaption(program.window_title, program.window_title);
+#endif
+}
+
+#if defined(TARGET_SDL2)
+void SDLSetWindowScaling(int window_scaling_percent)
+{
+ if (sdl_window == NULL)
+ return;
+
+ float window_scaling_factor = (float)window_scaling_percent / 100;
+ int new_window_width = (int)(window_scaling_factor * video.width);
+ int new_window_height = (int)(window_scaling_factor * video.height);
+
+#if 0
+ Error(ERR_DEBUG, "::: SDLSetWindowScaling(%d) ...", window_scaling_percent);
+#endif
+
+ SDL_SetWindowSize(sdl_window, new_window_width, new_window_height);
+
+ video.window_scaling_percent = window_scaling_percent;
+ video.window_width = new_window_width;
+ video.window_height = new_window_height;
+
+ SetWindowTitle();
+}
+
+void SDLSetWindowScalingQuality(char *window_scaling_quality)
+{
+ if (sdl_texture == NULL)
+ return;
+
+ SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, window_scaling_quality);
+
+ SDL_Texture *new_texture = SDL_CreateTexture(sdl_renderer,
+ SDL_PIXELFORMAT_ARGB8888,
+ SDL_TEXTUREACCESS_STREAMING,
+ video.width, video.height);
+
+ if (new_texture != NULL)
+ {
+ SDL_DestroyTexture(sdl_texture);
+
+ sdl_texture = new_texture;
+
+ SDLRedrawWindow();
+ }
+
+ video.window_scaling_quality = window_scaling_quality;
+}
+
+void SDLSetWindowFullscreen(boolean fullscreen)
+{
+ if (sdl_window == NULL)
+ return;
+
+#if USE_DESKTOP_FULLSCREEN
+ int flags = (fullscreen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
+#else
+ int flags = (fullscreen ? SDL_WINDOW_FULLSCREEN : 0);
+#endif
+
+#if 0
+ Error(ERR_DEBUG, "::: SDL_SetWindowFullscreen(%d) ...", fullscreen);
+#endif