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I noticed that when user switches from fullscreen mode to windowed mode and exits application while in windowed mode, Windows performs an additional change of display settings, even though desktop resolution is the same as current one. This causes short black screen to show up. The only way I know of avoiding this is to explicitly switch to default display settings found in registry. MSDN documentation for ChangeDisplaySettingsEx states:


Here is the change I made that fixed the problem for me:


I tested it under Visual Studio 2012 and 64-bit MinGW and it worked fine in both cases. I haven't tested it with multiple monitors, so I'm not sure how it works there. Someone in charge of the Windows code might want to take a look at it as well.

+1 for this fix, It would be really nice to not have the last blink of resolution when closing an app.



2014-05-24 9:55 GMT-06:00 Melesie:



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Javier Flores

This patch is in, thanks!


On Mon, May 26, 2014 at 9:24 PM, Javier Flores wrote:

i dont know if it is because of this patch, or something else. I switch between fullscreen and window mode on my app, with:

if(fullscreen){ SDL_SetWindowFullscreen(glrender->main_window, SDL_TRUE); }
else{ SDL_SetWindowFullscreen(glrender->main_window, SDL_FALSE); }


and with 2.0.3 it works, i just compiled and linked from the lastest source and fullscreen works, but instead of returning to windowed mode it stays as fullscreen but with a black background filling the desktop, similar to FULLSCREEN_DESKTOP. But i wanted to return to window mode. any ideas?



2014-05-31 13:22 GMT-06:00 Sam Lantinga:



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Javier Flores

Anyway, i changed to FULLSCREEN_DESKTOP and used virtual resolution with sdl_gpu, not really sure if other people will have the same problem using the sdl rendering system though.



2014-05-31 23:48 GMT-06:00 Javier Flores:



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Javier Flores

I haven't had any issues with this so far, but I have to say I do all rendering myself instead of SDL. Have you tried reverting the change in WIN_SetDisplayMode to the previous one to see if it is indeed the culprit?

yeah i revert the changes and tested it, now it works as before.
Fullscreen -> Window -> Exit = Black blink resolution change at the end of the application.


with the patch is goes:
Fullscreen -> Fullscreen_Desktop (desktop fill with black, it does not return to window mode) -> Exit = No black blink resolution change at the end of the application.


using SDL_SetWindowFullscreen to toggle fullscreen and window mode.



2014-06-01 11:42 GMT-06:00 Melesie:



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Javier Flores

solved, while changing to window mode you need to resize and reposition the window.
going from fullscreen to window mode:
  SDL_SetWindowFullscreen(glrender->main_window, SDL_FALSE);
  SDL_SetWindowSize(glrender->main_window, SCREEN_WIDTH, SCREEN_HEIGHT);
  SDL_SetWindowPosition(glrender->main_window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED);


this is using the current patch, not reverting anything.



2014-06-01 17:36 GMT-06:00 Javier Flores:



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Javier Flores

That's true. I got bitten by this little detail myself. Oddly enough, this does not happen all the time. For example Window->Fullscreen(1280x720)->Window does not resize the window back to its original dimensions, while Window->Fullscreen(1920x1080)->Window does return it back. I suspect it's because 1920x1080 is the default display mode. I will have to look into it some more, since I'm not sure this is a bug or a hidden feature of SDL.