Windowed Fullscreen

[felipecrs]

Hi,

I was wondering, wouldn't it be nice to have Windowed Fullscreen support?

This way I can move my cursor across monitors to other applications without having to minimize the game.

[bvschaik]

Constraining the mouse to the window (using SDL_WindowGrab) was a deliberate choice: #51

[felipecrs]

That's when the game is in Exclusive Fullscreen mode. The same applies to most other games. I'm not asking to change that.

What I'm asking for is a Windowed Fullscreen mode, where the window decorations are hidden, and the window size matches the resolution of the display.

Then, in Windowed or Windowed Fullscreen it would not make sense to constrain the cursor (as it is currently not constrained when running in Windowed mode).

[felipecrs]

BTW Windowed Fullscreen is also known as Borderless Windowed.

[bvschaik]

We're using SDL's SDL_WINDOW_FULLSCREEN_DESKTOP option:

julius/src/platform/screen.c

Line 287 in db676ad

if (0 != SDL_SetWindowFullscreen(SDL.window, SDL_WINDOW_FULLSCREEN_DESKTOP)) {

I'm not sure if that also counts as windowed fullscreen. SDL does not offer anything else besides true fullscreen at a specific resolution (causing desktop resizes), and this option. It does seem to have a borderless option that may do what you ask.

But technical details aside: how would the user tell the difference between true fullscreen and fullscreen without borders? And how would she switch between modes? Or move the window from one screen to another?

[felipecrs]

I just realized that Augustus has this "feature". All you need to do is to NOT have Fullscreen ticked and then set Windowed resolution to your display resolution:

So, maybe the cleanest and simplest way to solve this would be to add more resolution options (including display's) in the Video settings:

[felipecrs]

Or move the window from one screen to another?

Maybe using keyboard shortcuts like Windows + Arrow Left/Right, but I wouldn't worry about that. I have never seen a game that has implemented something to address this.

[bvschaik]

I tried some things out yesterday and today. Findings:

First, a borderless fully screen-covering window is ridiculously tricky to implement correctly for all platforms, especially considering things like notches.

Second, the current implementation already allows for using Alt+Tab to switch to any application on the second screen (tested on macOS and Windows 11). The only problem is that when you move the mouse over to another screen after Alt+Tab, the map keeps scrolling because we implemented a dirty workaround for a Windows 10 problem (#172). With knowledge gained from #439 I can now properly fix that.