Unable to use OS.set_current_screen while in true fullscreen

[TheSHEEEP]

Operating system or device, Godot version, GPU Model and driver (if graphics related):
Windows 64bit & NVIDIA GeForce GTX 970
Linux 64bit & NVIDIA GeForce GTX 1060
Godot 2.1.4

Issue description:
When the application is in true fullscreen mode (via OS.set_window_fullscreen), using OS.set_current_screen does not do anything.
You'd expect it would switch to the passed monitor.

As a workaround, you have to switch the window to another mode (like windowed or borderless fullscreen), before calling OS.set_current_screen. Then, you can apply true fullscreen again.
It isn't too much work, but still shouldn't be required.

Steps to reproduce:
Try above description in the window management demo.

[sturnclaw]

Can you confirm this still occurs on Godot 3.0.3 / master?

[johnzantey]

FYI: Used your suggested workaround for Linux on GD 3.2.1 - TY

[akien-mga]

At least on Linux OS.set_current_screen seems to have dedicated code to handle the fullscreen mode:

godot/platform/x11/os_x11.cpp

Lines 1184 to 1194 in 2d57df6

	if (current_videomode.fullscreen) {
	Point2i position = get_screen_position(p_screen);
	Size2i size = get_screen_size(p_screen);
	XMoveResizeWindow(x11_display, x11_window, position.x, position.y, size.x, size.y);
	} else {
	if (p_screen != get_current_screen()) {
	Point2i position = get_screen_position(p_screen);
	XMoveWindow(x11_display, x11_window, position.x, position.y);
	}
	}

But it could be that it doesn't work. (CC @bruvzg @pouleyKetchoupp)

[acgc99]

Same issue in Godot Engine v3.4.stable.official.206ba70f4

If fullscreen is enabled from Project>Settings:

print(OS.get_screen_count() )
if OS.get_screen_count() > 1:
	print(OS.get_current_screen())
	OS.set_current_screen(1)
	print(OS.get_current_screen())

Prints

2
0
0

And the game screen is 0.

But if I disable fullscreen and do:

print(OS.get_screen_count() )
if OS.get_screen_count() > 1:
	print(OS.get_current_screen())
	OS.set_current_screen(1)
	print(OS.get_current_screen())
	OS.window_fullscreen = !OS.window_fullscreen

I get:

2
0
1

And it works as expected.

[akien-mga]

Fixed by #63192.