example/spriteshd: vsync doesn't work on Windows

[chengxuge]

In full-screen mode, mac and windows fps performance is inconsistent, mac stable at 60 frames, windows can reach 1600 frames.

[chengxuge]

Isn't vsync not set to be consistent? I haven't changed.
demo:examples/spriteshd

[hajimehoshi]

This can be an environment where vsync doesn't work with the fullscreen mode. What about the other applications?

[chengxuge]

Just vsync initialization, under windows full screen, not true.

[hajimehoshi]

I don't understand. Did you run the other fullscreen application? Did vsync work in this case?

[chengxuge]

demo: examples/spriteshd.
Run under windows and mac, respectively, this is a full-screen program, but vsync in 2 operating systems, inconsistent, window program for the time being no problem.

[chengxuge]

Windows full screen, vsync is not the default true.

[hajimehoshi]

I meant I'd like you to try other applications than ebiten.

[chengxuge]

But ebiten vsync defaults to true, why is it inconsistent under windows fullScreen?

[hajimehoshi]

What I want to know is whether vsync works in fullscreen mode in your environment with any applications or not. I'd like to know this is an Ebiten-specific issue or not.

[hajimehoshi]

At least in my Windows environments (Vaio Z Canvas and Parallels VM), vsync works as expected.

[hajimehoshi]

At least in my Windows environments (Vaio Z Canvas and Parallels VM), vsync works as expected.

Now I've confirmed examples/spritehd's FPS is higher than expected. Let me investigate.

But ebiten vsync defaults to true, why is it inconsistent under windows fullScreen?

Again, this might be an Ebiten-specific issue or not. I want to know which.

[chengxuge]

Yes, it works, but in windows fullScreen mode, vsync behavior is not the default true.

[chengxuge]

For the time being, I'll just ebiten.

[hajimehoshi]

I've confirmed this issue with examples/spriteshd anyway. I'll investigate this. Thank you.

[hajimehoshi]

Related to #375

[hajimehoshi]

glfw/glfw#1072

Apparently this is an issue in GLFW. No workaround here unfortunately.

EDIT: The workaround might be to make the window fullscreen with a little delay. Let me try.

[hajimehoshi]

The interesting thing is that examples/windowsize with -fullscreen flag doesn't cause this issue. Then, there should be a hack or a workaround.

[chengxuge]

Call ebiten.SetVsyncEnabled in update, can return to normal, I updated the latest driver, examples/spriteshd vsync, not the default behavior.

[hajimehoshi]

I think this is fixed. Thank you!