Support multi screen

[y4n9b0]

I'm working in Mac OS with multi screen: rmbp + Dell display.
scrcpy(v1.3) works well on the default display of rmbp, but there isn't preview on Dell display.

FYI:

1. It can receive and act the click event in window, just showing black screen only.
2. This doesn't happen if multi screen working in mirror mode, it happens while multi screen display side by side.

How could I do to make it works well in second display?
Thanks!

[rom1v]

Thank you for your report.

My first thought is that this is a bug in libSDL (like #15), because scrcpy itself does not handle multi-screen, only SDL does.

Which version of SDL do you use?

[roopepal]

Same here: only shows black when I move the window to the external display, and it again starts showing the preview correctly when I move the window back to the rMBP display.

sdl2-config --version says 2.0.9.

Edit: Looking further into this, it indeed is showing the preview even when on the external display, but the preview is incorrectly scaled and/or positioned. For example, making the window very tall brings the preview into the view: a tall image. But this is of course very inconvenient.

[rom1v]

What if you start scrcpy on the secondary display directly?

[roopepal]

It always starts on the primary display (how do I even start it on the secondary display?), but if I set the external monitor as my primary display it works fine on that and similarly fails when I move the window to the rMBP display. In other words, it works correctly on the display is starts on, and preview positioning fails when moved to the other display.

[y4n9b0]

@rom1v sdl2-config --version 2.0.8

[catinred2]

same problem here. BUT:

1. scrcpy window shows alright in my secondary display
2. the window does not respond mouse event while keyboard event works fine

[rom1v]

@catinred2 If you are on MacOS, see #15.

[catinred2]

@catinred2 If you are on MacOS, see #15.

yes that is the case

[rom1v]

(closing as duplicate of #15)

[carstenhag]

@1step2hell and others: If you can, please test #1408 so that this issue gets fixed.