CEF Forum

The off-screen-rendering mode just like the attachment "off-screen-rendering.png" shown, and the default window rendering mode's like the "window.png" shown. The window rendering mode's resolution is higher than off-screen-rendering mode.

I need to support high-dpi on windows when use off-screen-rendering mode, and try to use CefEnableHighDPISupport、SetRoomLevel、"--force-device-scale-factor", "2"， but all of those did not work.

So is there a solution supported high-dpi on off-screen-rendering mode?

My OS version is windows 10.

thanks.

Did you test with `cefclient --off-screen-rendering-enabled`? You need to implement the CefRenderHandler::GetScreenInfo method and set CefScreenInfo.device_scale_factor.

It's works fine, thanks!

And there is another question. Are there any best practices for keyboard input on off-screen-rendering mode? if we hook keyboard event and call SendKeyEvent to send event to CEF directly, which seems difficult to handle modifiers、 language switch, and so on.

thanks.

Using SendKeyEvent is the only option. See usage in cefclient.