[Problem/Bug]: The WebView display area is smaller than the WebView window size

[ztextplus]

What happened?

The WebView display area is smaller than the WebView window size

Chrome_WidgetWin_0：size: 1203 x 694 ,pos: 0, 0 (0, 67)
Chrome_WidgetWin_1：size:1203 x 694, pos: 0, 0 (0, 67)
Chrome_RenderWidgetHostHWND：size: 1203 x 694 ,pos: 0, 0 (0, 67)
Intermediate D3D Window：size: 1203 x 694, pos: -514, -290 (-514, -223)
Web page display area：size: 557x 328

The offset of the Intermediate D3D Window should be wrong？

WebView2 version：118.0.2088.46

Importance

Blocking. My app's basic functions are not working due to this issue.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

118.0.2088.46

SDK Version

No response

Framework

Win32

Operating System

Windows 10

OS Version

No response

Repro steps

1. load webview.
2. move the parent window.

Regression

Don't know

Last working version (if regression)

No response

[victorhuangwq]

Thanks for reporting this issue. @bradp0721 could you take a look at this?

[johna-ms]

@ztextplus, I believe this is a dupe of #3839. Could you verify if your system has custom OS text scaling on? If so, I will close this and we can continue the conversation on the other issue.

[ztextplus]

@johna-ms I am very sure that this problem has nothing to do with DPI. I reproduced this problem on my own computer. When the problem occurred, the scaling factor of my monitor was 100%.

Then I also discovered a strange phenomenon. As I moved the main window, the display area of the web page became smaller and smaller. I believe if I keep moving the main window, the display area of the web page will disappear completely.

[ztextplus]

@johna-ms I think the negative offset of the window Intermediate D3D Window should be the key to the problem.

[johna-ms]

You're right, I have never seen the Intermediate D3D window be offset like that. Could you give more detailed repro steps or a repro app? I can't repro this with a barebones Win32 application I'm wondering what else is going on.