1323049 - Window is painted incorrectly on Windows

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, defect)

Description

[Ryan Hunt [:rhunt]]

Attachment: Capture.PNG

With WR enabled the window is painted incorrectly. It looks like everything is offset by the title bar height, and then nothing gets painted there.

Input still works normal so if you hover over where the close button should be, it gets highlighted, but still offset incorrectly.

Comment 1

[Sotaro Ikeda [:sotaro]]

I confirmed the problem on my Win 10 laptop, but failed to reproduce on my Win10 desktop PC.

Comment 2

[Sotaro Ikeda [:sotaro]]

(In reply to Sotaro Ikeda [:sotaro] from comment #1)
> I confirmed the problem on my Win 10 laptop, but failed to reproduce on my
> Win10 desktop PC.

The following might be related to the problem.

The Win10 pc that does not have a problem uses nvidia's driver. The Win10 laptop that cause the problem uses intel's driver.

Comment 3

[Sotaro Ikeda [:sotaro]]

When the problem happened, webrender(OpenGL) did not render to white area. The white area is mostly non-client are of the app. The content area is extended to non-client area by handling WM_NCCALCSIZE message by https://dxr.mozilla.org/mozilla-central/source/widget/windows/nsWindow.cpp#5012.

When the problem happened, it seemed that the WM_NCCALCSIZE message handling did not extend the content area. Then it might be a platform for intel driver's problem.

I forcibly enabled OpenGL composition on the Win10 laptop, then I saw the same incorrect painting.

Comment 4

[Sotaro Ikeda [:sotaro]]

I did not see this bug's problem when OpenGLES via ANGLE is used on grahics branch.

Comment 5

[Sotaro Ikeda [:sotaro]]

(In reply to Sotaro Ikeda [:sotaro] from comment #4)
> I did not see this bug's problem when OpenGLES via ANGLE is used on grahics
> branch.

Though OpenGLES via ANGLE has another problem for now.

Comment 6

[Sotaro Ikeda [:sotaro]]

(In reply to Sotaro Ikeda [:sotaro] from comment #3)
>
> I forcibly enabled OpenGL composition on the Win10 laptop, then I saw the
> same incorrect painting.

Correction:
I forcibly enabled OpenGL composition on m-c & the Win10 laptop, then I saw the same incorrect painting.

Comment 7

[Sotaro Ikeda [:sotaro]]

(In reply to Sotaro Ikeda [:sotaro] from comment #3)
> 
> When the problem happened, it seemed that the WM_NCCALCSIZE message handling
> did not extend the content area. Then it might be a platform for intel
> driver's problem.

Correction:
Then it might be a problem of windows or intel  driver.

Comment 8

[Ryan Hunt [:rhunt]]

I have not noticed this since bug 1323316 landed. Is this still a problem or can this be closed?

Comment 9

[Sotaro Ikeda [:sotaro]]

Yes, this could be closed. thanks:)