[Bug 56831] New: Label disappears except if renderer=gdi

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56831

Bug ID: 56831
           Summary: Label disappears except if renderer=gdi
           Product: Wine
           Version: 9.10
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 76639
  --> https://bugs.winehq.org/attachment.cgi?id=76639
Sample Delphi/FMX application

Hello,

Wine dev 9.10, Ubuntu 24.04
I wrote a sample application to illustrate the problem.
The application is written in Delphi/FMX, win64 and has just a form with a
label and a button that closes the form.

The problem is that the label disappears when the mouse hovers over the button.

But this doesn't happen if I specify
HKEY_CURRENT_USER\Software\Wine\Direct3D\renderer=gdi
I have the problem with renderer=gl or renderer=vulkan

I have tried to investigate: if I remove the call to InvalidateRect when
Repaint is called for the button, the problem disappears (but the aspect of the
button is wrong). The coordinates passed to InvalidateRect are the same under
Windows and under Ubuntu + Wine.

Thank you for your help.

Regards,

Michel Terrisse