[Bug 57319] New: Painting in a proprietary application is broken with vulkan renderer

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57319

Bug ID: 57319
           Summary: Painting in a proprietary application is broken with
                    vulkan renderer
           Product: Wine
           Version: 9.19
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Keywords: regression
          Severity: normal
          Priority: P2
         Component: winex11.drv
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail]
   Regression SHA1: 21a0c158b94bfc65d4baa95095307a1db396db0c
      Distribution: ---

The following commit broke repainting in the proprietary application that I
have here:

commit 21a0c158b94bfc65d4baa95095307a1db396db0c
Author: Rémi Bernon 
Date:   Tue Sep 10 10:01:57 2024 +0200

winex11: Implement vulkan DPI scaling and child window rendering.

dlls/winex11.drv/vulkan.c | 91 +++++++++++++++++++++++++++++++++++++++++++----
 dlls/winex11.drv/window.c |  2 +-
 dlls/winex11.drv/x11drv.h |  1 +
 3 files changed, 86 insertions(+), 8 deletions(-)

The application uses D3D11 for rendering its windows contents. Broken painting
could be reproduced by creating 2 MDI like windows, switching to 1st MDI child,
and then moving main window by dragging it using window WM caption, this makes
contents of the 2nd MDI child visible instead of current 1st MDI child. When
using opengl renderer this particular bug doesn't exist, but there are other
problems that make vulkan renderer preferrable.

The application doesn't have a demo. I'll provide the requested logs if
desired.