[Bug 59477] New: SolidWorks 2025: GDI-rendered child window (Feature Manager tree) invisible behind sibling OpenGL child window on macOS

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59477

            Bug ID: 59477
           Summary: SolidWorks 2025: GDI-rendered child window (Feature
                    Manager tree) invisible behind sibling OpenGL child
                    window on macOS
           Product: Wine
           Version: 11.0
          Hardware: arm
                OS: MacOS
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]

Created attachment 80466
  --> http://bugs.winehq.org/attachment.cgi?id=80466
Wine terminal output with WINEDEBUG=+win,+key showing F9 toggle for
featuremanager

SolidWorks 2025 Education Edition has a GDI-rendered Feature Manager tree panel
(SysTreeView32) as a sibling child window to an OpenGL-rendered 3D viewport. On
macOS with the winemac driver, the OpenGL content renders on top of the tree
panel, making it completely invisible.

The tree control is fully functional — items populate, right-click context
menus work, selections register — but nothing is visible on screen. The tree
becomes briefly visible when closing a document (OpenGL surface is destroyed)
and a black rectangle appears in its place when dragging the document window.

This appears to be the macOS equivalent of bug 2398 ("OpenGL is only used on
top level windows so child windows get overdrawn"), which was fixed for the X11
driver in Wine 0.9.57. The Mac driver uses separate Core Animation layers for
OpenGL surfaces, and these layers always render on top of GDI-rendered sibling
windows regardless of WS_CLIPSIBLINGS.

Steps to reproduce:
1. Install SolidWorks 2025 in a clean wineprefix on macOS (Apple Silicon via
Rosetta 2). As the solidworks installer does not work this must be done
manually either from the offline installer or from an existing installation.
2. Launch SolidWorks and open any part document
3. Observe that the left panel area (Feature Manager tree) is blank/invisible
4. Right-click the blank area — correct context menus appear, confirming the
tree exists

Expected: Tree panel visible alongside the 3D viewport, with viewport clipped
by WS_CLIPSIBLINGS
Actual: OpenGL viewport's CALayer covers the entire tree panel area

Wine debug output (+win) shows:
- Tree panel window uses parent surface (apply_window_pos reports surface 0x0
-> 0x0)
- Viewport window rect (-1,150)-(1709,1090) overlaps tree at (0,150)-(240,1090)
- Both windows receive paint messages and render correctly to their respective
surfaces

The OpenGLSurfaceMode registry setting partially confirms this:
- "transparent": tree becomes visible when viewport is undocked, but opaque GL
rendering still covers tree when docked
- "behind": viewport becomes invisible (GL behind all content)

System: macOS 26.3, Apple Silicon (M-series), Wine 11.0 stable, Rosetta 2
translation


Attachments to include:
- Wine terminal output with WINEDEBUG=+win,+key showing F9 toggle (attach as
.txt.gz)
- Screenshot showing blank tree area with working right-click menu

-- 
Do not reply to this email, post in Bugzilla using the
above URL to reply.
You are receiving this mail because:
You are watching all bug changes.