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: wine-bugs@list.winehq.org Reporter: junkwalkers@gmail.com 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.