Undecorated windows work best for transparent windows. On Win32 the decorations (top bar + shadow) remain opaque but OpenGL area is transparent. On macOS, entire window remains opaque if decorated.
Transparent windows still block the mouse (clicks, drags etc do not go through transparency).
Undecorated windows work best for transparent windows. On Win32 the decorations (top bar + shadow) remain opaque but OpenGL area is transparent. On macOS, entire window remains opaque if decorated.
Transparent windows still block the mouse (clicks, drags etc do not go through transparency).