diff options
Diffstat (limited to 'widget/windows/nsWindowGfx.cpp')
| -rw-r--r-- | widget/windows/nsWindowGfx.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/widget/windows/nsWindowGfx.cpp b/widget/windows/nsWindowGfx.cpp index a88631f89..9b303a0f2 100644 --- a/widget/windows/nsWindowGfx.cpp +++ b/widget/windows/nsWindowGfx.cpp @@ -320,6 +320,8 @@ bool nsWindow::OnPaint(HDC aDC, uint32_t aNestingLevel) #if defined(MOZ_XUL) // don't support transparency for non-GDI rendering, for now if (eTransparencyTransparent == mTransparencyMode) { + // This mutex needs to be held when EnsureTransparentSurface is called. + MutexAutoLock lock(mBasicLayersSurface->GetTransparentSurfaceLock()); targetSurface = mBasicLayersSurface->EnsureTransparentSurface(); } #endif |