Bug 901025 - Allow GDI rendering mode when OMTC is enabled. r=jimm

widget/windows/winrt/FrameworkViewGfx.cpp

@@ -53,12 +53,15 @@ FrameworkView::Render(const nsIntRegion& aInvalidRegion)
     }
   }
 
+  // If OMTC is not in use, then we only support D2D rendering
+  if (!mWidget->ShouldUseOffMainThreadCompositing()) {
     if (IsRenderMode(gfxWindowsPlatform::RENDER_GDI) ||
         IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH32) ||
         IsRenderMode(gfxWindowsPlatform::RENDER_IMAGE_STRETCH24)) {
       NS_WARNING("Unsupported render mode, can't draw. Needs to be D2D.");
       return false;
     }
+  }
 
   if (mWidget->GetTransparencyMode() != eTransparencyOpaque) {
     NS_WARNING("transparency modes other than eTransparencyOpaque unsupported, can't draw.");