8154847: Rendering is incorrect or not visible with StageStyle.UNIFIED on some graphics cards

Co-authored-by: Martin Fox <mfox@openjdk.org>
Reviewed-by: lkostyra, kcr

Author: 2 people

modules/javafx.graphics/src/main/native-prism-d3d/D3DResourceManager.cc

@@ -557,6 +557,7 @@ D3DResourceManager::CreateSwapChain(HWND hWnd, UINT numBuffers,
     newParams.Windowed = TRUE;
     newParams.BackBufferCount = numBuffers;
     newParams.SwapEffect = swapEffect;
+    newParams.BackBufferFormat = D3DFMT_A8R8G8B8;
     newParams.PresentationInterval = presentationInterval;
 
     IDirect3DSwapChain9 *pSwapChain = NULL;