private static Interop.Direct3DTexture9 GetSharedSurface(Interop.Direct3DDevice9Ex device, D3D10.Texture2D texture)
{
// First get a shared handle to the D3D10 texture
using (var surface = texture.QueryInterface<DirectX.Graphics.Resource>())
{
IntPtr handle = surface.SharedHandle;
// Then create a D3D9 texture using the D3D10 shared handle.
// The D3D10 texture must be in the DXGI_FORMAT_B8G8R8A8_UNORM
// format (direct 9 version is D3DFMT_A8R8G8B8).
return device.CreateTexture(
texture.Description.Width,
texture.Description.Height,
1,
1, // D3DUSAGE_RENDERTARGET
21, // D3DFMT_A8R8G8B8
0, // D3DPOOL_DEFAULT
ref handle);
}
}