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);
}
}
/// <summary>
/// Assigns a <see cref="D3D10.Texture2D"/> as the source of the back buffer.
/// </summary>
/// <param name="texture">
/// The <c>Texture2D</c> to assign as the back buffer. Value can be null.
/// </param>
/// <exception cref="InvalidOperationException">
/// The D3D10Image has not been locked by a call to the
/// <see cref="D3DImage.Lock" /> or <see cref="D3DImage.TryLock" /> methods.
/// </exception>
public void SetBackBuffer(D3D10.Texture2D texture)
{
// Free the old surface
if (this.surface != null)
{
this.surface.Dispose();
this.surface = null;
}
if (texture == null)
{
this.SetBackBuffer(D3DResourceType.IDirect3DSurface9, IntPtr.Zero);
}
else
{
using (var device = CreateDevice(Interop.NativeMethods.GetDesktopWindow()))
using (var texture9 = GetSharedSurface(device, texture))
{
this.surface = texture9.GetSurfaceLevel(0);
}
this.SetBackBuffer(D3DResourceType.IDirect3DSurface9, this.surface.NativeInterface);
}
}
private static D3D10.D3DDevice1 TryCreateDevice1(D3D10.DriverType type)
{
// We'll try to create the device that supports any of these feature levels
DirectX.Direct3D.FeatureLevel[] levels =
{
DirectX.Direct3D.FeatureLevel.Ten,
DirectX.Direct3D.FeatureLevel.NinePointThree,
DirectX.Direct3D.FeatureLevel.NinePointTwo,
DirectX.Direct3D.FeatureLevel.NinePointOne
};
foreach (var level in levels)
{
try
{
return D3D10.D3DDevice1.CreateDevice1(null, type, null, D3D10.CreateDeviceOptions.SupportBgra, level);
}
catch (ArgumentException) // E_INVALIDARG
{
continue; // Try the next feature level
}
catch (OutOfMemoryException) // E_OUTOFMEMORY
{
continue; // Try the next feature level
}
catch (DirectX.DirectXException) // D3DERR_INVALIDCALL or E_FAIL
{
continue; // Try the next feature level
}
}
return null; // We failed to create a device at any required feature level
}