Question

这就是故事：

我想从DiretX 10 C ++代码制作一个vb.NET代码，函数Public Declare Function D3DX10CreateDeviceAndSwapChain Lib "d3dx10_43.dll" _ (ByVal pAdapter As IDXGIAdapter, ByVal drivertype As D3D10_DRIVER_TYPE, ByVal software As IntPtr, ByVal flags As UInteger, ByRef pswapchaindesc As DXGI_SWAP_CHAIN_DESC, ByRef ppSwapChain As IntPtr, ByRef ppDevice As IntPtr) As Integer`可以和我一起使用：

Dim swapChainDesc As New DXGI_SWAP_CHAIN_DESC()
    swapChainDesc.BufferCount = 1
    swapChainDesc.BufferDesc.Width = Me.Width
    swapChainDesc.BufferDesc.Height = Me.Height
    swapChainDesc.BufferDesc.Format = DXGI_FORMAT.DXGI_FORMAT_R8G8B8A8_UNORM
    swapChainDesc.BufferUsage = 1L << (1 + 4) 
    swapChainDesc.OutputWindow = Me.Handle
    swapChainDesc.SampleDesc.Count = 1
    swapChainDesc.SampleDesc.Quality = 0
    swapChainDesc.Windowed = True


Dim sc As IntPtr
Dim d As IntPtr
D3DX10CreateDeviceAndSwapChain(Nothing,D3D10_DRIVER_TYPE.D3D10_DRIVER_TYPE_HARDWARE,IntPtr.Zero,0,swapChainDesc,sc,d)

其余代码是：

Dim s As IDXGISwapChain = CType(Marshal.GetTypedObjectForIUnknown(sc, GetType(IDXGISwapChain)), IDXGISwapChain)
Dim device As ID3D10Device = CType(Marshal.GetTypedObjectForIUnknown(d, GetType(ID3D10Device)), ID3D10Device)

Dim surface As ID3D10Texture2D
s.GetBuffer(0, Marshal.GenerateGuidForType(GetType(ID3D10Texture2D)), surface)

并将intptr转换为我使用的有效接口对象（它工作正常）：

Dim rtv As ID3D10RenderTargetView
Dim hresult As Integer = device.CreateRenderTargetView(surface, Nothing, rtv)
surface.Release() ' this works fine
MsgBox(rtv IsNot Nothing)

直到这里代码返回成功。

{{1}}

问题是：

当我更改位置（它们之间的成员排名到接口ID3D10Device）时，我得到AccessViolationException或该行的ArgumentException 昏昏沉沉的...... ...

为什么这种未定义的行为？

备注：界面ID3D10Device包含80多个成员，我也更改了一些成员位置，它们工作正常。

接口成员的未定义行为[s]

0 个答案: