当我使用Alt + Enter或调用IDXGISwapChain::SetFullscreenState时，我注意到DirectX会在内部抛出一堆异常。当且仅当我配置DXGI_SWAP_CHAIN_DESC
Exception thrown at 0x7412D8A8 in 05 - D3D11 Core App.exe: Microsoft C++ exception: _com_error at memory location 0x0018CC58.
Exception thrown at 0x7412D8A8 in 05 - D3D11 Core App.exe: Microsoft C++ exception: _com_error at memory location 0x0018D854.
Exception thrown at 0x7412D8A8 in 05 - D3D11 Core App.exe: Microsoft C++ exception: _com_error at memory location 0x0018D980.
Exception thrown at 0x7412D8A8 in 05 - D3D11 Core App.exe: Microsoft C++ exception: _com_error at memory location 0x0018EBD8.
Exception thrown at 0x7412D8A8 in 05 - D3D11 Core App.exe: Microsoft C++ exception: _com_error at memory location 0x0018ED8C.
Exception thrown at 0x7412D8A8 in 05 - D3D11 Core App.exe: Microsoft C++ exception: _com_error at memory location 0x0018CC58.
Exception thrown at 0x7412D8A8 in 05 - D3D11 Core App.exe: Microsoft C++ exception: _com_error at memory location 0x0018D854.
Exception thrown at 0x7412D8A8 in 05 - D3D11 Core App.exe: Microsoft C++ exception: _com_error at memory location 0x0018D980.
Exception thrown at 0x7412D8A8 in 05 - D3D11 Core App.exe: Microsoft C++ exception: _com_error at memory location 0x0018EBD8.
Exception thrown at 0x7412D8A8 in 05 - D3D11 Core App.exe: Microsoft C++ exception: _com_error at memory location 0x0018ED8C.
这些从未传播到我的代码，所以我假设这些消息是针对正在处理的第一次机会异常。
我的问题是：这些消息是正常的，还是表明我以非理想的方式做某事？
就上下文而言，我正在阅读Frank Luna的DirectX 11书籍。这发生在他自己的第6章Box演示的示例代码中。他的网站上的相关代码：
bool D3DApp::InitDirect3D()
{
// Create the device and device context.
UINT createDeviceFlags = 0;
#if defined(DEBUG) || defined(_DEBUG)
createDeviceFlags |= D3D11_CREATE_DEVICE_DEBUG;
#endif
D3D_FEATURE_LEVEL featureLevel;
HRESULT hr = D3D11CreateDevice(
0, // default adapter
md3dDriverType,
0, // no software device
createDeviceFlags,
0, 0, // default feature level array
D3D11_SDK_VERSION,
&md3dDevice,
&featureLevel,
&md3dImmediateContext);
if( FAILED(hr) )
{
MessageBox(0, L"D3D11CreateDevice Failed.", 0, 0);
return false;
}
if( featureLevel != D3D_FEATURE_LEVEL_11_0 )
{
MessageBox(0, L"Direct3D Feature Level 11 unsupported.", 0, 0);
return false;
}
// Check 4X MSAA quality support for our back buffer format.
// All Direct3D 11 capable devices support 4X MSAA for all render
// target formats, so we only need to check quality support.
HR(md3dDevice->CheckMultisampleQualityLevels(
DXGI_FORMAT_R8G8B8A8_UNORM, 4, &m4xMsaaQuality));
assert( m4xMsaaQuality > 0 );
// Fill out a DXGI_SWAP_CHAIN_DESC to describe our swap chain.
DXGI_SWAP_CHAIN_DESC sd;
sd.BufferDesc.Width = mClientWidth;
sd.BufferDesc.Height = mClientHeight;
sd.BufferDesc.RefreshRate.Numerator = 60;
sd.BufferDesc.RefreshRate.Denominator = 1;
sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
sd.BufferDesc.ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
sd.BufferDesc.Scaling = DXGI_MODE_SCALING_UNSPECIFIED;
// Use 4X MSAA?
if( mEnable4xMsaa )
{
sd.SampleDesc.Count = 4;
sd.SampleDesc.Quality = m4xMsaaQuality-1;
}
// No MSAA
else
{
sd.SampleDesc.Count = 1;
sd.SampleDesc.Quality = 0;
}
sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
sd.BufferCount = 1;
sd.OutputWindow = mhMainWnd;
sd.Windowed = true;
sd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
sd.Flags = 0;
// To correctly create the swap chain, we must use the IDXGIFactory that was
// used to create the device. If we tried to use a different IDXGIFactory instance
// (by calling CreateDXGIFactory), we get an error: "IDXGIFactory::CreateSwapChain:
// This function is being called with a device from a different IDXGIFactory."
IDXGIDevice* dxgiDevice = 0;
HR(md3dDevice->QueryInterface(__uuidof(IDXGIDevice), (void**)&dxgiDevice));
IDXGIAdapter* dxgiAdapter = 0;
HR(dxgiDevice->GetParent(__uuidof(IDXGIAdapter), (void**)&dxgiAdapter));
IDXGIFactory* dxgiFactory = 0;
HR(dxgiAdapter->GetParent(__uuidof(IDXGIFactory), (void**)&dxgiFactory));
HR(dxgiFactory->CreateSwapChain(md3dDevice, &sd, &mSwapChain));
ReleaseCOM(dxgiDevice);
ReleaseCOM(dxgiAdapter);
ReleaseCOM(dxgiFactory);
// The remaining steps that need to be carried out for d3d creation
// also need to be executed every time the window is resized. So
// just call the OnResize method here to avoid code duplication.
OnResize();
return true;
}
void D3DApp::OnResize()
{
assert(md3dImmediateContext);
assert(md3dDevice);
assert(mSwapChain);
// Release the old views, as they hold references to the buffers we
// will be destroying. Also release the old depth/stencil buffer.
ReleaseCOM(mRenderTargetView);
ReleaseCOM(mDepthStencilView);
ReleaseCOM(mDepthStencilBuffer);
// Resize the swap chain and recreate the render target view.
HR(mSwapChain->ResizeBuffers(1, mClientWidth, mClientHeight, DXGI_FORMAT_R8G8B8A8_UNORM, 0));
ID3D11Texture2D* backBuffer;
HR(mSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), reinterpret_cast<void**>(&backBuffer)));
HR(md3dDevice->CreateRenderTargetView(backBuffer, 0, &mRenderTargetView));
ReleaseCOM(backBuffer);
// Create the depth/stencil buffer and view.
D3D11_TEXTURE2D_DESC depthStencilDesc;
depthStencilDesc.Width = mClientWidth;
depthStencilDesc.Height = mClientHeight;
depthStencilDesc.MipLevels = 1;
depthStencilDesc.ArraySize = 1;
depthStencilDesc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
// Use 4X MSAA? --must match swap chain MSAA values.
if( mEnable4xMsaa )
{
depthStencilDesc.SampleDesc.Count = 4;
depthStencilDesc.SampleDesc.Quality = m4xMsaaQuality-1;
}
// No MSAA
else
{
depthStencilDesc.SampleDesc.Count = 1;
depthStencilDesc.SampleDesc.Quality = 0;
}
depthStencilDesc.Usage = D3D11_USAGE_DEFAULT;
depthStencilDesc.BindFlags = D3D11_BIND_DEPTH_STENCIL;
depthStencilDesc.CPUAccessFlags = 0;
depthStencilDesc.MiscFlags = 0;
HR(md3dDevice->CreateTexture2D(&depthStencilDesc, 0, &mDepthStencilBuffer));
HR(md3dDevice->CreateDepthStencilView(mDepthStencilBuffer, 0, &mDepthStencilView));
// Bind the render target view and depth/stencil view to the pipeline.
md3dImmediateContext->OMSetRenderTargets(1, &mRenderTargetView, mDepthStencilView);
// Set the viewport transform.
mScreenViewport.TopLeftX = 0;
mScreenViewport.TopLeftY = 0;
mScreenViewport.Width = static_cast<float>(mClientWidth);
mScreenViewport.Height = static_cast<float>(mClientHeight);
mScreenViewport.MinDepth = 0.0f;
mScreenViewport.MaxDepth = 1.0f;
md3dImmediateContext->RSSetViewports(1, &mScreenViewport);
}
答案 0 :(得分：1)
这里的C ++异常是运行时内部的，不会传播出函数。除非HRESULT出现错误，否则请忽略它们。