HRESULT SwapChainPanelNativeWindow::createSwapChain(ID3D11Device *device,
IDXGIFactory2 *factory,
DXGI_FORMAT format,
unsigned int width,
unsigned int height,
bool containsAlpha,
IDXGISwapChain1 **swapChain)
{
if (device == nullptr || factory == nullptr || swapChain == nullptr || width == 0 ||
height == 0)
{
return E_INVALIDARG;
}
DXGI_SWAP_CHAIN_DESC1 swapChainDesc = { 0 };
swapChainDesc.Width = width;
swapChainDesc.Height = height;
swapChainDesc.Format = format;
swapChainDesc.Stereo = FALSE;
swapChainDesc.SampleDesc.Count = 1;
swapChainDesc.SampleDesc.Quality = 0;
swapChainDesc.BufferUsage =
DXGI_USAGE_SHADER_INPUT | DXGI_USAGE_RENDER_TARGET_OUTPUT | DXGI_USAGE_BACK_BUFFER;
swapChainDesc.BufferCount = 2;
swapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
swapChainDesc.Scaling = DXGI_SCALING_STRETCH;
swapChainDesc.AlphaMode =
containsAlpha ? DXGI_ALPHA_MODE_PREMULTIPLIED : DXGI_ALPHA_MODE_IGNORE;
*swapChain = nullptr;
ComPtr<IDXGISwapChain1> newSwapChain;
ComPtr<ISwapChainPanelNative> swapChainPanelNative;
Size currentPanelSize = {};
HRESULT result = factory->CreateSwapChainForComposition(device, &swapChainDesc, nullptr, newSwapChain.ReleaseAndGetAddressOf());
if (SUCCEEDED(result))
{
result = mSwapChainPanel.As(&swapChainPanelNative);
}
if (SUCCEEDED(result))
{
result = RunOnUIThread(
[swapChainPanelNative, newSwapChain]
{
return swapChainPanelNative->SetSwapChain(newSwapChain.Get());
},
mSwapChainPanelDispatcher);
}
if (SUCCEEDED(result))
{
// The swapchain panel host requires an instance of the swapchain set on the SwapChainPanel
// to perform the runtime-scale behavior. This swapchain is cached here because there are
// no methods for retreiving the currently configured on from ISwapChainPanelNative.
mSwapChain = newSwapChain;
result = newSwapChain.CopyTo(swapChain);
}
// If the host is responsible for scaling the output of the swapchain, then
// scale it now before returning an instance to the caller. This is done by
// first reading the current size of the swapchain panel, then scaling
if (SUCCEEDED(result))
{
if (mSwapChainSizeSpecified || mSwapChainScaleSpecified)
{
result = GetSwapChainPanelSize(mSwapChainPanel, mSwapChainPanelDispatcher,
¤tPanelSize);
// Scale the swapchain to fit inside the contents of the panel.
if (SUCCEEDED(result))
{
result = scaleSwapChain(currentPanelSize, mClientRect);
}
}
}
return result;
}
HRESULT SwapChainPanelNativeWindow::createSwapChain(ID3D11Device *device, DXGIFactory *factory, DXGI_FORMAT format, unsigned int width, unsigned int height, DXGISwapChain **swapChain)
{
if (device == NULL || factory == NULL || swapChain == NULL || width == 0 || height == 0)
{
return E_INVALIDARG;
}
DXGI_SWAP_CHAIN_DESC1 swapChainDesc = { 0 };
swapChainDesc.Width = width;
swapChainDesc.Height = height;
swapChainDesc.Format = format;
swapChainDesc.Stereo = FALSE;
swapChainDesc.SampleDesc.Count = 1;
swapChainDesc.SampleDesc.Quality = 0;
swapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT | DXGI_USAGE_BACK_BUFFER;
swapChainDesc.BufferCount = 2;
swapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
swapChainDesc.Scaling = DXGI_SCALING_STRETCH;
swapChainDesc.AlphaMode = DXGI_ALPHA_MODE_IGNORE;
*swapChain = nullptr;
ComPtr<IDXGISwapChain1> newSwapChain;
ComPtr<ISwapChainPanelNative> swapChainPanelNative;
RECT currentPanelSize = {};
HRESULT result = factory->CreateSwapChainForComposition(device, &swapChainDesc, nullptr, newSwapChain.ReleaseAndGetAddressOf());
if (SUCCEEDED(result))
{
result = mSwapChainPanel.As(&swapChainPanelNative);
}
if (SUCCEEDED(result))
{
result = swapChainPanelNative->SetSwapChain(newSwapChain.Get());
}
if (SUCCEEDED(result))
{
// The swapchain panel host requires an instance of the swapchain set on the SwapChainPanel
// to perform the runtime-scale behavior. This swapchain is cached here because there are
// no methods for retreiving the currently configured on from ISwapChainPanelNative.
mSwapChain = newSwapChain;
result = newSwapChain.CopyTo(swapChain);
}
// If the host is responsible for scaling the output of the swapchain, then
// scale it now before returning an instance to the caller. This is done by
// first reading the current size of the swapchain panel, then scaling
if (SUCCEEDED(result) && mRequiresSwapChainScaling)
{
result = GetSwapChainPanelSize(mSwapChainPanel, ¤tPanelSize);
}
// Scale the swapchain to fit inside the contents of the panel.
if (SUCCEEDED(result) && mRequiresSwapChainScaling)
{
SIZE currentSize = { currentPanelSize.right, currentPanelSize.bottom };
result = scaleSwapChain(currentSize);
}
if (SUCCEEDED(result))
{
// If automatic swapchain resize behaviors have been disabled, then
// unregister for the resize change events.
if (mSupportsSwapChainResize == false)
{
unregisterForSizeChangeEvents();
}
}
return result;
}
