bool SwapChainPanelNativeWindow::initialize(EGLNativeWindowType window, IPropertySet *propertySet)
{
ComPtr<IPropertySet> props = propertySet;
ComPtr<IInspectable> win = window;
SIZE swapChainSize = {};
bool swapChainSizeSpecified = false;
HRESULT result = S_OK;
// IPropertySet is an optional parameter and can be null.
// If one is specified, cache as an IMap and read the properties
// used for initial host initialization.
if (propertySet)
{
result = props.As(&mPropertyMap);
if (SUCCEEDED(result))
{
// The EGLRenderSurfaceSizeProperty is optional and may be missing. The IPropertySet
// was prevalidated to contain the EGLNativeWindowType before being passed to
// this host.
result = GetOptionalSizePropertyValue(mPropertyMap, EGLRenderSurfaceSizeProperty, &swapChainSize, &swapChainSizeSpecified);
}
}
if (SUCCEEDED(result))
{
result = win.As(&mSwapChainPanel);
}
if (SUCCEEDED(result))
{
// If a swapchain size is specfied, then the automatic resize
// behaviors implemented by the host should be disabled. The swapchain
// will be still be scaled when being rendered to fit the bounds
// of the host.
// Scaling of the swapchain output needs to be handled by the
// host for swapchain panels even though the scaling mode setting
// DXGI_SCALING_STRETCH is configured on the swapchain.
if (swapChainSizeSpecified)
{
mClientRect = { 0, 0, swapChainSize.cx, swapChainSize.cy };
// Enable host swapchain scaling
mRequiresSwapChainScaling = true;
}
else
{
result = GetSwapChainPanelSize(mSwapChainPanel, &mClientRect);
}
}
if (SUCCEEDED(result))
{
mNewClientRect = mClientRect;
mClientRectChanged = false;
return registerForSizeChangeEvents();
}
return false;
}
bool SwapChainPanelNativeWindow::initialize(EGLNativeWindowType window, IPropertySet *propertySet)
{
ComPtr<IPropertySet> props = propertySet;
ComPtr<IInspectable> win = window;
SIZE swapChainSize = {};
HRESULT result = S_OK;
// IPropertySet is an optional parameter and can be null.
// If one is specified, cache as an IMap and read the properties
// used for initial host initialization.
if (propertySet)
{
result = props.As(&mPropertyMap);
if (FAILED(result))
{
return false;
}
// The EGLRenderSurfaceSizeProperty is optional and may be missing. The IPropertySet
// was prevalidated to contain the EGLNativeWindowType before being passed to
// this host.
result = GetOptionalSizePropertyValue(mPropertyMap, EGLRenderSurfaceSizeProperty, &swapChainSize, &mSwapChainSizeSpecified);
if (FAILED(result))
{
return false;
}
// The EGLRenderResolutionScaleProperty is optional and may be missing. The IPropertySet
// was prevalidated to contain the EGLNativeWindowType before being passed to
// this host.
result = GetOptionalSinglePropertyValue(mPropertyMap, EGLRenderResolutionScaleProperty, &mSwapChainScale, &mSwapChainScaleSpecified);
if (FAILED(result))
{
return false;
}
if (!mSwapChainScaleSpecified)
{
// Default value for the scale is 1.0f
mSwapChainScale = 1.0f;
}
// A EGLRenderSurfaceSizeProperty and a EGLRenderResolutionScaleProperty can't both be specified
if (mSwapChainScaleSpecified && mSwapChainSizeSpecified)
{
ERR() << "It is invalid to specify both an EGLRenderSurfaceSizeProperty and a "
"EGLRenderResolutionScaleProperty.";
return false;
}
}
if (SUCCEEDED(result))
{
result = win.As(&mSwapChainPanel);
}
ComPtr<IDependencyObject> swapChainPanelDependencyObject;
if (SUCCEEDED(result))
{
result = mSwapChainPanel.As(&swapChainPanelDependencyObject);
}
if (SUCCEEDED(result))
{
result = swapChainPanelDependencyObject->get_Dispatcher(
mSwapChainPanelDispatcher.GetAddressOf());
}
if (SUCCEEDED(result))
{
// If a swapchain size is specfied, then the automatic resize
// behaviors implemented by the host should be disabled. The swapchain
// will be still be scaled when being rendered to fit the bounds
// of the host.
// Scaling of the swapchain output needs to be handled by the
// host for swapchain panels even though the scaling mode setting
// DXGI_SCALING_STRETCH is configured on the swapchain.
if (mSwapChainSizeSpecified)
{
mClientRect = { 0, 0, swapChainSize.cx, swapChainSize.cy };
}
else
{
Size swapChainPanelSize;
result = GetSwapChainPanelSize(mSwapChainPanel, mSwapChainPanelDispatcher,
&swapChainPanelSize);
if (SUCCEEDED(result))
{
// Update the client rect to account for any swapchain scale factor
mClientRect = clientRect(swapChainPanelSize);
}
}
}
if (SUCCEEDED(result))
{
mNewClientRect = mClientRect;
mClientRectChanged = false;
return registerForSizeChangeEvents();
}
return false;
}
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;
}
