protected unsafe DXGISwapchain(
GraphicsDevice device,
PresentationParameters presentationParameters,
ComObject deviceOrCommandQueue,
int bufferCount,
int frameCount) : base(device)
{
_frameCount = frameCount;
var width = Math.Max(presentationParameters.BackBufferWidth, 1);
var height = Math.Max(presentationParameters.BackBufferHeight, 1);
switch (presentationParameters.DeviceWindowHandle)
{
case IntPtr hwnd:
{
using (var dxgiDevice = deviceOrCommandQueue.QueryInterface <SharpDX.DXGI.Device>())
{
using (var dxgiFactory = dxgiDevice.Adapter.GetParent <Factory2>())
{
// Check tearing support.
RawBool allowTearing = false;
using (var factory5 = dxgiFactory.QueryInterfaceOrNull <DXGI.Factory5>())
{
factory5.CheckFeatureSupport(DXGI.Feature.PresentAllowTearing,
new IntPtr(&allowTearing), sizeof(RawBool)
);
// Recommended to always use tearing if supported when using a sync interval of 0.
_syncInterval = 0;
_presentFlags |= DXGI.PresentFlags.AllowTearing;
}
var swapchainDesc = new SharpDX.DXGI.SwapChainDescription1()
{
Width = width,
Height = height,
Format = Format.B8G8R8A8_UNorm,
Stereo = false,
SampleDescription = new DXGI.SampleDescription(1, 0),
Usage = DXGI.Usage.RenderTargetOutput,
BufferCount = bufferCount,
Scaling = Scaling.Stretch,
SwapEffect = allowTearing ? SwapEffect.FlipDiscard : DXGI.SwapEffect.Discard,
AlphaMode = AlphaMode.Ignore,
Flags = allowTearing ? SwapChainFlags.AllowTearing : DXGI.SwapChainFlags.None,
};
var fullscreenDescription = new DXGI.SwapChainFullScreenDescription
{
Windowed = true
};
_swapChain = new DXGI.SwapChain1(dxgiFactory,
deviceOrCommandQueue,
hwnd,
ref swapchainDesc,
fullscreenDescription);
dxgiFactory.MakeWindowAssociation(hwnd, DXGI.WindowAssociationFlags.IgnoreAll);
}
}
}
break;
//case CoreWindow coreWindowHandle:
// {
// var coreWindow = coreWindowHandle.CoreWindow;
// var swapchainDesc = new DXGI.SwapChainDescription1()
// {
// Width = width,
// Height = height,
// Format = DXGI.Format.B8G8R8A8_UNorm,
// Stereo = false,
// SampleDescription = new DXGI.SampleDescription(1, 0),
// Usage = DXGI.Usage.RenderTargetOutput,
// BufferCount = FrameCount,
// Scaling = DXGI.Scaling.AspectRatioStretch,
// SwapEffect = DXGI.SwapEffect.FlipDiscard,
// AlphaMode = DXGI.AlphaMode.Ignore,
// Flags = DXGI.SwapChainFlags.None,
// };
// using (var comCoreWindow = new ComObject(coreWindow))
// {
// _swapChain = new DXGI.SwapChain1(
// factory,
// device.D3DDevice,
// comCoreWindow,
// ref swapchainDesc);
// }
// }
// break;
}
}
/// <summary>
/// Create new instance of <see cref="GraphicsDevice"/>
/// </summary>
/// <param name="backend">The type of <see cref="GraphicsBackend"/></param>
/// <param name="validation">Whether to enable validation if supported.</param>
/// <param name="presentationParameters">The main swap chain parameters.</param>
/// <returns>New instance of <see cref="GraphicsDevice"/>.</returns>
public static GraphicsDevice Create(GraphicsBackend backend, bool validation, PresentationParameters presentationParameters)
{
Guard.NotNull(presentationParameters, nameof(presentationParameters));
if (backend == GraphicsBackend.Default)
{
backend = GetDefaultGraphicsPlatform(Platform.PlatformType);
}
if (!IsSupported(backend))
{
throw new GraphicsException($"Backend {backend} is not supported");
}
switch (backend)
{
case GraphicsBackend.Direct3D11:
#if !VORTICE_NO_D3D11
return(new D3D11.D3D11GraphicsDevice(validation, presentationParameters));
#else
throw new GraphicsException($"{GraphicsBackend.Direct3D11} Backend is not supported");
#endif
case GraphicsBackend.Direct3D12:
#if !VORTICE_NO_D3D12
return(new D3D12.D3D12GraphicsDevice(validation, presentationParameters));
#else
throw new GraphicsException($"{GraphicsBackend.Direct3D12} Backend is not supported");
#endif
case GraphicsBackend.Vulkan:
#if !VORTICE_NO_D3D12
return(new Vulkan.VulkanGraphicsDevice(validation, presentationParameters));
#else
throw new GraphicsException($"{GraphicsBackend.Vulkan} Backend is not supported");
#endif
default:
throw new GraphicsException($"Invalid {backend} backend");
}
}