private D3D11GraphicsDevice(Window?window, SizeI size, Format depthStencilFormat = Format.D32_Float)
{
Window = window;
Size = size;
Factory = CreateDXGIFactory1 <IDXGIFactory2>();
using (IDXGIAdapter1 adapter = GetHardwareAdapter())
{
DeviceCreationFlags creationFlags = DeviceCreationFlags.BgraSupport;
#if DEBUG
if (SdkLayersAvailable())
{
creationFlags |= DeviceCreationFlags.Debug;
}
#endif
if (D3D11CreateDevice(
adapter,
DriverType.Unknown,
creationFlags,
s_featureLevels,
out ID3D11Device tempDevice, out FeatureLevel, out ID3D11DeviceContext tempContext).Failure)
{
// If the initialization fails, fall back to the WARP device.
// For more information on WARP, see:
// http://go.microsoft.com/fwlink/?LinkId=286690
D3D11CreateDevice(
IntPtr.Zero,
DriverType.Warp,
creationFlags,
s_featureLevels,
out tempDevice, out FeatureLevel, out tempContext).CheckError();
}
Device = tempDevice.QueryInterface <ID3D11Device1>();
DeviceContext = tempContext.QueryInterface <ID3D11DeviceContext1>();
tempContext.Dispose();
tempDevice.Dispose();
}
if (window != null)
{
IntPtr hwnd = window.Handle;
SwapChainDescription1 swapChainDescription = new()
{
Width = window.ClientSize.Width,
Height = window.ClientSize.Height,
Format = Format.R8G8B8A8_UNorm,
BufferCount = FrameCount,
BufferUsage = Usage.RenderTargetOutput,
SampleDescription = SampleDescription.Default,
Scaling = Scaling.Stretch,
SwapEffect = SwapEffect.FlipDiscard,
AlphaMode = AlphaMode.Ignore
};
SwapChainFullscreenDescription fullscreenDescription = new SwapChainFullscreenDescription
{
Windowed = true
};
SwapChain = Factory.CreateSwapChainForHwnd(Device, hwnd, swapChainDescription, fullscreenDescription);
Factory.MakeWindowAssociation(hwnd, WindowAssociationFlags.IgnoreAltEnter);
BackBufferTexture = SwapChain.GetBuffer <ID3D11Texture2D>(0);
RenderTargetView = Device.CreateRenderTargetView(BackBufferTexture);
}
else
{
// Create offscreen texture
OffscreenTexture = Device.CreateTexture2D(Format.R8G8B8A8_UNorm, Size.Width, Size.Height, 1, 1, null, BindFlags.ShaderResource | BindFlags.RenderTarget);
RenderTargetView = Device.CreateRenderTargetView(OffscreenTexture);
}
if (depthStencilFormat != Format.Unknown)
{
DepthStencilTexture = Device.CreateTexture2D(depthStencilFormat, Size.Width, Size.Height, 1, 1, null, BindFlags.DepthStencil);
DepthStencilView = Device.CreateDepthStencilView(DepthStencilTexture !, new DepthStencilViewDescription(DepthStencilTexture, DepthStencilViewDimension.Texture2D));
}
ReadOnlySpan <VertexPositionColor> triangleVertices = stackalloc VertexPositionColor[]
{
new VertexPositionColor(new Vector3(0f, 0.5f, 0.0f), new Color4(1.0f, 0.0f, 0.0f, 1.0f)),
new VertexPositionColor(new Vector3(0.5f, -0.5f, 0.0f), new Color4(0.0f, 1.0f, 0.0f, 1.0f)),
new VertexPositionColor(new Vector3(-0.5f, -0.5f, 0.0f), new Color4(0.0f, 0.0f, 1.0f, 1.0f))
};
bool dynamic = false;
if (dynamic)
{
_vertexBuffer = Device.CreateBuffer(VertexPositionColor.SizeInBytes * 3, BindFlags.VertexBuffer, ResourceUsage.Dynamic, CpuAccessFlags.Write);
MappedSubresource mappedSubresource = DeviceContext.Map(_vertexBuffer, 0, MapMode.WriteDiscard);
triangleVertices.CopyTo(mappedSubresource.AsSpan <VertexPositionColor>(3));
DeviceContext.Unmap(_vertexBuffer, 0);
}
else
{
_vertexBuffer = Device.CreateBuffer(triangleVertices, BindFlags.VertexBuffer);
}
InputElementDescription[] inputElementDescs = new[]
{
new InputElementDescription("POSITION", 0, Format.R32G32B32_Float, 0, 0),
new InputElementDescription("COLOR", 0, Format.R32G32B32A32_Float, 12, 0)
};
Span <byte> vertexShaderByteCode = CompileBytecode("Triangle.hlsl", "VSMain", "vs_4_0");
Span <byte> pixelShaderByteCode = CompileBytecode("Triangle.hlsl", "PSMain", "ps_4_0");
_vertexShader = Device.CreateVertexShader(vertexShaderByteCode);
_pixelShader = Device.CreatePixelShader(pixelShaderByteCode);
_inputLayout = Device.CreateInputLayout(inputElementDescs, vertexShaderByteCode);
}