public void Run()
{
var form = new RenderForm("2d and 3d combined...it's like magic");
form.KeyDown += (sender, args) => { if (args.KeyCode == Keys.Escape) form.Close(); };
// DirectX DXGI 1.1 factory
var factory1 = new Factory1();
// The 1st graphics adapter
var adapter1 = factory1.GetAdapter1(0);
// ---------------------------------------------------------------------------------------------
// Setup direct 3d version 11. It's context will be used to combine the two elements
// ---------------------------------------------------------------------------------------------
var description = new SwapChainDescription
{
BufferCount = 1,
ModeDescription = new ModeDescription(0, 0, new Rational(60, 1), Format.R8G8B8A8_UNorm),
IsWindowed = true,
OutputHandle = form.Handle,
SampleDescription = new SampleDescription(1, 0),
SwapEffect = SwapEffect.Discard,
Usage = Usage.RenderTargetOutput,
Flags = SwapChainFlags.AllowModeSwitch
};
Device11 device11;
SwapChain swapChain;
Device11.CreateWithSwapChain(adapter1, DeviceCreationFlags.None, description, out device11, out swapChain);
// create a view of our render target, which is the backbuffer of the swap chain we just created
RenderTargetView renderTargetView;
using (var resource = Resource.FromSwapChain<Texture2D>(swapChain, 0))
renderTargetView = new RenderTargetView(device11, resource);
// setting a viewport is required if you want to actually see anything
var context = device11.ImmediateContext;
var viewport = new Viewport(0.0f, 0.0f, form.ClientSize.Width, form.ClientSize.Height);
context.OutputMerger.SetTargets(renderTargetView);
context.Rasterizer.SetViewports(viewport);
//
// Create the DirectX11 texture2D. This texture will be shared with the DirectX10 device.
//
// The DirectX10 device will be used to render text onto this texture.
// DirectX11 will then draw this texture (blended) onto the screen.
// The KeyedMutex flag is required in order to share this resource between the two devices.
var textureD3D11 = new Texture2D(device11, new Texture2DDescription
{
Width = form.ClientSize.Width,
Height = form.ClientSize.Height,
MipLevels = 1,
ArraySize = 1,
Format = Format.B8G8R8A8_UNorm,
SampleDescription = new SampleDescription(1, 0),
Usage = ResourceUsage.Default,
BindFlags = BindFlags.RenderTarget | BindFlags.ShaderResource,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.SharedKeyedmutex
});
// ---------------------------------------------------------------------------------------------
// Setup a direct 3d version 10.1 adapter
// ---------------------------------------------------------------------------------------------
var device10 = new Device10(adapter1, SharpDX.Direct3D10.DeviceCreationFlags.BgraSupport, FeatureLevel.Level_10_0);
// ---------------------------------------------------------------------------------------------
// Setup Direct 2d
// ---------------------------------------------------------------------------------------------
// Direct2D Factory
var factory2D = new SharpDX.Direct2D1.Factory(FactoryType.SingleThreaded, DebugLevel.Information);
// Here we bind the texture we've created on our direct3d11 device through the direct3d10
// to the direct 2d render target....
var sharedResource = textureD3D11.QueryInterface<SharpDX.DXGI.Resource>();
var textureD3D10 = device10.OpenSharedResource<SharpDX.Direct3D10.Texture2D>(sharedResource.SharedHandle);
var surface = textureD3D10.AsSurface();
var rtp = new RenderTargetProperties
{
MinLevel = SharpDX.Direct2D1.FeatureLevel.Level_10,
Type = RenderTargetType.Hardware,
PixelFormat = new PixelFormat(Format.Unknown, AlphaMode.Premultiplied)
};
var renderTarget2D = new RenderTarget(factory2D, surface, rtp);
var solidColorBrush = new SolidColorBrush(renderTarget2D, Colors.Red);
// ---------------------------------------------------------------------------------------------------
// Setup the rendering data
// ---------------------------------------------------------------------------------------------------
// Load Effect. This includes both the vertex and pixel shaders.
// Also can include more than one technique.
ShaderBytecode shaderByteCode = ShaderBytecode.CompileFromFile(
"effectDx11.fx",
"fx_5_0",
ShaderFlags.EnableStrictness);
var effect = new Effect(device11, shaderByteCode);
// create triangle vertex data, making sure to rewind the stream afterward
var verticesTriangle = new DataStream(VertexPositionColor.SizeInBytes * 3, true, true);
verticesTriangle.Write(new VertexPositionColor(new Vector3(0.0f, 0.5f, 0.5f),new Color4(1.0f, 0.0f, 0.0f, 1.0f)));
verticesTriangle.Write(new VertexPositionColor(new Vector3(0.5f, -0.5f, 0.5f),new Color4(0.0f, 1.0f, 0.0f, 1.0f)));
verticesTriangle.Write(new VertexPositionColor(new Vector3(-0.5f, -0.5f, 0.5f),new Color4(0.0f, 0.0f, 1.0f, 1.0f)));
verticesTriangle.Position = 0;
// create the triangle vertex layout and buffer
var layoutColor = new InputLayout(device11, effect.GetTechniqueByName("Color").GetPassByIndex(0).Description.Signature, VertexPositionColor.inputElements);
var vertexBufferColor = new Buffer(device11, verticesTriangle, (int)verticesTriangle.Length, ResourceUsage.Default, BindFlags.VertexBuffer, CpuAccessFlags.None, ResourceOptionFlags.None, 0);
verticesTriangle.Close();
// create overlay vertex data, making sure to rewind the stream afterward
// Top Left of screen is -1, +1
// Bottom Right of screen is +1, -1
var verticesText = new DataStream(VertexPositionTexture.SizeInBytes * 4, true, true);
verticesText.Write(new VertexPositionTexture(new Vector3(-1, 1, 0),new Vector2(0, 0f)));
verticesText.Write(new VertexPositionTexture(new Vector3(1, 1, 0),new Vector2(1, 0)));
verticesText.Write(new VertexPositionTexture(new Vector3(-1, -1, 0),new Vector2(0, 1)));
verticesText.Write(new VertexPositionTexture(new Vector3(1, -1, 0),new Vector2(1, 1)));
verticesText.Position = 0;
// create the overlay vertex layout and buffer
var layoutOverlay = new InputLayout(device11, effect.GetTechniqueByName("Overlay").GetPassByIndex(0).Description.Signature, VertexPositionTexture.inputElements);
var vertexBufferOverlay = new Buffer(device11, verticesText, (int)verticesText.Length, ResourceUsage.Default, BindFlags.VertexBuffer, CpuAccessFlags.None, ResourceOptionFlags.None, 0);
verticesText.Close();
// Think of the shared textureD3D10 as an overlay.
// The overlay needs to show the 2d content but let the underlying triangle (or whatever)
// show thru, which is accomplished by blending.
var bsd = new BlendStateDescription();
bsd.RenderTarget[0].IsBlendEnabled = true;
bsd.RenderTarget[0].SourceBlend = BlendOption.SourceColor;
bsd.RenderTarget[0].DestinationBlend = BlendOption.BlendFactor;
bsd.RenderTarget[0].BlendOperation = BlendOperation.Add;
bsd.RenderTarget[0].SourceAlphaBlend = BlendOption.One;
bsd.RenderTarget[0].DestinationAlphaBlend = BlendOption.Zero;
bsd.RenderTarget[0].AlphaBlendOperation = BlendOperation.Add;
bsd.RenderTarget[0].RenderTargetWriteMask = ColorWriteMaskFlags.All;
var blendStateTransparent = new BlendState(device11, bsd);
// ---------------------------------------------------------------------------------------------------
// Create and tesselate an ellipse
// ---------------------------------------------------------------------------------------------------
var center = new DrawingPointF(form.ClientSize.Width/2.0f, form.ClientSize.Height/2.0f);
var ellipse = new EllipseGeometry(factory2D, new Ellipse(center, form.ClientSize.Width / 2.0f, form.ClientSize.Height / 2.0f));
// Populate a PathGeometry from Ellipse tessellation
var tesselatedGeometry = new PathGeometry(factory2D);
_geometrySink = tesselatedGeometry.Open();
// Force RoundLineJoin otherwise the tesselated looks buggy at line joins
_geometrySink.SetSegmentFlags(PathSegment.ForceRoundLineJoin);
// Tesselate the ellipse to our TessellationSink
ellipse.Tessellate(1, this);
_geometrySink.Close();
// ---------------------------------------------------------------------------------------------------
// Acquire the mutexes. These are needed to assure the device in use has exclusive access to the surface
// ---------------------------------------------------------------------------------------------------
var device10Mutex = textureD3D10.QueryInterface<KeyedMutex>();
var device11Mutex = textureD3D11.QueryInterface<KeyedMutex>();
// ---------------------------------------------------------------------------------------------------
// Main rendering loop
// ---------------------------------------------------------------------------------------------------
bool first = true;
RenderLoop
.Run(form,
() =>
{
if(first)
{
form.Activate();
first = false;
}
// clear the render target to black
context.ClearRenderTargetView(renderTargetView, Colors.DarkSlateGray);
// Draw the triangle
context.InputAssembler.InputLayout = layoutColor;
context.InputAssembler.PrimitiveTopology = PrimitiveTopology.TriangleList;
context.InputAssembler.SetVertexBuffers(0, new VertexBufferBinding(vertexBufferColor, VertexPositionColor.SizeInBytes, 0));
context.OutputMerger.BlendState = null;
var currentTechnique = effect.GetTechniqueByName("Color");
for (var pass = 0; pass < currentTechnique.Description.PassCount; ++pass)
{
using (var effectPass = currentTechnique.GetPassByIndex(pass))
{
System.Diagnostics.Debug.Assert(effectPass.IsValid, "Invalid EffectPass");
effectPass.Apply(context);
}
context.Draw(3, 0);
};
// Draw Ellipse on the shared Texture2D
device10Mutex.Acquire(0, 100);
renderTarget2D.BeginDraw();
renderTarget2D.Clear(Colors.Black);
renderTarget2D.DrawGeometry(tesselatedGeometry, solidColorBrush);
renderTarget2D.DrawEllipse(new Ellipse(center, 200, 200), solidColorBrush, 20, null);
renderTarget2D.EndDraw();
device10Mutex.Release(0);
// Draw the shared texture2D onto the screen, blending the 2d content in
device11Mutex.Acquire(0, 100);
var srv = new ShaderResourceView(device11, textureD3D11);
effect.GetVariableByName("g_Overlay").AsShaderResource().SetResource(srv);
context.InputAssembler.InputLayout = layoutOverlay;
context.InputAssembler.PrimitiveTopology = PrimitiveTopology.TriangleStrip;
context.InputAssembler.SetVertexBuffers(0, new VertexBufferBinding(vertexBufferOverlay, VertexPositionTexture.SizeInBytes, 0));
context.OutputMerger.BlendState = blendStateTransparent;
currentTechnique = effect.GetTechniqueByName("Overlay");
for (var pass = 0; pass < currentTechnique.Description.PassCount; ++pass)
{
using (var effectPass = currentTechnique.GetPassByIndex(pass))
{
System.Diagnostics.Debug.Assert(effectPass.IsValid, "Invalid EffectPass");
effectPass.Apply(context);
}
context.Draw(4, 0);
}
srv.Dispose();
device11Mutex.Release(0);
swapChain.Present(0, PresentFlags.None);
});
// dispose everything
vertexBufferColor.Dispose();
vertexBufferOverlay.Dispose();
layoutColor.Dispose();
layoutOverlay.Dispose();
effect.Dispose();
shaderByteCode.Dispose();
renderTarget2D.Dispose();
swapChain.Dispose();
device11.Dispose();
device10.Dispose();
textureD3D10.Dispose();
textureD3D11.Dispose();
factory1.Dispose();
adapter1.Dispose();
sharedResource.Dispose();
factory2D.Dispose();
surface.Dispose();
solidColorBrush.Dispose();
blendStateTransparent.Dispose();
device10Mutex.Dispose();
device11Mutex.Dispose();
}
