public TextRenderer(Device device)
{
using (var factory = new SlimDX.DXGI.Factory1())
{
using (var adapter = factory.GetAdapter1(0))
{
this.device = new SlimDX.Direct3D10_1.Device1(
adapter,
SlimDX.Direct3D10.DriverType.Hardware,
SlimDX.Direct3D10.DeviceCreationFlags.BgraSupport,
SlimDX.Direct3D10_1.FeatureLevel.Level_10_0
);
// 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.
textureD3D11 = new SlimDX.Direct3D11.Texture2D(device.Handle, new SlimDX.Direct3D11.Texture2DDescription
{
Width = device.Form.Width,
Height = device.Form.Height,
MipLevels = 1,
ArraySize = 1,
Format = SlimDX.DXGI.Format.B8G8R8A8_UNorm,
SampleDescription = new SlimDX.DXGI.SampleDescription(1, 0),
Usage = SlimDX.Direct3D11.ResourceUsage.Default,
BindFlags = SlimDX.Direct3D11.BindFlags.RenderTarget | SlimDX.Direct3D11.BindFlags.ShaderResource,
CpuAccessFlags = SlimDX.Direct3D11.CpuAccessFlags.None,
OptionFlags = SlimDX.Direct3D11.ResourceOptionFlags.KeyedMutex
});
// A DirectX10 Texture2D sharing the DirectX11 Texture2D
var sharedResource = new SlimDX.DXGI.Resource(textureD3D11);
var textureD3D10 = this.device.OpenSharedResource<SlimDX.Direct3D10.Texture2D>(sharedResource.SharedHandle);
// The KeyedMutex is used just prior to writing to textureD3D11 or textureD3D10.
// This is how DirectX knows which DirectX (10 or 11) is supposed to be writing
// to the shared texture. The keyedMutex is just defined here, they will be used
// a bit later.
mutex10 = new SlimDX.DXGI.KeyedMutex(textureD3D10);
mutex11 = new SlimDX.DXGI.KeyedMutex(textureD3D11);
// Direct2D Factory
SlimDX.Direct2D.Factory d2Factory = new SlimDX.Direct2D.Factory(
SlimDX.Direct2D.FactoryType.SingleThreaded,
SlimDX.Direct2D.DebugLevel.Information
);
// Direct Write factory
SlimDX.DirectWrite.Factory dwFactory = new SlimDX.DirectWrite.Factory(
SlimDX.DirectWrite.FactoryType.Isolated
);
// The textFormat we will use to draw text with
textFormat = new SlimDX.DirectWrite.TextFormat(
dwFactory,
"Arial",
SlimDX.DirectWrite.FontWeight.Normal,
SlimDX.DirectWrite.FontStyle.Normal,
SlimDX.DirectWrite.FontStretch.Normal,
24,
"en-US"
);
textFormat.TextAlignment = SlimDX.DirectWrite.TextAlignment.Center;
textFormat.ParagraphAlignment = SlimDX.DirectWrite.ParagraphAlignment.Center;
// Query for a IDXGISurface.
// DirectWrite and DirectX10 can interoperate thru DXGI.
var surface = textureD3D10.AsSurface();
var rtp = new SlimDX.Direct2D.RenderTargetProperties();
rtp.MinimumFeatureLevel = SlimDX.Direct2D.FeatureLevel.Direct3D10;
rtp.Type = SlimDX.Direct2D.RenderTargetType.Hardware;
rtp.Usage = SlimDX.Direct2D.RenderTargetUsage.None;
rtp.PixelFormat = new SlimDX.Direct2D.PixelFormat(SlimDX.DXGI.Format.Unknown, SlimDX.Direct2D.AlphaMode.Premultiplied);
dwRenderTarget = SlimDX.Direct2D.RenderTarget.FromDXGI(d2Factory, surface, rtp);
// Brush used to DrawText
brushSolidWhite = new SlimDX.Direct2D.SolidColorBrush(
dwRenderTarget,
new SlimDX.Color4(1, 1, 1, 1)
);
// Think of the shared textureD3D10 as an overlay.
// The overlay needs to show the text but let the underlying triangle (or whatever)
// show thru, which is accomplished by blending.
var bsd = new SlimDX.Direct3D11.BlendStateDescription();
bsd.RenderTargets[0].BlendEnable = true;
bsd.RenderTargets[0].SourceBlend = SlimDX.Direct3D11.BlendOption.SourceAlpha;
bsd.RenderTargets[0].DestinationBlend = SlimDX.Direct3D11.BlendOption.InverseSourceAlpha;
bsd.RenderTargets[0].BlendOperation = SlimDX.Direct3D11.BlendOperation.Add;
bsd.RenderTargets[0].SourceBlendAlpha = SlimDX.Direct3D11.BlendOption.One;
bsd.RenderTargets[0].DestinationBlendAlpha = SlimDX.Direct3D11.BlendOption.Zero;
bsd.RenderTargets[0].BlendOperationAlpha = SlimDX.Direct3D11.BlendOperation.Add;
bsd.RenderTargets[0].RenderTargetWriteMask = SlimDX.Direct3D11.ColorWriteMaskFlags.All;
BlendState_Transparent = SlimDX.Direct3D11.BlendState.FromDescription(device.Handle, bsd);
// Load Effect. This includes both the vertex and pixel shaders.
// Also can include more than one technique.
var shaderByteCode = SlimDX.D3DCompiler.ShaderBytecode.CompileFromFile(
"texteffect.fx",
"fx_5_0",
SlimDX.D3DCompiler.ShaderFlags.EnableStrictness,
SlimDX.D3DCompiler.EffectFlags.None);
effect = new SlimDX.Direct3D11.Effect(device.Handle, shaderByteCode);
// create triangle vertex data, making sure to rewind the stream afterward
var verticesTriangle = new SlimDX.DataStream(30 * 3, true, true);
verticesTriangle.Write(new SlimDX.Vector3(0.0f, 0.5f, 0.5f));
verticesTriangle.Write(new SlimDX.Color4(1.0f, 0.0f, 0.0f, 1.0f));
verticesTriangle.Write(new SlimDX.Vector3(0.5f, -0.5f, 0.5f));
verticesTriangle.Write(new SlimDX.Color4(0.0f, 1.0f, 0.0f, 1.0f));
verticesTriangle.Write(new SlimDX.Vector3(-0.5f, -0.5f, 0.5f));
verticesTriangle.Write(new SlimDX.Color4(0.0f, 0.0f, 1.0f, 1.0f));
verticesTriangle.Position = 0;
// create the triangle vertex layout and buffer
var inputElements = new SlimDX.Direct3D11.InputElement[] {
new SlimDX.Direct3D11.InputElement("POSITION", 0, SlimDX.DXGI.Format.R32G32B32A32_Float, 0, 0),
new SlimDX.Direct3D11.InputElement("COLOR",0,SlimDX.DXGI.Format.R32G32B32A32_Float,16,0)
};
var layoutColor = new SlimDX.Direct3D11.InputLayout(device.Handle, effect.GetTechniqueByName("Color").GetPassByIndex(0).Description.Signature, inputElements);
var vertexBufferColor = new SlimDX.Direct3D11.Buffer(device.Handle, verticesTriangle, (int)verticesTriangle.Length, SlimDX.Direct3D11.ResourceUsage.Default, SlimDX.Direct3D11.BindFlags.VertexBuffer, SlimDX.Direct3D11.CpuAccessFlags.None, SlimDX.Direct3D11.ResourceOptionFlags.None, 0);
verticesTriangle.Close();
// create text 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 SlimDX.DataStream(30 * 4, true, true);
verticesText.Write(new SlimDX.Vector3(-1, 1, 0));
verticesText.Write(new SlimDX.Vector2(0, 0f));
verticesText.Write(new SlimDX.Vector3(1, 1, 0));
verticesText.Write(new SlimDX.Vector2(1, 0));
verticesText.Write(new SlimDX.Vector3(-1, -1, 0));
verticesText.Write(new SlimDX.Vector2(0, 1));
verticesText.Write(new SlimDX.Vector3(1, -1, 0));
verticesText.Write(new SlimDX.Vector2(1, 1));
verticesText.Position = 0;
// create the text vertex layout and buffer
layoutText = new SlimDX.Direct3D11.InputLayout(device.Handle, effect.GetTechniqueByName("Text").GetPassByIndex(0).Description.Signature, inputElements);
vertexBufferText = new SlimDX.Direct3D11.Buffer(device.Handle, verticesText, (int)verticesText.Length, SlimDX.Direct3D11.ResourceUsage.Default, SlimDX.Direct3D11.BindFlags.VertexBuffer, SlimDX.Direct3D11.CpuAccessFlags.None, SlimDX.Direct3D11.ResourceOptionFlags.None, 0);
verticesText.Close();
}
}
}
public void Render(Device device)
{
// Draw Text on the shared Texture2D
// Need to Acquire the shared texture for use with DirectX10
mutex10.Acquire(0, 100);
dwRenderTarget.BeginDraw();
dwRenderTarget.Clear(new SlimDX.Color4(0, 0, 0, 0));
const string text = "Hello world!";
dwRenderTarget.DrawText(text, textFormat, new System.Drawing.Rectangle(0, 0, device.Form.Width, device.Form.Height), brushSolidWhite);
dwRenderTarget.EndDraw();
mutex10.Release(0);
// Draw the shared texture2D onto the screen
// Need to Aquire the shared texture for use with DirectX11
mutex11.Acquire(0, 100);
var srv = new SlimDX.Direct3D11.ShaderResourceView(device.Handle, textureD3D11);
effect.GetVariableByName("g_textOverlay").AsResource().SetResource(srv);
device.Context.InputAssembler.InputLayout = layoutText;
device.Context.InputAssembler.PrimitiveTopology = SlimDX.Direct3D11.PrimitiveTopology.TriangleStrip;
device.Context.InputAssembler.SetVertexBuffers(0, new SlimDX.Direct3D11.VertexBufferBinding(vertexBufferText, 30 * 4, 0));
device.Context.OutputMerger.BlendState = BlendState_Transparent;
var currentTechnique = effect.GetTechniqueByName("Text");
for (int pass = 0; pass < currentTechnique.Description.PassCount; ++pass)
{
var Pass = currentTechnique.GetPassByIndex(pass);
System.Diagnostics.Debug.Assert(Pass.IsValid, "Invalid EffectPass");
Pass.Apply(device.Context);
device.Context.Draw(4, 0);
}
srv.Dispose();
mutex11.Release(0);
}