C# RenderTarget.Clear方法代碼示例

        public override void Render(RenderTarget pRender, float pPercent)
        {
            pRender.Clear(new RawColor4(0.9f, 0.85f, 0.75f, 1.0f));

            upgradesButton.Render(pRender, pPercent);
            playerShip.Render(pRender, pPercent);
        }

        static void Main()
        {
            var form = new RenderForm("KinectLight");
            form.Size = new System.Drawing.Size(1920,1200);

            var desc = new SwapChainDescription()
            {
                BufferCount = 1,
                ModeDescription = new ModeDescription(form.ClientSize.Width, form.ClientSize.Height, new Rational(60, 1), Format.R8G8B8A8_UNorm),
                IsWindowed = true,
                OutputHandle = form.Handle,
                SampleDescription = new SampleDescription(1, 0),
                SwapEffect = SwapEffect.Discard,
                Usage = Usage.RenderTargetOutput
            };

            SharpDX.Direct3D10.Device1 device;
            SwapChain swapChain;
            SharpDX.Direct3D10.Device1.CreateWithSwapChain(DriverType.Hardware, DeviceCreationFlags.BgraSupport, desc, SharpDX.Direct3D10.FeatureLevel.Level_10_1, out device, out swapChain);

            var d2dFactory = new SharpDX.Direct2D1.Factory();
            var surface = Surface.FromSwapChain(swapChain, 0);

            RenderTarget dc = new RenderTarget(d2dFactory, surface, new RenderTargetProperties(new PixelFormat(Format.Unknown, AlphaMode.Premultiplied)));

            MainGame.Instance.Height = form.ClientSize.Height;
            MainGame.Instance.Width = form.ClientSize.Width;
            GameTime gameTime = new GameTime();

            var config = new HttpSelfHostConfiguration("http://localhost:8080");

            config.Routes.MapHttpRoute(
                "API Default", "api/{controller}/{action}/{name}",
                new { id = RouteParameter.Optional });

            HttpSelfHostServer server = new HttpSelfHostServer(config);
            server.OpenAsync().Wait();

            RenderLoop.Run(form, () =>
            {
                gameTime.StartFrame();
                MainGame.Instance.Update(gameTime);
                dc.BeginDraw();
                dc.Clear(Colors.White);
                MainGame.Instance.Render(dc);
                var res = dc.EndDraw();
                swapChain.Present(1, PresentFlags.None);
                //Thread.Sleep(1);
            });

            server.Dispose();
            MainGame.Instance.Dispose();
            dc.Dispose();
            surface.Dispose();
            d2dFactory.Dispose();
            device.Dispose();
            swapChain.Dispose();
        }

        public override void Render(RenderTarget pRender, float pPercent)
        {
            pRender.Clear(new RawColor4(0.9f, 0.85f, 0.75f, 1.0f));

            MainTitle.Render(pRender, pPercent);
            NewGameButton.Render(pRender, pPercent);
            OptionsButton.Render(pRender, pPercent);
            QuitButton.Render(pRender, pPercent);
        }

        public void Create3dObjects()
        {
            //Create RenderWindow
            RenderWindowInstance = new ModelRenderWindow();
            FormInstance = RenderWindowInstance.CreateWindow(1080,1240,FormStartPosition.CenterScreen);

            //Create SwapChain
            SwapChainCreator = new ModelSwapChainDesc();
            SwapChainD = SwapChainCreator.CreateSwapChain(2, Usage.RenderTargetOutput, FormInstance.Handle, true, 0, 0, new Rational(60, 1), Format.R8G8B8A8_UNorm, 1,0,SwapChainFlags.AllowModeSwitch, SwapEffect.Discard);

            //Create Device
            Device.CreateWithSwapChain(DriverType.Hardware, DeviceCreationFlags.BgraSupport, SwapChainD, out GraphicsDevice, out NewSwapChain);

            //Create Back buffer
            BackBuffer = Surface.FromSwapChain(NewSwapChain, 0);

            //Create Factory
            FactoryD2D FactoryInstance = new FactoryD2D();

            //Create RenderTarget
            RenderTargetInstance = new ModelRenderTarget();
            RenderTarget = RenderTargetInstance.CreateRenderTarget(SharpDX.Direct2D1.FeatureLevel.Level_DEFAULT, new PixelFormat(Format.Unknown, SharpDX.Direct2D1.AlphaMode.Ignore), RenderTargetType.Default, RenderTargetUsage.None, BackBuffer, FactoryInstance);

            RenderLoop.Run(FormInstance, () =>
            {

                RenderTarget.BeginDraw();
                RenderTarget.Transform = Matrix3x2.Identity;
                RenderTarget.Clear(Color.White);

                using (var brush = new SolidColorBrush(RenderTarget, Color.Red))
                {
                    //for (int x = 0; x < RenderTarget.Size.Width; x += 10)
                    //    RenderTarget.DrawLine(new Vector2(x, 0), new Vector2(x, RenderTarget.Size.Height), brush, 0.5f);

                    //for (int y = 0; y < RenderTarget.Size.Height; y += 10)
                    //    RenderTarget.DrawLine(new Vector2(0, y), new Vector2(RenderTarget.Size.Width, y), brush, 0.5f);
                    RenderTarget.DrawLine(new Vector2(300, 10), new Vector2(300, 300), brush,1.5f);
                   // RenderTarget.FillRectangle(new RectangleF(RenderTarget.Size.Width / 2 - 50, RenderTarget.Size.Height / 2 - 50, 100, 100), brush);
                }

              //  RenderTarget.DrawRectangle(
                   // new RectangleF(RenderTarget.Size.Width / 2 - 100, RenderTarget.Size.Height / 2 - 100, 200, 200),
                   // new SolidColorBrush(RenderTarget, Color.CornflowerBlue));

                RenderTarget.EndDraw();

                NewSwapChain.Present(0, PresentFlags.None);
            });

            RenderTarget.Dispose();
            NewSwapChain.Dispose();
            GraphicsDevice.Dispose();
        }

        public override void Render( RenderTarget target ) {
            target.Clear( new RawColor4( 1.0f, 1.0f, 1.0f, 1.0f ) );
            Brush brush = null;
            switch( rnd.Next( 3 ) ) {
                case 0: brush = resCache["RedBrush"  ] as Brush; break;
                case 1: brush = resCache["GreenBrush"] as Brush; break;
                case 2: brush = resCache["BlueBrush" ] as Brush; break;
            }
            target.DrawRectangle( new RawRectangleF( x, y, x + w, y + h ), brush );

            x = x + dx;
            y = y + dy;
            if ( x >= ActualWidth - w || x <= 0 ) {
                dx = -dx;
            }
            if ( y >= ActualHeight - h || y <= 0 ) {
                dy = -dy;
            }
        }

        private static void Main()
        {
            var form = new RenderForm("SharpDX - MiniTri Direct2D - Direct3D 10 Sample");

            // SwapChain description
            var desc = new SwapChainDescription()
                           {
                               BufferCount = 1,
                               ModeDescription = 
                                   new ModeDescription(form.ClientSize.Width, form.ClientSize.Height,
                                                       new Rational(60, 1), Format.R8G8B8A8_UNorm),
                               IsWindowed = true,
                               OutputHandle = form.Handle,
                               SampleDescription = new SampleDescription(1, 0),
                               SwapEffect = SwapEffect.Discard,
                               Usage = Usage.RenderTargetOutput
                           };

            // Create Device and SwapChain
            Device1 device;
            SwapChain swapChain;
            Device1.CreateWithSwapChain(DriverType.Hardware, DeviceCreationFlags.BgraSupport, desc, FeatureLevel.Level_10_0, out device, out swapChain);

            var d2dFactory = new SharpDX.Direct2D1.Factory();

            int width = form.ClientSize.Width;
            int height = form.ClientSize.Height;

            var rectangleGeometry = new RoundedRectangleGeometry(d2dFactory, new RoundedRectangle() { RadiusX = 32, RadiusY = 32, Rect = new RectangleF(128, 128, width - 128 * 2, height-128 * 2) });

            // Ignore all windows events
            Factory factory = swapChain.GetParent<Factory>();
            factory.MakeWindowAssociation(form.Handle, WindowAssociationFlags.IgnoreAll);

            // New RenderTargetView from the backbuffer
            Texture2D backBuffer = Texture2D.FromSwapChain<Texture2D>(swapChain, 0);
            var renderView = new RenderTargetView(device, backBuffer);

            Surface surface = backBuffer.QueryInterface<Surface>();


            var d2dRenderTarget = new RenderTarget(d2dFactory, surface,
                                                            new RenderTargetProperties(new PixelFormat(Format.Unknown, AlphaMode.Premultiplied)));

            var solidColorBrush = new SolidColorBrush(d2dRenderTarget, Color.White);

            Stopwatch stopwatch = new Stopwatch();
            stopwatch.Start();

            // Main loop
            RenderLoop.Run(form, () =>
                                      {
                                          d2dRenderTarget.BeginDraw();
                                          d2dRenderTarget.Clear(Color.Black);
                                          solidColorBrush.Color = new Color4(1, 1, 1, (float)Math.Abs(Math.Cos(stopwatch.ElapsedMilliseconds * .001)));
                                          d2dRenderTarget.FillGeometry(rectangleGeometry, solidColorBrush, null);
                                          d2dRenderTarget.EndDraw();

                                          swapChain.Present(0, PresentFlags.None);
                                      });

            // Release all resources
            renderView.Dispose();
            backBuffer.Dispose();
            device.ClearState();
            device.Flush();
            device.Dispose();
            device.Dispose();
            swapChain.Dispose();
            factory.Dispose();
        }

        static void Main()
        {
            var form = new RenderForm("FUN STUFF PHYSXS");

            // SwapChain description
            var desc = new SwapChainDescription()
                           {
                               BufferCount = 1,
                               ModeDescription =
                                   new ModeDescription(form.ClientSize.Width, form.ClientSize.Height,
                                                       new Rational(60, 1), Format.R8G8B8A8_UNorm),
                               IsWindowed = true,
                               OutputHandle = form.Handle,
                               SampleDescription = new SampleDescription(1, 0),
                               SwapEffect = SwapEffect.Discard,
                               Usage = Usage.RenderTargetOutput
                           };

            // Create Device and SwapChain
            Device device;
            SwapChain swapChain;
            Device.CreateWithSwapChain(DriverType.Hardware, DeviceCreationFlags.BgraSupport, new SharpDX.Direct3D.FeatureLevel[] { SharpDX.Direct3D.FeatureLevel.Level_10_0 }, desc, out device, out swapChain);

            var d2dFactory = new SharpDX.Direct2D1.Factory();

            // Ignore all windows events
            Factory factory = swapChain.GetParent<Factory>();
            factory.MakeWindowAssociation(form.Handle, WindowAssociationFlags.IgnoreAll);

            // New RenderTargetView from the backbuffer
            Texture2D backBuffer = Texture2D.FromSwapChain<Texture2D>(swapChain, 0);
            var renderView = new RenderTargetView(device, backBuffer);

            Surface surface = backBuffer.QueryInterface<Surface>();

            var d2dRenderTarget = new RenderTarget(d2dFactory, surface,
                                                            new RenderTargetProperties(new PixelFormat(Format.Unknown, AlphaMode.Premultiplied)));

            var solidColorBrush = new SolidColorBrush(d2dRenderTarget, Color.White);

            var sim = new Simulation();

            // Main loop
            RenderLoop.Run(form, () =>
                                      {
                                          d2dRenderTarget.BeginDraw();

                                          int width = form.ClientSize.Width;
                                          int height = form.ClientSize.Height;
                                          var simScaleX = sim.SimBounds.MaxX - sim.SimBounds.MinX;
                                          var simScaleY = sim.SimBounds.MaxY - sim.SimBounds.MinY;
                                          var viewScaleX = sim.ViewBounds.MaxX - sim.ViewBounds.MinX;
                                          var viewScaleY = sim.ViewBounds.MaxY - sim.ViewBounds.MinY;

                                          d2dRenderTarget.Clear(Color.Black);
                                          foreach (Body body in sim.State)
                                          {
                                              var x = Convert.ToSingle((body.Pos.X - sim.SimBounds.MinX) * width / simScaleX);
                                              var y = Convert.ToSingle((body.Pos.Y - sim.SimBounds.MinY) * height / simScaleY);
                                              var xRad = Convert.ToSingle((body.Radius) * width / viewScaleX);
                                              var yRad = Convert.ToSingle((body.Radius) * height / viewScaleY);
                                              var elipse = new EllipseGeometry(d2dFactory, new Ellipse(new Vector2(x, y), xRad, yRad));
                                              d2dRenderTarget.FillGeometry(elipse, solidColorBrush, null);
                                          }

                                          d2dRenderTarget.EndDraw();

                                          sim.Step();
                                          swapChain.Present(0, PresentFlags.None);
                                      });

            // Release all resources
            renderView.Dispose();
            backBuffer.Dispose();
            device.ImmediateContext.ClearState();
            device.ImmediateContext.Flush();
            device.Dispose();
            device.Dispose();
            swapChain.Dispose();
            factory.Dispose();
        }

//.........這裏部分代碼省略.........

            // 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;

 private void window_Render_1(object sender, EventArgs e, RenderTarget target)
 {
     target.Clear(SharpDX.Color.Black);
     if (Program.Drone != null)
         Program.Drone.RenderVideo(target);
 }

        public IDrawingTarget BeginDraw(Color? clearColor)
        {
            #if NETFX_CORE
            var surface = _texture.QueryInterface<Surface>();
            #else
            var surface = _texture.AsSurface();
            #endif

            var rtProperties = new RenderTargetProperties
            {
                DpiX = 96,
                DpiY = 96,
                Type = RenderTargetType.Default,
                PixelFormat = new PixelFormat(Format.Unknown, AlphaMode.Premultiplied)
            };

            var renderTarget = new RenderTarget(_factory, surface, rtProperties);

            renderTarget.BeginDraw();
            // required to clear the render target
            // not required on all machines, seems to be a driver decision.
            renderTarget.Clear(clearColor != null ? clearColor.Value.import() : (Color4?)null);

            var state = new DrawingState();
            var transform = new DrawingTransform();
            var drawingTarget = new DrawingTarget(state, transform, renderTarget, _width, _height);

            var target = new DrawingTargetSplitter(
                _backend,
                state,
                transform,
                drawingTarget,
                drawingTarget,
                drawingTarget,
                drawingTarget,
                drawingTarget,
                () =>
                    {
                        drawingTarget.Dispose();

                        renderTarget.EndDraw();
                        renderTarget.Dispose();
                        surface.Dispose();
                    });

            var pixelAligner = PixelAligningDrawingTarget.Create(target, target.Dispose, state, transform);
            return pixelAligner;
        }