C# RenderTarget.DrawGeometry方法代碼示例

 public void RenderScatterGeometry(RenderTarget renderTarget)
 {
     double[] x = curve.X;
     double[] y = curve.Y;
     int length = x.Length;
     double xScale, xOffset, yScale, yOffset;
     xScale = graphToCanvas.Matrix.M11;
     xOffset = graphToCanvas.Matrix.OffsetX - this.xOffsetMarker;
     yScale = graphToCanvas.Matrix.M22;
     yOffset = graphToCanvas.Matrix.OffsetY - this.yOffsetMarker;
     bool[] include = curve.includeMarker;
     StrokeStyleProperties properties = new StrokeStyleProperties();
     properties.LineJoin = LineJoin.MiterOrBevel;
     StrokeStyle strokeStyle = new StrokeStyle(renderTarget.Factory, properties);
     for (int i = 0; i < length; ++i)
     {
         if (include[i])
         {
             renderTarget.Transform = (Matrix3x2)Matrix.Translation((float)(x[i] * xScale + xOffset), (float)(y[i] * yScale + yOffset), 0);
             renderTarget.FillGeometry(Geometry, FillBrush);
             renderTarget.DrawGeometry(Geometry, Brush, (float)StrokeThickness, strokeStyle);
         }
     }
     renderTarget.Transform = Matrix3x2.Identity;
 }

        /// <summary>
        /// render the circle to specific render target of Direct2D1
        /// </summary>
        /// <param name="renderTarget"></param>
        public void Render2D(RenderTarget renderTarget, SharpDX.Direct2D1.Brush brush)
        {
            // check if the geometry is dirty
            if (isGeometryDirty)
            {
                // dispose the old geometry
                if (TriangleGeometry != null)
                {
                    TriangleGeometry.Dispose();
                }

                // create a new one
                TriangleGeometry = new PathGeometry(renderTarget.Factory);

                // fill the geometry struct
                using (GeometrySink Geo_Sink = TriangleGeometry.Open())
                {
                    // create the figure
                    Geo_Sink.BeginFigure(mp_P1, FigureBegin.Filled);
                    Geo_Sink.AddLine(mp_P2);
                    Geo_Sink.AddLine(mp_P3);
                    Geo_Sink.EndFigure(FigureEnd.Closed);

                    // close the mesh
                    Geo_Sink.Close();
                }

                // set the geometry that is the final
                isGeometryDirty = false;
            }

            // draw the wireframe of the triangle
            renderTarget.DrawGeometry(TriangleGeometry, brush, _LineWidth);

            if (fillTheTriangle)
            {
                // check if we must renew the brush
                if (fillColorDirty)
                {
                    // dispose the old brush
                    if (fillColorBrush != null)
                        fillColorBrush.Dispose();

                    // create the new one
                    fillColorBrush = new SolidColorBrush(renderTarget, fillColor);

                    // set that the color is the correct
                    fillColorDirty = false;
                }

                // fill the triangle
                renderTarget.FillGeometry(TriangleGeometry, fillColorBrush);
            }
        }

        public void Render2D(RenderTarget renderTarget, Brush brush)
        {
            #region Update Color Brush
            // if the brush is dirty renew it
            if (m_isLineColorBrushDirty && !m_useDefaultColor)
            {
                // clean the color brush
                if (m_lineColorBrush != null)
                    m_lineColorBrush.Dispose();

                // allocate a new one
                m_lineColorBrush = new SolidColorBrush(renderTarget, m_lineColor);

                // clean the flag
                m_isLineColorBrushDirty = false;
            }
            #endregion

            if (m_path.Count > 0)
            {
                // Update geometry
                if (isGeometryDirty)
                {
                    if (m_sharpGeometry != null)
                        m_sharpGeometry.Dispose();

                    m_sharpGeometry = new PathGeometry(renderTarget.Factory);

                    using (GeometrySink Geo_Sink = m_sharpGeometry.Open())
                    {
                        int count = m_path.Count;

                        // create the path
                        Geo_Sink.BeginFigure(m_path[0].GetVector2(), FigureBegin.Filled);
                        for (int i = 1; i < count; i++)
                        {
                            Geo_Sink.AddLine(m_path[i].GetVector2());
                        }
                        Geo_Sink.EndFigure(FigureEnd.Open);
                        Geo_Sink.Close();
                    }

                    isGeometryDirty = false;
                }

                // check if we use other color
                if (m_useDefaultColor || m_lineColorBrush == null)
                {
                    renderTarget.DrawGeometry(m_sharpGeometry, brush, m_lineWidth);
                }
                else
                {
                    renderTarget.DrawGeometry(m_sharpGeometry, m_lineColorBrush, m_lineWidth);
                }
            }
        }

//.........這裏部分代碼省略.........
            // ---------------------------------------------------------------------------------------------------
            // 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();
        }

        public override void Render(RenderTarget renderTarget)
        {
            if (!IsVisible) return;

            CurrentBorderBrush.Resource.Opacity = this.Opacity;
            CurrentBackgroundBrush.Resource.Opacity = this.Opacity;

            renderTarget.Transform = this.Transform;

            //TODO: Check if we need a second rect for this...
            renderTarget.PushAxisAlignedClip(this.ClippingRectangle, AntialiasMode.Aliased);

            try {
                if (DrawBackground) {
                    renderTarget.FillGeometry(_backgroundGeometry, CurrentBackgroundBrush.Resource);
                    //if (CurrentBitmap != null)
                    //	renderTarget.DrawBitmap(CurrentBitmap.Resource, Opacity, BitmapInterpolationMode.Linear);
                }

                if (DrawBorder)
                    renderTarget.DrawGeometry(_backgroundGeometry, CurrentBorderBrush.Resource);

                if (DrawText && !String.IsNullOrEmpty(_text))
                    renderTarget.DrawTextLayout(new DrawingPointF(TextIndent, 0f), RenderedText, CurrentFontBrush.Resource);

                base.Render(renderTarget);
            } finally {
                renderTarget.PopAxisAlignedClip();
            }
        }

        public void Render2D(RenderTarget renderTarget, Brush brush)
        {
            #region Update Color Brush
            // if the brush is dirty renew it
            if (m_isLineColorBrushDirty && !m_useDefaultColor)
            {
                // clean the color brush
                if (m_lineColorBrush != null)
                    m_lineColorBrush.Dispose();

                // allocate a new one
                m_lineColorBrush = new SolidColorBrush(renderTarget, m_lineColor);

                // clean the flag
                m_isLineColorBrushDirty = false;
            }
            #endregion

            if(isGeometryDirty)
            {
                if (m_sharpGeometry != null)
                    m_sharpGeometry.Dispose();

                m_sharpGeometry = new PathGeometry(renderTarget.Factory);

                using(GeometrySink Geo_Sink = m_sharpGeometry.Open())
                {
                    // draw the rectangle
                    Geo_Sink.BeginFigure(m_start.GetVector2(), FigureBegin.Filled);
                    Geo_Sink.AddLine(new SharpDX.Vector2(m_start.x, m_end.y));
                    Geo_Sink.AddLine(m_end.GetVector2());
                    Geo_Sink.AddLine(new SharpDX.Vector2(m_end.x, m_start.y));
                    Geo_Sink.EndFigure(FigureEnd.Closed);
                    Geo_Sink.Close();
                }

                isGeometryDirty = false;
            }

            // check if we use other color
            if (m_useDefaultColor || m_lineColorBrush == null)
            {
                renderTarget.DrawGeometry(m_sharpGeometry, brush, m_lineWidth);
            }
            else
            {
                renderTarget.DrawGeometry(m_sharpGeometry, m_lineColorBrush, m_lineWidth);
            }
        }