C# SolidColorBrush.Dispose方法代碼示例

        public Result DrawGlyphRun(object clientDrawingContext, float baselineOriginX, float baselineOriginY, MeasuringMode measuringMode, GlyphRun glyphRun, GlyphRunDescription glyphRunDescription, ComObject clientDrawingEffect)
        {
            var pathGeometry = new PathGeometry(_d2DFactory);
            var geometrySink = pathGeometry.Open();

            var fontFace = glyphRun.FontFace;
            if (glyphRun.Indices.Length > 0)
                fontFace.GetGlyphRunOutline(glyphRun.FontSize, glyphRun.Indices, glyphRun.Advances, glyphRun.Offsets, glyphRun.IsSideways, glyphRun.BidiLevel % 2 != 0, geometrySink);
            geometrySink.Close();
            geometrySink.Dispose();
            fontFace.Dispose();

            var matrix = new Matrix3x2()
            {
                M11 = 1,
                M12 = 0,
                M21 = 0,
                M22 = 1,
                M31 = baselineOriginX,
                M32 = baselineOriginY
            };

            var transformedGeometry = new TransformedGeometry(_d2DFactory, pathGeometry, matrix);

            var  brushColor = (Color4)Color.Black;

            if (clientDrawingEffect != null && clientDrawingEffect is ColorDrawingEffect)
                brushColor = (clientDrawingEffect as ColorDrawingEffect).Color;

            var brush = new SolidColorBrush(_renderTarget, brushColor);
            
            _renderTarget.DrawGeometry(transformedGeometry, brush);
            _renderTarget.FillGeometry(transformedGeometry, brush);

            pathGeometry.Dispose();
            transformedGeometry.Dispose();
            brush.Dispose();

            return SharpDX.Result.Ok;
        }

//.........這裏部分代碼省略.........
                : (CCVerticalTextAlignment.Top == verticleAlignement) ? 0                    // align to top
                : (imageHeight - boundingRect.Bottom) * 0.5f;                                   // align to center


            SharpDX.WIC.Bitmap sharpBitmap = null;
            WicRenderTarget sharpRenderTarget = null;
            SolidColorBrush solidBrush = null;

            try
            {
                // Select our pixel format
                var pixelFormat = SharpDX.WIC.PixelFormat.Format32bppPRGBA;

                // create our backing bitmap
                sharpBitmap = new SharpDX.WIC.Bitmap(FactoryImaging, imageWidth, imageHeight, pixelFormat, BitmapCreateCacheOption.CacheOnLoad);

                // Create the render target that we will draw to
                sharpRenderTarget = new WicRenderTarget(Factory2D, sharpBitmap, new RenderTargetProperties());
                // Create our brush to actually draw with
                solidBrush = new SolidColorBrush(sharpRenderTarget, foregroundColor);

                // Begin the drawing
                sharpRenderTarget.BeginDraw();

                if (textDefinition.isShouldAntialias)
                    sharpRenderTarget.AntialiasMode = AntialiasMode.Aliased;

                // Clear it
                sharpRenderTarget.Clear(TransparentColor);

                // Draw the text to the bitmap
                sharpRenderTarget.DrawTextLayout(new Vector2(boundingRect.X, yOffset), textLayout, solidBrush);

                // End our drawing which will commit the rendertarget to the bitmap
                sharpRenderTarget.EndDraw();

                // Debugging purposes
                //var s = "Label4";
                //SaveToFile(@"C:\Xamarin\" + s + ".png", _bitmap, _renderTarget);

                // The following code creates a .png stream in memory of our Bitmap and uses it to create our Textue2D
                Texture2D tex = null;

                using (var memStream = new MemoryStream())
                {
                    using (var encoder = new PngBitmapEncoder(FactoryImaging, memStream))
                    using (var frameEncoder = new BitmapFrameEncode(encoder))
                    {
                        frameEncoder.Initialize();
                        frameEncoder.WriteSource(sharpBitmap);
                        frameEncoder.Commit();
                        encoder.Commit();
                    }
                    // Create the Texture2D from the png stream
                    tex = Texture2D.FromStream(CCDrawManager.SharedDrawManager.XnaGraphicsDevice, memStream);
                }

                // Return our new CCTexture2D created from the Texture2D which will have our text drawn on it.
                return new CCTexture2D(tex);
            }
            catch (Exception exc)
            {
                CCLog.Log("CCLabel-Windows: Unable to create the backing image of our text.  Message: {0}", exc.StackTrace);
            }
            finally
            {
                if (sharpBitmap != null)
                {
                    sharpBitmap.Dispose();
                    sharpBitmap = null;
                }

                if (sharpRenderTarget != null)
                {
                    sharpRenderTarget.Dispose();
                    sharpRenderTarget = null;
                }

                if (solidBrush != null)
                {
                    solidBrush.Dispose();
                    solidBrush = null;
                }

                if (textFormat != null)
                {
                    textFormat.Dispose();
                    textFormat = null;
                }

                if (textLayout != null)
                {
                    textLayout.Dispose();
                    textLayout = null;
                }
            }

            // If we have reached here then something has gone wrong.
            return new CCTexture2D();
        }

        public void DisplayName(string name)
        {
            var brush = new SolidColorBrush(renderTarget, Color4.White);
            var layoutRect = new SharpDX.RectangleF(0, 0, bounds.Width, bounds.Height);

            renderTarget.BeginDraw();
            renderTarget.Clear(Color4.Black);
            renderTarget.DrawRectangle(new SharpDX.RectangleF(0, 0, bounds.Width, bounds.Height), brush, 10f);
            renderTarget.DrawText(name, textFormat, layoutRect, solidColorBrush);

            //int nx = 4;
            //int ny = 4;
            //for (int i = 0; i < nx - 1; i++)
            //    for (int j = 0; j < ny - 1; j++)
            //    {
            //        float x = (float)bounds.Width / (float)nx * (i + 1);
            //        float y = (float)bounds.Height / (float)ny * (j + 1);

            //        const int w = 10;
            //        renderTarget.DrawLine(new Vector2(x - w, y), new Vector2(x + w, y), brush, 1);
            //        renderTarget.DrawLine(new Vector2(x, y - w), new Vector2(x, y + w), brush, 1);
            //    }

            int nx = 4;
            int ny = 4;
            for (int i = 0; i < nx - 1; i++)
            {
                float x = (float)bounds.Width / (float)nx * (i + 1);
                renderTarget.DrawLine(new Vector2(x, 0), new Vector2(x, bounds.Height), brush, 1);
            }
            for (int i = 0; i < ny - 1; i++)
            {
                float y = (float)bounds.Height / (float)ny * (i + 1);
                renderTarget.DrawLine(new Vector2(0, y), new Vector2(bounds.Width, y), brush, 1);
            }
            renderTarget.EndDraw();

            brush.Dispose();
        }

//.........這裏部分代碼省略.........
            // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            // EFFECT SETUP ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

            // Effect 1 : BitmapSource - take decoded image data and get a BitmapSource from it
            var bitmapSourceEffect = new d2.Effects.BitmapSource(d2dContext);
            bitmapSourceEffect.WicBitmapSource = formatConverter;

            // Effect 2 : GaussianBlur - give the bitmapsource a gaussian blurred effect
            var gaussianBlurEffect = new d2.Effects.GaussianBlur(d2dContext);
            gaussianBlurEffect.SetInput(0, bitmapSourceEffect.Output, true);
            gaussianBlurEffect.StandardDeviation = 5f;

            // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            // OVERLAY TEXT SETUP ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

            var textFormat = new dw.TextFormat(dwFactory, "Arial", 15f); // create the text format of specified font configuration

            // draw a long text to show the automatic line wrapping
            var textToDraw = "Some long text to show the drawing of preformatted "
                             + "glyphs using DirectWrite on the Direct2D surface."
                             + " Notice the automatic wrapping of line if it exceeds desired width.";

            // create the text layout - this improves the drawing performance for static text
            // as the glyph positions are precalculated
            var textLayout = new dw.TextLayout(dwFactory, textToDraw, textFormat, 300f, 1000f);

            var textBrush = new d2.SolidColorBrush(d2dContext, Color.LightGreen);

            // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            // RENDER TARGET SETUP ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

            // create the d2d bitmap description using default flags (from SharpDX samples) and 96 DPI
            var d2dBitmapProps = new d2.BitmapProperties1(d2PixelFormat, 96, 96, d2.BitmapOptions.Target | d2.BitmapOptions.CannotDraw);

            // the render target
            var d2dRenderTarget = new d2.Bitmap1(d2dContext, new Size2(pixelWidth, pixelHeight), d2dBitmapProps);
            d2dContext.Target = d2dRenderTarget; // associate bitmap with the d2d context

            // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            // DRAWING ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

            // slow preparations - fast drawing:
            d2dContext.BeginDraw();
            d2dContext.DrawImage(gaussianBlurEffect);
            d2dContext.DrawTextLayout(new Vector2(5f, 5f), textLayout, textBrush);
            d2dContext.EndDraw();

            // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            // IMAGE SAVING ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

            // delete the output file if it already exists
            if (System.IO.File.Exists(outputPath)) System.IO.File.Delete(outputPath);

            // use the appropiate overload to write either to stream or to a file
            var stream = new wic.WICStream(imagingFactory, outputPath, NativeFileAccess.Write);

            // select the image encoding format HERE
            var encoder = new wic.PngBitmapEncoder(imagingFactory);
            encoder.Initialize(stream);

            var bitmapFrameEncode = new wic.BitmapFrameEncode(encoder);
            bitmapFrameEncode.Initialize();
            bitmapFrameEncode.SetSize(pixelWidth, pixelHeight);
            bitmapFrameEncode.SetPixelFormat(ref wicPixelFormat);

            // this is the trick to write D2D1 bitmap to WIC
            var imageEncoder = new wic.ImageEncoder(imagingFactory, d2dDevice);
            imageEncoder.WriteFrame(d2dRenderTarget, bitmapFrameEncode, new wic.ImageParameters(d2PixelFormat, 96, 96, 0, 0, pixelWidth, pixelHeight));

            bitmapFrameEncode.Commit();
            encoder.Commit();

            // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            // CLEANUP ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

            // dispose everything and free used resources

            bitmapFrameEncode.Dispose();
            encoder.Dispose();
            stream.Dispose();
            textBrush.Dispose();
            textLayout.Dispose();
            textFormat.Dispose();
            formatConverter.Dispose();
            gaussianBlurEffect.Dispose();
            bitmapSourceEffect.Dispose();
            d2dRenderTarget.Dispose();
            inputStream.Dispose();
            decoder.Dispose();
            d2dContext.Dispose();
            dwFactory.Dispose();
            imagingFactory.Dispose();
            d2dDevice.Dispose();
            dxgiDevice.Dispose();
            d3dDevice.Dispose();
            defaultDevice.Dispose();

            // show the result
            System.Diagnostics.Process.Start(outputPath);
        }

//.........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 Result DrawStrikethrough(object clientDrawingContext, float baselineOriginX, float baselineOriginY, ref Strikethrough strikethrough, ComObject clientDrawingEffect)
        {
            var rect = new SharpDX.RectangleF(0, strikethrough.Offset, strikethrough.Width, strikethrough.Offset + strikethrough.Thickness);
            var rectangleGeometry = new RectangleGeometry(_d2DFactory, rect);
            var matrix = new Matrix3x2()
            {
                M11 = 1,
                M12 = 0,
                M21 = 0,
                M22 = 1,
                M31 = baselineOriginX,
                M32 = baselineOriginY
            };
            var transformedGeometry = new TransformedGeometry(_d2DFactory, rectangleGeometry, matrix);
            
            var  brushColor = (Color4)Color.Black;

            if (clientDrawingEffect != null && clientDrawingEffect is ColorDrawingEffect)
                brushColor = (Color4)(clientDrawingEffect as ColorDrawingEffect).Color;

            var brush = new SolidColorBrush(_renderTarget, brushColor);

            _renderTarget.DrawGeometry(transformedGeometry, brush);
            _renderTarget.FillGeometry(transformedGeometry, brush);

            rectangleGeometry.Dispose();
            transformedGeometry.Dispose();
            brush.Dispose();

            return Result.Ok;
        }

        public Result DrawUnderline(object clientDrawingContext, float baselineOriginX, float baselineOriginY, ref Underline underline, ComObject clientDrawingEffect)
        {
            var rect = new SharpDX.RectangleF(0, underline.Offset, underline.Width, underline.Offset + underline.Thickness);
            var rectangleGeometry = new RectangleGeometry(_d2DFactory, rect);
            var matrix = new Matrix3x2()
            {
                M11 = 1,
                M12 = 0,
                M21 = 0,
                M22 = 1,
                M31 = baselineOriginX,
                M32 = baselineOriginY
            };
            var transformedGeometry = new TransformedGeometry(_d2DFactory, rectangleGeometry, matrix);

            var brushColor = new Color4(1, 0, 0, 0);
            if (clientDrawingEffect != null && clientDrawingEffect is ColorDrawingEffect)
                brushColor = (clientDrawingEffect as ColorDrawingEffect).Color;

            var brush = new SolidColorBrush(_renderTarget, brushColor);

            _renderTarget.DrawGeometry(transformedGeometry, brush);
            _renderTarget.FillGeometry(transformedGeometry, brush);

            rectangleGeometry.Dispose();
            transformedGeometry.Dispose();
            brush.Dispose();

            return SharpDX.Result.Ok;
        }