如果取消里面的两行注释，可以得到更加扭曲和旋转的效果（Gif是由LINQPad生成多次截图而来，实际为静态图）：
然后加入线条：
for (var i = 0; i < 4; ++i) { target.Transform = Matrix3x2.Identity; brush.Color = ColorFromHsl(r.NextFloat(0,1), 1.0f, 0.3f); target.DrawLine( r.NextVector2(Vector2.Zero, new Vector2(width, height)), r.NextVector2(Vector2.Zero, new Vector2(width, height)), brush, 3.0f); }
效果（Gif是由LINQPad生成多次截图而来，实际为静态图）：
Direct2D的骚操作
Direct2D中内置了许多特效，如阴影(Shadow)等，这里我们需要用到的是位移特效(Displacement)和水流特效(Turbulence)，为了实现特效，需要加入一个Bitmap层，整体代码如下：
byte[] SaveD2DBitmap(int width, int height, string text) { using var wic = new WIC.ImagingFactory2(); using var d2d = new D2D.Factory(); using var wicBitmap = new WIC.Bitmap(wic, width, height, WIC.PixelFormat.Format32bppPBGRA, WIC.BitmapCreateCacheOption.CacheOnDemand); using var target = new D2D.WicRenderTarget(d2d, wicBitmap, new D2D.RenderTargetProperties()); using var dwriteFactory = new SharpDX.DirectWrite.Factory(); using var brush = new D2D.SolidColorBrush(target, Color.Yellow); using var encoder = new WIC.PngBitmapEncoder(wic); // PngBitmapEncoder using var ms = new MemoryStream(); using var dc = target.QueryInterface<D2D.DeviceContext>(); using var bmpLayer = new D2D.Bitmap1(dc, target.PixelSize, new D2D.BitmapProperties1(new D2D.PixelFormat(SharpDX.DXGI.Format.B8G8R8A8_UNorm, D2D.AlphaMode.Premultiplied), d2d.DesktopDpi.Width, d2d.DesktopDpi.Height, D2D.BitmapOptions.Target)); var r = new Random(); encoder.Initialize(ms); D2D.Image oldTarget = dc.Target; { dc.Target = bmpLayer; dc.BeginDraw(); var textFormat = new DWrite.TextFormat(dwriteFactory, "Times New Roman", DWrite.FontWeight.Bold, DWrite.FontStyle.Normal, width / text.Length); for (int charIndex = 0; charIndex < text.Length; ++charIndex) { using var layout = new DWrite.TextLayout(dwriteFactory, text[charIndex].ToString(), textFormat, float.MaxValue, float.MaxValue); var layoutSize = new Vector2(layout.Metrics.Width, layout.Metrics.Height); using var b2 = new D2D.LinearGradientBrush(dc, new D2D.LinearGradientBrushProperties { StartPoint = Vector2.Zero, EndPoint = layoutSize, }, new D2D.GradientStopCollection(dc, new[] { new D2D.GradientStop{ Position = 0.0f, Color = ColorFromHsl(r.NextFloat(0, 1), 1.0f, 0.8f) }, new D2D.GradientStop{ Position = 1.0f, Color = ColorFromHsl(r.NextFloat(0, 1), 1.0f, 0.8f) }, })); var position = new Vector2(charIndex * width / text.Length, r.NextFloat(0, height - layout.Metrics.Height)); dc.Transform = Matrix3x2.Translation(-layoutSize / 2) * Matrix3x2.Skew(r.NextFloat(0, 0.5f), r.NextFloat(0, 0.5f)) * //Matrix3x2.Rotation(r.NextFloat(0, MathF.PI * 2)) * Matrix3x2.Translation(position + layoutSize / 2); dc.DrawTextLayout(Vector2.Zero, layout, b2); } for (var i = 0; i < 4; ++i) { target.Transform = Matrix3x2.Identity; brush.Color = ColorFromHsl(r.NextFloat(0, 1), 1.0f, 0.3f); target.DrawLine( r.NextVector2(Vector2.Zero, new Vector2(width, height)), r.NextVector2(Vector2.Zero, new Vector2(width, height)), brush, 3.0f); } target.EndDraw(); } Color background = ColorFromHsl(r.NextFloat(0, 1), 1.0f, 0.3f); // for (var frameId = -10; frameId < 10; ++frameId) { dc.Target = null; using var displacement = new D2D.Effects.DisplacementMap(dc); displacement.SetInput(0, bmpLayer, true); displacement.Scale = 100.0f; // Math.Abs(frameId) * 10.0f; var turbulence = new D2D.Effects.Turbulence(dc); displacement.SetInputEffect(1, turbulence); dc.Target = oldTarget; dc.BeginDraw(); dc.Clear(background); dc.DrawImage(displacement); dc.EndDraw(); using (var frame = new WIC.BitmapFrameEncode(encoder)) { frame.Initialize(); frame.SetSize(wicBitmap.Size.Width, wicBitmap.Size.Height); var pixelFormat = wicBitmap.PixelFormat; frame.SetPixelFormat(ref pixelFormat); frame.WriteSource(wicBitmap); frame.Commit(); } } encoder.Commit(); return ms.ToArray(); }
注意此代码使用了using var语句，是C# 8.0的using declaration功能，可以用using (var )语句代替。
效果如下（Gif是由LINQPad生成多次截图而来，实际为静态图）：
