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I'm still struggling on this issue after our other requirements are finished. I found we can use GeometrySink alike classes to implement the outline effect; but I'm not familiar with c++; see this article: http://msdn.microsoft.com/en-us/library/dd317121.aspx

More complex shapes can be created by using the ID2D1GeometrySink interface to specify a series of figures composed of lines, curves, and arcs. The ID2D1GeometrySink is passed to the Open method of an ID2D1PathGeometry to generate a complex geometry. ID2D1SimplifiedGeometrySink can also be used with the DirectWrite API to extract path outlines of formatted text for artistic rendering.

If you have any suggestions or ideas, please let me know.

Best regards, Howard

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2 回答 2

1

我使用SharpDX。这是一段代码（这是正在进行的工作，我刚刚得到它的渲染，但它可能是你正在寻找的东西）。

   public class OutlineTextRender : SharpDX.DirectWrite.TextRenderer
    {
        readonly Factory _factory;
        readonly RenderTarget _surface;
        readonly Brush _brush;

        public OutlineTextRender(RenderTarget surface, Brush brush)
        {
            _factory = surface.Factory;
            _surface = surface;
            _brush = brush;
        }

        public Result DrawGlyphRun(object clientDrawingContext, float baselineOriginX, float baselineOriginY, MeasuringMode measuringMode, SharpDX.DirectWrite.GlyphRun glyphRun, SharpDX.DirectWrite.GlyphRunDescription glyphRunDescription, ComObject clientDrawingEffect)
        {
            using (PathGeometry path = new PathGeometry(_factory))
            {
                using (GeometrySink sink = path.Open())
                {
                    glyphRun.FontFace.GetGlyphRunOutline(glyphRun.FontSize, glyphRun.Indices, glyphRun.Advances, glyphRun.Offsets, glyphRun.IsSideways, (glyphRun.BidiLevel % 2) > 0, sink);

                    sink.Close();
                }

                Matrix matrix = Matrix.Identity;
                matrix = matrix * Matrix.Translation(baselineOriginX, baselineOriginY, 0);

                TransformedGeometry transformedGeometry = new TransformedGeometry(_factory, path, matrix);

                _surface.DrawGeometry(transformedGeometry, _brush);

            }
            return new Result();
        }

        public Result DrawInlineObject(object clientDrawingContext, float originX, float originY, SharpDX.DirectWrite.InlineObject inlineObject, bool isSideways, bool isRightToLeft, ComObject clientDrawingEffect)
        {
            return new Result();
        }

        public Result DrawStrikethrough(object clientDrawingContext, float baselineOriginX, float baselineOriginY, ref SharpDX.DirectWrite.Strikethrough strikethrough, ComObject clientDrawingEffect)
        {
            return new Result();
        }

        public Result DrawUnderline(object clientDrawingContext, float baselineOriginX, float baselineOriginY, ref SharpDX.DirectWrite.Underline underline, ComObject clientDrawingEffect)
        {
            return new Result();
        }

        public SharpDX.DirectWrite.Matrix GetCurrentTransform(object clientDrawingContext)
        {
            return new SharpDX.DirectWrite.Matrix();
        }

        public float GetPixelsPerDip(object clientDrawingContext)
        {
            return 0;
        }

        public bool IsPixelSnappingDisabled(object clientDrawingContext)
        {
            return true; ;
        }

        public IDisposable Shadow
        {
            get
            {
                return null;
            }
            set
            {
               // throw new NotImplementedException();
            }
        }

        public void Dispose()
        {

        }
    }

    public void strokeText(string text, float x, float y, float maxWidth)
    {
        // http://msdn.microsoft.com/en-us/library/windows/desktop/dd756692(v=vs.85).aspx

        // FIXME make field
        SharpDX.DirectWrite.Factory factory = new SharpDX.DirectWrite.Factory(SharpDX.DirectWrite.FactoryType.Shared);

        TextFormat format = new TextFormat(factory, "Verdana", 50);
        SharpDX.DirectWrite.TextLayout layout = new SharpDX.DirectWrite.TextLayout(factory, text, format, 50, 1000);





        using (var brush = new SolidColorBrush(_surface, CurrentColor))
        {
            var render = new OutlineTextRender(_surface, brush);

            layout.Draw(render, x, y);

            //_surface.DrawTextLayout(new DrawingPointF(x, y), layout, brush);

         //   _surface.DrawGlyphRun(new DrawingPointF(x, y), run, brush, MeasuringMode.Natural);
        }

    }
于 2012-04-29T14:41:04.657 回答
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我把它变成了一个通用的 XAML 大纲文本渲染器。感谢您发布。

https://blogs.msdn.microsoft.com/theuxblog/2016/07/09/outline-text-from-a-windows-10-store-xaml-app-using-sharpdx/

干杯，保罗

于 2016-07-09T20:12:23.793 回答