如何在UWP C#中实现SVG到WriteableBitmap的转换

using System;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Media.Imaging;
using Windows.UI.Xaml.Shapes;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Media;
using SvgDocument = SharpVectors.Dom.SvgDocument;
using SvgConverter = SharpVectors.Converters.SvgConverter;
using Windows.UI.Xaml.Media.Imaging;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using System.IO;

public class SVGtoWriteableBitmapConverter
{
    public async Task<WriteableBitmap> ConvertSvgToWriteableBitmap(string svgFilePath)
    {
        // 加载SVG文件
        var svgDocument = await LoadSvgFile(svgFilePath);
        
        // 创建目标位图
        var renderTargetBitmap = new RenderTargetBitmap();
        await renderTargetBitmap.RenderAsync(svgDocument, svgDocument.ViewBox);
        
        // 转换为WriteableBitmap
        var writeableBitmap = new WriteableBitmap(renderTargetBitmap.PixelWidth, renderTargetBitmap.PixelHeight);
        var pixelBuffer = await renderTargetBitmap.GetPixelsAsync();
        var pixels = pixelBuffer.ToArray();
        using (var stream = writeableBitmap.PixelBuffer.AsStream())
        {
            await stream.WriteAsync(pixels, 0, pixels.Length);
        }
        
        return writeableBitmap;
    }
    
    private async Task<SvgDocument> LoadSvgFile(string svgFilePath)
    {
        using (var stream = await Windows.Storage.StorageFile.GetFileFromPathAsync(svgFilePath).OpenStreamForReadAsync())
        {
            var svgDocument = SvgConverter.Load(stream);
            return svgDocument;
        }
    }
}

// 在需要显示SVG图像的地方调用ConvertSvgToWriteableBitmap方法
var converter = new SVGtoWriteableBitmapConverter();
var writeableBitmap = await converter.ConvertSvgToWriteableBitmap("path/to/svg/file.svg");

// 设置WriteableBitmap为画布的内容
myCanvas.Background = new ImageBrush { ImageSource = writeableBitmap };