使用位图变换缩放图像在win2d中生成模糊图像

using Microsoft.Graphics.Canvas;
using Microsoft.Graphics.Canvas.Effects;
using Microsoft.Graphics.Canvas.UI.Xaml;
using Windows.UI.Xaml.Controls;

public sealed partial class MainPage : Page
{
    public MainPage()
    {
        this.InitializeComponent();
    }

    private async void canvasControl_Draw(CanvasControl sender, CanvasDrawEventArgs args)
    {
        // 加载原始图像
        CanvasBitmap originalBitmap = await CanvasBitmap.LoadAsync(sender, "originalImage.jpg");

        // 创建高斯模糊效果
        GaussianBlurEffect blurEffect = new GaussianBlurEffect
        {
            Source = originalBitmap,
            BlurAmount = 5f, // 模糊半径
            BorderMode = EffectBorderMode.Hard,
        };

        // 创建位图变换
        BitmapTransform transform = new BitmapTransform
        {
            ScaledWidth = (float)sender.ActualWidth,
            ScaledHeight = (float)sender.ActualHeight,
        };

        // 应用位图变换和高斯模糊效果
        CanvasBitmap blurredBitmap = new CanvasRenderTarget(sender, sender.ActualWidth, sender.ActualHeight);
        using (CanvasDrawingSession ds = blurredBitmap.CreateDrawingSession())
        {
            ds.DrawImage(blurEffect, transform);
        }

        // 绘制模糊图像
        args.DrawingSession.DrawImage(blurredBitmap);
    }
}