如何防止 WPF 裁剪矢量图形

我有一个 SVG 图形，它是位于 400x400 视框中心的 264x264 正方形，正方形周围的 68 像素填充是图像的重要组成部分，我希望它显示在 WPF 中。我正在使用一个库将 SVG 绘图转换为 WPF 绘图图像，将其塞入页面以预览后的输出如下所示：

<Page x:Class="Page1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
  xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
  mc:Ignorable="d" 
  d:DesignHeight="400" d:DesignWidth="400"
Title="Page1">
<Image>
    <Image.Source>
        <DrawingImage>
            <DrawingImage.Drawing>
                <DrawingGroup xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:svg="http://sharpvectors.codeplex.com/runtime/">
                    <DrawingGroup.Children>
                        <DrawingGroup>
                            <DrawingGroup.Children>
                                <DrawingGroup>
                                    <DrawingGroup.Children>
                                        <DrawingGroup>
                                            <DrawingGroup.Children>
                                                <GeometryDrawing Brush="#FFAAFFAA">
                                                    <GeometryDrawing.Pen>
                                                        <Pen Brush="#FF000000" Thickness="10" StartLineCap="Flat" EndLineCap="Flat" LineJoin="Miter" />
                                                    </GeometryDrawing.Pen>
                                                    <GeometryDrawing.Geometry>
                                                        <RectangleGeometry RadiusX="0" RadiusY="0" Rect="68,68,264,264" />
                                                    </GeometryDrawing.Geometry>
                                                </GeometryDrawing>
                                            </DrawingGroup.Children>
                                            <DrawingGroup.ClipGeometry>
                                                <RectangleGeometry Rect="0,0,400,400" />
                                            </DrawingGroup.ClipGeometry>
                                            <DrawingGroup.Transform>
                                                <TranslateTransform X="0" Y="0" />
                                            </DrawingGroup.Transform>
                                        </DrawingGroup>
                                    </DrawingGroup.Children>
                                </DrawingGroup>
                            </DrawingGroup.Children>
                            <DrawingGroup.ClipGeometry>
                                <RectangleGeometry Rect="0,0,400,400" />
                            </DrawingGroup.ClipGeometry>
                        </DrawingGroup>
                    </DrawingGroup.Children>
                </DrawingGroup>
            </DrawingImage.Drawing>
        </DrawingImage>
    </Image.Source>
</Image>
</Page>

生成的图像是一个完全填满其容器的正方形，而不是像我想要的那样在其周围留下一些空白空间。如何让 WPF 保留该空间而不是裁剪它？