在Xamarin Droid上渲染SVG Path的NGraphics效果不佳

Question

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＆＃13;

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＆＃13;

＆＃13;

＆＃13;

我在Xamarin Droid应用程序中使用NGraphics，但渲染图像的分辨率非常低，我该如何改进？

我使用SvgReader创建了一个Graphic对象，然后我用它来绘制控件CanvasCanvas中的Draw方法。我在创建SvgReader时尝试使用dpi选项进行游戏，但无济于事。

using (StringReader stringReader = new StringReader(svgDefinition))
{
    SvgReader svgReader = new SvgReader(stringReader);
    Graphic = svgReader.Graphic;
}

public override void Draw(Canvas canvas)
{   
    var canvasCanvas = new CanvasCanvas(canvas);
    Graphic?.Draw(canvasCanvas);
}

使用示例SVG，您可以点击并查看我在左侧所包含的96x96图像后的质量，在右侧您可以看到正在生成的内容，摘自三星Galaxy A5上的截图：

Answer 1

更改DPI值无法解决您所看到的问题。当绘图命令使用实际单位（如cm，mm，pt，pc）时，PixelsPerInch属性用于。

使用当前版本NGraphics SvgReader class，它看起来像是在宽度和高度属性指定的维度上渲染SVG，并且可选地约束到SVG文件中的viewBox或viewPort属性。一旦SVG数据被渲染，它就缩放到图像视图。要获得清晰的图像，您需要使SVG的宽度和高度与目标的预期画布一样大或大。

我从100x125框中绘制的Noun Project中获取了一个SVG。我将SVG加载到Adobe Illustrator中并将其重新调整为600x800并将其保存到.ai。然后我将.ai文件加载到PaintCode中并复制它生成的web svg。这个SVG在我在Android上使用的测试应用程序中呈现出色。

我希望有一种更简单的方法可以做到这一点，但这有助于验证解决问题的方法。