SKGLView 比 SKCanvasView 暗得多

Question

我的应用程序的主屏幕是通过 SKCanvasView 呈现的。颜色准确地反映了我在代码中指定的值。

如果我换入 SKGLView（硬件加速版本），不更改其他代码，结果会变暗 60%：

    <!--<skia:SKCanvasView PaintSurface="OnCanvasViewPaintSurface" />-->
    <skia:SKGLView PaintSurface="OnCanvasViewPaintSurface" />

为什么会发生这种情况，我该如何解决？

Answer 1

答案可以在这里找到：https://github.com/mono/SkiaSharp/issues/299#issuecomment-331990904

I found the solution to the problem. There is a specific attribute that is set in the splash screen style, but is not unset (for some reason) when the style is changed.

In the splashscreen style, note this:
<item name="android:backgroundDimEnabled">true</item>
Docs: https://developer.xamarin.com/api/field/Android.Resource+Attribute.BackgroundDimEnabled

This is not unset when the style is switched. So, to fix this, just set it to false:
<item name="android:backgroundDimEnabled">false</item>
Here is a repository that demonstrates this: https://github.com/mattleibow/AndroidGLSurfaceViewTests

SKGLView 比 SKCanvasView 暗得多

SKGLView much darker than SKCanvasView

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