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Cache the surface ring's drop shadow to cut per-frame GPU cost #72

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Merged
danielchalmers merged 1 commit into from
Jul 25, 2026
Merged

Cache the surface ring's drop shadow to cut per-frame GPU cost #72

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14 changes: 12 additions & 2 deletions RadialActions/Pie/PieVisualBuilder.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -53,13 +53,23 @@ public static void AddSurfaceRing(
SnapsToDevicePixels = true,
};

UIElement surfaceElement = surfacePath;

if (!isHighContrast && ambientShadowEffect != null)
{
surfacePath.Effect = ambientShadowEffect.CloneCurrentValue();

// Wrap in a cached container so the expensive shadow blur is baked into a bitmap once instead of being re-evaluated on every animation frame.
surfaceElement = new Border
{
Child = surfacePath,
IsHitTestVisible = false,
CacheMode = new BitmapCache(VisualTreeHelper.GetDpi(canvas).PixelsPerDip),
};
}

Panel.SetZIndex(surfacePath, 0);
canvas.Children.Add(surfacePath);
Panel.SetZIndex(surfaceElement, 0);
canvas.Children.Add(surfaceElement);
}

public static CenterElements CreateCenterElements(
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