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CloseOptimizes rendering of a VisualElement that has multiple descendants with nested masks.
This option reduces stencil state changes and capitalizes on consecutive
mask push/pop operations for efficiency.
Apply this option to a VisualElement with multiple nested masks among its descendants. For example, a child element
has the overflow: hidden;
style with rounded corners or SVG background.
The following illustration shows the number of batches in a single-level masking, a nested masking, and a nested masking with MaskContainer.
The yellow color indicates the masking elements. The orange color indicates the masking element with MaskContainer applied.
The numbers indicate the number of batches.
A: Single-level masking (1 batch)
B: Nested masking (5 batches)
C: Nested masking with MaskContainer (2 batches)
Note: Don't use GroupTransform in scenarios with many subtrees, where each
subtree uses two or more levels of masking. This helps minimize consecutive
push/push or pop/pop operations.
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