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Data object SaveLayerConfig

interface struct SaveLayerConfig
Configuration data object for ICanvas3::saveLayerWithConfig. All fields are nullable. Constructed using the builder pattern via MakeBuilderFor<SaveLayerConfig>(). See graphics-Canvas_UserGuide.md for usage examples and backdrop filter behavior details.

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Fields

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bounds

Rect? — Optional
Optional bounds hint that limits the size of the offscreen layer allocation. When null, the offscreen buffer is sized to cover the entire current clip region. Note: This field is ignored when ::backdropFilter is set. To constrain the affected region with a backdrop filter, use clipRect()/clipRRect() before calling saveLayerWithConfig.

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paint

IPaint? — Optional
The paint applied when compositing the layer back at restore() time (alpha, blend mode, color filter). If null, no paint options would be applied.

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backdropFilter

IImageFilter? — Optional
Last modified on October 29, 2026