UIKit interop on iOS

Haze captures pixels that Compose draws into its graphics layer. Content hosted by UIKitView or UIKitViewController is rendered by UIKit, so it is not part of that captured Compose layer by default.

Overlay placement

UIKitInteropProperties.placedAsOverlay changes where UIKit is composited relative to Compose's Metal canvas; it does not make UIKit pixels available to Haze.

placedAsOverlay	Placement	Effect on Haze
false (default)	UIKit stays below the Compose Metal canvas. Compose draws a transparent cut-out where the UIKit view appears.	The UIKit pixels are outside Haze's captured source.
true	UIKit is placed above the Compose Metal canvas.	The UIKit view covers any overlapping Compose or Haze content; its pixels are still outside Haze's captured source.

This follows Compose Multiplatform's overlay placement guidance and the UIKitInteropProperties API source.

interactionMode controls touch handling and isNativeAccessibilityEnabled controls native accessibility exposure. Both are independent of pixel capture and do not change whether Haze can use UIKit content as a source.

Support

UIKit content	Can Haze capture it?	Requirement
WKWebView in UIKitView	No	Use a renderer that draws the visual content into the Compose layer before Haze captures it.
AVPlayerLayer hosted by UIKitView	No	Use a video rendering path that draws into the Compose layer before Haze captures it.
Other UIKitView or UIKitViewController content	No	Visual content must render into the Compose layer before it can be captured by Haze.

Use an iOS UIKit interop view when native composition or interaction is the goal. To blur or glass its visual content with Haze, choose a rendering path whose pixels are drawn into the same Compose layer as hazeSource.