Merge "[80/n] Use single surface as default strategy" into main

        // Decides whether to use a single surface or multiple surfaces for the letterbox.

        // The primary trade-off is memory usage versus rendering performance.

        //

        // A single surface is used for letterboxes with rounded corners on opaque activities

        // and always for Bubble. In all other cases, such as for letterboxes with straight corners

        // or for those with rounded corners on a translucent activity, we use multiple surfaces to

        // ensure better performance.

        // The multi surfaces approach is only used when the activity is transparent. The single

        // surface approach is the default one because it is easier and less expensive to handle.

        // TODO(b/377875146): Improve heuristic for single/multiple surfaces

        currentMode = when {

            event.isBubble -> SINGLE_SURFACE

            event.isTranslucent -> MULTIPLE_SURFACES

            letterboxConfiguration.isLetterboxActivityCornersRounded() -> SINGLE_SURFACE

            else -> MULTIPLE_SURFACES

            else -> SINGLE_SURFACE

        }

        supportsInputSurface = event.supportsInput

    }

    }

    @Test

    fun `LetterboxMode is MULTIPLE_SURFACES with no rounded corners`() {

    fun `LetterboxMode is SINGLE_SURFACE with no rounded corners`() {

        runTestScenario { r ->

            r.configureRoundedCornerRadius(false)

            r.configureLetterboxMode()

            r.checkLetterboxModeIsMultiple()

            r.checkLetterboxModeIsSingle()

        }

    }