layerPositionedContent renders layers in reverse order

[jeffbarge]

Environment

• Android OS version: 14
• Devices affected: Moto 5g
• Maps SDK Version: 11.7.1

Observed behavior and steps to reproduce

When using a Composable function with more than 1 layer, and adding to the map via layerPositionedContent, the first layer added renders on top, which is backwards from when adding the same composable to the mapContent.

Example:

    @Composable
    private fun PolylineBase() {
        val lineSource = rememberGeoJsonSourceState {
            data = GeoJSONData(
                Feature.fromGeometry(
                    LineString.fromLngLats(
                listOf(
                    Point.fromLngLat(0.0, 0.0), Point.fromLngLat(1.0, 1.0))
            )))
        }

        LineLayer(sourceState = lineSource) {
            lineColor = ColorValue(
                Color(0xFF999999)
            )
            lineWidth = DoubleValue(12.0)
            lineBorderWidth = DoubleValue(2.0)
            lineBorderColor = ColorValue(Color(0xFF333333))
        }

        val geoJsonSource = rememberGeoJsonSourceState {
            data = GeoJSONData(Point.fromLngLat(0.0, 0.0))
        }

        SymbolLayer(
            sourceState = geoJsonSource
        ) {
            iconAnchor = IconAnchorValue.BOTTOM
            textField = FormattedValue("Hello Helsinki")
            textColor = ColorValue(Color.Red)
            textColorTransition = Transition(durationMillis = 1000)
            textSize = DoubleValue(20.0)
            textAllowOverlap = BooleanValue(true)
        }
    }

Note that the text from the SymbolLayer renders beneath the LineLayer, even though it was added last.

Expected behavior

The last Layer added should render on top. This is the behavior when adding layers to MapContent.

Notes / preliminary analysis

Additional links and references

[jush]

Thanks for the issue. We'll let you know once we've fixed it.

(internal ticket: MAPSAND-1924)