Draw large polygon sets as raster tiles (PolygonTiler)

api/android-for-here.api

@@ -191,6 +191,7 @@ public final class com.mapconductor.here.HereOverlayStacking {
   public final int polylineDrawOrder(int);
   public final com.here.sdk.mapview.MapLayerPriority rasterPriority();
   public final com.here.sdk.mapview.MapLayerPriority groundImagePriority();
+  public final com.here.sdk.mapview.MapLayerPriority polygonTilePriority();
 }
 public final class com.mapconductor.here.HereTypeAliasKt {
 }

src/main/java/com/mapconductor/here/HereMapViewController.kt

@@ -1,5 +1,8 @@
 package com.mapconductor.here
 
+import com.mapconductor.core.polygon.POLYGON_TILE_LAYER_ID
+import com.mapconductor.core.polygon.PolygonTiler
+import com.mapconductor.core.polygon.polygonTileRasterLayerState
 import HereMapDesignTypeChangeHandler
 import HereMapViewControllerInterface
 import com.here.sdk.core.Point2D
@@ -169,6 +172,19 @@ class HereMapViewController(
                 }
             },
         )
+
+        // Many polygons are drawn as raster tiles, shown through the same RasterLayer
+        // controller as the marker tiles (upsert / removeById, never the app's layers).
+        polygonController.tiler =
+            PolygonTiler().apply {
+                onTemplate = { template, tileSize ->
+                    if (template != null) {
+                        rasterLayerController.upsert(polygonTileRasterLayerState(template, tileSize))
+                    } else {
+                        rasterLayerController.removeById(POLYGON_TILE_LAYER_ID)
+                    }
+                }
+            }
     }
 
     override fun moveCamera(position: MapCameraPosition) = handleMoveCamera(position)

src/main/java/com/mapconductor/here/HereOverlayStacking.kt

@@ -29,6 +29,12 @@ internal object HereOverlayStacking {
     /** GroundImage: "traffic_on_route" レイヤーの手前（ラスターより上、map item より下）。 */
     fun groundImagePriority(): MapLayerPriority = MapLayerPriorityBuilder().renderedBeforeLayer(GROUND_IMAGE_ANCHOR).build()
 
+    /**
+     * ポリゴンのタイル（SDK が描くラスター）: ポリゴンの帯の一番下。GroundImage のアンカー
+     * "traffic_on_route" の直後（GroundImage より上、map item より下）。
+     */
+    fun polygonTilePriority(): MapLayerPriority = MapLayerPriorityBuilder().renderedAfterLayer(GROUND_IMAGE_ANCHOR).build()
+
     private const val RASTER_ANCHOR = "route"
     private const val GROUND_IMAGE_ANCHOR = "traffic_on_route"
 }

src/main/java/com/mapconductor/here/raster/HereRasterLayerOverlayRenderer.kt

@@ -13,6 +13,7 @@ import com.here.sdk.mapview.datasource.TileSource
 import com.here.sdk.mapview.datasource.TileUrlProviderCallback
 import com.here.sdk.mapview.datasource.TileUrlProviderFactory
 import com.here.sdk.mapview.datasource.TilingScheme
+import com.mapconductor.core.polygon.POLYGON_TILE_LAYER_ID
 import com.mapconductor.core.raster.RasterLayerEntityInterface
 import com.mapconductor.core.raster.RasterLayerOverlayRendererInterface
 import com.mapconductor.core.raster.RasterLayerSource
@@ -156,11 +157,14 @@ class HereRasterLayerOverlayRenderer(
 
     /**
      * アプリのラスターはラスターの帯（GroundImage・map item の下）。マーカーのタイルは
-     * マーカーの帯なので、ポリゴン等の map item より上（最後に描く）。
+     * マーカーの帯なので、ポリゴン等の map item より上（最後に描く）。ポリゴンのタイルは
+     * ポリゴンの帯の一番下（GroundImage の上、map item の下）。
      */
     private fun priorityFor(state: RasterLayerState): MapLayerPriority =
         if (state.id.startsWith("marker-tile-")) {
             MapLayerPriorityBuilder().renderedLast().build()
+        } else if (state.id == POLYGON_TILE_LAYER_ID) {
+            HereOverlayStacking.polygonTilePriority()
         } else {
             HereOverlayStacking.rasterPriority()
         }