Node / meshtastic / Meshtastic-Android / files / androidApp / src / google / kotlin / org / meshtastic / app / map / offline / terrain / TerrainSourceForZoom.kt

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T8b949e/*

* Copyright (c) 2026 Meshtastic LLC

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <https://www.gnu.org/licenses/>.

*/

Tff7b72package T7ee787org.meshtastic.app.map.offline.terrain

Tff7b72import T7ee787org.meshtastic.feature.map.terrain.MapterhornEndpoints

Tff7b72import T7ee787org.meshtastic.feature.map.terrain.TerrainSource

T8b949e/**

* Which [TerrainSource] tier a tile at [zoom] was downloaded into — matches how

* [org.meshtastic.feature.map.terrain.TerrainRegionExtractor.download] itself splits zoom ranges across the two tiers.

* Shared by [HillshadeTileProvider] and [ContourOverlay] so both read from the same tier for a given zoom.

*

* Zoom levels beyond what was actually downloaded (global-only regions past [MapterhornEndpoints.GLOBAL_MAX_ZOOM])

* simply have no tiles on disk — [org.meshtastic.feature.map.terrain.TerrainTileStore.readTile] returns `null` and both

* renderers degrade gracefully to "nothing here" rather than upscaling or crashing.

*/

Tff7b72internal Tff7b72fun Td2a8ffterrainSourceForZoomTb4b4b4(Te6edf3zoomTb4b4b4: Tffa657IntTb4b4b4)Tb4b4b4: Te6edf3TerrainSource Tff7b72=

Tff7b72if Tb4b4b4(Te6edf3zoom Tff7b72> Te6edf3MapterhornEndpointsTb4b4b4.Te6edf3GLOBAL_MAX_ZOOMTb4b4b4) Te6edf3TerrainSourceTb4b4b4.Te6edf3REGIONAL Tff7b72else Te6edf3TerrainSourceTb4b4b4.Te6edf3GLOBAL