[core] add raster-dem source type and hillshade layer type (#10642)

1 files changed, 27 insertions, 0 deletions

diff --git a/src/mbgl/tile/raster_dem_tile_worker.cpp b/src/mbgl/tile/raster_dem_tile_worker.cpp
new file mode 100644
index 0000000000..ed8573788f
--- /dev/null
+++ b/src/mbgl/tile/raster_dem_tile_worker.cpp
@@ -0,0 +1,27 @@
+#include <mbgl/tile/raster_dem_tile_worker.hpp>
+#include <mbgl/tile/raster_dem_tile.hpp>
+#include <mbgl/renderer/buckets/hillshade_bucket.hpp>
+#include <mbgl/actor/actor.hpp>
+#include <mbgl/util/premultiply.hpp>
+
+namespace mbgl {
+
+RasterDEMTileWorker::RasterDEMTileWorker(ActorRef<RasterDEMTileWorker>, ActorRef<RasterDEMTile> parent_)
+    : parent(std::move(parent_)) {
+}
+
+void RasterDEMTileWorker::parse(std::shared_ptr<const std::string> data, uint64_t correlationID) {
+    if (!data) {
+        parent.invoke(&RasterDEMTile::onParsed, nullptr, correlationID); // No data; empty tile.
+        return;
+    }
+
+    try {
+        auto bucket = std::make_unique<HillshadeBucket>(decodeImage(*data));
+        parent.invoke(&RasterDEMTile::onParsed, std::move(bucket), correlationID);
+    } catch (...) {
+        parent.invoke(&RasterDEMTile::onError, std::current_exception(), correlationID);
+    }
+}
+
+} // namespace mbgl