Tile source fixes (#236)

* Fix a bug with empty layers

* Switch to XYZ

* Fix tile url

* Execute apt-get update

.github/actions/install-driver/action.yml

@@ -8,12 +8,10 @@ runs:
     # On Ubuntu 22.04 (currently used) using the PPA introduces SEGVs.
     #- name: Use oibaf PPA for drivers
     #  shell: bash
-    #  run: |
-    #    sudo apt-get update -y -qq
-    #    sudo add-apt-repository ppa:oibaf/graphics-drivers -y
+    #  run: sudo apt-get update -y -qq && sudo add-apt-repository ppa:oibaf/graphics-drivers -y
     - name: Install Mesa Dependencies
       shell: bash
-      run: sudo apt-get install -y libegl1-mesa libgl1-mesa-dri libxcb-xfixes0-dev mesa-vulkan-drivers
+      run: sudo apt-get update -y -qq && sudo apt-get install -y libegl1-mesa libgl1-mesa-dri libxcb-xfixes0-dev mesa-vulkan-drivers
     - name: Install wgpu-info
       shell: bash
       # Rev is for 0.14.1: https://github.com/gfx-rs/wgpu/tree/v0.14.1

.github/actions/install-system-dependencies/action.yml

@@ -12,7 +12,7 @@ runs:
       if: runner.os == 'Linux'
       shell: bash
       run: |
-        sudo apt-get install -y \
+        sudo apt-get update -y -qq && sudo apt-get install -y \
           protobuf-compiler \
           libwayland-dev libxkbcommon-dev # Required for winit
     - name: Install System Dependencies (macOS)

maplibre/src/io/source_client.rs

@@ -68,11 +68,11 @@ where
     }
 
     pub async fn fetch(&self, coords: &WorldTileCoords) -> Result<Vec<u8>, SourceFetchError> {
-        let tile_coords = coords.into_tile(TileAddressingScheme::TMS).unwrap();
+        let tile_coords = coords.into_tile(TileAddressingScheme::XYZ).unwrap();
         self.inner_client
             .fetch(
                 format!(
-                    "https://maps.tuerantuer.org/europe_germany/{z}/{x}/{y}.pbf",
+                    "https://maps.tuerantuer.org/europe_germany/{z}/{x}/{y}",
                     x = tile_coords.x,
                     y = tile_coords.y,
                     z = tile_coords.z

maplibre/src/io/transferables.rs

@@ -38,6 +38,8 @@ pub trait LayerTessellated: Send {
 
     fn coords(&self) -> WorldTileCoords;
 
+    fn is_empty(&self) -> bool;
+
     fn to_stored_layer(self) -> StoredLayer;
 }
 
@@ -119,6 +121,10 @@ impl LayerTessellated for DefaultLayerTesselated {
         self.coords
     }
 
+    fn is_empty(&self) -> bool {
+        self.buffer.usable_indices == 0
+    }
+
     fn to_stored_layer(self) -> StoredLayer {
         StoredLayer::TessellatedLayer {
             coords: self.coords,

maplibre/src/render/render_commands.rs

@@ -143,11 +143,16 @@ impl RenderCommand<(IndexEntry, TileShape)> for DrawTile {
             &entry.coords
         );
 
+        let index_range = entry.indices_buffer_range();
+
+        if index_range.is_empty() {
+            tracing::error!("Tried to draw a vector tile without any vertices");
+            return RenderCommandResult::Failure;
+        }
+
         pass.set_stencil_reference(reference);
-        pass.set_index_buffer(
-            buffer_pool.indices().slice(entry.indices_buffer_range()),
-            INDEX_FORMAT,
-        );
+
+        pass.set_index_buffer(buffer_pool.indices().slice(index_range), INDEX_FORMAT);
         pass.set_vertex_buffer(
             0,
             buffer_pool.vertices().slice(entry.vertices_buffer_range()),

maplibre/src/stages/populate_tile_store_stage.rs

@@ -64,6 +64,11 @@ impl<E: Environment> Stage for PopulateTileStore<E> {
                     tile_repository.put_layer(layer);
                 }
                 Message::LayerTessellated(message) => {
+                    // TODO: Is it fine to ignore layers without any vertices?
+                    if message.is_empty() {
+                        continue;
+                    }
+
                     let layer: StoredLayer = message.to_stored_layer();
 
                     tracing::debug!(

web/src/platform/singlethreaded/transferables.rs

@@ -190,6 +190,11 @@ impl LayerTessellated for FlatBufferTransferable {
         data.coords().unwrap().into()
     }
 
+    fn is_empty(&self) -> bool {
+        let data = unsafe { root_as_flat_layer_tessellated_unchecked(&self.data[self.start..]) };
+        data.usable_indices() == 0
+    }
+
     fn to_stored_layer(self) -> StoredLayer {
         let data = unsafe { root_as_flat_layer_tessellated_unchecked(&self.data[self.start..]) };
         let vertices = data