1 files changed, 8 insertions, 3 deletions
diff --git a/src/renderer/heatmap.rs b/src/renderer/heatmap.rs
index c4af7a6..0c4f93f 100644
--- a/src/renderer/heatmap.rs
+++ b/src/renderer/heatmap.rs
@@ -150,7 +150,12 @@ impl super::Renderer for Renderer {
     /// The given callback will be called when a track has been rendered and merged into the
     /// accumulator, to allow for UI feedback. The passed parameter is the number of tracks that have
     /// been rendered since the last call.
-    fn prepare(zoom: u32, tracks: &[Vec<Coordinates>], tick: Sender<()>) -> Result<HeatCounter> {
+    fn prepare(
+        &self,
+        zoom: u32,
+        tracks: &[Vec<Coordinates>],
+        tick: Sender<()>,
+    ) -> Result<HeatCounter> {
         let mut heatcounter = TileLayer::from_pixel([0].into());
 
         for track in tracks {
@@ -183,7 +188,7 @@ impl super::Renderer for Renderer {
     ///
     /// Note that this function internally uses `rayon` for parallization. If you want to limit the
     /// number of threads used, set up the global [`rayon::ThreadPool`] first.
-    fn colorize(layer: HeatCounter, tx: Sender<RenderedTile>) -> Result<()> {
+    fn colorize(&self, layer: HeatCounter, tx: Sender<RenderedTile>) -> Result<()> {
         let max = layer.pixels().map(|l| l.0[0]).max().unwrap_or_default();
         if max == 0 {
             return Ok(());
@@ -203,7 +208,7 @@ impl super::Renderer for Renderer {
             })
     }
 
-    fn tile_count(layer: &HeatCounter) -> Result<u64> {
+    fn tile_count(&self, layer: &HeatCounter) -> Result<u64> {
         Ok(layer.tile_count().try_into().unwrap())
     }
 }