From d9fea603f8185b30d3409532918f3d4d8fbf24fd Mon Sep 17 00:00:00 2001
From: Elena Torro <elenatorro@gmail.com>
Date: Tue, 2 Jun 2026 17:11:57 +0200
Subject: [PATCH] :bug: Fix clear canvas

---
 render-wasm/src/render.rs          |  7 +++++--
 render-wasm/src/render/surfaces.rs | 14 +++++++++++---
 2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/render-wasm/src/render.rs b/render-wasm/src/render.rs
index 057287f5e9..503e949c84 100644
--- a/render-wasm/src/render.rs
+++ b/render-wasm/src/render.rs
@@ -2180,8 +2180,11 @@ impl RenderState {
         let frame_type = self.render_shape_tree_partial(base_object, tree, timestamp, true)?;
 
         if !self.options.is_interactive_transform() {
-            self.surfaces
-                .draw_tile_atlas_to_backbuffer(&self.viewbox, &self.tile_viewbox);
+            self.surfaces.draw_tile_atlas_to_backbuffer(
+                &self.viewbox,
+                &self.tile_viewbox,
+                self.background_color,
+            );
         }
 
         match frame_type {
diff --git a/render-wasm/src/render/surfaces.rs b/render-wasm/src/render/surfaces.rs
index de33abb7e0..04d6948371 100644
--- a/render-wasm/src/render/surfaces.rs
+++ b/render-wasm/src/render/surfaces.rs
@@ -518,10 +518,18 @@ impl Surfaces {
         self.tiles.clear();
     }
 
-    pub fn draw_tile_atlas_to_backbuffer(&mut self, viewbox: &Viewbox, tile_viewbox: &TileViewbox) {
+    pub fn draw_tile_atlas_to_backbuffer(
+        &mut self,
+        viewbox: &Viewbox,
+        tile_viewbox: &TileViewbox,
+        background: skia::Color,
+    ) {
         self.tiles.update(viewbox, tile_viewbox);
-        self.backbuffer.canvas().draw_atlas(
-            &self.tile_atlas.image_snapshot(),
+        let atlas_image = self.tile_atlas.image_snapshot();
+        let canvas = self.backbuffer.canvas();
+        canvas.clear(background);
+        canvas.draw_atlas(
+            &atlas_image,
             &self.tiles.transforms,
             &self.tiles.textures,
             None,