From c8a6d8e1f7feee3ff4521838ff2b4d1402b058e7 Mon Sep 17 00:00:00 2001
From: Patrick Walton <pcwalton@mimiga.net>
Date: Tue, 28 Jul 2020 14:27:53 -0700
Subject: [PATCH] Allow clip paths to nest in the canvas API.

Closes #372.
---
 canvas/src/lib.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/canvas/src/lib.rs b/canvas/src/lib.rs
index 897b96f1..ba1dc25b 100644
--- a/canvas/src/lib.rs
+++ b/canvas/src/lib.rs
@@ -358,8 +358,11 @@ impl CanvasRenderingContext2D {
 
         let mut clip_path = ClipPath::new(outline);
         clip_path.set_fill_rule(fill_rule);
-        let clip_path_id = self.canvas.scene.push_clip_path(clip_path);
+        if let Some(existing_clip_path) = self.current_state.clip_path.take() {
+            clip_path.set_clip_path(Some(existing_clip_path));
+        }
 
+        let clip_path_id = self.canvas.scene.push_clip_path(clip_path);
         self.current_state.clip_path = Some(clip_path_id);
     }