From 10f5f95a80951adac0bd94d9dbb50a816a72b659 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?H=C3=A9ctor=20Ram=C3=B3n=20Jim=C3=A9nez?=
 <hector0193@gmail.com>
Date: Thu, 9 Apr 2020 04:26:02 +0200
Subject: [PATCH] Stop generating empty `Mesh2D` in `canvas::Frame`

---
 wgpu/src/widget/canvas/frame.rs | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/wgpu/src/widget/canvas/frame.rs b/wgpu/src/widget/canvas/frame.rs
index df1d7df5..940be402 100644
--- a/wgpu/src/widget/canvas/frame.rs
+++ b/wgpu/src/widget/canvas/frame.rs
@@ -262,13 +262,15 @@ impl Frame {
     ///
     /// [`Frame`]: struct.Frame.html
     pub fn into_primitive(mut self) -> Primitive {
-        self.primitives.push(Primitive::Mesh2D {
-            origin: Point::ORIGIN,
-            buffers: triangle::Mesh2D {
-                vertices: self.buffers.vertices,
-                indices: self.buffers.indices,
-            },
-        });
+        if !self.buffers.indices.is_empty() {
+            self.primitives.push(Primitive::Mesh2D {
+                origin: Point::ORIGIN,
+                buffers: triangle::Mesh2D {
+                    vertices: self.buffers.vertices,
+                    indices: self.buffers.indices,
+                },
+            });
+        }
 
         Primitive::Group {
             primitives: self.primitives,