From 7518a146c2fd407709752bb68aadd433194cb9aa Mon Sep 17 00:00:00 2001
From: Yegor <yjbanov@google.com>
Date: Fri, 26 Jun 2020 13:33:02 -0700
Subject: [PATCH] Do not call Picture.toImage on web during shader warm-up
 (#60379)

---
 packages/flutter/lib/src/painting/shader_warm_up.dart | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/flutter/lib/src/painting/shader_warm_up.dart b/packages/flutter/lib/src/painting/shader_warm_up.dart
index 7a31cd40530..681d28ae191 100644
--- a/packages/flutter/lib/src/painting/shader_warm_up.dart
+++ b/packages/flutter/lib/src/painting/shader_warm_up.dart
@@ -91,7 +91,10 @@ abstract class ShaderWarmUp {
     final ui.Picture picture = recorder.endRecording();
     final TimelineTask shaderWarmUpTask = TimelineTask();
     shaderWarmUpTask.start('Warm-up shader');
-    await picture.toImage(size.width.ceil(), size.height.ceil());
+    // Picture.toImage is not yet implemented on the web.
+    if (!kIsWeb) {
+      await picture.toImage(size.width.ceil(), size.height.ceil());
+    }
     shaderWarmUpTask.finish();
   }
 }