From 0e20dc802ccc1b79cff11163b4817515feec6d5d Mon Sep 17 00:00:00 2001
From: Ferhat <ferhat@gmail.com>
Date: Tue, 25 Feb 2020 13:38:25 -0800
Subject: [PATCH] Evict BitmapCanvas(s) from cache when canvas allocation fails
 (flutter/engine#16793)

---
 .../flutter/lib/web_ui/lib/src/engine/canvas_pool.dart    | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/engine/src/flutter/lib/web_ui/lib/src/engine/canvas_pool.dart b/engine/src/flutter/lib/web_ui/lib/src/engine/canvas_pool.dart
index 1d3a289ebe9..fefcf14b13b 100644
--- a/engine/src/flutter/lib/web_ui/lib/src/engine/canvas_pool.dart
+++ b/engine/src/flutter/lib/web_ui/lib/src/engine/canvas_pool.dart
@@ -95,6 +95,14 @@ class _CanvasPool extends _SaveStackTracking {
         width: _widthInBitmapPixels,
         height: _heightInBitmapPixels,
       );
+      if (_canvas == null) {
+        // Evict BitmapCanvas(s) and retry.
+        _reduceCanvasMemoryUsage();
+        _canvas = html.CanvasElement(
+          width: _widthInBitmapPixels,
+          height: _heightInBitmapPixels,
+        );
+      }
       _canvas.style
         ..position = 'absolute'
         ..width = '${cssWidth}px'