From e5289fdce13daa517dcdab82eec38ac3200e4199 Mon Sep 17 00:00:00 2001
From: John McCutchan <john@johnmccutchan.com>
Date: Thu, 28 Mar 2024 18:45:16 -0700
Subject: [PATCH] Reland https://github.com/flutter/engine/pull/51391
 (flutter/engine#51764)

---
 .../embedding/engine/renderer/FlutterRenderer.java        | 8 ++++++++
 .../embedding/engine/renderer/FlutterRendererTest.java    | 5 +++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/engine/src/flutter/shell/platform/android/io/flutter/embedding/engine/renderer/FlutterRenderer.java b/engine/src/flutter/shell/platform/android/io/flutter/embedding/engine/renderer/FlutterRenderer.java
index 3f920cf126b..df0e5b556a0 100644
--- a/engine/src/flutter/shell/platform/android/io/flutter/embedding/engine/renderer/FlutterRenderer.java
+++ b/engine/src/flutter/shell/platform/android/io/flutter/embedding/engine/renderer/FlutterRenderer.java
@@ -414,6 +414,11 @@ public class FlutterRenderer implements TextureRegistry {
     // Flip when debugging to see verbose logs.
     private static final boolean VERBOSE_LOGS = false;
 
+    // If we cleanup the ImageReaders on memory pressure it breaks VirtualDisplay
+    // backed platform views. Disable for now as this is only necessary to work
+    // around a Samsung-specific Android 14 bug.
+    private static final boolean CLEANUP_ON_MEMORY_PRESSURE = false;
+
     private final long id;
 
     private boolean released;
@@ -649,6 +654,9 @@ public class FlutterRenderer implements TextureRegistry {
 
     @Override
     public void onTrimMemory(int level) {
+      if (!CLEANUP_ON_MEMORY_PRESSURE) {
+        return;
+      }
       cleanup();
       createNewReader = true;
     }
diff --git a/engine/src/flutter/shell/platform/android/test/io/flutter/embedding/engine/renderer/FlutterRendererTest.java b/engine/src/flutter/shell/platform/android/test/io/flutter/embedding/engine/renderer/FlutterRendererTest.java
index 50f83d5fb8e..bc36ed3075f 100644
--- a/engine/src/flutter/shell/platform/android/test/io/flutter/embedding/engine/renderer/FlutterRendererTest.java
+++ b/engine/src/flutter/shell/platform/android/test/io/flutter/embedding/engine/renderer/FlutterRendererTest.java
@@ -648,11 +648,12 @@ public class FlutterRendererTest {
     assertEquals(1, texture.numImages());
 
     // Invoke the onTrimMemory callback.
+    // This should do nothing.
     texture.onTrimMemory(0);
     shadowOf(Looper.getMainLooper()).idle();
 
-    assertEquals(0, texture.numImageReaders());
-    assertEquals(0, texture.numImages());
+    assertEquals(1, texture.numImageReaders());
+    assertEquals(1, texture.numImages());
   }
 
   // A 0x0 ImageReader is a runtime error.