From c16a9b11033dc8b97fe4ad37c278d16ce799c65a Mon Sep 17 00:00:00 2001
From: Martin Boonk <martin@boonk.info>
Date: Sun, 26 Feb 2023 15:23:41 +0100
Subject: [PATCH] messagesoverlay - Use less memory if messages are stacked

---
 apps/messagesoverlay/lib.js | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/apps/messagesoverlay/lib.js b/apps/messagesoverlay/lib.js
index 286e5e26f..6a4dd7e26 100644
--- a/apps/messagesoverlay/lib.js
+++ b/apps/messagesoverlay/lib.js
@@ -411,6 +411,7 @@ let cleanup = function(){
   if (touchHandler) Bangle.removeListener("touch", touchHandler);
   if (swipeHandler) Bangle.removeListener("swipe", swipeHandler);
   Bangle.setLCDOverlay();
+  ovr = undefined;
 };
 
 let backup = {};
@@ -447,12 +448,18 @@ let main = function(ovr, event) {
   }
 };
 
+let ovr;
+
 exports.pushMessage = function(event) {
   if( event.id=="music") return require_real("messages").pushMessage(event);
 
-  let ovr = Graphics.createArrayBuffer(ovrw, ovrh, 4, {
-    msb: true
-  });
+  if (!ovr) {
+    ovr = Graphics.createArrayBuffer(ovrw, ovrh, 4, {
+      msb: true
+    });
+  } else {
+    ovr.clear();
+  }
 
   let _g = g;
   g = ovr;