From c4eaac6d4856d4136b31f7db6e3974c6d846db4d Mon Sep 17 00:00:00 2001
From: ocornut <omar@miracleworld.net>
Date: Tue, 2 Jun 2026 19:04:14 +0200
Subject: [PATCH] Fonts: fixed an issue where passing a manually created
 ImFontAtlas to CreateContext() would incorrectly destroy it in
 DestroyContext() when ref-count gets back to zero. (#9426)

# Conflicts:
#	docs/CHANGELOG.txt
---
 docs/CHANGELOG.txt | 2 ++
 imgui.cpp          | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index 9c3c8e68b..4f8cf7054 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@@ -60,6 +60,8 @@ Other Changes:
     disable embedding either fonts separately. (#9407)
   - Tweak `CalcTextSize()` awkward width rounding/ceiling code to reduce floating-point
     imprecisions altering the result by 1 even at relatively small width. (#791)
+  - Fixed an issue where passing a manually created ImFontAtlas to CreateContext() would
+    incorrectly destroy it in DestroyContext() when ref-count gets back to zero. (#9426)
 - DrawList:
   - Minor optimization to `AddLine()`, `AddLineH()`, `AddLineV()` functions. (#4091)
   - Added `ImDrawListFlags_TextNoPixelSnap` to disable snapping of AddText()
diff --git a/imgui.cpp b/imgui.cpp
index c56e9eff1..516bd9dec 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -4476,7 +4476,7 @@ void ImGui::Shutdown()
     for (ImFontAtlas* atlas : g.FontAtlases)
     {
         UnregisterFontAtlas(atlas);
-        if (atlas->RefCount == 0)
+        if (atlas->RefCount == 0 && atlas->OwnerContext == &g)
         {
             atlas->Locked = false;
             IM_DELETE(atlas);