From 49df3116bc5884f58031fd4bb8653e27e4044c96 Mon Sep 17 00:00:00 2001
From: hunam <me@hunam.me>
Date: Fri, 3 Apr 2026 19:38:07 +0300
Subject: [PATCH] Backends: Metal: avoid redundant vertex buffer bind in
 SetupRenderState. (#9343)

---
 backends/imgui_impl_metal.mm | 4 ++--
 docs/CHANGELOG.txt           | 3 +++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/backends/imgui_impl_metal.mm b/backends/imgui_impl_metal.mm
index 0ab182a82..037782bf6 100644
--- a/backends/imgui_impl_metal.mm
+++ b/backends/imgui_impl_metal.mm
@@ -16,6 +16,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
+//  2026-04-03: Metal: avoid redundant vertex buffer bind in SetupRenderState. (#9343)
 //  2026-03-19: Fixed issue in ImGui_ImplMetal_RenderDrawData() if ImTextureID_Invalid is defined to be != 0, which became the default since 2026-03-12. (#9295, #9310)
 //  2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
 //  2025-06-11: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas. Removed ImGui_ImplMetal_CreateFontsTexture() and ImGui_ImplMetal_DestroyFontsTexture().
@@ -215,8 +216,7 @@ static void ImGui_ImplMetal_SetupRenderState(ImDrawData* draw_data, id<MTLComman
 
     [commandEncoder setRenderPipelineState:renderPipelineState];
 
-    [commandEncoder setVertexBuffer:vertexBuffer.buffer offset:0 atIndex:0];
-    [commandEncoder setVertexBufferOffset:vertexBufferOffset atIndex:0];
+    [commandEncoder setVertexBuffer:vertexBuffer.buffer offset:vertexBufferOffset atIndex:0];
 }
 
 // Metal Render function.
diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index 3043b3b28..ef5a44eec 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@@ -46,6 +46,9 @@ Other Changes:
 - InputText:
   - InputTextMultiline: fixed an issue processing deactivation logic when an active
     multi-line edit is clipped due to being out of view.
+- Backends:
+  - Metal: avoid redundant vertex buffer bind in SetupRenderState, which leads
+    to validation issue. (#9343) [@Hunam6]
 
 
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