From b8011150a5fbb2aec8c3c01173c1004246c7bc6c Mon Sep 17 00:00:00 2001
From: niu2x <niu2x@icloud.com>
Date: Sat, 22 Jan 2022 23:16:07 +0800
Subject: [PATCH] bugfix: memory leak

we should release old vertex buffer.
---
 cocos/renderer/backend/opengl/CommandBufferGL.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/cocos/renderer/backend/opengl/CommandBufferGL.cpp b/cocos/renderer/backend/opengl/CommandBufferGL.cpp
index e7ecfe05f9c4..f5065df5d02e 100644
--- a/cocos/renderer/backend/opengl/CommandBufferGL.cpp
+++ b/cocos/renderer/backend/opengl/CommandBufferGL.cpp
@@ -330,7 +330,7 @@ void CommandBufferGL::setWinding(Winding winding)
 void CommandBufferGL::setIndexBuffer(Buffer* buffer)
 {
     assert(buffer != nullptr);
-    if (buffer == nullptr)
+    if (buffer == nullptr || _indexBuffer == buffer)
         return;
     
     buffer->retain();
@@ -345,6 +345,7 @@ void CommandBufferGL::setVertexBuffer(Buffer* buffer)
         return;
     
     buffer->retain();
+    CC_SAFE_RELEASE(_vertexBuffer);
     _vertexBuffer = static_cast<BufferGL*>(buffer);
 }