From c799146cc92ad6f59b34b3a88d6209047e9ce074 Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Mon, 24 Oct 2022 13:11:27 +0200
Subject: [PATCH] glgsg: Fix stencil renderbuffer not being unbound when
 binding depth tex

Fixes part of #1364
---
 panda/src/glstuff/glGraphicsBuffer_src.cxx | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/panda/src/glstuff/glGraphicsBuffer_src.cxx b/panda/src/glstuff/glGraphicsBuffer_src.cxx
index 983e7cef23..957f40772a 100644
--- a/panda/src/glstuff/glGraphicsBuffer_src.cxx
+++ b/panda/src/glstuff/glGraphicsBuffer_src.cxx
@@ -788,6 +788,13 @@ bind_slot(int layer, bool rb_resize, Texture **attach, RenderTexturePlane slot,
         GLCAT.debug() << "Binding texture " << *tex << " to depth attachment.\n";
       }
 
+      if (slot != RTP_depth_stencil && _rb[RTP_depth_stencil] != 0) {
+        // We have a depth-stencil renderbuffer bound, delete it first.
+        // This will automatically unbind it as well.
+        glgsg->_glDeleteRenderbuffers(1, &(_rb[RTP_depth_stencil]));
+        _rb[RTP_depth_stencil] = 0;
+      }
+
       attach_tex(layer, 0, tex, GL_DEPTH_ATTACHMENT_EXT);
 
 #ifndef OPENGLES