From 39d964c4bb82d6dbb2c17256026eb6260e25d5d2 Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Tue, 23 Jan 2024 15:37:07 +0100
Subject: [PATCH] glgsg: Don't set immutable flag for buffer textures
 (regression)

Fixes #1602
---
 panda/src/glstuff/glGraphicsStateGuardian_src.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/panda/src/glstuff/glGraphicsStateGuardian_src.cxx b/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
index 1b66ee9895..38e7ed778f 100644
--- a/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
+++ b/panda/src/glstuff/glGraphicsStateGuardian_src.cxx
@@ -14070,7 +14070,8 @@ upload_texture(CLP(TextureContext) *gtc, bool force, bool uses_mipmaps) {
         << "Attempt to modify texture with immutable storage, recreating texture.\n";
       gtc->reset_data(gtc->_target, num_views);
     }
-    else if (_supports_tex_storage && gl_immutable_texture_storage) {
+    else if (_supports_tex_storage && gl_immutable_texture_storage &&
+             texture_type != Texture::TT_buffer_texture) {
       gtc->_immutable = true;
     }
   }