From b6117386b9683ecebd810fdc1e574e79b91f3894 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Foucault?= <foucault.clem@gmail.com>
Date: Sat, 27 Aug 2022 15:49:50 +0200
Subject: Fix backfacing lingering state

---
 source/blender/draw/intern/draw_command.hh | 23 +++++++++++++++++++----
 source/blender/draw/intern/draw_manager.cc |  9 +++------
 2 files changed, 22 insertions(+), 10 deletions(-)

diff --git a/source/blender/draw/intern/draw_command.hh b/source/blender/draw/intern/draw_command.hh
index 88a934c1a50..b368a463828 100644
--- a/source/blender/draw/intern/draw_command.hh
+++ b/source/blender/draw/intern/draw_command.hh
@@ -9,6 +9,7 @@
  * Passes record draw commands.
  */
 
+#include "BKE_global.h"
 #include "BLI_map.hh"
 #include "DRW_gpu_wrapper.hh"
 
@@ -39,13 +40,27 @@ struct RecordingState {
   /** Used for gl_BaseInstance workaround. */
   GPUStorageBuf *resource_id_buf = nullptr;
 
-  void front_facing_set(bool front_facing)
+  void front_facing_set(bool facing)
   {
     /* Facing is inverted if view is not in expected handedness. */
-    front_facing = this->inverted_view == front_facing;
+    facing = this->inverted_view == facing;
     /* Remove redundant changes. */
-    if (assign_if_different(this->front_facing, front_facing)) {
-      GPU_front_facing(!front_facing);
+    if (assign_if_different(this->front_facing, facing)) {
+      GPU_front_facing(!facing);
+    }
+  }
+
+  void cleanup()
+  {
+    if (front_facing == false) {
+      GPU_front_facing(false);
+    }
+
+    if (G.debug & G_DEBUG_GPU) {
+      GPU_storagebuf_unbind_all();
+      GPU_texture_image_unbind_all();
+      GPU_texture_unbind_all();
+      GPU_uniformbuf_unbind_all();
     }
   }
 };
diff --git a/source/blender/draw/intern/draw_manager.cc b/source/blender/draw/intern/draw_manager.cc
index f48f56b80d3..b9a24d5a9fa 100644
--- a/source/blender/draw/intern/draw_manager.cc
+++ b/source/blender/draw/intern/draw_manager.cc
@@ -102,6 +102,8 @@ void Manager::submit(PassSimple &pass, View &view)
   // GPU_storagebuf_bind(attribute_buf, DRW_OBJ_ATTR_SLOT); /* TODO */
 
   pass.submit(state);
+
+  state.cleanup();
 }
 
 void Manager::submit(PassMain &pass, View &view)
@@ -122,12 +124,7 @@ void Manager::submit(PassMain &pass, View &view)
 
   pass.submit(state);
 
-  if (G.debug & G_DEBUG_GPU) {
-    GPU_storagebuf_unbind_all();
-    GPU_texture_image_unbind_all();
-    GPU_texture_unbind_all();
-    GPU_uniformbuf_unbind_all();
-  }
+  state.cleanup();
 }
 
 Manager::SubmitDebugOutput Manager::submit_debug(PassSimple &pass, View &view)
-- 
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