GPU: Ensure rendering operations occur within GPU render boundaries.

This is required by the Metal backend to perform flushing of temporary objective-C resources. This is implemented as a global autoreleasepool, and is to ensure consistency such that all rendering operations, whether called via events, or via main loop will be within an autoreleasepool.

Authored by Apple: Michael Parkin-White

Ref T96261

Reviewed By: fclem

Differential Revision: https://developer.blender.org/D15900

2 files changed, 7 insertions, 0 deletions

diff --git a/source/blender/draw/engines/eevee/eevee_lightcache.c b/source/blender/draw/engines/eevee/eevee_lightcache.c
index 0fd87ef43f0..f9d3d74ffc7 100644
--- a/source/blender/draw/engines/eevee/eevee_lightcache.c
+++ b/source/blender/draw/engines/eevee/eevee_lightcache.c
@@ -591,6 +591,7 @@ static void eevee_lightbake_context_enable(EEVEE_LightBake *lbake)
   if (GPU_use_main_context_workaround() && !BLI_thread_is_main()) {
     GPU_context_main_lock();
     DRW_opengl_context_enable();
+    GPU_render_begin();
     return;
   }
 
@@ -604,10 +605,12 @@ static void eevee_lightbake_context_enable(EEVEE_LightBake *lbake)
   else {
     DRW_opengl_context_enable();
   }
+  GPU_render_begin();
 }
 
 static void eevee_lightbake_context_disable(EEVEE_LightBake *lbake)
 {
+  GPU_render_end();
   if (GPU_use_main_context_workaround() && !BLI_thread_is_main()) {
     DRW_opengl_context_disable();
     GPU_context_main_unlock();
diff --git a/source/blender/draw/engines/workbench/workbench_engine.c b/source/blender/draw/engines/workbench/workbench_engine.c
index a0459a967f3..ee9521289d9 100644
--- a/source/blender/draw/engines/workbench/workbench_engine.c
+++ b/source/blender/draw/engines/workbench/workbench_engine.c
@@ -29,6 +29,8 @@
 
 #include "ED_paint.h"
 
+#include "GPU_context.h"
+
 #include "workbench_engine.h"
 #include "workbench_private.h"
 
@@ -36,6 +38,7 @@
 
 void workbench_engine_init(void *ved)
 {
+  GPU_render_begin();
   WORKBENCH_Data *vedata = ved;
   WORKBENCH_StorageList *stl = vedata->stl;
   WORKBENCH_TextureList *txl = vedata->txl;
@@ -64,6 +67,7 @@ void workbench_engine_init(void *ved)
   workbench_dof_engine_init(vedata);
   workbench_antialiasing_engine_init(vedata);
   workbench_volume_engine_init(vedata);
+  GPU_render_end();
 }
 
 void workbench_cache_init(void *ved)