Fix T78608: Memory leak in Material properties: "Data from SCE".

Caused by recent own refactor of cache presevation handling in readfile,
EEVEE's lightcache are weird birds that can also be saved in .blend
files, need a special handling for those 'persistent' caches...

6 files changed, 19 insertions, 9 deletions

diff --git a/source/blender/blenkernel/BKE_idtype.h b/source/blender/blenkernel/BKE_idtype.h
index 705ed18df90..6cbb7571f41 100644
--- a/source/blender/blenkernel/BKE_idtype.h
+++ b/source/blender/blenkernel/BKE_idtype.h
@@ -76,9 +76,15 @@ typedef void (*IDTypeMakeLocalFunction)(struct Main *bmain, struct ID *id, const
 
 typedef void (*IDTypeForeachIDFunction)(struct ID *id, struct LibraryForeachIDData *data);
 
+typedef enum eIDTypeInfoCacheCallbackFlags {
+  /** Indicates to the callback that that cache may be stored in the .blend file, so its pointer
+   * should not be cleared at readtime.*/
+  IDTYPE_CACHE_CB_FLAGS_PERSISTENT = 1 << 0,
+} eIDTypeInfoCacheCallbackFlags;
 typedef void (*IDTypeForeachCacheFunctionCallback)(struct ID *id,
                                                    const struct IDCacheKey *cache_key,
                                                    void **cache_p,
+                                                   uint flags,
                                                    void *user_data);
 typedef void (*IDTypeForeachCacheFunction)(struct ID *id,
                                            IDTypeForeachCacheFunctionCallback function_callback,
diff --git a/source/blender/blenkernel/intern/image.c b/source/blender/blenkernel/intern/image.c
index 41ef5dc00ef..53e7037218e 100644
--- a/source/blender/blenkernel/intern/image.c
+++ b/source/blender/blenkernel/intern/image.c
@@ -195,24 +195,24 @@ static void image_foreach_cache(ID *id,
       .offset_in_ID = offsetof(Image, cache),
       .cache_v = image->cache,
   };
-  function_callback(id, &key, (void **)&image->cache, user_data);
+  function_callback(id, &key, (void **)&image->cache, 0, user_data);
 
   for (int eye = 0; eye < 2; eye++) {
     for (int a = 0; a < TEXTARGET_COUNT; a++) {
       key.offset_in_ID = offsetof(Image, gputexture[a][eye]);
       key.cache_v = image->gputexture[a][eye];
-      function_callback(id, &key, (void **)&image->gputexture[a][eye], user_data);
+      function_callback(id, &key, (void **)&image->gputexture[a][eye], 0, user_data);
     }
   }
 
   key.offset_in_ID = offsetof(Image, rr);
   key.cache_v = image->rr;
-  function_callback(id, &key, (void **)&image->rr, user_data);
+  function_callback(id, &key, (void **)&image->rr, 0, user_data);
 
   LISTBASE_FOREACH (RenderSlot *, slot, &image->renderslots) {
     key.offset_in_ID = (size_t)BLI_ghashutil_strhash_p(slot->name);
     key.cache_v = slot->render;
-    function_callback(id, &key, (void **)&slot->render, user_data);
+    function_callback(id, &key, (void **)&slot->render, 0, user_data);
   }
 }
 
diff --git a/source/blender/blenkernel/intern/movieclip.c b/source/blender/blenkernel/intern/movieclip.c
index d36f5ed0329..4a65c6ff5e7 100644
--- a/source/blender/blenkernel/intern/movieclip.c
+++ b/source/blender/blenkernel/intern/movieclip.c
@@ -139,11 +139,11 @@ static void movie_clip_foreach_cache(ID *id,
       .offset_in_ID = offsetof(MovieClip, cache),
       .cache_v = movie_clip->cache,
   };
-  function_callback(id, &key, (void **)&movie_clip->cache, user_data);
+  function_callback(id, &key, (void **)&movie_clip->cache, 0, user_data);
 
   key.offset_in_ID = offsetof(MovieClip, tracking.camera.intrinsics);
   key.cache_v = movie_clip->tracking.camera.intrinsics;
-  function_callback(id, &key, (void **)&movie_clip->tracking.camera.intrinsics, user_data);
+  function_callback(id, &key, (void **)&movie_clip->tracking.camera.intrinsics, 0, user_data);
 }
 
 IDTypeInfo IDType_ID_MC = {
diff --git a/source/blender/blenkernel/intern/scene.c b/source/blender/blenkernel/intern/scene.c
index 7f3d6eb0372..a457d278e1d 100644
--- a/source/blender/blenkernel/intern/scene.c
+++ b/source/blender/blenkernel/intern/scene.c
@@ -581,7 +581,11 @@ static void scene_foreach_cache(ID *id,
       .cache_v = scene->eevee.light_cache_data,
   };
 
-  function_callback(id, &key, (void **)&scene->eevee.light_cache_data, user_data);
+  function_callback(id,
+                    &key,
+                    (void **)&scene->eevee.light_cache_data,
+                    IDTYPE_CACHE_CB_FLAGS_PERSISTENT,
+                    user_data);
 }
 
 IDTypeInfo IDType_ID_SCE = {
diff --git a/source/blender/blenkernel/intern/sound.c b/source/blender/blenkernel/intern/sound.c
index 18fd8a10cc1..1fcfc9b060f 100644
--- a/source/blender/blenkernel/intern/sound.c
+++ b/source/blender/blenkernel/intern/sound.c
@@ -123,7 +123,7 @@ static void sound_foreach_cache(ID *id,
       .cache_v = sound->waveform,
   };
 
-  function_callback(id, &key, &sound->waveform, user_data);
+  function_callback(id, &key, &sound->waveform, 0, user_data);
 }
 
 IDTypeInfo IDType_ID_SO = {
diff --git a/source/blender/blenkernel/intern/volume.cc b/source/blender/blenkernel/intern/volume.cc
index 18859869b4e..48b920c8a05 100644
--- a/source/blender/blenkernel/intern/volume.cc
+++ b/source/blender/blenkernel/intern/volume.cc
@@ -494,7 +494,7 @@ static void volume_foreach_cache(ID *id,
       /* cache_v */ volume->runtime.grids,
   };
 
-  function_callback(id, &key, (void **)&volume->runtime.grids, user_data);
+  function_callback(id, &key, (void **)&volume->runtime.grids, 0, user_data);
 }
 
 IDTypeInfo IDType_ID_VO = {