1 files changed, 11 insertions, 0 deletions
diff --git a/source/blender/draw/intern/draw_view_data.h b/source/blender/draw/intern/draw_view_data.h
index c8176170a61..494c28cc067 100644
--- a/source/blender/draw/intern/draw_view_data.h
+++ b/source/blender/draw/intern/draw_view_data.h
@@ -63,6 +63,12 @@ typedef struct ViewportEngineData {
   TextureList *txl;
   PassList *psl;
   StorageList *stl;
+  /**
+   * \brief Memory block that can be freely used by the draw engine.
+   * When used the draw engine must implement #DrawEngineType.instance_free callback.
+   */
+  void *instance_data;
+
   char info[GPU_INFO_SIZE];
 
   /* we may want to put this elsewhere */
@@ -100,6 +106,11 @@ typedef struct DefaultTextureList {
 
 typedef struct DRWViewData DRWViewData;
 
+/**
+ * Creates a view data with all possible engines type for this view.
+ *
+ * `engine_types` contains #DRWRegisteredDrawEngine.
+ */
 DRWViewData *DRW_view_data_create(ListBase *engine_types);
 void DRW_view_data_free(DRWViewData *view_data);