ShaderFX/LibOverride: Add `BKE_shaderfx_is_nonlocal_in_liboverride` util.

Used to detect if a shaderfx is purely local, or comes from linked data,
in case of a liboverride.

Not actually used yet since we do not currently support adding
shaderfx's to overrides, but will be in the future, and matches
constraints and modifiers code.

1 files changed, 12 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/shader_fx.c b/source/blender/blenkernel/intern/shader_fx.c
index 3727ec866ca..60f0b744e59 100644
--- a/source/blender/blenkernel/intern/shader_fx.c
+++ b/source/blender/blenkernel/intern/shader_fx.c
@@ -165,6 +165,18 @@ const ShaderFxTypeInfo *BKE_shaderfx_get_info(ShaderFxType type)
 }
 
 /**
+ * Check whether given shaderfx is not local (i.e. from linked data) when the object is a library
+ * override.
+ *
+ * \param shaderfx: May be NULL, in which case we consider it as a non-local shaderfx case.
+ */
+bool BKE_shaderfx_is_nonlocal_in_liboverride(const Object *ob, const ShaderFxData *shaderfx)
+{
+  return (ID_IS_OVERRIDE_LIBRARY(ob) &&
+          ((shaderfx == NULL) || (shaderfx->flag & eShaderFxFlag_OverrideLibrary_Local) == 0));
+}
+
+/**
  * Get an effect's panel type, which was defined in the #panelRegister callback.
  *
  * \note ShaderFx panel types are assumed to be named with the struct name field concatenated to