GPencil: Add link and copy functions for shaderfx

Adds two functions: one to copy a shaderfx between two gpencil objects,
and another to link all shaderfx between two gpencil objects. Added in
preparation for outliner shaderfx drag and drop.

Differential Revision: https://developer.blender.org/D8642

1 files changed, 21 insertions, 0 deletions

diff --git a/source/blender/editors/object/object_shader_fx.c b/source/blender/editors/object/object_shader_fx.c
index e2a30c4ce98..2dbde095e39 100644
--- a/source/blender/editors/object/object_shader_fx.c
+++ b/source/blender/editors/object/object_shader_fx.c
@@ -34,6 +34,7 @@
 #include "DNA_shader_fx_types.h"
 
 #include "BLI_listbase.h"
+#include "BLI_string.h"
 #include "BLI_string_utf8.h"
 #include "BLI_utildefines.h"
 
@@ -237,6 +238,26 @@ bool ED_object_shaderfx_move_to_index(ReportList *reports,
   return true;
 }
 
+void ED_object_shaderfx_link(Object *dst, Object *src)
+{
+  BLI_freelistN(&dst->shader_fx);
+  BKE_shaderfx_copy(&dst->shader_fx, &src->shader_fx);
+
+  DEG_id_tag_update(&dst->id, ID_RECALC_GEOMETRY);
+  WM_main_add_notifier(NC_OBJECT | ND_SHADERFX, dst);
+}
+
+void ED_object_shaderfx_copy(Object *dst, ShaderFxData *fx)
+{
+  ShaderFxData *nfx = BKE_shaderfx_new(fx->type);
+  BLI_strncpy(nfx->name, fx->name, sizeof(nfx->name));
+  BKE_shaderfx_copydata(fx, nfx);
+  BLI_addtail(&dst->shader_fx, nfx);
+
+  DEG_id_tag_update(&dst->id, ID_RECALC_GEOMETRY);
+  WM_main_add_notifier(NC_OBJECT | ND_SHADERFX, dst);
+}
+
 /************************ add effect operator *********************/
 
 static int shaderfx_add_exec(bContext *C, wmOperator *op)