Sequencer display overlay option, this can show a border area from another time to help compare for color grading.

- Okey sets the border in the display.
- Okey resets the frame offset in the sequencer timeline.
- ghost icon in the header can enable/disable.
- frame offset can be relative or absolute (lock icon)

Not very happy that this commit adds a call to BKE_animsys_evaluate_animdata(scene, ...) in do_build_seq_array_recursively()
without this the offset frames dont have fcurves applied.
Though we will need something like this for prefetch frames to work too.

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/sequencer.c b/source/blender/blenkernel/intern/sequencer.c
index cfe2a6bb207..82ed85a1983 100644
--- a/source/blender/blenkernel/intern/sequencer.c
+++ b/source/blender/blenkernel/intern/sequencer.c
@@ -2544,6 +2544,10 @@ static TStripElem* do_build_seq_array_recursively(
 	int i;
 	TStripElem* se = 0;
 
+	// XXX for prefetch and overlay offset!..., very bad!!!
+	AnimData *adt= BKE_animdata_from_id(&scene->id);
+	BKE_animsys_evaluate_animdata(&scene->id, adt, cfra, ADT_RECALC_ANIM);
+
 	count = get_shown_sequences(seqbasep, cfra, chanshown, 
 					(Sequence **)&seq_arr);