Fix T74875: Preview shows previously cached frame after Hard Cut

Add method to invalidate strip cache in range of non-overlapping strip.
Invalidate original strip in range of new strip created by cutting.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D7313

1 files changed, 9 insertions, 6 deletions

diff --git a/source/blender/blenkernel/intern/seqcache.c b/source/blender/blenkernel/intern/seqcache.c
index 12c5821e858..f999a98faac 100644
--- a/source/blender/blenkernel/intern/seqcache.c
+++ b/source/blender/blenkernel/intern/seqcache.c
@@ -1153,7 +1153,8 @@ void BKE_sequencer_cache_cleanup(Scene *scene)
 void BKE_sequencer_cache_cleanup_sequence(Scene *scene,
                                           Sequence *seq,
                                           Sequence *seq_changed,
-                                          int invalidate_types)
+                                          int invalidate_types,
+                                          bool force_seq_changed_range)
 {
   SeqCache *cache = seq_cache_get_from_scene(scene);
   if (!cache) {
@@ -1169,12 +1170,14 @@ void BKE_sequencer_cache_cleanup_sequence(Scene *scene,
   int range_start = seq_changed->startdisp;
   int range_end = seq_changed->enddisp;
 
-  if (seq->startdisp > range_start) {
-    range_start = seq->startdisp;
-  }
+  if (!force_seq_changed_range) {
+    if (seq->startdisp > range_start) {
+      range_start = seq->startdisp;
+    }
 
-  if (seq->enddisp < range_end) {
-    range_end = seq->enddisp;
+    if (seq->enddisp < range_end) {
+      range_end = seq->enddisp;
+    }
   }
 
   int invalidate_composite = invalidate_types & SEQ_CACHE_STORE_FINAL_OUT;