VSE: Add frame selected operator for preview

This operator moves the view to show the selected visible strips.

Reviewed By: ISS

Differential Revision: https://developer.blender.org/D14222

2 files changed, 31 insertions, 0 deletions

diff --git a/source/blender/sequencer/SEQ_transform.h b/source/blender/sequencer/SEQ_transform.h
index eb910a5a5d1..a342dfe10a2 100644
--- a/source/blender/sequencer/SEQ_transform.h
+++ b/source/blender/sequencer/SEQ_transform.h
@@ -119,6 +119,22 @@ void SEQ_image_preview_unit_from_px(const struct Scene *scene,
                                     const float co_src[2],
                                     float co_dst[2]);
 
+/**
+ * Get viewport axis aligned bounding box from a collection of sequences.
+ * The collection must have one or more strips
+ *
+ * \param scene: Scene in which strips are located
+ * \param strips: Collection of strips to get the bounding box from
+ * \param apply_rotation: Include sequence rotation transform in the bounding box calculation
+ * \param r_min: Minimum x and y values
+ * \param r_max: Maximum x and y values
+ */
+void SEQ_image_transform_bounding_box_from_collection(struct Scene *scene,
+                                                      struct SeqCollection *strips,
+                                                      bool apply_rotation,
+                                                      float r_min[2],
+                                                      float r_max[2]);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/blender/sequencer/intern/strip_transform.c b/source/blender/sequencer/intern/strip_transform.c
index 087e2610bd6..e614dfa9b82 100644
--- a/source/blender/sequencer/intern/strip_transform.c
+++ b/source/blender/sequencer/intern/strip_transform.c
@@ -517,3 +517,18 @@ void SEQ_image_preview_unit_from_px(const Scene *scene, const float co_src[2], f
   co_dst[0] = co_src[0] / scene->r.xsch;
   co_dst[1] = co_src[1] / scene->r.ysch;
 }
+
+void SEQ_image_transform_bounding_box_from_collection(
+    Scene *scene, SeqCollection *strips, bool apply_rotation, float r_min[2], float r_max[2])
+{
+  Sequence *seq;
+
+  INIT_MINMAX2(r_min, r_max);
+  SEQ_ITERATOR_FOREACH (seq, strips) {
+    float quad[4][2];
+    SEQ_image_transform_quad_get(scene, seq, apply_rotation, quad);
+    for (int i = 0; i < 4; i++) {
+      minmax_v2v2_v2(r_min, r_max, quad[i]);
+    }
+  }
+}