UV: Pack to closest/active UDIM

Implements T78397
Extends the functionality of pack islands operator to allow packing UVs
to either the closest or active UDIM tile.
This provides 2 new options for packing UVs :

* Closest UDIM: Selected UVs will be packed to the UDIM tile they were
  placed on. If not present on a valid UDIM tile, the UVs will be packed
  to the closest UDIM in UV space
* Active UDIM: Selected UVs will be packed to the active UDIM image tile
  In case, no image is present in the UV editor, then UVs will be packed
  to the tile on the UDIM grid where the 2D cursor is located.

Reviewed By: campbellbarton

Maniphest Tasks: T78397

Ref D12680

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/editors/include/ED_uvedit.h b/source/blender/editors/include/ED_uvedit.h
index ea3d921f2c5..516239a7176 100644
--- a/source/blender/editors/include/ED_uvedit.h
+++ b/source/blender/editors/include/ED_uvedit.h
@@ -246,9 +246,14 @@ struct UVPackIsland_Params {
   uint use_seams : 1;
   uint correct_aspect : 1;
 };
+
+bool uv_coords_isect_udim(const struct Image *image, const int udim_grid[2], float coords[2]);
 void ED_uvedit_pack_islands_multi(const struct Scene *scene,
+                                  const struct SpaceImage *sima,
                                   Object **objects,
                                   const uint objects_len,
+                                  const bool use_target_udim,
+                                  int target_udim,
                                   const struct UVPackIsland_Params *params);
 
 #ifdef __cplusplus