UV: Add options for uv select similar in island mode

In island selection mode, add new options for uv select similar:

* Area UV
* Area 3D
* Face (number of faces in island)

See also https://developer.blender.org/T47437
Differential Revision: https://developer.blender.org/D15553

1 files changed, 23 insertions, 0 deletions

diff --git a/source/blender/editors/include/ED_uvedit.h b/source/blender/editors/include/ED_uvedit.h
index 80a75da27f8..24d6819536d 100644
--- a/source/blender/editors/include/ED_uvedit.h
+++ b/source/blender/editors/include/ED_uvedit.h
@@ -305,6 +305,29 @@ void ED_uvedit_buttons_register(struct ARegionType *art);
 
 /* uvedit_islands.c */
 
+struct FaceIsland {
+  struct FaceIsland *next;
+  struct FaceIsland *prev;
+  struct BMFace **faces;
+  int faces_len;
+  rctf bounds_rect;
+  /**
+   * \note While this is duplicate information,
+   * it allows islands from multiple meshes to be stored in the same list.
+   */
+  uint cd_loop_uv_offset;
+  float aspect_y;
+};
+
+int bm_mesh_calc_uv_islands(const Scene *scene,
+                            struct BMesh *bm,
+                            ListBase *island_list,
+                            const bool only_selected_faces,
+                            const bool only_selected_uvs,
+                            const bool use_seams,
+                            const float aspect_y,
+                            const uint cd_loop_uv_offset);
+
 struct UVMapUDIM_Params {
   const struct Image *image;
   /** Copied from #SpaceImage.tile_grid_shape */