Masking support for motion tracks

Added option to use Grease Pencil datablock as a mask for pattern
when doing motion tracking. Option could be found in Tracking Settings
panel.

All strokes would be rasterized separately from each other and every
stroke is treating as a closed spline.

Also added option to apply a mask on track preview which is situated
just after B/B/W channel button under track preview.

1 files changed, 4 insertions, 3 deletions

diff --git a/source/blender/blenkernel/BKE_tracking.h b/source/blender/blenkernel/BKE_tracking.h
index 716b65408e1..11013d54951 100644
--- a/source/blender/blenkernel/BKE_tracking.h
+++ b/source/blender/blenkernel/BKE_tracking.h
@@ -72,14 +72,15 @@ void BKE_tracking_join_tracks(struct MovieTrackingTrack *dst_track, struct Movie
 void BKE_tracking_free(struct MovieTracking *tracking);
 
 struct ImBuf *BKE_tracking_sample_pattern_imbuf(int frame_width, int frame_height,
-                                                struct ImBuf *struct_ibuf, struct MovieTrackingMarker *marker,
+                                                struct ImBuf *struct_ibuf, struct MovieTrackingTrack *track,
+                                                struct MovieTrackingMarker *marker, int use_mask,
                                                 int num_samples_x, int num_samples_y, float pos[2]);
 struct ImBuf *BKE_tracking_get_pattern_imbuf(struct ImBuf *ibuf, struct MovieTrackingTrack *track,
                                              struct MovieTrackingMarker *marker, int anchored, int disable_channels);
 struct ImBuf *BKE_tracking_get_search_imbuf(struct ImBuf *ibuf, struct MovieTrackingTrack *track,
                                             struct MovieTrackingMarker *marker, int anchored, int disable_channels);
-struct ImBuf *BKE_tracking_track_mask_get(struct MovieTracking *tracking, struct MovieTrackingTrack *track,
-                                          struct MovieTrackingMarker *marker, int width, int height);
+float *BKE_tracking_track_mask_get(int frame_width, int frame_height, struct MovieTrackingTrack *track,
+                                   struct MovieTrackingMarker *marker);
 
 void BKE_track_unique_name(struct ListBase *tracksbase, struct MovieTrackingTrack *track);