add a flag field to RegionSpaceClip

- this field is to specify main clip or secondary clip, used in drawing
  code

2 files changed, 12 insertions, 1 deletions

diff --git a/source/blender/editors/space_clip/clip_editor.c b/source/blender/editors/space_clip/clip_editor.c
index 580b6f65da9..f5b65d41286 100644
--- a/source/blender/editors/space_clip/clip_editor.c
+++ b/source/blender/editors/space_clip/clip_editor.c
@@ -758,8 +758,14 @@ void ED_clip_update_correspondence_mode(bContext *C, SpaceClip *sc)
 		ScrArea *sa = CTX_wm_area(C);
 
 		ar->alignment = RGN_ALIGN_VSPLIT;
+		RegionSpaceClip *rsc = ar->regiondata;
+		rsc->flag = RSC_MAIN_CLIP;
 
+		/* set the region type to RSC_SECONDARY_CLIP so that
+		 * clip_main_region_draw is aware of this */
 		ARegion *newar = BKE_area_region_copy(sa->type, ar);
+		RegionSpaceClip *new_rsc = newar->regiondata;
+		new_rsc->flag = RSC_SECONDARY_CLIP;
 		BLI_addtail(&sa->regionbase, newar);
 
 		/* update split view */
diff --git a/source/blender/editors/space_clip/space_clip.c b/source/blender/editors/space_clip/space_clip.c
index fa2a36d0f6a..27925faa3ed 100644
--- a/source/blender/editors/space_clip/space_clip.c
+++ b/source/blender/editors/space_clip/space_clip.c
@@ -306,6 +306,7 @@ static SpaceLink *clip_new(const bContext *C)
 	/* region data for main region */
 	RegionSpaceClip *rsc = MEM_callocN(sizeof(RegionSpaceClip), "region data for clip");
 	rsc->zoom = 1.0f;
+	rsc->flag = RSC_MAIN_CLIP;
 	ar->regiondata = rsc;
 
 	return (SpaceLink *) sc;
@@ -1254,7 +1255,11 @@ static void clip_main_region_draw(const bContext *C, ARegion *ar)
 	/* data... */
 	movieclip_main_area_set_view2d(C, ar);
 
-	clip_draw_main(C, sc, ar);
+	if (rsc->flag == RSC_MAIN_CLIP)
+		clip_draw_main(C, sc, ar);
+	else {		// rsc->flag = RSC_SECONDARY_CLIP
+		clip_draw_secondary_clip(C, sc, ar);
+	}
 
 	/* TODO(sergey): would be nice to find a way to de-duplicate all this space conversions */
 	UI_view2d_view_to_region_fl(&ar->v2d, 0.0f, 0.0f, &x, &y);