Fix T51845

3 files changed, 10 insertions, 1 deletions

diff --git a/source/blender/blenlib/BLI_rect.h b/source/blender/blenlib/BLI_rect.h
index 041679ef876..21b9c75ac35 100644
--- a/source/blender/blenlib/BLI_rect.h
+++ b/source/blender/blenlib/BLI_rect.h
@@ -97,6 +97,7 @@ void BLI_rctf_union(struct rctf *rctf1, const struct rctf *rctf2);
 void BLI_rcti_rctf_copy(struct rcti *dst, const struct rctf *src);
 void BLI_rctf_rcti_copy(struct rctf *dst, const struct rcti *src);
 void BLI_rcti_rctf_copy_floor(struct rcti *dst, const struct rctf *src);
+void BLI_rcti_rctf_copy_round(struct rcti *dst, const struct rctf *src);
 
 void BLI_rctf_rotate_expand(rctf *dst, const rctf *src, const float angle);
 
diff --git a/source/blender/blenlib/intern/rct.c b/source/blender/blenlib/intern/rct.c
index fd24a00156d..e0c4cbe9990 100644
--- a/source/blender/blenlib/intern/rct.c
+++ b/source/blender/blenlib/intern/rct.c
@@ -693,6 +693,14 @@ void BLI_rcti_rctf_copy_floor(rcti *dst, const rctf *src)
 	dst->ymax = floorf(src->ymax);
 }
 
+void BLI_rcti_rctf_copy_round(rcti *dst, const rctf *src)
+{
+	dst->xmin = floorf(src->xmin + 0.5f);
+	dst->xmax = floorf(src->xmax + 0.5f);
+	dst->ymin = floorf(src->ymin + 0.5f);
+	dst->ymax = floorf(src->ymax + 0.5f);
+}
+
 void BLI_rctf_rcti_copy(rctf *dst, const rcti *src)
 {
 	dst->xmin = src->xmin;
diff --git a/source/blender/editors/interface/interface.c b/source/blender/editors/interface/interface.c
index 64b26406f84..2ebdf6d214e 100644
--- a/source/blender/editors/interface/interface.c
+++ b/source/blender/editors/interface/interface.c
@@ -1337,7 +1337,7 @@ static void ui_but_to_pixelrect(rcti *rect, const ARegion *ar, uiBlock *block, u
 	rctf rectf;
 
 	ui_block_to_window_rctf(ar, block, &rectf, (but) ? &but->rect : &block->rect);
-	BLI_rcti_rctf_copy(rect, &rectf);
+	BLI_rcti_rctf_copy_round(rect, &rectf);
 	BLI_rcti_translate(rect, -ar->winrct.xmin, -ar->winrct.ymin);
 }