Compensate for floating point imprecision in roundrect.

1 files changed, 4 insertions, 4 deletions

diff --git a/fitz/base_geometry.c b/fitz/base_geometry.c
index 375de12d..311221e0 100644
--- a/fitz/base_geometry.c
+++ b/fitz/base_geometry.c
@@ -143,10 +143,10 @@ fz_bbox
 fz_roundrect(fz_rect f)
 {
 	fz_bbox i;
-	i.x0 = floorf(f.x0);
-	i.y0 = floorf(f.y0);
-	i.x1 = ceilf(f.x1);
-	i.y1 = ceilf(f.y1);
+	i.x0 = floorf(f.x0 + 0.001f); /* adjust by 0.001 to compensate for precision errors */
+	i.y0 = floorf(f.y0 + 0.001f);
+	i.x1 = ceilf(f.x1 - 0.001f);
+	i.y1 = ceilf(f.y1 - 0.001f);
 	return i;
 }