Treat rectangular clip paths as a special case using scissoring rectangles.

1 files changed, 15 insertions, 0 deletions

diff --git a/draw/pathscan.c b/draw/pathscan.c
index 35cf2d39..ebf9502a 100644
--- a/draw/pathscan.c
+++ b/draw/pathscan.c
@@ -222,6 +222,21 @@ fz_sortgel(fz_gel *gel)
 	}
 }
 
+int
+fz_isrectgel(fz_gel *gel)
+{
+	/* a rectangular path is converted into two vertical edges of identical height */
+	if (gel->len == 2)
+	{
+		fz_edge *a = gel->edges + 0;
+		fz_edge *b = gel->edges + 1;
+		return a->y == b->y && a->h == b->h &&
+			a->xmove == 0 && a->adjup == 0 &&
+			b->xmove == 0 && b->adjup == 0;
+	}
+	return 0;
+}
+
 /*
  * Active Edge List -- keep track of active edges while sweeping
  */