1 files changed, 16 insertions, 0 deletions
diff --git a/gm/aaa.cpp b/gm/aaa.cpp
index 614ff84258..4f81fc9a2c 100644
--- a/gm/aaa.cpp
+++ b/gm/aaa.cpp
@@ -123,6 +123,22 @@ protected:
         p.setStrokeWidth(5);
         canvas->drawPath(path, p);
         canvas->restore();
+
+
+        // The following two paths test if we correctly cumulates the alpha on the middle pixel
+        // column where the left rect and the right rect abut.
+        p.setStyle(SkPaint::kFill_Style);
+        canvas->translate(0, 300);
+        path.reset();
+        path.addRect({20, 20, 100.4999f, 100});
+        path.addRect({100.5001f, 20, 200, 100});
+        canvas->drawPath(path, p);
+
+        canvas->translate(300, 0);
+        path.reset();
+        path.addRect({20, 20, 100.1f, 100});
+        path.addRect({100.9f, 20, 200, 100});
+        canvas->drawPath(path, p);
     }
 
 private: