From 12f051bf5638aa75736af4c1d1994fd35c015196 Mon Sep 17 00:00:00 2001
From: artemp <artem@mapnik.org>
Date: Tue, 9 Dec 2014 11:47:47 +0100
Subject: [PATCH] image_data - fix setRow implementation

---
 include/mapnik/image_data.hpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/mapnik/image_data.hpp b/include/mapnik/image_data.hpp
index d2bdc02b8..1b6a09e90 100644
--- a/include/mapnik/image_data.hpp
+++ b/include/mapnik/image_data.hpp
@@ -188,7 +188,9 @@ public:
     }
     inline void setRow(std::size_t row, std::size_t x0, std::size_t x1, pixel_type const* buf)
     {
-        std::copy(buf, buf + (x1 - x0), pData_ + row * width_);
+        assert(row < height_);
+        assert ((x1 - x0) <= width_ );
+        std::copy(buf, buf + (x1 - x0), pData_ + row * width_ + x0);
     }
 private:
     std::size_t width_;