From e269fe9b62af6fe314cebe0ee7a6d6d1a4a84d1c Mon Sep 17 00:00:00 2001

From: Tom Hughes <tom@compton.nu>

Date: Sun, 19 May 2013 11:03:26 +0100

Subject: [PATCH 02/15] Cure recursion by aborting if the co-ordinates are to

 big to handle

---

 include/agg_rasterizer_cells_aa.h | 9 ++++++++-

 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/agg_rasterizer_cells_aa.h b/include/agg_rasterizer_cells_aa.h

index d3bb138..3a616d9 100644

--- a/include/agg_rasterizer_cells_aa.h

+++ b/include/agg_rasterizer_cells_aa.h

@@ -40,7 +40,8 @@

 #define AGG_RASTERIZER_CELLS_AA_INCLUDED

 #include <string.h>

-#include <math.h>

+#include <cstdlib>

+#include <limits>

 #include "agg_math.h"

 #include "agg_array.h"

@@ -333,6 +334,12 @@ namespace agg

         {

             int cx = (x1 + x2) >> 1;

             int cy = (y1 + y2) >> 1;

+

+            // Bail if values are so large they are likely to wrap

+            if ((std::abs(x1) >= std::numeric_limits<int>::max()/2) || (std::abs(y1) >= std::numeric_limits<int>::max()/2) ||

+                (std::abs(x2) >= std::numeric_limits<int>::max()/2) || (std::abs(y2) >= std::numeric_limits<int>::max()/2))

+                    return;

+

             line(x1, y1, cx, cy);

             line(cx, cy, x2, y2);

         }

-- 

1.8.1.4