Patch to cure recursion by aborting if the co-ordinates are to big to handle (jburgess)

2009-03-31 19:50:55 +00:00 · 2009-03-31 19:50:55 +00:00 · 946fa51f4f
commit 946fa51f4f
parent 1a03c2d655
1 changed files with 6 additions and 0 deletions
--- a/agg/include/agg_rasterizer_cells_aa.h
+++ b/agg/include/agg_rasterizer_cells_aa.h
@ -323,6 +323,12 @@ namespace agg
        {
            int cx = (x1 + x2) >> 1;
            int cy = (y1 + y2) >> 1;
+
+            // Bail if values are so large they are likely to wrap
+            if ((abs(x1) >= INT_MAX/2) || (abs(y1) >= INT_MAX/2) ||
+                (abs(x2) >= INT_MAX/2) || (abs(y2) >= INT_MAX/2))
+                    return;
+
            line(x1, y1, cx, cy);
            line(cx, cy, x2, y2);
        }