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40 lines
1.3 KiB
Diff
40 lines
1.3 KiB
Diff
From e269fe9b62af6fe314cebe0ee7a6d6d1a4a84d1c Mon Sep 17 00:00:00 2001
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From: Tom Hughes <tom@compton.nu>
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Date: Sun, 19 May 2013 11:03:26 +0100
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Subject: [PATCH 02/15] Cure recursion by aborting if the co-ordinates are to
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big to handle
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---
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include/agg_rasterizer_cells_aa.h | 9 ++++++++-
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1 file changed, 8 insertions(+), 1 deletion(-)
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diff --git a/include/agg_rasterizer_cells_aa.h b/include/agg_rasterizer_cells_aa.h
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index d3bb138..3a616d9 100644
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--- a/include/agg_rasterizer_cells_aa.h
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+++ b/include/agg_rasterizer_cells_aa.h
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@@ -40,7 +40,8 @@
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#define AGG_RASTERIZER_CELLS_AA_INCLUDED
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#include <string.h>
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-#include <math.h>
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+#include <cstdlib>
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+#include <limits>
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#include "agg_math.h"
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#include "agg_array.h"
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@@ -333,6 +334,12 @@ namespace agg
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{
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int cx = (x1 + x2) >> 1;
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int cy = (y1 + y2) >> 1;
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+
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+ // Bail if values are so large they are likely to wrap
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+ if ((std::abs(x1) >= std::numeric_limits<int>::max()/2) || (std::abs(y1) >= std::numeric_limits<int>::max()/2) ||
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+ (std::abs(x2) >= std::numeric_limits<int>::max()/2) || (std::abs(y2) >= std::numeric_limits<int>::max()/2))
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+ return;
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+
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line(x1, y1, cx, cy);
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line(cx, cy, x2, y2);
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}
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--
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1.8.1.4
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