Hello.
When start and end point in TraceArcPath are the same
the function just returns. This is an error because
it should set the primite_info->coordinates which
is used in the calling function. Sometimes
primite_info->coordinates is uninitialized and
the calling function breaks accessing unallocated
memory.
I fixed it so it adds a point to primitive_info.
Maybe it could set primite_info->coordinates to
0 but I am not sure it is valid.
Marko Mahnič
ImageMagick 6.3.0-6 Q8
--- draw.c.orig 2006-10-23 23:02:22.000000000 +0200
+++ draw.c 2006-11-30 16:02:18.718750000 +0100
@@ -4357,11 +4368,14 @@
unsigned long
arc_segments;
if ((start.x == end.x) && (start.y == end.y))
+ {
+ TracePoint(primitive_info, end);
return;
+ }
radii.x=fabs(arc.x);
radii.y=fabs(arc.y);
if ((radii.x == 0.0) || (radii.y == 0.0))
{
TraceLine(primitive_info,start,end);
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