Re: [GD-DEVEL] bug and fix

Hi Ducky,

On 7/19/07, Ducky Sherwood <[email protected]> wrote:
> Hi --
>
> I found a bug in gdImageFilledPolygon.
>
> In some cases, you can get an odd number of x-intercepts, which means that
> in the call to gdImageLine
>   gdImageLine (im, im->polyInts[i], y, im->polyInts[i + 1], y, fill_color);
> the im->polyInts[i+1] will be garbage.  This can mess up the drawing of the
> line.
>
> I have attached a test case (bug.c) which shows a horizontal line being
> drawn where it shouldn't.
>
> I have also attached a patch, made with
>    diff -Naur gd.c gd.c.good > horizontalLineBug.patch
>
> (I would have reported the bug and patch on flypaper, but I never saw a
> reply (and yes, I told it my correct email address, and no, I couldn't find
> it in my spam folder).)

Thanks for the patch, I will check it over the weekend. I also created
your account manually (see my prv mail), if you like to add it in
bugs.libgd.org.

Cheers,
--Pierre