antialiasing line features..

[thomas bonfort]

the last version.
I seem to remember the antialiasing code was changed recently in gd.

On 10/26/05, Steve Lime <steve.lime at dnr.state.mn.us> wrote:
> What version of GD are you using?
>
> >>> thomas bonfort <thomas.bonfort at GMAIL.COM> 10/26/05 1:55 AM >>>
> hi list,
> I'm also having problems with mapserver or mapscript dying on certain
> antialiased lines. I think I tracked the bug down to gd, I still have
> to find the time to find out in what cases it happens. For those
> interrested, for me gd segfaults for me in file gd.c on line 3055,
> because it is called with out of bounds values for pixel position. the
> call is being made on lines 3098 or 3119, with the argument
> (y>>16)+1 (line 3098)
> or
> (x>>16)+1 (line 3119)
> which seems to me to be out of image bounds.
>
> My fix is to set the clipping regions of lines 3069-3071 to 1 pixel
> inside, which is a quick workaround which prevents the segfaults, but
> produces poor quality for short line segments.
>
> cheers,
> tb
>