Re: [GD-DEVEL] PNG filter support

Hello Keith,

On 1/17/07, Keith Ito <[email protected]> wrote:
> Hi,
>
> My apologies in advance if this is the wrong list for feature requests.

This list is the right place, we discuss GD development :-)

> Anyhow, I'd like to request that GD expose an API allowing the caller
> to control the filter used when writing PNG images.  There is a
> comment in gd_png.c saying this would be done in gdImagePngCtxEx(),
> but I suppose it was overlooked when that function was added.

I already did it for the PHP bundled libgd. I only did not merge it
yet into the official libgd, you can see the details here (using PHP):

http://blog.thepimp.net/index.php/post/2006/01/27/35-imagepng-take-2
http://blog.thepimp.net/index.php/post/2005/12/12/29-what-s-new-in-gd-51x-2

I like to merge this addition in 2.1.0.

> I have attached a patch that adds new functions to allow the caller to
> specify the PNG filter in calls to gdImagePngXXX.  Please let me know
> if this is something you would consider accepting.

I think your patch got droped by the list (use .txt). However please
open an issue here:

http://bugs.libgd.org

So your patch will not get lost. I will check it and see what is the
best solutions (will post both APIs additions to the list).

Thanks,
--Pierre