Png transparency

[Cecile Muller]

I've been trying to just open a png and display it, that way:

<?
header ("Content-type: image/png");
$im = imagecreatefrompng('empty.png');
imagepng($im);
?>

But the transparency is not kept. I did try in netscape too,
but it's visible even in explorer, when comparing how the
direct image looks and how it looks when thru the script, that
transparency was killed.

Ideas (on how to solve or at least which, from
imagecreatefrompng or imagepng, kills the transparency) ?
I got php 4.3.1 and the bundled GD of it.

[Justin Koivisto]

Cecile Muller wrote:

> I've been trying to just open a png and display it, that way:
>
> <?
> header ("Content-type: image/png");
> $im = imagecreatefrompng('empty.png');
> imagepng($im);
> ?>
>
> But the transparency is not kept. I did try in netscape too,
> but it's visible even in explorer, when comparing how the
> direct image looks and how it looks when thru the script, that
> transparency was killed.
>
> Ideas (on how to solve or at least which, from
> imagecreatefrompng or imagepng, kills the transparency) ?
> I got php 4.3.1 and the bundled GD of it.

If it worked in Netscape, and not explorer, that's normal. However,
there is a workaround you can use in the image tag:

[url]http://www.koivi.com/ie-png-transparency/[/url]

HTH

--
Justin Koivisto - [email]spam@koivi.com[/email]
PHP POSTERS: Please use comp.lang.php for PHP related questions,
alt.php* groups are not recommended.

[Pat Scott]

I had the same problem. If you create the .png as a 'true color' graphic,
it will not be transparent. When I created the same graphic using a '256
color' palatte, transparency worked fine.

Pat Scott
"Cecile Muller" <spam@wildpeaks.com> wrote in message
news:aff31ac6.0308131736.7b1c0e56@posting.google.c om...

> I've been trying to just open a png and display it, that way:
>
> <?
> header ("Content-type: image/png");
> $im = imagecreatefrompng('empty.png');
> imagepng($im);
> ?>
>
> But the transparency is not kept. I did try in netscape too,
> but it's visible even in explorer, when comparing how the
> direct image looks and how it looks when thru the script, that
> transparency was killed.
>
> Ideas (on how to solve or at least which, from
> imagecreatefrompng or imagepng, kills the transparency) ?
> I got php 4.3.1 and the bundled GD of it.