Problem with GD

[Alex Shi]

Hello,

I'm running into a strange issue with GD. Please review
the script attached bellow. I'm using it to generate thumbnail
icon on a fly. I don't know why it gives different results on
different servers. Php on my development server is 4.0.6
and GD is 1.6.2 or higher with jpg/gif/png enabled. The
script works fine and generates very clear icon picture on
my server. However, on the application server, it works
but generate blur image. Php on that server is 4.3.0 and
GD is 2.0 with jpg/gif/png enabled. How come with higher
version it gives poorer performance? Thanks in advance.

Alex

<?
$picName = $HTTP_GET_VARS['pic'];

$picSize = getimagesize ('../pictures/'.$picName);
$thePic = imagecreatefrom jpeg ('../pictures/'.$picName);
$nHeight = 50;
$ratio = $nHeight / $picSize[1];
$nWidth = round ($ratio * $picSize[0]);
$thm = @imagecreate ($nWidth, $nHeight)
or die ("Cannot Initialize new GD image stream");

/*
$result = imagecopyresamp led ($thm, $thePic, 0, 0, 0, 0,
$nWidth, $nHeight, $picSize[0], $picSize[1]);
*/
/*
on my development server imagecopyresamp led don't work but
imagecopyresize d works fine.
*/

$result = imagecopyresize d ($thm, $thePic, 0, 0, 0, 0,
$nWidth, $nHeight, $picSize[0], $picSize[1]);
header ("Content-type: image/png");
$result = imagepng ($thm);
?>

[Joachim Mæland]

Re: Problem with GD

On Thu, 11 Mar 2004 14:24:46 -0500, Alex Shi wrote:
[color=blue]
> I'm running into a strange issue with GD. Please review the script
> attached bellow. I'm using it to generate thumbnail icon on a fly. I
> don't know why it gives different results on different servers. Php on
> my development server is 4.0.6 and GD is 1.6.2 or higher with
> jpg/gif/png enabled. The script works fine and generates very clear icon
> picture on my server. However, on the application server, it works but
> generate blur image. Php on that server is 4.3.0 and GD is 2.0 with
> jpg/gif/png enabled. How come with higher version it gives poorer
> performance? Thanks in advance.[/color]
[..][color=blue]
> $thm = @imagecreate ($nWidth, $nHeight)
> or die ("Cannot Initialize new GD image stream");[/color]

How about...?

if GD >= 2.0
$thm = @imagecreatetru ecolor

--
mvh/regards
Joachim Mæland

If everything seems under control, you're just not going fast enough.
-Mario Andretti

[Alex Shi]

Re: Problem with GD

> > I'm running into a strange issue with GD. Please review the script[color=blue][color=green]
> > attached bellow. I'm using it to generate thumbnail icon on a fly. I
> > don't know why it gives different results on different servers. Php on
> > my development server is 4.0.6 and GD is 1.6.2 or higher with
> > jpg/gif/png enabled. The script works fine and generates very clear icon
> > picture on my server. However, on the application server, it works but
> > generate blur image. Php on that server is 4.3.0 and GD is 2.0 with
> > jpg/gif/png enabled. How come with higher version it gives poorer
> > performance? Thanks in advance.[/color]
> [..][color=green]
> > $thm = @imagecreate ($nWidth, $nHeight)
> > or die ("Cannot Initialize new GD image stream");[/color]
>
> How about...?
>
> if GD >= 2.0
> $thm = @imagecreatetru ecolor
>[/color]

That really works the correct way, thanks a lot!

Alex
[color=blue]
> --
> mvh/regards
> Joachim Mæland
>
> If everything seems under control, you're just not going fast enough.
> -Mario Andretti
>[/color]