Changing (jpg) Image size

I am looking for a way to resize uploaded (jpg) images automatically.
My ISP hasn't got any preinstalled image manipulation library installed
on the (centos) serverhost, so I either have to come up with something
in PHP, Perl, Java or some other (CGI) applet/application.

GD is installed and active, but I can't find any suitable function so far.

Preferrably I stick to PHP, but if it isn't possible I would opt for any
of the alternatives.

Any good tips, pointers, links?
Thanks!
Sh.

Schraalhans Keukenmeester wrote:[color=blue]
> I am looking for a way to resize uploaded (jpg) images automatically.
> My ISP hasn't got any preinstalled image manipulation library installed
> on the (centos) serverhost, so I either have to come up with something
> in PHP, Perl, Java or some other (CGI) applet/application.
>
> GD is installed and active, but I can't find any suitable function so far.
>
> Preferrably I stick to PHP, but if it isn't possible I would opt for any
> of the alternatives.
>
> Any good tips, pointers, links?
> Thanks!
> Sh.[/color]
Whoops, sorry, found the imagecreatefrom and imagecopyresized functions.
My bad. Simply missed those on first reading the imagefunction chapters.

Rgds
Sh.

Hello Schraalhans,

Please use following function which was developed by me you can use it
directly.

If u have any problem Please contact me on mitul[at]siliconinfo[dot]com

function thumbgenerator($forcedwidth, $forcedheight, $sourcefile,
$destfile, $imgcomp)
{
$g_imgcomp=100-$imgcomp;
$g_srcfile=$sourcefile;
$g_dstfile=$destfile;
$g_fw=$forcedwidth;
$g_fh=$forcedheight;
if(file_exists($g_srcfile))
{
$g_is=getimagesize($g_srcfile);
if(($g_is[0]-$g_fw)>=($g_is[1]-$g_fh))
{
$g_iw=$g_fw;
$g_ih=($g_fw/$g_is[0])*$g_is[1];
}
else
{
$g_ih=$g_fh;
$g_iw=($g_ih/$g_is[1])*$g_is[0];
}
$src=explode(".",$g_srcfile);
$var=count($src);
if($src[$var-1]=='gif' || $src[$var-1]=='GIF')
{
$img_src=ImageCreateFromGIF($g_srcfile);
//$img_src= ImageColorAllocate($img_src, 250, 250, 250);
$img_dst=imagecreate($g_iw,$g_ih);
$img_dst1 = ImageColorAllocate($img_dst, 255, 255, 255);
}
if($src[$var-1]=='png')
{
$img_src=ImageCreateFromPNG($g_srcfile);
$img_dst=imagecreate($g_iw,$g_ih);
$img_dst1 = ImageColorAllocate($img_dst,255, 255, 255);
}
if($src[$var-1]=='jpg' || $src[$var-1]=='JPG')
{
$img_src=imagecreatefromjpeg($g_srcfile);
$img_dst=imagecreate($g_iw,$g_ih);
$img_dst = &imageCreateTrueColor( $g_iw, $g_ih);
}

imagecopyresampled($img_dst, $img_src, 0, 0, 0, 0, $g_iw, $g_ih,
$g_is[0], $g_is[1]);
if($src[$var-1]=='jpg' || $src[$var-1]=='JPG')
{
imagejpeg($img_dst, $g_dstfile, $g_imgcomp);
}
if($src[$var-1]=='png')
{
imagepng($img_dst, $g_dstfile, $g_imgcomp);
}
if($src[$var-1]='gif' || $src[$var-1]=='GIF')
{
imagegif($img_dst, $g_dstfile, $g_imgcomp);
}
imagedestroy($img_dst);
return true;
}
else
return false;
}