Post a link to your code please.

Derick

Hi Derick,

here my thumbnail-function:

function imgthumb($ori,$thump,$thumbQuality,$thumbWidth)
{
    $origImageHandle = ImageCreateFromJPEG($ori);

    $imageWidth = imagesx($origImageHandle);
    $imageHeigth = imagesy($origImageHandle);

    $thumbHeigth = floor($thumbWidth * $imageHeigth / $imageWidth);
    $thumbImageHandle = ImageCreate("$thumbWidth","$thumbHeigth");

    imagecopyresized($thumbImageHandle,$origImageHandle,0,0,0,0,$thumbWidth,$thumbHeigth,imagesx($origImageHandle),imagesy($origImageHandle));
    imagejpeg($thumbImageHandle,$thump,"$thumbQuality");
}

Thx for your fast answer
Andreas

gd-1.x only supports 256 colours.  You should be using the bundled version of gd2 and then ImageCreateTrueColor() instead of ImageCreate() in your code.  Then the thumbnail would look nice.

Actually, never mind, just took a look at your images.  I assume you were also using gd-1.8 with PHP 4.2.3?

Hi Rasmus,

really? Why works the thumbnail function with php 4.2.3 and gd 1.8.x perfectly with more than 256 colours and with php 4.3.x not?

How can I compile the GD2 bundled?
What must I change in my configure command?

Thanks a lot
Andreas

Please provide a complete example script which actually
produces the result you show here.

Hi Sniper,

i use the function:
function imgthumb($ori,$thump,$thumbQuality,$thumbWidth)
{
    $origImageHandle = ImageCreateFromJPEG($ori);

    $imageWidth = imagesx($origImageHandle);
    $imageHeigth = imagesy($origImageHandle);

    $thumbHeigth = floor($thumbWidth * $imageHeigth / $imageWidth);
    $thumbImageHandle = ImageCreate("$thumbWidth","$thumbHeigth");

   
imagecopyresized($thumbImageHandle,$origImageHandle,0,0,0,0,$thumbWidth,
$thumbHeigth,imagesx($origImageHandle),imagesy($origImageHandle));
    imagejpeg($thumbImageHandle,$thump,"$thumbQuality");
}

And this are the example Images:
Original Image: http://www.andreas.boehm.de/1/ori.JPG
Image with 4.2.3: http://www.andreas.boehm.de/1/good.jpg
Image with 4.3.x: http://www.andreas.boehm.de/1/bad.jpg

Andreas

Please provide a _COMPLETE_ example script.

Hi Sniper,

This ist the Script online: http://www.andreas.boehm.de/1/thumb.phtml

And the Source-Code is:
<-- snip -->
<?

imgthumb("ori.JPG","thumb.jpg","65","150");
echo "<img src=thumb.jpg>";

// Erstellt ein Thumbnail
function imgthumb($ori,$thump,$thumbQuality,$thumbWidth)
{
    // Function die aus einem JPEG-Bild ein
    // kleineres Bild erzeugt.
    //    $ori   = Pfad der Originaldatei
    //    $thump = Pfad des kleinen Bilds

    $origImageHandle = ImageCreateFromJPEG($ori);

    $imageWidth = imagesx($origImageHandle);
    $imageHeigth = imagesy($origImageHandle);

    $thumbHeigth = floor($thumbWidth * $imageHeigth / $imageWidth);
    $thumbImageHandle = ImageCreate("$thumbWidth","$thumbHeigth");

    imagecopyresized($thumbImageHandle,$origImageHandle,0,0,0,0,$thumbWidth,$thumbHeigth,imagesx($origImageHandle),imagesy($origImageHandle));
    
    imagejpeg($thumbImageHandle,$thump,"$thumbQuality");
}

?>
<-- snap -->


At the moment the Script works perfectly - i have installed the PHP Version 4.2.3.
If I install 4.3.x with the same script would be very bad like: http://www.andreas.boehm.de/1/bad.jpg

Bye
Andreas

Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

If you change ImageCreate() to ImageCreateTrueColor() the images instantly become nice & clear. For the record I have tested this php 4.2.3 linked against the native GD library 2.0+ the results were the same.

Ok,

but my problim is who can I use the "the native GD library 2.0+ "

with this configure Command:
'./configure' '--with-mysql' '--with-gd' '--with-apxs' '--with-jpeg-dir'
'--with-png-dir' '--with-zlib-dir' '--enable-track-vars=yes'
'--enable-url-includes=yes' '--with-tiff-dir' '--with-pdflib'
'--enable-shared-pdflib' '--with-ttf' '--with-imap' '--with-kerberos'
'--with-imap-ssl' '--with-gettext' '--enable-ftp'

can me somebody help?
thanks
Andreas