ID:               32323
 User updated by:  bavaglino at west dot de
 Reported By:      bavaglino at west dot de
-Status:           Feedback
+Status:           Open
 Bug Type:         *Graphics related
 Operating System: Linux infong 2.4 #1
 PHP Version:      4.3.10
 Assigned To:      pajoye
 New Comment:

ok here we go.

i made a few test with different sizes of pictures.
above 2900 x 1933 pixel the thumbnail is only black.

i use this code for upload the picture:
--------------------------------------------------
###links zum Uploadverzeichnis###
$bildlink = "thumbs" ;

$dateiname = $_FILES['datei']['name'] ;
$dateitype = $_FILES['datei']['type'] ;
$dateisize = $_FILES['datei']['size'] ;

if (empty($dateiname)) {$fehlermeldung = ''.$TEXT['FILENAME'].'' ; }

elseif ( $dateisize > '5240000') {$fehlermeldung =
''.$TEXT['FILESIZE'].'' ; }

elseif ( strlen( $dateiname ) > '25')
{    
$dateinamengroesse = strlen($dateiname) - 25 ;
$fehlermeldung = ''.$TEXT['FILELAENGE'].'' ;
}
    
  elseif ( $dateitype == 'image/jpeg' || $dateitype == 'image/pjpeg' )
{
  
    ## umwandeln von umlauten ##
    $dateiname1 = strtr("$dateiname", " äöüß", "_aous") ;
    
    ## umwandeln in kleinbuchstaben ##
    $dateiname2 = strtolower("$dateiname1") ;

    $bildteil = split("[.]",$dateiname2) ;
    $dateivorhanden =
file_exists($bildlink.'/'.$bildteil[0].'_norm.'.$bildteil[1]) ;

if ($dateivorhanden) {$fehlermeldung = ''.$TEXT['FILEEXIST'].'' ;}

    else {
      ## originalbild uploaden ##
      move_uploaded_file( $datei , $bildlink.'/'.$dateiname2 ) ;

      ## wie groß ist das originalbild ##
      $gross = getimagesize( $bildlink.'/'.$dateiname2 ) ;
      $breite = $gross[0] ;
      $hoehe = $gross[1] ;
      $typ = $gross[2] ;

      $hoehe_norm = $hoehe * 200 / $breite ;
      $image_norm = imagecreatetruecolor( 200 , $hoehe_norm ) ;

      ## neuen namen fürs thumbnail vergeben ##
      $bild_s = split("[.]",$dateiname2);
      $dateiname2_norm = $bild_s[0].'_norm.'.$bild_s[1] ;

      ## thumbnail erstellen ##
      $image_norm = imagecreatetruecolor(200, $hoehe_norm);
      $image = imagecreatefromjpeg( $bildlink.'/'.$dateiname2 ) ;
        imagecopyresampled($image_norm, $image, 0,0,
0,0,200,$hoehe_norm,$breite,$hoehe);
      imagejpeg($image_norm, $bildlink.'/'.$dateiname2_norm , 100 );

      $fehlermeldung = ''.$TEXT['FILEDONE'].'' ;
    }
  }
   else {$fehlermeldung = ''.$TEXT['FILEDONEERROR'].'';
  }
} 
-------------------------------------------------

please download example pictures here:

original picture with 3072 pixel:
http://www.klixx.com/picsearch/thumbs/testbild_3072.jpg

example picture with 2600 pixel:
http://www.klixx.com/picsearch/thumbs/testbild_2600.jpg

example picture with 2900 pixel:
http://www.klixx.com/picsearch/thumbs/testbild_2900.jpg

thanks for help


Previous Comments:
------------------------------------------------------------------------

[2005-03-15 21:51:41] [EMAIL PROTECTED]

Please provide the original image. Use a simple script without dynamic
values, something like the sample available at 
http://de3.php.net/imagecopyresampled

--Pierre

------------------------------------------------------------------------

[2005-03-15 20:23:14] bavaglino at west dot de

i changed $image_norm with $image now it's correct for this post, but
still larger pictures only thumbnails in black.

imagecopyresampled($image_norm, $image, 0,0,
0,0,200,$hoehe_norm,$breite,$hoehe);

------------------------------------------------------------------------

[2005-03-15 19:57:49] bavaglino at west dot de

Description:
------------
I have a picture upload which upload the original file and a thumbnail
pic. it works fine, but when i use a picture for example with 180DPI
and 3000 x 2000 Pixel, the created thumbnail is only black.

with a smaller resolution it works fine.

Reproduce code:
---------------
 $image = imagecreatefromjpeg( $bildlink.'/'.$dateiname2 ) ;
imagecopyresampled($image, $image_norm, 0,0,
0,0,200,$hoehe_norm,$breite,$hoehe);
imagejpeg($image_norm, $bildlink.'/'.$dateiname2_norm , 100 ); 

Expected result:
----------------
i want to see the picture in a smaller version but not a black 
picture.



------------------------------------------------------------------------


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