zclassifieds better thumbnails

Major Joined: Jan 13, 2003 Posts: 892

I just did this real quick but is hugely better quality of thumnails. Code is basically scavenged from phphotoalbum by Henning Støverud (Coppermines daddy so to speak)

Ok so here goes written for gd2 (Just change imagecreate function to use with earlier gd versions). There is one variable to set (thumbnails width) $newWidth = 200 change to desired size.

Open modules/ZClassifieds/common.php

Find Near Bottom function makeThumb

Code:

function makeThumb( $scrFile, $dstFile, $dstW=120, $dstH=100 )
{
   $im = ImageCreateFromJPEG( $scrFile );
   $srcW = ImageSX( $im );
   $srcH = ImageSY( $im );
   $ni = ImageCreate( $dstW, $dstH );
   ImageCopyResized( $ni, $im, 0, 0, 0, 0, $dstW, $dstH, $srcW, $srcH );
   ImageJPEG( $ni, $dstFile );
}

Replace complete function with:

Code:

function makeThumb( $scrFile, $dstFile)
{
// find the image size
$imginfo = @getimagesize($scrFile);
if ($imginfo == NULL)
return false;

// height/width edit $newWidth to your desired size for thumbnails
$srcWidth = $imginfo[0];
$srcHeight = $imginfo[1];
$newWidth = 200;
$ratioWidth = $srcWidth/$newWidth;
$ratioHeight = 0;
$destWidth = $newWidth;
$destHeight = $srcHeight / $ratioWidth;
$src_img = imagecreatefromjpeg($scrFile);
$dst_img = ImageCreateTrueColor($destWidth,$destHeight);
imagecopyresized($dst_img, $src_img, 0, 0, 0, 0, $destWidth,(int)$destHeight, $srcWidth, $srcHeight);
imagejpeg($dst_img, $dstFile, 100); // Quality = 100
imagedestroy($src_img);
imagedestroy($dst_img);

return $dstFile;
}

This could be done a little better define $newWidth in vars.php instead. But no matter what it makes helluva lot nicer thumbnails that are as close to ImageMagick or NetPBM as we'll get with GD IMHO!

Have Fun! Peter

Major Joined: Jan 13, 2003 Posts: 892

I have to add that in detail.php around line 80 edit or remove width=\"120\" height=\"100\" to reflect thumbnails new size if changed from 120.

Note* Also the table <td width= % will need adjusting default is 20% and 80% at 200 width I used 30% 70% looks pretty good. There are about 5 instances in default.php