Ridimensiona usando la larghezza come riferimento (dalle Pillole)

[Tremisfero]

Risolto.
Ecco la classe adatta allo scopo, da sostituire a quella presente nell'image.class.php:

function SaveProportionateImage($filename, $quality, $width){ 

        $dest_width = $width; 
        $ratio = $this->src_width / $dest_width; 
        $dest_height = $this->src_height / $ratio; 

        if ($dest_width >= $this->src_width){ 
           $dest_height = $this->src_height; 
           $dest_width  = $this->src_width; 
        } 

        $dest_image = imagecreatetruecolor( $dest_width,$dest_height); 

        imagecopyresampled($dest_image, $this->src_image, 0, 0, 0, 0, 

            $dest_width, 

            $dest_height, 

            $this->src_width, 

            $this->src_height); 

        imagejpeg($dest_image, $filename.'.jpg', $quality); 

        imagedestroy($dest_image); 

    }