resize.php

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<?php
/*
    +--------------------------------------------------------------------------------------------+
    |   DISCLAIMER - LEGAL NOTICE -                                                              |
    +--------------------------------------------------------------------------------------------+
    |                                                                                            |
    |  This program is free for non comercial use, see the license terms available at            |
    |  http://www.francodacosta.com/licencing/ for more information                              |
    |                                                                                            |
    |  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; |
    |  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
    |                                                                                            |
    |  USE IT AT YOUR OWN RISK                                                                   |
    |                                                                                            |
    |                                                                                            |
    +--------------------------------------------------------------------------------------------+

*/
class phMagick_resize{
    function resize(phmagick $p , $width, $height = 0, $exactDimentions = false){
        $modifier = $exactDimentions ? '!' : '>';

        //if $width or $height == 0 then we want to resize to fit one measure
        //if any of them is sent as 0 resize will fail because we are trying to resize to 0 px
        $width  = $width  == 0 ? '' : $width ;
        $height = $height == 0 ? '' : $height ;

        $cmd = $p->getBinary('convert');
        $cmd .=  ' -scale "'. $width .'x'. $height . $modifier ;
        $cmd .= '" -quality '. $p->getImageQuality() ;
        $cmd .=  ' -strip ';
        $cmd .= ' "' . $p->getSource() .'" "'. $p->getDestination().'"';


        $p->execute($cmd);
        $p->setSource($p->getDestination());
        $p->setHistory($p->getDestination());
        return  $p ;
    }

    function resizeExactly(phmagick $p , $width, $height){
        //requires Crop plugin
        //requires dimensions plugin

        $p->requirePlugin('crop');
        $p->requirePlugin('info');

        list($w,$h) = $p->getInfo($p->getSource());

        if($w > $h){
                    $h = $height;
                    $w = 0;
                }else{
                    $h = 0;
                    $w = $width;
                }

                $p->resize($w, $h)->crop($width, $height);

    }

    function onTheFly(phmagick $p,$imageUrl, $width, $height, $exactDimentions = false, $webPath = '', $physicalPath=''){
        //convert web path to physical
        $basePath = str_replace($webPath,$physicalPath, dirname($imageUrl) );
        $sourceFile = $basePath .'/'. basename($imageUrl); ;

        //naming the new thumbnail
        $thumbnailFile = $basePath . '/'.$width . '_' . $height . '_' . basename($imageUrl) ;

        $P->setSource($sourceFile);
        $p->setDestination($thumbnailFile);

        if (! file_exists($thumbnailFile)){
            $p->resize($p,$width, $height, $exactDimentions);
        }

        if (! file_exists($thumbnailFile)){
            //if there was an error, just use original file
            $thumbnailFile = $sourceFile;
        }

        //returning the thumbnail url
        return str_replace($physicalPath, $webPath, $thumbnailFile );

    }
}
?>