crop-and-fit.php

<?php
function resizeImage($source, $dest, $new_width, $new_height, $quality)
{
    // Taken from http://salman-w.blogspot.com/2009/04/crop-to-fit-image-using-aspphp.html
    $image = new Phalcon\Image\Adapter\GD($source);
    $source_height = $image->getHeight();
    $source_width = $image->getWidth();
    $source_aspect_ratio = $source_width / $source_height;
    $desired_aspect_ratio = $new_width / $new_height;
    if ($source_aspect_ratio > $desired_aspect_ratio) {
        $temp_height = $new_height;
        $temp_width = ( int ) ($new_height * $source_aspect_ratio);
    } else {
        $temp_width = $new_width;
        $temp_height = ( int ) ($new_width / $source_aspect_ratio);
    }
    $x0 = ($temp_width - $new_width) / 2;
    $y0 = ($temp_height - $new_height) / 2;
    $image->resize($temp_width, $temp_height)->crop($new_width, $new_height, $x0, $y0);
    $image->save($dest, $quality);
}