<?php
//require_once('class/FileLogger.php');
class resizer
{
    var $quality = 75;
    var $maxSize = 214700;
    var $_use_resizer = 'IM';

    function resizer($fullPath, $width, $height, $iconName)
    {
        $width  = $this->_validateSize($width);
        $height = $this->_validateSize($height);

//        $externalResizer = $this->_testForExternalResizer();
//        switch ($externalResizer) {
        switch ($this->_use_resizer) {
            case 'IM':
				$this->_resizeIM($fullPath, $width, $height, $iconName);
				break;

            case 'GD':
                $this->_resizeGD($fullPath, $width, $height, $iconName);
				break;
        }
    }

	function _testForExternalResizer()
	{
		$result = `which convert`;
		if (!empty($result)) {
		    return 'IM';
		}

		if (extension_loaded('gd')) {
		    return 'GD';
		}

		return false;
	}

	function _validateSize($size)
	{
        $size = intval($size);
        if (empty($size)) {
            $size = $this->maxSize;
        }
        return $size;
	}

	function _getNewSize($fullPath, $width, $height)
	{
	    list($oldWidth, $oldHeight, $type, $attr) = getimagesize($fullPath);

		if (($oldWidth / $oldHeight) >= ($width / $height)) {
			$newx = $width;
			$widn = $oldWidth/$width ;
			$newy = floor($oldHeight / $widn);
		} else {
			$widn =  $oldHeight/$height;
			$newx = floor( $oldWidth / $widn);
			$newy = $height;
		}

		return array("width" => $newx, "height" => $newy);
	}

	function _resizeGD($fullName, $width, $height, $iconFullName)
	{
	    $size = $this->_getNewSize($fullName, $width, $height);
	    $newx = $size['width'];
	    $newy = $size['height'];

        list($oldWidth, $oldHeight, $imgType, $attr) = getimagesize($fullName);

		$destimg = imagecreatetruecolor($newx, $newy);

		if ($imgType == 1) {
			$sourceimg = imagecreatefromgif ($fullName);
		} elseif ($imgType == 2) {
			$sourceimg = imagecreatefromjpeg ($fullName);
		} elseif ($imgType == 3) {
			$sourceimg = imagecreatefrompng ($fullName);
		}

         if ($gdver == 1) {
         	imagecopyresized($destimg, $sourceimg, 0, 0, 0, 0, $newx, $newy, $oldWidth, $oldHeight);
         } else {
         	@imagecopyresampled($destimg, $sourceimg, 0, 0, 0, 0, $newx, $newy, $oldWidth, $oldHeight);
         }

		if ($imgType == 1) {
			imagegif($destimg, $iconFullName, $this->quality);
		} elseif ($imgType == 2) {
			imagejpeg($destimg, $iconFullName, $this->quality);
		} elseif ($imgType == 3) {
			imagepng($destimg, $iconFullName, $this->quality);
		}

		return true;
	}

	function _resizeIM($fullName, $width, $height, $iconFullName)
	{
		$r = "convert -size ".$width.'x'.$height." '$fullName' -resize ".$width.'x'.$height." +profile \"*\" '$iconFullName'";
        $out = shell_exec($r);
//        FileLogger('/tmp/_resize_log.txt', array($r, implode("\n", GetBacktrace())));
//		`$r`;
		return true;
	}

}