간절.. 썸네일 원본비율 출력 질문입니다!

http://sir.co.kr/bbs/board.php?bo_table=g4_skin&wr_id=139676&sfl=mb_id%2C1&stx=dodo

요 게시판을 사용중인데요.

썸네일이 원본 비율 유지하면서 출력되는 방법을 모르겠습니다.
저도 노력한다고 했는데 몇 시간째 연구해도 해결이 되지 않습니다.


아마도 요 파일에 정답이 있을것 같은데요 skin.lib.php

부디 도와주시면 감사하겠습니다


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<?
if (!defined("_GNUBOARD_")) exit; // 개별 페이지 접근 불가

if (!function_exists("makeThumbs")) {

function makeThumbs($oriPath, $oriFileName, $thmWidth="", $thmHeight="", $thmAlt="") {
global $g4, $board_skin_path;

$errorFilePrt = "<img src=\"".$board_skin_path."/img/noimage.gif\" border=\"0\" alt=\"이미지 없음\" />";

$oriFile = $oriPath . "/" . $oriFileName;
if (is_file($oriFile) == false) return $errorFilePrt; // 원본 부재

$thmPath = $oriPath . "/thumbs";
$thmFile = $thmPath . "/" . $oriFileName;

$oriSize = getimagesize($oriFile);
$oriWidth = $oriSize[0];
$oriHeight = $oriSize[1];
$oriType = $oriSize[2];

if ($oriType > 3) return $errorFilePrt; // 원본 이미지 타입 오류

$oriRate = $oriWidth / $oriHeight;

if ($thmWidth == "" && $thmHeight == "") return $errorFilePrt; // 썸네일 사이즈 미지정

if ($thmWidth == "") $thmWidth = $thmHeight * $oriRate;
if ($thmHeight == "") $thmHeight = $thmWidth / $oriRate;

$widthRate = $thmWidth / $oriWidth;
$heightRate = $thmHeight / $oriHeight;

$oriFilePrt = "<img src=\"".$oriFile."\" width=\"".$oriWidth."\" height=\"".$oriHeight."\" border=\"0\" alt=\"".$thmAlt."\" />";

if ($widthRate >= 1 && $heightRate >= 1) return $oriFilePrt; // 리사이징 불필요

if (file_exists($thmFile)) { // 썸네일 유무

$fp = fopen($thmFile, "r");
$fstat = fstat($fp);
$thmFileTime = $fstat['ctime'];
fclose($fp);

$fp = fopen($oriFile, "r");
$fstat = fstat($fp);
$oriFileTime = $fstat['ctime'];
fclose($fp);

if (is_dir($oriPath . "/thumbs/")) {
$array1 = $array2 = array();
if ($dh = opendir($oriPath . "/thumbs/")) {
while (($file = readdir($dh)) !== false) {
$array1[] = $file;
}
closedir($dh);
}
if ($dh = opendir($oriPath . "/")) {
while (($file = readdir($dh)) !== false) {
$array2[] = $file;
}
closedir($dh);
}
$array_diff = array_diff($array1, $array2);
foreach ($array_diff as $k => $v) {
if (is_file($oriPath . "/thumbs/" . $v)) @unlink($oriPath . "/thumbs/" . $v);
}
}

$thmFileSize = getimagesize($thmFile);

if ($thmWidth == $thmFileSize[0] && $thmHeight == $thmFileSize[1]) { // 썸네일 갱신 불필요
if ($thmFileTime > $oriFileTime) {
$thmSize = getimagesize($thmFile);
$thmFilePrt = "<img src=\"".$thmFile."\" width=\"".$thmSize[0]."\" height=\"".$thmSize[1]."\" border=\"0\" alt=\"".$thmAlt."\" />";
return $thmFilePrt;
}
}

}

@unlink($thmFile);
@mkdir($thmPath);
@chmod($thmPath, 0707);

if ($widthRate < $heightRate) {
$tempWidth = (int)($oriWidth * $heightRate);
$tempHeight = $thmHeight;
} else {
$tempWidth = $thmWidth;
$tempHeight = (int)($oriHeight * $widthRate);
}

if ($tempWidth == "") $tempWidth = $thmWidth;
if ($tempHeight == "") $tempHeight = $thmHeight;

switch($oriType) {
case(1) :
if(function_exists('imagecreateFromGif')) $tempImage = imagecreateFromGif($oriFile);
break;
case(2) :
if(function_exists('imagecreateFromJpeg')) $tempImage = imagecreateFromJpeg($oriFile);
break;
case(3) :
if(function_exists('imagecreateFromPng')) $tempImage = imagecreateFromPng($oriFile);
break;
}

if ($tempImage) {
if (function_exists('imagecreatetruecolor')) {
$tempCanvas = imagecreatetruecolor($thmWidth, $thmHeight);
} else {
$tempCanvas = imagecreate($thmWidth, $thmHeight);
}

if (function_exists('imagecopyresampled')) {
imagecopyresampled($tempCanvas, $tempImage, 0, 0, 0, 0, $tempWidth, $tempHeight, ImageSX($tempImage), ImageSY($tempImage));
} else {
imagecopyresized($tempCanvas, $tempImage, 0, 0, 0, 0, $tempWidth, $tempHeight, ImageSX($tempImage), ImageSY($tempImage));
}
ImageDestroy($tempImage);
ImageJpeg($tempCanvas, $thmFile, 100);
ImageDestroy($tempCanvas);
unset($tempImage, $tempCanvas);
}

$thmFilePrt = "<img src=\"{$thmFile}\" width=\"{$thmWidth}\" height=\"{$thmHeight}\" border=\"0\" alt=\"{$thmAlt}\" />";

return $thmFilePrt;
}
}
?>