<?
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;
	}
}
?>