195 lines
6.9 KiB
PHP
195 lines
6.9 KiB
PHP
<?php
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if (!defined('_GNUBOARD_')) exit;
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@ini_set('memory_limit', '512M');
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function it_img_thumb($filename, $filepath, $thumb_width, $thumb_height, $is_create=false)
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{
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return thumbnail($filename, $filepath, $filepath, $thumb_width, $thumb_height, $is_create);
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}
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// 게시글보기 썸네일 생성
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function get_view_thumbnail($contents)
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{
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global $board;
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$dvc_width = intval($_COOKIE['device_width']);
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if(G4_IS_MOBILE && $dvc_width) {
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// 썸네일 width 설정
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$thumb_width = 320;
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if($dvc_width >= 1000) {
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return $contents;
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} else if($dvc_width >= 760 && $dvc_width < 1000) {
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$thumb_width = 760;
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} else if($dvc_width >= 480 && $dvc_width < 760) {
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$thumb_width = 480;
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}
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} else {
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$thumb_width = $board['bo_image_width'];
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}
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// $contents 중 img 태그 추출
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$matchs = get_editor_image($contents);
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if(!$matchs)
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return $contents;
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for($i=0; $i<count($matchs[1]); $i++) {
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// 이미지 path 구함
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$imgurl = parse_url($matchs[1][$i]);
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$srcfile = $_SERVER['DOCUMENT_ROOT'].$imgurl['path'];
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if(is_file($srcfile)) {
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// 썸네일 높이
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$size = @getimagesize($srcfile);
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if(empty($size))
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continue;
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// 원본 width가 thumb_width보다 작다면
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if($size[0] <= $thumb_width)
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continue;
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// Animated GIF 체크
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$is_animated = false;
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if($size[2] == 1) {
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$is_animated = is_animated_gif($srcfile);
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}
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$thumb_height = round(($thumb_width * $size[1]) / $size[0]);
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$filename = basename($srcfile);
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$filepath = dirname($srcfile);
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// 썸네일 생성
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if(!$is_animated)
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$thumb_file = thumbnail($filename, $filepath, $filepath, $thumb_width, $thumb_height, false);
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else
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$thumb_file = $filename;
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$img_tag = $matchs[0][$i];
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$thumb_tag = str_replace($filename, $thumb_file, $img_tag);
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// img 태그에 width 값이 있을 경우 width 값 바꿔줌
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preg_match("/width=[\'\"]?([0-9]+)[\'\"]?/", $img_tag, $mw);
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if(!empty($mw[1])) {
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$thumb_tag = str_replace($mw[0], str_replace($mw[1], $thumb_width, $mw[0]), $thumb_tag);
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}
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// img 태그에 height 값이 있을 경우 height 값 바꿔줌
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preg_match("/height=[\'\"]?([0-9]+)[\'\"]?/", $img_tag, $mh);
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if(!empty($mh[1])) {
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$thumb_tag = str_replace($mh[0], str_replace($mh[1], $thumb_height, $mh[0]), $thumb_tag);
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}
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$contents = str_replace($img_tag, $thumb_tag, $contents);
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}
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}
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return $contents;
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}
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//function thumbnail($bo_table, $file, $width, $height, $is_create=false)
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function thumbnail($filename, $source_path, $target_path, $thumb_width, $thumb_height, $is_create)
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{
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global $g4;
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$thumb_filename = preg_replace("/\.[^\.]+$/i", "", $filename); // 확장자제거
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if (!is_dir($target_path)) {
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@mkdir($target_path, 0707);
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@chmod($target_path, 0707);
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}
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$thumb_file = "$target_path/thumb-{$thumb_filename}_{$thumb_width}x{$thumb_height}.jpg";
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$thumb_time = @filemtime($thumb_file);
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$source_file = "$source_path/$filename";
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$source_time = @filemtime($source_file);
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if (file_exists($thumb_file)) {
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if ($is_create == false && $source_time < $thumb_time) {
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return basename($thumb_file);
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}
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}
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$size = @getimagesize($source_file);
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// 이미지 파일이 없거나 아님
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if (!$size[0]) {
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if (!$thumb_height) $thumb_height = $thumb_width;
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$thumb_file = "$target_path/thumb-noimg_{$thumb_width}x{$thumb_height}.jpg";
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if (!file_exists($thumb_file)) {
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$target = imagecreate($thumb_width, $thumb_height);
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imagecolorallocate($target, 250, 250, 250);
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imagecopy($target, $target, 0, 0, 0, 0, $thumb_width, $thumb_height);
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imagepng($target, $thumb_file, 0);
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@chmod($thumb_file, 0606); // 추후 삭제를 위하여 파일모드 변경
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}
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return basename($thumb_file);
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}
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// Animated GIF 체크
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if($size[2] == 1) {
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if(is_animated_gif($source_file))
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return basename($source_file);
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}
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$is_imagecopyresampled = false;
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$is_large = false;
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$src = null;
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if ($size[2] == 1) {
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$src = imagecreatefromgif($source_file);
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} else if ($size[2] == 2) {
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$src = imagecreatefromjpeg($source_file);
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} else if ($size[2] == 3) {
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$src = imagecreatefrompng($source_file);
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}
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if ($thumb_width) {
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if ($thumb_height) {
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$rate = $thumb_width / $size[0];
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$tmp_height = (int)($size[1] * $rate);
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if ($tmp_height < $thumb_height) {
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$dst = imagecreatetruecolor($thumb_width, $thumb_height);
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$bgcolor = imagecolorallocate($dst, 250, 250, 250); // 배경색 여기야!!!
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imagefill($dst, 0, 0, $bgcolor);
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imagecopyresampled($dst, $src, 0, 0, 0, 0, $thumb_width, $thumb_height, $size[0], $size[1]);
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} else {
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$dst = imagecreatetruecolor($thumb_width, $thumb_height);
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imagecopyresampled($dst, $src, 0, 0, 0, 0, $thumb_width, $thumb_height, $size[0], $size[1]);
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}
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} else {
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$rate = $thumb_width / $size[0];
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$tmp_height = (int)($size[1] * $rate);
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$dst = imagecreatetruecolor($thumb_width, $tmp_height);
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imagecopyresampled($dst, $src, 0, 0, 0, 0, $thumb_width, $tmp_height, $size[0], $size[1]);
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}
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}
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//imagepng($dst, $thumb_file, 9); // 0 (no compression) ~ 9
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imagejpeg($dst, $thumb_file, 90);
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chmod($thumb_file, 0606); // 추후 삭제를 위하여 파일모드 변경
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return basename($thumb_file);
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}
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function is_animated_gif($filename) {
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if(!($fh = @fopen($filename, 'rb')))
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return false;
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$count = 0;
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// 출처 : http://www.php.net/manual/en/function.imagecreatefromgif.php#104473
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// an animated gif contains multiple "frames", with each frame having a
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// header made up of:
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// * a static 4-byte sequence (\x00\x21\xF9\x04)
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// * 4 variable bytes
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// * a static 2-byte sequence (\x00\x2C) (some variants may use \x00\x21 ?)
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// We read through the file til we reach the end of the file, or we've found
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// at least 2 frame headers
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while(!feof($fh) && $count < 2) {
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$chunk = fread($fh, 1024 * 100); //read 100kb at a time
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$count += preg_match_all('#\x00\x21\xF9\x04.{4}\x00(\x2C|\x21)#s', $chunk, $matches);
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}
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fclose($fh);
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return $count > 1;
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}
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?>
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