source: branches/dev/data/lib/thumb.php @ 8

<?php
# MakeThumb(½ÐÎϸµ²èÁü¥Ñ¥¹¡Ê¥Õ¥¡¥¤¥ë̾¤Þ¤Ç¡Ë, ½ÐÎÏÀè¥Õ¥©¥ë¥À¡Ê/home/hoge/ ¤Ê¤É¡Ë , ºÇÂç²£Éý , ºÇÂç½ÄÉý , ¿·¥Õ¥¡¥¤¥ë̾¡Ë
function MakeThumb($FromImgPath , $ToImgPath , $tmpMW , $tmpMH, $newFileName = ''){

# ¢¡¡þ¢¡¡¡¥Ç¥Õ¥©¥ë¥ÈÃͤÎÀßÄê¡¡¢¡¡þ¢¡
# ɬÍפ˱þ¤¸¤ÆÊѹ¹¤·¤Æ²¼¤µ¤¤¡£

# ²èÁü¤ÎºÇÂç²£Éý¡Êñ°Ì¡§¥Ô¥¯¥»¥ë¡Ë
$ThmMaxWidth = 500;

# ²èÁü¤ÎºÇÂç½ÄÉý¡Êñ°Ì¡§¥Ô¥¯¥»¥ë¡Ë
$ThmMaxHeight = 500;

# ¥µ¥à¥Í¥¤¥ë²èÁü¤ÎÀÜƬʸ»ú
$PreWord = $head;

# ¢¡¡þ¢¡¡¡ÀßÄꤳ¤³¤Þ¤Ç¡¡¢¡¡þ¢¡

    //³ÈÄ¥»Ò¼èÆÀ
    if (!$ext) {
        $array_ext = explode(".", $FromImgPath);
        $ext = $array_ext[count($array_ext) - 1];
    }
    
    $MW = $ThmMaxWidth;
    if($tmpMW) $MW = $tmpMW; # $MW¤ËºÇÂç²£Éý¥»¥Ã¥È  
    
    $MH = $ThmMaxHeight;
    if($tmpMH) $MH = $tmpMH; # $MH¤ËºÇÂç½ÄÉý¥»¥Ã¥È
    
    if(empty($FromImgPath) || empty($ToImgPath)){ # ¥¨¥é¡¼½èÍý
        return array(0,"½ÐÎϸµ²èÁü¥Ñ¥¹¡¢¤Þ¤¿¤Ï½ÐÎÏÀè¥Õ¥©¥ë¥À¤¬»ØÄꤵ¤ì¤Æ¤¤¤Þ¤»¤ó¡£");
    }
    
    if(!file_exists($FromImgPath)){ # ¥¨¥é¡¼½èÍý
        return array(0,"½ÐÎϸµ²èÁü¤¬¸«¤Ä¤«¤ê¤Þ¤»¤ó¡£");
    }
    
    $size = @GetImageSize($FromImgPath);
    $re_size = $size;
    
    if(!$size[2] || $size[2] > 3){ # ²èÁü¤Î¼ïÎबÉÔÌÀ or swf
        return array(0,"²èÁü·Á¼°¤¬¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤Þ¤»¤ó¡£");
    }

    //¥¢¥¹¥Ú¥¯¥ÈÈæ¸ÇÄê½èÍý
    $tmp_w = $size[0] / $MW;
    
    if($MH != 0){
        $tmp_h = $size[1] / $MH;
    }
    
    if($tmp_w > 1 || $tmp_h > 1){
        if($MH == 0){
            if($tmp_w > 1){
                $re_size[0] = $MW;
                $re_size[1] = $size[1] * $MW / $size[0];
            }
        } else {
            if($tmp_w > $tmp_h){
                $re_size[0] = $MW;
                $re_size[1] = $size[1] * $MW / $size[0];
            } else {
                $re_size[1] = $MH;
                $re_size[0] = $size[0] * $MH / $size[1];
            }
        }
    }   
    
    # ¥µ¥à¥Í¥¤¥ë²èÁü¥Õ¥¡¥¤¥ë̾ºîÀ®½èÍý
    $tmp = array_pop(explode("/",$FromImgPath)); # /¤Î°ìÈֺǸå¤òÀÚ¤ê½Ð¤·
    $FromFileName = array_shift(explode(".",$tmp)); # .¤Ç¶èÀÚ¤é¤ì¤¿Éôʬ¤òÀÚ¤ê½Ð¤·
    $ToFile = $PreWord.$FromFileName; # ³ÈÄ¥»Ò°Ê³°¤ÎÉôʬ¤Þ¤Ç¤òºîÀ®
    
    $ImgNew = imagecreatetruecolor($re_size[0],$re_size[1]);
    
    switch($size[2]) {
        case "1": //gif·Á¼°
            if($tmp_w <= 1 && $tmp_h <= 1){
                if ( $newFileName ) {
                    $ToFile = $newFileName;
                } elseif  ($ext) {
                    $ToFile .= "." . $ext;
                } else {
                    $ToFile .= ".gif";
                }
                if(!@copy($FromImgPath , $ToImgPath.$ToFile)) { # ¥¨¥é¡¼½èÍý
                    return array(0,"¥Õ¥¡¥¤¥ë¤Î¥³¥Ô¡¼¤Ë¼ºÇÔ¤·¤Þ¤·¤¿¡£");
                }
                ImageDestroy($ImgNew);
                return array(1,$ToFile);
            }
                    
            ImageColorAllocate($ImgNew,255,235,214); //ÇØ·Ê¿§
            $black = ImageColorAllocate($ImgNew,0,0,0);
            $red = ImageColorAllocate($ImgNew,255,0,0);
            Imagestring($ImgNew,4,5,5,"GIF $size[0]x$size[1]", $red);
            ImageRectangle ($ImgNew,0,0,($re_size[0]-1),($re_size[1]-1),    $black);
            
            if ( $newFileName ) {
                $ToFile = $newFileName;
            } elseif($ext) {
                $ToFile .= "." . $ext;
            } else {
                $ToFile .= ".png";
            }
            $TmpPath = $ToImgPath.$ToFile;
            @Imagepng($ImgNew,$TmpPath);
            if(!@file_exists($TmpPath)){ # ²èÁü¤¬ºîÀ®¤µ¤ì¤Æ¤¤¤Ê¤¤¾ì¹ç
                return array(0,"²èÁü¤Î½ÐÎϤ˼ºÇÔ¤·¤Þ¤·¤¿¡£");
            }
            ImageDestroy($ImgNew);
            return array(1,$ToFile);
            
        case "2": //jpg·Á¼°
            $ImgDefault = ImageCreateFromJpeg($FromImgPath);
            //ImageCopyResized( $ImgNew,$ImgDefault, 0, 0, 0, 0,$re_size[0], $re_size[1],$size[0], $size[1]);
            ImageCopyResampled( $ImgNew,$ImgDefault, 0, 0, 0, 0,$re_size[0], $re_size[1],$size[0], $size[1]);

            if ( $newFileName ) {
                $ToFile = $newFileName;
            } elseif($ext) {
                $ToFile .= "." . $ext;
            } else {
                $ToFile .= ".jpg";
            }
            $TmpPath = $ToImgPath.$ToFile;
            @ImageJpeg($ImgNew,$TmpPath);
            if(!@file_exists($TmpPath)){ # ²èÁü¤¬ºîÀ®¤µ¤ì¤Æ¤¤¤Ê¤¤¾ì¹ç
                return array(0,"²èÁü¤Î½ÐÎϤ˼ºÇÔ¤·¤Þ¤·¤¿¡£<br>${ImgNew}<br>${TmpPath}");
            }
            $RetVal = $ToFile;
            break;
            
        case "3": //png·Á¼°
            $ImgDefault = ImageCreateFromPNG($FromImgPath);
            //ImageCopyResized($ImgNew, $ImgDefault, 0, 0, 0, 0,$re_size[0], $re_size[1],$size[0], $size[1]);
            ImageCopyResampled($ImgNew, $ImgDefault, 0, 0, 0, 0,$re_size[0], $re_size[1],$size[0], $size[1]);
            
            if ( $newFileName ) {
                $ToFile = $newFileName;
            } elseif ($ext) {
                $ToFile .= "." . $ext;
            } else {
                $ToFile .= ".png";
            }
            $TmpPath = $ToImgPath.$ToFile;
            @ImagePNG($ImgNew,$TmpPath );
            if(!@file_exists($TmpPath)){ # ²èÁü¤¬ºîÀ®¤µ¤ì¤Æ¤¤¤Ê¤¤¾ì¹ç
                return array(0,"²èÁü¤Î½ÐÎϤ˼ºÇÔ¤·¤Þ¤·¤¿¡£");
            }
            $RetVal = $ToFile;
            break;
    }
    
    ImageDestroy($ImgDefault);
    ImageDestroy($ImgNew);
    
    return array(1,$RetVal);
}
?>