php多功能图片处理类分享(php图片缩放类)

<?php   
/**  
*  基本图片处理，用于完成图片缩入，水印添加  
*  当水印图超过目标图片尺寸时，水印图能自动适应目标图片而缩小  
*  水印图可以设置跟背景的合并度 
*/   

/*  
使用方法:  
    自动裁切:  
    程序会按照图片的尺寸从中部裁切最大的正方形，并按目标尺寸进行缩略  

    $t--->setsrcimg("img/test.jpg");  
    $t->setcuttype(1);//这一句就ok了  
    $t->setdstimg("tmp/new_test.jpg");  
    $t->createimg(60,60);  

    手工裁切:  
    程序会按照指定的位置从源图上取图  

    $t->setsrcimg("img/test.jpg");  
    $t->setcuttype(2);//指明为手工裁切  
    $t->setsrccutposition(100, 100);// 源图起点坐标  
    $t->setrectanglecut(300, 200);// 裁切尺寸  
    $t->setdstimg("tmp/new_test.jpg");  
    $t->createimg(300,200);  
*/   
class thumbhandler   
{   
    var $dst_img;// 目标文件   
    var $h_src; // 图片资源句柄   
    var $h_dst;// 新图句柄   
    var $h_mask;// 水印句柄   
    var $img_create_quality = 100;// 图片生成质量   
    var $img_display_quality = 80;// 图片显示质量,默认为75   
    var $img_scale = 0;// 图片缩放比例   
    var $src_w = 0;// 原图宽度   
    var $src_h = 0;// 原图高度   
    var $dst_w = 0;// 新图总宽度   
    var $dst_h = 0;// 新图总高度   
    var $fill_w;// 填充图形宽   
    var $fill_h;// 填充图形高   
    var $copy_w;// 拷贝图形宽   
    var $copy_h;// 拷贝图形高   
    var $src_x = 0;// 原图绘制起始横坐标   
    var $src_y = 0;// 原图绘制起始纵坐标   
    var $start_x;// 新图绘制起始横坐标   
    var $start_y;// 新图绘制起始纵坐标   
    var $mask_word;// 水印文字   
    var $mask_img;// 水印图片   
    var $mask_pos_x = 0;// 水印横坐标   
    var $mask_pos_y = 0;// 水印纵坐标   
    var $mask_offset_x = 5;// 水印横向偏移   
    var $mask_offset_y = 5;// 水印纵向偏移   
    var $font_w;// 水印字体宽   
    var $font_h;// 水印字体高   
    var $mask_w;// 水印宽   
    var $mask_h;// 水印高   
    var $mask_font_color = "#ffffff";// 水印文字颜色   
    var $mask_font = 2;// 水印字体   
    var $font_size;// 尺寸   
    var $mask_position = 0;// 水印位置   
    var $mask_img_pct = 50;// 图片合并程度,值越大，合并程序越低   
    var $mask_txt_pct = 50;// 文字合并程度,值越小，合并程序越低   
    var $img_border_size = 0;// 图片边框尺寸   
    var $img_border_color;// 图片边框颜色   
    var $_flip_x=0;// 水平翻转次数   
    var $_flip_y=0;// 垂直翻转次数   

    var $cut_type=0;// 剪切类型   

    
    var $img_type;// 文件类型   

    // 文件类型定义,并指出了输出图片的函数   
    var $all_type = array(   
        "jpg"  => array("output"=>"imagejpeg"),   
        "gif"  => array("output"=>"imagegif"),   
        "png"  => array("output"=>"imagepng"),   
        "wbmp" => array("output"=>"image2wbmp"),   
        "jpeg" => array("output"=>"imagejpeg"));   

    /**  
     * 构造函数  
     */   
    function thumbhandler()   
    {   
        $this->mask_font_color = "#ffffff";   
        $this->font = 2;   
        $this->font_size = 12;   
    }   

    /**  
     * 取得图片的宽  
     */   
    function getimgwidth($src)   
    {   
        return imagesx($src);   
    }   

    /**  
     * 取得图片的高  
     */   
    function getimgheight($src)   
    {   
        return imagesy($src);   
    }   

    /**  
     * 设置图片生成路径  
     *  
     * @param    string    $src_img   图片生成路径  
     */   
    function setsrcimg($src_img, $img_type=null)   
    {   
        if(!file_exists($src_img))   
        {   
            die("图片不存在");   
        }   

        if(!empty($img_type))   
        {   
            $this->img_type = $img_type;   
        }   
        else   
        {   
            $this->img_type = $this->_getimgtype($src_img);   
        }   

        $this->_checkvalid($this->img_type);   

        // file_get_contents函数要求php版本>4.3.0   
        $src = '';   
        if(function_exists("file_get_contents"))   
        {   
            $src = file_get_contents($src_img);   
        }   
        else   
        {   
            $handle = fopen ($src_img, "r");   
            while (!feof ($handle))   
            {   
                $src .= fgets($fd, 4096);   
            }   
            fclose ($handle);   
        }   
        if(empty($src))   
        {   
            die("图片源为空");   
        }   
        $this->h_src = @imagecreatefromstring($src);   
        $this->src_w = $this->getimgwidth($this->h_src);   
        $this->src_h = $this->getimgheight($this->h_src);   
    }   

    /**  
     * 设置图片生成路径  
     *  
     * @param    string    $dst_img   图片生成路径  
     */   
    function setdstimg($dst_img)   
    {   
        $arr  = explode('/',$dst_img);   
        $last = array_pop($arr);   
        $path = implode('/',$arr);   
        $this->_mkdirs($path);   
        $this->dst_img = $dst_img;   
    }   

    /**  
     * 设置图片的显示质量  
     *  
     * @param    string      $n    质量  
     */   
    function setimgdisplayquality($n)   
    {   
        $this->img_display_quality = (int)$n;   
    }   

    /**  
     * 设置图片的生成质量  
     *  
     * @param    string      $n    质量  
     */   
    function setimgcreatequality($n)   
    {   
        $this->img_create_quality = (int)$n;   
    }   

    /**  
     * 设置文字水印  
     *  
     * @param    string     $word    水印文字  
     * @param    integer    $font    水印字体  
     * @param    string     $color   水印字体颜色  
     */   
    function setmaskword($word)   
    {   
        $this->mask_word .= $word;   
    }   

    /**  
     * 设置字体颜色  
     *  
     * @param    string     $color    字体颜色  
     */   
    function setmaskfontcolor($color="#ffffff")   
    {   
        $this->mask_font_color = $color;   
    }   

    /**  
     * 设置水印字体  
     *  
     * @param    string|integer    $font    字体  
     */   
    function setmaskfont($font=2)   
    {   
        if(!is_numeric($font) && !file_exists($font))   
        {   
            die("字体文件不存在");   
        }   
        $this->font = $font;   
    }   

    /**  
     * 设置文字字体大小,仅对truetype字体有效  
     */   
    function setmaskfontsize($size = "12")   
    {   
        $this->font_size = $size;   
    }   

    /**  
     * 设置图片水印  
     *  
     * @param    string    $img     水印图片源  
     */   
    function setmaskimg($img)   
    {   
        $this->mask_img = $img;   
    }   

    /**  
     * 设置水印横向偏移  
     *  
     * @param    integer     $x    横向偏移量  
     */   
    function setmaskoffsetx($x)   
    {   
        $this->mask_offset_x = (int)$x;   
    }   

    /**  
     * 设置水印纵向偏移  
     *  
     * @param    integer     $y    纵向偏移量  
     */   
    function setmaskoffsety($y)   
    {   
        $this->mask_offset_y = (int)$y;   
    }   

    /**  
     * 指定水印位置  
     *  
     * @param    integer     $position    位置,1:左上,2:左下,3:右上,0/4:右下  
     */   
    function setmaskposition($position=0)   
    {   
        $this->mask_position = (int)$position;   
    }   

    /**  
     * 设置图片合并程度  
     *  
     * @param    integer     $n    合并程度  
     */   
    function setmaskimgpct($n)   
    {   
        $this->mask_img_pct = (int)$n;   
    }   

    /**  
     * 设置文字合并程度  
     *  
     * @param    integer     $n    合并程度  
     */   
    function setmasktxtpct($n)   
    {   
        $this->mask_txt_pct = (int)$n;   
    }   

    /**  
     * 设置缩略图边框  
     *  
     * @param    (类型)     (参数名)    (描述)  
     */   
    function setdstimgborder($size=1, $color="#000000")   
    {   
        $this->img_border_size  = (int)$size;   
        $this->img_border_color = $color;   
    }   

    /**  
     * 水平翻转  
     */   
    function fliph()   
    {   
        $this->_flip_x++;   
    }   

    /**  
     * 垂直翻转  
     */   
    function flipv()   
    {   
        $this->_flip_y++;   
    }   

    /**  
     * 设置剪切类型  
     *  
     * @param    (类型)     (参数名)    (描述)  
     */   
    function setcuttype($type)   
    {   
        $this->cut_type = (int)$type;   
    }   

    /**  
     * 设置图片剪切  
     *  
     * @param    integer     $width    矩形剪切  
     */   
    function setrectanglecut($width, $height)   
    {   
        $this->fill_w = (int)$width;   
        $this->fill_h = (int)$height;   
    }   

    /**  
     * 设置源图剪切起始坐标点  
     *  
     * @param    (类型)     (参数名)    (描述)  
     */   
    function setsrccutposition($x, $y)   
    {   
        $this->src_x  = (int)$x;   
        $this->src_y  = (int)$y;   
    }   

    /**  
     * 创建图片,主函数  
     * @param    integer    $a     当缺少第二个参数时，此参数将用作百分比，  
     *                             否则作为宽度值  
     * @param    integer    $b     图片缩放后的高度  
     */   
    function createimg($a, $b=null)   
    {   
        $num = func_num_args();   
        if(1 == $num)   
        {   
            $r = (int)$a;   
            if($r < 1)   
            {   
                die("图片缩放比例不得小于1");   
            }   
            $this->img_scale = $r;   
            $this->_setnewimgsize($r);   
        }   

        if(2 == $num)   
        {   
            $w = (int)$a;   
            $h = (int)$b;   
            if(0 == $w)   
            {   
                die("目标宽度不能为0");   
            }   
            if(0 == $h)   
            {   
                die("目标高度不能为0");   
            }   
            $this->_setnewimgsize($w, $h);   
        }   

        if($this->_flip_x%2!=0)   
        {   
            $this->_fliph($this->h_src);   
        }   

        if($this->_flip_y%2!=0)   
        {   
            $this->_flipv($this->h_src);   
        }   
        $this->_createmask();   
        $this->_output();   

        // 释放   
        if(imagedestroy($this->h_src) && imagedestroy($this->h_dst))   
        {   
            return true;   
        }   
        else   
        {   
            return false;   
        }   
    }   

    /**  
     * 生成水印,调用了生成水印文字和水印图片两个方法  
     */   
    function _createmask()   
    {   
        if($this->mask_word)   
        {   
            // 获取字体信息   
            $this->_setfontinfo();   

            if($this->_isfull())   
            {   
                die("水印文字过大");   
            }   
            else   
            {   
                $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);   
                $white = imagecolorallocate($this->h_dst,255,255,255);   
                imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色   
                $this->_drawborder();   
                imagecopyresampled( $this->h_dst, $this->h_src,   
                                    $this->start_x, $this->start_y,   
                                    $this->src_x, $this->src_y,   
                                    $this->fill_w, $this->fill_h,   
                                    $this->copy_w, $this->copy_h);   
                $this->_createmaskword($this->h_dst);   
            }   
        }   

        if($this->mask_img)   
        {   
            $this->_loadmaskimg();//加载时，取得宽高   

            if($this->_isfull())   
            {   
                // 将水印生成在原图上再拷   
                $this->_createmaskimg($this->h_src);   
                $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);   
                $white = imagecolorallocate($this->h_dst,255,255,255);   
                imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色   
                $this->_drawborder();   
                imagecopyresampled( $this->h_dst, $this->h_src,   
                                    $this->start_x, $this->start_y,   
                                    $this->src_x, $this->src_y,   
                                    $this->fill_w, $this->start_y,   
                                    $this->copy_w, $this->copy_h);   
            }   
            else   
            {   
                // 创建新图并拷贝   
                $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);   
                $white = imagecolorallocate($this->h_dst,255,255,255);   
                imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色   
                $this->_drawborder();   
                imagecopyresampled( $this->h_dst, $this->h_src,   
                                    $this->start_x, $this->start_y,   
                                    $this->src_x, $this->src_y,   
                                    $this->fill_w, $this->fill_h,   
                                    $this->copy_w, $this->copy_h);   
                $this->_createmaskimg($this->h_dst);   
            }   
        }   

        if(empty($this->mask_word) && empty($this->mask_img))   
        {   
            $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);   
            $white = imagecolorallocate($this->h_dst,255,255,255);   
            imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色   
            $this->_drawborder();   

            imagecopyresampled( $this->h_dst, $this->h_src,   
                        $this->start_x, $this->start_y,   
                        $this->src_x, $this->src_y,   
                        $this->fill_w, $this->fill_h,   
                        $this->copy_w, $this->copy_h);   
        }   
    }   

    /**  
     * 画边框  
     */   
    function _drawborder()   
    {   
        if(!empty($this->img_border_size))   
        {   
            $c = $this->_parsecolor($this->img_border_color);   
            $color = imagecolorallocate($this->h_src,$c[0], $c[1], $c[2]);   
            imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$color);// 填充背景色   
        }   
    }   

    /**  
     * 生成水印文字  
     */   
    function _createmaskword($src)   
    {   
        $this->_countmaskpos();   
        $this->_checkmaskvalid();   

        $c = $this->_parsecolor($this->mask_font_color);   
        $color = imagecolorallocatealpha($src, $c[0], $c[1], $c[2], $this->mask_txt_pct);   

        if(is_numeric($this->font))   
        {   
            imagestring($src,   
                        $this->font,   
                        $this->mask_pos_x, $this->mask_pos_y,   
                        $this->mask_word,   
                        $color);   
        }   
        else   
        {   
            imagettftext($src,   
                        $this->font_size, 0,   
                        $this->mask_pos_x, $this->mask_pos_y,   
                        $color,   
                        $this->font,   
                        $this->mask_word);   
        }   
    }   

    /**  
     * 生成水印图  
     */   
    function _createmaskimg($src)   
    {   
        $this->_countmaskpos();   
        $this->_checkmaskvalid();   
        imagecopymerge($src,   
                        $this->h_mask,   
                        $this->mask_pos_x ,$this->mask_pos_y,   
                        0, 0,   
                        $this->mask_w, $this->mask_h,   
                        $this->mask_img_pct);   

        imagedestroy($this->h_mask);   
    }   

    /**  
     * 加载水印图  
     */   
    function _loadmaskimg()   
    {   
        $mask_type = $this->_getimgtype($this->mask_img);   
        $this->_checkvalid($mask_type);   

        // file_get_contents函数要求php版本>4.3.0   
        $src = '';   
        if(function_exists("file_get_contents"))   
        {   
            $src = file_get_contents($this->mask_img);   
        }   
        else   
        {   
            $handle = fopen ($this->mask_img, "r");   
            while (!feof ($handle))   
            {   
                $src .= fgets($fd, 4096);   
            }   
            fclose ($handle);   
        }   
        if(empty($this->mask_img))   
        {   
            die("水印图片为空");   
        }   
        $this->h_mask = imagecreatefromstring($src);   
        $this->mask_w = $this->getimgwidth($this->h_mask);   
        $this->mask_h = $this->getimgheight($this->h_mask);   
    }   

    /**  
     * 图片输出  
     */   
    function _output()   
    {   
        $img_type  = $this->img_type;   
        $func_name = $this->all_type[$img_type]['output'];   
        if(function_exists($func_name))   
        {   
            // 判断浏览器,若是ie就不发送头   
            if(isset($_server['http_user_agent']))   
            {   
                $ua = strtoupper($_server['http_user_agent']);   
                if(!preg_match('/^.*msie.*\)$/i',$ua))   
                {   
                    header("content-type:$img_type");   
                }   
            }   
            $func_name($this->h_dst, $this->dst_img, $this->img_display_quality);   
        }   
        else   
        {   
            return false;   
        }   
    }   

    /**  
     * 分析颜色  
     *  
     * @param    string     $color    十六进制颜色  
     */   
    function _parsecolor($color)   
    {   
        $arr = array();   
        for($ii=1; $ii<strlen function="" return="" this-="">_isfull())   
        {   
            switch($this->mask_position)   
            {   
                case 1:   
                    // 左上   
                    $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;   
                    $this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;   
                    break;   

                case 2:   
                    // 左下   
                    $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;   
                    $this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;   
                    break;   

                case 3:   
                    // 右上   
                    $this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;   
                    $this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;   
                    break;   

                case 4:   
                    // 右下   
                    $this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;   
                    $this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;   
                    break;   

                default:   
                    // 默认将水印放到右下,偏移指定像素   
                    $this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;   
                    $this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;   
                    break;   
            }   
        }   
        else   
        {   
            switch($this->mask_position)   
            {   
                case 1:   
                    // 左上   
                    $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;   
                    $this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;   
                    break;   

                case 2:   
                    // 左下   
                    $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;   
                    $this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;   
                    break;   

                case 3:   
                    // 右上   
                    $this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;   
                    $this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;   
                    break;   

                case 4:   
                    // 右下   
                    $this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;   
                    $this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;   
                    break;   

                default:   
                    // 默认将水印放到右下,偏移指定像素   
                    $this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;   
                    $this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;   
                    break;   
            }   
        }   
    }   

    /**  
     * 设置字体信息  
     */   
    function _setfontinfo()   
    {   
        if(is_numeric($this->font))   
        {   
            $this->font_w  = imagefontwidth($this->font);   
            $this->font_h  = imagefontheight($this->font);   

            // 计算水印字体所占宽高   
            $word_length   = strlen($this->mask_word);   
            $this->mask_w  = $this->font_w*$word_length;   
            $this->mask_h  = $this->font_h;   
        }   
        else   
        {   
            $arr = imagettfbbox ($this->font_size,0, $this->font,$this->mask_word);   
            $this->mask_w  = abs($arr[0] - $arr[2]);   
            $this->mask_h  = abs($arr[7] - $arr[1]);   
        }   
    }   

    /**  
     * 设置新图尺寸  
     *  
     * @param    integer     $img_w   目标宽度  
     * @param    integer     $img_h   目标高度  
     */   
    function _setnewimgsize($img_w, $img_h=null)   
    {   
        $num = func_num_args();   
        if(1 == $num)   
        {   
            $this->img_scale = $img_w;// 宽度作为比例   
            $this->fill_w = round($this->src_w * $this->img_scale / 100) - $this->img_border_size*2;   
            $this->fill_h = round($this->src_h * $this->img_scale / 100) - $this->img_border_size*2;   

            // 源文件起始坐标   
            $this->src_x  = 0;   
            $this->src_y  = 0;   
            $this->copy_w = $this->src_w;   
            $this->copy_h = $this->src_h;   

            // 目标尺寸   
            $this->dst_w   = $this->fill_w + $this->img_border_size*2;   
            $this->dst_h   = $this->fill_h + $this->img_border_size*2;   
        }   

        if(2 == $num)   
        {   
            $fill_w   = (int)$img_w - $this->img_border_size*2;   
            $fill_h   = (int)$img_h - $this->img_border_size*2;   
            if($fill_w < 0 || $fill_h < 0)   
            {   
                die("图片边框过大，已超过了图片的宽度");   
            }   
            $rate_w = $this->src_w/$fill_w;   
            $rate_h = $this->src_h/$fill_h;   

            switch($this->cut_type)   
            {   
                case 0:   
                    // 如果原图大于缩略图，产生缩小，否则不缩小   
                    if($rate_w < 1 && $rate_h < 1)   
                    {   
                        $this->fill_w = (int)$this->src_w;   
                        $this->fill_h = (int)$this->src_h;   
                    }   
                    else   
                    {   
                        if($rate_w >= $rate_h)   
                        {   
                            $this->fill_w = (int)$fill_w;   
                            $this->fill_h = round($this->src_h/$rate_w);   
                        }   
                        else   
                        {   
                            $this->fill_w = round($this->src_w/$rate_h);   
                            $this->fill_h = (int)$fill_h;   
                        }   
                    }   

                    $this->src_x  = 0;   
                    $this->src_y  = 0;   

                    $this->copy_w = $this->src_w;   
                    $this->copy_h = $this->src_h;   

                    // 目标尺寸   
                    $this->dst_w   = $this->fill_w + $this->img_border_size*2;   
                    $this->dst_h   = $this->fill_h + $this->img_border_size*2;   
                    break;   

                // 自动裁切   
                case 1:   
                    // 如果图片是缩小剪切才进行操作   
                    if($rate_w >= 1 && $rate_h >=1)   
                    {   
                        if($this->src_w > $this->src_h)   
                        {   
                            $src_x = round($this->src_w-$this->src_h)/2;   
                            $this->setsrccutposition($src_x, 0);   
                            $this->setrectanglecut($fill_h, $fill_h);   

                            $this->copy_w = $this->src_h;   
                            $this->copy_h = $this->src_h;   

                        }   
                        elseif($this->src_w < $this->src_h)   
                        {   
                            $src_y = round($this->src_h-$this->src_w)/2;   
                            $this->setsrccutposition(0, $src_y);   
                            $this->setrectanglecut($fill_w, $fill_h);   

                            $this->copy_w = $this->src_w;   
                            $this->copy_h = $this->src_w;   
                        }   
                        else   
                        {   
                            $this->setsrccutposition(0, 0);   
                            $this->copy_w = $this->src_w;   
                            $this->copy_h = $this->src_w;   
                            $this->setrectanglecut($fill_w, $fill_h);   
                        }   
                    }   
                    else   
                    {   
                        $this->setsrccutposition(0, 0);   
                        $this->setrectanglecut($this->src_w, $this->src_h);   

                        $this->copy_w = $this->src_w;   
                        $this->copy_h = $this->src_h;   
                    }   

                    // 目标尺寸   
                    $this->dst_w   = $this->fill_w + $this->img_border_size*2;   
                    $this->dst_h   = $this->fill_h + $this->img_border_size*2;   

                    break;   

                // 手工裁切   
                case 2:   
                    $this->copy_w = $this->fill_w;   
                    $this->copy_h = $this->fill_h;   

                    // 目标尺寸   
                    $this->dst_w   = $this->fill_w + $this->img_border_size*2;   
                    $this->dst_h   = $this->fill_h + $this->img_border_size*2;                  

                    break;   
                default:   
                    break;   

            }   
        }   

        // 目标文件起始坐标   
        $this->start_x = $this->img_border_size;   
        $this->start_y = $this->img_border_size;   
    }   

    /**  
     * 检查水印图是否大于生成后的图片宽高  
     */   
    function _isfull()   
    {   
        return (   $this->mask_w + $this->mask_offset_x > $this->fill_w   
                || $this->mask_h + $this->mask_offset_y > $this->fill_h)   
                   ?true:false;   
    }   

    /**  
     * 检查水印图是否超过原图  
     */   
    function _checkmaskvalid()   
    {   
        if(    $this->mask_w + $this->mask_offset_x > $this->src_w   
            || $this->mask_h + $this->mask_offset_y > $this->src_h)   
        {   
            die("水印图片尺寸大于原图，请缩小水印图");   
        }   
    }   

    /**  
     * 取得图片类型  
     *  
     * @param    string     $file_path    文件路径  
     */   
    function _getimgtype($file_path)   
    {   
        $type_list = array("1"=>"gif","2"=>"jpg","3"=>"png","4"=>"swf","5" => "psd","6"=>"bmp","15"=>"wbmp");   
        if(file_exists($file_path))   
        {   
            $img_info = @getimagesize ($file_path);   
            if(isset($type_list[$img_info[2]]))   
            {   
                return $type_list[$img_info[2]];   
            }   
        }   
        else   
        {   
            die("文件不存在,不能取得文件类型!");   
        }   
    }   

    /**  
     * 检查图片类型是否合法,调用了array_key_exists函数，此函数要求  
     * php版本大于4.1.0  
     *  
     * @param    string     $img_type    文件类型  
     */   
    function _checkvalid($img_type)   
    {   
        if(!array_key_exists($img_type, $this->all_type))   
        {   
            return false;   
        }   
    }   

    /**  
     * 按指定路径生成目录  
     *  
     * @param    string     $path    路径  
     */   
    function _mkdirs($path)   
    {   
        $adir = explode('/',$path);   
        $dirlist = '';   
        $rootdir = array_shift($adir);   
        if(($rootdir!='.'||$rootdir!='..')&&!file_exists($rootdir))   
        {   
            @mkdir($rootdir);   
        }   
        foreach($adir as $key=>$val)   
        {   
            if($val!='.'&&$val!='..')   
            {   
                $dirlist .= "/".$val;   
                $dirpath = $rootdir.$dirlist;   
                if(!file_exists($dirpath))   
                {   
                    @mkdir($dirpath);   
                    @chmod($dirpath,0777);   
                }   
            }   
        }   
    }   

    /**  
     * 垂直翻转  
     *  
     * @param    string     $src    图片源  
     */   
    function _flipv($src)   
    {   
        $src_x = $this->getimgwidth($src);   
        $src_y = $this->getimgheight($src);   

        $new_im = imagecreatetruecolor($src_x, $src_y);   
        for ($y = 0; $y < $src_y; $y++)   
        {   
            imagecopy($new_im, $src, 0, $src_y - $y - 1, 0, $y, $src_x, 1);   
        }   
        $this->h_src = $new_im;   
    }   

    /**  
     * 水平翻转  
     *  
     * @param    string     $src    图片源  
     */   
    function _fliph($src)   
    {   
        $src_x = $this->getimgwidth($src);   
        $src_y = $this->getimgheight($src);   

        $new_im = imagecreatetruecolor($src_x, $src_y);   
        for ($x = 0; $x < $src_x; $x++)   
        {   
            imagecopy($new_im, $src, $src_x - $x - 1, 0, $x, 0, 1, $src_y);   
        }   
        $this->h_src = $new_im;   
    }   
}   
?>

< ?php   
require_once('lib/thumb.class.php');   

$t = new thumbhandler();   

$t->setsrcimg("img/test.jpg");   
$t->setdstimg("tmp/new_test.jpg");   
$t->setmaskimg("img/test.gif");   
$t->setmaskposition(1);   
$t->setmaskimgpct(80);   
$t->setdstimgborder(4,"#dddddd");   

// 指定缩放比例   
$t->createimg(300,200);   
?> 

<?php   
require_once('lib/thumb.class.php');   

$t = new thumbhandler();   

// 基本使用   
$t--->setsrcimg("img/test.jpg");   
$t->setmaskword("test");   
$t->setdstimgborder(10,"#dddddd");   

// 指定缩放比例   
$t->createimg(50);   
?>

<?php   
equire_once('lib/thumb.class.php');   

$t = new thumbhandler();   

// 基本使用   
$t--->setsrcimg("img/test.jpg");   
$t->setmaskword("test");   

// 指定固定宽高   
$t->createimg(200,200);   
?>   

<?php   
require_once('lib/thumb.class.php');   

$t = new thumbhandler();   

$t--->setsrcimg("img/test.jpg");   
$t->setdstimg("tmp/new_test.jpg");   
$t->setmaskword("test");   

// 指定固定宽高   
$t->createimg(200,200);   
?>  

<?php   
require_once('lib/thumb.class.php');   

$t = new thumbhandler();   

$t--->setsrcimg("img/test.jpg");   

// 指定字体文件地址   
$t->setmaskfont("c:/winnt/fonts/arial.ttf");   
$t->setmaskfontsize(20);   
$t->setmaskfontcolor("#ffff00");   
$t->setmaskword("test3333333");   
$t->setdstimgborder(99,"#dddddd");   
$t->createimg(50);  
?>   

<?php   
require_once('lib/thumb.class.php');   

$t = new thumbhandler();   

$t->setsrcimg("img/test.jpg");   
$t->setmaskoffsetx(55);   
$t->setmaskoffsety(55);   
$t->setmaskposition(1);   
//$t->setmaskposition(2);   
//$t->setmaskposition(3);   
//$t->setmaskposition(4);   
$t->setmaskfontcolor("#ffff00");   
$t->setmaskword("test");   

// 指定固定宽高   
$t->createimg(50);   
?>   

<?php   
require_once('lib/thumb.class.php');   

$t = new thumbhandler();   

$t->setsrcimg("img/test.jpg");   
$t->setmaskfont("c:/winnt/fonts/simyou.ttf");   
$t->setmaskfontsize(20);   
$t->setmaskfontcolor("#ffffff");   
$t->setmasktxtpct(20);   
$t->setdstimgborder(10,"#dddddd");   
$text = "中文";   
$str = mb_convert_encoding($text, "utf-8", "gb2312");   
$t->setmaskword($str);   
$t->setmaskword("test");   

// 指定固定宽高   
$t->createimg(50);   
?> </strlen>