• 主頁 > 技術知識 > PHP多功能圖片處理類
    setSrcImg("img/test.jpg");   
        $t->setCutType(1);//這一句就OK了   
        $t->setDstImg("tmp/new_test.jpg");   
        $t->createImg(60,60);   
        
        手工裁切:   
        程序會按照指定的位置從源圖上取圖   
        
        $t->setSrcImg("img/test.jpg");   
        $t->setCutType(2);//指明為手工裁切   
        $t->setSrcCutPosition(100, 100);// 源圖起點坐標   
        $t->setRectangleCut(300, 200);// 裁切尺寸   
        $t->setDstImg("tmp/new_test.jpg");   
        $t->createImg(300,200);   
    */    
    class ThumbHandler    
    {    
        var $dst_img;// 目標文件    
        var $h_src; // 圖片資源句柄    
        var $h_dst;// 新圖句柄    
        var $h_mask;// 水印句柄    
        var $img_create_quality = 100;// 圖片生成質量    
        var $img_display_quality = 80;// 圖片顯示質量,默認為75    
        var $img_scale = 0;// 圖片縮放比例    
        var $src_w = 0;// 原圖寬度    
        var $src_h = 0;// 原圖高度    
        var $dst_w = 0;// 新圖總寬度    
        var $dst_h = 0;// 新圖總高度    
        var $fill_w;// 填充圖形寬    
        var $fill_h;// 填充圖形高    
        var $copy_w;// 拷貝圖形寬    
        var $copy_h;// 拷貝圖形高    
        var $src_x = 0;// 原圖繪制起始橫坐標    
        var $src_y = 0;// 原圖繪制起始縱坐標    
        var $start_x;// 新圖繪制起始橫坐標    
        var $start_y;// 新圖繪制起始縱坐標    
        var $mask_word;// 水印文字    
        var $mask_img;// 水印圖片    
        var $mask_pos_x = 0;// 水印橫坐標    
        var $mask_pos_y = 0;// 水印縱坐標    
        var $mask_offset_x = 5;// 水印橫向偏移    
        var $mask_offset_y = 5;// 水印縱向偏移    
        var $font_w;// 水印字體寬    
        var $font_h;// 水印字體高    
        var $mask_w;// 水印寬    
        var $mask_h;// 水印高    
        var $mask_font_color = "#ffffff";// 水印文字顏色    
        var $mask_font = 2;// 水印字體    
        var $font_size;// 尺寸    
        var $mask_position = 0;// 水印位置    
        var $mask_img_pct = 50;// 圖片合并程度,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;// 圖片邊框尺寸    
        var $img_border_color;// 圖片邊框顏色    
        var $_flip_x=0;// 水平翻轉次數    
        var $_flip_y=0;// 垂直翻轉次數    
         
        var $cut_type=0;// 剪切類型    
         
         
        var $img_type;// 文件類型    
         
        // 文件類型定義,并指出了輸出圖片的函數    
        var $all_type = array(    
            "jpg"  => array("output"=>"imagejpeg"),    
            "gif"  => array("output"=>"imagegif"),    
            "png"  => array("output"=>"imagepng"),    
            "wbmp" => array("output"=>"image2wbmp"),    
            "jpeg" => array("output"=>"imagejpeg"));    
         
        /**   
         * 構造函數   
         */    
        function ThumbHandler()    
        {    
            $this->mask_font_color = "#ffffff";    
            $this->font = 2;    
            $this->font_size = 12;    
        }    
         
        /**   
         * 取得圖片的寬   
         */    
        function getImgWidth($src)    
        {    
            return imagesx($src);    
        }    
         
        /**   
         * 取得圖片的高   
         */    
        function getImgHeight($src)    
        {    
            return imagesy($src);    
        }    
         
        /**   
         * 設置圖片生成路徑   
         *   
         * @param    string    $src_img   圖片生成路徑   
         */    
        function setSrcImg($src_img, $img_type=null)    
        {    
            if(!file_exists($src_img))    
            {    
                die("圖片不存在");    
            }    
                
            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函數要求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("圖片源為空");    
            }    
            $this->h_src = @ImageCreateFromString($src);    
            $this->src_w = $this->getImgWidth($this->h_src);    
            $this->src_h = $this->getImgHeight($this->h_src);    
        }    
         
        /**   
         * 設置圖片生成路徑   
         *   
         * @param    string    $dst_img   圖片生成路徑   
         */    
        function setDstImg($dst_img)    
        {    
            $arr  = explode('/',$dst_img);    
            $last = array_pop($arr);    
            $path = implode('/',$arr);    
            $this->_mkdirs($path);    
            $this->dst_img = $dst_img;    
        }    
         
        /**   
         * 設置圖片的顯示質量   
         *   
         * @param    string      $n    質量   
         */    
        function setImgDisplayQuality($n)    
        {    
            $this->img_display_quality = (int)$n;    
        }    
         
        /**   
         * 設置圖片的生成質量   
         *   
         * @param    string      $n    質量   
         */    
        function setImgCreateQuality($n)    
        {    
            $this->img_create_quality = (int)$n;    
        }    
         
        /**   
         * 設置文字水印   
         *   
         * @param    string     $word    水印文字   
         * @param    integer    $font    水印字體   
         * @param    string     $color   水印字體顏色   
         */    
        function setMaskWord($word)    
        {    
            $this->mask_word .= $word;    
        }    
         
        /**   
         * 設置字體顏色   
         *   
         * @param    string     $color    字體顏色   
         */    
        function setMaskFontColor($color="#ffffff")    
        {    
            $this->mask_font_color = $color;    
        }    
         
        /**   
         * 設置水印字體   
         *   
         * @param    string|integer    $font    字體   
         */    
        function setMaskFont($font=2)    
        {    
            if(!is_numeric($font) && !file_exists($font))    
            {    
                die("字體文件不存在");    
            }    
            $this->font = $font;    
        }    
         
        /**   
         * 設置文字字體大小,僅對truetype字體有效   
         */    
        function setMaskFontSize($size = "12")    
        {    
            $this->font_size = $size;    
        }    
         
        /**   
         * 設置圖片水印   
         *   
         * @param    string    $img     水印圖片源   
         */    
        function setMaskImg($img)    
        {    
            $this->mask_img = $img;    
        }    
         
        /**   
         * 設置水印橫向偏移   
         *   
         * @param    integer     $x    橫向偏移量   
         */    
        function setMaskOffsetX($x)    
        {    
            $this->mask_offset_x = (int)$x;    
        }    
         
        /**   
         * 設置水印縱向偏移   
         *   
         * @param    integer     $y    縱向偏移量   
         */    
        function setMaskOffsetY($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;    
        }    
         
        /**   
         * 設置圖片合并程度   
         *   
         * @param    integer     $n    合并程度   
         */    
        function setMaskImgPct($n)    
        {    
            $this->mask_img_pct = (int)$n;    
        }    
         
        /**   
         * 設置文字合并程度   
         *   
         * @param    integer     $n    合并程度   
         */    
        function setMaskTxtPct($n)    
        {    
            $this->mask_txt_pct = (int)$n;    
        }    
         
        /**   
         * 設置縮略圖邊框   
         *   
         * @param    (類型)     (參數名)    (描述)   
         */    
        function setDstImgBorder($size=1, $color="#000000")    
        {    
            $this->img_border_size  = (int)$size;    
            $this->img_border_color = $color;    
        }    
         
        /**   
         * 水平翻轉   
         */    
        function flipH()    
        {    
            $this->_flip_x++;    
        }    
         
        /**   
         * 垂直翻轉   
         */    
        function flipV()    
        {    
            $this->_flip_y++;    
        }    
         
        /**   
         * 設置剪切類型   
         *   
         * @param    (類型)     (參數名)    (描述)   
         */    
        function setCutType($type)    
        {    
            $this->cut_type = (int)$type;    
        }    
         
        /**   
         * 設置圖片剪切   
         *   
         * @param    integer     $width    矩形剪切   
         */    
        function setRectangleCut($width, $height)    
        {    
            $this->fill_w = (int)$width;    
            $this->fill_h = (int)$height;    
        }    
         
        /**   
         * 設置源圖剪切起始坐標點   
         *   
         * @param    (類型)     (參數名)    (描述)   
         */    
        function setSrcCutPosition($x, $y)    
        {    
            $this->src_x  = (int)$x;    
            $this->src_y  = (int)$y;    
        }    
         
        /**   
         * 創建圖片,主函數   
         * @param    integer    $a     當缺少第二個參數時,此參數將用作百分比,   
         *                             否則作為寬度值   
         * @param    integer    $b     圖片縮放后的高度   
         */    
        function createImg($a, $b=null)    
        {    
            $num = func_num_args();    
            if(1 == $num)    
            {    
                $r = (int)$a;    
                if($r < 1)    
                {    
                    die("圖片縮放比例不得小于1");    
                }    
                $this->img_scale = $r;    
                $this->_setNewImgSize($r);    
            }    
         
            if(2 == $num)    
            {    
                $w = (int)$a;    
                $h = (int)$b;    
                if(0 == $w)    
                {    
                    die("目標寬度不能為0");    
                }    
                if(0 == $h)    
                {    
                    die("目標高度不能為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();    
         
            // 釋放    
            if(imagedestroy($this->h_src) && imagedestroy($this->h_dst))    
            {    
                Return true;    
            }    
            else    
            {    
                Return false;    
            }    
        }    
         
        /**   
         * 生成水印,調用了生成水印文字和水印圖片兩個方法   
         */    
        function _createMask()    
        {    
            if($this->mask_word)    
            {    
                // 獲取字體信息    
                $this->_setFontInfo();    
         
                if($this->_isFull())    
                {    
                    die("水印文字過大");    
                }    
                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();//加載時,取得寬高    
         
                if($this->_isFull())    
                {    
                    // 將水印生成在原圖上再拷    
                    $this->_createMaskImg($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    
                {    
                    // 創建新圖并拷貝    
                    $this->h_dst = imagecreatetruecolor($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);    
            }    
        }    
         
        /**   
         * 畫邊框   
         */    
        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);    
            }    
        }    
         
        /**   
         * 生成水印圖   
         */    
        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);    
        }    
         
        /**   
         * 加載水印圖   
         */    
        function _loadMaskImg()    
        {    
            $mask_type = $this->_getImgType($this->mask_img);    
            $this->_checkValid($mask_type);    
         
            // file_get_contents函數要求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("水印圖片為空");    
            }    
            $this->h_mask = ImageCreateFromString($src);    
            $this->mask_w = $this->getImgWidth($this->h_mask);    
            $this->mask_h = $this->getImgHeight($this->h_mask);    
        }    
         
        /**   
         * 圖片輸出   
         */    
        function _output()    
        {    
            $img_type  = $this->img_type;    
            $func_name = $this->all_type[$img_type]['output'];    
            if(function_exists($func_name))    
            {    
                // 判斷瀏覽器,若是IE就不發送頭    
                if(isset($_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;    
            }    
        }    
         
        /**   
         * 分析顏色   
         *   
         * @param    string     $color    十六進制顏色   
         */    
        function _parseColor($color)    
        {    
            $arr = array();    
            for($ii=1; $ii_isFull())    
            {    
                switch($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:    
                        // 默認將水印放到右下,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:    
                        // 默認將水印放到右下,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;    
                }    
            }    
        }    
         
        /**   
         * 設置字體信息   
         */    
        function _setFontInfo()    
        {    
            if(is_numeric($this->font))    
            {    
                $this->font_w  = imagefontwidth($this->font);    
                $this->font_h  = imagefontheight($this->font);    
         
                // 計算水印字體所占寬高    
                $word_length   = strlen($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]);    
            }    
        }    
         
        /**   
         * 設置新圖尺寸   
         *   
         * @param    integer     $img_w   目標寬度   
         * @param    integer     $img_h   目標高度   
         */    
        function _setNewImgSize($img_w, $img_h=null)    
        {    
            $num = func_num_args();    
            if(1 == $num)    
            {    
                $this->img_scale = $img_w;// 寬度作為比例    
                $this->fill_w = round($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;    
         
                // 源文件起始坐標    
                $this->src_x  = 0;    
                $this->src_y  = 0;    
                $this->copy_w = $this->src_w;    
                $this->copy_h = $this->src_h;    
         
                // 目標尺寸    
                $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("圖片邊框過大,已超過了圖片的寬度");    
                }    
                $rate_w = $this->src_w/$fill_w;    
                $rate_h = $this->src_h/$fill_h;    
         
                switch($this->cut_type)    
                {    
                    case 0:    
                        // 如果原圖大于縮略圖,產生縮小,否則不縮小    
                        if($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;    
         
                        // 目標尺寸    
                        $this->dst_w   = $this->fill_w + $this->img_border_size*2;    
                        $this->dst_h   = $this->fill_h + $this->img_border_size*2;    
                        break;    
         
                    // 自動裁切    
                    case 1:    
                        // 如果圖片是縮小剪切才進行操作    
                        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;    
                        }    
         
                        // 目標尺寸    
                        $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;    
         
                        // 目標尺寸    
                        $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;    
         
                }    
            }    
         
            // 目標文件起始坐標    
            $this->start_x = $this->img_border_size;    
            $this->start_y = $this->img_border_size;    
        }    
         
        /**   
         * 檢查水印圖是否大于生成后的圖片寬高   
         */    
        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;    
        }    
         
        /**   
         * 檢查水印圖是否超過原圖   
         */    
        function _checkMaskValid()    
        {    
            if(    $this->mask_w + $this->mask_offset_x > $this->src_w    
                || $this->mask_h + $this->mask_offset_y > $this->src_h)    
            {    
                die("水印圖片尺寸大于原圖,請縮小水印圖");    
            }    
        }    
         
        /**   
         * 取得圖片類型   
         *   
         * @param    string     $file_path    文件路徑   
         */    
        function _getImgType($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,不能取得文件類型!");    
            }    
        }    
         
        /**   
         * 檢查圖片類型是否合法,調用了array_key_exists函數,此函數要求   
         * php版本大于4.1.0   
         *   
         * @param    string     $img_type    文件類型   
         */    
        function _checkValid($img_type)    
        {    
            if(!array_key_exists($img_type, $this->all_type))    
            {    
                Return false;    
            }    
        }    
         
        /**   
         * 按指定路徑生成目錄   
         *   
         * @param    string     $path    路徑   
         */    
        function _mkdirs($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);    
                    }    
                }    
            }    
        }    
         
        /**   
         * 垂直翻轉   
         *   
         * @param    string     $src    圖片源   
         */    
        function _flipV($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;    
        }    
         
        /**   
         * 水平翻轉   
         *   
         * @param    string     $src    圖片源   
         */    
        function _flipH($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;    
        }    
    }    
    ?>
    
    函數描述及例子
     
    使用實例:    
         
    < ?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");    
         
    // 指定縮放比例    
    $t->createImg(300,200);    
    ?>    
    setSrcImg("img/test.jpg");    
    $t->setMaskWord("test");    
    $t->setDstImgBorder(10,"#dddddd");    
         
    // 指定縮放比例    
    $t->createImg(50);    
    ?>    
    setSrcImg("img/test.jpg");    
    $t->setMaskWord("test");    
         
    // 指定固定寬高    
    $t->createImg(200,200);    
    ?>    
    setSrcImg("img/test.jpg");    
    $t->setDstImg("tmp/new_test.jpg");    
    $t->setMaskWord("test");    
         
    // 指定固定寬高    
    $t->createImg(200,200);    
    ?>    
    setSrcImg("img/test.jpg");    
         
    // 指定字體文件地址    
    $t->setMaskFont("c:/winnt/fonts/arial.ttf");    
    $t->setMaskFontSize(20);    
    $t->setMaskFontColor("#ffff00");    
    $t->setMaskWord("test3333333");    
    $t->setDstImgBorder(99,"#dddddd");    
    $t->createImg(50);    
         
    ?>    
    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");    
         
    // 指定固定寬高    
    $t->createImg(50);    
    ?>    
    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");    
         
    // 指定固定寬高    
    $t->createImg(50);    
    ?> 

      

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