PHP的產生圖片或文字浮水印的類____PHP

<?php/***********************************************************類名：ImageWatermark功能：用於產生圖片或文字浮水印************************************************************合成浮水印：1、映像浮水印appendImageMark(暫不可旋轉)2、文字浮水印appendTextMark(漢字浮水印需要設定漢字字型)（可旋轉）輸出浮水印映像：write($filename=null)1、輸出到檔案：指定$filename參數為輸出的檔案名稱。2、輸出到瀏覽器：不指定輸出檔案名，則輸出到瀏覽器.指定浮水印位置：1、指定位置類型$markPosType:(default-0)1-top left     2-top center     3-top right4-middle left  5-middle center  6-middle right7-bottom left  8-bottom center  9-bottom right0-random2、設定具體位置setMarkPos($x,$y)，若指定具體位置，則上面的位置類型無效。*************************************************************/class ImageWatermark{    public $markPosType = 0;          //浮水印位置，預設為隨機位置輸出浮水印    public $fontFile = 'arial.ttf';   //字型檔名    public $color = '#CCCCCC';        //浮水印字型的顏色    public $fontSize = 12;            //浮水印字型大小    public $angle = 0;                //浮水印文字旋轉的角度    private $markPos = array();    private $markImageFile = null, $destImageFile = null;    private $mark_res = null, $mark_width = 0, $mark_height = 0, $mark_type = null;    private $dest_res = null, $dest_width = 0, $dest_height = 0, $dest_type = null;    //用靶心圖表片作為建構函式的參數    public function __construct($destImage){        if(!file_exists($destImage)) return false;        $this->destImageFile=$destImage;        //擷取圖片大小、類型        $imageInfo = getimagesize($this->destImageFile);        $this->dest_width = $imageInfo[0];$this->dest_height = $imageInfo[1];$this->dest_type = $imageInfo[2];        //得到圖片資源控制代碼        $this->dest_res = $this->getImageResource($this->destImageFile,$this->dest_type);    }    public function __destruct(){        imagedestroy($this->dest_res);    }    //添加文字浮水印    public function appendTextMark($markText){        if($markText==null) return false;        //計算浮水印文本的大小        $box = imagettfbbox($this->fontSize,$this->angle,$this->fontFile,$markText);        $this->mark_width = $box[2]-$box[6];        $this->mark_height = $box[3]-$box[7];        //計算浮水印位置        $pos = ($this->markPos!=null)?$this->markPos:$this->getMarkPosition($this->markPosType);        $pos[1]+=$this->mark_height;        //將文字列印到圖片上        $RGB=$this->colorHexRgb($this->color);        $imageColor=imagecolorallocate($this->dest_res,$RGB[0],$RGB[1],$RGB[2]);        imagettftext($this->dest_res,$this->fontSize,$this->angle,$pos[0],$pos[1],$imageColor,$this->fontFile,$markText);    }    //添加圖片浮水印    public function appendImageMark($markImage){        if(!file_exists($markImage)) return false;        $this->markImageFile=$markImage;        //擷取浮水印圖片大小、類型        $imageInfo = getimagesize($this->markImageFile);        $this->mark_width = $imageInfo[0];$this->mark_height = $imageInfo[1];$this->mark_type = $imageInfo[2];        //得到圖片資源控制代碼        $this->mark_res = $this->getImageResource($this->markImageFile,$this->mark_type);        //計算浮水印位置        $pos = ($this->markPos!=null)?$this->markPos:$this->getMarkPosition($this->markPosType);        //設定映像混色模式        imagealphablending($this->dest_res, true);        //複製疊加映像        imagecopy($this->dest_res,$this->mark_res,$pos[0],$pos[1],0,0,$this->mark_width,$this->mark_height);        imagedestroy($this->mark_res);    }    //將疊加浮水印後的圖片寫入指定檔案，若不定檔案名稱，則輸出到瀏覽器    public function write($filename=null){        $this->writeImage($this->dest_res,$filename,$this->dest_type);    }    //設定浮水印x,y座標    public function setMarkPos($x,$y){        $this->markPos[0]=$x; $this->markPos[1]=$y;    }    //將十六進位的顏色值分解成RGB形式    private function colorHexRgb($color){        $color = preg_replace('/#/','',$color);        $R=hexdec($color[0].$color[1]);        $G=hexdec($color[2].$color[3]);        $B=hexdec($color[4].$color[5]);        return array($R,$G,$B);    }    //計算浮水印位置    private function getMarkPosition($type=0){        switch($type){            case 0: $x = rand(0,$this->dest_width-$this->mark_width);                    $y = rand(0,$this->dest_height-$this->mark_height);                    break;//random            case 1: $x = 0;                    $y = 0;                    break;//topleft            case 2: $x = ($this->dest_width-$this->mark_width)/2;                    $y = 0;                    break; //topcenter            case 3: $x = $this->dest_width-$this->mark_width;                    $y = 0;                    break;// topright            case 4: $x = 0;                    $y = ($this->dest_height-$this->mark_height)/2;                    break;//middleleft            case 5: $x = ($this->dest_width-$this->mark_width)/2;                    $y = ($this->dest_height-$this->mark_height)/2;                    break;//middlecenter            case 6: $x = $this->dest_width-$this->mark_width;                    $y = ($this->dest_height-$this->mark_height)/2;                    break;//middleright            case 7: $x = 0; $y = $this->dest_height-$this->mark_height;                    break;//bottomleft            case 8: $x = ($this->dest_width-$this->mark_width)/2;                    $y = $this->dest_height-$this->mark_height;                    break;//bottomcenter            case 9: $x = $this->dest_width-$this->mark_width;                    $y = $this->dest_height-$this->mark_height;                    break;//bottomright            default:$x = rand(0,$this->dest_width-$this->mark_width);                    $y = rand(0,$this->dest_height-$this->mark_height);                    break;//random        }        return array($x,$y);    }    //從一個影像檔中取得圖片資源標識符    private function getImageResource($filename,$type=0){        switch($type){            case 1:return imagecreatefromgif($filename);break;            case 2:return imagecreatefromjpeg($filename);break;            case 3:return imagecreatefrompng($filename);break;            // 以後可添加其它格式            default:return null;        }    }    //將映像寫入檔案或輸出到瀏覽器    private function writeImage($ImageRes,$filename=null,$type=0){        switch($type) {            case 1:imagegif($ImageRes,$filename);break;            case 2:imagejpeg($ImageRes,$filename);break;            case 3:imagepng($ImageRes,$filename);break;            default:return null;        }        return true;    }}//使用樣本$markimg = new ImageWatermark('c_si.jpg');//$markimg->setMarkPos(100,200);//如何設定setMarkPos,則markPosType無效。$markimg->markPosType=5;$markimg->appendImageMark('mark.png');$markimg->fontFile='STCAIYUN.TTF';$markimg->color='#FFFFFF';$markimg->fontSize=24;$markimg->angle=45;//設定角度時，注意浮水印可能旋轉出靶心圖表片之外。$markimg->appendTextMark('漢字浮水印');$markimg->write();$markimg=null;?>