php 打包gd 庫

php 封裝gd 庫

使用sae 版 thinkphp 在本地和sae 上無法實現縮圖，縮圖主要使用在瀑布流上面，不然一張圖片2 3 M，速度太慢，就自己封裝了一個，見笑！

class Thumb{    // 設定最大寬度，用來在編輯器中使用和顯示    private  $max_width  = null;    private  $file_name  = null;    private  $water_name = null;    //獲得檔案名稱和圖片寬度    public function __construct($max_widht,$file_name,$water_name) {        $this->max_width  = $max_widht;        $this->file_name  = $file_name;        $this->water_name = $water_name;    }    public function create_image(){        // 獲得ori圖片資訊        list($width,$height,$type) = getimagesize($this->file_name);              // 當原有圖片大於 要求的最大寬度時，才需要進行壓縮        if($width > $this->max_width){            // 獲得圖片壓縮百分比            $per = $this->max_width / $width;            $new_width = $width * $per;            $new_height = $height * $per;                  }else{            $new_height =  $height;            $new_width  =  $width;        }        //建立一個真彩色映像        $image_p = imagecreatetruecolor($new_width, $new_height -10);        $image = $this->image_obj($type,  $this->file_name);         imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);        $this->image_dump($type, $image_p, $this->file_name);        $this->water();    }    /*     * 產生為圖片添加浮水印     */    private function water(){        $water_name = $this->water_name;        $dist_name = $this->file_name;        list($dist_width,$dist_height,$type) = getimagesize($dist_name);        $dist_im   = $this->image_obj($type, $this->file_name);        $water_name = "D:/xampps/htdocs/buyingfeiblog/1/App/Modules/Admin/Tpl/Public/Images/water.png";        list($w_width,$w_height) = getimagesize($water_name); // 獲得圖片浮水印資訊        $water_src =  imagecreatefrompng($water_name);        // 設定圖片浮水印位置 在右下角        $x = ($dist_width - $w_width) / 4 * 3 ;        $y =($dist_height - $w_height) /4 * 3 ;        if(imagecopy($dist_im, $water_src, $x, $y, 0, 0, $w_width, $w_height)){            imagepng($dist_im,$dist_name);            echo "success";        }else{            echo "error";        }    }    // 產生圖片類型，產生不同圖片 保持圖片原本類型不發生變化    private function image_dump($type,$image_p,$filename){         switch ($type){            case 1:                imagegif($image_p, $filename);                $dis_im = imagecreatefromgif(file_name);                break;            case 2:                imagejpeg($image_p,  $this->file_name);                $dis_im = imagecreatefromjpeg(file_name);                 break;            case 3:                imagepng($image_p,file_name);                $dis_im = imagecreatefrompng(file_name);                break;            default :        }    }    // 根據圖片不同，產生不同資來源物件    private function image_obj($type,$filename){         switch ($type){//          1 = GIF，2 = JPG，3 = PNG，            case 1:               $image =   imagecreatefromgif($filename);              break;            case 2:               $image =   imagecreatefromjpeg($filename);              break;            case 3:               $image =   imagecreatefrompng($filename);               break;            default :        }        return $image;    }}    $thumb = new  Thumb(725,"D:/xampps/htdocs/test/test.jpg");    $thumb->create_image();//create_image?>

就是這麼簡單，
主要包括產生真彩圖，
建立繪圖物件資源
圖片進行合并，ok！

