为百度UE编辑器上传图片添加水印功能

2024-05-04 23:34:20

字体：大中小

来源：转载

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前些日子把phpcms的内置编辑器改成了百度UE编辑器，非常好用，但是有个地方不是很满意，就是没法给上传的图片加水印了，经过一番研究终于实现了出来，分享给大家。

UEditor编辑器上传图片是自动提取的，但是图片没有水印功能，下面小编和各位一起来看看。

//图片加水印

public function watermark($source, $target = '', $w_pos = '', $w_img = '', $w_text = '99danji',$w_font = 8, $w_color = '#ff0000') {

  $this->w_img = 'watermark.png';

  $this->w_pos = 9;

  $this->w_minwidth = 400;

  $this->w_minheight = 200;

  $this->w_quality = 80;

  $this->w_pct = 85;



  $w_pos = $w_pos ? $w_pos : $this->w_pos;

  $w_img = $w_img ? $w_img : $this->w_img;

  //if(!$this->watermark_enable || !$this->check($source)) return false;

  if(!$target) $target = $source;

  //$w_img = PHPCMS_PATH.$w_img;

  //define('WWW_PATH', dirname(dirname(dirname(__FILE__)));

  $w_img = '../../../images/water/'.$w_img;

  $source_info = getimagesize($source);

  $source_w  = $source_info[0];

  $source_h  = $source_info[1];

  //if($source_w < $this->w_minwidth || $source_h < $this->w_minheight) return false;

  switch($source_info[2]) {

    case 1 :

      $source_img = imagecreatefromgif($source);

      break;

    case 2 :

      $source_img = imagecreatefromjpeg($source);

      break;

    case 3 :

      $source_img = imagecreatefrompng($source);

      break;

    default :

      return false;

  }

  if(!empty($w_img) && file_exists($w_img)) {

    $ifwaterimage = 1;

    $water_info  = getimagesize($w_img);

    $width    = $water_info[0];

    $height    = $water_info[1];

    switch($water_info[2]) {

      case 1 :

        $water_img = imagecreatefromgif($w_img);

        break;

      case 2 :

        $water_img = imagecreatefromjpeg($w_img);

        break;

      case 3 :

        $water_img = imagecreatefrompng($w_img);

        break;

      default :

        return;

    }

  } else {

    $ifwaterimage = 0;

    $temp = imagettfbbox(ceil($w_font*2.5), 0, PC_PATH.'libs/data/font/elephant.ttf', $w_text);

    $width = $temp[2] - $temp[6];

    $height = $temp[3] - $temp[7];

    unset($temp);

  }

  switch($w_pos) {

    case 1:

      $wx = 5;

      $wy = 5;

      break;

    case 2:

      $wx = ($source_w - $width) / 2;

      $wy = 0;

      break;

    case 3:

      $wx = $source_w - $width;

      $wy = 0;

      break;

    case 4:

      $wx = 0;

      $wy = ($source_h - $height) / 2;

      break;

    case 5:

      $wx = ($source_w - $width) / 2;

      $wy = ($source_h - $height) / 2;

      break;

    case 6:

      $wx = $source_w - $width;

   $wy = ($source_h - $height) / 2;

      break;

    case 7:

      $wx = 0;

      $wy = $source_h - $height;

      break;

    case 8:

      $wx = ($source_w - $width) / 2;

      $wy = $source_h - $height;

      break;

    case 9:

      $wx = $source_w - $width;

      $wy = $source_h - $height;

      break;

    case 10:

      $wx = rand(0,($source_w - $width));

      $wy = rand(0,($source_h - $height));

      break;

    default:

      $wx = rand(0,($source_w - $width));

      $wy = rand(0,($source_h - $height));

      break;

  }

  if($ifwaterimage) {

    if($water_info[2] == 3) {

      imagecopy($source_img, $water_img, $wx, $wy, 0, 0, $width, $height);

    } else {

      imagecopymerge($source_img, $water_img, $wx, $wy, 0, 0, $width, $height, $this->w_pct);

    }

  } else {

    if(!empty($w_color) && (strlen($w_color)==7)) {

      $r = hexdec(substr($w_color,1,2));

      $g = hexdec(substr($w_color,3,2));

      $b = hexdec(substr($w_color,5));

    } else {

      return;

    }

    imagestring($source_img,$w_font,$wx,$wy,$w_text,imagecolorallocate($source_img,$r,$g,$b));

  }



  switch($source_info[2]) {

    case 1 :

      imagegif($source_img, $target);

      break;

    case 2 :

      imagejpeg($source_img, $target, $this->w_quality);

      break;

    case 3 :

      imagepng($source_img, $target);

      break;

    default :

      return;

  }



  if(isset($water_info)) {

    unset($water_info);

  }

  if(isset($water_img)) {

    imagedestroy($water_img);

  }

  unset($source_info);

  imagedestroy($source_img);

  return true;

}



public function check($image) {

  return extension_loaded('gd') && preg_match("//.(jpg|jpeg|gif|png)/i", $image, $m) && file_exists($image) && function_exists('imagecreatefrom'.($m[1] == 'jpg' ? 'jpeg' : $m[1]));

}