PHP method to add watermarks at different locations according to the color boundary of the image, _PHP tutorial

How PHP adds watermarks at different locations based on the color boundary of the image,

This article describes the example of PHP adding watermarks at different locations based on the color boundary of the image. Share it with everyone for your reference. The specific implementation method is as follows:

function add_wm($nmw_water, $src_file, $output_file, $x, $y) {    
    if(file_exists($output_file))    
      return;    
    $w1 = MagickGetImageWidth($nmw_water);    
    $h1 = MagickGetImageHeight($nmw_water);    
    $nmw =NewMagickWand();    
    MagickReadImage($nmw, $src_file);    
    // 默认的加水印位置调整    
    $lt_w = 50;    
    $lt_h = 50;    
    if($x == 0){    
      $w = MagickGetImageWidth($nmw);    
      $h = MagickGetImageHeight($nmw);    
      $x = $w;    
      $y = $h;    
    }else{    
      // 根据具体情况调整    
      $lt_w = 30;    
      $lt_h = 40;    
    }    
    MagickCompositeImage($nmw, $nmw_water, MW_OverCompositeOp, $x - $w1 - $lt_w, $y - $h1 - $lt_h);    
    MagickWriteImage($nmw, $output_file);    
    DestroyMagickWand($nmw);        
  }    
  // 还是groovy的eachFileRecurse好用啊    
  function add_wm_recurse($nmw_water, $to_dir, $output_dir, $arr) {
    $dp = dir($to_dir);    
    while($file=$dp->read()){    
      if($file != '.' && $file != '..'){    
        if(is_dir($to_dir . '/' . $file)){    
          mkdir($output_dir . '/' . $file);    
          add_wm_recurse($nmw_water, $to_dir . '/' . $file, $output_dir . '/' . $file, $arr);    
        }else{    
          if(!array_key_exists($to_dir . '/' . $file, $arr)){
            continue;    
          }    
          $sub_arr = $arr[$to_dir . '/' . $file];    
          if($sub_arr){    
            $x = intval($sub_arr[0]);    
            $y = intval($sub_arr[1]);    
            add_wm($nmw_water, $to_dir . '/' . $file, $output_dir . '/' . $file, $x, $y);    
          }    
        }    
      }    
    }    
    $dp->close();    
  }    
  $to_dir = './resized';    
  $output_dir = './output';    
  // 这个是我用java的ImageIO遍历图片像素获取的符合裤子颜色的区域的坐标array(posX, posY)    
  $arr = array(    
    array(50, 50)    
  );    
  $water = './water.png';    
  $nmw_water =NewMagickWand();    
  MagickReadImage($nmw_water, $water);    
  add_wm_recurse($nmw_water, $to_dir, $output_dir, $arr);    
  DestroyMagickWand($nmw_water);

I hope this article will be helpful to everyone’s PHP programming design.

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