图片缩略水印类代码,PHP代码库,德仔网

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【PHP】图片缩略水印类
作者:qita.in / 发布于2012/10/22/ 479
图片缩略水印类
<div>/**</div>
<div>* 图片缩放水印类</div>
<div>*</div>
<div> * @version 1.0 ;</div>
<div>*</div>
<div>*/</div>
<div>class cls_photo</div>
<div>{</div>
<div>  protected $waterrate = 0.2; //水印图标在图片上的比例</div>
<div>  protected $width = 300; //缩略图默认宽度</div>
<div>  protected $height = 200; //缩略图默认高度</div>
<div>  protected $padding = 5; //水印图到边的距离</div>
<div>  protected $water_mark = "./water.png";</div>
<div>  protected $water_mark_pos = 5;//水印图片位置（1=左上角，2=右上角，3=左下角,4=右下角,5中央）</div>
<div>  protected $watermode = 0;// 0缩略图时不打水印 1缩略图时打水印</div>
<div>  protected $magick_handle;//图片操作句柄</div>
<div>  protected $format = array('jpg','gif','png','jpeg'); // 图片文件格式限定</div>
<div>  protected $smallpic_mode = 2;//默认模式 0为不生成缩略图， 1为裁切缩放 ，2为比例缩放 3为缩放填充模式</div>
<div></div>
<div>  /**</div>
<div>  * 设置图片类参数</div>
<div>  *</div>
<div>  * @param $arg 图片参数 多次可放入数组里 如下</div>
<div>  * @param $protected 参数值</div>
<div>  * array(</div>
<div>  *   'waterrate'=>0.2,</div>
<div>  *   'water_mark'=>'./water.png',</div>
<div>  *   'water_mark_pos'=>4,</div>
<div>  *   'smallpic_mode'=>1</div>
<div>  *   );</div>
<div>  * @return ture/false</div>
<div>  */</div>
<div>  public function set_args($arg,$val="")</div>
<div>  {</div>
<div>    $params = array('waterrate','water_mark','water_mark_pos','smallpic_mode','watermode','width','height');</div>
<div>    if(is_array($arg))</div>
<div>    {</div>
<div>      foreach ($arg as $k =>$v)</div>
<div>      {</div>
<div>        if(in_array($k,$params))</div>
<div>        {</div>
<div>          $this->$k = $v;</div>
<div>        }
<div>      }
<div>    }
<div>    else</div>
<div>    {</div>
<div>    <span class="Apple-tab-span" style="white-space:pre">	</span>if(empty($val))</div>
<div>    <span class="Apple-tab-span" style="white-space:pre">	</span>{</div>
<div>    <span class="Apple-tab-span" style="white-space:pre">	</span>  return false;</div>
<div>    <span class="Apple-tab-span" style="white-space:pre">	</span>}
<div>    <span class="Apple-tab-span" style="white-space:pre">	</span>else</div>
<div>    <span class="Apple-tab-span" style="white-space:pre">	</span>{</div>
<div>    <span class="Apple-tab-span" style="white-space:pre">		</span>if(in_array($arg,$params))</div>
<div>        {</div>
<div>          $this->$arg = $val;</div>
<div>        }
<div>    <span class="Apple-tab-span" style="white-space:pre">	</span>}
<div>    }
<div>    return true;</div>
<div>  }
<div></div>
<div>  /**</div>
<div>  * 图片缩放</div>
<div>  *</div>
<div>  * @param $src_file 源文件路径</div>
<div>  * @param $dst_file 目标文件路径</div>
<div>  * @return 缩略图片路径/false</div>
<div>  */</div>
<div>  public function scale($src_file,$dst_file="")</div>
<div>  {</div>
<div>    $dst_width = $this->width;</div>
<div>    $dst_height = $this->height;</div>
<div>    $mode    = $this->smallpic_mode;</div>
<div>    $magic_water_handle = NewMagickWand();</div>
<div>    if (!MagickReadImage($magic_water_handle, $src_file))return false;</div>
<div></div>
<div>    //类型</div>
<div>    $srcext = strtolower(MagickGetImageFormat($magic_water_handle));</div>
<div>    if($srcext=='bmp')</div>
<div>    {</div>
<div>      $srcext = 'jpeg';</div>
<div>    }
<div>    if(!in_array($srcext,$this->format))return false;</div>
<div>    //尺寸</div>
<div>    $src_width = MagickGetImageWidth($magic_water_handle);</div>
<div>    $src_height = MagickGetImageHeight($magic_water_handle);</div>
<div></div>
<div>    //裁切缩放模式</div>
<div>    if($mode == 1)</div>
<div>    {</div>
<div>      $pos_x=$pos_y = 0;//裁切临时位置</div>
<div>      $src_widthc = $src_width;//裁切临时宽度</div>
<div>      $src_heightc = $src_height;//裁切临时高度</div>
<div>      if($src_width/$src_height>$dst_width/$dst_height)</div>
<div>      {</div>
<div>        $src_widthc = $src_height*$dst_width/$dst_height;</div>
<div>        $pos_x = ($src_width-$src_widthc)/2;</div>
<div></div>
<div>      }
<div>      else</div>
<div>      {</div>
<div>        $src_heightc = $src_width*$dst_height/$dst_width;</div>
<div>        $pos_y = ($src_height-$src_heightc)/2;</div>
<div>      }
<div>    MagickCropImage($magic_water_handle,$src_widthc,$src_heightc,$pos_x,$pos_y);//裁切</div>
<div>    //因为MagickCropImage函数后，Gif 图像改，但画布不变</div>
<div>    $this->magick_handle = NewMagickWand();</div>
<div>    MagickNewImage($this->magick_handle,$src_widthc,$src_heightc,'#ffffff');</div>
<div>    MagickSetFormat($this->magick_handle,$srcext);</div>
<div>    MagickCompositeImage($this->magick_handle,$magic_water_handle,MW_OverCompositeOp,0,0);</div>
<div>    //缩放</div>
<div>    MagickScaleImage($this->magick_handle, $dst_width, $dst_height);</div>
<div></div>
<div>    }
<div>    //比例缩放模式</div>
<div>    if($mode == 2)</div>
<div>    {</div>
<div>      if($src_width/$src_height>$dst_width/$dst_height)</div>
<div>      {</div>
<div>        $dst_height=$dst_width*$src_height/$src_width;</div>
<div>      }
<div>      else</div>
<div>      {</div>
<div>        $dst_width=$dst_height*$src_width/$src_height;</div>
<div>      }
<div>      $this->magick_handle=$magic_water_handle;//替换</div>
<div>      MagickScaleImage($this->magick_handle, $dst_width, $dst_height);//缩放</div>
<div>    }
<div>    //缩放填充模式</div>
<div>    if($mode == 3)</div>
<div>    {</div>
<div>      if($src_width/$src_height>$dst_width/$dst_height)</div>
<div>      {</div>
<div>        $dst_heightc=$dst_width*$src_height/$src_width;</div>
<div>        $dst_widthc=$dst_width;</div>
<div>      }
<div>      else</div>
<div>      {</div>
<div>        $dst_widthc=$dst_height*$src_width/$src_height;</div>
<div>        $dst_heightc=$dst_height;</div>
<div>      }
<div>       MagickScaleImage($magic_water_handle, $dst_widthc, $dst_heightc);//缩放</div>
<div>      $this->magick_handle = NewMagickWand();</div>
<div>      MagickNewImage($this->magick_handle,$dst_width,$dst_height,$this->smallpic_bgcolor);</div>
<div>      MagickSetFormat($this->magick_handle,$srcext);</div>
<div>      MagickCompositeImage($this->magick_handle,$magic_water_handle,MW_OverCompositeOp,($dst_width-$dst_widthc)/2,($dst_height-$dst_heightc)/2);</div>
<div>    }
<div>    //打水印</div>
<div>    if($this->watermode == 1)</div>
<div>    {</div>
<div>      $this->set_mark();</div>
<div>    }
<div>    if(empty($dst_file))</div>
<div>    {</div>
<div>      //建立临时文件</div>
<div>      $dst_file = tempnam($_SERVER["SINASRV_CACHE_DIR"],"TMP_IMG");</div>
<div>    }
<div>    MagickWriteImage($this->magick_handle, $dst_file);</div>
<div>    return $dst_file;</div>
<div>  }  </div>
<div></div>
<div>  /**</div>
<div>  * 打水印</div>
<div>  *</div>
<div>  * @param $src_file 要打水印的图片路径</div>
<div>  * @param $dst_file 生产水印的文件保存路径，为空则生产随机临时文件</div>
<div>  * @return 水印文件路径/false</div>
<div>  */</div>
<div>  public function water_mark($src_file,$dst_file="")</div>
<div>  {</div>
<div>    $this->magick_handle = NewMagickWand();</div>
<div>    if (!MagickReadImage($this->magick_handle, $src_file))</div>
<div>    return false;</div>
<div>    $this->set_mark();</div>
<div>    if(empty($dst_file))</div>
<div>    {</div>
<div>      //建立临时文件</div>
<div>      $dst_file = tempnam($_SERVER["SINASRV_CACHE_DIR"],"TMP_IMG");</div>
<div>    }
<div>    MagickWriteImage($this->magick_handle, $dst_file);</div>
<div>    return $dst_file;</div>
<div>  }
<div></div>
<div>  /**</div>
<div>  * 对内接口</div>
<div>  * 给图片打水印</div>
<div>  *</div>
<div>  */</div>
<div>  protected function set_mark()</div>
<div>  {</div>
<div></div>
<div>    //尺寸</div>
<div>    $dst_width = MagickGetImageWidth($this->magick_handle);</div>
<div>    $dst_height = MagickGetImageHeight($this->magick_handle);</div>
<div>    //处理水印图</div>
<div>    if ($this->water_mark && is_file($this->water_mark))</div>
<div>    {</div>
<div>      $magic_water_handle = NewMagickWand();</div>
<div>      MagickRemoveImage($magic_water_handle);</div>
<div>      if (MagickReadImage($magic_water_handle, $this->water_mark))</div>
<div>      {</div>
<div>        MagickScaleImage($magic_water_handle, $dst_width*$this->waterrate, $dst_width*$this->waterrate*MagickGetImageHeight($magic_water_handle)/MagickGetImageWidth($magic_water_handle));//缩放水印到图片的1/5</div>
<div>        if ($this->water_mark_pos == 1)</div>
<div>        {</div>
<div>          $left = $this->padding;</div>
<div>          $top = $this->padding;</div>
<div>        }
<div>        elseif ($this->water_mark_pos == 2)</div>
<div>        {</div>
<div>          $left = $dst_width-$this->padding-MagickGetImageWidth($magic_water_handle);</div>
<div>          $top = $this->padding;</div>
<div>        }
<div>        elseif ($this->water_mark_pos == 3)</div>
<div>        {</div>
<div>          $left = $this->padding;</div>
<div>          $top = $dst_height -$this->padding-MagickGetImageHeight($magic_water_handle);</div>
<div>        }
<div>        elseif ($this->water_mark_pos == 4)</div>
<div>        {</div>
<div>          $left = $dst_width-$this->padding-MagickGetImageWidth($magic_water_handle);</div>
<div>          $top =$dst_height -$this->padding-MagickGetImageHeight($magic_water_handle);</div>
<div>        }
<div>        elseif ($this->water_mark_pos == 5)</div>
<div>        {</div>
<div>          $left = ($dst_width-MagickGetImageWidth($magic_water_handle))/2;</div>
<div>          $top =($dst_height -MagickGetImageHeight($magic_water_handle))/2;</div>
<div>        }
<div>        MagickCompositeImage($this->magick_handle,$magic_water_handle,MW_OverCompositeOp,$left,$top);</div>
<div>      }
<div>    }
<div>  }
<div>}
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