摘自织梦CMS中的图片处理类

本文实例讲述了摘自织梦CMS中的图片处理类。分享给大家供大家参考。具体如下：

    <?php if(!defined('DEDEINC')) exit('dedecms');
    /**
     * 图像处理类
     *
     * @version  $Id: image.class.php 1 18:10 2010年7月5日Z tianya $
     * @package  DedeCMS.Libraries
     * @copyright  Copyright (c) 2007 - 2010, DesDev, Inc.
     * @license  http://help.dedecms.com/usersguide/license.html
     * @link   http://www.dedecms.com
     */
    class image
    {
     var $attachinfo;
     var $targetfile; //图片路径
     var $imagecreatefromfunc;
     var $imagefunc;
     var $attach;
     var $animatedgif;
     var $watermarkquality;
     var $watermarktext;
     var $thumbstatus;
     var $watermarkstatus;
     // 析构函数,兼容PHP4
     function image($targetfile, $cfg_thumb, $cfg_watermarktext, $photo_waterpos, $photo_diaphaneity, $photo_wheight, $photo_wwidth, $cfg_watermarktype, $photo_marktrans,$trueMarkimg, $attach = array())
     {
      $this->__construct($targetfile, $cfg_thumb, $cfg_watermarktext, $photo_waterpos, $photo_diaphaneity, $photo_wheight, $photo_wwidth, $cfg_watermarktype, $photo_marktrans,$trueMarkimg, $attach);
     }
     // 析构函数
     function __construct($targetfile, $cfg_thumb, $cfg_watermarktext, $photo_waterpos, $photo_diaphaneity, $photo_wheight, $photo_wwidth, $cfg_watermarktype, $photo_marktrans,$trueMarkimg, $attach = array())
     {
      $this->thumbstatus = $cfg_thumb;
      $this->watermarktext = $cfg_watermarktext;
      $this->watermarkstatus = $photo_waterpos;
      $this->watermarkquality = $photo_marktrans;
      $this->watermarkminwidth = $photo_wwidth;
      $this->watermarkminheight = $photo_wheight;
      $this->watermarktype = $cfg_watermarktype;
      $this->watermarktrans = $photo_diaphaneity;
      $this->animatedgif = 0;
      $this->targetfile = $targetfile;
      $this->attachinfo = @getimagesize($targetfile);
      $this->attach = $attach;
      switch($this->attachinfo['mime'])
      {
       case 'image/jpeg':
        $this->imagecreatefromfunc = function_exists('imagecreatefromjpeg') ? 'imagecreatefromjpeg' : '';
        $this->imagefunc = function_exists('imagejpeg') ? 'imagejpeg' : '';
        break;
       case 'image/gif':
        $this->imagecreatefromfunc = function_exists('imagecreatefromgif') ? 'imagecreatefromgif' : '';
        $this->imagefunc = function_exists('imagegif') ? 'imagegif' : '';
        break;
       case 'image/png':
        $this->imagecreatefromfunc = function_exists('imagecreatefrompng') ? 'imagecreatefrompng' : '';
        $this->imagefunc = function_exists('imagepng') ? 'imagepng' : '';
        break;
      }//为空则匹配类型的函数不存在
      $this->attach['size'] = empty($this->attach['size']) ? @filesize($targetfile) : $this->attach['size'];
      if($this->attachinfo['mime'] == 'image/gif')
      {
       $fp = fopen($targetfile, 'rb');
       $targetfilecontent = fread($fp, $this->attach['size']);
       fclose($fp);
       $this->animatedgif = strpos($targetfilecontent, 'NETSCAPE2.0') === false ? 0 : 1;
      }
     }
     /**
      * 生成缩略图
      *
      * @access public
      * @param  int $thumbwidth 图片宽度
      * @param  int $thumbheight 图片高度
      * @param  int $preview 是否预览
      * @return void
      */
     function thumb($thumbwidth, $thumbheight, $preview = 0)
     {
      $this->thumb_gd($thumbwidth, $thumbheight, $preview);

      if($this->thumbstatus == 2 && $this->watermarkstatus)
      {
       $this->image($this->targetfile, $this->attach);
       $this->attach['size'] = filesize($this->targetfile);
      }
     }
     /**
      * 图片水印
      *
      * @access public
      * @param  int $preview 是否预览
      * @return void
      */
     function watermark($preview = 0)
     {
      if($this->watermarkminwidth && $this->attachinfo[0] <= $this->watermarkminwidth && $this->watermarkminheight && $this->attachinfo[1] <= $this->watermarkminheight)
      {
       return ;
      }
      $this->watermark_gd($preview);
     }
     /**
      * 使用gd生成缩略图
      *
      * @access public
      * @param  int $thumbwidth 图片宽度
      * @param  int $thumbheight 图片高度
      * @param  int $preview 是否预览
      * @return void
      */
     function thumb_gd($thumbwidth, $thumbheight, $preview = 0)
     {
      if($this->thumbstatus && function_exists('imagecreatetruecolor') && function_exists('imagecopyresampled') && function_exists('imagejpeg'))
      {
       $imagecreatefromfunc = $this->imagecreatefromfunc;
       $imagefunc = $this->thumbstatus == 1 ? 'imagejpeg' : $this->imagefunc;
       list($imagewidth, $imageheight) = $this->attachinfo;
       if(!$this->animatedgif && ($imagewidth >= $thumbwidth || $imageheight >= $thumbheight))
       {
        $attach_photo = $imagecreatefromfunc($this->targetfile);
        $x_ratio = $thumbwidth / $imagewidth;
        $y_ratio = $thumbheight / $imageheight;
        if(($x_ratio * $imageheight) < $thumbheight)
        {
         $thumb['height'] = ceil($x_ratio * $imageheight);
         $thumb['width'] = $thumbwidth;
        }
        else
        {
         $thumb['width'] = ceil($y_ratio * $imagewidth);
         $thumb['height'] = $thumbheight;
        }
        $targetfile = !$preview ? ($this->thumbstatus == 1 ? $this->targetfile.'.thumb.jpg' : $this->targetfile) : './watermark_tmp.jpg';
        $thumb_photo = imagecreatetruecolor($thumb['width'], $thumb['height']);
        imagecopyresampled($thumb_photo, $attach_photo, 0, 0, 0, 0, $thumb['width'], $thumb['height'], $imagewidth, $imageheight);
        if($this->attachinfo['mime'] == 'image/jpeg')
        {
         $imagefunc($thumb_photo, $targetfile, 100);
        }
        else
        {
         $imagefunc($thumb_photo, $targetfile);
        }
        $this->attach['thumb'] = $this->thumbstatus == 1 ? 1 : 0;
       }
      }
     }
     /**
      * 使用gd进行水印
      *
      * @access public
      * @param  int $preview 是否预览
      * @return void
      */
     function watermark_gd($preview = 0)
     {
      if($this->watermarkstatus && function_exists('imagecopy') && function_exists('imagealphablending') && function_exists('imagecopymerge'))
      {
       $imagecreatefunc = $this->imagecreatefromfunc;
       $imagefunc = $this->imagefunc;
       list($imagewidth, $imageheight) = $this->attachinfo;
       if($this->watermarktype < 2)
       {
        $watermark_file = $this->watermarktype == 1 ? DEDEDATA.'/mark/mark.png' : DEDEDATA.'/mark/mark.gif';
        $watermarkinfo = @getimagesize($watermark_file);
        $watermark_logo = $this->watermarktype == 1 ? @imagecreatefrompng($watermark_file) : @imagecreatefromgif($watermark_file);
        if(!$watermark_logo)
        {
         return ;
        }
        list($logowidth, $logoheight) = $watermarkinfo;
       }
       else
       {
        $box = @imagettfbbox($this->watermarktext['size'], $this->watermarktext['angle'], $this->watermarktext['fontpath'],$this->watermarktext['text']);
        $logowidth = max($box[2], $box[4]) - min($box[0], $box[6]);
        $logoheight = max($box[1], $box[3]) - min($box[5], $box[7]);
        $ax = min($box[0], $box[6]) * -1;
        $ay = min($box[5], $box[7]) * -1;
       }
       $wmwidth = $imagewidth - $logowidth;
       $wmheight = $imageheight - $logoheight;
       if(($this->watermarktype < 2 && is_readable($watermark_file) || $this->watermarktype == 2) && $wmwidth > 10 && $wmheight > 10 && !$this->animatedgif)
       {
        switch($this->watermarkstatus)
        {
         case 1:

          $x = +5;
          $y = +5;
          break;
         case 2:
          $x = ($imagewidth - $logowidth) / 2;
          $y = +5;
          break;
         case 3:
          $x = $imagewidth - $logowidth - 5;
          $y = +5;
          break;
         case 4:
          $x = +5;
          $y = ($imageheight - $logoheight) / 2;
          break;
         case 5:
          $x = ($imagewidth - $logowidth) / 2;
          $y = ($imageheight - $logoheight) / 2;
          break;
         case 6:
          $x = $imagewidth - $logowidth - 5;
          $y = ($imageheight - $logoheight) / 2;
          break;
         case 7:
          $x = +5;
          $y = $imageheight - $logoheight - 5;
          break;
         case 8:
          $x = ($imagewidth - $logowidth) / 2;
          $y = $imageheight - $logoheight - 5;
          break;
         case 9:
          $x = $imagewidth - $logowidth - 5;
          $y = $imageheight - $logoheight -5;
          break;
        }
        $dst_photo = @imagecreatetruecolor($imagewidth, $imageheight);
        $target_photo = $imagecreatefunc($this->targetfile);
        imagecopy($dst_photo, $target_photo, 0, 0, 0, 0, $imagewidth, $imageheight);
        if($this->watermarktype == 1)
        {
         imagecopy($dst_photo, $watermark_logo, $x, $y, 0, 0, $logowidth, $logoheight);
        }
        elseif($this->watermarktype == 2)
        {
         if(($this->watermarktext['shadowx'] || $this->watermarktext['shadowy']) && $this->watermarktext['shadowcolor'])
         {
          $shadowcolorrgb = explode(',', $this->watermarktext['shadowcolor']);
          $shadowcolor = imagecolorallocate($dst_photo, $shadowcolorrgb[0], $shadowcolorrgb[1], $shadowcolorrgb[2]);
          imagettftext($dst_photo, $this->watermarktext['size'], $this->watermarktext['angle'],
          $x + $ax + $this->watermarktext['shadowx'], $y + $ay + $this->watermarktext['shadowy'], $shadowcolor,
          $this->watermarktext['fontpath'], $this->watermarktext['text']);
         }
         $colorrgb = explode(',', $this->watermarktext['color']);
         $color = imagecolorallocate($dst_photo, $colorrgb[0], $colorrgb[1], $colorrgb[2]);
         imagettftext($dst_photo, $this->watermarktext['size'], $this->watermarktext['angle'],
         $x + $ax, $y + $ay, $color, $this->watermarktext['fontpath'], $this->watermarktext['text']);
        }
        else
        {
         imagealphablending($watermark_logo, true);
         imagecopymerge($dst_photo, $watermark_logo, $x, $y, 0, 0, $logowidth, $logoheight, $this->watermarktrans);
        }
        $targetfile = !$preview ? $this->targetfile : './watermark_tmp.jpg';
        if($this->attachinfo['mime'] == 'image/jpeg')
        {
         $imagefunc($dst_photo, $targetfile, $this->watermarkquality);
        }
        else
        {
         $imagefunc($dst_photo, $targetfile);
        }
        $this->attach['size'] = filesize($this->targetfile);
       }
      }
     }
    }//End Class

希望本文所述对大家的php程序设计有所帮助。