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。