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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应用
<?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,$attach);
}
// 析构函数
function __construct($targetfile,$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,$preview);
if($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,$preview = 0)
{
if($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,$attach_photo,$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,$imageheight);
if($this->watermarktype == 1)
{
imagecopy($dst_photo,$watermark_logo,$x,$y,$logowidth,$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,$this->watermarktext['size'],$x + $ax + $this->watermarktext['shadowx'],$y + $ay + $this->watermarktext['shadowy'],$shadowcolor,$this->watermarktext['text']);
}
$colorrgb = explode(',$this->watermarktext['color']);
$color = imagecolorallocate($dst_photo,$colorrgb[0],$colorrgb[1],$colorrgb[2]);
imagettftext($dst_photo,$x + $ax,$y + $ay,$color,$this->watermarktext['text']);
}
else
{
imagealphablending($watermark_logo,true);
imagecopymerge($dst_photo,$logoheight,$this->watermarktrans);
}
$targetfile = !$preview ? $this->targetfile : './watermark_tmp.jpg';
if($this->attachinfo['mime'] == 'image/jpeg')
{
$imagefunc($dst_photo,$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程序设计有所赞助.
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