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：
<?phpif(!defined('DEDEINC'))exit('dedecms');
/**
*图像处理类
*
*@version$Id:image.class.php118:102010年7月5日Ztianya$
*@packageDedeCMS.Libraries
*@copyrightCopyright(c)2007-2010,DesDev,Inc.
*@licensehttp://help.dedecms.com/usersguide/license.html
*@linkhttp://www.dedecms.com
*/
classimage
{
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
functionimage($targetfile,$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
*
*@accesspublic
*@paramint$thumbwidth图片宽度
*@paramint$thumbheight图片高度
*@paramint$preview是否预览
*@returnvoid
*/
functionthumb($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
*
*@accesspublic
*@paramint$preview是否预览
*@returnvoid
*/
functionwatermark($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
*
*@accesspublic
*@paramint$thumbwidth图片宽度
*@paramint$thumbheight图片高度
*@paramint$preview是否预览
*@returnvoid
*/
functionthumb_gd($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
*
*@accesspublic
*@paramint$preview是否预览
*@returnvoid
*/
functionwatermark_gd($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)
{
case1:
$x=+5;
$y=+5;
break;
case2:
$x=($imagewidth-$logowidth)/2;
$y=+5;
break;
case3:
$x=$imagewidth-$logowidth-5;
$y=+5;
break;
case4:
$x=+5;
$y=($imageheight-$logoheight)/2;
break;
case5:
$x=($imagewidth-$logowidth)/2;
$y=($imageheight-$logoheight)/2;
break;
case6:
$x=$imagewidth-$logowidth-5;
$y=($imageheight-$logoheight)/2;
break;
case7:
$x=+5;
$y=$imageheight-$logoheight-5;
break;
case8:
$x=($imagewidth-$logowidth)/2;
$y=$imageheight-$logoheight-5;
break;
case9:
$x=$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);
}
}
}
}//EndClass
希望本文所述对大家的php程序设计有所帮助。