摘自织梦CMS中的图片处理类

2024-05-04 23:38:39

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这篇文章主要介绍了摘自织梦CMS中的图片处理类,通过面向对象的方式较为详细的实现了php针对图片的缩略图生成及水印添加等操作技巧,非常具有实用价值,需要的朋友可以参考下

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

$this->attach['size'] = emptyempty($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