摘自织梦CMS中的图片处理类
作者：Minho
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
$this->attach['size'] = empty($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。