摘自织梦CMS中的图片处理类
发布:smiling 来源: PHP粉丝网 添加日期:2021-06-16 10:01:29 浏览: 评论:0
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
希望本文所述对大家的php程序设计有所帮助。
Tags: 织梦CMS图片处理类
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