图片处理类代码,PHP代码库,德仔网

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【PHP】图片处理类
作者:窦骁年华 / 发布于2011/8/7/ 1154
<div><?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 <a href="http://help.dedecms.com/usersguide/license.html">http://help.dedecms.com/usersguide/license.html</a>
* @link <a href="http://www.dedecms.com">http://www.dedecms.com</a>
*/
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, $attach);
 }
<div> // 析构函数
 function __construct($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 = $attach;</div>
<div>
 switch($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</div>
<div> $this->attach['size'] = empty($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;
 }
 }
<div> /**
 * 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, $preview);</div>
<div> if($this->thumbstatus == 2 && $this->watermarkstatus)
 {
 $this->image($this->targetfile, $this->attach);
 $this->attach['size'] = filesize($this->targetfile);
 }
 }
<div> /**
 * 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);
 }
<div> /**
 * 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, $preview = 0)
 {</div>
<div> if($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;
 }
 }
 }
<div> /**
 * 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:</div>
<div> $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</div>
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