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
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：
__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] watermarkminwidth && $this->watermarkminheight && $this->attachinfo[1] 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) 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 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 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。
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