PHP 图片处理类
<?php /** * images.php 图片处理类 */class ThumbHandler{ var $dst_img;// 目标文件 var $h_src; // 图片资源句柄 var $h_dst;// 新图句柄 var $h_mask;// 水印句柄 var $img_create_quality = 100;// 图片生成质量 var $img_display_quality = 80;// 图片显示质量,默认为75 var $img_scale = 0;// 图片缩放比例 var $src_w = 0;// 原图宽度 var $src_h = 0;// 原图高度 var $dst_w = 0;// 新图总宽度 var $dst_h = 0;// 新图总高度 var $fill_w;// 填充图形宽 var $fill_h;// 填充图形高 var $copy_w;// 拷贝图形宽 var $copy_h;// 拷贝图形高 var $src_x = 0;// 原图绘制起始横坐标 var $src_y = 0;// 原图绘制起始纵坐标 var $start_x;// 新图绘制起始横坐标 var $start_y;// 新图绘制起始纵坐标 var $mask_word;// 水印文字 var $mask_img;// 水印图片 var $mask_pos_x = 0;// 水印横坐标 var $mask_pos_y = 0;// 水印纵坐标 var $mask_offset_x = 5;// 水印横向偏移 var $mask_offset_y = 5;// 水印纵向偏移 var $font_w;// 水印字体宽 var $font_h;// 水印字体高 var $mask_w;// 水印宽 var $mask_h;// 水印高 var $mask_font_color = "#ffffff";// 水印文字颜色 var $mask_font = 2;// 水印字体 var $font_size;// 尺寸 var $mask_position = 0;// 水印位置 var $mask_img_pct = 50;// 图片合并程度,值越大，合并程序越低 var $mask_txt_pct = 50;// 文字合并程度,值越小，合并程序越低 var $img_border_size = 0;// 图片边框尺寸 var $img_border_color;// 图片边框颜色 var $_flip_x=0;// 水平翻转次数 var $_flip_y=0;// 垂直翻转次数 var $cut_type=0;// 剪切类型 var $img_type;// 文件类型// 文件类型定义,并指出了输出图片的函数 var $all_type = array( "jpg" => array("output"=>"imagejpeg"), "gif" => array("output"=>"imagegif"), "png" => array("output"=>"imagepng"), "wbmp" => array("output"=>"image2wbmp"), "jpeg" => array("output"=>"imagejpeg")); function ThumbHandler() { $this->mask_font_color = "#ffffff"; $this->font = 2; $this->font_size = 12; } function getImgWidth($src) { return imagesx($src); } function getImgHeight($src) { return imagesy($src); } /** * 设置图片生成路径 */ function setSrcImg($src_img, $img_type=null) { if(!file_exists($src_img)) { die("图片不存在"); } if(!empty($img_type)) { $this->img_type = $img_type; } else { $this->img_type = $this->_getImgType($src_img); } $this->_checkValid($this->img_type); // file_get_contents函数要求php版本>4.3.0 $src = ''; if(function_exists("file_get_contents")) { $src = file_get_contents($src_img); } else { $handle = fopen ($src_img, "r"); while (!feof ($handle)) { $src .= fgets($fd, 4096); } fclose ($handle); } if(empty($src)) { die("图片源为空"); } $this->h_src = @ImageCreateFromString($src); $this->src_w = $this->getImgWidth($this->h_src); $this->src_h = $this->getImgHeight($this->h_src); } function setDstImg($dst_img) { $arr = explode('/',$dst_img); $last = array_pop($arr); $path = implode('/',$arr); $this->_mkdirs($path); $this->dst_img = $dst_img; } /** * 设置图片显路径 */ function setImgDisplayQuality($n) { $this->img_display_quality = (int)$n; } function setImgCreateQuality($n) { $this->img_create_quality = (int)$n; } function setMaskWord($word) { $this->mask_word .= $word; } function setMaskFontColor($color="#ffffff") { $this->mask_font_color = $color; } /** * 水印文件 */ function setMaskFont($font=2) { if(!is_numeric($font) && !file_exists($font)) { die("字体文件不存在"); } $this->font = $font; } /** * 字体大写 */ function setMaskFontSize($size = "12") { $this->font_size = $size; } //水印 function setMaskImg($img) { $this->mask_img = $img; } function setMaskOffsetX($x) { $this->mask_offset_x = (int)$x; } function setMaskOffsetY($y) { $this->mask_offset_y = (int)$y; } function setMaskPosition($position=0) { $this->mask_position = (int)$position; } function setMaskImgPct($n) { $this->mask_img_pct = (int)$n; } function setMaskTxtPct($n) { $this->mask_txt_pct = (int)$n; } function setDstImgBorder($size=1, $color="#000000") { $this->img_border_size = (int)$size; $this->img_border_color = $color; } function flipH() { $this->_flip_x; } function flipV() { $this->_flip_y; } function setCutType($type) { $this->cut_type = (int)$type; } function setRectangleCut($width, $height) { $this->fill_w = (int)$width; $this->fill_h = (int)$height; } function setSrcCutPosition($x, $y) { $this->src_x = (int)$x; $this->src_y = (int)$y; } function createImg($a, $b=null) { $num = func_num_args(); if(1 == $num) { $r = (int)$a; if($r img_scale = $r; $this->_setNewImgSize($r); } if(2 == $num) { $w = (int)$a; $h = (int)$b; if(0 == $w) { die("目标宽度不能为0"); } if(0 == $h) { die("目标高度不能为0"); } $this->_setNewImgSize($w, $h); } if($this->_flip_x%2!=0) { $this->_flipH($this->h_src); } if($this->_flip_y%2!=0) { $this->_flipV($this->h_src); } $this->_createMask(); $this->_output(); if(imagedestroy($this->h_src) && imagedestroy($this->h_dst)) { Return true; } else { Return false; } } /** * 生成水印,调用了生成水印文字和水印图片两个方法 */ function _createMask() { if($this->mask_word) { // 获取字体信息 $this->_setFontInfo(); if($this->_isFull()) { die("水印文字过大"); } else { $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h); $white = ImageColorAllocate($this->h_dst,255,255,255); imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色 $this->_drawBorder(); imagecopyresampled( $this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->fill_h, $this->copy_w, $this->copy_h); $this->_createMaskWord($this->h_dst); } }if($this->mask_img) { $this->_loadMaskImg(); //加载时，取得宽高 if($this->_isFull()) { // 将水印生成在原图上再拷 $this->_createMaskImg($this->h_src); $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h); $white = ImageColorAllocate($this->h_dst,255,255,255); imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色 $this->_drawBorder(); imagecopyresampled( $this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->start_y, $this->copy_w, $this->copy_h); } else { // 创建新图并拷贝 $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h); $white = ImageColorAllocate($this->h_dst,255,255,255); imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色 $this->_drawBorder(); imagecopyresampled( $this->h_dst, $this->h_src, $this->start_x, $this->start_y, $this->src_x, $this->src_y, $this->fill_w, $this->fill_h, $this->copy_w, $this->copy_h); $this->_createMaskImg($this->h_dst); } }if(empty($this->mask_word) && empty($this->mask_img)) { $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h); $white = ImageColorAllocate($this->h_dst,255,255,255); imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色 $this->_drawBorder(); imagecopyresampled( $this->h_dst, $this->h_src,$this->start_x, $this->start_y,$this->src_x, $this->src_y,$this->fill_w, $this->fill_h,$this->copy_w, $this->copy_h); } } function _drawBorder() { if(!empty($this->img_border_size)) { $c = $this->_parseColor($this->img_border_color); $color = ImageColorAllocate($this->h_src,$c[0], $c[1], $c[2]); imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$color);// 填充背景色 } } function _createMaskWord($src) { $this->_countMaskPos(); $this->_checkMaskValid(); $c = $this->_parseColor($this->mask_font_color); $color = imagecolorallocatealpha($src, $c[0], $c[1], $c[2], $this->mask_txt_pct); if(is_numeric($this->font)) { imagestring($src,$this->font,$this->mask_pos_x, $this->mask_pos_y,$this->mask_word,$color); } else { imagettftext($src,$this->font_size, 0,$this->mask_pos_x, $this->mask_pos_y,$color,$this->font,$this->mask_word); } } function _createMaskImg($src) { $this->_countMaskPos(); $this->_checkMaskValid(); imagecopymerge($src,$this->h_mask,$this->mask_pos_x ,$this->mask_pos_y0, 0,$this->mask_w, $this->mask_h,$this->mask_img_pct); imagedestroy($this->h_mask); } function _loadMaskImg() { $mask_type = $this->_getImgType($this->mask_img); $this->_checkValid($mask_type); // file_get_contents函数要求php版本>4.3.0 $src = ''; if(function_exists("file_get_contents")) { $src = file_get_contents($this->mask_img); } else { $handle = fopen ($this->mask_img, "r"); while (!feof ($handle)) { $src .= fgets($fd, 4096); } fclose ($handle); } if(empty($this->mask_img)) { die("水印图片为空"); } $this->h_mask = ImageCreateFromString($src); $this->mask_w = $this->getImgWidth($this->h_mask); $this->mask_h = $this->getImgHeight($this->h_mask); } function _output() { $img_type = $this->img_type; $func_name = $this->all_type[$img_type]['output']; if(function_exists($func_name)) { // 判断浏览器,若是IE就不发送头 if(isset($_SERVER['HTTP_USER_AGENT'])) { $ua = strtoupper($_SERVER['HTTP_USER_AGENT']); if(!preg_match('/^.*MSIE.*\)$/i',$ua)) { header("Content-type:$img_type"); } } $func_name($this->h_dst, $this->dst_img, $this->img_display_quality); } else { Return false; } } function _parseColor($color) { $arr = array(); for($ii=1; $ii<strlen hexdec return function _countmaskpos if>_isFull()) { switch($this->mask_position) { case 1: $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size; $this->mask_pos_y = $this->mask_offset_y + $this->img_border_sizebreak; case 2: $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size; $this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_ybreak; case 3: $this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x; $this->mask_pos_y = $this->mask_offset_y + $this->img_border_sizebreak; case 4: $this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x; $this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_ybreak; default:// 默认将水印放到右下,偏移指定像素 $this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x; $this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_ybreak; } } else { switch($this->mask_position) { case 1:// 左上 $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size; $this->mask_pos_y = $this->mask_offset_y + $this->img_border_sizebreak; case 2:// 左下 $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size; $this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_sizebreak; case 3:// 右上 $this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size; $this->mask_pos_y = $this->mask_offset_y + $this->img_border_sizebreak; case 4:// 右下 $this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size; $this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_sizebreak; default:// 默认将水印放到右下,偏移指定像素 $this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size; $this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_sizebreak; } } } function _setFontInfo() { if(is_numeric($this->font)) { $this->font_w = imagefontwidth($this->font); $this->font_h = imagefontheight($this->font);// 计算水印字体所占宽高 $word_length = strlen($this->mask_word); $this->mask_w = $this->font_w*$word_length; $this->mask_h = $this->font_h; } else { $arr = imagettfbbox ($this->font_size,0, $this->font,$this->mask_word); $this->mask_w = abs($arr[0] - $arr[2]); $this->mask_h = abs($arr[7] - $arr[1]); } } //新图片大小 function _setNewImgSize($img_w, $img_h=null) { $num = func_num_args(); if(1 == $num) { $this->img_scale = $img_w;// 宽度作为比例 $this->fill_w = round($this->src_w * $this->img_scale / 100) - $this->img_border_size*2; $this->fill_h = round($this->src_h * $this->img_scale / 100) - $this->img_border_size*2;// 源文件起始坐标 $this->src_x = 0; $this->src_y = 0; $this->copy_w = $this->src_w; $this->copy_h = $this->src_h;// 目标尺寸 $this->dst_w = $this->fill_w + $this->img_border_size*2; $this->dst_h = $this->fill_h + $this->img_border_size*2; } if(2 == $num) { $fill_w = (int)$img_w - $this->img_border_size*2; $fill_h = (int)$img_h - $this->img_border_size*2; if($fill_w src_w/$fill_w; $rate_h = $this->src_h/$fill_h; switch($this->cut_type) { case 0:// 如果原图大于缩略图，产生缩小，否则不缩小 if($rate_w fill_w = (int)$this->src_w; $this->fill_h = (int)$this->src_h; } else { if($rate_w >= $rate_h) { $this->fill_w = (int)$fill_w; $this->fill_h = round($this->src_h/$rate_w); } else { $this->fill_w = round($this->src_w/$rate_h); $this->fill_h = (int)$fill_h; } } $this->src_x = 0; $this->src_y = 0; $this->copy_w = $this->src_w; $this->copy_h = $this->src_h;// 目标尺寸 $this->dst_w = $this->fill_w + $this->img_border_size*2; $this->dst_h = $this->fill_h + $this->img_border_size*2; break;// 自动裁切 case 1:// 如果图片是缩小剪切才进行操作 if($rate_w >= 1 && $rate_h >=1) { if($this->src_w > $this->src_h) { $src_x = round($this->src_w-$this->src_h)/2; $this->setSrcCutPosition($src_x, 0); $this->setRectangleCut($fill_h, $fill_h); $this->copy_w = $this->src_h; $this->copy_h = $this->src_h; } elseif($this->src_w src_h) { $src_y = round($this->src_h-$this->src_w)/2; $this->setSrcCutPosition(0, $src_y); $this->setRectangleCut($fill_w, $fill_h); $this->copy_w = $this->src_w; $this->copy_h = $this->src_w; } else { $this->setSrcCutPosition(0, 0); $this->copy_w = $this->src_w; $this->copy_h = $this->src_w; $this->setRectangleCut($fill_w, $fill_h); } } else { $this->setSrcCutPosition(0, 0); $this->setRectangleCut($this->src_w, $this->src_h); $this->copy_w = $this->src_w; $this->copy_h = $this->src_h; } // 目标尺寸 $this->dst_w = $this->fill_w + $this->img_border_size*2; $this->dst_h = $this->fill_h + $this->img_border_size*2; break; // 手工裁切 case 2:$this->copy_w = $this->fill_w; $this->copy_h = $this->fill_h; // 目标尺寸 $this->dst_w = $this->fill_w + $this->img_border_size*2; $this->dst_h = $this->fill_h + $this->img_border_size*2; break; default: break; } }// 目标文件起始坐标 $this->start_x = $this->img_border_size; $this->start_y = $this->img_border_size; } /** * 检查水印图是否大于生成后的图片宽高 */ function _isFull() { Return ( $this->mask_w + $this->mask_offset_x > $this->fill_w || $this->mask_h + $this->mask_offset_y > $this->fill_h) ?true:false; } function _checkMaskValid() { if( $this->mask_w + $this->mask_offset_x > $this->src_w || $this->mask_h + $this->mask_offset_y > $this->src_h) { die("水印图片尺寸大于原图，请缩小水印图"); } } /** * 取得图片类型 */ function _getImgType($file_path) { $type_list = array("1"=>"gif","2"=>"jpg","3"=>"png","4"=>"swf","5" => "psd","6"=>"bmp","15"=>"wbmp"); if(file_exists($file_path)) { $img_info = @getimagesize ($file_path); if(isset($type_list[$img_info[2]])) { Return $type_list[$img_info[2]]; } } else { die("文件不存在,不能取得文件类型!"); } } /** * 检查图片类型是否合法,调用了array_key_exists函数，此函数要求 * php版本大于4.1.0 * * @param */ function _checkValid($img_type) { if(!array_key_exists($img_type, $this->all_type)) { Return false; } } /** * 按指定路径生成目录 * * @param */ function _mkdirs($path) { $adir = explode('/',$path); $dirlist = ''; $rootdir = array_shift($adir); if(($rootdir!='.'||$rootdir!='..')&&!file_exists($rootdir)) { @mkdir($rootdir); } foreach($adir as $key=>$val) { if($val!='.'&&$val!='..') { $dirlist .= "/".$val; $dirpath = $rootdir.$dirlist; if(!file_exists($dirpath)) { @mkdir($dirpath); chmod($dirpath,0777); } } } } function _flipV($src) { $src_x = $this->getImgWidth($src); $src_y = $this->getImgHeight($src); $new_im = imagecreatetruecolor($src_x, $src_y); for ($y = 0; $y h_src = $new_im; } function _flipH($src) { $src_x = $this->getImgWidth($src); $src_y = $this->getImgHeight($src); $new_im = imagecreatetruecolor($src_x, $src_y); for ($x = 0; $x h_src = $new_im; }}</strlen>?
??? 测试代码：
?
??? test.php
?
<?phprequire_once ('images.php');$t = new ThumbHandler();$t->setSrcImg("test.gif");$t->setDstImg("new_test.jpg");$t->setMaskPosition(1);$t->setMaskImgPct(80);$t->setDstImgBorder(4,"#dddddd");// 指定缩放比例$t->createImg(300,200);?
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