<?php /** * 来源：互联网 */ class image { var $w_pct = 100; //透明度 var $w_quality = 100; //质量 var $w_minwidth = 500; //最小宽 var $w_minheight = 500; //最小高 var $interlace = 0; //图像是否为隔行扫描的 var $fontfile ; //字体文件 var $w_img ; //默认水印图 function __construct() { $this->fontfile = $_SERVER['DOCUMENT_ROOT'].'/public/fonts/simhei.ttf'; $this->w_img = ''; } function image() { $this->__construct(); } function info($img) { $imageinfo = getimagesize($img); //返回图像信息数组 0=>宽的像素 1=>高的像素 2=>是图像类型的标记 3 =>是文本字符串，内容为“height="yyy" width="xxx"”， if($imageinfo === false) return false; $imagetype = strtolower(substr(image_type_to_extension($imageinfo[2]),1)); //获取图像文件类型 $imageinfo[2]是图像类型的标记 $imagesize = filesize($img); //图像大小 $info = array( 'width'=>$imageinfo[0], 'height'=>$imageinfo[1], 'type'=>$imagetype, 'size'=>$imagesize, 'mime'=>$imageinfo['mime'] ); return $info; } /** * 缩略图 * * @param string $image * @param string $filename * @param int $maxwidth * @param int $maxheight * @param string $suffix * @param int $autocut * @return string */ function thumb($image, $filename = '',$maxwidth = 50, $maxheight = 50, $suffix='_thumb', $autocut = 0) { if( !$this->check($image)) return false; $info = $this->info($image); //获取图片信息 if($info === false) return false; $srcwidth = $info['width']; //源图宽 $srcheight = $info['height']; //源图高 $pathinfo = pathinfo($image); $type = $pathinfo['extension']; //取得扩展名 if(!$type) $type = $info['type']; //如果没有取到，用$info['type'] $type = strtolower($type); unset($info); $scale = min($maxwidth/$srcwidth, $maxheight/$srcheight); //获取缩略比例 //获取按照源图的比列 $createwidth = $width = (int) ($srcwidth*$scale);//取得缩略宽(); $createheight = $height = (int)($srcheight*$scale);//(); //取得缩略高 $psrc_x = $psrc_y = 0; if($autocut) //按照缩略图的比例来获取 { if($maxwidth/$maxheight<$srcwidth/$srcheight && $maxheight>=$height) //如果缩略图按比列比源图窄的话 { $width = $maxheight/$height*$width; //宽按照相应比例做处理 $height = $maxheight;// //高不变 } elseif($maxwidth/$maxheight>$srcwidth/$srcheight && $maxwidth>=$width)//如果缩略图按比列比源图宽的话 { $height = $maxwidth/$width*$height;// $width = $maxwidth; } if($maxwidth == '55'){ $width = '55'; $createwidth = '55'; } if($maxwidth == '110'){ $width = '110'; $createwidth = '110'; } } if($srcwidth<='280' && $maxwidth != '110'){ $createwidth= $srcwidth; $createheight = $srcheight; } $createfun = 'imagecreatefrom'.($type=='jpg' ? 'jpeg' : $type); //找到不同的图像处理函数 $srcimg = $createfun($image); //返回图像标识符 if($type != 'gif' && function_exists('imagecreatetruecolor')){ $thumbimg = imagecreatetruecolor($createwidth, $createheight); //新建一个真彩色图像 }else{ if($maxwidth == '110' && $srcheight >= $srcwidth){ $height1 = 72; $thumbimg = imagecreate($width, $height1); //新建一个基于调色板的图像 }elseif ($maxwidth == '110' && $srcheight <= $srcwidth){ $width1 = 110; $thumbimg = imagecreate($width1, $height); //新建一个基于调色板的图像 }else{ $thumbimg = imagecreate($width, $height); //新建一个基于调色板的图像 } } if(function_exists('imagecopyresampled')){ //重采样拷贝部分图像并调整大小，真彩 //imagecopyresampled(新图，源图,新图左上角x距离,新图左上角y距离,源图左上角x距离,源图左上角y距离,新图宽,新图高,源图宽,源图高) if($maxwidth == '110' && $srcheight >= $srcwidth){ $psrc_x = 0; $psrc_yz = $height/2; $psrc_y = $psrc_yz; $width = '110'; } if($maxwidth == '110' && $srcheight >= $srcwidth && $srcheight>= '72' && $srcwidth <= '110'){ $psrc_x = 0; $psrc_yz = $height/2; $psrc_y = $psrc_yz; $width = '110'; } if($maxheight == '72' && $srcheight <= $srcwidth && $srcheight<= '72' && $srcwidth >= '110'){ $cha = ($maxheight-$srcheight)/2; $psrc_y = -($cha); $width = $srcwidth; $height = '72'; $srcheight = '72'; } imagecopyresampled($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height, $srcwidth, $srcheight); }else{ //拷贝部分图像并调整大小，调色板 imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height, $srcwidth, $srcheight); } if($type=='gif' || $type=='png') { //imagecolorallocate 为一幅图像分配颜色 $background_color = imagecolorallocate($thumbimg, 0, 255, 0); // 给基于调色板的图像填充背景色， 指派一个绿色 // imagecolortransparent 将某个颜色定义为透明色 imagecolortransparent($thumbimg, $background_color); // 设置为透明色，若注释掉该行则输出绿色的图 } // imageinterlace 激活或禁止隔行扫描 if($type=='jpg' || $type=='jpeg') imageinterlace($thumbimg, $this->interlace); $imagefun = 'image'.($type=='jpg' ? 'jpeg' : $type); //imagejpeg imagegif imagepng if(empty($filename)) $filename = substr($image, 0, strrpos($image, '.')).$suffix.'.'.$type; //获取文件名 //aaa.gif aaa_thumb.gif $imagefun($thumbimg, $filename); //新建图像 imagedestroy($thumbimg); //销毁缩略图 imagedestroy($srcimg); //销毁源图 return $filename; } /** * 限制宽或高 * * @param string $image * @param int $maxwidth * @param int $maxheight * @param string $suffix * @return string */ function thumb3($image,$maxwidth = 0, $maxheight = 0, $suffix='_thumb') { if( !$this->check($image)) return false; $info = $this->info($image); //获取图片信息 if($info === false) return false; $srcwidth = $info['width']; //源图宽 $srcheight = $info['height']; //源图高 $pathinfo = pathinfo($image); $type = $pathinfo['extension']; //取得扩展名 if(!$type) $type = $info['type']; //如果没有取到，用$info['type'] $type = strtolower($type); unset($info); if($maxwidth==0){ $scale = $maxheight/$srcheight; if($scale<1){ $createwidth = $srcwidth*$scale; $createheight = $maxheight; }else{ $createwidth = $srcwidth; $createheight = $srcheight; } } if($maxheight==0){ $scale = $maxwidth/$srcwidth; if($scale<1){ $createwidth = $maxwidth; $createheight = $srcheight*$scale; }else{ $createwidth = $srcwidth; $createheight = $srcheight; } } $psrc_x = $psrc_y = 0; $createfun = 'imagecreatefrom'.($type=='jpg' ? 'jpeg' : $type); //找到不同的图像处理函数 $srcimg = $createfun($image); //返回图像标识符 if($type != 'gif' && function_exists('imagecreatetruecolor')){ $thumbimg = imagecreatetruecolor($createwidth, $createheight); //新建一个真彩色图像 }else{ $thumbimg = imagecreate($createwidth, $createheight); //新建一个基于调色板的图像 } if(function_exists('imagecopyresampled')){ //重采样拷贝部分图像并调整大小，真彩 //imagecopyresampled(新图，源图,新图左上角x距离,新图左上角y距离,源图左上角x距离,源图左上角y距离,新图宽,新图高,源图宽,源图高) imagecopyresampled($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $createheight, $srcwidth, $srcheight); }else{ //拷贝部分图像并调整大小，调色板 imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $createheight, $srcwidth, $srcheight); } if($type=='gif' || $type=='png') { //imagecolorallocate 为一幅图像分配颜色 $background_color = imagecolorallocate($thumbimg, 0, 255, 0); // 给基于调色板的图像填充背景色， 指派一个绿色 // imagecolortransparent 将某个颜色定义为透明色 imagecolortransparent($thumbimg, $background_color); // 设置为透明色，若注释掉该行则输出绿色的图 } // imageinterlace 激活或禁止隔行扫描 if($type=='jpg' || $type=='jpeg') imageinterlace($thumbimg, $this->interlace); $imagefun = 'image'.($type=='jpg' ? 'jpeg' : $type); //imagejpeg imagegif imagepng $filename = substr($image, 0, strrpos($image, '.')).$suffix.'.'.$type; //获取文件名 //aaa.gif aaa_thumb.gif $imagefun($thumbimg, $filename); //新建图像 imagedestroy($thumbimg); //销毁缩略图 imagedestroy($srcimg); //销毁源图 return $filename; } /** * 生成特定尺寸缩略图 解决原版缩略图不能满足特定尺寸的问题 PS：会裁掉图片不符合缩略图比例的部分 * @static * @access public * @param string $image 原图 * @param string $type 图像格式 * @param string $thumbname 缩略图文件名 * @param string $maxWidth 宽度 * @param string $maxHeight 高度 * @param boolean $interlace 启用隔行扫描 * @return void */ static function thumb2($image, $thumbname, $type='', $maxWidth=200, $maxHeight=50, $interlace=true) { // 获取原图信息 $info = Image::getImageInfo($image); if ($info !== false) { $srcWidth = $info['width']; $srcHeight = $info['height']; $type = empty($type) ? $info['type'] : $type; $type = strtolower($type); $interlace = $interlace ? 1 : 0; unset($info); $scale = max($maxWidth / $srcWidth, $maxHeight / $srcHeight); // 计算缩放比例 //判断原图和缩略图比例 如原图宽于缩略图则裁掉两边 反之.. if($maxWidth / $srcWidth > $maxHeight / $srcHeight){ //高于 $srcX = 0; $srcY = ($srcHeight - $maxHeight / $scale) / 2 ; $cutWidth = $srcWidth; $cutHeight = $maxHeight / $scale; }else{ //宽于 $srcX = ($srcWidth - $maxWidth / $scale) / 2; $srcY = 0; $cutWidth = $maxWidth / $scale; $cutHeight = $srcHeight; } // 载入原图 $createFun = 'ImageCreateFrom' . ($type == 'jpg' ? 'jpeg' : $type); $srcImg = $createFun($image); //创建缩略图 if ($type != 'gif' && function_exists('imagecreatetruecolor')) $thumbImg = imagecreatetruecolor($maxWidth, $maxHeight); else $thumbImg = imagecreate($maxWidth, $maxHeight); // 复制图片 if (function_exists("ImageCopyResampled")) imagecopyresampled($thumbImg, $srcImg, 0, 0, $srcX, $srcY, $maxWidth, $maxHeight, $cutWidth, $cutHeight); else imagecopyresized($thumbImg, $srcImg, 0, 0, $srcX, $srcY, $maxWidth, $maxHeight, $cutWidth, $cutHeight); if ('gif' == $type || 'png' == $type) { //imagealphablending($thumbImg, false);//取消默认的混色模式 //imagesavealpha($thumbImg,true);//设定保存完整的 alpha 通道信息 $background_color = imagecolorallocate($thumbImg, 0, 255, 0); // 指派一个绿色 imagecolortransparent($thumbImg, $background_color); // 设置为透明色，若注释掉该行则输出绿色的图 } // 对jpeg图形设置隔行扫描 if ('jpg' == $type || 'jpeg' == $type) imageinterlace($thumbImg, $interlace); // 生成图片 $imageFun = 'image' . ($type == 'jpg' ? 'jpeg' : $type); @chmod(dirname($thumbname),0777); $imageFun($thumbImg, $thumbname); imagedestroy($thumbImg); imagedestroy($srcImg); return $thumbname; } return false; } /** * 取得图像信息 * @static * @access public * @param string $image 图像文件名 * @return mixed */ static function getImageInfo($img) { $imageInfo = getimagesize($img); if ($imageInfo !== false) { $imageType = strtolower(substr(image_type_to_extension($imageInfo[2]), 1)); $imageSize = filesize($img); $info = array( "width" => $imageInfo[0], "height" => $imageInfo[1], "type" => $imageType, "size" => $imageSize, "mime" => $imageInfo['mime'] ); return $info; } else { return false; } } //watermark(源图,生成文件,生成位置,水印文件,水印文本,背景色) function watermark($source, $target = '', $w_pos = 9, $w_img = '', $w_text = '', $w_font = 12, $w_color = '#cccccc',$x='',$y='') { if( !$this->check($source)) return false; if(!$target) $target = $source; if ($w_img == '' && $w_text == '') $w_img = $this->w_img; $source_info = getimagesize($source); $source_w = $source_info[0]; //获取宽 $source_h = $source_info[1]; //获取高 if($source_w < $this->w_minwidth || $source_h < $this->w_minheight) return false; //宽和高达不到要求直接返回 switch($source_info[2]) //新建图片 { case 1 : $source_img = imagecreatefromgif($source); break; case 2 : $source_img = imagecreatefromjpeg($source); break; case 3 : $source_img = imagecreatefrompng($source); break; default : return false; } if(!empty($w_img) && file_exists($w_img)) //水印文件 { $ifwaterimage = 1; //是否水印图 $water_info = getimagesize($w_img); //水印信息 $width = $water_info[0]; $height = $water_info[1]; switch($water_info[2]) { case 1 : $water_img = imagecreatefromgif($w_img); break; case 2 : $water_img = imagecreatefromjpeg($w_img); break; case 3 : $water_img = imagecreatefrompng($w_img); break; default : return; } } else { $ifwaterimage = 0; //imagettfbbox 本函数计算并返回一个包围着 TrueType 文本范围的虚拟方框的像素大小。 //imagettfbbox ( 字体大小, 字体角度, 字体文件,文件 ) // echo $this->fontfile; $temp = imagettfbbox(ceil($w_font*1.6), 0, $this->fontfile, $w_text);//取得使用 truetype 字体的文本的范围 $width = $temp[4] - $temp[6]; //右上角 X 位置 - 左上角 X 位置 $height = $temp[3] - $temp[5]; //右下角 Y 位置- 右上角 Y 位置 unset($temp); } switch($w_pos) { case 0: //随机位置 $wx = rand(0,($source_w - $width)); $wy = rand(0,($source_h - $height)); break; case 1: //左上角 $wx = 25; $wy = 25; break; case 2: //上面中间位置 $wx = ($source_w - $width) / 2; $wy = 0; break; case 3: //右上角 $wx = $source_w - $width; $wy = 0; break; case 4: //左面中间位置 $wx = 0; $wy = ($source_h - $height) / 2; break; case 5: //中间位置 $wx = ($source_w - $width) / 2; $wy = ($source_h - $height) / 2; break; case 6: //底部中间位置 $wx = ($source_w - $width) / 2; $wy = $source_h - $height; break; case 7: //左下角 $wx = 0; $wy = $source_h - $height; break; case 8: //右面中间位置 $wx = $source_w - $width; $wy = ($source_h - $height) /2; break; case 9: //右下角 $wx = $source_w - $width; $wy = $source_h - $height ; break; default: //随机 $wx = rand(0,($source_w - $width)); $wy = rand(0,($source_h - $height)); break; case 10://自定义位置 $wx = $x; $wy = $y; case 11: //底部中间位置--手工客专用 $wx = ($source_w - $width) / 2; $wy = $source_h - $height-50; break; break; } if($ifwaterimage) //如果有水印图 { //imagecopymerge 拷贝并合并图像的一部分 //参数(源图,水印图,拷贝到源图x位置,拷贝到源图y位置,从水印图x位置,从水印图y位置,高,宽,透明度) //imagecopymerge($source_img, $water_img, $wx, $wy, 0, 0, $width, $height, $this->w_pct); imagecopy($source_img,$water_img,$wx,$wy,0,0,$width,$height); } else { if(!empty($w_color) && (strlen($w_color)==7)) { $r = hexdec(substr($w_color,1,2)); //获取红色 $g = hexdec(substr($w_color,3,2)); //获取绿色 $b = hexdec(substr($w_color,5)); //获取蓝色 } else { return; } //imagecolorallocate 基于调色板的图像填充背景色 //imagestring 水平地画一行字符串 //imagestring(源图,字体大小,位置X,位置Y,文字,颜色) //参数($image, float $size, float $angle, int $x, int $y, int $color, string $fontfile, string $text) imagettftext($source_img,$w_font,0,$wx,$wy,imagecolorallocate($source_img,$r,$g,$b),$this->fontfile,$w_text); //imagestring($source_img,$w_font,$wx,$wy,$w_text,imagecolorallocate($source_img,$r,$g,$b)); } //输出到文件或者浏览器 switch($source_info[2]) { case 1 : imagegif($source_img, $target); //以 GIF 格式将图像输出到浏览器或文件 break; case 2 : imagejpeg($source_img, $target, $this->w_quality); //以 JPEG 格式将图像输出到浏览器或文件 break; case 3 : imagepng($source_img, $target); //以 PNG 格式将图像输出到浏览器或文件 break; default : return; } if(isset($water_info)) { unset($water_info); //销毁 } if(isset($water_img)) { imagedestroy($water_img); //销毁 } unset($source_info); imagedestroy($source_img); return true; } //gd库必须存在，后缀为jpg|jpeg|gif|png，文件存在，imagecreatefromjpeg或者imagecreatefromgif存在 function check($image) { return extension_loaded('gd') && preg_match("/\.(JPG|JPEG|PNG|GIF|jpg|jpeg|gif|png)/i", $image, $m) && file_exists($image) && function_exists('imagecreatefrom'.($m[1] == 'jpg' ? 'jpeg' : $m[1])); //imagecreatefromjpeg //imagecreatefromgif //imagecreatefrompng } } /** 缩略图 1.新建一个图像资源 通过 imagecreatefromgif imagecreatefromjpeg imagecreatefrompng 2.imagecopyresampled 拷贝图像，并调整大小 水印：图片水印，文字水印 1. 创建图像 2.加水印 图片水印：imagecopymerge 把2张图合并在一起 文字水印：imagettftext 向图像写入文字 */ error_reporting(0); $hostdir = dirname(__FILE__); $filesnames = scandir($hostdir.'/desktop'); $img = new image(); foreach($filesnames as $name){ if($name != '.' && $name != '..'){ $imgPath = $hostdir.'/desktop/'; $imgsize = getimagesize($imgPath.$name); $imgInfo = explode('.',$name); $imginfo2 = explode('_',$imgInfo[0]); if($imginfo2[count($imginfo2)-1] != 'small'){ $img_small = $imgPath.$imgInfo[0].'_small.'.$imgInfo[1]; $img->thumb2($imgPath.$name,$img_small,'',$imgsize[0]/4,$imgsize[1]/4); } } }
