[7.5+版] 帝国CMS缩略图函数改进（GD库改进）

帝国CMS缩略图函数改进（GD库改进）
本文关键字词：缩略图，缩略图函数，帝国CMS，帝国CMS，帝国CMS缩略图去黑边框
第一种方式 帝国默认：
sys_ResizeImg($r[titlepic],宽,高,0);//帝国默认的不裁剪缩放生成缩略图的方式
第二种方式 帝国默认：
sys_ResizeImg($r[titlepic],宽,高,1);//帝国默认的裁剪缩放生成缩略图的方式
第三种方式 去掉裁剪不够时的黑边并且从图片缩放后中间裁剪：
sys_ResizeImg($r[titlepic],宽,高,2);//新加去黑边裁剪生成缩略图的方式
第四种方式 只固定图片的宽，高度不限制（类似不规则瀑布流的图片形式），高填写为大于0的任意整数数字：
sys_ResizeImg($r[titlepic],宽,高,3);//新加去黑边生成类似瀑布流格式的方式

前台调用方式如下<?=sys_ResizeImg($r[titlepic],宽,高,3) ?>
/e/class/gd.php 函数全部代码如下：

<?phpdefine('InEmpireCMSGd',TRUE);
//原文件,新文件,宽度,高度,维持比例function ResizeImage($big_image_name, $new_name, $max_width = 400, $max_height = 400, $resize = 1){        $returnr['file']='';        $returnr['filetype']='';        if($temp_img_type = @getimagesize($big_image_name)) {preg_match('//([a-z]+)$/i', $temp_img_type[mime], $tpn); $img_type = $tpn[1];        }else{                preg_match('/.([a-z]+)$/i', $big_image_name, $tpn); $img_type = $tpn[1];        }        $all_type = array(                "jpg" => array("create"=>"ImageCreateFromjpeg", "output"=>"imagejpeg" , "exn"=>".jpg"),                "gif" => array("create"=>"ImageCreateFromGIF" , "output"=>"imagegif" , "exn"=>".gif"),                "jpeg" => array("create"=>"ImageCreateFromjpeg", "output"=>"imagejpeg" , "exn"=>".jpg"),                "png" => array("create"=>"imagecreatefrompng" , "output"=>"imagepng" , "exn"=>".png"),                "wbmp" => array("create"=>"imagecreatefromwbmp", "output"=>"image2wbmp" , "exn"=>".wbmp")        );
        $func_create = $all_type[$img_type]['create'];        if(empty($func_create) or !function_exists($func_create)) {                return $returnr;        }//输出        $func_output = $all_type[$img_type]['output'];        $func_exname = $all_type[$img_type]['exn'];        if(($func_exname=='.gif'||$func_exname=='.png'||
$func_exname=='.wbmp')&&!function_exists($func_output)) {                $func_output='imagejpeg';                $func_exname='.jpg';        }        $big_image = $func_create($big_image_name);        $big_width = imagesx($big_image);        $big_height = imagesy($big_image);        if($big_width <= $max_width and $big_height <= $max_height) {                $func_output($big_image, $new_name.$func_exname);                $returnr['file']=$new_name.$func_exname;                $returnr['filetype']=$func_exname;                return $returnr;        }        $ratiow = $max_width / $big_width;        $ratioh = $max_height / $big_height;        $new_width = ($ratiow > 1) ? $big_width : $max_width;        $new_height = ($ratioh > 1) ? $big_height : $max_height;        if($resize == 1) {                if($big_width >= $max_width and $big_height >= $max_height) {                        if($big_width > $big_height) {                                $tempx = $max_width / $ratioh;                                $tempy = $big_height;                                $srcX = ($big_width - $tempx) / 2;                                $srcY = 0;                        } else {                                $tempy = $max_height / $ratiow;                                $tempx = $big_width;                                $srcY = ($big_height - $tempy) / 2;                                $srcX = 0;                        }                } else {                        if($big_width > $big_height){                                $tempx = $max_width;                                $tempy = $big_height;                                $srcX = ($big_width - $tempx) / 2;                                $srcY = 0;                        } else {                                $tempy = $max_height;                                $tempx = $big_width;                                $srcY = ($big_height - $tempy) / 2;                                $srcX = 0;                        }                }        }elseif($resize == 2){//同比例缩放超出裁切
                if($big_width >= $max_width and $big_height >= $max_height){                        if($max_width >= ($big_width * $ratioh)){                                $tempx=$big_width;                                $tempy=$max_height / $ratiow;                                $srcX=0;                                $srcY=($big_height - $tempy) / 2;                        }elseif($max_height >= ( $big_height * $ratiow)){                                $tempx=$max_width / $ratioh;                                $tempy=$big_height;                                $srcX=($big_width - $tempx) / 2;                                $srcY=0;                        }else{                                $tempx=$max_width;                                $tempy=$big_height;                                $srcX=($big_width - $tempx) / 2;                                $srcY=0;                        }                }else{                        if($max_height >= $big_height){                                $tempx=$max_width;                                $tempy=$big_height;                                $srcX=($big_width - $max_width) / 2;                                $srcY=0;                        }elseif($max_width >= $big_width){                                $tempx=$big_width;                                $tempy=$max_height;                                $srcX=0;                                $srcY=($big_height - $max_height) / 2;                        }                }        }elseif($resize == 3){//宽度固定 高度同比例任意                $srcX = 0;                $srcY = 0;                $tempx = $big_width;                $tempy = $big_height;                if($big_width >= $max_width){                        $new_height=$big_height*$ratiow;                }else{                        $new_height=$big_height;                }        }else { //不保持比例                $srcX = 0;                $srcY = 0;                $tempx = $big_width;                $tempy = $big_height;        }        if(function_exists("imagecopyresampled")){                $temp_image = imagecreatetruecolor($new_width, $new_height);                //echo $tempx;exit;                imagecopyresampled($temp_image, $big_image, 0, 0, $srcX, $srcY, $new_width, $new_height, $tempx, $tempy);        } else {                $temp_image = imagecreate($new_width, $new_height);                imagecopyresized($temp_image, $big_image, 0, 0, $srcX, $srcY, $new_width, $new_height, $tempx, $tempy);        }        /*增加高质量输出图像*/        $zhiliang=$func_exname=='.png'?9:100;        $func_output($temp_image, $new_name.$func_exname,$zhiliang);//$func_output($temp_image, $new_name.$func_exname);        ImageDestroy($big_image);        ImageDestroy($temp_image);        $returnr['file']=$new_name.$func_exname;        $returnr['filetype']=$func_exname;        return $returnr;}
/** 功能：图片加水印 (水印支持图片或文字)* 参数：* $groundImage背景图片，即需要加水印的图片，暂只支持GIF,JPG,PNG格式；* $waterPos水印位置，有10种状态，0为随机位置；*1为顶端居左，2为顶端居中，3为顶端居右；*4为中部居左，5为中部居中，6为中部居右；*7为底端居左，8为底端居中，9为底端居右；* $waterImage图片水印，即作为水印的图片，暂只支持GIF,JPG,PNG格式；* $waterText文字水印，即把文字作为为水印，支持ASCII码，不支持中文；* $textFont文字大小，值为1、2、3、4或5，默认为5；* $textColor文字颜色，值为十六进制颜色值，默认为#FF0000(红色)；** 注意：Support GD 2.0，Support FreeType、GIF Read、GIF Create、JPG 、PNG* $waterImage 和 $waterText 最好不要同时使用，选其中之一即可，优先使用 $waterImage。* 当$waterImage有效时，参数$waterString、$stringFont、$stringColor均不生效。* 加水印后的图片的文件名和 $groundImage 一样。*/function imageWaterMark($groundImage,$waterPos=0,$waterImage="",$waterText="",$textFont=5,$textColor="#FF0000",$myfontpath="../data/mask/cour.ttf",$w_pct,$w_quality){        global $fun_r,$editor;        if($editor==1){$a='../';}        elseif($editor==2){$a='../../';}        elseif($editor==3){$a='../../../';}        else{$a='';}        $waterImage=$waterImage?$a.$waterImage:'';        $myfontpath=$myfontpath?$a.$myfontpath:'';        $isWaterImage = FALSE;        $formatMsg = $fun_r['synotdotype'];
//读取水印文件        if(!empty($waterImage) && file_exists($waterImage)){                $isWaterImage = TRUE;                $water_info = getimagesize($waterImage);                $water_w= $water_info[0];//取得水印图片的宽                $water_h= $water_info[1];//取得水印图片的高
                switch($water_info[2]){//取得水印图片的格式                        case 1:$water_im = imagecreatefromgif($waterImage);break;                        case 2:$water_im = imagecreatefromjpeg($waterImage);break;                        case 3:$water_im = imagecreatefrompng($waterImage);break;                        default:echo $formatMsg;return "";                }        }
//读取背景图片        if(!empty($groundImage) && file_exists($groundImage)) {                $ground_info = getimagesize($groundImage);                $ground_w= $ground_info[0];//取得背景图片的宽                $ground_h= $ground_info[1];//取得背景图片的高
                switch($ground_info[2]){//取得背景图片的格式                        case 1:$ground_im = imagecreatefromgif($groundImage);break;                        case 2:$ground_im = imagecreatefromjpeg($groundImage);break;                        case 3:$ground_im = imagecreatefrompng($groundImage);break;                        default:echo $formatMsg;return "";                }        }else {                echo $fun_r['synotdoimg'];                return "";        }
//水印位置        if($isWaterImage){//图片水印                $w = $water_w;                $h = $water_h;                $label = "图片的";        }else{//文字水印                $temp = imagettfbbox(ceil($textFont*2.5),0,$myfontpath,$waterText);//取得使用 TrueType 字体的文本的范围                $w = $temp[2] - $temp[6];                $h = $temp[3] - $temp[7];                unset($temp);                $label = "文字区域";        }        if( ($ground_w<$w) || ($ground_h<$h) ) {                echo $fun_r['sytoosmall'];                return '';        }        switch($waterPos) {                case 0://随机                        $posX = rand(0,($ground_w - $w));                        $posY = rand(0,($ground_h - $h));                        break;                case 1://1为顶端居左                        $posX = 0;                        $posY = 0;                        break;                case 2://2为顶端居中                        $posX = ($ground_w - $w) / 2;                        $posY = 0;                        break;                case 3://3为顶端居右                        $posX = $ground_w - $w;                        $posY = 0;                        break;                case 4://4为中部居左                        $posX = 0;                        $posY = ($ground_h - $h) / 2;                        break;                case 5://5为中部居中                        $posX = ($ground_w - $w) / 2;                        $posY = ($ground_h - $h) / 2;                        break;                case 6://6为中部居右                        $posX = $ground_w - $w;                        $posY = ($ground_h - $h) / 2;                        break;                case 7://7为底端居左                        $posX = 0;                        $posY = $ground_h - $h;                        break;                case 8://8为底端居中                        $posX = ($ground_w - $w) / 2;                        $posY = $ground_h - $h;                        break;                case 9://9为底端居右                        $posX = $ground_w - $w;                        $posY = $ground_h - $h;                        break;                default://随机                        $posX = rand(0,($ground_w - $w));                        $posY = rand(0,($ground_h - $h));                        break;        }
//设定图像的混色模式        imagealphablending($ground_im, true);
        if($isWaterImage){//图片水印                if($water_info[2]==3) {                        imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $water_w,$water_h);//拷贝水印到目标文件                }else {                        imagecopymerge($ground_im, $water_im, $posX, $posY, 0, 0, $water_w,$water_h,$w_pct);//拷贝水印到目标文件                }        }else{//文字水印                if( !empty($textColor) && (strlen($textColor)==7) ) {                        $R = hexdec(substr($textColor,1,2));                        $G = hexdec(substr($textColor,3,2));                        $B = hexdec(substr($textColor,5));                }else {                        echo $fun_r['synotfontcolor'];                        return "";                }                imagestring ( $ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B));        }
//生成水印后的图片        @unlink($groundImage);        switch($ground_info[2]){//取得背景图片的格式                case 1:imagegif($ground_im,$groundImage);break;                case 2:imagejpeg($ground_im,$groundImage,$w_quality);break;                case 3:imagepng($ground_im,$groundImage);break;                default:echo $formatMsg;return "";        }
//释放内存        if(isset($water_info)) unset($water_info);        if(isset($water_im)) imagedestroy($water_im);        unset($ground_info);        imagedestroy($ground_im);}?>