php生成海报图和文字

   /**
     * @note 生成海报
     * @author 
     * @date 
     * @return void
     */
    public function createPoster($parmas)
    {
        $uid = $parmas['uc_id'];
        if (empty($uid)) {
            throw new Exception("参数有误", 201);
        }
        $shareInfo = [];
        list($userProfile, $classInfo, $getUcInfo) = $this->getUserClass($uid);
        $userSubject = isset($classInfo) && !empty($classInfo['cat_name']) ? $classInfo['cat_name'] : $getUcInfo['name'];
        $shareInfo['user_name'] = isset($userProfile) && !empty($userProfile['user_name']) ? $userProfile['user_name'] : '待填写';
        $shareInfo['className'] = isset($classInfo) && !empty($classInfo['classname']) ? $classInfo['classname'] : '待入学';
        $shareInfo['userSubject'] = isset($userSubject) && !empty($userSubject) ? $userSubject : '待填写';
        $shareInfo['sculpture_img'] = isset($userProfile) && !empty($userProfile['sculpture_img']) ? $userProfile['sculpture_img'] : $this->defaultAvtor;
        $config = $this->posterConfig($shareInfo);
        return $this->generatePoster($config);
    }

    /**
     * @note 海报配置
     * @author 
     * @date 
     * @param array $shareInfo
     * @return void
     */
    public function posterConfig($shareInfo)
    {
        $config['background'] = $this->sharePosterImg;
        $config['text'][] = $this->posterFontConfig($shareInfo['user_name'], 100, 300);
        $config['text'][] = $this->posterFontConfig($shareInfo['className'], 200, 300);
        $config['text'][] = $this->posterFontConfig($shareInfo['userSubject'], 500, 300);
        $config['image'][] = $this->posterImgConfig($shareInfo['sculpture_img'], 10, 200, 0);
        return $config;
    }
    /**
     * @note 文字配置
     * @param $content
     * @param $top
     * @param $left
     * @param $color
     * @param $fontSize
     * @return array]
     */
    public function posterFontConfig($content, $top, $left, $color = '14,14,14', $fontSize = 50)
    {
        return [
            'text' => mb_convert_encoding($content, "html-entities", "utf-8"),
            'left' => $left,
            'top' => $top,
            'fontPath' => $this->fontPath,     //字体文件
            'fontSize' => $fontSize,     //字号
            'fontColor' => $color,       //字体颜色
            'angle' => 0,  //文字水平方向
        ];
    }

    public function posterImgConfig($imgPath, $top, $left, $right, $width = 380, $height = 200)
    {
        return [
            'url'=>$imgPath,     //二维码资源
            'stream'=>0,
            'left'=>$left,
            'top'=>$top,
            'right'=>$right,
            'bottom'=>0,
            'width'=>$width,
            'height'=>$height,
            'opacity'=>70
        ];
    }
    /***
     * @note 生成海报
     * @author 
     * @date 
     * @param $config
     * @param $filename
     * @return false|mixed|string|void
     */
    public function generatePoster($config=array(),$filename=""){
        $filename = './'.time().'.png';
        //如果要看报什么错,可以先注释调这个header
        if(empty($filename)) header("content-type: image/png");
        $background = $config['background'];//海报最底层得背景
        //背景方法
        $backgroundInfo = getimagesize($background);
        $backgroundFun = 'imagecreatefrom'.image_type_to_extension($backgroundInfo[2], false);
        $background = $backgroundFun($background);
        $backgroundWidth = imagesx($background);  //背景宽度
        $backgroundHeight = imagesy($background);  //背景高度
        $imageRes = imageCreatetruecolor($backgroundWidth,$backgroundHeight);
        $color = imagecolorallocate($imageRes, 0, 0, 0);
        imagefill($imageRes, 0, 0, $color);
        imagecopyresampled($imageRes,$background,0,0,0,0,imagesx($background),imagesy($background),imagesx($background),imagesy($background));
        //处理了图片
        if(!empty($config['image'])){
            foreach ($config['image'] as $key => $val) {
                $info = getimagesize($val['url']);
                $function = 'imagecreatefrom'.image_type_to_extension($info[2], false);
                $res = $function($val['url']);
                $resWidth = $info[0];
                $resHeight = $info[1];
                //建立画板 ,缩放图片至指定尺寸
                $canvas=imagecreatetruecolor($val['width'], $val['height']);
                imagefill($canvas, 0, 0, $color);
                //关键函数,参数(目标资源,源,目标资源的开始坐标x,y, 源资源的开始坐标x,y,目标资源的宽高w,h,源资源的宽高w,h)
                imagecopyresampled($canvas, $res, 0, 0, 0, 0, $val['width'], $val['height'],$resWidth,$resHeight);
                $val['left'] = $val['left']<0?$backgroundWidth- abs($val['left']) - $val['width']:$val['left'];
                $val['top'] = $val['top']<0?$backgroundHeight- abs($val['top']) - $val['height']:$val['top'];
                //放置图像
                imagecopymerge($imageRes,$canvas, $val['left'],$val['top'],$val['right'],$val['bottom'],$val['width'],$val['height'],$val['opacity']);//左,上,右,下,宽度,高度,透明度
            }
        }
        //处理文字
        if(!empty($config['text'])){
            foreach ($config['text'] as $key => $val) {
                list($R,$G,$B) = explode(',', $val['fontColor']);
                $fontColor = imagecolorallocate($imageRes, $R, $G, $B);
                $val['left'] = $val['left']<0?$backgroundWidth- abs($val['left']):$val['left'];
                $val['top'] = $val['top']<0?$backgroundHeight- abs($val['top']):$val['top'];
                imagettftext($imageRes,$val['fontSize'],$val['angle'],$val['left'],$val['top'],$fontColor,$val['fontPath'],$val['text']);
            }
        }
        //生成图片
        if(!empty($filename)){
            $res = imagejpeg ($imageRes,$filename,90); //保存到本地
            imagedestroy($imageRes);
            if(!$res){
                throw new Exception("海报图生成失败~");
                exit;
            }
            $client = new \Org\Bce\BosClientUpload();
            $bucketName = '/project/xcx/ahu_dossier/sharePosterImg/';
            $files['name']=sha1(date('YmdHis', time()) . uniqid()).'.png';
            $files['tmp_name']=$filename;
            $resa = $client->SaleSeniorUpload($files, $bucketName);
            $baiduUrl = 'https://ahuyikao-pub.cdn.bcebos.com' . $bucketName;
            if ($resa == null) {
                throw new Exception("海报图生成失败~");

            }
            @unlink($filename);
            return $baiduUrl . $files['name'];
        }else{
            imagejpeg ($imageRes);     //在浏览器上显示
            imagedestroy($imageRes);
        }
    }

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