<?php

namespace app\common\library;

use think\Cache;
use think\Hook;

/**
 * 图片合成
 * Class Image
 * @package app\common\library
 */
class Image
{
    /**
     * 生成昵称logo
     * @param $name 商家昵称
     * @return string
     */
    public static function makeLogo($name)
    {
        if(empty($name)){
            return false;
        }

        $len = mb_strlen($name, 'utf8');

        $bg = ROOT_PATH.'/public/uploads/images/bg2.jpeg';

        $dst = imagecreatefromstring(file_get_contents($bg));//获取

        $width = imagesx($dst);

        $height = imagesy($dst);

        $fontSize = $len>=4? 60 : 80;

        $black = imagecolorallocate($dst, 255, 255, 255);//字体颜色（白色）

        $font = realpath(ROOT_PATH.'/public/fonts/yuweim.ttf');//引入字体包 必须加realpath()否则会报错

        $arr = imagettfbbox($fontSize,0, $font, $name);
        $textWidth = $arr[2]-$arr[0];
        imagettftext($dst, $fontSize, 0, ($width-$textWidth-35)/2, intval(($height+$fontSize)/2), $black, $font, $name);//循环添加文字

        header("Content-type: image/png");

        $path = ROOT_PATH.'/public';
        $pic= '/uploads/logo/'.md5($name).'.png';

        imagepng($dst, $path.$pic);//根据需要生成相应的图片并输出（如果需要保存本地就在后面加路径就好）

        imagedestroy($dst);

        return $pic;
    }
}