<?php

namespace frontend\controllers;
use Yii;
use yii\web\IdentityInterface;
use yii\helpers\Url;
// use yii\imagine\Image;

class ImageController extends \yii\web\Controller
{
    public $enableCsrfValidation = false;//取消对POST数据的csrf令牌验证

    public function actionIndex()
    {
        global $_GPC;
        global $_HI;
        global $_FM;
        $_HI['action'] = 'index';

        //本方法采用GD库支持

        //创建图片
        $height = isset($_HI['post']['h']) ? abs($_HI['post']['h']) :(isset($_HI['get']['h']) ? abs($_HI['get']['h']) :0);
        $height = !$height ? 300 : $height;
        $width = isset($_HI['post']['w']) ? abs($_HI['post']['w']) :(isset($_HI['get']['w']) ? abs($_HI['get']['w']) :0);
        $width = !$width ? 300 : $width;

        $im = imagecreatetruecolor($width,$height) or die("Cannot Initialize new GD image stream");     //参数为宽度和高度
        // $im=ImageCreateFromJpg("https://public.hiluker.com/vcms/nopic.jpg");   //使用背景图片创建

        $bc = isset($_HI['post']['bc']) ? ltrim($_HI['post']['bc']) :(isset($_HI['get']['bc']) ? ltrim($_HI['get']['bc']) :'');
        $bc = !$bc ? 'AFAFAF' : $bc;
        $fc = isset($_HI['post']['fc']) ? ltrim($_HI['post']['fc']) :(isset($_HI['get']['fc']) ? ltrim($_HI['get']['fc']) :'');
        $fc = !$fc ? '333333' : $fc;
        //添加颜色
        $bc = $this->Hex2RGB('#'.$bc);
        $fc = $this->Hex2RGB('#'.$fc);


        $text_color = imagecolorallocate($im,$fc['r'],$fc['g'],$fc['b']);
        $background_color = imagecolorallocate($im,$bc['r'],$bc['g'],$bc['b']);
        $default_color = imagecolorallocate($im,5,5,5);

        //绘制矩形图片
        imagefilledrectangle($im , 0, 0, $width-1 , $height-1 , $background_color);  //填充
        // imagefilledrectangle($im , 0, 0, $width-1 , $height-1 , $default_color);  //填充
        // imagerectangle($im , 0, 0, $width-1 , $height-1, $text_color);    //边框

        //添加文字
        $text = isset($_HI['post']['text']) ? trim($_HI['post']['text']) :(isset($_HI['get']['text']) ? trim($_HI['get']['text']) :'');
        $text = !($text) ? '' : html_entity_decode($text);
        // imagettftext ( resource $image , float $size , float $angle , int $x , int $y , int $color , string $fontfile , string $text );
        // 图片源；字体尺寸，文字方向，0从左至右，90从一至下；x、y,首字符起点位置，左下角坐标；color颜色索引。使用负的颜色索引值具有关闭防锯齿的效果；fontfile字体文件
        // imagettftext($im,10,0,$width/2,$height/2,$text_color,"/fonts/STHeiti Medium.ttc","☆");   //中心位置标记

        $strlen = mb_strlen($text);   //字符数(中文算1个字符)
        //BUG 180430 只输入一个字时，部分情况报错（中，0，1,`）;无字符输入时报错
        if($strlen==0){
            imagettftext($im,10,0,$width/2-1,$height/2-1,$default_color,"/fonts/STHeiti Medium.ttc","☆");   //中心位置标记
        }else{
            //文字方向
            $fd = isset($_HI['post']['fd']) ? intval($_HI['post']['fd']) :(isset($_HI['get']['fd']) ? intval($_HI['get']['fd']) : -1);
            if($fd==-1){
              if($width<$height){
                $fd = 270;
              }else{
                $fd = 0;
              }
            }
            $dstyle=1;  //文本框长度以矩形长为限
            // $dstyle=2;  //文本框长度以矩形宽为限
            if($dstyle==1){
                $long = max($width,$height);    //长
                $short = min($width,$height);    //短
                $fd = ($width<$height) ? 270 : $fd;
            }else{
                $long = $width;
                $short = $height;    //短
            }

            //设置文字大小及位置、方向等
            $size_l = round($long/$strlen,2)-0.01;
            $size_l = intval($long/$strlen);
            $size_s = round($short/3,2)-0.01;
            $size_s = intval($short/3);
            $size = min($size_l,$size_s);   //每个字的框宽限制

            $f_w = imagefontwidth(6);
            $f_h = imagefontheight(6);

            $fontsize = intval(($size-$f_w)/1.2);    //字体大小

            $text_w = $f_w;
            if($strlen>1){
                for($i=0;$i<$strlen;$i++){
                    $t = mb_substr($text, $i, 1, 'utf-8');
                    $len = strlen($t);
                    if($len==3){
                        $text_w += $fontsize+$f_w;
                    }elseif($len==2){
                        $text_w += $fontsize*2/3;
                    }elseif($len==1){
                        $text_w += $fontsize*2/3;
                    }
                }
                $text_w = $text_w-$f_w;
            }else{
                $text_w = $fontsize;
            }

            $p_l = $long/2 -$text_w/2;
            $p_l = intval($p_l);
            $p_s = $short/2+$fontsize/2;     //字符串底部-y轴高度
            $p_s = intval($p_s);

            if($fd==90){
                //90度时，右下角位置
                $x = $p_s-$f_h;
                $y = $p_l+$text_w;
            }elseif($fd==270){
                //270度时，左上角位置
                $x = $short/2-$fontsize/2;
                $y = $p_l+$f_w;
            }else{
                //0度时，左下角位置
                $x = ($strlen==1) ? $p_l-$f_w : $p_l-$fontsize/2+2*$f_w;
                $y = $p_s-$f_h;
            }

            // var_dump('文本:'.$text);var_dump('字数:'.$strlen);var_dump('字框宽度:'.$size);var_dump('字体大小:'.$fontsize);var_dump('字体宽度：'.$f_w);var_dump('字体高度：'.$f_h);var_dump('文本框总宽度:'.$text_w);var_dump('字符X轴位置:'.$x);var_dump('字符Y轴位置:'.$y);var_dump('文字方向:'.$fd);die();
            imagettftext($im,$fontsize,$fd,$x+1,$y+1,$default_color,"/fonts/Arial Unicode.ttf",$text);
            imagettftext($im,$fontsize,$fd,$x,$y,$text_color,"/fonts/Arial Unicode.ttf",$text);
        }

        //生成图片
        ob_clean();
        // header("Content-type:image/jpeg;");
        // imagejpeg($im,null,100);
        header("Content-type:image/png;");
        imagepng($im);
        //在根目录下生成图片文件
        // imagejpeg($im,"temp2.jpg",100);
        // imagepng($im,"temp2.png");
        //释放内存
        imagedestroy($im);
    }

    /**
     * RGB转 十六进制
     * @param $rgb RGB颜色的字符串 如：rgb(255,255,255);
     * @return string 十六进制颜色值 如：#FFFFFF
     */
    function RGB2Hex($rgb){
        $regexp = "/^rgb\(([0-9]{0,3})\,\s*([0-9]{0,3})\,\s*([0-9]{0,3})\)/";
        $re = preg_match($regexp, $rgb, $match);
        $re = array_shift($match);
        $hexColor = "#";
        $hex = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F');
        for ($i = 0; $i < 3; $i++) {
            $r = null;
            $c = $match[$i];
            $hexAr = array();
            while ($c > 16) {
                $r = $c % 16;
                $c = ($c / 16) >> 0;
                array_push($hexAr, $hex[$r]);
            }
            array_push($hexAr, $hex[$c]);
            $ret = array_reverse($hexAr);
            $item = implode('', $ret);
            $item = str_pad($item, 2, '0', STR_PAD_LEFT);
            $hexColor .= $item;
        }
        return $hexColor;
    }

    /**
     * 十六进制 转 RGB
     */
    function Hex2RGB($hexColor) {
        $color = str_replace('#', '', $hexColor);
        if (strlen($color) > 3) {
            $rgb = array(
                'r' => hexdec(substr($color, 0, 2)),
                'g' => hexdec(substr($color, 2, 2)),
                'b' => hexdec(substr($color, 4, 2))
            );
        } else {
            $color = $hexColor;
            $r = substr($color, 0, 1) . substr($color, 0, 1);
            $g = substr($color, 1, 1) . substr($color, 1, 1);
            $b = substr($color, 2, 1) . substr($color, 2, 1);
            $rgb = array(
                'r' => hexdec($r),
                'g' => hexdec($g),
                'b' => hexdec($b)
            );
        }
        return $rgb;
    }


    /**
     * 生成图片
     * @param array  参数,包括图片和文字
     * @param string  $filename 生成海报文件名,不传此参数则不生成文件,直接输出图片
     * @return [type] [description]
     */
    function createPoster($config=array(),$filename=""){
      //如果要看报什么错，可以先注释调这个header
      if(empty($filename)) header("content-type: image/png");
      $imageDefault = array(
        'left'=>0,
        'top'=>0,
        'right'=>0,
        'bottom'=>0,
        'width'=>100,
        'height'=>100,
        'opacity'=>100
      );
      $textDefault = array(
        'text'=>'',
        'left'=>0,
        'top'=>0,
        'fontSize'=>32,       //字号
        'fontColor'=>'255,255,255', //字体颜色
        'angle'=>0,
      );
      $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, $color);
      // imageColorTransparent($imageRes, $color);  //颜色透明
      imagecopyresampled($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) {
          $val = array_merge($imageDefault,$val);
          $info = getimagesize($val['url']);
          $function = 'imagecreatefrom'.image_type_to_extension($info[2], false);
          if($val['stream']){   //如果传的是字符串图像流
            $info = getimagesizefromstring($val['url']);
            $function = 'imagecreatefromstring';
          }
          $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) {
          $val = array_merge($textDefault,$val);
          list($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) return false;
        return $filename;
      }else{
        imagejpeg ($imageRes);     //在浏览器上显示
        imagedestroy($imageRes);
      }
    }
}